JP2794279B2 - Lens frame shape measuring device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an eyeglass frame lens.
The present invention relates to a lens frame shape measuring device for measuring a frame shape.
You. [0002] 2. Description of the Related Art A lens is placed in a lens frame of an eyeglass frame.
In order to achieve this, a template processed according to the shape of the lens frame
Based on a template plate lens grinding machine for fabric spectacle lenses
Cutting devices have been in practical use for some time. On the other hand, the inventor
Is a troublesome process of manufacturing a template in the lens grinding apparatus.
The lens frame of the eyeglass frame directly to eliminate
Digital measurement, and based on the measured value,
Proposal of so-called direct-type lens grinding device for grinding
doing. [0003] Problems to be solved by the present invention
For lens frame shape measuring device installed in lens grinding device
Position between the fine bevel groove on the lens frame and the feeler.
Difficult and cumbersome to match the position, other measurement procedures
Even if is automated, this task reduces measurement efficiency,
As a result, there is a possibility that the measurement accuracy is reduced. [0004] SUMMARY OF THE INVENTION The present invention relates to a conventional lens frame shape measuring apparatus.
It was made in view of the above-mentioned problems related to
Lens frames of various shapes without deformation
Automatically place the feeler in the bevel groove
Measurement can be performed efficiently and accurately.
To provide a lens frame shape measuring device capable of
You. [0005] The present invention has been accomplished in order to achieve the above object.
It has the following structural features. That is, the lens of the present invention
Closed frame shape measuring device is a vertical frame of the lens frame of the eyeglass frame.
A pair of contact members for contacting the arm from above and below,
Approximately the center of the upper and lower rims contacted by the members
Holding means for pressing and holding the lens frame from a direction, and a bevel of the lens frame
Measuring means with a feeler for measuring the shape of the groove;
Movement for relatively moving the holding means and the measuring means
Means, and the upper and lower parts held and held by the holding means
The feeler is placed on a plane passing through the bevel groove at the approximate center of the rim.
Are arranged to be arranged. [0006] 【Example】 (Description of Example)Overview of the device FIG. 1 shows a grinding apparatus, that is, a grinding machine of a ball mill according to the present invention.
It is a perspective view which shows a process part. A rough whetstone in the whetstone chamber 2 of the housing 1
3a, beveled grindstone 3b, circle consisting of flat precision processing grindstone 3c
Mold wheel 3 is housed, and this wheel 3
It is attached to the rotating shaft 5. Pulley 4 is a whetstone
The rotating shaft of the motor 6 is connected to the
The grindstone 3 is rotated by the rotation of the stone motor 6. [0007] Bearings 10 and 11 formed in the housing 1 include:
The carriage shaft 12 is rotatable and slidable in the axial direction.
And one end is formed on a feed bar 20 described later.
It is rotatably fitted into the formed bearing 21a. this
Arms 14 and 15 of carriage 13 adhere to the carriage shaft
Have been. A lens LE to be processed is provided on the arms 16 and 17.
Attached lens rotation shaft 18 for chucking and rotation
Have been killed. One axis 18a of the lens rotation axis 18
A chucking handle 19 is attached to the
By rotating, the shaft 18a slides in the axial direction,
Chucking Also, the carriage shaft 12 has a key.
The lens to be described later can be swung coaxially with the swing axis of the carriage 13.
The arm 31 of the size measuring device 30 is attached. A wheel 22 is mounted on a substrate 21 of a feed base 20.
The wheels 22 are mounted on the housing 1
Roller 23 so that it can be rolled.
It is movably held along the rail 23. Slide 2
0 female screw part 24 rotates coaxially with the rotation axis of the motor 40.
And the rotation of the motor 40
The feed bar 20 is moved left and right as shown by the arrow 25.
You. The bearing 21a is formed on the feed base 20 as described above.
The carriage shaft 12 is mounted on this bearing 21a.
Is attached, the carry
The edge 13 also moves left and right. Further, the substrate 21 of the feed base 20 is
Shafts 26, 26 'are implanted,
The stopper 27 is attached to the shaft so that it can move up and down.
You. A female screw portion 28 is formed on the abutment member 27.
And the feed motor 42 rotates against the female screw portion 28.
The feed screw 43 fixed coaxially with the shaft is engaged,
The contact / stop member 27 is moved up and down by the rotation of the motor 42.
