JPH06155264A - Lens shape measuring device and lens grinding device having the same - Google Patents

Abstract

(57) [Summary] [Purpose] Before the beveling of the lens to be processed, the bevel shape that will be formed after the lens is processed is displayed in a simulated form and adjusted to the desired edge thickness and bevel vertex position. And provide a method for setting an appropriate bevel vertex position. In a method of setting an appropriate bevel position for beveling a lens to be machined after rough grinding with a bevel grindstone, a first step of obtaining edge thickness information that will be formed after beveling, and an edge thickness. And a second step of obtaining the bevel apex position information for arranging the bevel apex after the beveling at a predetermined position of the bevel shape and the bevel shape information in addition to the edge thickness information obtained in the first step. A third step of graphically displaying the bevel shape based on the bevel shape information obtained in step 3, and adjusting the edge thickness information or the bevel apex position information based on the bevel shape graphically displayed in the third step. And a fourth step of setting a position to an appropriate position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spectacle lens having a lens framed in a spectacle frame, and relates to a setting method for setting an appropriate bevel position.

[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 Invention] Two important points to be noted in beveling are the bevel position at the edge and the bevel curve. Here, the bevel curve is a curve value that specifies a spherical surface formed by a bevel vertex locus connecting the vertices. Ideally, when the lens to be processed has a refractive power of +2 to -3 diopters, the bevel apex position is formed at a position of 4: 6 which is the edge thickness of each radius of motion of any lens radius. That is. However, in reality, it is extremely difficult to process such an ideal bevel apex position or bevel into a predetermined bevel curve. Because conventionally, only the bevel apex position and bevel curve depend on the operator's perception and experience, and what kind of bevel is formed on the lens to be processed can be known without actually processing. Because there is no. As a result, I often even made "trial cuts". In particular, the beveling process is the process that requires the most care because it is directly connected to the inability to frame the lens and the occurrence of burrs and cracks when the frame is framed or worn.

Another problem is that it is impossible to determine whether or not the lens after the grinding process has been processed into a size suitable for the lens frame to be framed without actually carrying out the frame framing work. That's what it means. Therefore, after finishing the grinding work,
Lens removal from the lens grinding machine, frame setting work and judgment of frame suitability, and if the processed lens is larger than the lens frame, chucking the lens to the grinding machine again, the amount of grinding for the second grinding process It required setup, re-grinding, and extremely complicated work that required skill and experience. The above-mentioned problem is that the bevel shape after beveling cannot be recognized in a simulated manner before machining, or there is no method for that.

[0005]

It is an object of the present invention to graphically display the bevel shape which will be formed after the processing of the lens before the bevel processing of the lens to be processed in a simulated form so that the desired edge thickness and the bevel vertex position can be obtained. It is to provide a method of adjusting and setting an appropriate bevel vertex position.

[0006]

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.

[0007]

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.

[0008]

【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 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-I of frame 4 in FIG.
It is the I'view 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 provided on the table portion 42.
By means of a shaft 428 rotatably fitted into the end of the shaft 6,
It is attached to the table portion 426 so as to be rotatable around 28 as a rotation center. Stop member 422 and table portion 42
A spring 470 is inserted between 6 and the spring 470.
By the action of, the stopper member 422 is always lifted upward as shown by the chain double-dashed line.

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 includes a pulse motor 432 having a feed screw 431 and a feed screw 431.
Piston 434 screwed with female screw portion 433, and cylinder 4 slidably inserted on the outer wall of piston 434.
35, and a spring 436 arranged between the cylinder 435 and the piston 434. 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 the carriage 2
The pin 43a is attached to the side surface of the carriage 43 to support the own weight of the carriage 2 by the elastic force of the spring 436.
When the piston 434 is moved up and down via the feed screw 433 by the rotation of the motor 432, the amount of compression of the spring 436 changes, and the amount of force that supports the carriage 2 also changes, so that the lens LE to be processed is ground to the grindstone 3. The pressure can be changed. Lens Frame Shape Measuring Device Next, the configuration of the lens frame shape measuring device 200 will be described with reference to FIGS. 3 to 16. 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.

The supporting device section 200A has a housing 201. The housing 201 has feet 253 and 254, and the feet 253 and 254 are slidably mounted on rails 251 and 252 attached to the housing 1 of the lens grinding apparatus. Further, the door 10a has rails 255 and 256,
When the door 10a is opened, the rails 255 and 256 are located on the extension lines of the rails 251 and 252, respectively. 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 with the vertical direction (X-axis direction of the measurement coordinate system), and the moving stage 203 is slidably mounted on the guide rails. Has been done. 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 2
Hands 211 and 212 are slidably supported by 08. Shaft holes 213 and 214 of these hands 211 and 212
Projections 213a and 214a are formed on the respective guides 213a and 214a.
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 unit 300 is composed of a sensor arm rotation motor 301, which is a pulse motor attached to the lower surface of the housing 201, and a sensor arm portion 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. The slider 350 supported by the rail 311 has a shaft hole 351 formed 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 in the movable base 153, and the projecting legs 156a and 156a of the sliders 156 and 156 are engaged with the guide grooves 155 and 155, as shown in FIG. 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, and the result is 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, as described above, 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.
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 212 holding the frame holding device section 100 by further rotating the Y-axis motor 224.
Is moved in the Y-axis direction by a certain amount, and the frame holding device unit 10
0 circular opening center point 159a and the rotating shaft 3 of the measuring unit 300
04 Approximately coincide with the center. At this time, the bevel feeler 356 contacts the bevel groove of the lens frame 501 during the movement. The initial position of the bevel feeler 356 is shown in FIG.
As shown in FIG. 10, the pin 352 a implanted at the lower end of the sensor shaft 352 is attached to the base 31 of the sensor arm portion.
The direction is regulated by abutting on the hanger 310a attached to 0. 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.

Subsequently, 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 (ρ _n , θ _n ) (n = 1, 2, 3, ...
N). Here, as described above, in the first measurement, 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 measurement point D with the minimum value in the X-axis direction (x _d, y _d), measured point having the maximum value in the Y axis direction _a (x _a, y _a) and The measured point C (x _c , y _c ) having the minimum value in the Y-axis direction is selected, and the geometric center O ₀ of the lens frame is set to O ₀ (x ₀ , y ₀ ) = (x _b + x _d / 2, y _a + y _c / 2) ... (1) and then the lens frame geometric center distance FPD of both frames of the frame 500 schematically shown in FIG. 13 which is pre-input from the keyboard 1000 described later and the pupil of the wearer's eye. From the inter-distance PD, (FPD-PD) / 2 = I, the amount I of internal deviation is determined, and the pupil U of the wearer's eye is calculated based on the amount U of upward displacement from the keyboard 1000. Position or positions to position the optical center of the uncut lens _{O s (s X 0, s} Y 0) to _{O s (s X 0, s} Y 0) = (X 0 + I, Y 0 + U) = (x b _{+ x d / 2 + Iy a} + y c / 2 + U) = obtained as _{(x b + x d / 2} + FPD-PD / 2, 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 radius vector, 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 61 is provided on the upper surface of the moving table 603.
0 is stuck. Rear wall piece 61 of moving frame 610
Two parallel rails 612 (only one of which is shown in FIG. 18) are passed between 1 and the moving base 603, and a suspension base 613 is slidably mounted on the parallel rails 612. There is. Suspension base 613 and base frame 60
A constant torque spring member 614 is disposed between the two, and the suspension table 6
At the initial stage, 13 works to make contact with the rear surface of the moving base 603. An arm 621 of the lens radius sensor 620 is fixed to the front side surface of the suspension base 613. Arm 62
As shown in FIGS. 19 to 21, a modified H-shaped hand arm 623 is provided on the cono-shaped flange 622 at the tip of the No. 1 unit.
Is attached at one end thereof so as to be rotatable around 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 surfaces of the axis O ₂ and the contact ring 625 and the oval piece 624.
The rotation flexibility about the axis O ₂ of, when the contact wheel 625 as shown in FIG. 20 is in contact with the edge of the uncut lens LE, the lens its abutment point P is coincident with the axis A of the arm 621 moving Matches the diameter l. Therefore, for example, the contact wheel 62
It is possible to eliminate the error Δ that occurs when the fixed arm 5 is fixedly supported by the hand arm 623 without providing the oval-shaped piece 624 as shown by the two-dot chain 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 operate 41 and 642. That is, in FIG. 17, the pin 641 turns on the micro switch 641. This causes the moving stages 631 and 632 to move.
Is detected to be 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 6
40 activates the micro switch 642, and it is detected that the minimum separation state is reached, and the rotation of the feeler motor 637 is stopped by this detection signal.

A feeler arm 650 is attached to the front end of the free stage 633, and the tip of the feeler arm 650 is attached to the axis A of the arm 621 of the lens radius sensor 620 described above.
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 end 680 of the lens radius sensor 620 and an opening 680 through which the feeler of the lens surface shape sensor moves in and out of 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 Referring to FIG. 22, the structure of the electric control system of this embodiment having the above-described 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.

The feeler motor 637, the lens radius sensor motor 605, the lens rotary shaft motor 21, the carriage moving motor 60, the contact stop motor 420 and the grinding pressure motor 432 are connected to the motor controller 824. The motor controller 824 uses the arithmetic control circuit 810.
Which motor receives the pulse command from the pulse generator 80
It is a device for controlling how many pulses from 9 are output, that is, the number of revolutions of each motor. The grindstone motor 5 is driven by an AC power supply 826, and its 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 composed of, for example, a microprocessor, and its control is controlled by a sequence program stored in the program memory 814. An input device 2000 and a display device 1000 described later are connected to the arithmetic control circuit 810. Further, the measurement data of the lens, which has been arithmetically processed by the arithmetic control circuit 810, is transferred to and stored in the lens data memory 827. The arithmetic control circuit 810 also controls the frame shape measuring device system 800. Next, the configuration of the electric system of the frame shape measuring device system 800 will be described with reference to FIG. Driver circuits 801 to 804
Are X-axis motor 206, Y-axis motor 224, sensor arm rotation motor 301 and guide axis rotation motor 2, respectively.
09 is connected. The drivers 801 to 804 are controlled by the arithmetic control circuit 810 to generate a pulse generator 809.
The rotation drive of each of the pulse motors is controlled according to the number of pulses supplied from.

The reading output of the reading head 313 is
The counter 805 counts and inputs to the comparison circuit 806,
Corresponds to the radius change range a from the reference value generation circuit 807.
The change amount of the signal is compared. If the count value is within the range a
The counter value of the counter 805 and the pulse generator 809
The number of pulses from the
(Ρ _n, Θ_n) And the lens frame data memory 81
1 is input and stored here. From radius change range a
When the amount of change in the output of the counter 805 is large, the calculation control
The control circuit 810 receives the signal to that effect and drives the driver 808.
The electromagnetic magnet 318 of the spring device 315 is excited via the
To prevent the feeler 356 from moving and dry it.
The pulse supply to the motor 804 is stopped, and the motor 301 is rotated.
Stop rolling. Input Device and Display Device The input device and the display device of this embodiment are as shown in FIG.
The main switch consists of the seat switch
2100, function key 2200, and input switch
Switch group 2303 and two-system 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 for supplying only grinding water
2201; Grindstone switch 2 for rotating only the grindstone
202; Water supply for grinding wheel rotation for handrail processing
Handrail switch 2203 for instructing; lens frame shape of frame
Direct processing and template that measure the shape and process based on this
Machining type for selecting one of the copying process to be used
Formula selection switch 2204; automatic manual selection switch
Chi 2205; frame shape measuring device
The shape of the lens frame for both eyes
Binocular-monocular selection switch to select whether to measure
Chi 2206; Horizontal position of pupil and frame geometric center
Enter PD and FPD when entering the positional relationship,
Or to select whether to input the relative amount (approach amount)
Selection switch 2207; Grinding pressure intensity changeover switch 2
208; and beveling during template processing or flat polishing
From the selection switch 2209 for selecting whether to work
Become. The input switch group 2303 is a numeric key input.
Switch 2300 and a numeric keypad to cancel the input
Switch 2301 and memory switch for storing input
2302. By the way, the work of these switches
The moving state is the pilot lamp 260 provided for each.
Displayed by lighting 0.

