JPH07314307A - Lens form measuring instrument - Google Patents

Abstract

PURPOSE:To enable proper V-grooving work by finding the lens edge thickness that may be formed after this V-grooving work of a work on the basis of detection information in the lens turning axial direction by means of a feeler part. CONSTITUTION:Each of feeler parts 651 and 653 is equipped with a member whose tip is free of rotation, and comes into contact with both front and rear refracting interfaces of a work lens LE pivoted to a lens turning shaft 28, and simultaneously it is set up on a measuring path of the work lens LE with specified relations to a virtual lens edge path to be secured out of form data of the work lens LE copied out of a mold with a lens rim or lens form of a spectacle frame where the work lens is rimmed in. In addition, on the basis of detecting information in a direction of the lens turning shaft 28 by the feeler parts 651 and 653, a lens edge thickness that may be formed after V-grooving work of the work lens LE is found out.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the formation of a spectacle lens in which a lens is fitted in the lens frame of a spectacle frame, and more particularly to a lens shape measuring device for measuring the edge thickness and the radial length.

[0002]

2. Description of the Related Art In order to insert a lens into a lens frame of a spectacle frame, a template type lens grinding device for grinding a base spectacle lens based on a template processed according to the shape of the lens frame is practically used. Has been converted. On the other hand, the applicant directly digitally measures the lens frame of the spectacle frame in order to eliminate the inconvenience of creating a template in the lens grinding device of the template method, and directly determines the cloth spectacle lens based on the measured value. Japanese Patent Application No. 5 for a direct lens grinding machine for grinding
No. 8-225197. By the way, both of the above-described lens grinding devices have a bevel grindstone for forming a bevel on the lens for supporting the lens in the frame groove of the lens frame.

[0003]

[Problems to be solved by the present invention] Important points for beveling are two points, the position of the bevel apex at the edge and the bevel curve. When measuring the edge thickness, refraction before and after the spectacle lens is performed. Measurement is performed by touching the surface with a tentacle.
However, in the conventional measurement of the edge thickness, frictional resistance is received from the refracting surface of the spectacle lens, and the edge thickness cannot be accurately measured. Even if the measurement can be performed, there is a risk that the refracting surface of the spectacle lens may be damaged or the tentacle itself may be deformed or damaged. In particular, when measuring the edge thickness of an eyeglass lens (EX lens) in which there is a step at the boundary between the distance portion and the near portion due to the difference in lens thickness between the distance portion and the near portion, the tentacle is simply a refracting surface. However, the thickness of the edge could not be measured because the tentacle was caught on the step only when it was in contact with.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems related to the measurement of lens shape, and reduces frictional resistance to the refracting surface of an eyeglass lens without damaging the refracting surface. An object of the present invention is to provide a lens shape measuring device that can accurately measure the edge thickness and that does not deform or damage the feeler portion that is essential for precise measurement.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The constitutional feature of the method for setting an appropriate bevel apex position according to the present invention is that an unprocessed lens is rotatably supported on a lens rotation shaft, and the lens is roughly ground with a rough grindstone. In the method of setting an appropriate bevel position for beveling the lens to be processed after rough grinding with a bevel grindstone, the shape data of the lens frame of the spectacle frame in which the lens to be processed is framed or the lens frame Formed after beveling on the measurement locus of the lens to be processed having a predetermined relationship with the virtual edge locus obtained from the shape data of the lens to be processed which has been roughly ground by the rough grindstone following a template having a shape. The first step of obtaining the edge thickness information, and the bevel apex position information for arranging the bevel apex after beveling at a predetermined position of the edge thickness are obtained in the first step. A second step of obtaining bevel shape information in addition to the edge thickness information obtained, a third step of graphically displaying the bevel shape based on the bevel shape information obtained in the second step, and a graphic display in the third step And a fourth step of adjusting the edge thickness information or the bevel apex position information based on the formed bevel shape and setting the bevel apex position to an appropriate position.

[0006]

According to the present invention, before the beveling of the lens to be processed, the bevel shape which will be formed after the processing of the lens is graphically displayed and adjusted to the desired edge thickness and the bevel apex position. Since it is possible to set an appropriate bevel vertex position, it is actually possible to frame whether the lens after grinding has been beveled to a size suitable for the lens frame to be framed, as in the past. It can be determined without working, and by connecting to a grinding device, proper beveling can be performed even at a distant place.

[0007]

【Example】

Overall Configuration of Apparatus FIG. 1 is a perspective view showing the overall configuration of a lens grinding apparatus according to the present invention in a partially cutaway section. A frame shape measuring device 200, which will be described later, is built in the lower front part of the housing 1, and an opening 10 for inserting and removing the frame holder is formed in the front side wall surface of the housing 1. A vertically openable door 10a is attached below the opening. Also,
A keyboard 1000 and a display device 2000, which will be described later, are vertically arranged side by side on the upper right side of the front wall surface. In the grindstone chamber 30 of the housing 1, a rough grindstone 3a for glass lens is used.
A grindstone 3 composed of a rough grindstone 3c for a plastic lens, a bevel grindstone 3b, and a flat precision grindstone 3d is fixed to a rotary shaft 31. The rotary shaft 31 is rotatably supported on the wall surface of the grindstone chamber 30, and a pulley 53 is attached to the end of the rotary shaft 31. The pulley 53 is connected via a belt 52 to a pulley 51 attached to the rotating shaft of a grindstone rotating motor 5 composed of an AC drive motor. With this configuration, when the motor 5 rotates, the grindstone 3 rotates.

A shaft 11 is axially slidably supported on a bearing 12 of the housing 1, and rear arms 33a and 33b of the carriage 2 are rotatably axially supported on the shaft 11. Front arm 34a, 3 of the carriage 2
Lens rotation shafts 28a and 28b are coaxially and rotatably supported by 4b. The lens rotation shaft 28a on the right side in FIG. 1 has a lens chucking mechanism having a known configuration, and is moved in the axial direction by rotation of the chucking handle 29 to move the lens LE to be processed into rotation shafts 28a, 28.
It can be clamped with b. On the other hand, on the outer end portion of the left lens rotation shaft 28b, there is a disc 27a that abuts against a stopper device 42 described later.
And a template holding portion 27b for holding the template are attached. Pulleys 26a and 26b are attached to the lens rotation shafts 28a and 28b, respectively, and a drive shaft 25 having pulleys 23a and 23b at both ends is built in the carriage 2. A worm wheel 22 is attached to one end of the drive shaft 25, and meshes with a worm gear 21a attached to the rotation shaft of a lens shaft rotation motor 21 which is a pulse motor. Pulley 23
Timing belts 24a and 24b are stretched between a and 23b and pulleys 26a and 26b. With these configurations, the rotation of the motor 21 is controlled by the lens rotation shafts 28a, 28a.
It is converted into the rotation of b, and the lens LE to be processed is rotated.
On the other hand, a lens measuring device 60 described later is provided in the carriage 2.
0 is built in.

The end of the shaft 11 is fitted to the arm 40 of the frame 4 for moving the carriage. Frame 4
The shaft is slidably supported by a shaft 41 attached to the housing 1, and a feed screw 61 is screwed therein. The feed screw 61 is fixed to a rotary shaft of a carriage moving motor 60 including a pulse motor. With this configuration, when the motor 60 rotates, the frame 4 moves in the left-right direction, and the carriage 2 moves in the left-right direction via the shaft 11. The frame 4 is also provided with an after-mentioned stop device 42 and a grinding pressure control device 43. The grinding pressure control device 43 includes a pin 43a implanted in the carriage 2.
Are abutted.

FIG. 2 shows II-II 'of frame 4 in FIG.
It is a visual cross section. The abutting stop device 42 is roughly composed of an abutting stop vertical motor 420, which is a pulse motor, and a support 421 and an abutting stop member 422, which are arranged on the lower surface of the frame 4. The feed screw 423 attached to the rotating shaft of the motor 420 is screwed with the female screw portion 424 of the support column 421. A key 425 is planted on the side surface of the support column 421, and the key 425 is fitted into the key groove 44 formed in the frame 4. A photo sensor unit 427 is attached to the table portion 426 at the upper end of the column 421. The stopper member 422 is attached to the end of the table portion 426 by a shaft 428 that is rotatably fitted.
It is attached to the table portion 426 so as to be rotatable around the center of rotation. A spring 470 is inserted between the contact stop member 422 and the table portion 426, and the contact stop member 422 is always lifted upward as indicated by the chain double-dashed line by the action of the spring 470.

