JPS61109649A - Spectacle lens cutting machine - Google Patents

Abstract

PURPOSE:To produce a lens matching accurately with the lens fitting section of spectacle frame through spectacle lens work by providing means for profiling a lens work to be applied under rotation of copying operation while employing a dummy lens as the original die. CONSTITUTION:A dummy lens 3 is placed while matching the pupil point accurately with the center of rotation of base 1 and pressure held by a clamp 2. Then a lens work 6 is stopped coaxially on a rotary head 5 to rotate the base 1 and the rotary head 5 around the axis. Consequently, the assembly of the base 1, the dummy lens 3 and the clamp is slided in predetermined direction against a copying rod 4 in accordance to the profile of the outercircumference of the dummy lens 3. In other word, copying motion is executed and the lens work 6 will perform same copying motion together with the rotary head 5 to apply necessary cutting on the lens work 6 by means of a cutter 21 located at fixed position.

Description

[Detailed description of the invention] The present invention relates to a lens shape cutting machine for eyeglasses.

When cutting eyeglass lens material into a desired contour shape to match the shape of the eyeglass frame, it is necessary to first prepare a type of master mold called a lens shape.

Conventionally, in order to obtain the lens shape of eyeglasses, [I] place the mirror frame flat with the front side facing down, hold it in two places on the side and in two places on the top, and hold it in place with pressers to prevent it from moving. With the tip of the []-shaped copying key pressed lightly against the fitting groove, the copying barrel is moved mechanically to copy the planar shape of the lens fitting groove of the eyeglass frame, and the lens-shaped workpiece is moved according to the copying movement. It depends on how the cutter cuts the paper into the desired contour shape. This conventional method has the following problems.

Since the front side of the eyeglass frame is three-dimensionally curved, it is extremely difficult to fix the eyeglass frame correctly and flat, and therefore it is almost impossible to move the copying key to the lens fitting part of the eyeglass frame without shifting. However, the reality is that you can only obtain a lens shape with an outline that approximates the shape of the eyeglass frame.Also, even if the corner mirror frame is placed correctly and flat, there may be instability in fixing the eyeglass frame. Due to the elastic deformability of the thin parts, when the tracing rod passes through these unstable or thin parts under pressure load, it has a tendency to bulge slightly outward and follow the contour. It is almost impossible to process it into a correct Saturn. Therefore, the outline was cut to match the amount of beads used in the conventional method, and when the J's were fitted, the eyeglass frame was deformed.

AM frame number: The JS fitting part is easy to see and has a good design (because it occupies a large weight, the dimensional error is -1f)
It is usually manufactured in an order of f or less. And the accuracy of the lens shape obtained by the conventional method has an error of 1.0~
It often reaches 1.5 fl. It is said that if the lens fitting part of an eyeglass frame is deformed even slightly from its original shape, it will appear as a different shape to the naked eye. In light of this, the problem is huge.

SUMMARY OF THE INVENTION The present invention eliminates the drawbacks of the prior art described above, and provides a method for producing eyeglasses that guarantees that the lens shape of the eyeglasses that correctly matches the lens fitting portion of the eyeglass frame is cut from the lens shape work according to the size and contour shape. The aim is to provide cutting machines for various types of work.