As shown in FIG. 22, the display device 1000 displays the calculation result from the calculation control circuit 810 and the input device 2.
Liquid crystal display 1 based on input data from 000
Controller 1 for converting into a signal for driving 100
X driver 120 for driving the X row of the dot matrix liquid crystal element by a signal from 400 and the controller
0 and a Y driver 1300 for driving the Y column. Description of Device Operation Next, the operation of the above-described lens grinding device 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: Set the frame 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 section 100 in which the frame 500 is set is inserted from the opening 100 of the apparatus housing 1 and the hand 21 of the supporting device section 200A is inserted.
It is temporarily held at 1,212. 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. 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 displays the input data on the “FPD” display unit 1102 of the display 1100 via the controller 1400.

Next, the operator sets the optical center of the lens LE.
The amount of top-up U (see FIG. 13) is set on the numeric keypad switch 2300.
And the memory switch 2302 is pressed after the input is completed. This
As a result, the arithmetic control circuit 810 stores the input data in the memory.
In addition, the “UP” display unit 1 of the display 1100
103 is displayed. However, in step 1-5 above,
If "se" is selected, the relative amount of PD and FPD (
Enter the amount using the numeric keypad switch. Step 2-6: The operator judges the material of the lens to be processed
However, when it is a glass lens, the liquid crystal display shown in FIG.
"G Start" 110 displayed on the display 1100
Switch 2401 below 5, plus the lens to be processed
In the case of a tic lens, under “P Start” 1106
The switch 2402 is pressed. Step 2-7: With the completion of the input of the shift amount in the previous step
Operation control circuit that receives the ON signal of the memory switch 2302
The path 810 is the motor 22 of the frame shape measuring device 200.
4 to drive the frame holding device section 100 to the hand 21
1 and 212 to hold the main, then drive the motor 209
Set the frame to the measurement position. And the motor 30
1 is rotated and the sensor arm 302 is rotated. single
From the read head 313 of the encoder for each rotation angle
The output is counted by the counter 805, and the sensor arm rotates
Angle θ_nAnd the radial measurement value ρ from the counter 805_nFrom Ren
Frame radius information (ρ_n, Θ_n). This measurement data
Is the geometry of the lens frame where the center of rotation of the sensor arm 302 is
Since it does not always coincide with the center, as a preliminary measurement value
It is stored in the lens frame data memory 811. Step 2-8: The lens obtained in the preliminary measurement in the previous step
Frame radius information (ρ_n, Θ_n) And entered in step 2-2
PD data, FPD data and the amount of top-up U
The optical center position O according to the above equation (2)_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
_s(X_s, Y_s) Based on the frame shape measuring device
The Y-axis motor 224 and the X-axis motor 224 via the Ivers 801 and 803.
The right eye lens of the frame 500 by driving the camera 206 and
The frame is moved so that the center of rotation of the sensor arm 302 is O._s
(X_s, Y_s). Step 2-10: Sensor via driver 804
Rotate the arm 302 and re-measure the radius vector information of the lens frame.
Output from encoder read head 318
Is counted by the counter 805, and the count value and the motor 301
Number of pulses from the pulse generator 809 for rotating
Are both input to the arithmetic control circuit 810,
New radial information of the lens frame (_rsρ_n,_rsθ_n),
This is stored in the lens frame data memory 811. this
This is called the actual measurement of the lens frame. Step 3-1: The arithmetic and control circuit 810 is a motor controller.
By rotating the lens rotary shaft motor 21 via the roller 824.
The lens rotation shaft 28 is rotated in the direction of arrow 684. this
The unblocking of the opening 680 of the blocking plate 681 is released by. Next
The arithmetic control circuit 810 uses the lens frame data memory 811
Lens frame data (based on the actual measurement stored in_rsρ
_n, _rsθ_n) (N = 1, 2, 3, ..., N)
First information (_rsρ₁,_rsθ ₁) Is read from the memory 811
Picking_rsθ₁Based on the lens rotation axis 28 at that position
Stop. In addition, it moves to the lens radial center motor 605.
Diameter_rsρ₁The pulse number corresponding to the pulse generator 809
And the moving frame 610 to the raw lens LE side.
To move. As the moving frame 610 moves forward,
The arm 621 of the radius vector sensor 620 is also a constant torque spring 6.
14 pulls forward, its contact wheel 625 is unmachined
It contacts the edge surface of the lens LE. Move the arm at this time
The moving position is detected by the encoder 615, and the counter 8
20 is counted, and the count value is calculated by the arithmetic control circuit 810._rs
θ₁Radius R of lens LE on the meridian₁As
Calculated and stored 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

[0031]

[Outer 1]

[0032] From the front center of curvature located _f Z _O and the rear center of curvature located _b Z _O

[0033]

[Equation 1]

[0034]

[Equation 2]

[0035]

[Outside 2]

[0036]

[Outside 3]

The curve width C _b of

[0038]

[Equation 3]

(Where n is the refractive index of the lens)

[0040]

[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

[0042]

[Equation 4]

Obtained from this value, 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

[0044]

[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
A cross-sectional view of the auto bevel on the liquid crystal display 1100.
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 810 causes the liquid crystal display 1100 of the display device 1000 to display the characters “curve” and “shift amount” as shown in FIG. Is displayed, and the operator is prompted to enter 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 worker operates the switch 220.
After pressing the "close" switch of 7, the previous step 3-5,
The desired amount of displacement of the bevel apex obtained in 3-6 is input by operating the ten-key switch 2300 in millimeter units. The input data is displayed on the “close” display unit 1112 of the liquid crystal display 1100. Step 3-8: Simultaneously with the above operation, the arithmetic control circuit 81
0 shifts the bevel apex position of the minimum edge determined in step 3-5 based on the input shift amount by the shift amount, and
Based on the input bevel curve value, each radial angle _rs θ _i (i =
The bevel position information _e Z _i for 1, 2, 3, ... N) is obtained, 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. 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 calculate the bevel shape based on the new input, and causes the display device to display. To display. 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 performs the step 2-
In step 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, "P start"
Step 4 in the case of a command from the side selection switch 2402
-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: Place the lens on the rough grindstone for plastic
To move the carriage moving motor 60,
Rough grinding is performed as in step 4-2. Step 4-4: The calculation control circuit 810 is a contact stop motor
The 420 is controlled via the motor controller 824, and
Raise the carriage 2 and rough grind the processed lens LE after rough grinding.
After being separated from the stone 3a, the carriage moving motor 60
To position the lens LE on the bevel grindstone 3b.
It

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 and control circuit 810 causes the lens frame radius vector information ( _rs ρ stored in the lens frame data memory 827).
_i , _rs θ _i ) and the lens radius vector information ( _rs ρ _i ^′ , _rs θ _i ^′ ) of the processed lens measured in the previous step 4-5 are compared to determine whether the two 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 and control circuit 810 determines whether or not the grinding process has been completed for the binocular lenses, and if it has not been 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)

[0050]

[Equation 6]

As a 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: Attach the template SP on which the frame 500 is pre-molded to 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.

[0052]

[Outside 5]

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

[0054]

[Outside 6]

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

[0056]

[Outside 7]

[0057]

[Outside 8]

Thereafter, the above steps 3-3 to 3-9 and 4-4 are executed to complete the machining. 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 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 (2)

[Claims] 1. An unprocessed lens to be processed is rotatably supported on a lens rotation shaft, the lens to be processed is roughly ground with a rough grindstone, and the processed lens after rough grinding is beveled with a bevel grindstone. In the method of setting an appropriate bevel position for, in which the lens to be processed is roughly ground by the rough whetstone following the shape data of the lens frame of the spectacle frame into which the lens is framed or the template having the shape of the lens frame. A first step of obtaining edge thickness information that will be formed after beveling on a measurement trajectory of the lens to be processed having a predetermined relationship with a virtual edge trajectory obtained from shape data of the lens to be processed; The bevel apex position information for arranging the bevel apex after the bevel processing at a predetermined position is obtained and the first apex position information is obtained.
A second step of obtaining bevel shape information in addition to the edge thickness information obtained in the step; a third step of graphically displaying the bevel shape based on the bevel shape information obtained in the second step; A proper bevel position setting method comprising a fourth step of adjusting the edge thickness information or the bevel apex position information based on the bevel shape graphically displayed and setting the bevel apex position to an appropriate position. 2. The proper bevel position setting method according to claim 1, wherein the measurement locus is formed congruently with a virtual edge locus.