JP2825877B2 - Bevel position display method, device therefor, and ball mill having the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention combines a side image including a bevel position of a lens frame rim of an eyeglass frame with a side edge image of a lens framed in the lens frame. The present invention relates to a bevel position display method for displaying an image, a device therefor, and a ball mill having the same.

(Prior Art) A frame shape measuring device for automatically and mechanically and electrically measuring digital information of a two-dimensional shape, that is, radial information of a lens frame of an eyeglass frame in which a lens to be processed is placed, and the frame shape measuring device Ball milling machine that automatically grinds the lens to be processed based on the lens frame radial information measured by is disclosed in detail in Japanese Patent Application No. 60-115079 filed earlier by the present applicant. I have. Further, a frame shape measuring device for mechanically and automatically and automatically measuring the three-dimensional shape of a bevel apex locus of a rim of a lens frame as digital data is disclosed in Japanese Patent Application No. This is disclosed in detail in 123593.

The ball-slider disclosed in Japanese Patent Application No. 60-115079 further measures the edge thickness of the lens to be processed based on the lens frame radial information measured by the frame shape measuring device, and obtains the edge thickness measurement data. Based on this, the expected bevel apex position that will be formed by grinding on the lens to be processed is automatically calculated for the maximum edge thickness portion and the minimum edge thickness portion, and the cross-sectional shape can be displayed as an image, and if necessary The position of the lens to be processed can be corrected manually, and the lens to be processed is automatically ground so that a bevel is formed at the automatically calculated or corrected vertex position.

(Problems to be Solved by the Invention) In any of the above prior arts, the three-dimensional shape of the trajectory of the bevel apex of the rim of the lens frame or the position of the bevel apex formed by grinding the lens to be processed before the lens grinding. However, the thickness of the rim of the lens frame of the spectacle frame in which the lens to be processed is framed is visually estimated to determine the position of the bevel apex where the lens should be processed.

Therefore, when the processed lens is framed in the lens frame, the lens edge protrudes greatly from the front of the rim,
Conversely, the bevel apex positioning error could occur because the front surface of the rim was too large from the front refracting surface of the lens.

Measuring the rim thickness for each lens frame is complicated, and even if the rim thickness is measured, the lens should be positioned so that the positions of the front and rear rims of the rim and the position of the front and rear refracting surfaces of the lens have an ideal positional relationship. It took a lot of experience and intuition to determine the top position of the processing bevel and was extremely difficult. Therefore, a bevel position display device capable of displaying an image of the positional relationship between the lens frame rim, its bevel apex position, and a predicted lens edge, and a ball mill having the bevel machine have been desired.

A first object of the present invention is to provide a bevel position display method for displaying an image of a three-dimensional positional relationship between a lens frame rim, a bevel apex position thereof, and a predicted processing edge.

A second object of the present invention is to provide a bevel position display device that displays an image of a positional relationship between a lens frame rim, a bevel apex position thereof, and a predicted lens edge for processing.

An object of FIG. 3 of the present invention is to provide a beading machine having a bevel position display device for displaying an image of a three-dimensional positional relationship between a lens frame rim, its bevel apex position, and a predicted lens edge.

(Means and Actions for Solving the Problems) In order to achieve the above object, claim 1 includes a first step of inputting refraction surface position data of a spectacle lens framed in a lens frame rim of a spectacle frame; A second step of inputting rim shape data of the lens frame rim; obtaining a cross-sectional image of the lens frame rim and a cross-sectional image of the eyeglass lens from the refraction surface position data and the rim shape data; A third step of matching the thick portions and displaying the plurality of matched images.

The input means for inputting refraction surface position data of the spectacle lens framed on the lens frame rim of the spectacle frame and rim shape data of the lens frame rim, and the refraction surface position data and the rim shape data. Display means for matching both the cross-sectional image of the lens frame rim and the cross-sectional image of the edge of the spectacle lens at a plurality of edge thickness portions and displaying the plurality of images that match each other.

(Embodiment) Hereinafter, an embodiment of a ball mill according to the present invention will be described.

The ball mill comprises a lens frame shape measuring device 1, a lens shape measuring device 3, a bevel position display device 4, and a lens processing section. The lens processing part is the same as the above-mentioned Japanese Patent Application No. 60-115079.
Since they have the same configuration and operation as those described above and are not directly related to the present invention, description thereof will be omitted.

A. Lens Frame Shape Measuring Apparatus First, an embodiment of the lens frame shape measuring apparatus 1 of the present invention will be described with reference to FIGS.

Details of the configuration and operation of the lens frame shape measuring apparatus 1 excluding a rim thickness measuring means described later are disclosed in the above-mentioned Japanese Patent Application No. 63-123593.

This apparatus is roughly divided into three parts, namely, a frame holding device unit 100 for holding a frame, and supporting the frame holding device unit 100, and transferring the holding device unit to a measurement plane and in the measurement plane. Support unit that controls the movement of
It comprises a 200 and a measuring unit 300 for digitally measuring the shape of the lens frame of the glasses frame.

The support device 200 has a movable stage 203 that can move in a vertical direction (X direction of the measurement coordinate system) on a housing (not shown). 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 into the female screw portion 204. The X-axis feed screw 205 is rotated by an X-axis motor 206 composed of a pulse motor. Thereby, the moving stage 203 is moved in the X-axis direction.

A guide shaft 208 is passed between the flanges (not shown) of the moving stage 203 in parallel with the Y-axis direction of the measurement coordinate system.
The guide shaft 208 is configured to be rotatable by a guide shaft motor 209.

Hands 211 and 212 are slidably supported on the guide shaft 208.

The hand 211 has two slopes 215 and 216 intersecting each other as shown in FIG. 3B, while the hand 212 also has two slopes 217 and 218 intersecting each other. The ridge 220 formed by the two slopes 217, 218 of the hand 212 is the slope 215, 216 of the hand 211.
Are formed so as to be parallel to the ridge line 219 formed in the same plane and within the same plane S, and that the angles formed by the slopes 217, 218 and the slopes 215, 216 are equal to each other. A spring 230 extends between the hands 211 and 212 as shown in FIG. 3 (B).

A pulley 222 is rotatably supported at one end of the moving stage 203 and a Y-axis motor 2 having a pulley 223 at the other end.
24 are attached. A mini cheer belt 226 is stretched around the pulleys 223 and 224, and both ends of the mini cheer belt 226 are fixed to pins planted on the upper surface of the hand 211.

A rim thickness detection head 231 is provided on the lower surface of the hand 211.
One end of a magnescale 232 is fixed to the lower surface of 2, and the change in the distance between the hand 211 and the hand 212 is
And the detection head 231 can measure.

The detection head 231 and the magnescale 232 constitute a rim thickness detection unit 233. The output signal output from the detection head 231, that is, the detection result is
6 is input to the arithmetic circuit 613.

The measuring unit 303 includes a sensor arm rotation motor 301 attached to the lower surface of a housing (not shown) and a sensor arm unit 302 rotatably supported on the upper surface of the housing. Motor 3
A belt 305 is stretched between the pulley 303 attached to the rotation shaft 01 and the rotation shaft 304 of the sensor arm, so that the rotation of the motor 301 is
It is transmitted to 02.

The sensor arm 302 has two rails 311 and 311 that extend over the base 310, and the sensor head 312 is slidably mounted on the rails 311 and 311. A magnetic scale reading head 313 is mounted on one side of the sensor head unit 312, thereby reading a magnetic scale 314 mounted on the base 310 in parallel with the rail 311 and detecting the movement amount of the sensor head unit 312. Have been. Further, to the other side of the sensor head 312, one end of a spring (not shown) of a spring device 315 that constantly pulls the head 312 to the side surface of the arm end is fixed.

FIG. 4 shows the configuration of the sensor head 312,
A shaft hole 351 is formed in the slider 350 supported by 11 in the vertical direction, and a sensor shaft 352 is inserted into the shaft hole 351. A ball bearing 353 held by the sensor shaft 352 is interposed between the sensor shaft 352 and the shaft hole 351, thereby smoothing the rotation of the sensor shaft 352 around the vertical axis and the movement in the vertical axis direction.

At the center of the sensor shaft 352, an arm 355 is mounted. Above the arm 355, a solo van ball-shaped bevel filler 356 that is in contact with the bevel groove of the lens frame is rotatably supported. The circumferential point of the bevel filler 356 is configured to be located on the center line of the vertical sensor axis 352.

Below the slider 350, a reading head 3 of a sensor 358 made of, for example, a magnescale for measuring the vertical movement amount of the sensor axis, that is, the Z-axis movement amount.
59 is installed. On the other hand, the magnetic scale 360 of the sensor 358 is attached to the lower end of the sensor shaft 352.

Next, the configuration of the frame holding unit 100 will be described with reference to FIG.

Both sides flange 15 having sides 151a, 151a of fixed base 150
Frame holding bars 152, 152 are screwed to the center of 1,151. A movable base 153 having sides 153a, 153a is inserted between the bottom plate 150a of the fixed base 150 and the flange 151, and the movable base 153 is fixed by two leaf springs 154, 154 attached to the bottom plate 150a of the fixed base 150. Supported.

Two parallel guide grooves 155, 155 are formed in the movable base 153, and a pair of projecting legs (not shown) provided on each of the sliders 156, 156 are engaged with the guide grooves 155, 155, respectively.
Sliders 156, 156 are slidably mounted on the movable base 153.

On the other hand, a circular opening 157 is formed at the center of the movable base 153, and a ring 158 is rotatably fitted on the inner periphery thereof. Two pins 159 (other not shown) are implanted on the upper surface of the ring 158, and each of the pins 159 (other not shown) has a slot 156c formed in a stepped portion 156b of the slider 156. (Otherwise not shown).

In the center of the sliders 156, 156, a vertical notch 1
56d, 156d are formed, and the above-mentioned frame holding rods 152, 152 can be inserted into the notches 156d, 156d, respectively. In addition, holes 156e, 156e are formed on the upper surfaces of the sliders 156, 156 so that an operator can easily insert and insert a finger when operating the slider.

Next, the operation of the above-described frame shape measuring device will be described based on FIGS. 2 (A), (B), (C) and FIGS. 3 (A), (B).

First, as shown in FIG.
Insert a finger into the holes 156e, 156e of 6, and open the sliders 156, 156 sufficiently apart from each other, and press downward to move the movable base 15
Together with 3, the clearance between the two holding rods 152 and the stepped portions 156b, 156b of the sliders 156, 156 is sufficiently increased against the elastic force of the leaf springs 154, 154.

Thereafter, the lens frame 501 of the spectacle frame 500 to be measured is inserted into the space, and the space between the sliders 156, 156 is narrowed so that the upper rim and the lower rim of the lens frame 501 contact the inner walls of the sliders 156, 156. In this embodiment, since the sliders 156, 156 have the connection structure by the ring 158 as described above, one of the sliders 156, 156 gives the same amount of movement as the other slider as it is.

Next, after the frame is slid so that the approximate center of the upper rim of the lens frame 501 is below the holding bar 152, if the operator releases the sliders 156, 156, the movable base 153 is moved by the leaf springs 154, 154. The lens frame 501 is raised by the elastic force, the lens frame 501 is sandwiched between the stepped portions 156b, 156b and the holding rods 152, 152, and the frame 500 is the geometric center point of the lens frame 501 and the center point of the circular opening 157 of the frame holding device section 100. Are held so as to substantially match

Further, at this time, the distance d from the vertex 501a of the bevel groove of the lens frame 501 to the side 151a of the flange 151 of the fixed base 150 is equal to the distance d from the piece 153a of the movable base 153.

Next, after inserting the frame holding device unit 100 holding the frame 500 in this manner between the hands 211 and 212 of the support device 200 set at a predetermined interval, the Y-axis motor 224 is rotated by a predetermined angle. The rotation of the Y-axis motor 224 drives the mini cheer belt 226, moves the hand 211 to the left by a fixed amount, and induces the frame holding device 100 and the hand 212 to move to the left.

At the same time, the frame holding unit 100 is held between the two hands 211 and 212 by the tension spring 230. At this time, the side 151 of the flange 151 of the fixed base 150 of the frame holding unit 100
a and 151a are respectively in contact with the slope 215 of the hand 211 and the slope 217 of the hand 212, and both sides 153a and 153a of the movable base 153.
Are in contact with the slope 216 of the hand 211 and the slope 218 of the hand 212, respectively.

In this embodiment, as described above, the distance d from the bevel groove 501a of the glasses frame 501 to each of the sides 151a and 153a
Are equal to each other, the frame holding device 100
When sandwiched between 1,212, the bevel groove apex 501a of the lens frame 501
Is automatically located on the reference plane S formed by the ridgelines 219 and 220 of both hands.

Next, the frame holding device unit 100 is turned to a position shown by a two-dot chain line in FIG. 3A by rotation of the guide shaft rotation motor 209 at a predetermined angle. The reference plane S stops on the same plane as the initial position of the bevel filler 356 of the measuring unit 300.

Next, the Y-axis motor 224 is further rotated to move the hands 211 and 212 holding the frame holding unit 100 by a fixed amount in the Y-axis direction, so that the center point of the circular opening 157 of the frame holding unit 100 and the rotation axis of the measuring unit 300 are rotated. Approximately coincide with 304 center. At this time, the bevel filler 356 comes into contact with the bevel groove of the lens frame 501 during the movement.

Subsequently, the motor 301 is rotated every predetermined number of unit rotation pulses. At this time, the sensor head unit 312 moves on the rails 311 and 311 according to the shape of the glasses frame 500, that is, the moving radius of the lens frame 501, and the amount of movement is read by the magnetic scale 314 and the reading head 313.

From the rotation angle θ of the sensor arm rotation motor 301 and the read amount ρ from the read head 313, the lens frame shape is measured as (ρ _n , θ _n ) (n = 1, 2, 3,... N). .

Here, the first measurement is performed by centering the center O of the rotation shaft 304 on the lens frame 501 as described above and shown in FIG.
The measurement was made so as to substantially coincide with the geometric center of.

The second measurement is based on the first measurement data (ρ _n ,
θ _n ) is converted from polar coordinates to rectangular coordinates (X _n ,
Y _n ), the measured point B (X _b , Y _b ) having the maximum value in the X-axis direction,
Measurement point D (X _d , Y _d ) having the minimum value in the X-axis direction, measurement point A (X _a , Y _d ) having the maximum value in the Y-axis direction and the measurement point having the minimum value in the Y-axis direction Select the point C (X _c , Y _c ) and _define O 中 in the geometry of the lens frame, Then, the X-axis motor 206 and the Y-axis motor 224 are driven based on the _XΘ and _YΘ values to move the frame holding device unit 100 held by the hands 211 and 212, thereby the academic center O _theta to match the rotation center O of the sensor arm 302 to measure again lens frame shape measurement value at the geometric center _{O Θ (Θ ρ n, Θ} θ n) (n = 1,2,
3,... N).

At the time of measuring the lens frame shape based on the above-mentioned geometric center O _Θ , the sensor 358 uses the sensor head 312 in the Z-axis direction.
Is also measured at the same time. As a result, three-dimensional information of ( _レン_ズ ρ _n , _{Θθ n} ) (n = 1, 2, 3,... N) is finally obtained for the lens frame shape.

As shown in FIG. 7 (B), when the hands 211 and 212 hold the frame holding unit 100, the rim thickness detection head 231 detects the movement amount (measurement interval) h of the magnescale 232,
Input to the arithmetic circuit 613. Data read by the read head 313 and the rim thickness detection head 231 is rim shape data, and reading of these data corresponds to a second step of inputting rim shape data.

Hold the frame holding device section 100 in a state where the eyeglass frame 500 is not set in the frame holding device section 100 with the hand 2
Reference interval H between hands 211 and 212 when nipped at 11,212
Is previously known in design as shown in FIG.
It is stored in the reference value memory 607.

Now, assuming that the angle between the reference plane S and the slopes 215 to 218 of the hands 211 and 212 is Γ, In this embodiment, since Γ is designed to be 45 °,
The rim thickness ε is eventually calculated by the arithmetic circuit 316 as ε = h−H (2) and displayed on the rim thickness display section 422 of the display 41 (see FIG. 8) described later.

FIG. 1 also shows a block diagram of an arithmetic and control circuit of the frame shape measuring apparatus of the present application.

The driver circuits 601 to 604 are respectively
6, Y axis motor 224, sensor arm rotation axis motor 301,
And a guide shaft rotation motor 209. Driver 601
Numerals 604 control the rotational drive of each pulse motor according to the number of pulses supplied from the pulse generator 609 to those controlled by the sequence control circuit 610.

The read output of the read head 313 is counted by a counter 605, and the count value ρ _n and the number of pulses from the pulse generator 609 are converted into the rotation angle of the sensor arm 355, and the value θ _n
And (ρ _n θ _n ) are input to the data memory 611 as a set,
This is stored.

Next, the arithmetic circuit 613 side, the first round of the radius vector information stored in the data memory 611 (ρ _n, θ _n) calculates the geometric center O _o of the lens frame 501 on the basis of the data It is input to the sequence control circuit 610. Sequence control circuit 610
Is based on the data from the arithmetic circuit 613,
X _theta formulas, we obtain the Y _theta, drives the motor 206,224 Enter the number of pulses required for the driver 601 and 603, to match the center of the lens frame 501 to the center of rotation of the sensor arm 302.

At the same time, the sequence control circuit 610 commands the counter circuit 615 to count the data from the Z-axis sensor 358. Then, again the Z-axis direction data lens frame shape information _{(Θ ρ n, Θ θ n} , Z n) containing measured, and stores the data in the data memory 611.

The lens frame shape information stored in the data memory 611 ( _Θ
[rho _{n, theta} theta _n, Z _n) of Z from _n information, curve value c of the lens frame
Can be obtained by the arithmetic circuit 613 as necessary.

Its operation Figure 6 (A) and (B), the at least two points a on the lens frame, the radius vector in the b [rho _A, [rho
_{From B} and the two sensor heads Z _A and Z _{B in} the Z-axis direction, calculate the radius of curvature R of the sphere SP including the bevel path of the lens frame 501. From the lens frame bevel curve value CF is calculated R
From (Where n is a constant and n = 1.523), and the value is stored in the data memory 612.

Next, the sequence control circuit 610 causes the counter 606 to count the detection data from the rim thickness head 230, and inputs the data to the arithmetic circuit 613. The arithmetic circuit 613 calculates the above formula (2) from the reference interval H stored in the reference value memory 607 in advance and the input measurement interval h to obtain the rim thickness, and stores the rim thickness in the data memory 612. .

Note that the sequence control circuit executes the above-described measurement steps according to a program built in the program memory 614.

FIG. 19 and FIG. 20 show another embodiment of the lens frame shape measuring apparatus. The measuring section 300 and the arithmetic / control circuit have the same configuration as in the above-described embodiment, and therefore the description is omitted.

The movable support rails 1001 and 1002 are movably supported on guide rails 1007, and feed screws 1004 and 1 having feed directions opposite to each other.
005 are formed and approached / separated from each other by a feed screw portion 1003 driven to rotate by a motor 1006.

In the movable support rail 1001, pedestals 1032 and 1033 are housed so as to be able to move up and down along guide rails (not shown), and the pedestals 1032 and 1033 are feed screws 103 whose feed directions are opposite to each other.
5 and 1036 are formed and approached / separated from each other by a feed screw member 1034 driven to rotate by a motor 1037. Pedestal 10322
A pedestal 1031 that can move up and down along a guide rail (not shown) is attached via a pressing spring 1038.

The pedestal 1031 has two holding rods 1011 and 1012 fixed thereto, inserted into a pair of slots 1024 (the other is not shown) formed in the movable support rail 1001, and protrudes outside the movable support rail 1001. Two holding rods 1021 (the other is not shown) are fixed to the pedestal 1033, inserted into a pair of slots 1024 (the lower part is not shown), and protrude out of the support rail 1001.

In the movable support rail 1002, pedestals 1042 and 1043 are housed so as to be able to move up and down along guide rails (not shown), and the pedestals 1042 and 1043 are feed screws 104 whose feed directions are opposite to each other.
5,1046 are formed, and are approached / separated from each other by a feed screw member 1044 rotated and driven by a motor 1047. A pedestal 1041 that can move up and down along a guide rail (not shown) is attached to the pedestal 1042 via a pressing spring 1048.

One holding rod 1013 is fixed to the base 1041 and inserted into a slot 1026 formed in the movable support rail 1002 so as to protrude outside the movable support rail 1002. A single holding rod 1023 is fixed to the base 1043, inserted into the slot 1026, and protrudes out of the movable support rail 1002. Further, a contact 1049 is attached to the pedestal 1041, and a detector 1050 made of, for example, a potentiometer is attached to the pedestal 1043.The contact 1049 is in contact with the detector 1050, and the upper and lower sides of the holding rod 1013 and the holding rod 1023. The relative movement amount in the direction is detected. Contact 10
The rim thickness detector 233 is composed of 49 and the detector 1050.

 Next, the operation of the present embodiment will be described.

Movable support rail 1001 for lens frame 501 of eyeglass frame 500
Are mounted on a pair of holding rods 1021 (the other is not shown) and the holding rod 1023 of the movable support rail 1002, and the motor 1006 is driven to move the movable support rails 1001 and 1002 closer to each other so that the rim of the lens frame 501 is removed. Are brought into contact with the inner surfaces of the support rails 1001 and 1002, respectively. Next, drive the motors 1037 and 1047,
The holding rods 1011, 1012, 1013 are lowered to cooperate with the corresponding holding rods 1021 (not shown), 1023 to hold and hold the rim. At this time, the distance between the holding rod 1013 and the holding rod 1023 is
It is detected at 1050, and this detection result is converted to the rim thickness ε by the arithmetic circuit 613.

FIGS. 21 and 22 show still another embodiment of the lens frame shape measuring device, and the same or equivalent components as those of the lens frame shape measuring device described in FIGS. 19 and 20 are the same. And the description is omitted.

The movable support rail 1001 has a feed screw 1103 that is rotated by operation of a feed handle 1104, and the rotation thereof moves the stopper 1105 along the longitudinal direction of the movable support rail 1001. The tip of the stopper 1105 protrudes outside the movable support rail 1001 through a slot (not shown). Also, the inner surface of the movable support rail 1002
A supporting protruding side 1111 is formed on 1001a.

The movable support rail 1002 has a feed screw 1106 that is rotated by operating the feed handle 1107. Lead screw 1106
Are formed with feed screws (not shown) whose feed directions are opposite to each other. Stopper 1108, 110 for each feed screw
9 is screwed together and the feed handle 1107 is rotated,
The stoppers 1108 and 1109 are configured to be movable along the longitudinal direction of the movable support rail 1002 so as to approach / separate from each other. The distal end of each of the stoppers 1108 and 1109 protrudes through a slot (not shown) in the movable support rail 1002. Also, the inner surface 1002 of the movable support rail 1002
A supporting projection 1112 is formed on a.

In the movable support rail 1002, the tip of the movable piece 1121 having the inclined surface 1121a is further housed so as to protrude from the vertical slit 1125. The slot 1123 formed in the movable piece 1121 is inserted into the regulating bar, and only the vertical movement of the movable piece 1121 is permitted within a predetermined range. A spring 1124 is attached to the lower end of the movable piece 1121, and the movable piece 1121 is constantly pulled downward. A contact 1149 is attached to the movable piece 1121, and the contact 1149 is in contact with a detector 1050 that is, for example, a potentiometer attached to the inner surface of the movable support rail 1002, and detects the amount of vertical movement of the movable piece 1121.

 Next, the operation of the present embodiment will be described.

The lens frame 501 of the spectacle frame 500 is movably supported such that the front surface of the rim abuts against the supporting protrusions 1111, 1112, and the upper and lower surfaces of the rim are held between the inner surfaces 1001a, 1002a of the movable support rails 1001, 1002. The rails 1001 and 1002 are driven close to each other by driving the motor 1006. Stopper 1105, 1108, 1109
Is used to define the position of the lens frame 501 in the left-right direction, and clamps the rim from the lateral direction.

The movable piece 1121 is moved upward against the tensile force of the spring 1124 along with the holding of the lens frame 501, and the amount of movement is detected by the detector 1050 and converted into the rim thickness ε by the arithmetic circuit 613. .

B. Lens Shape Measuring Device FIG. 8-3 shows a lens shape measuring device. Since this apparatus has the same configuration as that of Japanese Patent Application No. 60-115079, refer to the application for details of the configuration and operation.

This lens shape measuring device 3 has a stage 31 that is moved back and forth by driving a pulse motor 36, and this stage 31
Are provided with feelers 32, 34 capable of holding the lens L to be measured, and the feelers 32, 34 are biased by springs 38, 38 in a direction approaching each other, and are configured to always hold the lens L.

On the other hand, the lens rotating shafts 4, 4 incorporated in the carriage (not shown) are configured to be rotatable by a pulse motor 37, and the lens L is attached to the lens rotating shafts 4, 4 by the optical axis O.
Are held so as to coincide with the rotation axes of the lens rotation axes 4 and 4. Thus, the lens L is rotated by the pulse motor 37.

Lens measurement radial information ( _k ρ _n ,
_k θ _n ) (where n = 1, 2, 3,... N), angle information
_k θ _n is input to the operation / control circuit 21 and the operation / control circuit 21
Supplies the pulse of the pulse generator 27 to the driver circuit 37A based on the information, and drives the pulse motor 37 from the reference position to the angle _k.
It is configured to rotate θ _n . On the other hand, the radial length information _k
ρ _n is similarly input to the arithmetic / control circuit 21, which drives the pulse motor 36 that supplies the pulse of the pulse generator 27 to the driver circuit 36 A based on the information, and passes through the stage 31. The front ends of the feelers 32 and 34 are moved back and forth to move the optical axis O of the lens L (the rotation axis of the lens rotation axes 4 and 4).
And is configured to be located at a position related to the radial length _k ρ _n .

Note that the meaning and calculation method of the lens-measuring radius vector information _{(k ρ n, k θ n} ) described in the section describing the operation below.

At this position, the amount of movement F _n of the feeler 32 (here, n = 1, 2, 3,... N) is detected by the encoder 33, and this is used as the lens front side refraction surface position information.
Through the lens data memory 22.

Similarly, the amount of movement F _n (where n = 1, 2, 3,... N) of the feeler 32 at this position is detected by the encoder 35, and this is calculated / calculated as lens rear refractive surface position information. Control circuit 21
Through the lens data memory 22.

C. Bevel Position Display Device The bevel position display device 4 includes an arithmetic / control circuit 21, an input / output keyboard 40 connected thereto, and a lens data memory.
22, measurement radial memory 23, rim surface / bevel vertex memory 24,
It is composed of a lens bevel vertex, a memory 25, an image creation circuit 42, a symbol image memory 43 connected thereto, and a program memory 26.

The input / output keyboard 40 has a display 41 formed of, for example, a liquid crystal display or a CRT for displaying an image of a bevel position or the like and numerically displaying input / output data, and various input keys 4 described later.
01 to 413.

D. Operation The operation of the lens shape measuring device 3 and the bevel position display device 4 will be described below with reference to the flowchart of FIG.

Step S-1 (FPD, PD, input of upward adjustment amount): The operator operates the FPD key 405 of the input / output keyboard 40, and is previously stored in an internal storage circuit (not shown) inside the arithmetic / control circuit 21. The distance between the lens frame geometric centers of the spectacle frames, that is, the reference value of the frame PD is displayed on the display 41 as “FP
D ”on the display unit 414.

If the frame PD value of the eyeglass frame 500 to be framed this time is different from the reference frame PD value, the operator operates the “+” key 408 or the “−” key 409 of the input / output keyboard 40 to obtain the desired display value. , And the “set” key 413 is operated to store the value in the internal storage circuit.

The operator operates the PD key 406 of the input / output keyboard 40 to display the interpupillary distance, that is, the reference value of the PD, which is stored in advance in the internal storage circuit of the arithmetic / control circuit 21 on the display 41.
D ”on the display unit 415.

If the PD value of the wearer of the glasses frame 500 to be framed this time is different from this reference PD value, the operator presses the “+” key 408
Alternatively, the user operates the "-" key 409 to set the display value to a desired value, and operates the "set" key 413 to store it in the internal storage circuit.

Next, the operator presses the “up” key on the input / output keyboard 40.
After operating the 407, the "+" key 408 is operated to display the desired upward amount UP on the "upward" display section 416, and the "set"
By operating the key 413, it is stored in the internal storage circuit.

Step S-2 (measurement radial calculation): The calculation / control circuit 21 determines the inset amount IN from the frame PD value and the PD value input in step S-1, IN = PD-FPD. (5) Calculate as

Next, the arithmetic / control circuit 21 controls the frame shape measuring device 1
Frame shape information ( _Θ ρ _n , _Θ θ _n , _Θ Z _n ) having the origin at the geometric center O of the lens frame 501 of the eyeglass frame 500 measured in the data memory 611 and stored in the data memory 611 (here, n
= 1, 2, 3,... N). Read out the i-th
Lens Wakudo size information _{Θ P 1 (Θ ρ 1,} Θ θ 1) of the measurement points 10
Coordinate transformation into _X Θ -Y Θ -Z Θ coordinate system of the coordinate as shown in FIG, _{Θ Calculate} P ₁ ( _Θ X ₁ , _Θ Y ₁ ) and move the measurement point _Θ P ₁ from the origin O _o to X
The inset amount IN minute in _theta axially, and X _k -Y _k -Z _k i-th machining point _k P ₁ of the coordinate system Y _theta axially above the shift amount UP partial origin O _k is moving, The coordinates As

Then, this is again used as the lens measurement radius P ₁ ( _k ρ ₁ , _k θ ₁ ) with the origin O _k as the origin. Perform coordinate transformation. This series of coordinate transformations is performed by an arithmetic / control circuit.
At 21, the measurement is performed from the first measurement point P ₁ to the n-th measurement point P _n , and the measurement radial information ( _k ρ _n , _k θ _n ) (where n = 1, 2, 3,...)
.. N) are stored in the measured radial memory 23.

Step S-3 (measurement of lens shape): The operator sets the lens L to be measured (lens to be processed) on the lens rotation axes 4 and 4 so that the optical axis O coincides with the rotation axes of the lens rotation axes 4 and 4. Hold it.

Arithmetic / control circuit 21 of the lens-measuring radius vector information _{(k ρ n, k θ n} ) from the measurement radius vector memory 23, reads the angle information _k theta _n, the pulse of the pulse generator 27 on the basis of the information and supplied to the driver circuit 37A, rotating angle _k theta _n the pulse motor 37 from the reference position. At the same time, the radial length information _k ρ _n is also input to the arithmetic / control circuit 21, and based on the information, the pulse of the pulse generator 27 is supplied to the driver circuit 36 A, and the pulse motor 36 is driven. Feeler 32,3
The tip of the lens 4 is moved back and forth to position the lens L at the position of the moving radius length _k ρ _n -γ from the optical axis O (the rotation axis of the lens rotation axes 4 and 4). Here, γ is a known amount as the depth of the V beveling grindstone in the processing portion for grinding the lens L.

Then, as shown in FIG. 12, the feeler
The amount of movement F _{n of} 32 (where n = 1, 2, 3,... N) is detected by the encoder 33, and this is correlated with the rotation angle _k θ _n of the lens L, and the lens front-side refractive surface position information is detected. (F _n , _k θ _n ) is stored in the lens data memory 22 via the arithmetic / control circuit 21.

Similarly, the amount of movement B _n (where n = 1, 2, 3,... N) of the feeler 34 at this position is detected by the encoder 35, and this is corresponded to the rotation angle _k θ _n of the lens L. Then, it is stored in the lens data memory 22 via the arithmetic / control circuit 21 as lens rear refractive surface position information (B _n , _k θ _n ). The movement amounts of the feelers 32 and 34 read by the encoders 33 and 35 are refraction surface position data, and reading this data corresponds to a first step of inputting rim shape data. Also,
Read head 313, rim thickness detection head 231 and encoder
33, 35, etc. constitute an input means.

Step S-4 (Rim surface / bevel vertex calculation): The calculation / control circuit 21 is a lens frame 501 measured by the frame shape measuring device 1 and stored in the data memory 611 thereof.
Bevel position information ( _{Θρ n} , _{Θθ n} , _{ΘZ n} ) of the lens frame with the geometric center O _原点 as the origin (where n = 1, 2, 3,...)
X _k -Y _k where reading out the N), the bevel apex position _theta Z ₁ of the i-th measurement point _theta P ₁ Z _theta axially, corresponding to the i-th measurement point _theta P ₁
To associated as Z _k axis direction of the bevel apex position ZE ₁ of the i-th machining point _k P ₁ of -Z _k coordinate system. This series of correspondence is
Run the machining point _k P ₁ through N-th machining point _k P _n, bevel vertex position information in the X _k -Y _k -Z _k coordinate system of the lens frame _{501 (ZE n, k θ n} ) ( where, n = 1,2,3, ... N). Note that the Z coordinate Z of the origin O _原点 of the X _Θ -Y _Θ -Z _Θ coordinate system
_Θ coincides with the Z coordinate Z _k of the origin O _k of the X _k −Y _k −Z _k coordinate system as shown in FIG.

Next, as shown in FIG. 11, the arithmetic / control circuit 21 measures the data by the data memory 612 measured by the frame shape measuring device 1.
Read out the rim thickness ε of the lens frame 501 stored in
This rim thickness ε and the bevel vertex position information (ZE _n , _k θ _n )
The rim front position information (ZF _n , _k θ _n ) and the rim rear position information (ZB _n , _k θ _n ) of the lens frame 501 are _obtained from Asking.

The bevel position information (ZE _n , _k θ _n ), the rim front position information (ZF _n , _k θ _n ), and the rim rear position information (ZB _n ,
_k θ _n ) is stored in the rim surface / bevel vertex memory 24.

Step S-5 (Creation of cross-sectional image information): As shown in FIG. 8 and FIG. 13A, the arithmetic / control circuit 21 sets the lens front refractive surface position information (F _n , _k ) stored in the lens data memory 22. θ _n ) and the lens rear side refractive surface position information (B _n , _k θ _n ), the lens edge thickness Δ _{n for} each moving radius
The determined from _{Δ n = B n -F n ·····} (11), the edge thickness information (Δ _{n, k} θ _n) the maximum edge thickness from delta _max and its radius vector angle of theta _1, the minimum edge thickness delta _min and its radial angle θ ₂ and the intermediate edge thickness _Δmid and its radial angle θ ₃ are determined.

Arithmetic / control circuit 21, the radius vector having a maximum edge thickness delta _max, in the example of FIG. 13B _{(k ρ G, k θ G} ), and the lens front refraction surface position F _G of the lens rear refraction surface position B _G and the radius having the minimum edge thickness Δ _min , ( _k ρ _d , _k θ _d ) in the example of FIG. 13B,
Radius with the lens front refraction surface position F _d and lens rear side refractive surface position B _d and the intermediate edge thickness delta _mid, in the example of FIG. 13B (
_{k ρ e, k θ e)} , to the input of the lens front refraction surface position F _e and the lens rear refraction surface position B _e to the image creation circuit 42, respectively.

Next, as shown in FIG. 13B, the arithmetic / control circuit 21
radius located on _k axis (hereinafter this is defined as a reference radius), in the example of FIG. 13B and the radius vector having a minimum edge thickness delta _min in this illustrated in _(k [rho _{d, k} theta _d) one The lens front refractive surface position _Fd is read from the lens data memory 22.

The arithmetic / control circuit 21 calculates the bevel position information (ZE _n , _k θ _n ), the rim front position information (ZF _n , _k θ _n ) and the rim rear surface position information (Z
B _{n, k θ n)} reads out the reference radius _(k ρ _{d, k θ} lens front refraction surface position _d) F _d and rim front position ZF _d of the lens frame 501 corresponding to the radius vector angle of _k theta _d And the radial angle _k θ of the radius ( _k ρ _G , _k θ _G ) having the maximum edge thickness Δ _max when
Bevel position ZE _{G of} lens frame 501 with _G as a common radial angle
And the rim front position ZF _G and the rim rear position ZB _G are obtained and input to the image creation circuit.

Similarly, the radius having the minimum edge thickness Δ _min ( _k ρ _d ,
The bevel position ZE _d of the lens frame 501, the rim front position ZF _d and the rim rear position ZB _d corresponding to _k θ _d ), and the intermediate edge thickness Δ _mid
The bevel position ZE _e , the rim front position ZF _e, and the rim rear position ZB _e of the lens frame 501 corresponding to the moving radius ( _k ρ _e , _k θ _e ) having the following are input to the image forming circuit 42.

Arithmetic / control circuit 21 further the shift amount _{Z = ZF G -F G = η} 1 both calculated from the rim front position ZF _G and the lens front refraction surface position F _G corresponding to the maximum edge Atsudo diameter, This value is entered in the “Z” column of the “MAX” display 431a of the display 41, and the radial angle θ ₁ = _k
θ _G is numerically displayed in “θ”.

Similarly, the arithmetic / control circuit 21 calculates the deviation Z = ZF _d −F _d = η ₂ between the rim front surface position ZF _d corresponding to the minimum edge thickness radial radius and the lens front refractive surface position F _d. This value is displayed in the “Z” column of the “MIN” display 431b of the display 41, and the radial angle θ ₂ = _k
θ _d is numerically displayed in “θ”.

Further, similarly, the arithmetic / control circuit 21 determines the rim front surface position ZF _e corresponding to the intermediate edge thickness radial radius and the lens front side refraction surface position F _e.
The deviation Z between them is calculated as Z = ZF _e −F _e = η ₃ , and this value is entered in the “Z” column of the “MID” display 431c of the display 41, and the radial angle θ _ε = _k θ _e is written as “ θ].

Step S-6 (display of cross-sectional image): The image creation circuit 42 reads out the schematic rim cross-sectional image 426 of the lens frame stored in the symbol image memory 43 in advance, and reads the maximum edge input from the arithmetic / control circuit 21. The bevel position ZE _G of the lens frame 501 corresponding to the thickness radius ( _k ρ _G , _k θ _G )
Rim section and the bevel apex 426a of the image 426 is located, positioned rim front 426b of the rim cross-sectional image 426 in rim front position ZF _G in,
It rim rear 426c of the rim cross-sectional image 426 in the rim rear position ZB _G is the image displayed on the display 41 a rim cross-sectional image 426 to be positioned.

Further, the image creation circuit 42 determines the maximum edge thickness radial radius ( _k ρ _G , _k
theta _G) to position the lens front index line 427a on the lens front refraction surface position F _G corresponding to said a schematic lens edge sectional image 427 by positioning the lens rear surface index line 427b on the lens rear side refractive surface position B _G An image is displayed on the display 41 adjacent to the rim cross-sectional image 426. Corresponding to the maximum edge thickness delta _max radius vector _{(k ρ G, k θ G} ), defined as the maximum edge cross-sectional image 431 of these rims sectional image 426 and the lens edge sectional image 427 as a set.

Similarly, the image creating circuit 42 displays the minimum edge cross-sectional image 432 and the intermediate edge cross-sectional image 433 on the display 41 as an image.
The image forming circuit 42 and the display 41 constitute a display means, and this step S-6 corresponds to a third step.

Step S-7 (Create Side Image Information): The arithmetic / control circuit 21 reads the radial information ( _k ρ _n , _k θ _n ) stored in the measured radial memory 23, as shown in FIG. 13B. Obtain the orthogonal projection of the radial length of the radius included in the I and II quadrants of the X _k -Y _k coordinate plane of the X _k -Y _k -Z _k coordinate system onto the X axis, and calculate the maximum of the I quadrant. A bevel corresponding to a radius belonging to a range of an angle の from _a radius ( _k ρ _a , _k θ _a ) for obtaining an orthogonal projection to a radius ( _k ρ _b , _k θ _b ) for obtaining a maximum orthographic projection in the second quadrant. location information
ZE _j , rim front position information ZF _j and rim rear position information ZB _j
(Where j = a, a + 1, a + 2,..., B−1, b) are read out from the rim surface / bevel vertex memory 24 and input to the image creation circuit 42.

Further, the arithmetic / control circuit 21, the lens front refractive surface located within the scope of the angle theta F _j and lens rear side refractive surface position B _j
(Here, j = a, a + 1, a + 2,..., B−1, b) is read out from the lens data memory 22 and input to the image creation circuit.

Step S-8 (side image display) image creation circuit 42, before the lens front refraction surface position is input F _j and the lens rear refraction surface position B _j in step 8
As shown in FIG. 13 and FIG. 13A, a lens edge side image 417a shown on the upper edge side after grinding of the lens L is displayed on the display 41. Also, an image of the upper rim bevel trajectory 417b of the lens frame 501 is displayed from the bevel position ZE _j , and the upper rim side image 417c of the lens frame 501 is displayed from the rim front position ZF _j and the rim rear position ZB _j. The image is displayed by overlapping with 417a.

In addition, the bevel end surface image 417d, 4 of the lens edge side image 417a
17d, the bevel apex 417e are imaged as respectively positioned bevel position ZE _j located in the bevel foot end 417f, 417f lens front refraction surface position F _j and lens rear side refractive surface position B _j.

These lens edge side images 417a, rim bean vertex locus
The 417b and the rim side image 417c have different types of display lines as shown in the example, or a color CRT is displayed on the display 4.
It is desirable to display each image in a different color using 1.

As shown in FIG. 8, the image creation circuit 42 includes an index image 418 with “MAX” notation for indicating the position of the maximum edge thickness radial radius ( _k ρ _G , _k θ _G ), Diameter ( _k ρ
_{d, k} theta _d) index position and index image 419 marked with "MIN" notation to indicate, denoted by "MID" notation to indicate an intermediate edge Atsudo径 _{(k ρ e, k θ e} ) position Image 420
The index image 421 with the notation “S” indicating the reference radial position can be superimposed and displayed on the display images 417a, 417b, 417c. In the illustrated embodiment, the index image 419 and the index image 421 match because the position of the minimum edge thickness radius vector and the position of the reference radius vector match.

The image creating circuit 42 further includes the frame shape measuring device 1
The bevel curve CF of the lens frame 501 stored in the data memory 612 is read out via the arithmetic / control circuit 21 and displayed on the bevel curve display unit 424 as a numerical value.

Step S-9 (Change Side Position): The arithmetic / control circuit 21 instructs the image creation circuit 42 to display a question message “Do you want to change the side position?” On the message display section 423 of the display 41.

Display images 417a, 417b, which are displayed on the display 41,
417c is an image of the lens and the lens frame rim viewed from the upper side. When the operator determines that the side position does not need to be changed, the operator operates the next stroke key 412 to execute the next step S412.
Move to -11.

For example FIG. 13B in the case of the lens frame as shown by two-dot chain line, since the maximum edge Atsudo径 _{(k ρ f, k θ f} ) is located in the quadrant IV of the X _k -Y _k coordinate plane, Its largest edge section image
Even if 431 is displayed on the display 41, this maximum edge thickness radial portion is not displayed in the upper side image display. This indicates that the index image 41 for indicating the maximum edge thickness radial position
The operator can easily determine from the fact that 8 is not displayed on the upper side image display.

Operator, when you want to see side image maximum edge Atsudo径 _{(k ρ f, k θ f} ) belongs proceeds to step S-10.

Step S-10 (side position designation): The operator operates the side position designation key 410 to designate a desired side position. The radius of the maximum edge thickness radius ( _k ρ _f , _k
To view the side image to which θ _f ) belongs, operate the “ear” key. The arithmetic / control circuit 21 receives this command and obtains X _k −Y _k
The above steps S-7 and S-8 are executed for the radials belonging to the quadrant I and the quadrant IV on the coordinate plane, and the lens edge side surface image 417a on the ear side, the rim bean vertex trajectory 417b, and the Lita side surface image
417c is displayed as an image.

Step S-11 (lens frame position change): The arithmetic / control circuit 21 outputs the message display section 42 of the display 41.
The operator instructs the image creating circuit 42 to display a question message “Do you want to change the lens frame position?” In 3. The operator operates the next stroke key 412 when it is determined that no change is required.

Upon receiving a command from the next stroke key 412, the arithmetic / control circuit 21 obtains the rim bevel position information (ZE _n , _k θ _n ) of the rim of the lens frame 501 stored in the rim surface / bevel vertex memory 24,
At the time of grinding the lens L, lens bevel apex positional information (ZK _n ,
_k θ _n ) is input to the lens bevel vertex memory 25 and stored.

When the operator wants to change the lens frame position, the process proceeds to the next step S-12.

Step S-12 (whole shift / part): As shown in FIG. 14, when the lens L is, for example, an intensity plus lens and a bevel cannot be formed on the edge cross section at the minimum edge radial position, the operator is required to Assuming that the entire lens frame is moved in the Z _k- axis direction with respect to the lens L or the curve of the lens frame 501 is changed, a part of the lens frame, that is, the minimum edge radial position, the maximum edge radial position, or the intermediate position Select whether to move the edge radial position.
When selecting "move whole", the operation shifts to the next step S-13 by operating the entire shift key 401 of the input / output keyboard 40. When selecting "partial movement", the partial shift key 411 is operated. , Next step S-1
Migrated to 5.

Step S-13 (shift amount input): By operating the "+" key 408 or the "-" key 409, the 15th
As shown in the figure, a movement amount α of the lens frame in the _Zk- axis direction is input.

Step S-14 (Rim Surface / Bevel Vertex Position Calculation): The arithmetic / control circuit 21 determines the rim front surface position information (ZF _n ,
_k θ _n ), the bevel vertex position information (ZE _n , _k θ _n ) and the rim rear surface position information (ZB _n , _k θ _n ) are read out, and the previous step S
With the movement amount α input at −13 Is calculated, and this is added to new rim front position information (ZF _n ′, _k θ
_n ), bevel vertex position information (ZE _n ′, _k θ _n ) and rim rear surface position information (ZB _n ′, _k θ _n ) are stored in the rim surface / bevel vertex memory 24, and the process returns to the next step S-5. Is done.

In the next step S-5, the new rim front position information (ZF _n ′, _k θ _n ) and the bevel apex position information (ZE _n ′,
_k θ _n ) and the rim rear surface position information (ZB _n ′, _k θ _n ) are used to create cross-sectional image information by the same operation as described above, and the subsequent steps S-6 to S-8 are executed. As shown in FIG. 15, the maximum edge cross-sectional image 431, the minimum edge cross-sectional image 432, the intermediate edge cross-sectional image (not shown), the lens edge side image 417a, the rim ridge vertex trajectory 417b, and the rim side image 41
7c is displayed as an image.

Also, from the new rim front surface position ZF _n ′ and the lens front side refraction surface position F _n , the deviation amounts Z = η ₁ ′ (maximum edge radial position), Z = η ₂ ′ = η ₂ −α (minimum edge movement) (Diameter position) is obtained and displayed.

Thereafter, the above-described steps S-9 to S-11 are similarly executed, and the operator is satisfied with the relative positional relationship between the lens L and the lens frame 501 after the “entire movement” in the present step S-11. Vertex position information (Z
When it is determined that the lens L may be ground by E _n ', _k θ _n ), the next stroke key 412 of the input / output keyboard 40 is operated to instruct the arithmetic / control circuit 21 to that effect.

When the arithmetic / control circuit 21 receives a command from the next stroke key 412, new bevel position information (ZE _n ′, _k θ _n ) of the lens frame rim stored in the rim surface / bevel vertex memory 24.
Is input to the lens bevel vertex memory 25 and stored as lens bevel vertex position information (ZK _n , _k θ _n ).

Step S-15 (shift position designation): To partially move the minimum edge radial position, the "MIN" key 403 of the input / output keyboard 40 is operated. To partially move the maximum edge radial position, the “MAX” key 402 is operated. To partially move the intermediate edge radial position,
Operate the "MID" key 404.

In the example of FIG. 14, since the user wants to partially move the minimum edge radial position, he operates the "MIN" key 403.

Step S-16 (shift amount input): By operating the "+" key 408 or the "-" key 409, for example, the _Zk- axis direction movement amount λ of the lens frame is input as shown in FIG.

Step S-17 (Rim Surface / Bevel Vertex Position Calculation): The arithmetic / control circuit 21 determines the minimum radius of the rim of the rim of the lens frame 501 stored in the rim surface / bevel vertex memory 24 in the example of FIG. The bevel vertex position ZE _m corresponding to ( _k ρ _m , _k θ _m ) is read out, and the previous step S-16
ZE _m '= ZE _m + λ... (13) is calculated with the movement amount λ input in step (13), and this is set as a new bevel vertex position ZE _m '.

The calculation / control circuit 21 then calculates the bevel apex position ZE of the rim of the lens frame 501 corresponding to the reference moving radius (the moving radius located on the Y _k- axis is referred to as ( _k ρ _s , _k θ _s )). By using _s and the same calculation as the above formulas (3) and (4) Find a new bevel curve CL.

The arithmetic / control circuit 21 further calculates the radius R of the bevel trajectory surface.
, New bevel vertex positions ZE _n ″ corresponding to all measured radials ( _k ρ _n , _k θ _n ) And the new rim front position ZF _n ″ and the rim rear position ZB _n ″ are calculated in the same manner as in the equations (9) and (10). From these new bevel vertex position information (ZE _n ″, _k
θ _n ), rim front position information (ZF _n ″, _k θ _n ) and rim rear position information (ZB _n ″, _k θ _n ) are stored in the rim surface / bevel vertex memory 24, and the next step S-5 is repeated. Will be returned.

In the next step S-5, the new rim front position information (ZF _n ″, _k θ _n ) and the bevel apex position information (ZE _n ″,
_k θ _n ) and the rim rear surface position information (ZB _n ″, _k θ _n ) are used to create cross-sectional image information by the same operation as described above, and subsequent steps S-6 to S-8 are executed to execute As shown in FIG. 16, the maximum edge cross-sectional image 431, the minimum edge cross-sectional image 432, the intermediate edge cross-sectional image (not shown), the lens edge side image 417a, the rim ridge vertex locus 417b, and the rim side image 4
17c is displayed as an image.

In addition, the deviation amount Z = η ₁ ″ (maximum edge radial position) and Z = η ₁ ″ = η ₂ −λ (minimum edge movement) from the new rim front surface position ZF _n ″ and the front lens refraction surface position F _n. (Diameter position) is obtained and displayed.

In addition, the new bevel curve calculated by equation (15)
CL is numerically displayed on the processed bevel curve display section 425 of the display 41.

Thereafter, the above-described steps S-9 to S-11 are similarly executed, and the operator is satisfied with the relative positional relationship between the lens L and the lens frame 501 after the "partial movement" in the current step S-11. Vertex position information after partial movement ”(Z
When it is determined that the lens L may be ground by E _n ″, _k θ _n ), the next stroke key 412 of the input / output keyboard 40 is operated to instruct the arithmetic / control circuit 21 to that effect.

The arithmetic / control circuit 21 converts the new bevel apex position information (ZE _n ″, _k θ _n ) of the lens frame rim stored in the rim surface / bevel apex memory 24 into lens bevel apex position information (Z
K _n , _k θ _n ) is input to the lens bevel vertex memory 25 and stored.

By the side display image 417 including the lens edge side image 417a, the rim bevel vertex trajectory 417b, and the rim side image 417c described above, when the operator puts the lens L after grinding into the lens frame 501, the lens L is removed from the lens frame rim. It is possible to predict in advance which radial position and how much to protrude forward and backward, and use the side display image 417 and the cross-sectional display images 431, 432, 433 to obtain lens bevel vertex position information for grinding the lens L. Can be determined and modified automatically.

Step S-18 (Processing): When the operator operates a processing command key (not shown), the arithmetic / control circuit 21 is based on the lens bevel vertex position information (ZK _n , _k θ _n ) stored in the lens bevel vertex memory 25. To grind the lens L.

The grinding operation is the same as the operation disclosed in the above-mentioned Japanese Patent Application No. 60-115079 and is described in detail in this application, so that the description is omitted here.

The operations described above are executed by being programmed in the program memory 26 in advance.

FIG. 18 is a schematic diagram showing another embodiment of the display method of the side image display of the display 41.

In the above embodiment, any one of the side images of “upper side”, “ear side”, “lower side” or “nose side” is selectively displayed. In the present embodiment, the grinding of the lens L is performed. In the developed image display, an image obtained by developing both the edge shape of the lens and the entire shape of the rim of the lens frame together on the entire periphery of the image obtained by viewing the expected shape after processing from the front of the lens is displayed. is there.

The figure shown by a two-dot chain line in FIG.
The expected shape after grinding of the lens L at the measuring radius vector information stored _{(k ρ n, k θ n} ) to.

The arithmetic / control circuit 21 reads out the bevel apex position information (ZE _n , _k θ _n ) of the lens frame rim from the rim surface / bevel apex memory 24 and outputs the reference bevel corresponding to the reference radius vector ( _k ρ _d , _k θ _d ). Vertex position ZE _d and bevel vertex position ZE _d corresponding to the other measured radials ( _k ρ _q , _k θ _q ) (here, q = 1, 2, 3,... D−
The difference π _q from (1, d + 1... N) is π _q = ZE _q −ZE _d ... (18) (where q = 1,2,3,... D−1, d + 1 ...
N), the reference bevel apex position ZE _d is defined to be located on the expected shape line indicated by the two-dot chain line, and this difference π _q is determined for each corresponding radial angle _k θ _q by the reference bevel apex position ZE. _This is added to _d to obtain a developed bevel vertex locus 811 and to display an image on the display 41 as shown in FIG.

Next, the arithmetic / control circuit 21 calculates the
The development rim front image 812 is arranged inside the development bevel vertex trajectory 811 and the development rim rear image 813 is arranged outside the development bevel apex trajectory 811 in parallel with 811 at an interval of a half ε / 2 of the rim thickness ε. To display the image.

The arithmetic / control circuit 21 further includes a lens data memory 22
Lens front refractive surface position information (F _n ,
_k θ _n ) and bevel vertex position information of the lens frame rim (ZE _n , _k θ
_n ) and positional information (B _n ,
_k θ _n ) and bevel vertex position information of the lens frame rim (ZE _n , _k θ
_n ) and the difference τ _n for each radial angle _k θ _n is given by μ _n = F _n −ZE _n ... (19) τ _n = B _n −ZE _n. Here, n = 1, 2, 3,... N) This difference μ _n is added to the developed bevel apex locus 811 for each corresponding radial angle _k θ _n , and the developed lens front refraction surface image 801 is obtained. The image is displayed on the display 41 as shown in FIG. Similarly, the difference τ _n is _obtained by expanding the bevel vertex locus 8 for each corresponding radial angle _k θ _n.
11 to obtain an image 802 of the rear refractive surface of the developed lens
The image is displayed on the display 41 as shown in the figure.

These developed lens front refracted surface image 801, developed lens rear refracted surface image 802, developed bevel vertex trajectory 811, developed rim front image 812, and developed rim rear image 813 are developed and displayed images 80
0 is configured.

Further, the index indices 419 to 421 described in step S-8 are combined and displayed on the developed display image 800.

Based on the developed display image 800 described above, the operator determines in advance which radial position the lens L protrudes back and forth at which radial position from the lens frame rim when the lens L after the grinding processing is placed in the lens frame 501. It is possible to predict and use the developed display image 800 and the cross-sectional display images 431, 432, 433 to automatically determine and correct the lens bevel apex position information for grinding the lens L.

In the embodiment described above, the lens frame shape measuring device, the lens shape measuring device, and the bevel position display device may be integrally formed with a ball-sliding machine having a processing part whose illustration and description are omitted. It may be electrically connected to the ball mill in an independent configuration.

In addition, instead of the lens frame shape measuring device, use a storage medium that stores the lens frame shape in advance, such as a floppy disk or IC card reader, or use an online system with a lens frame manufacturer or its agent. May be.

(Effects of the Invention) As described above, according to the bevel display method, the bevel display device, and the rubbing machine of the present invention, the expected edge cross-sectional image after grinding the lens having the predetermined edge thickness and the predetermined edge thickness And the cross-sectional image of the lens frame rim corresponding to the moving radius can be displayed by matching the respective bevel vertices.

For this reason, it is extremely easy to grasp the mutual positions of the lens frame rim and the lens edge, and the position determination of both is simplified.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a mechanical configuration of a lens frame shape measuring apparatus according to the present invention and a block diagram showing a circuit configuration thereof. FIG. 2 (A) is a perspective view showing a frame holding unit, FIG. 2 (B) and FIG. 2 (C) are longitudinal mid-section views for explaining the holding action of the frame holding device unit for holding the spectacle frame, and FIG. FIG. 3 (B) is a cross-sectional view thereof, FIG. 4 is a partially cutaway side view showing a sensor head portion, FIG. 5 is a schematic diagram showing a relationship for obtaining a geometric center of the lens frame from measured values, 6 (A) and 6 (B) are schematic diagrams for explaining how to obtain a rim bevel curve of the lens frame. FIGS. 7 (A) and 7 (B) are rim thicknesses of the lens frame. Frame support unit and support for explaining the operation of the lens frame shape measuring device for obtaining FIG. 8 is a block diagram showing a configuration of a range shape measuring device and a bevel position display device of the ball mill according to the present invention; FIG. 9 is a diagram of a lens shape measuring device and a bevel position display device; Flow chart for explaining the operation, FIG. 10 is a schematic diagram showing the relationship between the measured radius of the lens and the radius of the lens frame, and FIG. 11 is a diagram for obtaining the rim front position from the bevel apex position of the rim of the lens frame. FIG. 12 is a schematic diagram showing the relationship between the two, FIG. 12 is a schematic diagram for explaining the principle of measuring the front refractive surface position of the lens and the rear refractive surface position of the lens, and FIG. 13A is each component of the side display image and the cross-sectional display image. And FIG. 13B is a schematic diagram for explaining the relationship between the side display image and the cross-sectional display image of FIG. 13A and the measured radial direction, and FIG. 14 is a side display image. And a schematic diagram showing another example of the cross-section display image, FIG. 5 is a schematic diagram showing a change in the side display image and the cross-sectional display image of FIG. 14 when the entire lens frame is moved. FIG. 16 is a side view image and a cross-sectional display image of FIG. 14 when the lens frame is partially moved. FIG. 17 is a schematic diagram for explaining a developed bevel vertex locus, FIG. 18 is a schematic diagram showing an example of a developed display image, and FIG. 19 is another embodiment of a lens frame shape measuring device. FIG. 20 is a plan view showing an example, FIG. 20 is a sectional view taken along the line IIX-IIX ′ of FIG. 19, FIG. 21 is a plan view showing still another embodiment of the lens frame shape measuring device, FIG. It is IIXII-IIXII 'sectional drawing. DESCRIPTION OF SYMBOLS 1 ... Lens frame shape measuring device 3 ... Lens shape measuring device 4 ... Bevel position display device 21 ... Calculation / control circuit 40 ... Input / output keyboard 41 ... Display 42 ... Image creation circuit 43 ... Symbol image memory 100 ... Frame holding device 152, 1011 to 1013, 1021 to 1023 ... holding rod 156b ... stepped part 200 ... support device part 233 ... rim thickness detection device part 300 ... measuring part 417 ... side display image 431,432,433 ... cross-section display image 800 ... development display image 1001a, 1002a… Movable support rail inner surface

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁶ , DB name) G01B 21/00-21/32 G02C 13/00 B24B 9/14

Claims (5)

(57) [Claims] 1. A first step of inputting refraction surface position data of a spectacle lens framed in a lens frame rim of an eyeglass frame; a second step of inputting rim shape data of the lens frame rim; A third step of obtaining a cross-sectional image of the lens frame rim and a cross-sectional image of the eyeglass lens from the surface position data and the rim shape data, matching the two at a plurality of edge thickness portions, and displaying the plurality of images that match. And a bevel position display method. 2. The bevel position display method according to claim 1, wherein the plurality of images are at least two images of a maximum edge thickness portion, a minimum edge thickness portion, and an intermediate edge thickness portion of the eyeglass lens. . 3. An input means for inputting refraction surface position data of a spectacle lens to be framed in a lens frame rim of a spectacle frame and rim shape data of the lens frame rim, based on the refraction surface position data and rim shape data. A bevel position display device comprising: a display unit that matches both a cross-sectional image of a lens frame rim and a cross-sectional image of an edge of an eyeglass lens at a plurality of edge thickness portions, and displays the plurality of images that match. 4. The bevel position according to claim 3, wherein the plurality of images are at least two images of a maximum edge thickness portion, a minimum edge thickness portion, and an intermediate edge thickness portion of the spectacle lens. Display device. 5. A ball mill comprising the bevel position display device according to claim 3.