JPS62260113A - Centering apparatus for glasses lens - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is designed to mount a mounted mirror lens on a peripheral edge polishing machine for eyeglass lenses, and fix the rotation axis during polishing.
This centering device relates to an eyeglass centering device that centers an eyeglass lens by attaching a temporarily fixable clamp holder to the eyeglass lens.
A mounting means for spectacle lenses, a pillar installed perpendicularly to the mounting surface, and a holding member attached to the pillar that is rotatable around the axis of the pillar and temporarily accommodates a clamp holder; The distance between the arm and the mounting surface on the column is such that the clamp holder attached to the arm is
It is adjustable for pressing against a spectacle lens placed on a surface.

PRIOR ART In the case of a conventional IAM known from German Utility Model No. 6941254, the mounting base is a leg that can be attached to a table plate. A column stands upright from this leg, and a pivotable arm is fixed to the column. A spectacle lens with a mark in the center is placed on a mounting table and inspected by a looper. This looper is attached to an arm that extends above the spectacle lens placed on the leg and is fixed to a pillar.

When the center of the spectacle lens is accurately adjusted to the optical axis determined by the louper, the clamp holder arm installed below the loupe arm is pivoted until it is locked. The locking position R is selected such that the clamp holder is located on the optical axis.

The arm is then lowered and the clamp holder with suction cup is pressed onto the spectacle lens, just on the axis of the +ia lens. The clamp holder with the eyeglass lens attached is
When removed from the holding means attached to the arm, it is attached to a peripheral edge polishing machine for eyeglass lenses, and the contour of the eyeglass lens is formed in the circumferential direction.

This conventional device presupposes that the optical center be marked in some way on the spectacle lens surface.

In the case of modern measuring devices, until the optical axis of the measuring device coincides with the optical axis at the apex or optical center of the spectacle lens.
Adjust the spectacle lens parallel to its peripheral surface. This measuring device is a vertex refractometer (cheitelbrechwerti).
esser) and has a substantially vertical front face facing the operator. From this front surface, two measuring heads project forward and determine the vertical optical axis. The spectacle lens is placed between the measuring heads and moved up and down until the optical display shows that the optical axis of the spectacle lens and that of the vertex refractometer coincide between the two measuring heads.

At this position of the 111 lens, the refractive index of the spectacle lens is determined at the apex or on the optical axis and read digitally into the device.

The conventional method of operation is to mark the optical center of the spectacle lens after the apex refractive index is determined by a suitable auxiliary device, then put the spectacle lens into the above-mentioned kind of centering device, and place the spectacle lens in a clamp holder. The method was to add .

Particularly when a large number of spectacle lenses need to be processed, as in the industrial sector, the process of marking the optical center and then separately centering it is not only time-consuming but also often error-prone.

[Problems to be Solved by the Invention] The purpose of the present invention is to make such a process m* and to make it more reliable.

[Means for Solving the Problems] The above purpose is to attach an eyeglass lens to a peripheral edge polishing machine for eyeglass lenses, fix the rotating shaft during polishing,
By attaching a clamp holder that can be temporarily fixed to the spectacle lens, the spectacle lens is centered, and the spectacle lens mounting means, a column installed perpendicular to the mounting surface, and a column surrounding the spectacle lens are arranged. It has an arm that is rotatable about the axis of the column and has a holding member at its free end that temporarily houses the clamp holder, and the distance between the arm and the II mounting surface on the column surrounds the arm. In order to press the clamp holder which has been placed onto the spectacle lens placed on the mounting surface, the adjustable centering 1ifF of the spectacle lens is set by a mounting means,
This is achieved by configuring the column and arm in such a way that they are placed in a positive alignment relative to the measuring device so that they can press against the clamp holder when centering the spectacle lens within the measuring device. .

This allows the necessary centering device in the measuring device to be used to surround the clamp holder in the same arrangement without intermediate steps, ie without marking the optical center.

Realizing this idea by the following method corresponds to the present invention. That is, an arm having a clamp holder that can rotate on a column that occupies a fixed position with respect to the measuring device is placed such that the axis of the clamp holder is located within the optical axis of the measurement stable 4A, and the clamp holder is pressed in this position. The measuring head is moved between the measuring head and above the ophthalmic lens, which is supported and centered in the measuring device.

