JPS59156657A - Machine for working peripheral edge of lens - Google Patents

Abstract

PURPOSE:To make it possible to set a lens into a frame optically and medically appropriately, by providing, in an ophtalmic lens periphery working machine, means for aligning the center of a grinding curve for a V-groove or the like with the optical axis of the lens. CONSTITUTION:A head frame comprising chucking mechanisms 6, 7 for holding and rotating an ophtalmic lens 5, is movable in both horizontal and vertical directions. A lens periphery working machine comprises the head frame 4, devices 13 through 17 for horizontally driving the latter, rotary drive devices 10, 10a, 10b carrying the chucking mechanisms 6, 7 and grounding wheels 20, 21 disposed in a main body 1. Further, the machine includes a lend position detecting device 25, head frame position detecting devices 32, 32a, rotating position detecting devices 11, 12, 50, and a control device which receives detection signals from these detecting devices and computes the position of a V-groove along the periphery of the ophtalmic lens 5 so that the center of a V-groove curve is set on the optical axis of the ophtalmic lens, and which controls the horizontally driving devices 13 through 17.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lens periphery processing machine capable of automatically attaching a bevel to the periphery of a spectacle lens.

In most cases, the periphery of the eyeglass lens is processed into a V-shape called a bevel in order to fit into the rim of the eyeglass frame.

This bevel is formed on the peripheral edge of the eyeglass lens to match the degree of curvature of the inner circumference of the rim of the eyeglass frame, and this degree of curvature is called a bevel curve.

This bevel curve is expressed by K (K=Συ: R is the radius of curvature of the lens), and a specific value of 4 to 6 K is usually selected.

Moreover, spectacle lenses usually have a round shape in their unprocessed state. To form it into the shape of the inner circumference of the frame's rim, 1. Transfer the shape of the inner circumference of the frame's rim to another member, and use the shape (called a positive shape) and the unprocessed element to rotate the lens of the lens edge processing machine. Mount it on the shaft and use a grindstone for tracing.

In this case, the center of attachment of the regular lens to the rotating shaft is usually formed to coincide with the geometric center of the frame. On the other hand, in many cases, the optical center of the lens does not always coincide with the geometric center of the frame, so the lens is attached to the lens rotation axis by being eccentric from the optical center by a necessary amount.

As a result, the part where the lens is attached is offset from the optical center, and since the curvatures of both surfaces of the lens are generally different, the optical axis of the lens does not coincide with the lens rotation axis and is attached and processed in a bent state.

Furthermore, when forming a bevel at the lens periphery in this state, the center of curvature O1 of the bevel with radius of curvature R is the lens rotation axis P,
Since it is located above, a deviation from the optical axis P2 of the lens occurs (FIG. 13).

When a frame incorporating such a lens is worn, the optical axis is no longer parallel to the person's long-distance line of sight, resulting in a prism error that adversely affects the eyes.

To prevent this, it is necessary to process the lens so that the center of the bevel curve is located on the optical axis of the lens.

An object of the present invention is to provide a lens peripheral processing machine that can grind the center of a grinding kerf such as a bevel or a groove curve so that it is aligned with the optical axis of the lens.

The present invention will be described below based on embodiments shown in the drawings.

1 to 5 show embodiments of the present invention.

A support shaft 3 is slidably supported in a horizontal direction (in the axial direction) by a support bearing 2 fixed to a main body frame 1, and a head frame 4 is rotatably attached to the shaft 3 (arrow A).

A recess for chucking the eyeglass lens 5 is formed in the head frame 4. A lens holding shaft 6 and a lens holder shaft 7 are passed through the recess from both sides of the head frame 4, and one end of the lens holding shaft 6 is inserted into the recess. A driving device 8 such as a motor for driving the shaft 6 in the axial direction is connected to the shaft 6, and a rubber or the like for directly pressing the spectacle lens 5 is provided at the other end, although not shown in the figure.

On the other hand, the lens holder has a regular mold 9 shaped like the rim shape of an eyeglass lens attached to one end of the shaft 7, and this regular mold 9 can be replaced. A rubber member or the like (not shown) is provided to directly receive the part 5.

The lens holding shaft 6 and the lens holder shaft 7 are gear train 10a,
The lens holder is synchronously rotated by a lens rotation pulse motor 10 via a transmission device such as a belt 10b (arrow B), and a reference plate 11 having a notch is fixed to the shaft 7 to detect the initial position of lens rotation. A photointerrupter 12 is provided on the head frame 4 so as to hold the reference plate 11 therebetween.