It is configured as follows. A cap is provided on the upper surface of
It is attached to the tip of the arm 16a protruding from the ridge 13.
The rotating wheel 16b is in contact with the upper and lower
The carriage 13 is configured to swing by movement.
You. [0010]Lens frame measuring means FIG. 2 shows a spectacle lens frame according to the present invention or
Digitally measure the shape of a preformed die
FIG. 4 is a perspective view showing an example of a measuring unit for the present invention. carriage
Tension of the lens rotation axis 18 that protrudes outside the arm 16 of the thirteen
The extension shaft 18b is provided with a bearing 50 formed on the carriage 13.
It is inserted through. Rectangular shape at end 18c of shaft 18b
One long side of the detection arm 51 composed of a bar-shaped frame
The frame 52 is mounted in a direction perpendicular to the rotation axis of the shaft 18b.
Have been. A detector 54 slides on the other long side frame 53.
The detector frame 53 is movably mounted.
It is always pressed to the frame end side by the inserted spring 59.
ing. The short side frames 55 and 56 of the detection arm 51
Pulleys 57 and 58 are rotatably mounted. one
A pulley 60 is rotatably inserted into the shaft 18b.
The pulley 60 is coaxially
A plate 62 is fixedly provided. The detection head 62a of the encoder is
It is fixed to the outer surface of the arm 16 of the jig 13. The first wai
One end of the gear 80 is fixed to the detector 54 and the pulley 5
7 and the other end of the pulley 60
It is fixed to the side. The second wire 81 is one of them.
The end is fixed to the detector 54 and the pulley 58
After winding the wire in the opposite direction to the first wire, pull the other end
-60. Thereby, the detector 54
Of the sliding movement of the pulley 60 on the frame 53
It is read as the rotation amount of the code plate of the encoder 61.
Is configured. The detector 54 is, as shown in FIG.
A sliding seat 541 slidably inserted into the
Axis O for moving seat₁And the axis O₁Axis
Detection feeler 542 slidably mounted in the direction
It is composed of The feeler part 542 rotates and slides
Contact for detecting a template with a semicircular cross section formed by notch on shaft 543
544 and a substantially U-shaped member attached to the rotary sliding shaft 543
Arm rotatably attached to the end of the arm member 545.
And a contact frame 546 for detecting the lens frame. contact
Contact surface 544a of contact 544 and contact peripheral surface of contact wheel 546
546a is axis O₁Is configured to be located on
You. In the vicinity of the other end of the rotary sliding shaft, in parallel with the contact surface 544a.
A pin 547 is fixed through the pin.
When it is in the initial position, the hook attached to the long side frame 52
The side surface is in contact with the stop member 548. The carriage 13 has a lens shaft rotation mode.
And a spur rotated by the rotation of the motor 70.
Sprockets with rocket wheels 72 and 73 at both ends
The shaft 71 is built in. Also, the lens rotation shafts 18 and 18a
Are equipped with sprocket wheels 74 and 75, respectively.
The tune 76 is attached to the
Rockets 73 and 75 are tuned by tune 77
The rotation of the motor 70 is synchronized with the rotation of the lens rotation axis.
It is configured to transmit. On the other hand, the eyeglass frame holding means 90
When the pedestal 91 is located at the initial fixed position of the carriage 13
It is installed in a relationship parallel to the longitudinal direction of the arm 16
You. The pedestal 91 has the length of the arm 16 of the carriage 13.
Two rails 92 and 93 are attached parallel to the hand direction,
On the rails 92 and 93, an eyeglass frame holder support member 94,
95 is slidably disposed. Support members 94 and 95
Is constantly pulled by a spring 96. Of the supporting member 95
A feed screw provided on the rotation shaft of the motor 97 is attached to the foot 95a.
The jaws 97a are engaged. The arms 94 of the support members 94 and 95
b and 95b are for holding the eyeglass frame holder 100
Holding tools 94c and 95c. The eyeglass frame holder 100 is shown in FIG.
A base plate 101 having a circular opening 102 in the center;
Attached slidably on this base plate 101 facing each other
With the spectacle frame holding arms 103 and 104 and the spectacle frame
And an equalizer 105 for holding down
I have. The eyeglass frame 200 has a circular lens frame 201 to be measured.