However, in most cases this embodiment is not practicable due to the constructional constraints that there is no space to move the arm between the measuring heads.

A preferred embodiment of the invention therefore provides that the mounting means, the column and the arm are arranged exclusively on the mounting surface, in a plane perpendicular to the axis of the column, along a guide member that is rigidly connected to the measuring device. movable from a first position in which the fixed spectacle lens is measured and centered in the measuring device to a second position in which the spectacle lens encircling the clamp holder and attached thereto is removed from the centering device; It has the following characteristics.

After achieving centering of the spectacle lens in the measuring device and performing the measurement, the spectacle lens is moved along a guide member rigidly connected to the measuring device while maintaining a defined position.
The arm with the clamp holder can be moved out of the area of the measuring head of the measuring device until it covers the optical center of the spectacle lens and presses against the spectacle lens.

Preferably, the mounting means are movable in the axial direction of the column. This is because this makes it easier to accommodate the spectacle lens in a centered position in the measuring device and to remove it from the area of the measuring head of the measuring device.

In a preferred embodiment, l! The mounting means has a device at an arbitrary position for temporarily fixing the spectacle lens placed parallel to the mounting surface.

This is necessary. This is because the spectacle lens is laterally moved X11u within the measuring device until the optical axis of the spectacle lens coincides with the axis of the measuring device. Therefore, it is possible to adjust the spectacle lens in various positions in the lateral direction when the spectacle lens is placed on a mounting table.

As claimed in claim 5, the device has a separate magnetic holding plate which is attracted to the mounting platform by means of a magnetic device which can be actuated in the required manner.

In particular, if the loading platform is movable along the column, an arm with clamp holder holding means is attached to the column in the axial direction of the column. By raising the mounting table,
The clamp holder can be pressed against the spectacle lens at an appropriate position.

The mounting table has a mounting plate fixed to a column so as to be movable in the vertical direction.

The slide bar and the column are preferably such that the carriage rests on the guide rail and fixes the column, and the column is installed in the area of the guide rail and is parallel to the column and upright on the carriage and supports the support platform. The structure is such that an auxiliary rail that guides the vehicle is installed in the area of a separate guide rail.

It is important that the position of the receptacle relative to the measuring device is as constant as possible. This is based on the fact that the guiding means is installed on a substrate, on which the measuring device can also be mounted in limited positions, and that the measuring device and the guiding means are provided on a common substrate. This is easily achieved by

Since the mounting table is movable in a limited manner along the guide means, it always moves on a limited trajectory also with respect to the measuring device.

[Example] Hereinafter, the present invention will be described based on an example with reference to the drawings.

The centering device 10 is a vertex refractometer (cheitel).
The centering device 10 is fixed together with the measuring device 1 on a common base plate 4 shown in FIG. 1 by means of fixing screws 2.3. There is. The measuring device 1 is shown schematically and has two optical measuring heads 6.7. These measuring heads6.7
are arranged vertically one above the other, as is clear from the second factor! It protrudes from the front surface (also referred to as the operating side) 5 of the measuring device 1 as seen from the observer's side, and determines the vertical light axis 8 of the measuring device 1.

The peripheral edge of the spectacle lens 20 is held by three holding members 11. These holding members 11 are provided with a third
These holding members 11 are movable in the direction of the arrows shown in the figure and can be fixed on a magnetizable holding plate 12, ie made of soft iron or the like.