In Figure 2, which shows the machine shown in Figure 1 from the rear,
The support shaft 3 passes through a mouth-shaped portion 4a that is cut out to include the support shaft 3 on the rear side of the head frame 4, so that the support shaft 3 is moved along the support shaft 3 together with the head frame 4 in the horizontal direction (
A connecting member 13 movable in the direction of arrow C) is provided, and the other end of the connecting member 13 is connected to a pulse motor 1 for moving the head frame.
4 and an electromagnetic clutch 15, it is connected to a timing belt 17 that moves horizontally by a pulley 16 fixed to the shaft end of the clutch 15. The initial position of the head frame 4 in the horizontal direction is set by the projecting piece 18 provided at the end of the connecting member 13 shielding the photointerrupter 19 provided on the main body frame 1 from light.

On the main body frame 1, a roughing grindstone 20 and a V-shaped grindstone 21 for bevel processing are installed so that their rotational axes are parallel to the support shaft 3.The rotational drive of the three grindstones 20 and 21 is not shown in the figure. This is done by a motor. In order to receive the earthen wall 9, a regular mold receiver 22 having a curved surface with the same curvature as the grindstone 21 is provided on the main body frame 1 (IIll).The regular mold receiver 22 is not shown in FIG. 1, but its structure is shown in FIG. As shown in the frame body 220
A rack 223 is attached to the rack 223, and a gear 23 is engaged with the rack 223. The gear 23 is rotated by a pulse motor 24 for lowering the earthen wall, and thereby the regular type receiver 22 is configured to move downward (arrow D). The vertical height reference position of the regular type receiver 22 is the fixed guide 22
Photo ink converter 224'l installed on the 5 side:
It is detected by the shimmering light emitted by the base plate 226 attached to the frame body 220 side. 1, close to the grindstone 20,
Detection unit 25 for automatically measuring the edge thickness of the mechanical lens 5
is installed.

As shown in FIG. 3, the detection unit 25 has a photointerrupter 25 attached to the middle part of a shaft 251 to which a contact 250 is fixed.
A light shielding member 253 and a spring 254 are provided to shield light from the contactor 250, and the assembled mechanical lens 5 is swung within the U-shaped portion of the contact 250.
252 is turned on and off.

Further, in order to rotate the head frame 4 around the support shaft 3, a wire 26 whose one end is fixed to the connecting member 13 is provided.
is hung on the second pulley 27 of the head frame 4'' and bent horizontally, and the wire 26 and i4 are fixed to a movable member 29 that moves horizontally by rotation of the screw 28.

The screw 28 is connected to a DC motor 31 via a gear 30. Since the head frame 4 is given a rotational force in the clockwise direction in FIG. 1 due to its own weight, the DC motor 3
1, gear 30, screw 28, moving member 29, wire 26
Thus, a rotational force for rotating the head frame 4 to the left is obtained. In order to detect the rotational position of the head frame 4, an encoder 32 is fixed to the head frame 4, and a small pulley 32a is integrally provided on the rotation axis of the encoder 32. A string 32b is hung between them, and as a result, the encoder 32 rotates in accordance with the rotation of the head frame 4. ! , the initial position of the encoder 32 is at the photo ink club 4b attached to the head frame 4.
It is detected by being illuminated by the base plate 13c attached to the connecting member 13.

In this embodiment, the drive unit includes pulse motors 10 and 14.
, 24 are connected to photo ink acters 4b and 1 for position detection.
I am using 2.19.222.224.252,
This photointerrupter-4b, 12.19.222.
Instead of 224.252, other sensors such as optical sensors, limit switches, etc. can be used. Furthermore, it is also possible to achieve the same function by using DC motors in place of the pulse motors 10, 14, and 24, and a pair of encoders for position detection.

Next, an electric control device used in conjunction with the apparatus shown in FIGS. 1 to 4 will be described with reference to FIG. The electric control device 50 includes a curve value input switch 51a and a measurement start switch 5.
1b; a keyboard section 51 having a predetermined program based on a flowchart described later and the distance from the horizontal reference position to the contact 250 of the assembly grindstone 20, V-shaped grindstone 21, and detection section 25 of the pulse motor 14; A first storage unit 52 that stores the number of drive pulses; has a calculation function;
It has a control section 53 that controls each section according to a program stored in the first storage section 52; and a second storage section 54. The control unit 53 outputs the eyeglass lens rotation pulse motors 1 and 0, the photointerrupter 12 that outputs the mechanical lens rotation reference signal, the head frame drive pulse motor 14, and the horizontal direction reference signal via the pass line 55. A photo interrupter 19, a DC motor 31 that moves the head frame up and down, a photo ink converter 4b that detects the reference position of the up and down movement of the head frame 4, an encoder 32 that detects the amount of up and down movement of the eyeglass lens,
It is connected to a motor 56 for rotating the grindstone, a photointerrupter 222 for a sliding detector, a photointerrupter 224 for detecting the vertical height of a mold holder, and a photointerrupter 252 for measuring the edge thickness of an eyeglass lens.