Holding arms 103 and 104 so as to be positioned on
Hold the upper and lower rims of the lens frame with
At step 105, the lens frame is pressed and fixed. At this time
The edge 105a of the front end of the user 105 and the rear end of the rear
The edge 105b is the notch 1 of the holding arms 103 and 104, respectively.
03a, 104a, the front edge of the base plate 101
101a and a rear edge 101b (not shown) are edges
It is located on the same plane as 105a and 105b. [0016] The holder holding the spectacle frame 200 as described above.
100 is held between the holding tools 94c and 95c. here,
With respect to the bevel groove center 201b of the lower rim of the lens frame,
After the rear end 105b of the equalizer 105 and the base plate
The base is separated from the side edge 101b by the same distance d.
Plate 101, equalizer 105, notch 103a, 1
04a is constituted. On the other hand, the clamps 94c, 95c
Are formed with sloped grooves 94d and 95d.
FIG. 4 shows the holding tool 100 with the holding tools 94c and 95c.
The edge of the rear end of the equalizer 105
105b and the rear edge 101b of the base plate
So that the center of the contact interval of
Dynamically pinched. This allows the lower rim of the lens frame
The bevel groove center 201b is the slope groove of the holding tools 94c and 95c.
Match the center. With the above-mentioned spectacle frame holder supporting members 94 and 95,
When supporting the template, as shown in FIG.
Use 110. The template holder 110 is a support frame 1
11 and cylindrical members 112, 11 attached to both ends thereof
3 and a template mounting planted in the center of the support frame 111
Support 114 and pin 1 implanted on the end face of this mounting support
14, 115, and 116. Template 21
0 is the pin 11 by a hole formed in advance.
4, 115, 116 to fit the mounting column
The template holder is held between support members 94 and 95.
It is supported by having. [0018]Operation of measuring means Next, the spectacle lens frame by the measuring means having the above configuration
Will be described below. Glasses holder 100
It is sandwiched between the support members 94 and 95, and is carried by the motor 40.
Is moved by a predetermined amount in the direction of arrow A (see FIG. 1).
After that, the lower groove of the lens frame 200 at the initial set position.
201 and contact wheel 546 so as to contact on the same plane
Then, the motor 97 is rotated, and the holder 100 is moved to the rail 9.
2 and 93, and move by a predetermined
Rotation center O of output arm 51_TwoIs located inside the lens frame
To do. At this time, the lower groove 201 of the lens frame 200 is
At the same time as the hook 546 is hooked, the pin 547 is
548, and the rotary sliding shaft 543 can be freely rotated.
So that The amount of movement of the detector 54 on the frame 53
Is converted to the rotation of the encoder by wires 80 and 81
Is done. Now, as shown in FIG.
In the initial fixed position of the detection arm 51 and the detection arm 51, as shown in FIG.
As described above, the detector 54 does not come into contact with the
Axis O when emitted and in initial position₁Origin 0 on the line
From the origin 0 to the rotation center O of the detection arm 51._TwoUntil
Is the distance of L, and the above-mentioned fixed amount of movement and detection of the spectacle frame
Encoder by moving detector with rotation of arm
And the resolution of the encoder is e.⁰/ Pu
lse, the resolution obtained by converting the displacement of the detector at this time is d
(Mm) / pulse, and the detection arm 51
Is parallel to the arm 16 of the carriage 13.
If this is the reference angle 0 °, the rotation angle θn of the detection arm 51
In this embodiment, the moving radius ρn of the lens frame at
The amount of movement of the detector 54 on the detection arm 51 is determined by an encoder.
Including the amount of rotation of the detection arm when detecting with 61
Is detected by ρn = L− (Cn−θn / e) d (1) Given as Note that θn = 0 from equation (1).
That is, the moving radius ρ0 at the reference position is ρ₀= L-Cod (2) Given as In this manner, the detection arm 51 is connected to the lens
If the entire circumference of the frame is rotated, the rotation center O_TwoIn
Shape information (ρn, θn) of the lens frame 200 (where n =
0, 1, 2, 3,... N) are obtained as digital values.
You. This (ρn, θn) indicates that the rotation center of the detection arm 51 is
Any position O on the lens frame_TwoData when located in
When the rotation center is located at the geometric center of the lens frame 200
It's not data. 8 and 9 show a method of correcting this.