In order to achieve the above object, a regular shape cutting machine for eyeglasses according to the present invention has needle-like protrusions around the periphery, and places dummy lenses for eyeglasses with the front side in contact with the tips of the protrusions, and a pedestal that rotates in a direction, a clamp that supports the tamire:/z between the pedestal and the pedestal by means of an elastic pressing means to an extent that it does not deform, and is capable of rotating together with the pedestal and the tamire:J;
These copying rods are in contact with the outer periphery of the 121 lens, which is supported between the pedestal and the clamp, and the axis parallel to the axis of the pedestal. A rotating head that rotates in the same direction as the pedestal in the circumferential direction of The contact point of the profiling barrel to the edge, the central axis of the rotary head, and the contact point of the cutter to the lens-shaped work are arranged in parallel on a line, and a point corresponding to the pupil center of the IJ Mi-lens is aligned with the pedestal. A gauge is provided on the clamp, and a magnifying eyepiece facing the gauge is provided, the copying rod is a stationary type, and the pedestal and clamp assembly are integrated with the rotary head, so that each of the central axes and the contact points are in line. A movable type that can slide in the direction in which they are lined up in parallel, or a stationary plate for the pedestal and clamp combination, and a movable type that can integrally slide the copying rod and rotating head in the direction, so that the movable type can be substantially However, the main feature of this is that a spring link is coupled to apply a splicing force so that the copying rod and the eye lens outside W4Ijk are brought into relative pressure contact with each other.

Operation According to the present invention, the workpiece is supported on the rotary head by appropriate means, such as the means described later (for example, by means such as the means described later). When the pedestal and rotating head are fixed concentrically by a suitable means and rotated in the same direction around the axis, the eyeglass dummy lens and the lens-shaped workpiece also rotate in the same way as the pedestal and the rotary head rotate. (=-R: According to the contour shape of the outer periphery of the I, the pedestal, eyeglass daniless and clamp combination body is slid in a predetermined direction with respect to the copying rod, or the copying bale is slid in a predetermined direction with respect to the eyeglass tunny rex.
That is, the upper plate workpiece performs the same tracing motion integrally with the rotary head, and the lens-shaped workpiece is subjected to a required cutting process using a cutter at a fixed position.

Hereinafter, embodiments of the present invention will be explained with reference to the drawings.
1) is the pedestal that rotates in the direction of the axis mb, and (2) is the glasses! - Support the lens 5 (3) with the pedestal (1) by using elastic pressing means (not shown) such as a spring to prevent deformation, and attach the lens to the pedestal (1); A clamp that can be made jointly with (3), (4) is a pedestal (
1) and the dummy lens (3) which is supported with clamping pressure between the dummy lens (3) and the holder (5) which is in contact with the outside FI4 of the eyeglass workpiece (6) and the pedestal. It shows a rotary head that makes the same rotation as the pedestal (1) in the direction of the axis parallel to the axis of (1). 1) and clamp (2)
) A copying rod for the outer periphery of the IJ Mi-lens (3) on the pedestal (1), which is a fixed position on the slide plate (7) on which the combination body and the rotary head (5) can be slid in the left and right directions in FIGS. 1 and 2. The contact point of (4) is placed on the center line passing in the left-right direction in FIG. 2
Attach the head (6) to the tip of the spindle (9).@The above pedestal (1) can be made of a suitable transparent material, such as a sleeve-shaped one made of acrylic resin, and attach the head (6) to the tip of the spindle (9).
It is sufficient to use a sleeve-shaped material including its support frame, and the surface of the eyeglass lens (3) supported between it and the clamp (2) (see Fig. 1) is attached to the pedestal (1). Attach an appropriate number of needle-like protrusions Qυ (for example, four) to the 111I grip, with which the K tips come into contact (lower surface). A gauge (2) is formed at the lower end or upper end of the pedestal (1), and the clamp (2) is equipped with a magnifying eyepiece lens: j, (2) facing the gauge. gauge(
For 2), a nine-plate shape can be used that displays meridians and cotton lines that are at 90 degrees to each other as shown in FIG. If necessary, the clamp (2) may be equipped with a push screw α◆α→ for pressing the side portion of the large dummy lens toward the pedestal (1).