Next, a flowchart (illustrated in FIG. 6) and other explanatory diagrams (FIGS. 7 to 12) defining the above-mentioned predetermined program
The operation of the device will be explained with reference to.

When the power switch (not shown) is turned on, the DC motor 31
rotates, the wire 26 is pulled to the left in FIG. 2, and as a result, the head frame 4 is lifted upward to a predetermined position.

In this state, the pressing mold 9 and the unprocessed eyeglass lens 5 are chucked. Enter the diameter and curve value into the keyboard section 51 using the input switch 51 & (step 6 in Fig. 6).
0), and the measurement start switch 51b is turned on (step (1)) in FIG. 6 (step 61). Then, the diameter and curve value are stored in the second storage circuit 54 via the control unit 53, and
A pulse motor for moving the head frame is connected to the control unit 53.
The drive tl+ pulse is input to 14. Pulse motor-1
When the photointerrupter 4 rotates and the protruding piece 18 blocks light from the photointerrupter 19, the photointerrupter 19 generates a horizontal reference signal. When the control unit 53 receives the horizontal reference signal, it stops supplying drive pulses to the pulse motor 14 for moving the head frame, and then moves the assembled grindstone from the horizontal reference position stored in the first storage unit 52. The number of pulses corresponding to the distance up to 20 is input to the pulse motor 14 for moving the head frame. Therefore, the unprocessed eyeglass lens 5 remains at a horizontal position corresponding to the assembly grindstone 20. When the control section 53 finishes inputting a predetermined number of pulses to the pulse motor 14 for moving the head frame, it sends a signal to the motor 56 that rotates the assembled grindstone 20, causing the motor 56 (12) to rotate. Next, rotate the DC motor 31,
Advancing the moving member 29 to the right in FIG. 2, rotating the head frame 4 around the support shaft 3 and lowering it from a predetermined position,
When the unprocessed eyeglass lens 5 is placed on the assembly grindstone 20 with a predetermined pressing force, the eyeglass lens 5 is assembled. The control unit 53 also sends a signal to the eyeglass lens rotating pulse motor 10.

Therefore, the unprocessed eyeglass lens 5 is assembled by the assembly grindstone 20 while rotating slowly. Unprocessed eyeglass lenses 5
The end face is ground so that it has almost the same shape as the pressure die 9 that has been attached in advance. The degree of this is adjusted by raising and lowering the regular mold receiver 22 using a pulse motor 24 for pressing the mold up and down. Near the end of the assembly, the pressing die 9 comes into contact with the regular mold receiver 22, the regular mold receiver 22 is thereby rotated, the blocking rod 221 interrupts the photo interrupter 222, and the photo interrupter 222 obtained thereby When the end of the assembly is detected by the signal (step 62 in FIG. 6), the control unit 53 enters the lens radius measurement step (step 63 in FIG. 6), and a rotation reference signal is obtained from the photo ink club 12. A driving pulse is sent to the eyeglass lens rotating pulse motor 10. When the rotation reference signal is obtained from the photointerrupter 12, the control unit 53 enters a step of reading the rotation angle θ and radius r (step 64 in FIG. 6). When the spectacle lens 5 is rotated, the head frame 4 moves up and down in accordance with the change in the radius γ of the spectacle lens 50.

Therefore, the control unit 53 causes the second storage circuit 54 to store a value corresponding to the radius γ of the eyeglass lens 50 obtained from the encoder 32 in correspondence with the number of drive pulses sent to the eyeglass lens rotation pulse motor 10. . If the spectacle lens 5 is rotated by one degree with one pulse, the radius r for each degree is stored in correspondence with the rotation angle. The glasses lens 5 rotates 360 degrees, and the photo interrupter 1
When the rotation reference signal is obtained again from 2, 360 pieces of data have been stored in the second storage circuit 54, and the angle θ
and radius γ reading step (step 64 in Figure 6)
ends. The control unit 53 enters an extreme value detection step (step 65 in FIG. 6). The fl control unit 53 sequentially reads out the values of the radius γ from the second storage circuit 54 and finds the extreme value by comparing the previous and subsequent values. That is, as shown in FIG. 7, if the assembled spectacle lens 5 is considered to be a circle for simplicity, then the position aX where the short axis and long axis each intersect with the outer circumference is
b, c, and d are extreme values. That is, the second storage circuit 54
Inside is actually 1 over 0 to 360 degrees like two series.
Although 360 degree data is obtained for each degree, for the sake of simplicity it is assumed that the data is obtained continuously, and this can be visually shown as shown in FIG. In FIG. 8, the horizontal axis represents the rotation angle of the eyeglass lens 5 from the rotation reference position, and the vertical axis represents the radius γ of the eyeglass lens 50. As is clear from Fig. 8, point a and rotation angle π when the rotation angle is zero.
The radius γ takes the minimum values ra and re at the six points when the rotation angle is −, and the radius r takes the maximum value rbXrd at the point b when the rotation angle is − and the 2d point when the rotation angle is π. .

The positions of the extreme values, ie, points a to d, are stored in the second storage circuit 54. As is clear from FIG. 7, the extreme points a to d are the points where the machining is performed at the apex of the structure grindstone 2o, and the radii ra to rd at these points indicate the true radius of the eyeglass lens 5.

When the extreme value detection step is completed, the control section 53 proceeds to step 66 in FIG. 6 and determines whether or not there is an extreme value. If the spectacle lens 5 is circular, there is no extreme value, but the rotation reference position is determined as the extreme value via step 67 in FIG. Once the extreme values have been determined for all shapes in this way, the step of measuring the edge thickness of the spectacle lens 5 at the extreme value is entered (step 68 in FIG. 6). That is, the control unit 53 applies a drive pulse to the pulse motor 14 to move the head frame 4 in the horizontal direction to a position where the spectacle lens 5 enters the (15) contact 250 of the detector 25. Since the position of the contactor 250 is at a constant distance from the horizontal reference position S, the control unit 53 determines the contact position based on the distance of the assembled grindstone 20 from the horizontal reference position S stored in the first storage circuit 52. The head frame 4 is moved by a distance obtained by subtracting the distance of 250 steps. Thereafter, the control unit 53 sends a rotation signal to the pulse motor 24 to lower the head frame 4 and insert the eyeglass lens 5 into the contact 250. The horizontal position of the lens at this time is set in advance and is called the edge thickness measurement reference position. Thereafter, a signal is sent to the pulse motor 10 for rotating the eyeglass lens so that the extreme value is located within the contact 250.

In this example, since the rotation direction reference position corresponds to the extreme point a, the pulse motor 10 does not rotate. Note that the first memory circuit 52 stores the contacts 250 from the horizontal reference position S.
It is of course possible to store the position from the assembled grindstone 20 to the detection section 25''i! instead of storing the distance thereto.

In FIG. 9, the lens is at the edge thickness measurement reference position.

In this state, when a drive pulse is input to the pulse motor 14 to move the lens to the left, the contact 250 rotates and a signal is output from the photointerrupter 252. The amount of movement t from the edge thickness measurement reference position at that time is the number of pulses (the control unit 53 counts up and down the drive pulses and constantly checks the number of drive pulses corresponding to the current position of the eyeglass lens 5. ) to read. Similarly, it moves to the right and reads the amount of movement 12 from the edge thickness measurement reference position in terms of the number of pulses. As a result, the control unit 53 controls the left and right end faces 25 &, of the contacts 250 stored in advance.
The calculation H(j++z2) is performed from the distance H of 25b to find the edge thickness aD of the lens at point a. The control unit 53 sends a signal to the pulse motor 10, and sequentially inserts the other extreme points 1, 6, and d into the contactor 250, and
Lens edge thickness bl) at point 0 and point d, cDldDf
:Kimeru.

Note that the distance between the left end surface 25a of the contactor 250 and the horizontal reference position S is previously stored in the memory circuit 52, and if this is M, the positions of both end surfaces at point a are M + l I
, M 1 - I l 2, respectively. If these values are set as a TJI and a L2, the other points are bLl
, bT, 2, . . . , dL, , dL2, and these data are stored in the storage circuit 54.

Using FIG. 10 to visually explain the data obtained in this way, the horizontal axis represents the distance I from the horizontal reference position, the vertical axis represents the rotation angle θ of the eyeglass lens 50, and each For points a, b, 0, and d, distances aL1, bLl, cLl, dLl from the horizontal reference position S, and aL, +aDXb, which takes into account the thickness of the eyeglass lens at each point.
t,, +bDXe L, +CI)% dL, 10d
If D is taken, a graph showing the edge of the eyeglass lens 5 can be obtained by connecting points corresponding to point a, point b, point 0, and point d. The shaded area in FIG. 10 indicates the edge thickness of the eyeglass lens (approximately except for points a, b, 0, and d), and the area within this shaded area is the area in which it is possible to attach a calf.

Next, from the @4 points on the front and back surfaces of the lens found above, calculate the spherical surface passing through each of the four points, and calculate the center of curvature 01.02 (point 2 in space) of the front and back surfaces of the lens. . (
Steps 69 and 70 in FIG. 6) Furthermore, a straight line 0102 passing through the two points in the space of the center of curvature 01.02 is calculated (step 71 in FIG. 6). This straight line 0+Ot is the optical axis of the lens.

Here, the center position of the minimum lens edge thickness (d) is determined from the position of the end face of the lens that was previously raised (step 72 in FIG. 6). If the edge thickness distribution is as shown in Figure 10, the point Qa
becomes.

A straight line passing through this point Qa and 0. The radius R (-523) of the specified curve is determined so that the center o1 is on
Step 73 in the figure).

(See FIG. 14) In this way, the slope of an approximately straight line between two adjacent points is determined from the four points Qa-Qd on the lens.

For example, the slope of the approximate tracing line between points Qa and Qb is determined as shown in FIG. 11 (tanα-rb-rab-Qa).
is the axis of rotation of the lens.

In this way, a polygonal curve 100 shown in FIG. 10 is obtained from the points Qa-Qd and the obtained slope. That is, the polygonal curve 100 (FIG. 10) obtained in this manner corresponds to the beveled curve. As shown in Figure 10, point Qa%
If QbXQC%Qd is within the shaded area, the bevel curve 100 can be attached without deviation due to the lens edge thickness. However, if the specified curve is large, the bevel curve 100 may deviate from the lens edge thickness except for the minimum value among the edge thicknesses. In that case, the control unit 53 moves the minimum value in the edge thickness, that is, the point Qa in this example, in the direction of one of the end faces (step 75 in FIG. 6), and moves the remaining edge thickness from the approximate profiling curve. Find the three points Qb, If possible, enter the step of calculating the slope between adjacent points of points Qa-Qd (step 79 in FIG. 6),
If not, the specified curve is inappropriate, so a display etc. is performed and the specified curve value is changed (step 78 in FIG. 6).

In this way, when it is confirmed that the bevel curve is set to the desired edge thickness, the control section 53 does not turn off the bevel, and the pulse motor 24
Send a pulse to raise the regular receiver 22 so that it comes off the contactor 250, and then turn the pulse motor so that the position where the bevel kerf of the eyeglass lens 5 is placed is exactly above the V-shaped grindstone 21.
14 to manually generate the pulse. In the case as explained in FIG. 10, the point Qa at the point a of the spectacle lens 5 is exactly V.
The control unit 53 is equipped with a pulse motor so as to be placed above the mold grindstone 21.
A pulse is applied to 14.

The control unit 53 rotates the rotary motor 56 of the V-shaped grindstone 21, sends a pulse to the pulse motor 24 again, and rotates the main type holder 2.
2, that is, lower the head frame, to completely form a bevel on the eyeglass lens 5, and in order to form a bevel curve, synchronize with the pulse motor 10 and input pulses to the pulse motor 14, which are obtained first. A bevel calf (see FIG. 10) is formed on the outer peripheral surface of the spectacle lens 5.

As a result, a bevel curve having a center of curvature along the optical axis is formed in the spectacle lens 5.

That is, Fig. 13 shows the case where the bevel 5' is formed as the center of the rotation axis P+k of the spectacle lens, and Fig. 14 shows the case where the bevel 5' is formed according to the present invention. When the bevel 5' is formed around the rotation axis P1, the bevel is formed into a curved surface with a radius R and a center O7 on the rotation axis P, so when the processed eyeglass lens is attached to the eyeglass frame. , since the optical axis P2 of the eyeglass lens is tilted with respect to the rotation axis of the lens (coinciding with the far line of sight), an Akamishi prism error occurs, but according to the present invention, the radius of curvature R1 of the back surface of the unprocessed eyeglass lens and the surface After calculating the optical axis P2 by finding the radius of curvature R2, the optical axis P2
Since the center of the bevel curve is determined above, when the processed eyeglass lens is attached to the eyeglass frame, the center of the bevel curve is on the optical axis of the lens, so the distance line of sight and the optical axis will match. Become.

In addition, although the above description has been made using an example of forming a bevel, it can also be applied to what is generally called a grinding curve, such as a groove curve.

In order to determine the edge thickness of the eyeglass lens 5, in the above explanation, the detection part 25 having a concave contact 250 as shown in FIG. 3 was used, but a convex contact 250 as shown in FIG. The edge thickness of the eyeglass lens 5 can also be determined by using the contactor 250'. In this case, in order to bring the spectacle lens 5 into contact with both sides of the convex part of the contactor 250', the width of the convex part is required as data, and the movement of carrying the spectacle lens 5 over the convex part to the opposite side is necessary. It becomes necessary.

Furthermore, a microphone is installed on the head frame 4 in close proximity to the eyeglass lens 5, and the sound generated by slightly grinding both end faces of the eyeglass lens 5, which has been assembled and whose extreme value has been determined, with a grindstone 20 can be heard. By detecting with a microphone, it is possible to obtain a signal similar to the signal from the photo ink club 252 of the detection unit 25, and the position of the edge of the eyeglass lens 5 can be measured.

Similarly, it is also possible to use a vibration sensor or the like instead of a microphone.

As described above, according to the present invention, by measuring the edge thickness of any lens, it is possible to automatically attach an optimal gen curve, so even a person with little experience can easily set it in a short time and without making any mistakes. This method not only has the advantage of not only being able to process eyeglass lenses without the need for a processing machine, but is also expected to save labor in the entire processing process.

Furthermore, it is combined with a device that automatically measures the rim shape of the glasses frame and converts the relationship between the radius and angle of the regular shape into an electrical signal, and the signal is used to drive the regular shape holder 22 with a pulse motor.
The vertical movement by 24 is effective because it is possible to manufacture spectacle lenses without requiring a regular mold, and it is possible to accurately match the spectacle lenses to the spectacle frames.

Furthermore, as described above, according to the present invention, an ideal curved surface can be obtained in a spherical lens in which the centers of curvature on both surfaces of the lens can be accurately determined. This ensures that the lens is optically and medically correctly integrated into the frame.

[Brief explanation of drawings]

1 to 5 show examples of the present invention, in which FIG. 1 is a perspective view, FIG. 2 is a rear view, FIG. 3 is a detailed view of the detection section, and FIG. 4 is a detailed view of the regular mold receiver. FIG. 5 shows a diagram of the blower of the electrical control device. Figure 6 is a flowchart. Figure 7 is an explanatory diagram for determining the radius assuming that the spectacle lens after assembly is a circle. Figure 8 is the relationship between the radius and rotation angle obtained from the spectacle lens in Figure 7. The graphs shown in Fig. 9 are the state where the lens is at the edge thickness measurement reference position, Fig. 10 is the edge thickness distribution diagram of the lens, Fig. 11 is the slope of the approximate tracing line between two adjacent points of the lens, and Fig. 12 is Another embodiment of the contact, FIG. 13 is an explanatory diagram in which a bevel is formed around the rotation axis of a spectacle lens, and FIG. 14 is an explanatory diagram in which a bevel is formed according to the present invention. (27) [Explanation of symbols of main parts] 1...Body frame, 4...Head frame,
5... Glasses lens, 20. 21... Grindstone 25... Lens position detection device (28) Figure 1z, Figure 13, missing Figure 14 β R1-Pi 348-

Claims (1)

[Scope of Claims] A head frame having a chucking mechanism capable of holding and rotating a spectacle lens and configured to be movable in both a horizontal direction and a radial direction of the spectacle lens, and a horizontal drive device for horizontally moving the head frame. , a rotational drive device installed on the head frame and configured to rotate a lens rotation shaft provided with a chucking mechanism; a grindstone installed on the main body frame; a lens position detection device provided close to the grindstone; and the head frame. a head frame position detection device that detects the position of the lens, a rotational position detection device that detects the rotational position of the lens rotation axis, and the lens position detection device;
Input each detection signal from the head frame position detection device and the rotational position detection device, and calculate the position of the bevel or groove on the periphery of the eyeglass lens so that the center of the bevel curve or groove curve is on the optical axis of the eyeglass lens. , a control device that controls the horizontal drive device based on the calculation result in synchronization with a signal from the rotational position detection device. A processing machine for processing a peripheral edge of a lens.