The holding plate 12 has a flat mounting surface 13 on the upper surface side of the mounting plate 14.
The mounting plate 14 is vertically movable. The holding plate 12 can be placed in a moving position parallel to the mounting surface 13, and is temporarily attracted to the mounting surface 13 by the movement of one or more electromagnets 15, and this mounting surface It is fixed on the surface 13. The mounting plate 14 has a notch 16 that is open toward the front surface 5 of the measuring device 1 . This cutout 16 is larger than the contour of the measuring head 6, which is fitted into the cutout 16. The retaining plate 12 also has a cutout 9 open towards the front face 5.

l! On the underside of the mounting plate 14, two connecting tubes 17, 18 are provided which face each other transversely to the measuring head 6. The axes of these connecting tubes 17 , 18 lie in a plane parallel to the front surface of the measuring device 1 . Connecting pipe 17.
Inside 18, there is a guide bushier and a ball-shaped bushier (ug
A round guide means 21 is fitted from the top (elbusch). Via the support plate 14, the guide means 19.21, along the vertical column 22 located on the left side of the measuring head 6 and the auxiliary column 22 located on the right side of the measuring head 6, as seen in FIG. It is movably guided in the vertical direction.

The lower ends of the pillar 22 and the auxiliary pillar 23 are fixed to both sides of the carriage 24. The carriage 24 is guided by a guide means 25
．． Via 26 a guide rail 27. with a circular cross section.
It is mounted on 28. The guide rails 27,28 are parallel to each other, extend perpendicularly to the front side 5 of the measuring device 1, and are fixed to the base plate 4 via supports 29,31. Pillar 22. The carriage 24 with the auxiliary column 23 is easily moved in a direction perpendicular to the plane of the paper, as seen in FIG.

An arm 30 is attached to the upper end of the column 22 above the carriage 24, and this arm 30 is connected to the column 22.
In a plane perpendicular to the axis of the guide bush 32
It can be pivoted about the post 22 via the holder plate 14 and can be fixed in a laterally pivoted position above the support plate 14 via a detent device 33, which is shown schematically. At the free end of the arm 30 there is provided a fitting 34 for a clamp holder 35 . The clamp holder 35 is
A cylindrical metal part and a suction connected to this metal part! f
It is composed of 36. When the IU plate 14 is moved upward, the eyeglass lens 20 is pressed against the suction filter 36, and as a result, the axis of the metal parts of the clamp holder 35 is
It is positioned to coincide with the optical axis of the spectacle lens 20.

As shown by the solid line in Figures 1 to 3, the arm 3
In the laterally pivoted position 0, this corresponds to the position in which the spectacle lens 20 is measured in the measuring device M1. The arm 30 occupies the position indicated by the broken line in FIG. 1 when the optical center of the spectacle lens 20 is pressed against the suction cup 36 when the carriage 24 is pulled forward, that is, in a direction away from the front surface 5. be.

The operation of the centering device 10 is as follows.

The spectacle lens 20 is mounted between the holding members 11 on the holding plate 12. The carriage 24 is located on the front side 5 of the measuring device 1.
When pushed towards l! The canopy lens 20 is passed between the measuring heads 6.7.

Although it is common to have a mounting table for the spectacle lens 20, it is not shown here. In fact, the measuring head 6
．． The configuration and arrangement of 7 can vary widely.

On the mounting table of the measuring device 1, move 11 until the optical axis of the spectacle lens 20 coincides with the axis 8 of the measuring device 1.
The mirror lens 20 is reciprocated. In the centering position,
A measurement is made with the measuring device 1, for example a determination of the apex diffraction index.

When the position of the spectacle lens 20 is determined, the carriage 24
is moved relative to the front face 5 of the measuring device 1, and t1
The M-plate 14 is lifted from below and, under the action of one or more electromagnets 15, attracts the holding plate 12 to the support surface 13, so that the support plate 14 is not displaced laterally.

This moment is illustrated in FIGS. 1-3. After this,
The spectacle lens 20 is pushed away from the measuring head 6 together with the carriage 24 and forwards, i.e. towards the measuring head 6°7.
is moved outward from the

Next, the arm 30 is equipped with the spectacle lens 20, vt, M
It is moved laterally above the plate 14. This is generally only possible in the forward position of the carriage 24 due to space considerations. By raising the mounting plate 14 toward the suction cup 36, the suction cup 36 suctions the spectacle lens 20. The spectacle lens 20 is removed and immediately
Peripheral polishing for lifl lens 20 to ensure proper installation. It is not necessary to mark the optical center of the spectacle lens 20 or to center the spectacle lens 20, ie to attach the clamp holder 35 to the spectacle lens 20 in a separate device.

