JPH116729A - Lens frame shape measuring apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To measure a correct shape of a lens frame, by grasping upper and lower rims of the lens frame with a part of holding bars from the direction of the thickness thereof to hold the lens frame without deforming or damaging the lens frame. SOLUTION: Fingers are inserted into hole parts parts 156e of sliders 156, and the mutual interval of the sliders 156 is widened to be depressed downward so that the interval between two holding bars 152 and step parts 156 b of the sliders 156 is widened against a springing force of a plate spring 154 together with a mobile base 153. A lens frame 501 desired to measure of a glass frame 500 is inserted to reduce the interval between the sliders 156 so that upper and lower rims contact the internal walls thereof 156. The frame is slid in so that almost the center of the upper rim of the lens frame 501 is located below the holding bars 152 and then, when an operator releases his hand from the sliders 156, the mobile base 153 rises by a springing force of the plate spring 154 to get the lens frame 501 clamped between the step parts 156 band the holding bars 152.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lens frame shape measuring device for measuring the shape of a lens frame of an eyeglass frame.

[0002]

2. Description of the Related Art In a conventional lens frame shape measuring device, a holding rod and a stepped portion of an abutting member (slider) that comes into contact with the lens frame from above and below in the thickness direction of the lens frame of the spectacle frame. The lens frame was pinched and held.

[0003]

However, since the lens frame is curved, the position where the lens frame is pressed by the holding rod and the position where the lens frame contacts the stepped portion often shift. For this reason, the rim of the lens frame that comes into contact with the stepped portion receives a planar contact force, that is, receives the pressing force in the direction in which the curved shape of the lens frame becomes flat from the holding rod, There is a possibility that the lens frame may be deformed or damaged.

Accordingly, the present invention has been made to solve the above-mentioned object.
It is an object of the present invention to provide a lens frame shape measuring device capable of holding a lens frame without deforming or damaging the lens frame and capable of measuring an accurate shape of the lens frame.

[0005]

In order to achieve this object, a first aspect of the present invention is a lens frame shape measuring apparatus for measuring the shape of a lens frame by bringing a bevel filler into contact with a bevel groove of a lens frame of an eyeglass frame. , A lens frame shape measuring device having a pair of holding rods for holding upper and lower rims of the lens frame from the thickness direction thereof.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a ball mill according to the present invention will be described below.

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 section has the same configuration and operation as the above-mentioned Japanese Patent Application No. 60-115079, and is not directly related to the present invention.

A. First, an embodiment of a lens frame shape measuring device 1 of the present invention is shown in FIG.
This will be described with reference to FIG.

The construction and operation of the lens frame shape measuring apparatus 1 excluding a rim thickness measuring means described later are described in detail in the above-mentioned Japanese Patent Application No. 63-63,197.
No. 123593.

[0010] The present device is roughly divided into three parts:
A frame holding device unit 100 for holding a frame, a supporting device unit 200 for supporting the frame holding device unit 100, transferring the holding device unit to a measurement surface and moving the holding device unit in the measurement surface, and glasses. The measurement unit 300 digitally measures the shape of the lens frame of the frame.

The support unit 200 has a movable stage 203 that can be moved in a vertical direction (X-axis direction of a measurement coordinate system) on a housing (not shown). On the lower surface of the moving stage 203, a female screw part 204 is formed.
4 is screwed with an X-axis feed screw 205. This X
The shaft feed screw 205 is an X-axis motor 2 composed of a pulse motor.
06. Thereby, the moving stage 203
Is moved in the X-axis direction.

A guide shaft 208 extends between flanges (not shown) of the moving stage 203 in parallel with the Y-axis direction of the measurement coordinate system.
09 to rotate.

The guide shaft 208 has hands 211 and 212
Are slidably supported.

The hand 211 has two slopes 215 and 216 intersecting each other as shown in FIG. 3B, and the hand 212 similarly has two slopes 217 and 21 intersecting each other.
Eight. Both slopes 217, 218 of hand 212
The ridge line 220 created by the slope 211, 216 of the hand 211
The angle between the slopes 217 and 218 and the slope 2 so as to be in parallel with the ridge line 219 formed by
The angles 15 and 216 are equal to each other. A spring 230 is stretched between the hands 211 and 212 as shown in FIG.

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

A rim thickness detecting head 231 is provided on the lower surface of the hand 211 and a magnescale 232 is provided on the lower surface of the hand 212.
Are fixedly attached, and the hand 211 and the hand 21
The configuration is such that a change in the interval of 2 can be measured by the scale 232 and the detection head 231.

The detection head 231 and the magnescale 232 constitute a rim thickness detection unit 233. An output signal output from the detection head 231, that is, a detection result is input to the arithmetic circuit 613 via the counter 606.

The measuring section 300 includes a sensor arm rotating motor 301 mounted on the lower surface of a housing (not shown) and a sensor arm portion 302 rotatably supported on the upper surface of the housing.
Consists of A belt 305 is stretched between a pulley 303 attached to a rotation shaft of the motor 301 and a rotation shaft 304 of the sensor arm, and the rotation of the motor 301 is transmitted to the sensor arm 302.

The sensor arm section 302 has a base 31
0, two rails 311 and 311 are provided above the sensor head 3.
12 is slidably mounted. Sensor head 3
A magnetic scale read head 313 is attached to one side surface of the base 310, whereby a rail 311 is attached to the base 310.
It is configured to read a magnetic scale 314 attached in parallel with the sensor and detect the amount of movement 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 of the arm end is fixed to the other side of the sensor head 312.

FIG. 4 shows the structure of the sensor head portion 312. A shaft hole 351 is formed in the slider 350 supported by the rail 311 in the vertical direction.
Is inserted with a sensor shaft 352. Sensor axis 35
A ball bearing 353 held on the sensor shaft 352 is interposed between the shaft hole 351 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.

An arm 355 is provided at the center of the sensor shaft 352.
At the upper part of the arm 355, a bevel filler 356 in the shape of a solo bang that comes into 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 read head 359 of a sensor 358 made of, for example, a magnescale for measuring the amount of movement of the sensor shaft in the vertical axis direction, that is, the amount of movement in the Z axis direction, is mounted. 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 structure of the frame holding unit 100 will be described with reference to FIG.

The sides 151a, 151a of the fixed base 150
The frame holding rods 152 and 152 are screwed to the center of both side flanges 151 and 151 having the following. A movable base 153 having sides 153a and 153a is inserted between the bottom plate 150a of the fixed base 150 and the flange 151. The movable base 153 is composed of two leaf springs 154 and 154 attached to the bottom plate 150a of the fixed base 150. Fifteen
4 supported.

The movable base 153 is formed with two parallel guide grooves 155, 155.
A pair of projecting legs (not shown) provided on each of the sliders 156 and 156 is engaged with the
6, 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)
6, 156 are inserted into slots 156c (the other not shown) formed in the stepped portions 156b, 156b.

Further, vertical notches 156d, 156d are formed at the centers of the sliders 156, 156, and the above-mentioned frame holding rods 152, 152 can be inserted into the notches 156d, 156d, respectively. . Further, 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 apparatus will be described with reference to FIGS. 2A, 2B and 2C and FIGS. 3A and 3B.

First, as shown in FIG. 2A, a finger is inserted into holes 156e, 156e of the sliders 156, 156, and the gap between the sliders 156, 156 is sufficiently opened.
And pressing downward, together with the movable base 153, the two holding rods 152 and the stepped portions 156b, 156b of the sliders 156, 156 against the resilience of the leaf springs 154, 154.
Leave enough space between

Thereafter, the eyeglass frame 5 is set within this interval.
00, insert the lens frame 501 to be measured. The upper rim and the lower rim of the lens frame 501 are the sliders 156, 1
Sliders 156 and 156 so as to contact the inner wall of 56
The interval between In this embodiment, the slider 15
6, 156 has the connection structure by the ring 158 as described above, so that the movement amount of one of the sliders 156, 156 gives the same movement amount as the other slider.

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, the operator releases the sliders 156 and 156, and the movable base 153 is released. Rises due to the elastic force of the leaf springs 154 and 154, and the lens frame 501 is
The frame 500 is held between the 156b and the holding rods 152 and 152, and the frame 500 is held so that the geometric center point of the lens frame 501 and the center point of the circular opening 157 of the frame holding device 100 substantially coincide with each other.

At this time, the flange 151 of the fixed base 150 extends from the vertex 501a of the beveled groove of the lens frame 501.
Of the movable base 153 with the distance d to the side 151a
The distance d to 3a is configured to have the same value.

Next, after inserting the frame holding device section 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. Let it. The rotation of the Y-axis motor 224 drives the mini cheer belt 226, moves the hand 211 to the left by a certain 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 sides 151a and 151a of the flange 151 of the fixed base 150 of the frame holding unit 100 abut against the slope 215 of the hand 211 and the slope 217 of the hand 212, respectively, and both sides 153 of the movable base 153.
a and 153a are respectively in contact with the slope 216 of the hand 211 and the slope 218 of the hand 212.

In this embodiment, as described above, the side 151a and the side 15a extend from the bevel groove 501a of the spectacle frame 501.
Since the distance d to each of the 3a is equal to each other, when the frame holding device 100 is sandwiched between the hands 211 and 212, the bevel groove apex 501a of the lens frame 501 is positioned on the reference plane S formed by the ridge lines 219 and 220 of both hands. Automatically located.

Next, by rotating the guide shaft rotating motor 209 at a predetermined angle, the frame holding device section 100 is moved to the position shown in FIG.
To the position indicated by the two-dot chain line. 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 hold the hands 211 and 211 holding the frame holding unit 100.
12 is moved in the Y-axis direction by a fixed amount, so that the center point of the circular opening 157 of the frame holding device unit 100 and the center of the rotating shaft 304 of the measuring unit 300 are approximately aligned. 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,
Lens frame shape is (ρ _n , θ _n ) (n = 1, 2, 3,... N)
It is measured as

Here, the first measurement is performed by making the center O of the rotation axis 304 substantially coincide with the geometric center of the lens frame 501 as described above and shown in FIG. is there.

In the second measurement, the data having the maximum value in the X-axis direction is obtained from the data (X _n , Y _n ) obtained by converting the first measurement data (ρ _n , θ _n ) from polar coordinates to rectangular coordinates. Measurement point B
(X _b , Y _b ), the measured point D (X
_d , Y _d ), the measured point A (X _a ,
Y _a ) and the measured point C (X _c , Y
_c ) and select O _{0 in} the geometry of the lens frame,

[0042]

[Formula 1] Then, the X-axis motor 206 and the Y-axis motor 224 are driven based on the X ₀ and Y ₀ values,
By moving the frame holding device portion 100 sandwiched between 1 and 212, the geometric center O0 of the lens frame 501 is made to coincide with the rotation center O of the sensor arm 302, the lens frame shape is measured again, and the geometric center O measurement values in the _{0 (0 ρ
n} , ₀ θ _n ) (n = 1, 2, 3,..., N).

When measuring the shape of the lens frame based on the geometric center O ₀ , the amount of movement of the sensor head 312 in the Z-axis direction is simultaneously measured by the sensor 358. Thus eventually lens frame shape _{(0 ρ n, 0 θ n} ) (n = 1,2,
3,... N) three-dimensional information is obtained.

As shown in FIG. 7B, the hands 211,
When the frame 212 holds the frame holding device 100, the rim thickness detection head 231 detects the amount of movement (measurement interval) h of the magnescale 232 and inputs the detected amount to the arithmetic circuit 613.

FIG. 7A shows the reference interval H between the hands 211 and 212 when the frame 211 is held between the hands 211 and 212 in a state where the spectacle frame 500 is not set in the frame holding device 100. As shown in (1), it is already known in design and 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 Г,

[0047]

[Formula 2] In this embodiment, since Г = 45 °, the rim thickness ε is eventually calculated by the arithmetic circuit 613 as ε = h−H (2), and the display 41 (described later) This is displayed on the rim thickness display section 422 of FIG. 8).

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

The driver circuits 601 to 604 include an X-axis motor 206, a Y-axis motor 224, a sensor arm rotation shaft motor 301, and a guide shaft rotation motor 20 respectively.
9 is connected. The drivers 601 to 604 control the pulse generator 60 under the control of the sequence control circuit 610.
The rotation drive of each pulse motor is controlled in accordance with the number of pulses supplied from 9.

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 is used as a set ( ρ _n , θ _n ) is input to the data memory 611 and stored.

Next, the arithmetic circuit 613 sends the first radial information (ρ _n ,
The geometric center O ₀ of the lens frame 501 is calculated based on θ _n ), and the data is input to the sequence control circuit 610. The sequence control circuit 610 obtains X ₀ and Y ₀ from the above equation (1) based on the data from the arithmetic circuit 613, and inputs the required number of pulses to the drivers 601 and 603 to drive the motors 206 and 224. , The center of the lens frame 500 coincides with the rotation center of the sensor arm 302.

At the same time, the sequence control circuit 610
Command the counter circuit 615 to count the data from the Z-axis sensor 358. And again Z
Lens frame shape information ( ₀ ρ _n , ₀ θ _n , Z
_n ) is measured, and this data is stored in the data memory 611.

[0053] From Z _n information of the lens frame shape information stored in the data memory _{611 (0 ρ n, 0 θ} n, Z n), the curve value c of the lens frame can be obtained by the arithmetic circuit 613 as required .

As shown in FIGS. 6 (A) and 6 (B), the calculation is performed at least at two points a and b on the lens frame at the moving radiuses ρ _A and ρ _B, and at the two points, the sensor head in the Z-axis direction. From Z _A and Z _B , the radius of curvature R of the sphere SP including the bevel locus of the lens frame 501 is calculated.

[0055]

[Equation 3] From the obtained R.

[0056]

(Equation 4) And its 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 includes:
The above formula (2) is calculated from the reference interval H previously stored in the reference value memory 607 and the input measurement interval h to determine the rim thickness, and this is stored in the data memory 612.

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

FIGS. 19 and 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 that of the above-described embodiment, and therefore the description is omitted.

The movable support rails 1001 and 1002 are movably supported on a guide rail 1007, and are approached to each other by feed screw members 1003 formed with feed screws 1004 and 1005 whose feed directions are opposite to each other and rotated by a motor 1006. -Be separated.

The pedestal 10 is provided in the movable support rail 1001.
32, 1033 are housed so as to be able to move up and down along a guide rail (not shown). The pedestals 1032, 1033 are formed with feed screws 1035, 1036 having feed directions opposite to each other, and are driven by a motor 1037. The members 1034 approach and separate from each other. Pedestal 1032
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 101
1, 1012 are fixedly inserted into a pair of slots 1024 (the other is not shown) formed in the movable support rail 1001 and projected 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 other is not shown), and protrude out of the support rail 1001.

In the movable support rail 1002, the pedestal 10
42, 1043 are accommodated so as to be able to move up and down along a guide rail (not shown), and pedestals 1042, 1043 are formed with feed screws 1045, 1046 having feed directions opposite to each other, and are feed screw members which are rotationally driven by a motor 1047. 1
044 approach and move away from each other. 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.

The pedestal 1041 has one holding rod 1013
Is inserted into a slot 1026 formed in the movable support rail 1002 and protrudes out of the movable support rail 1002. The pedestal 1043 has one holding rod 1023
And is 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, which is, for example, a potentiometer, is attached to the pedestal 1043. The relative movement amount in the direction is detected. Contact 1049 and detector 10
50 constitutes the rim thickness detection device section 233.

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

A pair of holding bars 1021 (the other is not shown) of the movable supporting rail 1001 and a pair of holding bars 1
023, and drives the motor 1006 to bring the movable support rails 1001 and 1002 close to each other so that the lens frame 5
The upper and lower rims of 01 are brought into contact with the inner surfaces of the support rails 1001 and 1002, respectively. Next, the motors 1037 and 1037
47 is driven to lower the holding rods 1011, 1012 and 1013 to cooperate with the corresponding holding rods 1021 (not shown) and 1023 to hold and hold the rim. At this time, the distance between the holding bar 1013 and the holding bar 1023 is
The detection result is converted into a rim thickness ε by the arithmetic circuit 613.

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

The movable support rail 1001 has a feed screw 1103 rotated by the operation of the feed handle 1104, and the stopper 1105 can move along the longitudinal direction of the movable support rail 1001 by the rotation. I have. The tip of the stopper 1105 protrudes outside the movable support rail 1001 through a slot (not shown). Also, the inner side surface 1001 of the movable support rail 1001
The support protruding side 1111 is formed in a.

The movable support rail 1002 has a feed screw 1106 which is rotated by operating the feed handle 1107. The feed screw 1106 is formed with feed screws (not shown) whose feed directions are opposite to each other. Stoppers 1108 and 1109 are screwed into each feed screw, and by rotating the feed handle 1107, the stopper 1
Reference numerals 108 and 1109 are configured to be movable along the longitudinal direction of the movable support rail 1002 so as to approach and 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. The movable support rail 10
A support protruding side 1112 is formed on the inner side surface 1002a of the second member 02.

In the movable support rail 1002,
The movable piece 1121 having the inclined surface 1121a is housed so that the tip end thereof protrudes 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 1 is provided at the lower end of the movable piece 1121.
The movable piece 1121 is constantly pulled downward. The movable piece 1121 has a contact 1149
The contact 1149 is in contact with a detector 1050, such as a potentiometer, attached to the inner surface of the movable support rail 1002.
21 is detected.

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

The front face of the rim of the lens frame 501 of the spectacle frame 500 abuts against the supporting protruding sides 1111 and 1112,
The upper and lower surfaces of the rim are movable support rails 1001, 100
2 so that the movable support rails 1001 and 1002 are held by the motor 10 so as to be held between the inner surfaces 1001a and 1002a.
06 are driven closer together. Stopper 1105
Reference numerals 1108 and 1109 are used to define the position of the lens frame 501 in the left-right direction, and hold the rim from the lateral direction.

The movable piece 1121 is moved upward against the pulling 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 the arithmetic circuit 613 reduces the moving amount to the rim thickness ε. Is converted.

B. Lens shape measuring device 3 in FIG. 8 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 which is moved back and forth by driving a pulse motor 36.
The stage 31 is provided with feelers 32 and 34 capable of holding the lens L to be measured. The feelers 32 and 34 are urged by springs 38 and 38 in directions approaching each other, and are configured to always hold the lens L. I have.

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

[0077] lens measuring radius vector information from the measuring radius vector memory _{23 (k ρ n, k θ} n) ( here, n = 1,2,3, ···
N), the angle information kθn is input to the arithmetic / control circuit 21. The arithmetic / control circuit 21 supplies the pulse of the pulse generator 27 to the driver circuit 37A based on the information, and moves the pulse motor 37 from the reference position. and it is configured to rotate the angle _k theta _n. On the other hand, the radial length information _k ρ _n is similarly input to the arithmetic / control circuit 21, and the arithmetic / control circuit 21 outputs the pulse of the pulse generator 27 to the driver circuit 36 based on the information.
A, and drives the pulse motor 36 to move the tips of the feelers 32, 34 back and forth through the stage 31 to move the lens L from the optical axis O (the rotation axis of the lens rotation axes 4 and 4) to the radial length _k ρ. It is configured to be located at a position associated with _n .

The meaning of the lens measurement radius information ( _k ρ _n , _k θ _n ) and the calculation method thereof will be described later in the section of operation description.

At this position, the amount of movement F _n of the feeler 32 (where n = 1, 2, 3,... N) is detected by the encoder 33, and this is calculated / calculated as lens front refractive surface position information. Lens data memory 2 via control circuit 21
Store it in 2.

Similarly, the amount of movement F _n (here, n = 1, 2, 3,... N) of the feeler 34 at this position is detected by the encoder 35, and this is detected by the encoder 35. Is stored in the lens data memory 22 via the arithmetic / control circuit 21.

C. The bevel position display device 4 includes a calculation / control circuit 21 and an input / output keyboard 40 connected thereto, a lens data memory 22, a measurement radial memory 23, a rim surface / bevel vertex memory 24, and a lens bevel vertex memory. 25, image creation circuit 4
2 and a symbol image memory 43 and a program memory 26 connected thereto.

The input / output keyboard 40 has a display 41 such as a liquid crystal display or a CRT for displaying an image of a bevel position or the like and numerical display of input / output data, and various input keys 401 to 413 described later. doing.

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, upward shift amount)
Input): The operator inputs the FPD key 4 of the input / output keyboard 40
5 is operated to display the reference value of the frame PD, ie, the distance between the lens frame geometric centers of the spectacle frames, that is, the reference value of the frame PD, which is stored in advance in an internal storage circuit (not shown) inside the arithmetic / control circuit 21. It is displayed on the 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 presses the “+” key 408 of the input / output keyboard 40.
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.

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, by referring to the “PD” of the display 41. ”Is displayed on the display unit 415.

When the PD value of the wearer of the eyeglass frame 500 to be framed this time is different from the reference PD value, the operator operates the “+” key 408 or the “−” key 409 to change the display value to a desired value. Value, and press the “Set” key 41
3 is stored in the internal storage circuit.

Next, after the operator operates the “up” key 407 of the input / output keyboard 40, the “+” key 408
To set the desired upward alignment amount UP in the “upward alignment” display section 41.
6 is displayed, and the “set” key 413 is operated to store the data in the internal storage circuit.

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

Next, the arithmetic / control circuit 21 obtains lens frame shape information having the origin at the geometric center O of the lens frame 501 of the eyeglass frame 500 measured by the frame shape measuring device 1 and stored in the data memory 611. ( ₀ ρ _n , ₀ θ _n ,
₀ Z _n ) (where n = 1, 2, 3,... N). The read-out lens frame radial information ₀ of the i-th measurement point
_{P i (0 ρ i, 0} θ i) a as shown in FIG. 10 X ₀ -Y ₀ -Z ₀
Coordinates are converted to coordinates in the coordinate system,

[0091]

(Equation 5) _{0 P i (0 X i,} 0 Y i) a determined, the inset amount IN partial measurement points ₀ P _i to X ₀ axially from the origin O _O, Y ₀ the upper inset in the axial direction UP partial origin O _k is the X _k -Y _k -Z _k coordinate system i-th machining point _k P _i that are moving, the coordinates

[0092]

(Equation 6) As

Then, this is again used as the lens measurement radius P _i ( _k ρ _i , _k θ _i ) having the origin O _k as the origin.

[0094]

[Formula 7] Perform coordinate transformation. This series of coordinate transformation is performed from the first measurement point P ₁ by the arithmetic / control circuit 21 to the n measuring points P _n,
These measured radial information ( _k ρ _n , _k θ _n ) (where n = 1,
.., 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 of the lens coincides with the rotation axes of the lens rotation axes 4 and 4. So that

The calculation / control circuit 21 is provided with the measurement radial memory 2
3 of the lens-measuring radius vector information _{(k ρ n, k θ n} ) from the read angle information _k theta _n, the pulse generator based on the information 27
The pulse is supplied to the driver circuit 37A, rotating angle _k theta _n the pulse motor 37 from the reference position. At the same time, radial length information _k ρ _n is also input to the arithmetic / control circuit 21,
Based on the information, the pulse of the pulse generator 27 is supplied to the driver circuit 36A, the pulse motor 36 is driven, and the front ends of the feelers 32, 34 are moved back and forth through the stage 31, so that the optical axis O of the lens L (lens rotation). axes 4,4 from the axis of rotation) is located at the position of the radius vector length _{k ρ n -γ.}
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 movement amount F _n of the feeler 32 at this position (where n = 1, 2, 2,
3, the · · · N) detected by the encoder 33, through the arithmetic / control circuit 21 as the lens rotation angle _k theta _n and by corresponding lens front refraction surface position information of the _{L (F n, k θ n} ) Stored in the lens data memory 22.

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 detected by the rotation angle _k θ of the lens L. _n and via the arithmetic / control circuit 21 as to correspond to the lens rear refraction surface position information (B _{n, k} θ _n) lens data memory 2
Store it in 2.

Step S-4 (rim surface / bevel top performance)
Arithmetic): The arithmetic / control circuit 21 is the frame shape measuring device 1
In bevel position information of the measured rim of the geometrical center O ₀ of the lens frame 501 stored in the data memory 611 as the origin _{(0 ρ n, 0 θ n} , 0 Z n) ( where, n =
1, 2, 3,... N) and read out the i-th measurement point ₀
The bevel apex position ₀ Z _i of the P _{i in} the Z ₀ axis direction is defined as the i-th measurement point ₀
To associated as X _k -Y _k -Z _k coordinate system i-th machining point _k P _i of Z _k axis direction of the bevel apex position ZE _i that corresponds with the P _i.
This series of correspondence first machining point _k P _i to N-th processing point
performed for _{k P n, X k -Y k} -Z k of the lens frame 501
Bevel vertex position information in the coordinate system (ZE _n , _k θ _n )
(Here, n = 1, 2, 3,... N) is obtained. still,
X ₀ -Y ₀ -Z ₀ Z coordinate Z ₀ of the origin O ₀ of the coordinate system and X _k -Y _k
The Z coordinate Z _k of the origin O _k of the −Z _k coordinate system matches as shown in FIG.

Next, the arithmetic / control circuit 21 reads the rim thickness ε of the lens frame 501 measured by the frame shape measuring device 1 and stored in the data memory 612 as shown in FIG. Based on ε and the bevel apex position information (ZE _n , _k θ _n ), rim front position information (ZF _n , _k θ _n ) and rim rear position information (ZB _n , _k ) of the lens frame 501 are _obtained.
θ _n ) and

[0101]

(Equation 8) Asking.

These bevel 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 2.
4 is stored.

Step S-5 (Creation of cross-sectional image information): As shown in FIGS. 8 and 13A, the arithmetic / control circuit 21 sets the lens front refractive surface position information ( F _{n, k} θ _n) because the lens rear side refractive surface position information (B _{n, k θ n)} to respective dynamic each diameter edge thickness delta _n of the lens _{Δ n = B n -F n ···} (11 ) From the edge thickness information (Δ _n , _k θ _n ), the maximum edge thickness Δmax and its radial angle θ ₁ , the minimum edge thickness Δmin and its radial angle θ _2, and the intermediate edge thickness Δmid and its radial angle the θ ₃ seek.

The arithmetic / control circuit 21 calculates the maximum edge thickness Δmax
In the example of FIG. 13B, ( _k ρ _c , _k θ _c )
A lens front refraction surface position F _c of the lens rear side refractive surface position B _c, the radius vector having a minimum edge thickness .DELTA.min, in the example of FIG. _{13 (B) (k ρ d} , k θ d), the lens front radius having a refractive surface position F _d and lens rear side refractive surface position B _d and the intermediate edge thickness Derutamid, in the example of FIG. _{13 (B) (k ρ e} , k θ e), the lens front refraction surface position F _e of by entering the lens rear side refractive surface position B _e to the image creation circuit 42, respectively.

Next, the operation / control circuit 21 operates as shown in FIG.
As shown in (B), (defined as the following which the reference radius) radial positioned on Y _k axis, in the example of FIG. 13 (B) _(k
ρ _d , _k θ _d ), the lens front side refraction surface position F _d corresponding to the moving radius having the minimum edge thickness Δmin in this example is read from the lens data memory 22.

The arithmetic / control circuit 21 stores the bevel position information (Z) of the lens frame 501 from the rim surface / bevel vertex memory 24.
E _{n, k} θ _n) and reads the rim front position information (ZF _{n, k θ n)} and the rim rear position information _{(ZB n, k θ n)} , the reference radius _{(k ρ d, k θ d} ) of the lens rim front position Z of the lens frame 501 and the corresponding front refracting surface position F _d to the radius vector angle of _k theta _d
When is matched with the F _d, bevel position of the lens frame 501 to the radius vector angle degree _k theta _c common radius vector angle of the radius vector _{(k ρ c, k θ c} ) having a maximum edge thickness .DELTA.max ZE _c And rim front position Z
Each of F _c and the rim rear surface position ZB _c is obtained and input to the image creation circuit 42.

Similarly, the radius ( _k) having the minimum edge thickness Δmin
bevel position Z of the lens frame 501 corresponding to ρ _d , _k θ _d )
E _d and rim front position ZF _d and rim rear position ZB _d, and the radius vector having an intermediate edge thickness Δmid bevel position of the lens frame 501 corresponding to the _{(k ρ e, k θ e} ) ZE e rim front position Z
Inputting the F _e and rim rear position ZB _e to the image creation circuit 42.

[0108] arithmetic / control circuit 21 further rim front position ZF from the _c and the lens front refraction surface position F _c of both displacement amount _{Z = ZF c -F c = η} 1 corresponding to the maximum edge Atsudo diameter This value is calculated, and the radial angle θ ₁ = _k θ _c is numerically displayed as “θ” in the “Z” column of the “MAX” display 431 a of the display 41.

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. Is calculated, and the radial value θ ₂ = _k θ _d is numerically displayed as “θ” in the “Z” column of the “MIN” display 431b of the display 41.

Further, similarly, the arithmetic / control circuit 21 calculates the deviation Z = ZF _e −F _e = of the rim front surface position ZF _e and the lens front side refraction surface position F _e corresponding to the intermediate edge thickness radial radius.
η ₃ is calculated, and this value is displayed on the display 41 as “MID” display 4
In the “Z” column of 31c, the radial angle θ ₃ = _k θ _e is numerically displayed as “θ”.

Step S-6 (display of cross-sectional image): The image forming circuit 42 reads out a schematic rim cross-sectional image 426 of the lens frame stored in the symbol image memory 43 in advance, and is input from the arithmetic / control circuit 21. and the bevel apex 426a of maximum edge Atsudo径 _{(k ρ c, k θ c} ) of the lens frame 501 corresponding to the bevel position ZE _c rim cross-sectional image 426 is positioned, the rim cross-sectional image 426 in rim front position ZF _c The rim cross-sectional image 426 is displayed on the display 41 such that the rim front surface 426b is positioned and the rim rear surface 426c of the rim cross-sectional image 426 is positioned at the rim rear surface position ZBc.

Further, the image forming circuit 42 determines the position F _{c of the} front lens refraction surface corresponding to the maximum radius of the edge thickness ( _k ρ _c , _k θ _c ).
Image positions the lens front index line 427a, the display unit 41 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 _c is adjacent to the rim cross-sectional image 426 indicate. The rim cross-sectional image 426 and the lens edge cross-sectional image 427 corresponding to the maximum edge thickness Δmax radial radius ( _k ρ _c , _k θ _c ) are defined as a maximum edge cross-sectional image 431 as a set.

The image forming circuit 42 similarly displays the minimum edge section image 432 and the intermediate edge section image 433 on the display 4.
1 is displayed as an image.

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 measurement radial memory 23 and reads it out as shown in FIG. )
As shown in the above, the orthogonal projection of the radial length of the radial direction 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 is obtained. From the radius ( _k ρ _a , _k θ _a ) to obtain the maximum orthographic projection in the I quadrant, the radius (
_{k ρ b, k θ b)} to the bevel position information corresponding to the radius belonging to the range of the angle theta ZE _j and 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 from the rim surface / bevel vertex memory 24 and input to the image creation circuit 42.

Further, the arithmetic / control circuit 21 determines whether the front lens refracting surface position Fj and the rear lens refracting surface position B _j (j = a, a + 1, a + 2,
.., B-1 and b) are read out from the lens data memory 22 and input to the image creation circuit 42.

[0116] 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, FIGS. 8 and 13 ( As shown in A), a lens edge side image 417a showing the edge edge of the upper edge of the lens L after the grinding process is displayed on the display 41. Also, bevel position ZE _j
From the top of the lens frame 501 to the limb vertex locus 417
b is displayed as an image, and the rim side image 417c on the upper side of the lens frame 501 is superimposed on the lens edge image 417a from the rim front position ZF _j and the rim rear position ZB _j to be displayed.

Note that the bevel edge images 417d and 417d of the lens edge side image 417a are
e is located at the bevel position ZE _j and its bevel foot end 417
f, 417f are imaged as respectively located on the lens front refraction surface position F _j and lens rear side refractive surface position B _j.

The lens edge side image 417a, the rim bevel vertex locus 417b, and the rim side image 417c
It is desirable that the type of display line be different as shown in the example, or that each image be displayed in a different color using the display 41 on a color CRT.

As shown in FIG. 8, the image forming circuit 42 includes an index image 418 with “MAX” notation for indicating the position of the maximum edge thickness radial radius ( _k ρ _c , _k θ _c ) and the minimum edge thickness. “MI” for indicating the position of the thick radial ( _k ρ _d , _k θ _d )
The index image 419 with the notation “N”, the index image 420 with the notation “MID” for indicating the position of the intermediate edge thickness radial ( _k ρ _e , _k θ _e ), and the “S” indicating the reference radial position The index image 421 with the notation can be superimposed and displayed on the display images 417a, 417b, and 417c. In addition, since the position of the minimum edge thickness radius and the reference radius match in the illustrated embodiment, the index image 4
19 and the index image 421 match.

The image forming circuit 42 further calculates the bevel curve CF of the lens frame 501 stored in the data memory 612 of the frame shape measuring device 1 by using the arithmetic / control circuit 21.
And numerically displayed on the bevel curve display unit 424.

Step S-9 (side position change): calculation /
The 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.

The display images 417a, 417b, and 417c displayed on the display 41 are images of the lens and the lens frame rim viewed from above, and when the operator determines that the side position does not need to be changed, The operator sets the next stroke key 4
12 is operated to move to the next step S-11.

For example, in the case of a lens frame as shown by a two-dot chain line in FIG. 13B, its maximum edge thickness radial radius ( _k ρ _f , _k
θ _f ) is located in the fourth quadrant of the X _k -Y _k coordinate plane, so that even when the maximum edge cross-sectional image 431 is displayed on the display 41, the maximum edge thickness radial portion is displayed in the upper side image display. Is not displayed. This can be easily determined by the operator because the index image 418 for indicating the maximum edge thickness radial position is not displayed on the upper side image display.

[0124] The operator, maximum Koba Atsudo径 _{(k ρ f, k θ f} )
If it is desired to view the side image to which the image belongs, the process 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 ,
To view the side image to which _k θ _f ) belongs, operate the “ear” key. Arithmetic / control circuit 21 receives the command X _k
Steps S-7 and S-8 are executed for the radials belonging to the I-th and IV-quadrants on the -Y _k coordinate plane, and the ear-side lens edge side image 417a, the rim bean vertex locus 417b, and the rim side image 417c are imaged. Display.

Step S-11 (lens frame position change):
The arithmetic / control circuit 21 instructs the image creation circuit 42 to display a question message “Do you want to change the lens frame position?” On the message display section 423 of the display 41.

When the operator determines that no change is required, he operates the next stroke key 412.

The operation / control circuit 21 is provided with a next stroke key 412
Rim surface / bevel vertex memory 24
The bevel position information (ZE _n , _k θ _n ) of the rim of the lens frame 501 stored in the lens frame 501 is stored between the motor for moving the carriage of the lens processing unit (not shown) and the motor 37 for rotating the lens axis during the grinding of the lens L. Lens bevel vertex position information (ZK _n , _k θ _n ) as control data is input to and stored in the lens bevel vertex memory 25.

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

Step S-12 (entire 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 moves the entire lens frame with respect to the lens L in the Zk axis direction. Or moving a part of the lens frame, that is, a minimum edge radial position, a maximum edge radial position or an intermediate edge radial position, on the premise that the curve of the lens frame 501 is changed.
To select “move all”, the input / output keyboard 40
By operating the entire shift key 401, the process proceeds to the next step S-13. When "partial movement" is selected, by operating the partial shift key 411, the process proceeds to the next step S-15.

[0131]Step S-13 (shift amount input):
Operate the "+" key 408 or "-" key 409 to
As shown in FIG._kEnter the axial movement amount α
Power.

Step S-14 (rim surface / bevel vertex position)
Arithmetic operation): The arithmetic / control circuit 21 calculates the rim front surface position information (ZF _n , _k θ _n ) and the bevel vertex position information (Z) of the lens frame 501 stored in the rim surface / bevel vertex memory 24.
In E _{n, k} θ _n) and reads the rim rear position information _{(ZB n, k θ n)} , the movement amount α that was entered in the previous step S-13

[0133]

(Equation 9) Is calculated, and this is added to new rim front 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 stored in the rim surface / bevel vertex memory 24, and the process returns to the next step S-5. Will be returned.

In the next step S-5, the new rim front position information (ZF _n ′, _k θ _n ), the bevel apex position information (ZE _n ′, _k θ _n ) and the rim rear position information (ZB _n ′,
_{Using k} θ _n ), cross-sectional image information is created by the same operation as described above, and the subsequent steps S-6 to S-8 are executed, and the maximum edge cross-sectional image 43 as shown in FIG.
1. A minimum edge cross-sectional image 432, an intermediate edge cross-sectional image (not shown), a lens edge side image 417a, a rim bevel vertex locus 417b, and a rim side image 417c are displayed as images.

From the new rim front surface position ZF _n ′ and the front lens refraction surface position F _n , the deviation amount Z = η ₁ ′ (maximum edge radial position), Z = η ₂ ′ = η ₂ −α ( The minimum edge radius position is obtained and displayed.

Thereafter, the above-described steps S-9 to S-
11 is executed in the same manner, and the operator
In step 1, the lens L is satisfied with the relative positional relationship between the lens L and the lens frame 501 after the “entire movement”, and the lens L is ground by using the bevel apex position information (ZE _n ′, _k θ _n ) after the “entire movement”. If it is determined that it is OK, 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 operation / 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. With the lens bevel vertex position information (Z
K _n , _k θ _n ) is input to the lens bevel vertex memory 25 and stored.

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

In the example shown in FIG. 14, the "MIN" key 403 is operated because the user wants to partially move the minimum edge radial position.

[0140]Step S-16 (shift amount input):
Operate "+" key 408 or "-" key 409
For example, as shown in FIG._kAxial travel
Enter λ.

Step S-17 (rim surface / bevel vertex position)
Location calculation): arithmetic / control circuit 21, the minimum edge radius in the example of the rim of FIG. 14 of the lens frame 501 stored in the rim surface / bevel apex memory 24 (this _{(k ρ m, k θ m} )
Bevel vertex position ZE _m corresponding to
ZE _m in the moving amount lambda entered in the previous step S-16 'a _{= ZE m + λ ··· (13} ) computes, this new bevel apex position ZE _m' and.

The operation / control circuit 21 then determines the reference radial (Y
This is ( _k ρ _s , _k θ _s ) which is the radius on the _k axis.)
Bevel apex position ZE of the rim of the lens frame 501 corresponding to.
By using _s and the same calculation as the above formulas (3) and (4)

[0143]

[Formula 10] A new bevel curve CL is obtained.

The operation / control circuit 21 further uses the radius R of the bevel trajectory surface to calculate all measured radials ( _k ρ _n , _k θ _n ).
A new bevel vertex position ZE _{n ″} corresponding to

[0145]

[Equation 11] 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).

[0146]

(Equation 12) From these new bevel vertex position information (ZE _n ′
′, _K θ _n ) and rim front position information (ZF _{n ″} ,
_k theta _n) and rim rear face position information _{(ZB n'', k θ n} ) was stored in rim surface / bevel apex memory 24, is fed back again to the next step S-5.

In the next step S-5, the new rim front position information (ZF _{n ″} , _k θ _n ), the bevel apex position information (ZE _{n ″} , _k θ _n ) and the rim rear surface position information (ZB _n)
″, _K θ _n ) to create cross-sectional image information by the same operation as described above, and to proceed to steps S-6 to S-8.
Is executed, the maximum edge section image 431, the minimum edge section image 432, the intermediate edge section image (not shown), the lens edge side image 417a, the rim bevel vertex trajectory 417b, and the rim side image 417c are displayed as shown in FIG. Is done.

In addition, from the new rim front surface position ZF _{n ″} and the lens front side refraction surface position F _n , the deviation amount Z = η _{1 ″} between the two.
(Maximum edge radial position) and Z = η _{1 ″} = η ₂ −λ (minimum edge radial position) are obtained and displayed.

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

Thereafter, steps S-9 to S-
11 is executed in the same manner, and the operator
Satisfied with the relative positional relationship between the "partial shift" after the lens L and the lens frame 501 at 1, the lens L by grinding with bevel apex position information after the "partial transfer" _{(ZE n'', k θ n} ) If it is determined that it is OK, 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 position information (ZE _{n ″} , _k θ _n ) of the lens frame rim stored in the rim surface / bevel vertex memory 24 into lens bevel vertex position information (ZK _n). , _K θ _n ) in the lens bevel vertex memory 25 and stored.

The lens edge side image 417 described above.
a, Rim bean vertex locus 417b and rim side image 4
By using the side display image 417 including the image 17c, the operator determines in advance which radial position the lens L protrudes forward and backward from the lens frame rim when the lens L after the grinding processing is inserted into the lens frame 501. It can be predicted, and the side display image 417 and the cross-sectional display images 431, 432,
Utilizing 433, lens bevel apex position information for grinding the lens L can be automatically determined and corrected.

Step S-18 (processing): When the operator operates a processing command key ( not shown ) , the arithmetic / control circuit 21 causes the lens bevel apex position information (ZK _n , _k θ _n) stored in the lens bevel apex memory 25. ) Is ground on the lens L.

The grinding operation is described in Japanese Patent Application No.
Since the operation is the same as that disclosed in Japanese Patent Application No. 0-115079 and is described in detail in this application, the description is omitted here.

The operation described above is performed in the program memory 2
6 is stored in advance and executed.

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

In the above-described embodiment, “upper side”, “ear side”,
Although the side image of either the “lower side” or the “nose side” is selectively displayed, in the present embodiment, the entire shape of the image of the expected shape of the lens L after grinding is viewed from the front of the lens. This is a developed image display in which images obtained by developing both the entire shape of the edge of the lens and the entire shape of the rim of the lens frame around the periphery are combined and displayed.

The figure shown by a two-dot chain line in FIG. 17 is the measured radial information ( _k ρ _n , _k
θ _n ) is the expected shape of the lens L after grinding.

The arithmetic / control circuit 21 reads out the bevel vertex position information (ZE _n , _k θ _n ) of the lens frame rim from the rim surface / bevel vertex memory 24 and corresponds to the reference radius vector ( _k ρ _d , _k θ _d ). Reference bevel apex position ZEd _and other measured radials ( _k ρ
_q , _k θ _q ) and the difference π _q from the bevel vertex position ZE _d (here, q = 1, 2, 3,..., d−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 vertex position ZE _d is positioned on the expected shape line indicated by the two-dot chain line, and this difference π _q is calculated for each corresponding radial angle _k θ _q. It was added to the vertex position ZE _d, an image displayed on the display 41 as determined Figure 18 the deployment bevel apex path 811.

The arithmetic / control circuit 21 then puts the developed rim front image 812 inside the developed bevel apex locus 811 in parallel with the developed bevel apex locus 811 and at an interval of a half ε / 2 of the rim thickness ε. The developed rim rear surface image 813 is displayed on the display 41 outside the developed bevel apex locus 811.

The arithmetic / control circuit 21 further stores the lens front side refraction surface position information (F _n , _k θ _n ) stored in the lens data memory 22 and the bevel vertex position information (ZE _n , _k θ) of the lens frame rim. _n ), and the difference τ _n between the lens rear side refracting surface position information (B _n , _k θ _n ) and the bevel apex position information (ZE _n , _k θ _n ) of the rim of the lens frame is represented by each radial angle. _k theta every _{n μ n = F n -ZE n} ··· (19) τ n = B n -ZE n ··· (20) ( where both n = 1,2,3, ··· n This difference μ _n is added to the developed bevel vertex locus 811 for each corresponding radial angle _k θ _n , and the developed lens front refraction surface image 80 is added.
1 is obtained and displayed on the display 41 as shown in FIG. Similarly, the difference τ _n is added to the developed bevel vertex trajectory 811 for each corresponding radial angle _k θ _n , and the developed lens rear refractive surface image 8 is added.
02 is calculated and displayed on the display 41 as shown in FIG.

[0162] These developed lens front refraction surface images 801,
The developed display image 800 is composed of the developed lens rear side refraction surface image 802, the developed bevel vertex trajectory 811, the developed rim front image 812, and the developed rim rear image 813.

Further, the index indices 419 to 42 described in step S-8 are added to the developed display image 800.
1 is synthesized and displayed.

According to the expanded display image 800 described above,
The operator can predict in advance how much the radial position of the lens L protrudes forward and backward from the lens frame rim when the lens L after the grinding process is inserted into the lens frame 501, and is developed. Display image 800 and cross-section display image 43
The lens bevel vertex position information for grinding the lens L can be automatically determined and corrected by using 1, 432, and 433.

In the above-described embodiments, 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. May be electrically connected to the ball mill in an independent configuration.

Further, instead of the lens frame shape measuring device, a storage medium storing the lens frame shape in advance, such as a floppy disk or IC card reader, may be used.
An online system with a lens frame maker or its agent may be used.

[0167]

As described above, the present invention relates to a lens frame shape measuring apparatus for measuring the shape of a lens frame by bringing a bevel filler into contact with a bevel groove of a lens frame of an eyeglass frame. Since the rim has a pair of holding rods that sandwich the rim from the thickness direction thereof, the rim can be held without deforming or damaging the lens frame,
The accurate shape of the lens frame can be measured.

[Brief description of the drawings]

FIG. 1 is a perspective view of a mechanical configuration of a lens frame shape measuring apparatus according to the present invention and a block diagram of a circuit configuration thereof.

FIG. 2A is a perspective view showing a frame holding device, and FIGS. 2B and 2C are longitudinal-median cross-sectional views for explaining the holding action of the frame holding device for holding an eyeglass frame.

FIG. 3A is a schematic diagram showing a relationship between a support device and a measurement unit, and FIG. 3B is a cross-sectional view thereof.

FIG. 4 is a partially cutaway side view showing a sensor head unit.

FIG. 5 is a schematic view showing a relationship for obtaining a geometric center from a measured value of a lens frame.

FIGS. 6A and 6B are schematic diagrams for explaining how to obtain a rim bevel curve of a lens frame.

FIGS. 7A and 7B are cross-sectional views of a hand of a frame holding device and a support device for explaining the operation of a lens frame shape measuring device for obtaining a rim thickness of a lens frame.

FIG. 8 is a block diagram showing a configuration of a lens shape measuring device and a bevel position display device of the ball mill according to the present invention.

FIG. 9 is a flowchart for explaining the operation of the lens shape measuring device and the bevel position display device.

FIG. 10 is a schematic diagram showing the relationship between the measured radius of the lens and the radius of the lens frame.

FIG. 11 is a schematic diagram showing a relationship between a bevel apex position of a rim of a lens frame and a rim front position obtained from the rim front position.

FIG. 12 is a schematic diagram for explaining the principle of measuring the position of the front refracting surface of the lens and the position of the rear refracting surface of the lens.

FIG. 13A is a schematic diagram for explaining each component of a side display image and a cross-section display image and their mutual relationship,
(B) is a schematic diagram for explaining the relationship between the side surface display image, the cross-section display image, and the measured radius in (A).

FIG. 14 is a schematic diagram illustrating another example of a side display image and a cross-section display image.

FIG. 15 is a schematic diagram showing changes in the side display image and the cross-sectional display image of FIG. 14 when the entire lens frame moves.

FIG. 16 is a schematic diagram showing changes in the side display image and the cross-section display image of FIG. 14 when the lens frame is partially moved.

FIG. 17 is a schematic diagram for explaining a developed bevel vertex trajectory;

FIG. 18 is a schematic diagram illustrating an example of a developed display image.

FIG. 19 is a plan view showing another embodiment of the lens frame shape measuring device.

FIG. 20 is a sectional view taken along line IIX-IIX ′ of FIG. 19;

FIG. 21 is a plan view showing still another embodiment of the lens frame shape measuring device.

22 is a sectional view taken along the line IIXII-IIXII ′ of FIG. 21.

[Explanation of symbols]

 1 ... Lens frame shape measuring device 152 ... Frame holding rod 356 ... Bevel filler 500 ... Eyeglass frame 501 ... Lens frame

Claims (1)

[Claims] 1. A lens frame shape measuring device for measuring the shape of a lens frame by bringing a bevel filler into contact with a bevel groove of a lens frame of an eyeglass frame, comprising: A lens frame shape measuring device comprising: a holding rod.