This will be described based on the schematic diagram shown in FIG. Detection when the carriage 13 is at the initial position
Rotation center O of output arm_TwoAnd the carriage swing center O
X- where the connecting straight line is the Y axis and the axis orthogonal to this is the X axis
Taking a Y orthogonal coordinate system, the lens frame measurement data (ρn,
θn) Xn = ρn × cos θn (3) Yn = ρn × sin θn (3) Coordinate transformation based on the polar coordinate-Cartesian coordinate transformation formula
Coordinate values. Lens frame data (x
n, yn), minimum value coordinates in a direction parallel to the X-axis direction
Point A (xa, ya) and maximum value coordinate point C (xc, yc)
, And a minimum coordinate point D (x
d, yd) and the maximum coordinate point B (xb, yb)
Stop, now       O_Three(X_Three, Y_Three) = (Xc−xa / 2, yb−yd / 2) (4) Center O of the lens frame given as_ThreeAsk for.
Rotation center O at initial measurement _Two(X₀, Y₀) And (4)
Determined center O_Three(X_Three, Y_Three) Difference x₀-X_Three=
Δx, y₀-Y_Three= Δy, and the rotation of the motor 97
Moves the eyeglass frame holding stage 90 by Δy. Also,
Δx is given by the swing amount of the carriage 13. This shaking
The movement is given by the vertical movement amount h of the abutment stop member 27.
In this embodiment, the swing radius of the rotation center of the detection arm is
M and the swing radius m of the rotating wheel 16b up to the contact point is M = 2.
m Δx ≒ M tan β h ≒ m tan β Therefore, Δx ≒ 2h (5) By moving the stopper by the amount of h,
The center of rotation of the extension arm is the geometric center of the lens frame O_ThreeMatches
Let it. Next, the detection arm 51 is rotated by the angle β to
Make corrections. Thus, the detection arm 51 is moved to the geometrical shape of the lens frame.
With the detection arm at the center of the
Or rotated by the detector and the shape information (ρn,
θn) is obtained as a digital value, and is stored.
You. [0022]Template measuring means FIG. 10 shows a template when a template is used instead of a lens frame.
It is a schematic diagram which shows the method of shape measurement. Same as FIG. 7 above
One component is denoted by the same reference numeral, and the following description is omitted.
I do. In the case of template measurement, the template detection contact 544 is
The detection arm 51 is rotated by contacting the
By turning, the shape is measured. Detected in template
Center of rotation O of arm 51_TwoA pre-determined source to contain
Move a predetermined distance from point 0. Also, the detection arm
The moving radius tpn when located at the angular position θn is tρn = (Cn−θn / e) d−L (6) And the moving radius tρ at the reference angle θ0
0 is tp0 = Cod-L (7) Given as The template shape information (tpn,
θn) (n = 0, 1, 2, 3,... N)
Find the geometric center and set the rotation center of the detection arm at that position.
Moving, remeasurement, and storing the data
This is similar to the case of the lens frame measurement described above. This implementation
In the example, as shown in FIG.
Contact point 546a of contact wheel 546 and contact member 54 for a lens
4 contact surfaces 544a are both rotating shafts of the rotary sliding shaft 543.
Line O₁On the contact ring 5 during measurement.
46 or the contact 544 receives the contact pressure.
So that 5 is located in the normal direction of the contact surface at the contact point
By rotating the rotary sliding shaft, accurate measurement can always be performed. [0024] [Grinding work Next, the lens frame or mold thus obtained
A configuration to grind an unshaped lens based on the measured value of the plate and
The operation will be described with reference to FIG. Lens rotation axis
18 and 18a (see FIG. 1) to chuck the unshaped lens.
Drive the grinding wheel rotation motor 6 to rotate the grinding wheel 3
The unshaped lens is pressed against the grindstone 3 by the weight of the carriage.
Let it be processed. In the present invention, the unshaped lens LE is the lens described above.
Shape measurement value of the closed frame or template (ρn, θn) (n = 0,
1, 2, 3,... N)
It is processed. Check the amount of carriage swing Ln
In this embodiment, the linear encoder 610 is used for
doing. One end of this encoder is a lens measurement device
Attached to the side of arm 31 of 30 so as to be pivotable about fulcrum P
The scale 611 and the side of the carriage 13
And a detection head 612 movably mounted.
ing. The amount of movement of the carriage given by the swing amount Ln of the carriage
The rotation angle γ is also the same as the rotation angle γ of the detection head 612.
is there. The detection head associated with the rotation of the carriage
Movement is detected as a scale reading. here
In this embodiment, the scale 611 is rotatable about the fulcrum P.