[Brief explanation of drawings]

Fig. 1 is a partially sectioned front view of the centering device installed in the measuring device, and Fig. 2 is a partially sectioned front view based on Fig. 1, with the lower part of the left column of the carriage being removed. FIG. 3 is a left side view, and FIG. 3 is a top view. 1... Measuring device, 4... Board, 5... Operation side, 9
... Notch, 10... Centering device, 11...
- Holding member (holding means), 12... Holding plate, 13...
・Four mounting surfaces, 14...Placement plate, 15...Electromagnet, 2
0... Spectacle lens, 22... Pillar, 23... Auxiliary column, 24... Carriage, 27. 28... Guide rail, 30... Arm, 35... Clamp holder. Applicant's agent Patent attorney Takehiko Suzue FIG, 2 FIG, 3

Claims (1)

[Claims] 1. When attaching a spectacle lens to a peripheral edge polishing machine for spectacle lenses, a clamp holder that can be temporarily fixed is attached to the spectacle lens in order to fix the rotating shaft during polishing, In a centering device that centers eyeglass lenses,
A mounting means for eyeglass lenses, a pillar installed perpendicular to the mounting surface, and a holding member attached to the pillar, rotatable around the axis of the pillar, and temporarily housing a clamp holder. The distance between the arm of the column and the mounting surface can be adjusted in order to press the clamp holder attached to the arm against the spectacle lens mounted on the mounting surface. , the mounting means, the column (22) and the arm (30), when centering the spectacle lens (20) within the measuring device (1);
A centering device for eyeglass lenses, characterized in that the device is installed in a reliable arrangement corresponding to the measuring device (1) so as to be able to press the clamp holder (35). 2, the mounting means, the pillar (22) and the arm (3);
0) is the clamp holder (35) from a first position for measuring and centering the spectacle lens (20) limitedly fixed on the mounting surface (13) in the measuring device (1). along a guide member rigidly connected to said measuring device (1) in a second position for attaching and removing the ophthalmic lens fitted thereon from the centering device (10);
2. The eyeglass lens centering device according to claim 1, wherein the device is movable in a plane perpendicular to the axis of the column. 3. The eyeglass lens centering device according to claim 1 or 2, wherein the positioning means is movable in the axial direction of the pillar (22). 4. The mounting means has a device (11, 12, 15) at an arbitrary position for temporarily fixing the spectacle lens (20) placed parallel to the mounting surface (13). A centering device for a spectacle lens according to claim 3. 5. Said device (11, 12, 15) comprises a separate magnetizable retaining plate (12) with a central notch (9), retaining means (11) for said spectacle lens (20), and a front 5. A centering device for eyeglass lenses according to claim 4, characterized in that it is constituted by an electromagnet (15) attached to the writing stand and actuable in any required manner. 6. The arm (30) is attached to the column (22) in its axial direction, according to any one of claims 2 to 5. eyeglass lens centering device. 7. The above-mentioned mounting table has a mounting plate (14) fixed to the pillar (22) so as to be movable in the vertical direction. A centering device for a spectacle lens according to claim 1. 8. Any one of claims 2 to 7, characterized in that the guide means is a slide bar facing the operating side (5) of the measuring device (1). The eyeglass lens centering device described in . 9. The eyeglass lens centering device according to claim 8, wherein the sliding rod is two guide rails (27, 28) installed parallel to each other. 10. A carriage (24) is mounted on the guide rails (27, 28), and the carriage (24) is fixed to the column (22). The eyeglass lens centering device according to item 9. 11. The pillar (22) is installed in the area of the guide rail (27), is parallel to the pillar (22), stands upright on the carriage (24), and serves as an auxiliary guide for the mounting table. The column (23) is a separate guide rail (2
8) The eyeglass lens centering device according to claim 9 or 10, wherein the centering device is installed in the region of claim 8). 12. Claims characterized in that the guide means are installed on a substrate (4), on which the measuring device (1) can also be mounted in a predetermined position. 1st
The eyeglass lens centering device according to any one of items 1 to 11.