JPS61274861A - Lens grinding apparatus - Google Patents

Abstract

PURPOSE:To prevent a lens grinding apparatus for inserting a lens into an eye glass frame from the interposition of errors due to a profiling operation by permitting lens grinding according to a template system and digital control working of the lens without the template. CONSTITUTION:A means for moving a carriage 2 varies a distance between the axes of a rotary shaft 28 and a rotary shaft 31 of a grinding wheel 3. Also, a lens frame shape data input means supplies digital shape data (rhon,thetan) of a lens frame into which is inserted a workpiece lens LE to the input of a calculation control circuit. A lens rotation shaft control means controls the rotational amount of the rotary shaft 28 on the basis of the radius vector angle thetan information of lens frame shape data. Further, a carriage control means controls a carriage moving means on the basis of the radius vector information rhon of the lens frame shape data. A template system lens grinding apparatus provided with such means digitally controls the displacement of the carriage 2 and the rotational amount of the rotary shaft 28 to grind the lens LE on the basis of eye glass frame shape data LE.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lens grinding device for grinding a fabric eyeglass lens in order to fit it into a lens frame of an eyeglass frame.

A lens grinding device has been put into practical use as a lens grinding device for Chikugo made of rice, which grinds a fabric spectacle lens by copying the shape of a lens frame of a spectacle frame using a template.

This template-type lens grinding device requires a mold-cutting operation to create a template. For this reason, not only is the work complicated, but the errors of both the molding error when the lens frame is molded from the template and the grinding error when the lens is ground following the template overlap, making it difficult to use conventional methods. With this lens grinding device, it was not possible to achieve very high lens grinding accuracy. Therefore, the worker has to actually put the template into the lens frame, examine the differences in size and shape between the template and the lens frame, and create a template that matches the lens frame, and then grind the template according to the template. This required the lens to be retouched by hand.

Furthermore, since conventional lens grinding devices use an analog machining method called a copying method, they have the drawback of being difficult to process output signals and lacking in expandability for automatic control and systemization.

On the other hand, in recent years, the design of eyeglass frames has diversified, and instead of the type in which a beveled lens is fitted into a beveled groove like in conventional frames, a concave groove is formed on the edge of the lens, and wires extending from the frame are used. So-called rimless glasses have been put into practical use, such as frames in which the lenses are fixed to the frame by engaging them, and two-point frames in which the lenses are made with holes and the fringe and temples are fixed with screws. In order to manufacture these rimless glasses, the lenses had to be ground using templates of predetermined shapes prepared in advance by frame manufacturers.

The present invention was devised in view of the problems of the conventional lens grinding device, and its purpose is to take advantage of the advantages of the template-based lens grinding device while also producing lenses without a template. It is an object of the present invention to provide a lens grinding device capable of processing lenses under digital control based on digital data of a frame.

3. The structural features of the lens grinding device of the present invention are that it is a template-type lens grinding device, and furthermore, the lens grinding device uses a template type lens grinding device. The main feature is that the amount of rotation of the rotating shaft is digitally controlled, making it possible to grind the lens to be processed.

To help you understand more clearly with the explanation of the example described later,
According to the present invention, in addition to the grinding process using the template method, digital data (ρn
, θ, 1), it is possible to eliminate the intervention of errors and the troublesome work of creating a template, as in the past.

Additionally, since digital data is used, it has the great advantage of being extremely easy to combine with a lens shape measuring device, comparing measurement data from the lens shape measuring device with lens frame shape data, and calculating processing control amounts.

Furthermore, lens processing for rimless eyeglass frames has the advantage that conventional template-based processing can be used as is.

(Example) Overall Structure of Apparatus FIG. 1 is a perspective view, partially cut away, showing the overall structure of a lens grinding apparatus according to the present invention. A frame shape measuring device 200, which will be described later, is built into the lower front of the housing 1.
An opening 10 is formed in the front wall surface of the housing 1 to allow the frame holder to be taken in and taken out. A vertically swinging door 10a is attached below the opening. Also,
A keyboard 1000 and a display device 2000, which will be described later, are arranged vertically on the upper right side of the front wall surface.

In the whetstone chamber 30 of the housing 1, a rough whetstone 3 for glass lenses is installed.
A grinding wheel 3 is fixed to a rotating shaft 31. The grinding wheel 3 includes a rough grinding wheel 3C for plastic lenses, a beveling grindstone 3b, and a manual fine grinding wheel 3d. The rotating shaft 31 is a grindstone chamber 30
It is rotatably supported on the wall and has a pulley 53 at its end.
is installed. The pulley 53 is connected via a belt 52 to a pulley 51 attached to the rotating shaft of a grindstone rotating motor 5 consisting of an AC drive motor.

With this configuration, when the motor 5 rotates, the grindstone 3 is rotated.

A shaft 1) is slidably supported in the axial direction on a bearing 12 of the housing 1, and rear arms 33a and 33b of the carriage 2 are rotatably supported on this shaft 1). There is. The front arms 34a and 34b of the carriage 2 include
A lens rotation shaft 28a128b is coaxially and rotatably supported.

The lens rotation shaft 28a on the right side in FIG. 1 has a lens chucking mechanism with a known configuration, and moves forward and backward in the axial direction by rotation of the chucking handle 29, and holds the lens LE to be processed between the rotation shafts 28a and 28b. It is possible.

On the other hand, a disk 27a that comes into contact with an abutting device 42, which will be described later, and a template holder 27b for holding a template are attached to the outer end of the left lens rotation shaft 28b.

Pulleys 26a and 26b are attached to the lens rotation shafts 28a and 28b, respectively, and the carriage 2
Inside is a drive shaft 2 with pulleys 23a and 23b at both ends.
5 is built-in. 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 consisting of a pulse motor. A timing belt 24a2 is installed between the pulleys 23a and 23b and the pulleys 26a and 26b.
4b has been passed. With these configurations, motor 2
1 rotation is converted into rotation of the lens rotation axes 28a and 28b, and rotates the lens LE to be processed.

On the other hand, inside the carriage 2 is a lens measurement bag N6, which will be described later.
0 is built-in.

The end of the shaft 1) is attached to a frame 4 for moving the carriage.
It is fitted onto the arm portion 40 of. The frame 4 is slidably supported by a shaft 41 attached to the housing 1, and a feed screw 61 is screwed into the frame 4. The feed screw 61 is fixed to the rotating shaft of a carriage moving motor 60 consisting of a pulse motor. With this configuration, when the motor 60 rotates, the frame 4 is moved in the left-right direction, and the carriage 2 is moved in the left-right direction via the shaft 1). A stopper device 42 and a grinding pressure control device 43, which will be described later, are also attached to the frame 4.

A pin 43 a installed in the carriage 2 is brought into contact with the grinding pressure control device 43 .

FIG. 2 is a cross section taken along line nn' of the frame 4 in FIG. The abutting device 42 includes a abutting up/down motor 420 which is a pulse motor disposed on the lower surface of the frame 4.
It is generally composed of a support column 421 and a stopper member 422. A feed screw 423 attached to the rotating shaft of the motor 420 is screwed into a female threaded portion 424 of the support 421 .

Further, a key 425 is embedded in the side surface of the support column 421, and the key 425 is fitted into a key groove 44 formed in the frame 4.

A photosensor unit 427 is attached to the table section 426 at the upper end of the support column 421.

The abutting member 422 is rotatably attached to the table portion 426 by a shaft 428 that is rotatably fitted into the end of the table portion 426. A spring 470 is interposed between the abutting member 422 and the table portion 426, and the action of this spring 470 causes the abutting member 422 to be constantly lifted upward as shown by the two-dot chain line.

A light shielding rod 429 is attached inside the abutting member 422, and when the abutting member 422 is pushed down, it is positioned between the photo sensor units 427 and the unit 42
It acts to block the light running inside 7. Further, an eccentric cam 471 is attached inside the abutting member 422, and by rotating this, the distance between the cam surface and the table portion can be changed, and the stopping position of the abutting member 422 can be finely adjusted. An arcuate portion 422a having the same curvature as the rough grindstone 3a and a horizontal cut surface 422b are formed on the upper surface of the abutting member 422.

During the grinding process using a template, the template SP attached to the carriage 2 comes into contact with this arcuate portion 422a. Further, the horizontal cutting surface 422b is brought into contact with the disk 27a when grinding is performed using the lens frame shape measurement data of the frame. Incidentally, in this embodiment, the template is detected by abutting the template against the abutting member 422 as described above, but the present invention is not limited to this. For example, a method may be adopted in which the movement of the template, that is, the progress of lens processing, is checked based on the presence or absence of edges of the template between the photo sensor units.

The grinding pressure control device 43 includes a pulse motor 432 having a feed screw 431, a piston 434 that is threadedly engaged with the feed screw 431 through a female threaded portion 433, and a cylinder 435 that is slidably inserted on the outer wall of the piston 434. and cylinder 435
and a spring 436 disposed between the piston 434 and the piston 434.

A key 437 is implanted on the outside of the flange of the piston 434, and this key 437 is fitted into a key groove 45 formed in the frame 4. Top surface 435 of cylinder 435
a comes into contact with the side surface of a pin 43a attached to the carriage 2, and supports the weight of the carriage 2 by the elastic force of a spring 436. By moving the piston 434 up and down via the feed screw 433 due to the rotation of the motor 432, the amount of compression of the spring 436 changes, and the amount of force supporting the carriage 2 changes. Lens frame shape measurement that can change the pressure
Apparatus Next, the configuration of the lens frame shape measuring apparatus 200 will be explained based on FIGS. 3 to 10. FIG. 3 is a perspective view showing a lens frame shape measuring device according to the present invention. This device consists of three main parts: a frame holding device section 100 that holds the frame; It is composed of a support device section 200A that controls movement, and a measurement section 300 that digitally measures the shape of the lens frame or template of the eyeglass frame.

The support device section 200A has a housing 201. Housing 201
has a foot 253.254, and this foot 253.254
is the rail 251 attached to the housing 1 of the lens grinding device
．． 252 . Also door 10
a has rails 255256, and when the door 10a is opened, each of the rails 255 and 256 is connected to the rail 251.
．． 252.

With this configuration, the operator can slide the housing 201 and pull it out of the device housing 1 as necessary.

The housing 201 also includes a guide rail 202a that is installed parallel to the vertical direction (X-axis direction of the measurement coordinate system) on the housing 201.
, 202b, on which a movable stage 203 is slidably mounted. Moving stage 20
A female threaded portion 204 is formed on the lower surface of 3, and an X-axis feed screw 205 is screwed into this female threaded portion 204. This X-axis feed screw 205 is rotated by an X-axis motor 206 consisting of a pulse motor.

Flanges 207a and 207b on both sides of the moving stage 203
A guide shaft 208 is passed between them in parallel to the Y-axis direction of the measurement coordinate system, and this guide shaft 208 is connected to the flange 207a.
It is constructed so that it can be rotated by a guide shaft motor 209 attached to the guide shaft motor 209.

The guide shaft 208 has a guide groove 210 formed on its outer surface parallel to the shaft. The guide shaft 208 has a hand 21). 212 is slidably supported. This hand 21). Protrusions 213a and 214a are formed in the shaft hole 213214 of 212, respectively.
13a and 214a are the guide grooves 2 of the guide shaft 208 mentioned above.
10 and the hand 21). 212 guide shaft 2
Rotation around 08 is prevented.

The hand 21) has two slopes 215 and 216 that intersect with each other.
Similarly, the other hand 212 has two slopes 217 and 218 that intersect with each other. The ridgeline 220 formed by the side slopes 217 and 218 of the hand 212 is parallel to and in the same plane as the ridgeline 219 formed by the slopes 215 and 216 of the hand 21), and the angle formed by the slopes 217 and 218 and the slope 215 are The angles formed by .216 are configured to be equal. And both hands 21). As shown in FIG. 7(B), a spring 230 is hooked between the holes 212 and 212. In addition, each of the slopes 215 and 217 has a notch 2.
15a and 217a are formed.

Further, an arm 241 having a contact ring 242 at one end is attached to the hand 212 so as to be rotatable about the other end.

This arm 241 is normally brought into contact with a microswitch 244 by a spring 243. These contact rings 242,
The arm 241) spring 243 and microswitch 244 constitute a left/right eye determination device 240 of the frame.

A pulley 222 is rotatably supported at one end of the rear flange 221 of the moving stage 203.
A Y-axis motor 224 consisting of a pulse motor having a pulley 223 is attached to the other end of the motor. A mini cheer belt 226 with a spring 225 interposed between the pulleys 223 and 224 is hooked up, and both ends of the mini cheer belt 226 are attached to pins 2 planted on the upper surface of the hand 21).
It is fixed to 27. On the other hand, a collar 228 is formed on the upper surface of the hand 212, and this collar 228
12 moves the rear flange 2 of the moving stage 203.
The pin 229 is configured to come into contact with the side surface of the pin 229 implanted in the pin 21 .

The measurement unit 300 includes a sensor arm rotation motor 301 made of a pulse motor attached to the lower surface of the housing 201, and a sensor arm portion 302 rotatably supported on the upper surface of the housing 201. A belt 305 is passed between a pulley 303 attached to the rotating shaft of the motor 301 and a rotating shaft 304 of the sensor arm, so that the rotation of the motor 301 is transmitted to the sensor arm 302. Ru.

The sensor arm section 302 has two rails 31) extending above its base 310. 31) tl- has this rail 31). 31) A sensor head section 312 is slidably attached thereon. A magnetic scale reading head 313 is attached to one side of the sensor head section 312, which reads a magnetic scale 314 attached to the base 310 parallel to the rail 31) to detect the amount of movement of the sensor head section 312. It is configured. Further, on the other side of the sensor head section 312, a spring device 31 is provided that constantly pulls the head section 312 toward the side surface of the arm end.
One end of the constant torque spring 316 of No. 5 is fixed.

FIG. 6 shows the configuration of this spring device 315. An electromagnetic magnet 318 is provided in a casing 317 attached to a base 310 of the sensor arm section 302, and a slide shaft 319 is fitted into a shaft hole of the magnet 318 so as to be slidable in the axial direction thereof. This slide shaft 319 has flanges 320 and 321, and a spring 323 is interposed between the flanges 320 and the wall of the casing 317.
3, the slide shaft 319 is normally moved to the left in FIG. Clutch plates 324 and 325 are rotatably supported at the ends of the slide shaft 319, and one end of a constant torque spring 316 is fixed to one clutch plate 324. Further, a spring 326 with a slide shaft 319 fitted therebetween is interposed between both clutch plates 324 and 325, and the gap between these clutch plates 324 and 325 is constantly widened to prevent contact between the constant torque spring 316 and the clutch plate 325. .

Furthermore, a washer 327 is attached to the end of the slide shaft 319.
is installed.

FIG. 8 shows the configuration of the sensor head section 312. A slider 350 supported by a rail 31) has a shaft hole 351 formed in the vertical direction, and a sensor shaft 352 is inserted into this shaft hole 351.

The sensor shaft 3 is located between the sensor shaft 352 and the shaft hole 351.
A ball bearing 353 held by the sensor shaft 352 is interposed, thereby smoothing the rotation of the sensor shaft 352 around the vertical axis and the movement in the vertical axis direction.

Further, an arm 355 is attached to the center of the sensor shaft 352, and the upper part of this arm 355 has a solo bread bead shape having an inclination equal to the bevel inclination angle of the bevel grinding wheel 3b that comes into contact with the bevel groove of the lens frame. A bevel feeler 356 is rotatably supported. The circumferential point of the bevel feeler 356 is a vertical sensor axis 352.
It is configured to be located on the center line of

Next, the configuration of the frame holding device section 100 will be explained based on FIG. 4(A) and FIG. 5. Side 15 of fixed base 150
A frame holding rod 152.152 is screwed to the center of both flanges 151.151 having 1a and 151a. Further, inverted U-shaped bridges 151b, 151, and c are fixed to the flanges 151 and 151. These bridges 151b, 151c hold the holding device 100 in the hands 21). When inserted between the holding devices 212, if the direction is not the normal direction, the holding device comes into contact with the shoulder portions of the notches 215a and 217a of the hand, thereby preventing insertion of the holding device. Bottom plate 150a of fixed base 150 and flange 15
A movable base 153 having sides 153a, 153a is inserted between the base plates 1 and 1, and the movable base 153 is supported by two leaf springs 154 and 154 attached to the bottom plate 150a of the fixed base 150.

The movable base 153 has two parallel guide grooves 155.1.
55 is formed, and as shown in FIG.
55.155 and slider 156.156 downfall 156
a, 156a are engaged and the slider 156.156
is slidably placed on the movable base 153. On the other hand, a circular opening 157 is formed in the center of the movable base 153, and a ring 158 is rotatably fitted around the outer periphery of the circular opening 157.

There are two pins 159 and 159 on the top surface of this ring 158.
are implanted, and each of the pins 159, 159 is inserted into a slot 156c formed in the stepped portions 156b, 156b of the slider 156, 156.

Furthermore, linear notches 156d, 156d are formed in the center of the slider 156.156, and the notch 15
6d, 156d contains the above-mentioned frame holding rod 152.15
2 can be inserted respectively. Further, on the top surface of the slider 156, 156, there is a hole 156e for easy operation by inserting a finger of the operator when operating the slider.
156e is formed.

Next, Fig. 4 (B), (C) and Fig. 7 (A), (B)
The operation of the above-mentioned frame shape measuring device will be explained based on the following. First, as shown in FIG. 4(B), the slider 156
．． Insert your fingers into the holes 156e and 156e of the sliders 156 and 156 to sufficiently open the distance between the sliders 156 and 156, and press downward to release the leaf spring 154 together with the movable base 153.
．． The holding rod 152 and the slider 1 resist the elastic force of 154.
56. Leave a sufficient gap between the stepped portions 156b and 156b of 156. After that, the glasses frame 500 is placed within this interval.
Insert the lens frame 501 that you want to measure, and
01 upper and lower rims are sliders 156.156
Slider]56.Narrow the distance between 156 and 156 so that it touches the inner wall of the slider. In this embodiment, slider 156.
Since the slider 156 has a connection structure using the ring 158 as described above, the amount of movement of one of the sliders 156 and 156 directly gives the same amount of movement to the other slider.

Next, approximately the center of the upper rim of the lens frame 501 is located at the holding rod 15.
After sliding the frame 500 so that it is below 2, if the operator releases his hand from the slider 156.156,
As shown in FIG. 4(C), the movable base 153 is attached to the plate spring 1.
54. The lens frame 501 rises due to the elastic force of 154, and the stepped portion 156b.

156b and the holding rods 152 and 152, and the frame 500 is held between the approximate geometric center point of the lens frame 501 and the center point 1 of the circular opening 157 of the frame holding device 100.
57a are held so as to substantially coincide with each other. Further, 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 distance d from the side 153a of the movable base 153 are configured to take equal values.

Next, as shown in FIG. 7(A), the frame holding device section 100 holding the frame 500 in this manner is moved to the hands 21) of the supporting device 200, which are set at predetermined intervals.
Insert between 212 and 212. At the same time, the left and right eye determination device 2
40, when the contact ring 242 is brought into contact with the frame 500 and the arm 241 is rotated, the micro switch 24
Contact point 4 turns OFF. Thereby, the determination device 240 automatically determines that the lens frame 501 to be measured is for the left eye. Next, the Y-axis motor 224 is rotated by a predetermined angle. The mini-cheer belt 226 is driven by the rotation of the Y-axis motor 224, and the hand 21) is moved to the left by a certain amount, the frame holding device 100 and the hand 212 are also induced to move to the left, and the collar 228 is removed from the pin 229. . At the same time, the frame holding device 100 is moved by the tension spring 230 to both hands 21). It is held at 212. 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 connected to the slope 2 of the hand 21).
15 and the slope 217 of the hand 212, and both sides 153a, 153a of the movable base 153 contact the slope 216 of the hand 21) and the slope 218 of the hand 212, respectively.

In this embodiment, since the distances d from the apex 501a of the bevel groove of the glasses frame 501 to the sides 151a and 153a are equal to each other as described above, the frame holding device 100 is attached to the hands 21). 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 rotation of the guide shaft rotation motor 209 by a predetermined angle, the frame holding device part lOO turns to the position shown by the two-dot chain line in FIG. Stops on the same plane as the initial position.

Next, the Y-axis motor 224 is further rotated to hold the frame holding device section 100 by the hand 21). 212 is moved by a certain amount in the Y-axis direction, and the circular opening center point 159a of the frame holding device section 100 and the center of the rotation axis 304 of the measuring section 300 are approximately aligned.

At this time, the bevel feeler 356 comes into contact with the bevel groove of the lens frame 501 during the movement. Yagen feeler-35
The initial position of the pin 352a implanted in the lower end of the sensor shaft 352 is as shown in FIGS. 7(A) and 7(B).
Its direction is regulated by contacting the hanger 310a attached to the base 310 of the sensor arm section. As a result, when the glasses frame 500 moves due to the rotation of the Y-axis motor 224, the feeler always
356 can enter the bevel groove.

Subsequently, the motor 301 is rotated every predetermined number of unit rotation pulses. At this time, the sensor head section 312 moves along the rail 31) according to the shape of the glasses frame 500, that is, the radius of the lens frame 501. 31) and the amount of movement is read by the magnetic scale 314 and reading head 313.

From the rotation angle θ of the motor 301 and the reading amount ρ from the reading radar 313, the lens frame shape is (ρn, θ, )(
n=1.2.3...N). here,
As described above, this first measurement was performed with the center O of the rotation axis 304 approximately coinciding with the geometric center of the lens frame 501, as shown in FIG. 9(A). Therefore, the second measurement is based on the first measurement data (ρn, θ
The data (X,,Y
, ) to the measured point B (x5, y
b), the measured point D (Xa,
'la), the measured point A with the maximum value in the Y-axis direction (
xm, ya) and the measurement point C (Xc % ye) having the minimum value in the Y-axis direction, and after finding the geometric center O8 of the lens frame as... (1), as described later A frame 500 schematically shown in FIG. 9(B) inputted in advance from the keyboard 1000
From the distance between the geometric centers of both lens frames FPD and the interpupillary distance PD of the presbyopic wearer, calculate the inner alignment amount I as (FPD-PD)/2=1, and also based on the upward alignment amount U from the keyboard 1000. The pupil position of the wearing eye, that is, the position where the optical center of the lens to be processed should be located 0s (sXo, sYo)
03(SXO,5YO)=(xo+l,Yo+U
)・・・・・・・・・(2) Calculate as follows. This sXo and gYy value are also
The axis motor 206 and the Y-axis motor 224 are driven, and the hand 21). Frame holding device section 100 held by 212
, thereby moving the pupil center position 0 of the lens frame 501.
．． is aligned with the rotation center 0 of the sensor arm 302, the lens frame shape is measured again, and the measured value at the pupil center position 03 (, ρn9.θn) (n=1.2, 3. . .
, N).

In measuring the radius vector of the lens frame 501 as described above, if the bevel feeler 356 comes off from the lens frame 501 during the measurement, the radius measurement data will change as shown by e in FIG. 9(A). Since the data deviates greatly from the previous measurement data, a radius change range a is determined in advance, and when the radial change range a deviates from that range, the rotation of the sensor arm 302 is stopped, and at the same time, the electromagnetic magnet of the spring device 315 shown in FIG. 318 is excited and the collar 321 is attracted. As a result, the clutch plates 324 and 325 sandwich the constant torque spring 316 and prevent its winding action, thereby preventing the arm 355 of the sensor head section 312 from getting caught on the lens frame and damaging the eyeglass frame 500. After such displacement of the feeler 356 occurs, the glasses frame 500 is returned to the initial measurement position and the measurement is performed again. In the unlikely event that the bevel feeler 356 does not come off the frame 500,
Since the structure is such that the casing 201 can be pulled out by opening the casing (see Figs. 2 and 3), it is easy for the operator to remove the feeler.

Next, the lens measuring device for detecting the radius vector, edge thickness, curve value, etc. of the lens to be processed, which is built in the carriage 2, is installed in Figures 1) to 13 ( The explanation will be based on C). The base frame 601 has two parallel guide rails 6.
02.602 is passed, and a movable platform 603 is slidably disposed on this rail 602. Mobile platform 60
A feed screw 604 is screwed into the feed screw 6.
04 is driven by a lens radius sensor motor 605 consisting of a pulse motor.

A moving frame 610 is fixed to the upper surface of the moving table 603. The rear wall piece 61) of the moving frame 610 and the moving table 6
Two parallel rails 612 (only one is shown in FIG. 12) are passed between the two parallel rails 612, and a suspension table 613 is slidably mounted on the parallel rails 612. A constant torque spring member 614 is disposed between the suspension table 613 and the base frame 601, and acts to bring the suspension table 613 into contact with the rear surface of the movable table 603 at the initial stage. An arm 621 of a lens radius sensor 620 is fixed to the front side of the suspension table 613.

The U-shaped flange 622 at the tip of the arm 621 has a
As shown in FIG. 13, a modified H-shaped hand arm 623
is attached at one end so as to be rotatable about a shaft 03. At the other end of the hand arm 623, two oval pieces 624 and 624 are located at the rotation center 0. It is rotatably supported around the axis.

A contact shaft 625 having a circular cross section and contacting the shaft OI is rotatably attached between the two oval pieces 624 and 624 so that the shaft O2 is the rotation axis. This axis o2 and the contact axis 6
Due to the coincidence of the contact surfaces of 25 and the rotatability of the oval piece 624 around the axis 0□, when the contact shaft 625 comes into contact with the edge of the processed lens LE as shown in FIG. 13B (B), The contact point P coincides with the lens vector radius l, which coincides with the axis A of the arm 621. Therefore, it is possible to eliminate the error Δ that occurs when, for example, the contact shaft 625 is fixedly supported on the hand arm 623 without providing the oval piece 624 as shown by the two-dot chain line in the figure.

Central arm portion 626 of hand arm 623 and arm 62
A spring 627 is hooked between the arms 1 and 1, and acts to constantly pull the hand arm 623 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. 13(C), the configuration of the hand arm 623 is such that the processing lens LE is cut to a large extent and the contact shaft 623 is damaged.
This is to prevent the hand arm 623 and the contact shaft 625 from being damaged due to the clockwise rotation of the lens when the oyster 5 falls into the cut oyster. That is, when a force exceeding the limit is applied to the hand arm 623, the hand arm 623 pivots about the axis 03 against the tension of the spring 627. When the spring 627 crosses the axis B connecting the axis 0° and the fixed point of the spring 627, the hand arm 623
With the tension of , it rapidly turns and retreats from the lens LE to prevent damage to itself.

As shown in FIG. 12, a detection head 615a of a magnetic encoder 615 is attached to the lower end of the suspension table 613, and a scale 615b implanted in the base arm 601 is attached to the lower end of the suspension table 613.
is inserted. With this configuration, the amount of movement of the lens vector radius measuring member 620 is detected, thereby measuring the vector radius ρl, (i=1.2, 3, . . . , N) of the processed lens LE.

Next, the configuration of a lens surface shape sensor for determining the lens edge thickness and bevel curve value will be explained.

As shown in Figure 1), two parallel guide rails 630, 630 are arranged on the moving frame 610,
The stage 6 is slidably moved on this rail 630.630.
31.632 and Free Steel Shiro 33.634 are installed. The moving stage 631 and the free steel shield 33 are connected by springs 635 and 635. Similarly, the moving stage 632 and the free steel shield 34 are connected to the spring 636.
．． 636.

A feed screw 638 that is rotatably driven by a feeler motor 637 consisting of a pulse motor is screwed into the moving stages 631 and 632, and the screw directions of the feed screw 638 are opposite to each other with the center of the feed screw 638 as a boundary. Therefore, the rotation of the feed screw 638 moves the moving stage 6.
31.632 move in opposite directions.

Each of the moving stages 631,632 has a pin 640.
640 is implanted, and this pin is connected to the moving frame 61.
It is used to operate microswitches 641 and 642 attached to 0.

That is, in FIG. 1), the pin 641 turns on the microswitch 641, and thereby it is detected that the movable stages 631 and 632 are located at the initial position, which is the maximum separation state. When the feeler motor 637 is rotated and the distance between the movable stages 631 and 632 is narrowed, the pin 640 activates the microswitch 642, and it is detected that the minimum separation state is reached, and this detection signal causes the feeler motor 637 to rotate. rotation is stopped.

The feeler arm 6 is attached to the front end of the free steel shield 33.
50 is attached, and its tip is stretched parallel to the axis A of the arm 621 of the lens radial sensor 620 described above. A feeler 651 is rotatably supported on the bent end portion of the feeler arm 650. The contact peripheral edge 651a of the feeler 651 coincides with the ridgeline of the contact ring 625, that is, the rotation axis O3 of the oval piece 624. Similarly, a free steel arm 652 is attached to the front end of the free steel shield 34, and a feeler arm 652 is attached to the bent end of the free steel arm 652.
653 is rotatably attached.

Detection heads 661a and 66 of magnetic encoders 661 and 662 are mounted on the central wall 660 of the moving frame 610, respectively.
2a is attached, and its scales 661b, 66
2b are attached to free steel shields 33 and 634, respectively. Thereby, the amount of movement of the free steel shield 33, that is, the amount of movement of the feelers 651, 653 can be detected.

As shown in FIG. 12, a bushing solenoid 671 is attached to the moving table 603. This solenoid 6
71 is a hand arm 623 of the lens radius measuring device 620
When the feelers 651 and 653 approach each other to a predetermined distance in the radial direction, they are excited, and act to separate the suspension table 613 in order to retract the hand arm 623.

Furthermore, an opening 680 is formed in the carriage 2 for allowing the tip of the lens radius sensor 620 and the feeler of the lens surface shape sensor to move in and out toward the lens side. During lens grinding, grinding water flows into the lens measuring device through this opening 680.
A delay closing plate 681 is provided to prevent entry through.

The slow closing plate 681 is attached to a ring 683 that is rotatably fitted onto the lens rotation shaft 28 via an O-ring 682.

When the lens rotation shaft 28 is rotated in the direction of the arrow 684 in order to measure the lens radius, etc., the ring 683 causes the slow closing plate 681 to rotate at the same time due to the frictional force of the O-ring 682, releasing the slow closing of the opening 680. When rotated, the slow closing plate 681 comes into contact with a protrusion 686 formed on the carriage 2, and further rotation is prevented. Thereafter, only the lens rotation shaft 28 rotates against the frictional force of the O-ring 682, and the lens LE can be rotated. Conversely, when the lens rotation shaft 28 is rotated in the direction of the arrow 685 during lens grinding, the slow closing plate 681 is rotated at the same time and closes the opening 680 again late, and comes into contact with the protrusion 687 formed on the carriage 2. Since further rotation is prevented, the opening 680 continues to be closed slowly.

The configuration of the electrical control system of this embodiment having the above-mentioned mechanical configuration will be explained with a block diagram based on FIG. 14.

The encoder 615 of the lens radius sensor 620 and the encoders 661 and 662 of the lens surface shape sensor are connected to counter circuits 820, 821, and 823, respectively. Detection outputs from each encoder are counted by counter circuits 820, 821, and 823, and the results are input to the arithmetic control circuit 810. In addition, a photo sensor unit 427, micro switches 641, 642 and 244
is also connected to the arithmetic control circuit 810.

Feeler motor 637, lens radius sensor motor 6
05, the lens rotation shaft motor 21, the carriage moving motor 60, the stopper motor 420, and the grinding pressure motor 432 are connected to a motor controller 824. The motor controller 824 is a device that receives a control command from the arithmetic control circuit 810 and controls how many pulses from the pulse generator 809 are output to which motor, that is, the number of rotations of each motor. The grindstone motor 5 is driven by an AC power source 826, and its rotation and stop are controlled by a switch circuit 825 controlled by commands from an arithmetic control circuit 810.

Arithmetic control circuit 810 is composed of, for example, a microprocessor, and is controlled by a sequence program stored in program memory 814. The arithmetic control circuit 810 includes an input device 2000 and a display device 10, which will be described later.
00 is connected.

Furthermore, the lens measurement data that has been arithmetic-processed by the arithmetic control circuit 810 is transferred to the lens data memory 827 and stored therein. The arithmetic control circuit 810 also controls the frame shape measuring device system 800.

Next, the configuration of the electrical system of this frame shape measuring device system 800 will be explained based on FIG. 15.

Driver circuits 801 to 804 are connected to an X-axis motor 206, a Y-axis motor 224, a sensor arm rotation motor 301, and a guide shaft rotation motor 209, respectively. The drivers 801 to 804 control the rotational drive of each of the pulse motors according to the number of pulses supplied from the pulse generator 809 after being controlled by the arithmetic control circuit 810.

The reading output of the reading head 313 is measured by the counter 805.
is counted and inputted to a comparison circuit 806, where it is compared with the amount of change in the signal corresponding to the radius vector change range a from the reference value generation circuit 807. When the count value is within the range a, the count value of the counter 805 and the number of pulses from the pulse generator 809 are converted into radius vector information (ρi, θ1) by the arithmetic control circuit 810 and stored in the lens frame data memory 81). is entered and stored here. When the amount of change in the output of the counter 805 is larger than the radial change range a, the arithmetic control circuit 810 receives a signal to that effect and controls the spring device 31 via the driver 808.
The electromagnetic magnet 318 of 5 is excited, and the feeler 35
6 is prevented from moving, the supply of pulses to the driver 804 is stopped, and the rotation of the motor 301 is stopped.

The input device and display device of this embodiment are composed of sheet switches, as shown in FIG. 16(A), and include a main switch 2100, a function key 2200, an input switch group 2303, System start switch 2
4012402, and a stop switch 2500 for driving/temporarily stopping the drive. Here, the function keys 2200 are: pump switch 2201 for supplying only grinding water; grindstone switch 2202 for rotating only the grindstone; handrail switch 2203 for commanding the supply of grinding water for rotation of the grindstone for handrail processing. ; Machining type selection switch 2204 for selecting either direct machining, which measures the lens frame shape of the frame and processes it based on this, or copying machining, which uses a template; Auto/manual selection switch 2205 ; Frame shape Binocular-monocular selection switch 2206 for selecting whether to measure the lens frame shape of only one eye of the frame or the lens frame shape of both eyes with the measuring device; A selection switch 2207 for selecting whether to input PD and FPD or their relative amount (approaching amount) when inputting the horizontal positional relationship; grinding pressure strength changeover switch 2208 ; and template It consists of a selection switch 2209 for selecting whether to perform bevel processing or child end processing during processing.

The input switch group 2303 includes a numeric keypad manual switch 2300 and 1. A switch 2301 for canceling input using the numeric keypad, and a memory switch 23 for storing input.
It consists of 02. Incidentally, the operating states of these switches are indicated by lighting of pilot lamps 2600 provided for each switch.

As shown in FIG. 14, the display device 1000 includes a controller 1400 that converts the calculation results from the calculation control circuit 810 and input data from the input device 2000 into signals for driving the liquid crystal display 1)00. The X of the dot matrix liquid crystal element is controlled by the signal from the controller.
It consists of an X driver 1200 for driving rows and a Y driver 1300 for driving Y columns.

Breeding 1! Next, the operation of the lens grinding device described above will be explained based on the flowchart shown in FIG.

Step 1-1: After turning on the main switch 2100, first, the processing type selection switch 2204 is used to select whether to directly measure and chamfer the lens rim of the frame or to process it using a template.

Step 1-2 = The operator decides whether the bevel position setting is automatic or manual, and if it is automatic, presses the "auto" side of the selection switch 2205, and if manual, presses the "mani, 1 al" side.

Step 1-3: The arithmetic control circuit 810 reads the selection command of the selection switch 2204 of the input device 2000 and reads either the number addition sequence program or the template sequence program from the program memory 814.

1) Numeric processing [The operation sequence when numeric processing is selected will be explained below. ] Step 1-4: The operator measures only the shape of the lens frame for one eye of the frame,
The consumer selects whether to process using the inverted data or to measure the lens frame shapes of both eyes and process based on the respective data using a binocular/monocular selection switch 2206.

Step 1-5 = The operator inputs the horizontal positional relationship between the pupil center of the wearer's presbyopia and the geometric center of the frame.
Decide whether to input D or the relative amount (amount of shift) between the two. When inputting PD and FPD, press the rPDJ side of the selection switch 2207, and when inputting the amount manually, press the "approach" side.

Step 2-1: Set the frame so that the lens frame 501 of the frame 500 is fixed with the frame holding rod 152 of the frame holding device section 100. The frame holding device section 100 with the frame 500 set therein is inserted through the opening 100 of the device housing 1, and the hand 21) of the supporting device section 200A. It is temporarily held at 212.

Step 2-2: The lens frame left/right eye determining device 240 determines whether the lens frame 501 set on the measuring section 300 of the lens frame shape measuring device is for the left eye or the right eye. That is, the determination device 240
When the microswitch 244 is turned off, the arithmetic control circuit 810 determines that the lens frame positioned above the measuring section 300 is for the left limit. On the other hand, the frame holding device section 1
Even if 00 is set in the support device section 200, the determination device 240
When the microswitch 244 remains ON,
The arithmetic control circuit 81O determines that the lens frame positioned above the measurement unit is for the right eye.

Step 2-3: The determination result of the determination device 240, that is, whether it is a right-eye lens frame or a left-eye lens frame, is displayed on the liquid crystal display 1)00 by characters 1)13, as shown in FIG. 16(B).

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 cup is suctioned 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 to coincide with the lens rotation axis.

Step 2-5: The operator inputs the PD value of the wearer according to the prescription using the numeric keypad switch 2300, and presses the memory switch 2302 after completing the input. The arithmetic control circuit 810 temporarily stores the data in an internal memory and displays the input data on the rPDJ display section 1) 01 of the display. next,
The operator inputs the FPD value using the numeric keypad switch 2300 and presses the memory switch 2302 after completing the input. The arithmetic control circuit 810 temporarily stores the data in an internal memory and also outputs the data to the display 1 via the controller 1400.
The input data is displayed on rFPDJ display section 1)02 of )00.

Next, the operator moves the optical center of the lens LE upward by an amount U (
(see FIG. 9(B)) is input using the numeric keypad switch 2300, and after the input is completed, the memory switch 2302 is pressed. As a result, the arithmetic control circuit 810 stores the input data and the rUPJ display section 1) 03 of the display 1) 00.
to be displayed.

However, if "Movement" is selected in step 1-5, the relative amount (amount of shift) between the PD and FPD is input using the numeric keypad switch.

Step 2-6: The operator determines the material of the lens to be processed, and if it is a glass lens, press the switch under the "G start J1) 05" displayed on the liquid crystal display 1) 00 shown in FIG. 16 (A). 2401, or if the lens to be processed is a plastic lens, switch 2 under "P start J1) 06".
Press 402.

Step 2-7: Memory switch 2 is activated upon completion of input of input amount in the previous step.
302, the arithmetic control circuit 810 drives the motor 224 of the frame shape measuring device 200 to move the frame holding device section 100 to the hand 21). The frame is held at 212, and then the motor 209 is driven to set the frame at the measurement position. The motor 301 is rotated, and the sensor arm 302 is rotated. The output from the encoder reading head 313 for each unit rotation angle is measured by a counter 8.
05, and the lens frame radius information @(ρ
A. Find R7). Since the rotation center of the sensor arm 302 does not always coincide with the geometric center of the lens frame, this measurement data is stored in the lens frame data memory 81) as a preliminary measurement value.

Step 2-8: Lens frame radius vector information (R
7, R7) and the PD data, FPD data, and upsetting amount U input in step 2-2, calculate and control the optical center position 0, (X,, Y,') according to the above equation (2). The circuit 810 performs the calculation.

Step 2-9: The arithmetic control circuit 810 calculates the obtained O, (X,,Ys)
Drivers 801 and 80 of the frame shape measuring device based on
3 to drive the Y-axis motor 224 and the X-axis motor 206 to move the right eye lens frame of the frame 500 until the center of rotation of the sensor arm 302 is at O, (X, ,Y,).
to match.

Step 2-10 The sensor arm 302 is rotated via the second driver 804 and the radius vector information of the lens frame is measured again. Both the number of pulses from the pulse generator 809 for rotation are input to the arithmetic control circuit 810, new radius vector information (R71, 5θ, , ) of the lens frame is obtained from both data, and this is It is stored in the lens frame data memory 81). This is called the actual measurement of the lens frame.

Step 3-I: The arithmetic control circuit 810 rotates the lens rotation shaft motor 21 via the motor controller 824 to rotate the lens rotation shaft 28.
Rotate in the direction of arrow 684. As a result, the delay closing plate 68
The delayed closing of the opening 680 of No. 1 is released.

Next, the arithmetic control circuit 810 inputs the lens frame data memory 8
Lens frame data based on this measurement stored in 1) (
,3ρn,rsθtt)(n=1.2゜3,...,N
), the first information (□ρn, ■θI) is stored in memory 8.
1), the lens rotation axis 28 is read from Sθ,
stop at that position. Further, a pulse number corresponding to the radius vector value □ρn is supplied from the pulse generator 809 to the lens radius sensor motor 605, and the moving frame 610 is moved to the unprocessed lens rotation axis. As the moving frame 610 moves forward, the arm 621 of the lens radius sensor 620 also moves forward due to the tensile force of the constant torque spring 614, and its contact ring 6
25 comes into contact with the edge surface of the unprocessed lens LE. The moving position of the arm at this time is detected by the encoder 615 and counted by the counter 820, and the counted value is determined by the arithmetic control circuit 810 as □θ, the moving radius (radius) of the lens LE on the radial line.
Calculated as R1 and recorded in lens data memo I7827 (
R1. θ, ) (FIG. 18(B)).

Next, the feeler motor 63 is used to rotate the feeler motor 637 and move the moving stages 631 and 632.
7, when the pin 640 of the moving stage 632 turns on the microswitch 642, its rotation is stopped via the arithmetic control circuit 810 and the motor controller 824. Due to this movement of the moving stages 631, 632, the free steel shields 33, 634 connected thereto by springs 635, 636 slide on the rails 630, 630. As a result, the feelers 651 and 653 come into contact with the front and rear surfaces of the lens at positions with radius vectors of . . . 1 ρn, respectively.

The positions of feelers 651 and 653 at this time are detected by encoders 661 and 662, respectively, and counter 821
．． The count value tZI- is sent to the arithmetic control circuit 810 via 822.
, bZ+, and the arithmetic control circuit 810 transfers this to the lens data memory 827 and stores it.

Hereinafter, similarly, the radius vector angle, the lens radius RM at 3θ8,
Find the feeler positions gZH and IIZM, and all the information (1) θi, Ri % tZi, bZi) (i=
1.2.3. ..., N) is input to the lens data memory 827 and stored. As a result, feeler-6
51, 653 traces the lens frame radius vector information (, 3ρn, □θn) as a locus T using the raw lens refractive index, as shown in FIG. 18(B).

Step 3-2: The arithmetic control circuit 810 compares the radius R of the unprocessed lens LE obtained in step 3-1 with the lens frame radius vector ρ cage at its radius vector angle θ.

When R, < ρ, it is determined that a lens with the desired lens frame shape cannot be obtained even if the lens is ground, and a warning is displayed on the display 1)00 by the display device 1000, and the subsequent steps are performed. aborts execution. R, ≧ρ
, move to the next step.

Step 3-3: The arithmetic control circuit 810 calculates the two radius vectors ρ4 as shown in FIG.
, ρ8 respective feeler position information (rZa, bZ
a), CtZm, bZs), the front radius of curvature, T, the rear radius of curvature, T, and the front center of curvature position rZo and rear center of curvature position bZo of the unprocessed lens.

Next, the curve value C of the front refractive surface of the lens LE and the curve value Ch of the rear refractive surface of the lens LE are determined based on tR- and bR (where n is the lens refractive index), and these are stored in the memory 827. Also 1,
R, bR and lens frame radius information (,, Sρn1.1θ,)
The edge thickness Δn for each unit angle over the entire radial angle θ is determined from Δn=bZn−rZn, and this value is input into the lens data memory 827 and stored.

Step 3-4 = The arithmetic control circuit 810 obtains the lens frame vector radius information (.ρ1.0M) having the maximum edge thickness Δ□8 and the minimum edge thickness Δ1IiN from the lens frame data memory 81), ■ρ8, □θN ). Next, set the bevel shape G of the bevel grinding wheel 3b that has been determined in advance, and position the bevel apex so that the bevel apex P of the lens after bevel processing is at the front side: back side = 4; 6 position of the edge thickness. ,Z,4,. Find ZN as Next, find the determined bevel apex position.

28%. Based on ZN, the bevel carp value C2 is calculated from the above-mentioned number (
The bevel apex position *Zi (i=1.2, 3. . . . ) for each radial circumference is determined by the same solution method as Equation 4) and Equation (7), and from the bevel curve value CP and the edge thickness △7. N), and input these into the lens data memory 827 and store them.

Step 3-5: The bevel shape between the maximum and minimum edge thickness determined in step 3-4 is displayed as an auto-bevel cross-sectional view 1) 10 on the liquid crystal display 1) 00, as shown in FIG. 16(B). Here, the solid line schematically represents the bevel shape with the maximum edge △□, the broken line represents the bevel shape with the minimum edge △#, and the bevel shape of A7 is schematically shown so that the apexes of the respective bevels coincide.

Step 3-6 = If step 1-2 is "manual" input, proceed to step 3-7; if "auto" input is input, proceed to step 4-1.

Step 3-7: When the operator performed the "manual" operation in the previous step 1-2, the arithmetic control circuit 810 displays the characters "curve" on the liquid crystal display 1ioo of the display device 1000 as shown in FIG. 16(B). and ``amount of gathering'' are displayed, prompting the operator to input each desired numerical value. The worker uses the numeric keyboard 23
00 to input the desired curve value. The input data is displayed in the "Curve" column of LCD display 1) 00, and after confirming it, the operator presses the "Memory" switch 2302.
is pressed to store the input data in the internal memory of the arithmetic control circuit 810. Next, the operator presses the "shift" switch 2207, and then inputs the desired shift amount of the bevel apex obtained in the previous step 3-5.3-6 in millimeters by operating the numeric keypad switch 2300. . The input data is displayed on the LCD display 1)
12 is displayed.

Step 3-8: Simultaneously with the above operation, the arithmetic control circuit 810 shifts the bevel apex position of the minimum edge obtained in step 3-5 based on the input amount of deviation by the amount of deviation, and also shifts the bevel apex position of the minimum edge obtained in step 3-5 based on the input amount of deviation. Each radial angle, 1θ (i=1.2.3
. . N), the bevel position information and the Z positive are determined, and both the minimum and maximum bevel apex positions are graphically displayed on the manual bevel shape display section 1) 20 of the liquid crystal display 1) 00. Here, the solid line indicates the maximum bevel shape, and the broken line indicates the minimum bevel shape. In the example shown in Fig. 16 (B), the bevel apex is moved to the rear and the bevel curve is smaller (the radius of curvature is larger) than in the case of auto mode.
The shape of the bevel in this case is displayed.

The operator looks at the bevel shape display and, if the bevel position is unsatisfactory, inputs the amount of approach and bevel curve again, and calculates the bevel shape based on the new input to the calculation control circuit 810.
is calculated and displayed on the display device. The final determined bevel position information, Z.

is stored in the lens data memory 827.

Step 3-9: The operator selects automatic or manual bevel shape display 1.
) 10, 1) 20, and if you want to select auto-change, turn on the start switch 2401 below that display. When selecting manual override, turn on the start switch 2402 below the display.

Step 4-1 The arithmetic control circuit 810 determines from which start switch the signal was received in step 2-6. In the case of a command from the “G start” selection switch 2401,
Go to next step 4-2, "P start" selection switch 2
If the command is from 402, the process moves to step 4-3.

Step 4-2 = The arithmetic control circuit 810 calculates the lens frame radius vector information (1, ρn1..5θ0) stored in the lens frame data memory 81).
) with a maximum radius of 5ρn88 (rsρn.X,.

θ□X). Subsequently, the lens rotation shaft motor 21 is rotated via the motor control circuit 824, and the lens LE is continuously rotated.

Next, the arithmetic control circuit 810 turns on the switch circuit 825.
to rotate the grindstone motor 5. Arithmetic control circuit 810
is then the vector radius 1. Stopping motor 420 based on ρ, .
by rotating the horizontal cut surface 422b of the stopper member 422.
is the distance d from the grinding wheel surface of the rough grinding wheel 3a. , lower it to the height of X. Here, d1)8 is the maximum lens frame radius □ρ, □, the radius r of the ring 27a, and draw = rtρ+*ax r” '・' ・
...19).

The carriage 2 is lowered by the lowering of the abutting member 422, and the lens LE to be processed is ground by the rough grindstone 30. is the abutting member 422
The light blocking rod 429 blocks the optical path of the photosensor unit 427 (see FIG. 2), and inputs the blocking signal to the arithmetic control circuit 810. The arithmetic control circuit 810 continues to count the number of pulses corresponding to one revolution of the lens rotation axes 28a and 28b, and if no cutoff signal from the photosensor unit 427 is input during that time, the entire circumference of the lens to be processed is It is determined that the machined radius vector is r, ρ□.

Subsequently, the arithmetic control circuit 810 reads the lens frame data memory 81.
) to Lsρ021. Read the data of θ1),
The lens rotation shaft motor 21 is rotationally controlled based on the data of Se1, and the lens LE to be processed is rotated. Next, r8
The stopper motor 420 is controlled based on the radius vector data of ρ, and the stopper member 422 is lowered to a height of d.

As shown in FIG. 20, the height d8 of the abutting member 422 is generally determined by the (8th) relationship between the radius vector, ρ, and the ring r.
As obtained from the formula, dt =,,ρ, -r (i =L 2+ 31・
...IN)--(81').

As the abutting member 422 descends, the lens LE to be tested is further roughly ground.1. When the grinding is completed to a radius vector of ρn, the photosensor unit 427 again inputs a cutoff signal to the arithmetic control circuit 810. When the arithmetic control circuit 810 receives the signal, it calculates (W, ρ
2, r, θ2) as data and rotate the lens LE to the angle of r, θ2.1. , Se2, the abutting member 422 is lowered to the height d2, and the lens LE is ground.

Similarly, the lens LE until (,, Se2.7.θs)
By grinding, the lens LE to be processed is ground into the shape of the lens frame data (rsρn.15θi).

Step 4-3 = The lens is moved by the carriage movement motor 60 to position it on the rough grindstone for plastics, and rough grinding is performed in the same manner as in Step 4-2.

Step 4-4: The arithmetic control circuit 810 controls the abutment motor 420 via the motor controller 824 to raise the carriage 2 and remove the rough-ground processing lens LE from the rough grindstone 3a, and then the carriage moving motor 60 is controlled to position the lens LE above the bevel grindstone 3b.

Next, the arithmetic control circuit 810 controls the lens frame data memory 81
) to lens frame radius information (rsρ8, ■θ1) (i=1
．． 2.3...N) sequentially and the corresponding bevel position information or from the lens data memory 827
Z i is sequentially read, and based on these data, the lens rotating shaft motor 21, abutting motor 420, and carriage moving motor 60 are controlled to perform bevel processing on the roughly ground lens with the beveling grindstone 3b.

Step 4-5 = After the beveling process is completed, the arithmetic control circuit 810 controls the abutting motor 420 to return the carriage 2 to the normal position on the beveling grindstone, turns off the switch 825, and stops 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. This rotates the light shielding plate 681 and opens the opening 680. Figure 21 (A) and Figure 21 (B)
As shown in FIG. 3, the arithmetic control circuit 81O rotates the lens radius sensor motor 605 to move the moving frame 610 forward. Accordingly, the lens radius sensor 620 is moved forward by the tensile force of the constant torque spring 614, and the contact shaft 625 is brought into contact with the vertex of the edge of the beveled lens LE.

Since the lens rotation axis 28 is rotated, the encoder 615
is the radius vector information of the lens LE (rsρn°, gate θi')
(i=1.2, 3..., N) is detected, and this is sent to the arithmetic control circuit 810 via the counter 820.
It is measured in

Step 4-6: The arithmetic control circuit 810 calculates the lens frame radius information (,5ρnsrsθ5) stored in the lens frame data memory 827.
and the lens vector radius information (r, sρ, rsθ, ゛) of the processed lens measured in the previous step 4-5, and it is determined whether or not they match. If they match, the process moves to step 4-8; if they do not match, the process moves to step 4-7.

Step 4-7: ■From ρ5. When ρn” is large, the stopper member 422
The height di is slightly lowered and the process returns to step 4-4 again to perform bevel processing.

Step 4-8 If it is determined in step 4-6 that □ρi and ρi'' match, the initial state is restored.Then, the lens for which processing has been completed is removed from the carriage.

Step 6-1: The arithmetic control circuit 810 determines whether or not the grinding process for the binocular lenses has been completed. If the grinding process has not been completed yet, the process proceeds to step 5-2. When it is determined that the process has ended, all steps are completed.

Step 6-2 and Step 6-4 The arithmetic control circuit 810 determines whether binocular measurement or monocular measurement has been selected in step 1-4, and if "monocular" is selected, the next step is performed. Proceed to step 6-3. When “binocular” is selected, the display device 1000
The message "Please set the mail order lens frame of the frame" is displayed on the liquid crystal display 1) 00, and the operator sets the mail order lens frame 501. Below is step 2 mentioned above.
After executing steps -2 to 2-4, the process moves to step 2-7.

Step 6-3 When step 1-4 is a single eye measurement command, the arithmetic control circuit 8
10 converts the right eye lens frame measurement data (r-pn, ri7'-) obtained in step 2-6 from polar coordinates to orthogonal coordinates, and then converts the orthogonal coordinate data, yi (□Xi1..Y1
) (i=1.2, 3..., N), new lens frame shape data ('sXi, tsY
Find ＝). This data is obtained by inverting the shape of the lens frame of the right eye with the axis of symmetry as the Y axis of the Xs Ys coordinates with the optical center Os' as the origin, as shown in Fig. - Polar coordinate transformation tsρn,
t3θn) is stored in the lens frame data memory 81) as the left eye lens frame shape.

Step 3-1 after executing steps 2-4 and 2-6 below
Move to.

2) In the case of plate processing If it is determined in step 1-2 that template processing has been selected, grinding is performed according to the following steps.

Step 5-1: Attach the template SP on which the frame 500 has been previously molded to the template holder 27b of the carriage 2 (see FIG. 22) Step 5-2: Place the lens LE to be processed onto the lens rotation shaft 28 of the carriage 2 chucking.

Step 5-3: The operator determines the material of the lens to be processed, and if it is glass, press the switch 2401 or 2402 below the "G start" display, and if it is plastic, press the switch 2401 or 2402 below the "P start" display. push. If the switch 2401 is turned on, the process moves to step 5-4, and if the switch 2402 is turned on, the process moves to step 5-5.

Step 5-4: The arithmetic control circuit 810 turns on the switch 825 to rotate the grindstone motor 5 and 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 abutting motor 420 lowers the arcuate portion 422a of the abutting member 422 under the control of the arithmetic control circuit 810 until it is at the same height as the glass rough grindstone 3a. As a result, rough grinding of the lens LE is started. When the cutoff signal from the photosensor 427 is continuously output for one rotation of the lens rotation shaft 28, the arithmetic control circuit 810 determines that rough grinding is complete, and controls the abutment motor 420 to set the carriage 2. After raising it to the position, the switch 825 is turned off to stop the grindstone 3.

Step 5-5: The lens LE to be processed is positioned on the plastic grinding wheel 3C by driving the carriage moving motor 60, and the following steps are performed.
Rough grind in a manner similar to step 5-°4 above.

Step 5-6 = The operator uses the selection switch 2209 to input whether the lens after rough grinding should be beveled or smoothed.

Step 5-7 = If bevel processing is selected in step 5-6, the process moves to the next step 5-8, and if smoothing is selected, the process moves to step 7-1.

Step 5-8: The arithmetic control circuit 810 rotates the lens rotation shaft 28 by rotating the motor 21, opens the aperture 680, and as shown in FIGS. 23(A) and 23(B), the lens radius sensor The motor 605 is controlled to move the moving frame forward, and the tensile force of the constant torque spring 614 brings the contact shaft 625 into contact with the edge of the roughly ground lens LE. encoder 6
15 is the processing radius f)L (i=1.2 of the lens LE)
．． 3. ..., N) and inputs the data to the arithmetic control circuit 810 via the counter 820. The arithmetic control circuit 810 also controls the motor 605 so that the fillers 651 and 653 come to the position where the measured radius value j is reduced by a predetermined amount α (p=−α), and the motor 6
37 to make the free steel shield 33.634 into a free state, and the tweeters 651, 653 measure the front position f Z i and the rear surface position b Z i of the roughly ground lens LE using the encoder 661.662.

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

Step 7-1: If the operator selects smoothing in step 5-6, the arithmetic control circuit 810 reads this in step 5-7, rotates the carriage moving motor 60, and moves the lens LE to be processed. It moves onto the smooth grindstone 3d, and then lowers the carriage 2 to process the small end.

Automatic detection device for plate processing In the above-described embodiment, the selection of number processing and template processing is performed by the command of the selection switch 2204.
0 (A) and (B) are examples in which the selection can be automatically instructed by attaching a template.

A bearing 710 is attached to the arm 34 of the carriage. The bearing 710 has a slot 71 along its longitudinal direction.
is formed. A stopper lever 712 is fixed to one end of the bearing 710, and a shaft 714 having a tapered portion 713 formed at the other end is rotatably inserted. axis 71
A pin 715 is implanted on the outer periphery of 4. This pin 7
15 is normally in contact with the end face of the bearing and prevents the shaft 714 from moving in the axial direction. The end of the shaft 714 further includes a shaft 7.
A spring 718 is applied to constantly pull 14 in the direction of arrow 716 in FIG. 10(A). This spring 718 is
Since the shaft 714 is twisted in the direction 16, a force is applied to rotate the shaft 714 in the direction opposite to the arrow 717.

A contact shaft 720a of a microswitch 720 is in contact with the tapered portion 713. Microswitch 720 is connected to arithmetic control circuit 810.

As shown in FIG. 10(B), the stopper lever 712 has a notch 712a formed therein, and when the lever 712 is rotated, a pin for holding the template SP embedded in the end of the lens rotation shaft 28 is formed. The center pin 28a is covered from above and works to prevent the template SP from coming off.

Next, the operation of this embodiment will be explained. When processing a template, the operator attaches the template SP to the template holding pin of the lens rotation shaft 28 of the carriage 2. Next, stopper lever 71
2 clockwise in FIG. 10(B) until the notch 712a abuts the center pin 28a. When the pin 715 is in the slot 71), the spring 71
With a tensile force of 8, shaft 714 is moved in the direction of arrow 716.

As this shaft 714 moves, its tapered portion 713 turns on the microswitch 720 and the arithmetic control circuit 81
0 can automatically receive template processing instructions.

[Brief explanation of the drawing]

FIG. 1 is an external perspective view showing a mechanical part of a lens grinding device according to the present invention with one end cut away, and FIG. 2 is a line taken along line n' in FIG.
A sectional view, FIG. 3 is an external perspective view of the frame shape measuring device,
FIG. 4(A) is a perspective view of the frame holding device section, FIG.
B) and (C) are explanatory diagrams showing the action, FIG. 5 is a vertical cross-sectional view of the frame holding device section, FIG. 6 is a vertical cross-sectional view showing the structure of the spring member, and FIG. 7 (A) is a vertical cross-sectional view showing the structure of the spring member. A schematic diagram showing the relationship between the support device part and a part of the sensor, FIG. 7(B) is a sectional view thereof, FIG. 8 is a partially cutaway side view showing a part of the sensor, and FIG.
A) is a schematic diagram showing the relationship between finding the geometric center and optical center from the measured values of the lens frame, Figure 9 (B) is a schematic diagram showing the relationship between frames PD, and Figure 9 (C) is the right A schematic diagram showing the relationship between eye lens frame data and left eye lens frame data. Figures 10 (A) and (B) are diagrams showing the automatic detection device for template processing. Figure 1) is a plane view of the lens measuring device. Figure, 12th
The figure is a sectional view of XII-XI in Figure 1), Figure 13 (A)
or C) is a diagram showing the structure and function of a part of the tip of the lens radius sensor, FIG. 14 is a block diagram showing the electrical system of the present invention, and FIG. 15 is a block diagram showing the electrical system of the frame shape measuring device. FIG. 16(A) is a diagram showing a display device and an input device, FIG. 16(B) is a diagram showing another display example of the display device, FIG. 17 is a flowchart showing the operation sequence of the present invention, and FIG. 18 (A), (B), Figure 21 (A), (B),
Fig. 23 (A>, (B) is a schematic diagram showing the operation of the lens measuring device, Fig. 19 (A), (B) is a schematic diagram showing the relationship between lens curve and edge thickness, Fig. 20 and Fig. 22 is a diagram showing the relationship between the carriage and the abutting member. 1... Apparatus housing, 2... Carriage, 3... Grindstone, 10a... Door, 28a, 28b... Lens Rotating shaft, 100... Frame holding device section, 201-... Housing, 202a, 202b... Guide rail, 203...
...Movement stage 210...Guide shaft, 21). 21
2... Hand, 240... Left and right eye determination device, 302
. . . Sensor arm portion, 312 . . . Sensor head portion, 352 . (A) C (XC, VC) old) (C) Figure 16 (A) Figure 16 old) Figure 18 (A) Figure 19 (A) Figure 19 (B) Figure 21 (A) Figure 21 (B) Copper Figure 23 (A) Older Copper Figure 23)

Claims (4)

[Claims] (1) A carriage having a lens rotation shaft that holds the lens to be processed and rotates it at low speed, a grindstone that rotates at high speed to grind the lens to be processed, and a lens of an eyeglass frame in which the lens to be processed is framed. A lens grinding device comprising: a template holding means for attaching a template having a frame shape or a predetermined desired lens processing shape to the lens rotation shaft; and a template detection means for detecting movement of the template, A carriage moving means for changing the distance between the lens rotation axis and the rotation axis of the grindstone, and digital shape data (ρ_n, θ_n) of the lens frame of the eyeglass frame in which the processed lens is framed are input. and a lens frame shape data input means for inputting the digital shape data (ρ_
lens rotation axis control means for controlling the amount of rotation of the lens rotation axis based on radial angle information θ_n of the lens frame shape data (ρ_n, θ_n); A lens grinding device further comprising a carriage control means for controlling the carriage moving means. (2) The template detection means holds a stop member against which the template comes into contact, a detection member that detects movement of the stop member, the stop member and the detection means, and The lens grinding device according to claim 1, comprising a shaft member movable in a direction parallel to the radial direction, and a drive means for moving the shaft member. (3) The lens grinding apparatus according to claim (2), wherein the carriage moving means also serves as a template detection means. (4) The lens frame shape data input means includes a frame shape measuring device for obtaining lens frame shape data (ρ_n, θ_n), and the frame shape measuring device includes a detection feeler that comes into contact with the bevel groove of the lens frame. an arm member that movably supports the detection feeler and is rotatably supported on a moving table; a radius detection means that detects the amount of movement of the detection feeler and obtains radius vector information ρ_n of the lens frame; The lens grinding apparatus according to claim 1, further comprising a radius vector angle detection means for detecting the amount of rotation of the arm member and determining the radius vector angle θ_n of the lens.