The head (5) is of a suitable fixing type, for example, it has a centering screw (to) that fits into the dust hole (b) at the center of the lens-shaped workpiece (6), and ) fixed position pin hole (IOIIK into which the lens-shaped workpiece (6) is inserted) rotational drive pin (b) Q is a fixed type with a protruding tip on the fIs surface.This type is acceptable. In the head (5)
The pin (to), the pin hole of the lens-shaped workpiece (6)
(b) When the wcus is fitted, the workpiece (6) of the type is fixed to the head (5) in a state of being interlinked and under the rotational drive coupling. To remove the Dobe workpiece (6) or the lens shape machined therefrom from the head (5), use any suitable method known per se, for example, by pulling the handle (2), which causes the head (5) to release its shape. Fixed support (
56) and push the Saturn workpiece (6) or the ball with the end face of the supporter (5a) to remove it. Such release mechanisms are well known to those skilled in the art and are only schematically shown in the figures.

Furthermore, the slide plate (7) is biased to the left in FIG. (3) Spring that presses the outer periphery of J-gu (1).

@ is a cutter that cuts the periphery of the lens-shaped workpiece (6), and this is a stationary type. The cutter (2) is the head (5)
The point of contact with the machining circumference of the upper regular workpiece (6) is on the line connecting the center of the head (6) in Figure 2 and the center of the pedestal (1) and clamp (2) combination in Figure 2. Also, the contact point of the cutter (2) and the tip of the profiling bar (4) on the pedestal (1) side, that is, the contact point on the pedestal (1). The copying rod (4) is placed in a fixed position so that the distance between the contact point and the contact point is equal to the distance between the rotation centers of the base (1) and the head (5).

(2) is a lever for operating the clamp (2);
When the lever (2) is turned upwards, the clamp <2) is lifted via an actuating medium (not shown), and when the lever (2) is released, the clamp (2) is pushed down by an elastic means such as a spring. It looks like this @ Iwa is a stationary support stand with a copying rod (4) attached, and the foundation is a kite board that guides the slide of the slide board (7). 0 (2) is directly connected to the induction seven-tar. reducer (7)
The drive shaft is rotated by a first spindle (8) and a second spindle (9).
These drive systems and transmission systems are installed on the slide board (7).

(to) indicates a traction motor for driving the cutter (2), which drives a crank mechanism (not shown) through a transmission mechanism, and the crank mechanism drives the cutter (2). It moves up and down repeatedly to cut the lens-shaped workpiece (6). The cutter (2) may be replaced by other suitable types.

(7) is a two-position changeover between the first position (the position shown in Figure 2) and the second position (the position displaced from the first position in a direction equivalent to the counterclockwise direction in Figure 1). possible and first
At the position, the operating lever is temporarily restrained by an appropriate stopper (not shown), such as a stopper formed by a small ball retainer pressed by a spring and a hole that engages with the small ball retainer. When brought to position 2, the slide plate (
7) is freed and placed under the spring bias of spring 4, and the pedestal (1) and clamp (
2) When the outer edge of the nine glasses dummy lens (3) supported with pressure between them is pressed against the spring 4 and displaced to the first position, the dummy lens (3) is moved to the copying rod ( Slide II (7) is brought to a position away from 4) (2)
Turn the screw (B) to adjust the position of the copying bar (4), and the supporting joint of the copying bar (4) will be finely moved in the left-right direction in Fig. 2, and the position of the copying bar (4) will be adjusted. The position is adjusted.

(2) is a scale indicating the amount of position adjustment of the copying rod (4).

Cutting of the eyeglass lens shape using the processing machine of the present invention having the upper configuration may be performed in the following manner.

Lift up the clamp (2), and under that condition, attach the eyeglass frame (not shown) to the pedestal (1). Remove the lens (3) and set the front side of the lens to the pedestal (1) side, and set the actual lens focus. Position it so that the corresponding point (i.e., the point corresponding to the center of the pupil) and the angle match the rotation center and angle of the base (1), release the clamp (2), and remove the daele:JS (3). is clamped and supported between the pedestal (1) and the clamp (2).The IJ lens (3) is positioned in an appropriate manner, for example, by placing the eyeglass frame containing the tammy lens on the eyeglass lens user's face. Under the conditions,
That Taele: Mark the J's with the point that coincides with the pupil center as the base point, and the meridian base line that passes through it and is at right angles to each other (
! , ) and 4 groups # (j2) are represented on the dummy: J's, and the group II (
This can be done by aligning the meridian base line (J) and 4 units IIA (12) with L□) and 4 units 1IA (L2), under the light of the transparent pedestal (1) and under the magnifying eyepiece. It is sufficient to check whether the alignment specie is good or not under visual observation through the lens.