Reading e of the detection head₁~ E_TwoThe distance between them is actually
e₁'~ E_TwoIs given. On the other hand, the rotation of the carriage
An arc 613 having a radius equal to the distance Rs between the shaft 12 and the fulcrum P
The string length P stretched at the carriage rotation angle γ is the distance C
Encoder 6
The reading amount of 10 is the length of the chord of the rotation angle amount γ of the carriage directly.
It is configured such that twice the amount becomes the swing amount Ln.
In this way, the progress of the machining is sometimes
When processing the moving radius ρ while checking each time,
The internal thread 28 of the material 27 contacts the rotating wheel 166,
The above processing is stopped, and then the lens axis rotation motor 7
Rotate 0 by the same amount of unit angle as when measuring the lens frame
Then, the lens LE is rotated to the position of θn ′, and its radial value ρ
The lens LE is processed until n ′ is obtained. This
Lens frame measurement data (ρn, θn) (n = 0, 1, 2,
3) N) Repeated lens frame measurement values for all
The lens processing based on it is performed. [0026]Lens measuring means Next, based on FIGS. 12 to 16, the lens measurement of FIG.
The configuration of the device 30 will be described. Vertically from the arm 31
Shafts 302 and 303 are implanted on the overhanging base 301.
One end of the link arm 304 is turned around the shaft 302.
It is movably mounted, and a link arm 305 is attached to the shaft 303.
Is rotatably mounted at one end. Link arm 3
The other ends of 04 and 305 are both ends of the link bar 306, respectively.
Shafts 307, 30 provided on arm portions 309, 310 of
8 and are rotatably mounted on these link arms.
304, 305 and link bar 306 are parallel link mechanisms
Is composed. For each of the arm parts 309 and 310
Are axes 311, 31 parallel to the running direction of the link bar 306.
2 passes through deformed oval-shaped frames 317 and 318, respectively.
It is planted through. The other ends of shafts 311 and 312 are
It is rotatably fitted into the oval shaped frames 313 and 314.
Have been. A U-shaped arm 315 is provided at an intermediate portion of the shaft 311.
The shaft member 315 having a is slidably inserted on the shaft.
The shaft member 315 is further attached to the bearing portion 31 of the bridge 316.
6a is rotatably inserted. The piece 316 is at the top
With a pin 319 implanted in
The slit 320a of the member 320 is slidably fitted.
I have. The other end of the arm member 320 is planted on the base 301.
It is rotatably supported on the shaft 321 provided. Likewise
A shaft having a U-shaped arm 322a in the middle of the shaft 312
A member 322 is slidably inserted on a shaft.
The member 322 further pivots on the bearing portion 323a of the piece 323.
Has been inserted. Piece 323 was planted on top of it
One end of the arm member 325 is formed at the stepped portion of the pin 324.
The slit 325a is slidably fitted. This
The other end of the arm member 325 is planted on the base 301.
It is rotatably supported on a shaft 326. Each side of the arm members 320 and 325 has a base.
Attached to the rotating shaft of motor 330 attached to base 301
It is rotatably attached to both ends of the arm piece 331
Wheels 332, 333 are in contact. Arm
In the middle part of the material 320, the detection head 3 of the encoder 334 is provided.
35 is rotatably suspended about a shaft 336.
Encoder scale 337 in the detection head 335
It has been inserted. One end of the scale 337 is a base 301
Are held rotatably. Similarly, the arm member 325
The detection head 339 of the encoder 338 is suspended in the middle of
And the scale 340 is inserted therethrough. Frames 317 and 318 have frame 31
3 and 314, link bars for retaining them
-306, two rail members 341 and 342 running parallel to
Are attached at both ends. These rail members 34
The frames 313 and 314 held by the
Both ends of the member 345 are fitted, and the inside of the cylindrical member is the same.
A cylindrical member 343 is slidably fitted on the shaft. Tube member
At the end of 343, a groove 343a is formed on the circumferential surface.
The groove 343a has a U-shaped arm 3 of the shaft member 315.
15a is rotatably inserted. Similarly frame 3
14, the other end of the cylindrical member 345 is fitted.
A cylindrical member 346 is rotatably fitted in the member 345 coaxially.
Have been. A groove 346a is also formed on the circumferential surface at the end of the cylindrical member 346.
Is formed in the groove 346a.
U-shaped arm 322a is rotatably inserted. A slope 347a is provided outside the cylindrical member 345.
348 having a ring 347 and an inclined surface 348a
Are slidably fitted. On the peripheral surface of the cylindrical member 345
Has a slot groove 345a formed in parallel with the axial direction.
The pins 349 and 350 penetrate into the slot grooves.
The pin 349 is connected to the ring 347 and the cylindrical member 343.
Have been. The pin 350 is connected to the ring 348 and the cylindrical member 3.
46. Further, the cylindrical members 343, 346
Are penetrated by pins 351 and 352, respectively.
A spring 353 is stretched between the pins 351 and 352.
I have. The cylindrical members 343 and 346 are normally held by the spring 353.
Sometimes, force is applied to reduce the distance between each other,
Ring 34 connected via pins 349, 350
7, 348 are also under force to reduce the distance between each other. [0031]Operation of lens measuring means Next, the operation of the lens measuring device having the above configuration will be described.
Will be explained. FIG. 17 shows the shape of the ground lens LE.
To show how to measure the shape with the lens measurement device described above.
It is a schematic diagram. The processed lens LE is
Returned to home position by return. Next, a driving hand not shown
The eccentric cam 360 is rotated by the step, and the lens measuring device is
The cylinder member 34 of the lens measuring device is tilted about the axis 12.
5 is brought into contact with the edge surface of the processing lens LE. Then the lens
The rotation axis is set for each predetermined unit angle as in lens processing.
Rotate stepwise, and then move the finished lens
Measure the diameter ρ ′. The measurement of the radius ρ 'will be described with reference to FIG.
Is used to measure the radial value when machining an unshaped lens
The used encoder 610 is used. When processing,
That moves along with the swing of the carriage 13 on the
The moving radius was measured based on the read value of the output head 612.
A lens measuring device when measuring the radius of the machined lens in 17
The scale that moves with the swing of the arm 31 is fixed.
With the detection head 612 attached to the carriage 13
The points to take are different. Next, lens power is measured by the lens measuring device 30.
The figure shows the measurement of the curve value and the measurement of the edge thickness of the lens.
This will be described with reference to FIGS. Lens measuring device
By rotating the motor 330, the arm member 3 of the arm piece 331
The contact with 20, 325 is released. This contact release
The cylindrical members 343 and 346 are mutually moved by the tension of the spring 353.
Shorten the distance. As a result, the rib connected to the cylindrical member
347 and 348 attach the edge of the processed lens LE to its slope.
In between. The movement of the cylindrical members 343 and 346 at this time is
Acting as rotation of arm members 320 and 325,
The amount of movement of the material, that is, the amount of movement of the rings 347 and 348
Are measured by encoders 334 and 338, respectively. Then, by rotating the motor 70,
Rotate the lens LE to obtain the radial radius for each radial line for each unit angle.
The movement amounts of the rings 347 and 348 are measured. FIG.
0, as shown in the schematic diagram of FIG.
Measured value of ring 347 is fZ _A, The measured value at the B position is f
Z_BAnd the radius at position A is ρ '_A, The radius at position B is ρ '
_BBefore the lens LE defined on the lens rotation axis
The center of curvature of the surface is fZo, and the radius of curvature of the front surface is Rf.
Then       ρ '_A ^Two+ (FZo-fZ_A)^Two= Rf^Two  ・ ・ ・ ・ ・ ・ ・ ・ (8)       ρ '_B ^Two+ (FZo-fZ_B)^Two= Rf^Two  ・ ・ ・ ・ ・ ・ ・ ・ (8) Holds. Calculate Rf from this equation (8)       Cf = n-1 / Rf × 1000 (9) The front curve value Cf of the lens is obtained by the ninth formula. Note that
In equation (9), n is the refractive index of the lens, and is generally
1.523. The measured value of the ring 348 is expressed as bZ_A, BZ_BWhen
If the center of curvature of the rear surface of the lens LE is bZo,
If the curvature radius of the surface is Rb,       ρ '_A ^Two+ (BZo-bZ_A)^Two= Rb^Two  ..... (10)       ρ '_B ^Two+ (BZo-bZ_B)^Two= Rb^Two  ..... (10) Rb from       Cb = n-1 / Rb × 1000 (11) The rear curve value Cb of the lens can be obtained more. The edge thickness ΔA, ΔB is       fZ_A-BZ_A= ΔA (12)       fZ_A-BZ_B= ΔB (12) Given as FIG. 21 shows a ball having the above-described mechanical configuration.
The electrical system for driving and controlling the slide machine is shown in a block diagram.
It is. Microcomputer for various calculations and program control
The arithmetic control circuit 1500 composed of a
Motor 97, motor 70 for rotating the lens axis, lens measuring device
Rotation motor 1208, carriage feed (Z axis) motor
Motor 40, a contact stop moving (X-axis) motor 42, and a grinding wheel.
Motor drive device 12 for driving stone rotation motor 6
00 and encoders 61, 334, 338, and 610.
Counter circuit 1100 for counting the detection signals of
Measurement information of eyeglass frame or template from arithmetic control circuit 1500
Shape memory 1300 for storing the
Mode 1401, liquid crystal display 1402 and interface
Bevel information input / output system 1 comprising a face circuit 1403
400 and bevel information momeri 1600 are connected
I have. [0037]Overall operation of the ball mill Hereinafter, the above configuration will be described based on the flowchart of FIG.
The operation of the ball mill will now be described. (1)Lens frame measurement step Step 1-1: When a start command is input, a calculation system
The control circuit 1500 stores the program in the program memory.
In response, the motor driving device 1200 is operated to feed the carriage.
Frame motor attached to the carriage by rotating the motor 40
The detector 54 of the measuring device is moved to the eyeglass frame holding position. Step 1-2: Motor driving device 120
0 sets the Y-axis feed motor 97 of the lens frame holding device 90 to
Rotate the lens frame 200 to move it to the detector 54
Contact the lens frame, further advance the lens frame, and
Is positioned in the lens frame. Step 1-3: The motor drive device 1200
The motor 70 for rotation of the spindle
Rotation control by clock pulse CP from source generator and detection
Rotate the arm. The detector 54 on the detection arm is
Mimics the lens frame in contact with
On the robot, and the amount of movement is detected by the encoder 61
Then, the detection signal is counted by the counter circuit 1100.
The counter circuit 1100 has a
Click pulse CP from the pulse generator is input
So, in synchronization with this clock pulse, in other words, detection
The moving radius ρ is counted corresponding to the rotation angle θ of the arm. Detection
Radial value set (ρn, θn) in one rotation of the beam (n = 0,
1, 2,... N) are temporarily stored via the arithmetic and control circuit 1500.
It is stored by the frame shape memory 1300. This step
Is the preliminary measurement of the frame shape. Step 1-4: Frame shape memory 1300
Calculation control circuit 1500 based on the preliminary measurement value stored in
After the coordinate transformation according to the expression (3), the expression (4) is used.
Find the geometric center of the lens frame. Then this asked
The center of the rotation axis of the detection arm is located at the geometric center.
(X-axis) motor 42, Y-axis motor 9
7 and the motor 70 for rotating the lens axis
Rotate through 200. Step 1-5: Step 1-3 described above is executed again
And the lens when the rotation center is the geometric center of the lens frame
The radial value of the frame (ρn, θn) (n = 0, 1, 2, 5,...)
n) and its value is stored in the frame shape memory 1300.
Let This is the main measurement of the lens frame. (2)Rough grinding step Step 2-1: Activate the motor drive device 1200
The grindstone motor 6 is rotated. Step 2-2: Activate the motor drive device 1200
By rotating the carriage feed motor 40, the carriage 13
Is positioned on the rough whetstone. Step 2-3: Operation control of the lens axis rotation motor 70
Circuit with a clock pulse from the pulse generator of circuit 1500
And position the lens rotation axis at the reference position of θ = 0.
You. Next, the contact stop moving motor 42 is rotated and the contact stop 2
7. Lowering the carriage 7
13 is swung so that the workpiece
The grinding lens is brought into contact with the rough whetstone to start processing. This and
The operation control circuit 1500 includes a frame shape memory 1300
To control the radial value ρ = ρo when θ = 0 stored in
Input to the circuit as a comparison reference value. