JPH0792378B2 - Frame shape measuring device and ball-slicing machine having the same - Google Patents

Description

The present invention relates to a frame shape measuring device capable of automatically measuring the rim thickness of a lens frame of an eyeglass frame, and a ball-slicing machine having the frame shape measuring device.

(Prior Art) A frame shape measuring device that mechanically-electrically and automatically measures, as digital data, the two-dimensional shape of a lens frame of an eyeglass frame in which a lens to be processed is framed, that is, the frame shape measurement A ball-slicing machine that automatically grinds a lens to be processed based on the lens frame radius information measured by the device is the same as the Japanese patent application filed by the applicant earlier.
It is disclosed in detail in No. 60-115079. In addition, a frame shape measuring device that mechanically-electrically and automatically measures the three-dimensional shape of the bevel apex locus of the rim of the lens frame as digital data is disclosed in Japanese Patent Application No.
-123593 in detail.

The ball-sliding machine disclosed in Japanese Patent Application No. 60-115079 further measures the edge thickness of the lens to be processed based on the lens frame radius information measured by the frame shape measuring device, and uses the edge thickness measurement data. Based on this, the expected bevel apex position that will be processed and formed on the lens to be processed is automatically calculated, its cross-sectional shape can be displayed as a surface image, and the position can be corrected manually if necessary. Furthermore, so that the bevel is formed at the bevel vertex position that is automatically calculated or modified,
The lens to be processed was automatically ground.

(Problems to be Solved by the Invention) However, in any of the above-mentioned conventional techniques, the three-dimensional shape of the bevel apex locus of the rim of the lens frame or the bevel apex position formed by grinding on the lens to be processed is used to grind the lens. Although it can be known before the processing, the thickness of the rim of the lens frame of the spectacle frame in which the lens to be processed is placed is visually estimated to determine the bevel apex position to be processed.

Therefore, when putting the processed lens in the lens frame, the lens edge largely protrudes from the rim front surface, and conversely, the rim front surface protrudes too much from the front refraction surface of the lens, resulting in a bevel apex positioning error. There was an occasion.

The main cause of such mistakes is that the rim thickness of the lens frame is not measured, but it is complicated to measure the rim thickness for each lens frame, and a frame shape measuring device or a frame shape measuring device that can automatically measure the rim thickness is used. It was desired to have a ball mill.

A first object of the present invention is to provide a frame shape measuring device capable of measuring the rim thickness of a lens frame.

A second object of the present invention is to provide a ball mill having a frame shape measuring device capable of measuring the rim thickness of the lens frame.

(Means for Solving the Problems) In order to achieve the first object, the invention of claim 1 is a frame shape measuring device for measuring the shape of a lens frame of an eyeglass frame, wherein a rim of the lens frame is provided. At least two abutting members that come into contact with the front surface and the rear surface, and detection means that detects the amount of movement of at least one of the abutting members;
And a calculating unit for obtaining the thickness of the rim from the detection result of the detecting unit.

Also. According to a second aspect of the present invention, in a frame shape measuring device for measuring the shape of a lens frame of a spectacle frame, the rim is held at least at two positions, the abutting member contacting a rim front surface and a rear surface of the lens frame. At least two sets of lens frame holding means, detection means for detecting the relative movement amount of at least one set of the contact members of the lens frame holding means, and the thickness of the rim is obtained from the detection result of the detection means. And a calculation means.

According to a third aspect of the present invention, in a frame shape measuring device for measuring the shape of a lens frame of an eyeglass frame, the holding means for holding the front and rear surfaces of the rim of the lens frame is provided with proximity-separation from each other. A frame holding means having two base members each having abutting sides at both ends,
Supporting means for supporting the frame holding means, and two hand members having two hand members formed with two inclined surfaces facing each other that can come into contact with the contact sides of the respective base members, and the relative relation between the two hand members. It is characterized by having a measuring means for measuring the moving amount and a calculating means for calculating the thickness of the rim from the measurement result of the measuring means.

Further, in the invention of claim 4, in the claim 3, the two slopes of each of the hand members are inclined symmetrically with respect to a reference plane in mutually opposite angles, and the hand is The member is characterized in that when the frame holding means is supported, a predetermined point of the bevel apex locus of the rim matches the reference plane.

Further, the invention of claim 5 is characterized in that, in any one of claims 1 to 4, there is provided a display means for displaying the rim thickness obtained by the computing means.

In order to achieve the second object, the invention of claim 6 has a frame shape measuring device according to any one of claims 1 to 5.

(Example) Hereinafter, the Example of the ball-shaving machine which concerns on this invention is described.

The ball cutter is a lens frame shape measuring device 1, a lens shape measuring device
3. It comprises a bevel position display device 4 and a lens processing section. Incidentally, the lens processing section has the same construction and operation as in the above-mentioned Japanese Patent Application No. 60-115079, and since it is not directly related to the present invention, its explanation is omitted.

A. Lens Frame Shape Measuring Device First, the first embodiment of the lens frame shape measuring device 1 of the present invention will be described.
A description will be given with reference to FIGS.

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

This device is roughly divided into three parts, namely, a frame holding device part 100 for holding a frame, and a frame holding device part 100 that supports the frame holding device part 100 and transfers the holding device part into a measurement surface and within the measurement surface. Support device section 20 that controls the movement of
0, and a measuring unit 300 that digitally measures the shape of the lens frame of the spectacle frame.

The support device section 200 has a movable stage 203 that is movable in parallel in the vertical direction (X-axis 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 which is a pulse motor. As a result, the moving stage 203 is moved in the X-axis direction.

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

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

The hand 211 has two slopes 215 and 216 that intersect with each other as shown in FIG. 3B, and the hand 212 also has two slopes 217 and 218 that also intersect with each other. The ridge line 220 formed by both slopes 217, 218 of the hand 212 is parallel to the ridge line 219 formed by the slopes 215, 216 of the hand 211 and located in the same plane S, and the angle formed by the slopes 217, 218 and the angle formed by the slopes 215, 216 are the same. Configured to be equal. And
A spring 203 is stretched 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 224 having a pulley 223 at the other end.
Is attached. A mini-chia belt 226 is stretched around the pulleys 223 and 224, and both ends of the mini-chia belt 226 are fixed to pins planted on the upper surface of the hand 211.

On the bottom surface of the hand 211, a rim thickness detection head 231 is attached to the hand 212.
One end of the Magnescale 232 is fixed to the underside of the scale, and the change in the distance between the hand 211 and the hand 212 is measured by the scale 232.
And the detection head 231 can be used for measurement.

The detection head 231 and the magnet scale 232 constitute a rim thickness detection device section 233. The output signal output from the detection head 231, that is, the detection result is the counter 606.
Is input to the arithmetic circuit 613 via.

The measuring unit 300 includes a sensor arm rotation motor 301 attached to the lower surface of a casing (not shown) and a sensor arm unit 302 rotatably supported on the upper face of the casing. Motor 301
A belt 305 is stretched between a pulley 303 attached to the rotary shaft of the sensor arm unit 302 and a rotary shaft 304 of the sensor arm unit.
Be transmitted to.

The sensor arm 302 is passed over the base 310 2
It has rails 311 and 311 of a book, and the sensor head portion 312 is slidably mounted on the rails 311 and 311. A time scale reading head 313 is attached to one side of the sensor head portion 312, whereby a rail is attached to the base 310.
The magnetic scale 314 attached in parallel with 311 is read to detect the amount of movement of the sensor head portion 312. Further, on the other side of the sensor head portion 312, one end of a mainspring (not shown) of a spring device 315 that constantly pulls the head portion 312 toward the arm end side surface is fixed.

FIG. 4 shows the structure of the sensor head portion 312, and the rail 311
A shaft hole 351 is formed in the slider 350 supported in the vertical direction, and a sensor shaft 352 is inserted into the shaft hole 351. The sensor shaft is located between the sensor shaft 352 and the shaft hole 351.
A ball bearing 353 held by 352 is interposed, 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 attached to the center of the sensor shaft 352,
On the upper part of the arm 355, a bevel filler 356 in the shape of an abacus ball which is brought 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 shaft 352.

Below the slider 350, a read head 359 of a sensor 358, which is, for example, a magnescale, for measuring the amount of movement of the sensor shaft in the vertical direction, that is, the amount of movement in the Z axis.
Is attached. 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 device section 100 will be described with reference to FIG.

Both side flanges 151 having sides 151a, 151a of the fixed base 150,
Frame holding rods 152, 152 are screwed to the center of 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 formed by two leaf springs 154, 154 attached to the bottom plate 150a of the fixed base 150. It is supported.

Two parallel guide grooves 155, 155 are formed on 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 to move the sliders 156, 156. It is slidably mounted on 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 in the inner periphery of the circular opening 157. Two pins 159 (the other side not shown) are planted on the upper surface of the ring 158, and each of the pins 159 (the other side not shown) is a slot 156c formed in the stepped portion 156b, 156b of the slider 156, 156. (Other not shown).

In addition, a vertical cutout 156 is formed in the center of the sliders 156,156.
d and 156d are formed, and the frame holding rods 152 and 152 described above can be inserted into the cutout portions 156d and 156d, respectively. In addition, holes 156e, 156e are formed on the upper surfaces of the sliders 156, 156 so that the operator can easily insert his / her finger when operating the sliders.

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

First, as shown in FIG. 2 (A), sliders 156, 156
The fingers are inserted into the hole portions 156e, 156e of the movable bases 156e, 156e so that the sliders 156, 156 are sufficiently spaced apart from each other and pressed downward.
At the same time, the two holding bars 152 and the stepped portions 156b, 156b of the sliders 156, 156 are sufficiently spaced from each other against the elastic force of the leaf springs 154, 154.

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

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

Further, at this time, the distance d from the apex 501a of the bevel groove of the lens frame 501 to the side 151a of the flange 151 of the fixed base 150 and the distance d to the side 153a of the movable base 153 are configured to have the same value.

Next, after inserting the frame holding device section 100 holding the frame 500 in this way between the hands 211 and 212 of the supporting device 200 set at predetermined intervals, the Y-axis motor 224 is rotated by a predetermined angle. The mini-chia belt 226 is driven by the rotation of the Y-axis motor 224, the hand 211 is moved leftward by a certain amount, and the frame holding device section 100 and the hand 212 are also induced to move leftward.

At the same time, the frame holding device section 100 is held by the two hands 211 and 212 by the tension spring 230. At this time, the side 151a of the flange 151 of the fixed base 150 of the frame holding device section 100,
151a is slope 215 of hand 211 and slope 2 of hand 212, respectively
The movable base 153 is in contact with both sides 153a, 153a of the hand 211 and the slope 218 of the hand 212, respectively.

In the present embodiment, as described above, the distances d from the bevel groove 501a of the eyeglass frame 501 to the sides 151a and 153a are equal to each other, so that the frame holding device 100 uses the hands 211,2.
When pinched by 12, the bevel groove apex 501a of the lens frame 501 is automatically positioned on the reference plane S formed by the ridgelines 219 and 220 of both hands.

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

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

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

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

Here, in the first measurement, as described above and shown in FIG. 3 (A), the center O of the rotating shaft 304 is set to the lens frame 501.
It was measured by roughly matching with the geometric center of.

The second measurement is the first measurement data (ρ _n , θ _n ).
Measured point B (X _b , Y _b ) having the maximum value in the X-axis direction, and measured point D having the minimum value in the X-axis direction from the data (X _n , Y _n ) after the polar coordinate-orthogonal coordinate conversion. (X _d , Y _d ), the measured point A (D _a , Y _a ) having the maximum value in the Y-axis direction and the measured point C (X _c , Y _c ) having the minimum value in the Y-axis direction are selected, O _{0 in} the geometry of the lens frame, Then, based on these X ₀ and Y ₀ values, the X-axis motor
206 and the Y-axis motor 224 are driven to move the frame holding device section 100 sandwiched by the hands 211 and 212, whereby the geometric center O ₀ of the lens frame 501 coincides with the rotation center O of the sensor arm 302, and the lens again. The frame shape is measured, and the measured values at the geometric center O ₀ ( ₀ ρ _n , ₀ θ _n ) (n = 1,2,3 ,.
・ ・ N) is required.

At the time of measuring the lens frame shape based on the geometric center O ₀ described above, the sensor 358 simultaneously measures the amount of movement of the sensor head 312 in the Z-axis direction. As a result, three-dimensional information of ( ₀ ρ _n , ₀ θ _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 sandwich the frame holding device section 100, the rim thickness detection head 231 detects the movement amount (measurement interval) h of the magnet scale 232 and inputs it to the arithmetic circuit 613. .

Hand the frame holding device 100 with the eyeglass frame 500 not set in the frame holding device 100.
The reference distance H of the hands 211,212 when sandwiched by 1,212 is
As shown in FIG. 7 (A), it is already known in design and stored in the reference value memory 607.

Now, the angle between the reference plane S and the slopes 215 to 218 of the hands 211 and 212 is Γ, In this example, since Γ = 45 ° is designed,
The rim thickness ε is finally calculated by the arithmetic circuit 613 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 / control circuit of the frame shape measuring apparatus of the present application.

The driver circuits 601 to 604 are respectively used for the X-axis motor 20.
6, Y-axis motor 224, sensor arm rotation axis motor 301,
And a guide shaft rotation motor 209. Driver 601
Reference numerals 604 to 604 control the rotation drive of each pulse motor according to the number of pulses supplied from the pulse generator 609 under the control of the sequence control circuit 610.

The read output of the read head 313 is counted by the counter 605, 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 taken as a set (ρ _n , θ _n ) into the data memory 611,
Remember this.

Next, the arithmetic circuit 613 side calculates the geometric center O ₀ of the lens frame 501 based on the first radial information (ρ _n , θ _n ) stored in the data memory 611, and stores the data. Input to the sequence control circuit 610. Sequence control circuit 610
Is based on the data from the arithmetic circuit 613.
X ₀ and Y ₀ are calculated from the equations, and the required number of pulses are input to the Rhodivers 601 and 603 to drive the motors 206 and 224 so that the center of the lens frame 500 coincides with the center of rotation of the sensor arm 302.

At the same time, the sequence control circuit 610 changes the counter circuit 6
Command 15 to command to count the data from the Z-axis sensor 358. Then, the lens frame shape information ( ₀ ρ _n , ₀ θ _n , Z _n ) including the Z-axis direction data is measured again, and this data is stored in the data memory 611.

Lens frame shape information ( ₀ ρ stored in the data memory 611)
_n , ₀ θ _n , Z _n ) based on the Z _n information, the curve value c of the lens frame
Can be calculated by the arithmetic circuit 613 as necessary.

As shown in FIGS. 6 (A) and 6 (B), the calculation is performed by using the radial vectors ρ _A and ρ _B at least at two points a and b on the lens frame,
From these two sensor heads Z _A and Z _{B in} the Z-axis direction, the radius of curvature R of the sphere SP including the bevel locus of the lens frame 501 is calculated. The curve value CF of the lens frame bevel is calculated from
From (However, n is a constant and n = 1.523), and the calculated value is stored in the data memory 612.

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

It should be noted that the sequence control circuit executes the above-mentioned measurement steps by a program stored in the program memory 614.

FIG. 19 and FIG. 20 show another embodiment of the lens frame shape measuring apparatus. Since the measuring section 300 and the arithmetic / control circuit have the same configurations as those of the above-mentioned embodiments, the description thereof will be omitted.

Movable support rails 1001 and 1002 are movably supported on guide rails 1007, and feed screws 1004 and 100 having feed directions opposite to each other.
The lead screw members 1003 are formed and are driven to rotate by the motor 1006, and are moved toward and away from each other.

In the movable support rail 1001, pedestals 1032 and 1033 are stored movably up and down along a guide rail (not shown), and the pedestals 1032 and 1033 have feed screws 103 whose feed directions are opposite to each other.
5, 1036 are formed and are moved toward and away from each other by the feed screw member 1034 which is rotationally driven by the motor 1037. A pedestal 1031 that is vertically movable along a guide rail (not shown) is attached to the pedestal 1032 via a pressing spring 1038.

Two holding rods 1011 and 1012 are fixed to the pedestal 1031 and inserted into a pair of slots 1024 (the other is not shown) formed in the movable support rail 1001 so as to project outside the movable support rail 1001. Two holding rods 1021 (the other one is not shown) are fixed to the pedestal 1033, inserted into a pair of slots 1024 (the other one is not shown), and protruded out of the support rail 1001.

In the movable support rail 1002, pedestals 1042 and 1043 are housed so as to be vertically movable along a guide rail (not shown), and the pedestals 1042 and 1043 have feed screws 104 whose feed directions are opposite to each other.
5, 1046 are formed and are moved toward and away from each other by a feed screw member 1044 which is rotationally driven by a motor 1047. A pedestal 1041 that is vertically movable along a guide rail (not shown) is attached to the pedestal 1042 via a pressing spring 1048.

A single holding rod 1013 is fixed to the pedestal 1041 and is inserted into a slot 1026 formed in the movable support rail 1002 so as to project to the outside of the movable support rail 1002. One pedestal 1023 is fixed to the pedestal 1043, inserted into the slot 1026, and projected outside the movable support rail 1002. Further, a contact 1049 is attached to the pedestal 1041, a detector 1050 including, for example, a potentiometer is attached to the pedestal 1043, the contact 1049 is in contact with the detector 1050, and the holding rod 1013 and the holding rod 1023 are vertically arranged. The relative movement amount in the direction is detected. Contact 1049
And the detector 1050 constitutes the rim thickness detection device section 233.

Next, the operation of this embodiment will be described.

The lens frame 501 of the eyeglass frame 500 is placed on a pair of holding rods 1021 (the other one is not shown) of the movable support rail 1001 and a holding rod 1023 of the movable support rail 1002, and a motor 1006 is driven to move the movable support rails. The lenses 1001 and 1002 are brought close to each other, and the top and bottom of the rim of the lens frame 501 are brought into contact with the inner surfaces of the support rails 1001 and 1002. Next, the motors 1037, 1047 are driven to lower the holding rods 1011, 1012, 1013, and the corresponding holding rods are moved.
Holds the rim in cooperation with 1021, (not shown), 1023. At this time, the distance between the holding rod 1013 and the holding rod 1023 is the detector.
The 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, in which 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 thereof will be omitted.

Inside the movable support rail 1001, there is a feed screw 1103 rotated by the operation of the feed handle 1104, and the stopper 1105 can be moved along the longitudinal direction of the movable support rail 1001 by the rotation thereof. The tip of the stopper 1105 projects through a slot (not shown) to the outside of the movable support rail 1001. Also, the inner surface 10 of the movable support rail 1001
A support protrusion side 1111 is formed on 01a.

Inside the movable support rail 1002, there is a feed screw 1106 which is rotated by operating a feed handle 1107. As the feed screw 1106, feed screws (not shown) whose feed directions are opposite to each other are formed. Stoppers 1108 and 1109 for each lead screw
The stoppers 1108 and 1109 are configured to be movable toward and away from each other along the longitudinal direction of the movable support rail 1002 by screwing together and rotating the feed handle 1017. The tip ends of the stoppers 1108 and 1109 project through a slot (not shown) in the movable support rail 1002 and project. Also, the inner surface 1002 of the movable support rail 1002
A support protrusion side 1112 is formed on a.

Further, inside the movable support rail 1002, the tip of the movable piece 1121 having the inclined surface 1121a is housed so as to protrude from the vertical slit 1125. Slot formed on the movable piece 1121
1123 is inserted in the regulation bar, and the movable piece 1121 is allowed to move only in the vertical direction within a predetermined range. A spring 1124 is attached to the lower end of the movable piece 1121 and always pulls the movable piece 1121 downward. A contact 1149 is attached to the movable piece 1121, and the contact 1149 is a detector which is attached to the inner surface of the movable support rail 1002 and which is, for example, a potentiometer.
Since the movable piece 1121 is in contact with 1050, the amount of vertical movement of the movable piece 1121 is detected.

Next, the operation of this embodiment will be described.

The lens frame 501 of the spectacle frame 500 is movably supported so that the rim front surface abuts the supporting protruding sides 1111 and 1112, and the rim upper and lower surfaces are sandwiched by the inner side surfaces 1001a and 1002a of the movable support rails 1001 and 1002. The motors 1006 drive the rails 1001 and 1002 to approach each other. Stoppers 1105, 1108, 1109 are
It is used to define the lateral position of the lens frame 501 and holds the rim laterally.

As the movable piece 1121 holds the lens frame 501, the spring 1
It is moved upward against the tensile force of 124, 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 3 in FIG. 8 shows a lens shape measuring device. Since this device has the same structure as the above-mentioned Japanese Patent Application No. 60-115079, refer to the application for details of the structure and operation.

The lens shape measuring device 3 has a stage 31 that is moved back and forth by driving a pulse motor 36.
There are provided feelers 32, 34 capable of holding the lens L to be measured, and the feelers 32, 34 are urged by springs 38, 38 in directions toward each other so as to hold the lens L at all times.

On the other hand, the lens rotation shafts 4, 4 incorporated in a carriage (not shown) are configured to be rotatable by a pulse motor 37. The lens rotation shafts 4, 4 have a lens L, an optical axis O thereof, and a lens rotation shaft 4, 4. It is held so as to match the axis of rotation of 4. As a result, the lens L is rotated by the pulse motor 37.

Lens measurement radius information ( _k ρ _n , from measurement radius memory 23)
_k θ _n ) (here, n = 1, 2, 3, ... N), the angle information _k θ _n is input to the arithmetic / control circuit 21, and the arithmetic / control circuit 21 is based on the information. The pulse of the pulse generator 27 is supplied to the driver circuit 37A, and the pulse motor 37 is rotated by an angle _k θ _n from the reference position. 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 supplies the pulse of the pulse generator 27 to the driver circuit 36A based on the information to drive the pulse motor 36. Then, the tip ends of the feelers 32, 34 are moved back and forth via the stage 31 so as to be positioned at a position related to the radius vector length _k ρ _n from the optical axis O of the lens L (rotation axis of the lens rotation axes 4, 4). It is configured.

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

Then, at this position, the movement amount F _n of the feeler 32 (where,
(n = 1, 2, 3, ... N) is detected by the encoder 33, and this is stored in the lens data memory 22 via the calculation / control circuit 21 as lens front side refracting surface position information.

Similarly, the amount of movement F _n of the feeler 34 at this position (where n = 1, 2, 3, ... N) is detected by the encoder 35, and this is calculated as the lens rear side refracting surface position information / Control circuit 21
The data is stored in the lens data memory 22 via.

C. Bevel Position Display Device The bevel position display device 4 includes a calculation / control circuit 21, an input / output keyboard 40 connected to this, a lens data memory 2
2, measurement radius memory 23, rim surface / bevel vertex memory 24,
It comprises a lens bevel vertex memory 25, an image forming circuit 42, a symbol image memory 43 connected to it, and a program memory 26.

The input / output keyboard 40 displays images such as bevel position,
Further, it has a display unit 41 such as a liquid crystal display unit or a CRT for numerically displaying input / output data and various input keys 401 to 413 described later.

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 upper alignment amount): The operator operates the FPD key 405 of the input / output keyboard 40,
The “FPD” display unit 414 of the display 41 displays the lens frame geometric intermediate distance of the spectacle frame, that is, the reference value of the frame PD, which is prestored in an internal storage circuit (not shown) inside the arithmetic / control circuit 21.

If the frame PD value of the spectacle frame 500 to be framed this time is different from this reference frame PD value, the operator operates the “+” key 408 or the “−” key 409 of the input / output keyboard 40 to obtain the display value. Value, and then press the "Set" key
Operate 413 to store in the internal memory circuit.

The operator operates the PD key 406 of the input / output keyboard 40,
The inter-pupil distance, that is, the PD reference value, which is stored in advance in the internal storage circuit of the arithmetic / control circuit 21, is displayed on the display unit 41 as “PD”.
It is displayed on the display unit 415.

If the PD value of the wearer of the spectacle frame 500 to be framed this time is different from this reference PD value, the operator operates the "+" key 408 or the "-" key 409 to obtain the desired display value. Then, the "set" key 413 is operated to store in the internal memory circuit.

Next, the operator uses the “up” key 40 of the input / output keyboard 40.
After operating 7, the "+" key 408 is operated to display the desired top-up amount UP on the "top-up" display section 416, and the "set" key 413 is operated to store it in the internal storage circuit.

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

Next, the arithmetic / control circuit 21 measures the lens frame shape information ( ₀ ρ) with the geometric center O of the lens frame 501 of the spectacle frame 500 measured by the frame shape measuring device 1 and stored in the data memory 611 as the origin. _n , ₀ θ _n , ₀ Z _n ) (where n
= 1,2,3, ... N) is read. Read that i
The lens frame radius vector information ₀ P _i ( ₀ ρ _i , ₀ θ _i ) at the measurement point
As shown in Fig. ₀ , the coordinates are converted to the coordinates of the X ₀ −Y ₀ −Z ₀ coordinate system, ₀ P _i ( ₀ X _i , ₀ Y _i ) is obtained, and the measurement point ₀ P _i is the origin O from the origin O _{0 in the} X ₀ axis direction by the above-mentioned inward displacement amount IN and the Y _0- axis direction by the above-mentioned upward displacement amount origin O X _k -Y _k -Z _k of the coordinate system i-th machining point _k P _{where k} is moving
_i, and its coordinates As

Then, this is again the lens measurement radius with the origin O _k as the origin.
In P _i ( _k ρ _i , _k θ _i ) Convert coordinates. This series of coordinate conversion is performed by the arithmetic / control circuit.
In step 21, the first measurement point P ₁ to the nth measurement point P _{n are} executed, and these measurement radius information ( _k ρ _n , _k θ _n ) (where n = 1, 2,
3, ... N) are stored in the measurement radius memory 23.

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

The arithmetic / control circuit 21 reads the angle information _k θ _n out of the lens measurement radius information ( _k ρ _n , _k θ _n ) from the measurement radius memory 23, and based on this information, outputs the pulse of the pulse generator 27. The pulse motor 37 is supplied to the driver circuit 37A to rotate the pulse motor 37 from the reference position by an angle _k θ _n . At the same time, the radial length information _k
ρ _{n is} also input to the arithmetic / control circuit 21, the pulse of the pulse generator 27 is supplied to the driver circuit 36A based on the information, the pulse motor 36 is driven, and the tip ends of the feelers 32, 34 are moved back and forth via the stage 31. Move it to the optical axis O of the lens L
From (lens rotation axis 4, 4 rotation axis) to the radial length _k ρ _n −γ
It is located in the position of. Here, γ is a known amount of the depth of the V bevel grindstone in the processing portion for grinding the lens L.

Then, as shown in FIG. 12, the feeler 32 is
The moving amount F _n (here, 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 ( 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 (here, n = 1,2,3, ... N) of the feeler 34 at this position is detected by the encoder 35 and corresponds to the rotation angle _k θ _n of the lens L. Then, the calculation / control circuit 21 is used as the lens rear side refracting surface position information (B _n , _k θ _n ).
The data is stored in the lens data memory 22 via.

Step S-4 (rim surface / bevel apex calculation): The calculation / control circuit 21 sets the geometric center O ₀ of the lens frame 501 measured by the frame shape measuring device 1 and stored in the data memory 611 as the origin. Bevel position information of lens frame ₀
ρ _n , ₀ θ _n , ₀ Z _n ) (where n = 1, 2, 3, ... N)
Reading, the Z ₀ axis direction of the bevel apex position _O Z _i of the i-th measurement point ₀ P _i, i-th machining point of X _k -Y _k -Z _k coordinate system corresponding to the i-th measurement point ₀ P _i to associated as a _k P _i of Z _k axis direction of the bevel apex position ZE _i. This series of correspondences is assigned to the first processing point.
_The lens frame 501 is executed for _k P _i or the Nth processing point _k P _n .
Of the bevel apex position in the X _k −Y _k −Z _k coordinate system (Z
E _n , _k θ _n (where n = 1, 2, 3, ... N) are calculated.
Note that the Z coordinate Z ₀ and X _k −Y _k −Z _k of the origin O ₀ of the X ₀ −Y ₀ −Z ₀ coordinate system
The origin O _k of the coordinate system coincides with the Z coordinate Z _k as shown in FIG.

Next, as shown in FIG. 11, the arithmetic / control circuit 21 reads out the rim thickness ε of the lens frame 501 measured by the frame shape measuring device 1 and stored in the data memory 612, and obtains this rim thickness ε. Top bevel position information (ZE _n , _k θ _n )
And from the rim front surface position information of the lens frame 501 (ZF _n , _k θ _n )
And rim rear surface position information (ZB _n , _k θ _n ) (Here, n = 1,2,3, ... N).

These bevel position information (ZE _n , _k θ _n ), rim front surface position information (ZF _n , _k θ _n ) and rim rear surface 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 FIGS. 8 and 13A, the arithmetic / control circuit 21 causes the lens front-side refractive surface position information (F _n , _k ) stored in the lens data memory 22. θ _n ) and the lens rear side refracting surface position information (B _n , _k θ _n ) from the lens edge thickness Δ for each radius vector.
_n determined from the _{Δ n = B n -F n ·····} (11), the edge thickness information (Δ _{n, k} θ _n) the maximum edge thickness from Δmax and its radius vector angle of theta _1, the minimum edge thickness Δmin And its radial angle θ ₂ and the intermediate edge thickness Δmid and its radial angle θ ₃
Ask for.

The arithmetic / control circuit 21 has a radius vector having a maximum edge thickness Δmax,
In the example of FIG. 13B, ( _k ρ _c , _k θ _c ), the lens front refractive surface position F _c , the lens rear refractive surface position B _c, and the radius vector having the minimum edge thickness Δmin, the example of FIG. 13B Then ( _k ρ _d ,
_k θ _d ), a lens front side refracting surface position F _d , a lens rear side refracting surface position F _d, and a radius vector having an intermediate edge thickness Δmid, ( _k ρ _e , _k θ _e ), in the example of FIG. 13B. Front refractive surface position
The image forming circuit 42 is used to set F _e and the lens rear side refracting surface position B _e , respectively.
To enter.

Next, the arithmetic / control circuit 21 outputs Y _{k as} shown in FIG. 13B.
The radius vector located on the axis (hereinafter referred to as the reference radius vector) is ( _k ρ _d , _k θ _d ) in the example of FIG. 13B, and in this example, it corresponds to the radius vector having the minimum edge thickness Δmin. The lens front side refracting surface position F _d is read from the lens data memory 22.

The arithmetic / control circuit 21 uses the rim surface / bevel apex memory 24 to store the bevel position information (ZE _n , _k θ _n ) of the lens frame 50, the rim front face position information (ZF _n , _k θ _n ) and the rim rear face position information (Z
B _n , _k θ _n ) is read out and the reference radial vector ( _k ρ _d , _k θ _d ) is read.
Radius vector _(k ρ _{c, k} having the the maximum edge thickness Δmax when allowed lens front refraction surface position F _d and to coincide with the rim front position ZF _d of the lens frame 501 corresponding to the radius vector angle of _k theta _d θ _c )
Lens frame 501 having a common radial angle _k θ _c of
Bevel position ZE _c and rim front position ZF _c and rim rear position
Each ZB _c is obtained and input to the image forming circuit 42.

Similarly, the radius vector ( _k ρ _d , _k θ ₎ having the minimum edge thickness Δmin
_d ) the bevel position ZE _d , the rim front face position ZF _d , the rim rear face position ZB _d , and the lens frame 501 corresponding to the radius vector ( _k ρ _e , _k θ _e ) having the intermediate edge thickness Δmid.
Bevel position ZE _e , rim front position ZF _e, and rim rear position ZB _e
Is input to the image forming circuit 42.

The arithmetic / control circuit 21 further calculates the deviation amount Z = ZF _c −F _c = η ₁ between the rim front surface position ZF _c and the lens front side refracting surface position F _c corresponding to the maximum edge thickness radius vector, This value is displayed
41 "max" display 431a "Z" column, radial angle θ ₁ = _k θ
_c is displayed numerically in “θ”.

Similarly, the arithmetic / control circuit 21 calculates a deviation amount Z = ZF _d −F _d = η ₂ from the rim front surface position ZF _d corresponding to the minimum edge thickness radius vector and the lens front side refracting surface position F _d. , Display this value
41 "MIN" display 431b "Z" column, radial angle θ ₂ = _k θ
Numerically display _d in “θ”.

Further, similarly, the arithmetic / control circuit 21 calculates a deviation amount Z = ZF _e −F _e = η ₃ between the rim front surface position ZF _e corresponding to the intermediate edge thickness radius vector and the lens front refractive surface position F _e. Then, this value is displayed in the “Z” column of the “MID” display 431c of the display unit 41 and the radial angle θ ₃
= _K θ _e is numerically displayed in “θ”.

Step S-6 (display of cross-sectional image): The image creating circuit 42 reads the rim cross-sectional image 426 of the schematic lens frame stored in the symbol image memory 43 in advance, and outputs the maximum edge image input from the arithmetic / control circuit 21. Thickness radius (
bevel position Z of the lens frame 501 corresponding to _k ρ _c , _k θ _c ).
The bevel apex 426a of the rim sectional image 426 is located at E _c , the rim front surface 426b of the rim sectional image 426 is located at the rim front surface position ZF _c, and the rim rear surface 426c of the rim sectional image 426 is located at the rim rear surface position ZB _c.
The rim cross-section image 426 is displayed on the display unit 41 so that the image is positioned.

In addition, the image creating circuit 42 uses the maximum edge thickness radius vector ( _k ρ _c , _k
The lens front surface index line 427a is located at the lens lens front side refracting surface position F _c corresponding to θ _c ), and the lens back surface index line 427b is located at the lens back side refracting position B _c. Display next to rim cross-section image 426
The image is displayed on 41. Maximum edge thickness Δmax radius ( _k ρ _c , _k
The rim cross-sectional image 426 and the lens edge cross-sectional image 427 corresponding to θ _c ) are defined as a set as the maximum edge cross-sectional image 431.

The image creation circuit 42 similarly displays the minimum edge cross-section image 432 and the intermediate edge cross-section image 433 on the display 41.

Step S-7 (side image information creation): The arithmetic / control circuit 21 reads the radial vector information ( _k ρ _n , _k θ _n ) stored in the measured radial vector memory 23, and as shown in FIG. 13B. obtains a positive projection of X _k -Y _k -Z _k coordinate system X _k -Y _k coordinate plane the I quadrant and the X-axis of the radius vector of the radius vector length included in quadrant II of the maximum of the I quadrant Radial ( _k ρ _a , _k θ) to obtain an orthographic projection
_a ) et al. Radial ( _k ρ _b , _k θ) to obtain the maximum orthographic projection of the second quadrant
_b ) bevel position information ZE _j , rim front surface position information ZF _j and rim rear surface 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 forming circuit 42.

Further, the arithmetic / control circuit 21 determines that the lens front side refracting surface position F _j and the lens back side refracting surface position B which belong to the above range of the angle Θ.
_j (here, j = a, a + 1, a + 2, ... B-1, b) is read from the lens data memory 22 and input to the image forming circuit 42.

Step S-8 (side image display): The image creating circuit 42 is shown in FIGS. 8 and 13A from the lens front refractive surface position F _j and the lens rear refractive surface position B _j input in the previous step. As described above, a lens edge side image 417a display showing the upper edge side after the lens L is ground.
Display the image on the 41. Further, the rim bevel apex trajectory 417b on the upper side of the lens frame 501 from the bevel position ZB _j is displayed as an image, and the rim side surface image 417c on the upper side of the lens frame 501 is displayed from the rim front surface position ZE _j and the rim rear surface position ZB _j on the lens edge side image. 417a Overlay and display an image.

In addition, the bevel end surface images 417d and 417 of the lens edge surface image 417a.
The image of d is formed such that the bevel apex 417e is located at the bevel position ZB _j and the beveled foot ends 417f and 417f are located at the lens front side refracting surface position F _j and the lens back side refracting surface position B _j , respectively.

These lens edge image 417a, rim bevel apex trajectory 41
7b and rim side image 417c have different types of display lines as shown in the example, or color CRT display 41
It is desirable to display each image in a different color by using.

As shown in FIG. 8, the image creating circuit 42 displays the index image 418 with “MAX” notation for indicating the position of the maximum edge thickness radial movement ( _k ρ _c , _k θ _c ), and the minimum edge thickness movement. Diameter (
Index image 419 with “MIN” notation for wetting the position of _k ρ _d , _k θ _d ) and the intermediate edge thickness radius vector ( _k ρ _e ,
_The index image 420 with “MID” notation for indicating the position _k θ _e ) and the index image 421 with “S” notation indicating the reference radial position are displayed on the display images 417a, 417.
It can be displayed overlaid on b and 417c. Since the positions of the minimum edge thickness radius and the reference radius match in the illustrated embodiment, the index image 419 and the index image 421 match.

The image creating circuit 42 further reads the bevel curve CF of the lens frame 501 stored in the data memory 612 of the frame shape measuring apparatus 1 via the arithmetic / control circuit 21, and causes the bevel curve display unit 424 to display a numerical value.

Step S-9 (Changing the side surface position): The arithmetic / control circuit 21 commands the image forming circuit 42 to display the question sentence "Do you want to change the side surface position?" On the message display 423 of the display 41.

Display images 417a, 417b, 41 displayed on the display 41
Reference numeral 7c is an image of the lens and the lens frame rim viewed from the upper side. When the operator determines that the side position need not be changed, the operator operates the next stroke key 412 to execute the next step S-1.
Move to 1.

For example, in the case of the lens frame shown by the chain double-dashed line in FIG. 13B, the maximum edge thickness radius vector ( _k ρ _f , _k θ _f ) is X _k −Y _k
Since the maximum edge cross-sectional image 431 is displayed on the display 41 because it is located in the fourth quadrant of the coordinate plane, the maximum edge thickness radius vector portion is not displayed on the upper side image display. This is an index image 41 to show the maximum edge thickness radial position.
The operator can easily judge from the fact that 8 is not displayed in the upper side image display.

When the operator wants to see the side surface image to which the maximum edge thickness radius vector ( _k ρ _f , _k θ _f ) belongs, the operation proceeds to step S-10.

Step S-10 (specify side surface position): The operator operates the side surface position specification key 410 to specify a desired side surface position. The maximum edge radius radius ( _k ρ _f ,
To view the side image to which _k θ _f ) belongs, operate the “ear” key. The arithmetic / control circuit 21 receives this command and X _k −
The above steps S-7 and S-8 are executed with respect to the radii belonging to the quadrant IV and the quadrant I of the Y _k coordinate plane, and the lens edge side image 417a on the ear side, the rim bevel apex trajectory 417b, and the rim side image.
Display 417c as an image.

Step S-11 (lens frame position change): The calculation / control circuit 21 causes the message display portion 423 of the display 41 to be displayed.
The image forming circuit 42 is instructed to display the question sentence "Do you want to change the lens frame position?"

The operator operates the next stroke key 412 when determining that the change is not necessary.

When the arithmetic / control circuit 21 receives a command from the next stroke key 412, it calculates the 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 to the lens L. Lens bevel apex position information (ZK _n , _k θ _n ) as control data for the motor 37 for moving the carriage and the motor 37 for rotating the lens axis of the lens processing unit (not shown) during grinding
Is input to the lens bevel vertex memory 25 and stored.

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

Step S-12 (entire shift / portion): 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 radius position, the operator The entire lens frame is moved in the Z _k axis direction with respect to the lens L, or
Assuming that the curve of 501 is changed, a part of the lens frame, that is, the minimum edge radial position, the maximum edge radial position, or the intermediate edge radial position is selected. When selecting "Whole". By operating the entire shift key 401 of the input / output keyboard 40, the next step S-1
When the "partial movement" is selected in step 3, the partial shift key 411 is operated to proceed to the next step S-15.

Step S-13 (shift amount input): The "+" key 408 or the "-" key 409 is operated to input the Z _k- axis direction movement amount α of the lens frame as shown in FIG.

Step S-14 (Rim surface / bevel apex position calculation): The arithmetic / control circuit 21 causes the rim front / bevel apex memory 24 to store the rim front surface position information (ZF _n , _k ) of the lens frame 501.
θ _n ), bevel apex position information (ZE _n , _k θ _n ) and rim rear surface position information (ZB _n , _k θ _n ) are read out, and the movement amount α input in the previous step S-13 is used. Of the new rim front surface position information (ZF _n ′, _k
θ _n ), bevel apex position information (ZE _n ′, _k θ _n ) and rim rear face position information (ZB _n ′, _k θ _n ) are stored in the rim surface / bevel apex memory 24, and are again stored in the next step S-5. Will be returned.

At the next step S-5, the new rim front surface position information (ZF _n ′, _k θ _n ) and the bevel vertex 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 to execute FIG. A maximum edge cross-sectional image 431, a minimum edge cross-sectional image 432, an intermediate edge cross-sectional image (not shown), a lens edge side image 417a, a rim bevel apex trajectory 417b, and a rim side image 41 as shown in FIG.
7c is displayed as an image.

Further, from the new rim front surface position ZE _n ′ and the lens front side refracting surface position F _n , the deviation amount Z = η ₁ ′ (maximum edge radial position), Z = η ₂ ′ = η ₂ −α (minimum edge movement The radial position) is calculated and displayed.

After that, the above-mentioned steps S-9 to S-11 are similarly executed, and the operator performs "whole movement" at step S-11 this time.
Satisfied with the relative positional relationship between the rear lens L and the lens frame 501,
Bevel vertex position information (ZE _n ′, _k after this “whole move”)
When it is determined that the lens L may be ground by θ _n ), the next process 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, the new bevel position information (ZE _n ′, _k θ _n ) of the lens frame rim stored in the rim surface / bevel vertex memory 24 is added to the lens bevel vertex. The position information (ZK _n , _k θ _n ) is input to and stored in the lens bevel vertex memory 25.

Step S-15 (shift position command): When it is desired 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 radius position, operate the "MAX" key 402. If you want to partially move the intermediate edge radial position,
Operate the "MID" key 404.

In the example of FIG. 14, since it is desired to partially move the minimum edge radial position, the “MIN” key 403 is operated.

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

Step S-17 (Rim surface / bevel apex position calculation): The arithmetic / control circuit 21 causes the minimum edge radius of the rim of the lens frame 501 stored in the rim surface / bevel apex memory 24 in the example of FIG. 14 ( The bevel apex position ZE _m corresponding to ( _k ρ _m , _k θ _m ) is read out, and the previous step S-1
ZE _m ′ = ZE _m + λ (13) is calculated with the movement amount λ input in 6, and this is set as the new bevel apex position ZE _m ′.

The arithmetic / control circuit 21 then determines the bevel apex position ZE of the rim of the lens frame 501 corresponding to the reference radius vector (the radius vector located on the Y _k axis, which is ( _k ρ _s , _k θ _s )). By using _s and the same calculation as the above equations (3) and (4), (However, n is a constant and n = 1.523) Obtain a new bevel curve CL.

The arithmetic / control circuit 21 further uses the radius R of the bevel locus surface to determine a new bevel apex position ZE _n ″ corresponding to all the measured radiuses ( _k ρ _n , _k θ _n ). The new rim front surface position ZF _n ″ and the new rim rear surface position ZB _n ″ are calculated in the same manner as the expressions (9) and (10). From these new bevel apex 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 next step S
Return to -5 again.

In the next step S-5, this new rim front position (ZE
_n ″, _k θ _n ) and rim rear surface position information (ZB _n ″,
_The cross-sectional image information creation is created by the same operation as described above using _k θ _n ), and the following steps S-6 to S-S8 are executed and the maximum edge cross-sectional image 43 as shown in FIG.
1, minimum edge cross-sectional image 432, intermediate edge cross-sectional image (not shown), lens edge side image 417a, rim bevel apex trajectory 417
b, the rim side image 417c is displayed as an image.

Further, from the new rim front surface position ZE _n ″ and the lens front side refracting surface position F _n , the deviation amount Z = η ₁ ″ (maximum edge radial position), Z = η ₁ ″ = η ₂ −λ (minimum edge movement The radial position) is calculated and displayed.

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

After that, the above-mentioned steps S-9 to S-11 are similarly executed, and the operator performs "partial movement" at step S-11 this time.
Satisfied with the relative positional relationship between the rear lens L and the lens frame 501,
Bevel vertex position information (ZE _n ″, _k after this “partial movement”)
When it is determined that the lens L may be ground by 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 uses 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 as the lens bevel apex position information (Z
K _n ″, _k θ _n ) is input to and stored in the lens bevel vertex memory 25.

A side display image including the lens edge side image 417a, the rim bevel apex trajectory 417b, and the rim side image 417c described above.
417 allows the operator to attach the lens L after grinding to the lens frame 5
It is possible to predict in advance at which radial position and how far the lens L protrudes from the lens frame rim when framed in 01, and the side display image 417 and cross-section display image 4
Using 31,432,433, the lens bevel apex position information for the grinding process of the lens L can be automatically determined and corrected.

Step S-18 (machining): The operator operates a machining command key (not shown),
The calculation / control circuit 21 grinds the lens L based on the lens bevel vertex position information (ZK _n , _k θ _n ) stored in the lens bevel vertex memory 25.

The grinding operation is the same as the operation disclosed in Japanese Patent Application No. 60-115079, which has been described in detail in this application, and therefore the description thereof is omitted here.

The operation described above is executed by a program stored in the program memory 26 in advance.

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

In the above-described embodiment, the side image of any one of “upper side”, “ear side”, “lower side”, and “nose side” is selectively displayed as an image, but in the present embodiment, grinding of the lens L is performed. The projected shape after processing is developed on the entire circumference of the image as seen from the front of the lens, and the developed image of the lens edge shape and the lens frame rim shape is combined together and displayed as a developed image. is there.

The figure indicated by the chain double-dashed line in FIG. 17 is the expected shape after the grinding process of the lens L based on the measured radius information ( _k ρ _n , _k θ _n ) stored in the measured radius memory 23.

The arithmetic / control circuit 21 reads the bevel apex position information (ZE _n , _k θ _n ) of the lens frame rim from the rim surface / bevel apex memory 24 and the reference bevel corresponding to the reference radius vector ( _k ρ _d , _k θ _d ). Apex position ZE _d and bevel apex position ZE _d corresponding to other measured radials ( _k ρ _q , _k θ _q ), where q = 1, 2, 3,
・ ・ ・ D−1, d + 1 ・ ・ ・ N) and the difference π _q is π _q ＝ ZE _q −ZE _d・ ・ ・ (18) (Here, both q = 1,2,3, ・ ・・ D-1, d + 1 ...
N) and defines that the reference bevel apex position ZE _d is located on the above-mentioned expected shape line indicated by a two-dot chain line, and this difference π _q is set to the reference bevel apex position ZE for each corresponding radial angle _k θ _{q. It} is added to _d to obtain the expanded bevel vertex locus 811 and the image is displayed on the display 41 as shown in FIG.

The arithmetic / control circuit 21 then proceeds to the expanded bevel vertex locus 81.
The rim front surface image 812 is arranged inside the expanded bevel apex locus 811 and the developed rim rear surface image 813 is arranged outside the expanded bevel apex locus 811 in parallel with 1 at an interval of half ε / 2 of the rim thickness ε / 2. The image is displayed on.

The arithmetic / control circuit 21 further includes the lens front refractive surface position information (F _n ,
_k θ _n ) and the bevel apex position information (ZE _n ,
_k θ _n ) and the lens back side refracting surface position information (B _n ,
_k θ _n ) and the bevel apex position information (ZE _n ,
The difference τ _n with _k θ _n ) is μ _n = F _n −ZE _n ··· (19) τ _n = B _n −ZE _n ··· (20) for each radial angle _k θ _n. ) (Here, both n = 1,2,3, ... N) This difference μ _n is added to the expansion bevel apex locus 811 for each corresponding radial angle _k θ _n , and the expansion lens front side refracting surface image 801 is obtained and an image is displayed on the display 41 as shown in FIG. Similarly,
The difference τ _n is added to the expanded bevel apex locus 811 for each corresponding radial angle _k θ _n to obtain the expanded lens rear side refracting surface image 802, and the image is displayed on the display 41 as shown in FIG.

A developed display image 800 including the developed lens front refraction surface image 801, the development lens rear refraction surface image 802, the development bevel apex trajectory 811, the development rim front image 812, and the development rim rear surface image 813.
Is configured.

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

Based on the developed display image 800 described above, when the operator inserts the lens L after grinding into the lens frame 501, it is possible in advance to know in advance at which radial position and how far the lens L protrudes from the lens frame rim. It is possible to predict, and the lens bevel apex position information for the grinding process of the lens L can be automatically determined and corrected using the developed display image 800 and the sectional display images 431, 432, 433.

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 configured in a ball-slicing machine having a processing portion whose illustration and description are omitted, or each device is electrically connected to the ball-slicing machine in an independent configuration. May be.

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 maker or its agent. You may.

(Effects of the Invention) As described above, according to the frame shape measuring device of the present invention or the ball shaving machine having each of them, the lens frame rim thickness of the spectacle frame can be automatically measured.

[Brief description of drawings]

FIG. 1 is a perspective view showing a mechanical structure of a lens frame shape measuring device according to the present invention and a block diagram showing a circuit structure thereof, and FIG. 2 (A) is a perspective view showing a frame holding device portion. (B) and FIG. 2 (C) are longitudinal midline sectional views for explaining the holding action of the spectacle frame of the frame holding device section, and FIG. 3 (A) is a schematic diagram showing the relationship between the supporting device section and the measuring section. Fig. 3, Fig. 3 (B) is a sectional view thereof, Fig. 4 is a partially cutaway side view showing a sensor head portion, and Fig. 5 is a schematic diagram showing a relationship for obtaining the geometric center from the measured value of a lens frame, 6 (A) and 6 (B) are schematic diagrams for explaining how to obtain the rim bevel curve of the lens frame, and FIGS. 7 (A) and 7 (B) are rim thicknesses of the lens frame. Frame holding device and supporting device for explaining the operation of the lens frame shape measuring device for obtaining FIG. 8 is a block diagram showing a configuration of a lens shape measuring device and a bevel position display device of a ball mill according to the present invention, and FIG. 9 is an 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, and FIG. 11 is a diagram for determining the rim front face position from the bevel apex position of the rim of the lens frame. Fig. 12 is a schematic diagram for explaining the measurement principle of the front refractive surface position of the lens and the rear refractive surface position of the lens, Fig. 13A is a side display image and a cross-sectional display image and each of them. FIG. 13B is a schematic diagram for explaining the relationship between the side display image, the cross-section display image, and the measured radius of FIG. 13A, and FIG. 14 is the side display image and the cross-section. A schematic diagram showing another example of the display image, FIG. 15 is Fig. 14 is a schematic diagram showing changes in the side view image and cross-section display image in Fig. 14 when the lens frame is moved as a whole. Fig. 16 shows changes in the side view image and cross-section display image in Fig. 14 when the lens frame is partially moved. Fig. 17 is a schematic diagram for explaining the expanded bevel apex locus, Fig. 18 is a schematic diagram showing an example of a developed display image, and Fig. 19 is another embodiment of the lens frame shape measuring device. A plan view, 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, and FIG. 22 is IIXII-IIXII of FIG. ′ Is a cross-sectional view. 1 …… Lens frame shape measuring device 3 …… Lens shape measuring device 4 …… Bevel position display device 21 …… Computation / control circuit 40 …… Input / output keyboard 41 …… Display 42 …… Image creation circuit 43 …… Symbol Image memory 100 …… Frame holding device section 152,1011 to 1013,1021 to 1023 …… Holding bar 156 …… Stepped section 200 …… Supporting device section 233 …… Rim thickness detecting device section 300 …… Measuring section 417 …… Side view image 431,432,433 …… Section view image 800 …… Expanded view image 1001a, 1002a …… Inside surface of movable support rail

Claims (6)

[Claims] 1. A frame shape measuring device for measuring the shape of a lens frame of an eyeglass frame, comprising: at least two contact members contacting a front surface and a rear surface of a rim of the lens frame; and an amount of movement of at least one of the contact members. A frame shape measuring device, comprising: a detecting unit that detects the thickness of the frame; and a calculating unit that calculates the thickness of the rim from the detection result of the detecting unit. 2. A frame shape measuring device for measuring the shape of a lens frame of an eyeglass frame, comprising at least two pairs of abutting members which come into contact with a front surface and a rear surface of the rim of the lens frame, and which holds the rim at at least two places. Lens frame holding means, a detection means for detecting the relative movement amount of at least one set of the contact members of the lens frame holding means, and a calculation means for obtaining the rim thickness from the detection result of the detection means. A frame shape measuring device characterized by having. 3. A frame shape measuring device for measuring the shape of a lens frame (501) of an eyeglass frame (500), wherein a holding means (152,156b) for holding the front and rear surfaces of the rim of the lens frame (501) is provided. Frame holding means (10) provided with two base members (150, 153) which are provided close to and away from each other and have abutting sides (151a, 153a) at both ends.
0), and the contact sides (151a, 151a,
153a) abutting two slopes (215, 21) facing each other.
Two hand members (211,212) formed with 6,217,218)
A supporting means (200) for supporting the frame holding means (100), a measuring means (233) for measuring a relative movement amount of the two hand members (211, 212), and a measuring means (233). ), And a calculation means (613) for calculating the thickness (ε) of the rim from the measurement result of (1). 4. The hand members (211, 212) are characterized in that the two slopes (215, 216, 217, 218) of each of the hand members (211, 212) are inclined symmetrically with respect to the reference plane (S) at mutually equal angles. 4. The structure according to claim 3, wherein when the frame holding means (100) is supported, a predetermined point of the bevel apex locus of the rim coincides with the reference surface (S). Frame shape measuring device. 5. The frame shape measuring device according to claim 1, further comprising display means for displaying the rim thickness obtained by the computing means. 6. A ball-slicing machine comprising the frame shape measuring device according to any one of claims 1 to 5.