On the other hand, the regular workpiece (6) is fixed to the head (5) as described above. In this case, the angle of the lens-shaped workpiece (6) with respect to the head (6) is adjusted if necessary. The angle adjustment can be performed in the same manner as described for Tammy Shin 2 (3) K.

Then, the operation lever () is brought to the second position, and the copying rod (4) is brought into pressure contact with the outside of the lens (3) between the base (1) and the clamp (2). At this time, Tammy lens (
3) is a pedestal (1) using an elastic pressing means such as a spring.
) and the clamp (2) to the extent that it does not deform, i.e., is lightly clamped, but the needle-like protrusion (
Since the tip of the dummy lens (3) is in contact with the surface of the dummy lens (3), this prevents the sitterney lens (3) from shifting due to the above pressure. Since it is made of a plastic material such as acrylic resin, the contact of the tips of the needle-like protrusions (B) with the tips of the needle-like protrusions (B) is sufficient to prevent the tummy lens (3) from shifting forward.

R3: J's (3) is not flat, but curved like a real lens. Therefore, the pedestal (i) and the clamp (2
) If the dummy lens supported by the clamping pressure between the lenses is large, the outer ljl! When the profiling bale (4) makes EE contact with the edge from the lateral direction, a force component in the direction that follows the curvature acts on the 1-race:/, and the profiling bale (4) of Tamire:/″j. Since the side tends to float up, it is better to press the local part of the Yuzo lens toward the pedestal (1) side using the push screw Q4. After inking the Tammy lens (3) and lens-shaped workpiece (6), When the drive wheel (2) is rotated and the first spindle (8) and second spindle (9) are rotated at the same time, the pedestal (1) and the Tammy lens (3) and the head (5) are rotated. The same rotation is performed integrally with the lens-shaped workpiece (6).

With this rotation, the dummy lens (3) and the lens-shaped workpiece (6) are integrally moved with the slide plate (7) to the imitation keyaki (4) according to the contour shape of the outer periphery of the inilet: J's (3). Perform a copying motion in the left-right direction of the figure.

Therefore, if the cutter (2) is operated at an appropriate time,
The lens-shaped workpiece (6) is rotated with the above-mentioned copying motion,
Tammy lens (3) is cut according to the contour shape of the outer periphery.

It goes without saying that the present invention is not limited to the embodiments described above, and that various changes can be made without departing from the gist of the present invention. For example, instead of a clay figurine, a pedestal (
) and clamp υ), the combination body is constant W1 body, and the combination body of profiling salary (4) and head (5) is jgl,
It is a movable type that can slide in the left and right direction as shown in Figure 2, and the IJ Miele: J S (3) under the clamping support between the pedestal (υ and Cracob (2)) is pressed against the outside W41 & 41 (4). The combination of the copying rod (4) and the head (6) may be biased by a spring so that the second spindle (9) is on the side of the head (5), The input shaft spindle and the output side spindle are separated into the output side and the transmission gear ■ side, that is, the input side, and the input shaft spindle and the output side spindle are connected with an offset shaft joint (such as an alternating coupling).
(not shown). In addition, when a lever similar to the above-mentioned lever (7) is provided on this modified side, the latter lever is modified in accordance with the modified example.

Such modifications will be readily understood by those skilled in the art@
Effects of the Invention As described above, in the present invention, the eyeglass IJ lens and the Saturn workpiece are rotated at the same time, the outside of the Tammy lens and the tracing rod are brought into relative pressure contact, and as the lens rotates, , the Tammy lens is relatively tick-like with respect to the copying rod.
Since we performed a sliding motion that follows the contour shape of the outer periphery of the lens, and made the ball workpiece perform the same tracing motion, the contour cutting restrictions for the lens-shaped workpiece that are performed under the rotation that performs this tracing motion are as follows: The dummy lens will be used as a prototype, and the dummy lens will be supported between the pedestal and the clamp without deformation or displacement, so the eyeglass wearer will be able to
Regular type with the same size and shape as the lens, in other words, the size,
It is guaranteed that a piece of earthenware that matches the lens fitting portion of the eyeglass frame can be cut from the lens-shaped workpiece in terms of shape. This is because, as is known by those skilled in the art, originally, eyeglass lenses were made based on the base for forming the eyeglass frame's part. The object of the present invention has a size and shape that exactly matches the lens fitting part of the eyeglass frame. Since the shape and size of the machining are regulated to match the lens shape, the protruding part of the lens fitting part of the Ill Reresis eyeglass frame will be a perfect match, and the am flare machining will be performed by inserting the cut lens. For KIi, it is necessary to match the pupil distance of each individual.In this regard, in the present invention, the position and height of the pupil are matched with the eyeglass frame with a dummy lens placed on the face, and the distance is determined. 1J-I-Mark the area corresponding to the focal point of the lens, and it is possible to accurately (focus), which is useful. This also brings good medical results.

[Brief explanation of the drawing]

Fig. 1 is a front view showing an embodiment of the present invention, Fig. 2 is a plan view thereof, Fig. 3 is a partially omitted side view, and Fig. 4 is a plan view of a gauge according to the embodiment. , FIG. 5 is a plan view of an example of the Tammy lens, and FIG. 6 is a plan view of the Tammy lens. (1) Shape pedestal (2) Mori clan (3) Tammy lens (4) Copying rod (5) Rotating head (6) Saturn workpiece (7) Slide plate (8), (9) Spindle Q1 is the needle-shaped protrusion (2), which is the gauge, and the magnifying eyepiece Q4 is the push screw (1), which is the spring (2), which is the cutter (and above).

Claims (1)

[Claims] (1) A pedestal that has a needle-like protrusion around the periphery, a dummy lens for eyeglasses is placed with the surface in contact with the tip of the protrusion, and rotates in a direction around an axis, and the dummy lens is elastically placed between the pedestal and the pedestal. Supporting the material by means of pressing means to the extent that it does not deform,
A clamp that can rotate together with the pedestal and the dummy lens, a copying rod that comes into contact with the outer periphery of the dummy lens that is supported with clamping pressure between the pedestal and the clamp, and a lens-shaped workpiece of eyeglasses that is concentrically fixed to the above. A rotating head that rotates in the same direction as the pedestal in the direction around an axis parallel to the axis of the pedestal, and a stationary cutter that cuts the lens-shaped workpiece on the rotating head,
The center axis of the pedestal and clamp combination, the contact point of the copying rod to the outer peripheral edge of the dummy lens, the center axis of the rotary head, and the contact point of the cutter to the lens-shaped work are arranged in parallel on a line, and the above-mentioned The pedestal is equipped with a gauge for aligning the pupil center equivalent point of the dummy lens, and the clamp is equipped with a magnifying eyepiece facing the gauge. Specifically, it is a movable type that can slide in the direction in which each of the central axes and the contacts are arranged in parallel on a line,
Alternatively, the pedestal and clamp assembly may be of a stationary type, and the copying rod and rotating head may be of a movable type that can integrally slide in the relevant direction, and the copying rod and the outer periphery of the dummy lens may be substantially movable. A lens-shaped cutting machine for eyeglasses, characterized in that a spring is coupled to the springs so that the two parts come into relative pressure contact with each other.