Inside the stopper member 422, the light-shielding rod 4
29, the stopper member 422 is located between the photo sensor units 427 when pushed down, and acts so as to block light running in the unit 427.
In addition, the eccentric cam 47 is provided inside the stopper member 422.
1 is attached, and by rotating this, the distance between the cam surface and the table portion is changed and the stopper member 422 is attached.
The stop position of can be finely adjusted. Stop member 4
An arcuate portion 422a having the same curvature as that of the rough whetstone 3a and a horizontal cutting surface 422b are formed on the upper surface of 22. During the grinding process using the template, the template SP attached to the carriage 2 contacts the arc-shaped portion 422a. Also,
The disk 27a comes into contact with the horizontal cut surface 422b when grinding is performed using the lens frame shape measurement data of the frame.
By the way, in the present embodiment, the detection of the template is detected by the contact of the template with the stopper member 422 as described above.
The present invention is not limited to this. For example, a method may be used in which the movement of the template, that is, the processing progress of the lens is checked depending on the presence or absence of the edge of the template between the photosensor units.

The grinding pressure control device 43 has a pulse motor 432 having a feed screw 431, a piston 434 screwed with the feed screw 431 by a female screw portion 433, and slidably mounted on the outer wall of the piston 434. Cylinder 435 and a spring 43 arranged between the cylinder 435 and the piston 434.
6 and 6. A key 437 is planted outside the flange of the piston 434, and the key 437 is fitted in a key groove 45 formed in the frame 4. The upper surface 435a of the cylinder 435 is in contact with the side surface of the pin 43a attached to the carriage 2 and supports the own weight of the carriage 2 by the elastic force of the spring 436. Motor 43
2 rotation causes the piston 434 through the feed screw 433.
By moving up and down, the amount of compression of the spring 436 changes, and the amount of force that supports the carriage 2 changes, so that the grinding pressure of the lens LE to be processed onto the grindstone 3 can be changed.

Lens Frame Shape Measuring Apparatus Next, the configuration of the lens frame shape measuring apparatus 200 will be described with reference to FIGS. FIG. 3 is a perspective view showing a lens frame shape measuring device according to the present invention. This device is roughly 3
Frame holding device part 100 for holding one part, that is, a frame, and a supporting device part for supporting the frame holding device part 100 and for transferring the holding device part to and from the measurement surface. 200A and a measuring unit 300 for digitally measuring the shape of the lens frame of the eyeglass frame or the template. Support device section 2
00A has a housing 201. The housing 201 has a foot portion 25
3 and 254, and the legs 253 and 254 are slidably mounted on rails 251 and 252 attached to the housing 1 of the lens grinding machine. Further, the door 10a has rails 255 and 256, and when the door 10a is opened, the rails 255 and 256 respectively have rails 251 and 252.
It is configured to be located on the extension line of. With this configuration, the operator can slide the housing 201 out of the apparatus housing 1 as necessary.

The housing 201 also has guide rails 202a and 202b installed on the housing 201 in parallel to the longitudinal direction (X-axis direction of the measurement coordinate system), and the moving stage 203 is slidable on the guide rails. It is placed in. A female screw portion 204 is formed on the lower surface of the moving stage 203, and an X-axis feed screw 205 is screwed onto the female screw 204. The X-axis feed screw 205 is rotated by an X-axis motor 206 which is a pulse motor. A guide shaft 208 is passed between the both side flanges 207a and 207b of the moving stage 203 in parallel with the Y-axis direction of the measurement coordinate system, and the guide shaft 208 can be rotated by a guide shaft motor 209 attached to the flange 207a. It is configured. A single guide groove 210 is formed on the outer surface of the guide shaft 208 in parallel with the shaft. Guide shaft 20
Hands 211 and 212 are slidably supported by the unit 8. Projected portions 213a and 214a are formed in the shaft holes 213 and 214 of the hands 211 and 212, respectively, and these projected portions 213a and 214a are formed in the guide shaft 2 described above.
08 is engaged in the guide groove 210, and the hands 211, 2
The rotation around the 12 guide shafts 208 is prevented.

The hand 211 has two slopes 2 which intersect each other.
15 and 216, the other hand 212 also has two slopes 217 and 218 that intersect each other. Hand 2
The ridge line 220 formed by the twelve slopes 217, 218 is parallel to the ridge line 219 formed by the slopes 215, 216 of the hand 211 and is located in the same plane.
The angle formed by 218 and the angle formed by the slopes 215, 216 are the same. And both hands 211,
A spring 230 is bridged between the 212 as shown in FIG. Further, notches 215a and 217a are formed on the slopes 215 and 217, respectively. An arm 241 having a contact wheel 242 at one end is attached to the hand 212 so as to be rotatable around the other end. The arm 241 is always in contact with the micro switch 244 by the spring 243. These contact wheels 242 and arms 24
1, the spring 243, and the micro switch 244 constitute the left and right eye determination device 240 of the frame. Moving stage 203
A pulley 222 is rotatably supported at one end of the rear flange 221 and a Y-axis motor 2 including a pulse motor having a pulley 223 at the other end of the rear flange 221.
24 is attached. A mini-chia belt 226 having a spring 225 interposed is stretched over the pulleys 223 and 224, and both ends of the mini-chia belt 226 are fixed to pins 227 planted on the upper surface of the hand 211. On the other hand, a flange 228 is formed on the upper surface of the hand 212, and the flange 228 is configured to come into contact with the side surface of the pin 229 planted on the rear flange 221 of the moving stage 203 by the movement of the hand 212. ing.

The measuring section 300 is composed of a sensor arm rotation motor 301 which is a pulse motor mounted on the lower surface of the housing 201 and a sensor arm section 302 which is rotatably supported on the upper surface of the housing 201. A belt 305 is stretched between a pulley 303 attached to the rotation shaft of the motor 301 and a rotation shaft 304 of the sensor arm portion, and the rotation of the motor 301 is transmitted to the sensor arm portion 302. The sensor arm unit 302 includes two rails 311 and 31 provided above the base 310.
1, the sensor head portion 312 is slidably mounted on the rails 311 and 311. A magnetic scale reading head 313 is attached to one side surface of the sensor head portion 312, so that the magnetic scale 314 attached to the base 310 in parallel with the rail 311 is read and the amount of movement of the sensor head portion 312 is detected. Has been done. Further, one end of a constant torque spring 316 of a spring device 315 that constantly pulls the head portion 312 toward the arm end side surface is fixed to the other end of the sensor head portion 312.

FIG. 8 shows the structure of the spring device 315. Inside the casing 317 attached to the base 310 of the sensor arm unit 302, the electromagnetic magnet 31
8 is provided, and the slide shaft 319 is fitted in the shaft hole of the magnet 318 so as to be slidable in the axial direction. The slide shaft 319 has collars 320 and 321.
The spring 323 is interposed between the wall of the casing 20 and the wall of the casing 317, and the slide shaft 319 is normally moved leftward in FIG. 8 by the spring 323. Clutch plates 324 and 325 are rotatably supported at the end of the slide shaft 319.
One end of a constant torque spring 316 is fixed to one crack plate 324. A spring 326 fitted with a slide shaft 319 is interposed between the clutch plates 324 and 325, and the gap between the clutch plates 324 and 325 is constantly widened to prevent contact between the constant torque spring 316 and the clutch plate 325. . Further, a washer 327 is attached to the end of the slide shaft 319.

FIG. 11 shows the structure of the sensor head portion 312. A shaft hole 351 is formed in the slider 350 supported by the rail 311 in the vertical direction.
The sensor shaft 352 is inserted in the position 1. Sensor axis 3
A ball bearing 353 held by the sensor shaft 352 is interposed between the shaft 52 and the shaft hole 351 to smooth the rotation of the sensor shaft 352 around the vertical axis and the movement in the vertical axis direction. An arm 355 is attached to the center of the sensor shaft 352.
On the upper portion of 55, a bevel feeler 356 in the form of a abacus ball which has an inclination equal to the bevel inclination angle of the bevel grindstone 3b that comes into contact with the bevel groove of the lens frame is rotatably supported. The circumferential point of the bevel feeler 356 is arranged on the center line of the vertical sensor shaft 352. Next, the configuration of the frame holding device section 100 will be described with reference to FIGS. 4 and 7. Side 1 of fixed base 150
Both side flanges 151, 151 having 51a, 151a
Frame holding bars 152, 152 are screwed to the center of the frame. Further, inverted U-shaped bridges 151b and 151c are fixed to the flanges 151 and 151. When the holding device 100 is inserted between the hands 211 and 212 when the holding device 100 is inserted between the hands 211 and 212, the bridges 151b and 151c come into contact with the shoulders of the notches 215a and 217a of the hands to prevent the holding device from being inserted. It is provided in. Bottom plate 150a of fixed base 150 and flange 15
Movable base 1 having sides 153a, 153a between 1
53 is inserted, and the movable base 153 is the two leaf springs 15 attached to the bottom plate 150a of the fixed base 150.
4, 154.

Two parallel guide grooves 155 and 155 are formed on the movable base 153, and as shown in FIG. 7, the projecting legs 156a and 156a of the sliders 156 and 156 are engaged with the guide grooves 155 and 155. The slider 15
6, 156 are slidably mounted on the movable base 153. On the other hand, a circular opening 1 is formed at the center of the movable base 153.
57 is formed, and a ring 158 is rotatably fitted on the outer periphery thereof. Two pins 159 and 159 are planted on the upper surface of the ring 158.
9 are the stepped portions 15 of the sliders 156 and 156, respectively.
6b, 156b are formed in slots 156c. Further, vertical notches 156d and 156d are formed in the centers of the sliders 156 and 156, respectively.
The frame holding rod 1 described above is provided in the notches 156d and 156d.
52 and 152 can be inserted respectively. Also,
Holes 156e and 156e are formed on the upper surfaces of the sliders 156 and 156 so that the operator can easily insert his / her finger when operating the slider. Next, the operation of the frame shape measuring apparatus described above will be described based on FIGS. 5, 6, 9 and 10. First, as shown in FIG. 5, by inserting fingers into the holes 156e, 156e of the sliders 156, 156, the sliders 156, 156 are sufficiently spaced apart from each other and pressed downward, together with the movable base 153, A sufficient distance is provided between the holding rod 152 and the stepped portions 156b and 156b of the sliders 156 and 156 against the volatility of the leaf springs 154 and 154. After that, insert the lens frame 501 of the spectacle frame 500 to be measured into this interval,
The upper and lower rims of the lens frame 510 are the slider 15
6, 156 so as to abut the inner wall of 156,
Reduce the spacing of 156. In this embodiment, since the sliders 156 and 156 have the connecting structure by the ring 158 as described above, the sliders 156 and 156 are provided.
The amount of movement of one slider gives the same amount of movement as it is to the other slider.

Next, when the frame 500 is slid so that the substantially center of the upper rim of the lens frame 501 is below the holding rod 152, the operator releases the sliders 156 and 156, as shown in FIG. As described above, the movable base 153 rises due to the elastic force of the leaf springs 154 and 154, and the lens frame 50
1 is the stepped portions 156b and 156b and the holding rods 152 and 152.
And the frame 500 holds the lens frame 50.
It is held so that the substantially geometrical center point of 1 and the center point 157a of the circular opening 157 of the frame holding device 100 substantially coincide with each other. At this time, the distance d from the apex 501a of the bevel groove of the lens frame 501 to the side 151a of the flange 151 of the fixed base 150 and the side 153 of the movable base 153.
The distance d to a is configured to have the same value. Next, as shown in FIG. 9, the frame holding device section 100 holding the frame 500 in this way is set on the supporting device 200 with the hands 211 and 2 which are set at predetermined intervals.
Insert between 12 At the same time, the left and right eye determination device 24
When the contact wheel 242 is abutted by the frame 500 and the arm 241 is rotated, 0 is the micro switch 244.
Contact turns off. Accordingly, the determination device 240 automatically determines that the measured lens frame 501 is for the left eye. Next, the Y-axis motor 224 is rotated by a predetermined angle. The mini-chia belt 226 is driven by the rotation of the Y-axis motor 224, the hand 211 is moved leftward by a certain amount, the frame holding device section 100 and the hand 212 are also induced to move leftward, and the collar 228 is disengaged from the pin 229. At the same time, the frame holding device section 100 is held between the hands 211 and 212 by the tension spring 230. At this time, the sides 151a and 152a of the flange 151 of the fixed base 150 of the frame holding device section 100 are respectively formed by the slope 2 of the hand 211.
15 and the slope 217 of the hand 212, and both sides 153a and 153a of the movable base 153 contact the slope 216 of the hand 211 and the slope 218 of the hand 212, respectively.

In this embodiment, the distances d from the apex 501a of the bevel groove of the spectacle frame 501 to the sides 151a and 153a are equal to each other, as described above.
When the frame holding device 100 is sandwiched by the hands 211 and 212, the bevel groove apex 501a of the lens frame 501 is automatically positioned on the reference plane S formed by the ridge lines 219 and 220 of both hands. Next, by rotating the guide shaft rotation motor 209 at a predetermined angle, the frame holding device section 100 turns to the position shown by the chain double-dashed line in FIG.
It stops at the same plane as the initial position of the bevel feeler 356 of 0.

Next, the hands 211 and 2 holding the frame holding device section 100 by further rotating the Y-axis motor 224.
12 is moved in the Y-axis direction by a certain amount, and the circular opening center point 159a of the frame holding device section 100 and the rotation axis 304 center of the measuring section 300 are approximately aligned. At this time, the bevel feeler 356 contacts the bevel groove of the lens frame 501 during the movement. As shown in FIGS. 9 and 10, the initial position of the bevel feeler 356 is such that the pin 352a implanted at the lower end of the sensor shaft 352 comes into contact with the hanger 310a attached to the base 310 of the sensor arm section. That direction is regulated. As a result, when the spectacle frame 500 moves due to the rotation of the Y-axis motor 224, the feeler 356 can always enter the bevel groove. Then, the motor 301 is rotated every predetermined number of unit rotation pulses. At this time, the sensor head portion 312 moves on the rails 311 and 311 according to the shape of the spectacle frame 500, that is, the radius vector of the lens frame 501, and the movement amount is read by the magnetic scale 314 and the reading head 313.

From the rotation angle θ of the motor 301 and the reading amount ρ from the reading head 313, the lens frame shape is measured as (ρ _n , θ _n ) (n = 1, 2, 3, ... N). Here, this first measurement is as described above.
As shown in FIG. 12, the center O of the rotating shaft 304 is measured so as to substantially coincide with the geometric center of the lens frame 501. Therefore, in the second measurement, the measured data having the maximum value in the X-axis direction is obtained from the data (X _n , Y _n ) after the polar coordinate-orthogonal coordinate conversion of the first measurement data (ρ _n , θ _n ). Point B
(X _b , y _b ), the measured point D having the minimum value in the X-axis direction
(X _d , y _d ), the measured point A having the maximum value in the Y-axis direction
(X _a, y _a) and the measurement point having the minimum value in the Y-axis direction C
(X _c, y _c) to select the geometric center O ₀ of the lens frame _{O 0 (x 0, y 0} ) = calculated as _{(x b + x d / 2} , y a + y c / 2) ... (1) After that, from the lens frame geometric center distance FPD of both frames 500 of the frame 500 schematically input in advance from the keyboard 1000 described later and the pupil distance PD of the wearer's eye, (FPD-PD) / 2 = The inner displacement amount I is calculated as I, and the position of the pupil of the wearing eye, that is, the position O _s ( _s X ₀ , _s Y ₀ ) at which the optical center of the lens to be processed should be located based on the amount U of upward displacement from the keyboard 1000. the _{O s (s X 0, s} Y 0) = (X 0 + I, Y 0 + U) = (x b + x d) / 2 + I, (y a + y c) / 2 + U = (x b + x d) / 2 + ( FPD-PD) / 2, obtained as _{(y a + y c) /} 2 + U ····· (2). Based on these _s X _o and _s Y _o values, the X-axis motor 206 and the Y-axis motor 224 are driven, and the hand 2
The frame holding device section 100 sandwiched by the reference numerals 11 and 212 is moved, whereby the pupil center position O _s of the lens frame 501 is moved.
With the rotation center O of the sensor arm 302, the lens frame shape is measured again, and the measured values ( _s ρ _n , _s θ _n ) at the pupil center position O _s (n = 1, 2, 3, ..., N)
Ask for.

When the bevel feeler 356 sometimes comes off from the lens frame 501 during the measurement of the radius vector of the lens frame 501 described above, as shown by e in FIG. Since it largely deviates from the measurement data of, the radius change range a is defined in advance, and when it deviates from that range, the sensor arm unit 302
Rotation is stopped, and at the same time, the electromagnetic magnet 318 of the spring device 315 shown in FIG. 8 is excited to attract the collar 321.
As a result, the clutch plates 324 and 325 cause the constant torque spring 3 to move.
Since 16 is sandwiched and its winding action is prevented, the arm 355 of the sensor head portion 312 can be prevented from being caught in the lens frame and scratching the eyeglass frame 500. After the feeler 356 is dislocated in this way, the eyeglass frame 500 is returned to the initial measurement position again and measurement is performed again. If the bevel feeler 356 does not come off the frame 500, the door 10
Since it is configured so that the housing 210 can be pulled out by opening a (see FIGS. 1 and 3), the operator can easily remove the feeler.

Lens Measuring Device Next, a lens measuring device for detecting the moving radius, edge thickness, curve value, etc. of the lens to be processed built in the carriage 2 will be described with reference to FIGS. 17 to 21. . The base frame 601 has two parallel guide rails 602, 60.
2 is provided, and a movable base 603 is slidably arranged on the rail 602. A feed screw 604 is screwed onto the moving base 603, and the feed screw 604 is driven by a lens radius sensor motor 605 including a pulse motor. A moving frame 610 is fixed to the upper surface of the moving table 603. Two parallel rails 612 are provided between the rear wall piece 611 of the moving frame 610 and the moving base 603.
(Only one is shown in FIG. 18) is passed, and a suspension base 613 is slidably mounted on the parallel rail 612. Suspension base 613 and base frame 6
A constant torque spring member 614 is disposed between 01 and 01, and acts so as to bring the suspension base 613 into contact with the rear surface of the moving base 603 at the initial stage. An arm 621 of the lens radius sensor 620 is fixed to the front side surface of the suspension base 613. Arm 6
As shown in FIGS. 19 to 21, a modified H-shaped hand arm 62 is attached to a cono-shaped flange 622 at the tip of 21.
3 is attached at one end thereof so as to be rotatable about the axis O ₃ . At the other end of the hand arm 623, two oval pieces 624, 624 are rotatably supported around a rotation center O ₁ . A contact ring 625 having a circular cross section which is in contact with the axis O ₁ is rotatably mounted between the two oval pieces 624 and 624 so that the axis O ₂ serves as a rotation axis. Matching of the contact surface between the axis O ₂ and the contact ring 625 and the oval piece 62
Due to the rotatability around the axis O ₂ of the lens 4, the contact point P when the contact ring 625 contacts the edge of the processing lens LE as shown in FIG. 20, its contact point P coincides with the axis A of the arm 621. It matches the radius vector l. Therefore, for example, the contact wheel 6
It is possible to eliminate the error Δ that occurs when 25 is fixedly supported by the hand arm 623 without providing the oval piece 624 as shown by the chain double-dashed line in the figure.

A central arm portion 626 of the hand arm 623.
A spring 627 is hung between the arm and the arm 621,
The hand arm 623 always acts so as to be pulled upward. The hand arm 623 is kept horizontal by a stopper piece 628 formed at the tip of the arm 621.
As shown in FIG. 21, when the contact lens 625 is cut into the cut oyster due to the large breakage of the processed lens LE and the contact ring 625 falls into the cut oyster as shown in FIG. Contact wheel 625
The purpose of this is to prevent damage. That is, when a force exceeding the limit is applied to the hand arm 623, the hand arm 623 pivots about the axis O ₃ against the tension of the spring 627. When the spring 627 crosses the axis B connecting the axis O ₃ and the fixing point of the spring 627, the hand arm 623 swivels rapidly by the tension of the spring 627 and retracts from the lens LE to prevent self-damage. At the lower end of the suspension base 613, FIG.
As shown in FIG. 8, the detection head 6 of the magnetic encoder 615 is
15a is attached, and the scale 615b planted in the base arm 601 is inserted. With this configuration, the movement amount of the lens radius vector measuring member 620 is detected, and accordingly, the radius vector ρ ′ _i (i = 1, 2, 3, ...
.., N) is measured.

Next, the structure of the lens surface shape sensor for obtaining the lens edge thickness and the bevel curve value will be described.
As shown in FIG. 17, the moving frame 610 is provided with two parallel guide rails 630 and 630, and the moving stage 63 is slidable on the rails 630 and 630.
1, 632 and free stages 633 and 634 are attached. Moving stage 631 and free stage 63
3 are connected by springs 635 and 635. Similarly, the moving stage 632 and the free stage 634 have springs 636,
They are connected by 636. Moving stages 631 and 632
A feed screw 638, which is driven to rotate by a feeler motor 637 including a pulse motor, is screwed into the shaft, and the feed screw 638 has screw directions opposite to each other with the central portion as a boundary. The rotation of the screw 638 causes the moving stages 631 and 637 to move in opposite directions.

Pins 640 and 640 are implanted in the moving stages 631 and 632, respectively, and these pins are mounted on the moving frame 610.
It is used to activate 1,642. That is, FIG.
7, the pin 641 turns on the micro switch 641 and it is detected that the moving stages 631 and 632 are located at the initial position which is the maximum separation state. When the feeler motor 637 is rotated to reduce the distance between the moving stages 631 and 632, the pin 64
0 activates the micro switch 642, and it is detected that the state is the minimum separation state, and the detection signal stops rotation of the feeler motor 637.

A feeler arm 650 is attached to the front end of the free stage 633, and the tip end of the feeler arm 650 is attached to the axis A of the arm 621 of the lens radius sensor 620.
It is stretched in parallel with. A feeler 651 is rotatably supported by a bent portion of a tip end of the feeler arm 650. The contact edge 651a of the feeler 651 is the contact ring 6
25 ridge lines, that is, the rotation axis O ₁ of the oval piece 624. Similarly, a feeler arm 652 is attached to the front end portion of the free stage 634, and a feeler 653 is rotatably attached to the tip bending portion thereof. The magnetic encoder 6 is mounted on the central wall 660 of the moving frame 610.
Detection heads 661 a and 662 of the reference numerals 61 and 662, respectively.
a is attached to the scale 661b, 662
b is attached to the free stages 633 and 634, respectively. Accordingly, the movement amount of the free stage 633, that is, the movement amount of the feelers 651 and 653 can be detected. A push solenoid 671 is attached to the movable table 603 as shown in FIG. This solenoid 671 is excited when the hand arm 623 of the lens radius measuring device 620 and the feelers 651 and 653 approach a predetermined radius direction distance, and the suspension base 613 is separated to retract the hand arm 623. It acts to let you.

Further, the carriage 2 is formed with an opening 680 for allowing the tip of the lens radius sensor 620 and the feeler of the lens surface shape sensor to move toward and away from the lens side. A shielding plate 681 is provided to prevent grinding water from entering the lens measuring device through the opening 680 during lens grinding. The shield plate 681 is attached to a ring 683 rotatably fitted on the lens rotation shaft 28 via an O-ring 682. When the lens rotation shaft 28 is rotated in the direction of arrow 684 in order to measure the lens radius, etc., the ring 683 also rotates the shielding plate 681 at that time by the frictional force of the O-ring 682, unblocks the opening 680, and rotates further. Then, the shield plate 681 comes into contact with the protruding portion 686 formed on the carriage 2 and is prevented from further rotating. After that, the lens LE can be rotated by rotating only the lens rotation shaft 28 against the frictional force of the O-ring 682. Conversely, when the lens rotation shaft 28 is rotated in the direction of arrow 685 during lens grinding, the shield plate 681
Is rotated at the same time to block the opening 680 again, and the projection 687 formed on the carriage 2 is brought into contact with the opening 680 to prevent the subsequent rotation. Therefore, the opening 680 is continuously blocked.

Electric Control System Based on FIG. 22, the structure of the electric control system of this embodiment having the above-mentioned mechanical structure will be described with a block diagram. The encoder 615 of the lens radius sensor 620 and the encoders 661 and 662 of the lens surface shape sensor are the counter circuits 8 respectively.
It is connected to 20, 821 and 823. The detection output from each encoder is the counter circuit 820, 82.
1, 823, and the result is calculated by the arithmetic control circuit 810.
Is input to. Further, the photo sensor unit 427 and the micro switches 641, 642 and 244 are also connected to the arithmetic control circuit 810. Feeler motor 637,
Lens radius sensor motor 605, lens rotation axis motor 21, carriage movement motor 60, contact stop motor 42
0 and the grinding pressure motor 432 are the motor controller 824.
It is connected to the. The motor controller 824 receives the control command from the arithmetic and control circuit 810 and outputs to the motor how many pulses from the pulse generator 809.
That is, it is a device for controlling the rotation speed of each motor. The grindstone motor 5 is driven by an AC power supply 826,
The rotation / stop control is controlled by a switch circuit 825 controlled by a command from the arithmetic control circuit 810.

The arithmetic control circuit 810 is, for example, a micro processor.
It is composed of a sessa, and its control is a program memory 814.
It is controlled by the sequence program stored in.
The arithmetic control circuit 810 has an input device 2000 and a later-described input device 2000.
The display device 1000 is connected. Also, the arithmetic control
The measurement data of the lens, which has been arithmetically processed in the path 810, is the lens
It is transferred to and stored in the data memory 827. Arithmetic control
The circuit 810 also controls the frame shape measuring system 800.
It Next, the electrical system of the frame shape measuring device system 800
The configuration will be described with reference to FIG. Driver times
Paths 801 to 804 are the X-axis motor 206 and Y, respectively.
Axis motor 224, sensor arm rotation motor 301,
It is connected to the guide shaft rotation motor 209. driver
Reference numerals 801 to 804 are under the control of the arithmetic control circuit 810.
According to the number of pulses supplied from the pulse generator 809
The rotation drive of each pulse motor is controlled. Reading
The read output of the pad 313 is counted by the counter 805.
Is input to the comparison circuit 806, and the reference value generation circuit 807
And the variation amount of the signal corresponding to the radial variation range a.
It When the count value is within the range a, the counter 805
The count value and the number of pulses from the pulse generator 809 are arithmetically controlled.
In the control circuit 810, the radial information (ρ _n, Θ_n) Is converted to
Input to the frame data memory 811 and stored here.
It Amount of change in output of counter 805 from radius change range a
Is large, the arithmetic control circuit 810 sends a signal to that effect.
The electromagnetic device of the spring device 315 is received through the driver 808.
Energize the Gnet 318 and move the feeler 356.
Block and stop the pulse supply to the driver 804.
Stop the rotation of the motor 301.

Input Device and Display Device As shown in FIG. 24, the input device and the display device of this embodiment are constituted by sheet switches, and include a main switch 2100, a function key 2200, an input switch group 2303, and two systems. Start switch 240
1, 2402 and a stop switch 25 for temporarily stopping the drive
00 and. Here, the function key 22
00 is a pump switch 2201 for supplying only grinding water; a grindstone switch 2 for rotating only a grindstone
202; a handrail switch 2203 for instructing the supply of grinding water for the rotation of a grindstone for handrail processing; either direct machining for measuring the lens frame shape of the frame and processing based on this, or copying processing using a template Processing model selection switch 2204 for selecting whether to select whether to measure the lens frame shape of only one eye of the frame or the shape of the binocular lens frame with a frame shape measuring device. Binocular-one-eye selection switch 2206 for selection; PD or FPD is input when the horizontal positional relationship between the pupil and the frame geometric center is input,
Alternatively, a selection switch 2207 for selecting whether to input the relative amount (shift amount); a grinding pressure intensity change switch 2
208; and a selection switch 2209 for selecting whether beveling or flat machining is performed during template processing. The input switch group 2303 includes a ten-key input switch 2300, a ten-key input cancel switch 2301, and a memory switch 2302 for storing the input. By the way, the operating state of these switches is determined by the pilot lamp 260 provided for each of them.
Displayed by lighting 0. The display device 1000 is shown in FIG.
As shown in FIG. 2, a dot matrix liquid crystal element is formed by a controller 1400 that converts a signal for driving the liquid crystal display 1100 based on a calculation result from the calculation control circuit 810 and input data from the input device 2000 and a signal from the controller. X to drive the X row of
The driver 1200 and the Y driver 1300 for driving the Y column are included.

Description of Operation of Apparatus Next, the operation of the above-described lens grinding apparatus will be described with reference to the flowchart of FIG. Step 1-1: After turning on the main switch 2100, first, the machining type selection switch 2204 is used to directly measure the lens frame of the frame to select direct machining or machining with a template. Step 1-2: The operator decides whether the bevel position setting is automatic or manual, and if it is automatic, the selection switch 220
If the "auto" side of 5 is manual, press the "manual" side. Step 1-3: The arithmetic control circuit 810 is the input device 200.
The selection command of the 0 selection switch 2204 is read and either the direct machining sequence program or the template sequence program is read from the program memory 814. 1) Direct machining [The operation sequence when direct machining is selected will be described below. ] Step 1-4: The operator measures only the lens frame shape of one eye of the frame, and the other eye processes using the inverted data, or measures the lens frame shape of both eyes and measures the respective data. The binocular-single-eye selection switch 2206 is used to select whether to perform the original processing. Step 1-5: The worker inputs PD and RPD, or a relative amount (approach amount) of both when inputting the horizontal positional relationship between the pupil center of the wearer's eye and the geometric center of the frame. Decide what to do. When inputting PD or FPD, the "PD" side of the selection switch 2207 is pushed, and when inputting the amount of shift, the "shift" side is pushed and inputted.

Step 2-1: The frame is set so that the lens frame 501 of the frame 500 is fixed by the frame holding rod 152 of the frame holding device section 100. The frame holding device unit 100 in which the frame 500 is set is inserted from the opening 100 of the device housing 1 and temporarily held by the hands 211 and 212 of the supporting device unit 200A. Step 2-2: The lens frame left / right eye determining device 240 determines whether the lens frame 501 set on the measuring unit 300 of the lens frame shape measuring device is for the left eye or the right eye. That is, when the micro switch 244 of the determination device 240 is turned off, the arithmetic and control circuit 810 determines that the lens frame located on the measurement unit 300 is for the left eye. On the other hand, if the micro switch 244 of the determination device 240 is still ON even when the frame holding device section 100 is set on the supporting device section 200, the arithmetic control circuit 810 determines that the lens frame positioned on the measuring section is the right eye. It is determined to be for use. Step 2-3: Judgment result of the judgment device 240, that is,
As shown in FIG. 25, the liquid crystal display 1100 displays the right eye lens frame or the left eye lens frame by characters 1113. Step 2-4: The operator operates the chucking handle 29 to chuck the lens LE to be processed by the lens rotation shaft 28 of the carriage 2. At this time, the suction plate is sucked so that its center coincides with the optical center of the lens LE to be processed. That is, the optical center of the chucked lens LE to be processed is set so as to coincide with the lens rotation axis.

Step 2-5: The operator inputs the PD value of the wearer according to the prescription with the ten-key switch 2300, and presses the memory switch 2302 after the input is completed. The arithmetic control circuit 810 temporarily stores the data in the internal memory and displays the input data on the “PD” display section 1101 of the display. Next, the operator inputs the FPD value with the ten-key switch 2300 and presses the memory switch 2302 after the input is completed. The arithmetic control circuit 810 temporarily stores the data in the internal memory, and the controller 1
The input data is displayed on the “FPD” display unit 1102 of the display 1100 via 400. Subsequently, the operator determines the amount of upward displacement U of the optical center of the lens LE (see FIG. 13).
Is input using the ten-key switch 2300, and the memory switch 2302 is pressed after the input is completed. As a result, the arithmetic control circuit 81
0 stores the input data and displays it on the “UP” display unit 1103 of the display 1100. However, when "shift" is selected in step 1-5, the relative amount (shift amount) of PD and FPD is input by the ten-key switch. Step 2-6: The operator judges the material of the lens to be processed, and when it is a glass lens, the “G start” 110 displayed on the liquid crystal display 1100 shown in FIG. 24.
5 and the switch 2402 below the "P start" 1106 when the lens to be processed is a plastic lens.

Step 2-7: The arithmetic control circuit 810, which has received the ON signal of the memory switch 2302 upon completion of the input of the shift amount in the previous step, causes the frame shape measuring apparatus 200 to operate.
Of the frame holding device section 100 by driving the motor 224 of
Hold hands 211 and 212, and then the motor 20
9 is driven to set the frame at the measurement position. Then, the motor 301 is rotated and the sensor arm 302 is rotated. The output from the read head 313 of the encoder for each unit rotation angle is counted by the counter 805, and the lens frame radius information (ρ _n , θ _n ) is calculated from the sensor arm rotation angle θ _n and the radius measurement value ρ _n from the counter 805. Ask for. This measurement data is stored in the lens frame data memory 811 as a preliminary measurement value because the rotation center of the sensor arm 302 does not always coincide with the geometric center of the lens frame. Step 2-8: Based on the lens frame radius vector information (ρ _n , θ _n ) obtained in the preliminary measurement in the previous step, and the PD data, FPD data, and the upper alignment amount U input in step 2-2, According to the equation (2), the optical center position O _s (X _s ,
Y _s ) is calculated by the calculation control circuit 810. Step 2-9: The operation control circuit 810 determines the calculated O
_{Based on s} (X _s , Y _s ), the Y-axis motor 224 and the X-axis motor 206 are driven through the drivers 801 and 803 of the frame shape measuring device to move the right-eye lens frame of the frame 500 to detect the sensor. The rotation center of the arm 302 is O _s
Match (X _s , Y _s ). Step 2-10: The sensor arm 302 is rotated via the driver 804 to measure the radius vector information of the lens frame again, the output from the read head 318 of the encoder is counted by the counter 805, and the count value and the motor 301
Both the number of pulses from the pulse generator 809 for rotating the lens are input to the arithmetic control circuit 810, and new radial information ( _rs ρ _n , _rs θ _n ) of the lens frame is obtained from the both data,
This is stored in the lens frame data memory 811. This is called the actual measurement of the lens frame.

Step 3-1: The arithmetic control circuit 810 is
Lens rotation axis motor 2 via the data controller 824
1 to rotate the lens rotation shaft 28 in the direction of arrow 684.
Roll over. This shields the opening 680 of the shield plate 681.
solve. Next, the arithmetic control circuit 810 causes the lens frame data
The lens frame data based on the actual measurement stored in the memory 811.
Data (_rsρ_n, _rsθ_n) (N = 1, 2, 3, ...
N) The first information (_rsρ₁,_rsθ ₁) Memory
Read from 811_rsθ₁Based on the lens rotation axis 28
Stop at that position. The lens radial center mode
Radius value_rsρ₁Pulse number corresponding to
It is supplied from the raw container 809, and the moving frame 610 is processed by a raw
Move to the LE side. To advance the moving frame 610
Therefore, the arm 621 of the lens radius sensor 620 is also fixed.
The contact ring 6 is moved forward by the pulling force of the torque spring 614.
25 contacts the edge surface of the unprocessed lens LE. At this time
The moving position of the arm is detected by the encoder 615.
Is counted by the counter 820, and the count value is arithmetically controlled.
In circuit 810_rsθ₁Radius of lens LE on the meridian (half
Diameter) R₁And calculated in the lens data memory 827
(R₁,_rsθ₁) (FIG. 28).

Next, the feeler motor 637 is rotated.
And a fee for moving the moving stages 631 and 632.
The motor 637 is connected to the pin 640 of the moving stage 632.
Turns on the micro switch 642,
Rotation through path 810, motor controller 824
Can be stopped. Of the moving stages 631 and 632
It is connected to them by springs 635 and 636 by movement.
Free stages 633 and 634 are rails 630 and 63
Slide on 0. This makes feelers 651 and 653
Is the radial value on the front and back of the lens_rsρ₁At the position of
Contact. Positions of feelers 651 and 653 at this time
Are detected by encoders 661 and 662, respectively, and
To the arithmetic control circuit 810 via the input terminals 821 and 822.
value_fZ₁, _bZ₁Is input as the arithmetic control circuit 810.
Will transfer this to the lens data memory 827 for storage.
It Similarly in the following, the radial angle_rsθ_NLens radius at
R_N, Feeler position_fZ_N, _bZ_NAsk for all
information(_rsθ₁, R₁,_fZ₁,_bZ₁) (I = 1, 2,
3, ..., N) is input to the lens data memory 827.
And memorize. This makes feelers 651 and 653
As shown in FIG. 28, the lens frame radius vector information (_rsρ_n,_rsθ
_n) Is traced as a locus T on the unprocessed lens LE.
It will be. Step 3-2: The arithmetic control circuit 810 executes the above step
Radius R of the unprocessed lens LE obtained in 3-1_iAnd its
Radial angle θ_iLens frame radius ρ at_iTo compare. R₁
<Ρ_iIf the desired lens is ground,
It is determined that a lens having a frame shape cannot be obtained, and the display device
1000 gives a warning on the display 1100
Both stop execution of the subsequent steps. R₁≧ ρ_iof
If so, go to the next step. Step 3-3: The arithmetic control circuit 810 uses the lens data
Feeler position information stored in memory 827 (_fZ
_i,_bZ_i), As shown in FIG.
Diameter ρ_A, Ρ_BLocation information of each feeler (_fZ_A,
_bZ_A), (_fZ_B,_bZ

[0040]

[Outer 1]

[0041] From the front center of curvature located _f Z _O and the rear center of curvature located _b Z _O

[0042]

[Equation 1]

[0043]

[Equation 2]

[0044]

[Outside 2]

[0045]

[Outside 3]

The curve width C _b of

[0047]

[Equation 3]

(Where n is the refractive index of the lens)

[0049]

[Outside 4]

From the information ( _rs ρ _n , _rs θ _n ), the total radial angle θ _n
The edge thickness Δ _n for each unit angle over

[0051]

[Equation 4]

This value obtained from the lens data memory 82
Input to 7 and memorize. Step 3-4: The arithmetic control circuit 810 determines the lens frame data.
From the memory 811, the maximum edge thickness Δ_maxAnd the minimum edge thickness Δ
_miNLens frame radius information with_rsρ_M,_rsθ_M)When(_rs
ρ_N,_rsθ _N) Is selected. Next, the predetermined
Based on the bevel shape G of the Gen wheel 3b, bevel processing
The bevel apex P of the rear lens is the edge thickness of the front side: rear side = 4:
Bevel top position so that it comes to position 6_eZ_M,_eZ_NTo

[0053]

[Equation 5]

Is calculated as Next, the bevel curve value C _P is calculated based on the obtained bevel apex positions _e Z _M and _e Z _N.
Is obtained by the same solution as the above equations (4) and (7),
From the bevel curve value C _P and the edge thickness Δ _n , the bevel apex position _e Z _i (i = 1, 2, 3, ..., N) for each radius angle is obtained, and these are input to the lens data memory 827. Remember. Step 3-5: As shown in FIG. 25, the bevel shape at the maximum-minimum edge thickness obtained in step 3-4 is
Liquid crystal display 1100 with auto bevel cross-section 111
Display as 0. Here, the solid line shows the bevel shape with the maximum edge Δ _max , and the broken line schematically shows the bevel shape with the minimum edge Δ _{min so} that the respective bevel vertices coincide with each other. Step 3-6: If "manual" input is made in step 1-2, go to step 3-7. If "auto" input, go to step 4-1.

Step 3-7: When the operator inputs "manual" in the previous step 1-2, the arithmetic control circuit 8
Reference numeral 10 causes the liquid crystal display 1100 of the display device 1000 to display the characters “curve” and “shift amount” as shown in FIG. 25, and prompts the operator to input each desired numerical value. The operator operates the numeric keyboard 2300 to input a desired curve value. The input data is displayed in the “curve” column of the liquid crystal display 1100, and the operator confirms it and presses the “memory” switch 2302 to store the input data in the internal memory of the arithmetic control circuit 810. Next, the operator presses the "close" switch of the switch 2207 and then inputs the desired close amount of the bevel apex obtained in the previous steps 3-5 and 3-6 by operating the ten-key switch 2300 in millimeter units. . The input data is the liquid crystal display 1100.
Is displayed on the “approach” display unit 1112.

Step 3-8: Simultaneously with the above operation, the arithmetic control circuit 810 performs Step 3- based on the input shift amount.
The bevel apex position of the minimum edge obtained in 5 is shifted by the amount of deviation, and each radial angle _rs is calculated based on the input bevel curve value.
The bevel position information _e Z _i is obtained for θ _i (i = 1, 2, 3, ... N), and both the bevel vertex positions of the minimum bevel and the maximum bevel are graphically displayed on the manual bevel shape display unit 1120 of the liquid crystal display 1100. indicate.
Here, the solid line shows the maximum bevel shape and the broken line shows the minimum bevel shape. In the example of FIG. 25, the bevel shape is displayed when the bevel apex is moved backward and the bevel curve is small (the radius of curvature is large) as compared with the case of auto. If the operator sees the bevel shape display and finds that the bevel position is unsatisfactory, he / she inputs the displacement amount and the bevel curve again, causes the arithmetic control circuit 810 to compute the bevel shape based on the new input, and displays it on the display device. . The finally determined bevel position information _e Z _i is stored in the lens data memory 827. Step 3-9: The operator sees the automatic or manual bevel shape display 1110, 1120 and, when selecting the automatic bevel, turns on the start switch 2401 below the display. When selecting manual bevel, press the start switch 2402 below the display.
N

Step 4-1: The arithmetic control circuit 810
In step 2-6, it is determined which start switch receives the signal. In the case of a command from the "G start" side selection switch 2401, go to the next step 4-2.
In the case of a command from the "P start" side selection switch 2402, the process proceeds to step 4-3. Step 4-2: The arithmetic and control circuit 810 causes the lens frame radius vector information ( _rs ρ stored in the lens frame data memory 811).
_n , _rs θ _n ) with maximum radial _rs ρ _max ( _rs ρ _max ,
_rs θ _max ) is read. Subsequently, the lens rotary shaft motor 21 is rotated via the motor control circuit 824,
The lens LE is continuously rotated.

Next, the arithmetic control circuit 810 is a switch circuit.
825 is turned on and the grindstone motor 5 is rotated. Arithmetic system
The control circuit 810 is the radial_rsρ_maxBased on
Rotating the rotor 420, a horizontal cutaway view of the stopper member 422
422b is a distance d from the grindstone surface of the rough grindstone 3a_maxThe height of
To lower. Where d_maxIs the maximum lens frame radius_rsρ
_maxAnd the radius r and d of the ring 27a_max=_rsρ_max-R: Has the relationship of (9). For lowering of this stopper member 422
As a result, the carriage 2 descends and the lens LE to be processed is a rough grindstone.
It is ground by 30. Either the lens LE to be processed
The radius of_rsρ _maxRing 27a when ground to
Abuts against the stop member 422 and swings it to block light.
The rod 429 blocks the light path of the photo sensor unit 427.
(See FIG. 2), the cutoff signal is input to the arithmetic control circuit 810.
Force The arithmetic control circuit 810 includes a lens rotation shaft 28a,
While continuing to count the number of pulses corresponding to one rotation of 28b,
The cutoff signal from the photo sensor unit 427 is input to
If not, the entire circumference of the lens to be processed is_rsρ_maxof
It is judged that it has been processed into a radius vector.

Subsequently, the arithmetic and control circuit 810 indicates the lens frame data.
From the memory 811 (_rsρ₁,_rsθ ₁) Read the data
Including_rsθ₁Lens rotation axis motor 2 based on the data of
1 is rotationally controlled to rotate the lens LE to be processed. Next
To_rsρ₁Based on the radial data of
0 to control the stopper member 422 to d₁Descended to the height of
Let As shown in FIG. 31, generally, the stopper member 42 is
Height d of 2_iIs the radial_rsρ_iAnd the ring r is
As calculated from equation (8) d_i=_rsρ_i-R (i = 1, 2, 3, ..., N) ... (8) ′. By lowering this stopper member 422,
The lens LE to be inspected is further rough ground,_rsρ_iThe radius of
Photo sensor unit 427 shuts off again when ground
The signal is input to the arithmetic control circuit 810. Arithmetic control circuit 8
10 receives the signal, the lens frame data memory 81
From 1 (_rsρ₂,_rsθ₂) Is read as data,_rs
θ₂Rotate the lens LE to the angle of_rsρ₂Based on
Stop member 422 with height d₂Down to lens LE
Grind. Similarly, ((_rsρ_N,_rsθ_N) Up to Ren
By processing the LEs, the lens LE to be processed becomes
Frame data (_rsρ_i, _rsθ_i) Is ground to
It

Step 4-3: Carriage moving motor 60 to position the lens on the plastic rough grindstone
Then, rough grinding is performed in the same manner as in step 4-2. Step 4-4: The arithmetic control circuit 810 controls the contact stop motor 420 via the motor controller 824 to raise the carriage 2 to separate the processing lens LE which has been subjected to rough grinding from the rough grinding stone 3a, and then the carriage moving motor 60.
Is controlled to position the lens LE on the bevel grindstone 3b.

Next, the arithmetic control circuit 810 outputs the lens frame radius vector information ( _rs ρ _i , from the lens frame data memory 811 ₎ .
_rs θ _i ) (i = 1, 2, 3, ... N) are read in sequence,
In addition, the bevel position information _e Z _i corresponding thereto is sequentially read from the lens data memory 827, and based on these data, the lens rotation axis motor 21, the contact stop motor 420,
By controlling the carriage movement motor 60, the rough-ground lens is beveled by the bevel grindstone 3b. Step 4-5: After the beveling is finished, the arithmetic control circuit 81
0 controls the stopper motor 420 to return the carriage 2 to the fixed position on the bevel grindstone, and the switch 825 is turned off.
Set to F and stop the grindstone motor 5. Next, the arithmetic control circuit 810 controls the lens rotation shaft motor 21 to rotate the lens rotation shaft 28 in the direction of arrow 684 in FIG. As a result, the light blocking plate 681 rotates and the opening 680 is opened.
As shown in FIGS. 32 and 33, the arithmetic control circuit 810 rotates the lens radius sensor motor 605 to move the moving frame 610 forward. Along with this, the lens radius sensor 620 is advanced by the tensile force of the constant torque spring 614, and the contact ring 625 abuts on the edge of the beveled lens LE. Since the lens rotation shaft 28 is rotated, the encoder 615 uses the radial information ( _rs ρ _i ^' , _rs θ _{i of the} lens LE _).
^' ) (I = 1, 2, 3, ..., N) is detected, and this is detected by the arithmetic control circuit 8 via the counter 820.
Measured at 10.

Step 4-6: The arithmetic control circuit 810 calculates the lens frame radius vector information ( _rs ρ _i , _rs θ _i ) stored in the lens frame data memory 827 and the processed lens measured in the previous step 4-5. Lens radius information ( _rs ρ _i ^' ,
_rs θ _i ^' ) and determine whether they match. If they match, the process proceeds to step 4-8, and if they do not match, the process proceeds to step 4-7. Step 4-7: When _rs ρ _i ^′ is larger than _rs ρ _i , the height d _i of the abutting member 422 is lowered by a small amount, and the process returns to step 4-4 to perform the beveling. Step 4-8: If it is determined in step 4-6 that _rs ρ _i and _rs ρ _i ^′ match, the initial state is restored.
After that, remove the lens that has been processed from the carriage.

Step 6-1: The arithmetic control circuit 810
It is determined whether or not the grinding process has been completed for the binocular lenses, and if not completed, the process proceeds to step 5-2. When it is determined to be completed, all steps are completed. Step 6-2 and Step 6-4 The arithmetic control circuit 810 determines whether the binocular measurement or the monocular measurement is selected in Step 1-4, and determines “one eye”.
If is selected, the process proceeds to the next step 6-3.
When "Binocular" is selected, "Please set the other lens frame of the frame" is displayed on the liquid crystal display 1100 of the display device 1000, and the operator sets the lens frame 501 of the other eye. It The above-mentioned step 2-
After performing steps 2 to 2-4, the process proceeds to step 2-7. Step 6-3: When step 1-4 is a one-eye measurement command, the arithmetic control circuit 810 uses the right eye lens frame measurement data ( _rs ρ _n , _rs θ _n ) obtained in step 2-6 as polar coordinates-orthogonal coordinates. After conversion, the Cartesian coordinate data ( _rs X _i , _rs
Y _i ) (i = 1, 2, 3, ..., N)

[0064]

[Equation 6]

As the new lens frame detection data (l _s X
_i , l _s Y _i ) is obtained. X _s -Y _s coordinates Y _s this data with the origin of the optical center O _s' as shown in FIG. 14
Axis obtained by inverting the lens frame shape of the right eye as a symmetrical axis, again orthogonal coordinate this - to polar coordinate conversion (l _s ρ _n, l
_s θ _n ) is stored in the lens frame data memory 811 as the lens frame shape of the left eye. The following steps 2-4 and 2-
After executing 6, the process proceeds to step 3-1. 2) In the case of template processing If it is determined in step 1-2 that template processing has been selected, grinding processing is executed according to the following steps.

Step 5-1: Template SP in which the frame 500 is pre-molded on the template holder 27b of the carriage 2.
(See FIG. 34). Step 5-2: The lens LE to be processed is chucked by the lens rotation shaft 28 of the carriage 2. Step 5-3: The operator judges the material of the lens to be processed, and when the glass is glass, it is displayed as "G start", and when it is plastic, it is displayed as "P start". Push. Switch 24
If 01 is turned ON, go to step 5-4 and switch 24
If 02 is turned on, the process proceeds to step 5-5. Step 5-4: The arithmetic control circuit 810 switches the switch 82.
5 is turned on to rotate the grindstone motor 5 to rotate the grindstone 3 at high speed. Next, the arithmetic control circuit 810 rotates the lens rotation shaft motor 21 to rotate the lens LE at a low speed. Further, the stopper motor 420 lowers the arc-shaped portion 422a of the stopper member 422 to the same height as the glass rough grinding stone 3a under the control of the arithmetic control circuit 810. As a result, the rough grinding of the lens LE is started. Photo sensor 42
When the cutoff signal from 7 is continuously output for one rotation of the lens rotation shaft 28, the arithmetic control circuit 810 determines that the rough grinding is completed, and controls the stopper motor 420 to move the carriage 2 to the fixed position. After raising, switch 825 is turned off
Then, the grindstone 3 is stopped. Step 5-5: The lens LE to be processed is positioned on the plastic rough grindstone 3C by driving the carriage moving motor 60, and thereafter, rough grinding is performed in the same manner as in Step 5-4 described above.

Step 5-6: The operator inputs with the selection switch 2209 whether the lens after rough grinding is beveled or smoothed. Step 5-7: If beveling is selected in step 5-6, the process proceeds to the next step 5-8, and if smoothing is selected, the process proceeds to step 7-1. Step 5-8: The arithmetic and control circuit 810 rotates the lens rotation shaft 28 by rotating the motor 21 to open the opening 680 and controls the lens radius sensor motor 605 as shown in FIGS. 35 and 36. The moving frame is moved forward, and the contact ring 625 is brought into contact with the edge of the rough-ground lens LE by the tensile force of the constant torque spring 614.

[0068]

[Outside 5]

Is measured and the data is input to the arithmetic control circuit 810 via the counter 820.

[0070]

[Outside 6]

The motor 605 is controlled so that the fillers 651 and 653 come to the position of (1) and the motor 637.
Control the free stages 633 and 634 to the free state.

[0072]

[Outside 7]

[0073]

[Outside 8]

Thereafter, the above steps 3-3 to 3-9 and 4-4 are executed to complete the processing. Step 7-1: When the operator selects smoothing in step 5-6, the arithmetic control circuit 810 reads the fact in step 5-7, and the carriage moving motor 60 is rotated to move the lens LE to be processed. It moves to the smooth grindstone 3d, and then the carriage 2 is lowered to perform the flat machining. Automatic Template Processing Detection Device In the above-described embodiment, selection between direct machining and template processing is performed by the command of the selection switch 2204.
5 and 16 show examples in which the selection can be automatically instructed by mounting the template. A bearing 710 is attached to the arm 34 of the carriage. The bearing 710 has a slot 711 formed along its longitudinal direction. Bearing 7
A stopper lever 712 is fixed to one end of the shaft 10, and a shaft 714 having a tapered portion 713 formed on the other end thereof is rotatably fitted and inserted. A pin 715 is planted on the outer circumference of the shaft 714. The pin 715 is normally in contact with the end surface of the bearing and prevents the shaft 714 from moving in the axial direction. A shaft 714 is further provided at the end of the shaft 714 with an arrow 716 in FIG.
A spring 718 that constantly pulls in the direction of is hooked. Since this spring 718 is twisted and hooked in the direction of arrow 716, a force is applied to rotate shaft 714 in the direction opposite to arrow 717. The contact wheel 720a of the microswitch 720 is in contact with the tapered portion 713. The micro switch 720 is connected to the arithmetic control circuit 810.

As shown in FIG. 16, the stopper lever 712 is provided with a notch 712a, and the stopper 71
When 2 is rotated, the center pin 28a of the pin for holding the template SP, which is planted at the end of the lens rotation shaft 28, is covered from above, and works to prevent the template SP from coming off. Next, the operation of this embodiment will be described. When processing the template, the operator attaches the template SP to the template holding pin of the lens rotation shaft 28 of the carriage 2. Next, as shown in FIG.
In the case of rotating in the clockwise direction, the notch 712a rotates until the central pin 28a abuts. When the pin 715 comes to the position of the slot 711, the shaft 71 is pulled by the tensile force of the spring 718.
4 is moved in the direction of arrow 716. By the movement of the shaft 714, the micro switch 720 is turned on by the taper portion 713, and the arithmetic control circuit 810 can automatically receive the command for the template processing.

[Brief description of drawings]

FIG. 1 is an external perspective view showing a mechanical portion of a lens grinding device according to the present invention with one end cut away.

FIG. 2 is a sectional view taken along line II-II ′ of FIG.

FIG. 3 is an external perspective view of a frame shape measuring device.

FIG. 4 is a perspective view of a frame holding device section.

FIG. 5 is an explanatory view showing the operation of FIG.

FIG. 6 is an explanatory view showing the operation of FIG.

FIG. 7 is a vertical mid-sectional view of the frame holding device section.

FIG. 8 is a vertical midline sectional view showing the structure of a spring member.

FIG. 9 is a schematic diagram showing a relationship between a support device section and a sensor section.

FIG. 10 is a cross-sectional view of FIG.

FIG. 11 is a partially cutaway side view showing a sensor section.

FIG. 12 is a schematic diagram showing a relationship for obtaining a geometric center and an optical center of a lens frame from measured values.

FIG. 13 is a schematic diagram showing a relationship between frames PD and PD.

FIG. 14 is a schematic diagram showing a relationship between right-eye lens frame data and left-eye lens frame data.

FIG. 15 is a view showing an automatic detection device for template processing.

FIG. 16 is a diagram showing an automatic detection device for template processing.

FIG. 17 is a plan view of a lens measuring device.

FIG. 18 is a sectional view taken along line XII-XII ′ of FIG.

FIG. 19 is a diagram showing the configuration and action of the tip of the lens radius sensor.

FIG. 20 is a view showing the configuration and action of the tip of the lens radius sensor.

FIG. 21 is a view showing the configuration and action of the tip of the lens radius sensor section.

FIG. 22 is a block diagram showing an electric system of the present invention.

FIG. 23 is a block diagram showing an electric system of the frame shape measuring apparatus.

FIG. 24 is a diagram showing a display device and an input device.

FIG. 25 is a diagram showing another display example of the display device.

FIG. 26 is a flowchart showing an operation sequence of the present invention.

FIG. 27 is a schematic view showing the operation of the lens measuring device.

FIG. 28 is a schematic view showing the operation of the lens measuring device.

FIG. 29 is a schematic diagram showing the relationship between the lens curve and the edge thickness.

FIG. 30 is a schematic diagram showing the relationship between the lens curve and the edge thickness.

FIG. 31 is a view showing a relationship between a carriage and a stopper member.

FIG. 32 is a schematic diagram showing the operation of the lens measuring device.

FIG. 33 is a schematic view showing the operation of the lens measuring device.

FIG. 34 is a view showing a relationship between a carriage and a stopper member.

FIG. 35 is a schematic view showing the operation of the lens measuring device.

FIG. 36 is a schematic view showing the operation of the lens measuring device.

[Explanation of symbols]

 1 Device Housing 2 Carriage 3 Grinding Stones 28a, 28b Lens Rotation Axis 200 Frame Shape Measuring Device 300 Measuring Unit 601 Base Frame 603 Moving Base 610 Moving Frame 620 Lens Radius Sensor 623 Hand Arm 624 Oval-shaped Piece 625 Contact Wheel 631, 632 Moving Stage 651, 653 Feeler 810 Operation control circuit

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshiyuki Hatano 75-1 Hasunumacho, Itabashi-ku, Tokyo Topcon Co., Ltd. (72) Inventor Hiroaki Ogushi 75-1 Hasunuma-cho, Itabashi-ku, Tokyo Topcon Co., Ltd. Within

Claims (1)

[Claims] 1. A lens rotating shaft for sandwiching a lens to be processed and rotatably supporting the lens, and a front refraction surface and a rear refraction surface of the lens to be contacted to frame the lens to be processed. The lens frame of the spectacle frame or arranged on the measurement locus of the lens to be processed having a predetermined relationship with the virtual edge locus obtained from the shape data of the lens to be processed which is processed by copying from the template having the shape of the lens frame, A feeler part having a rotatable tip, and a control for obtaining the edge thickness that will be formed after the beveling of the lens to be processed based on the detection information in the lens rotation axis direction by the feeler part. And a lens shape measuring device.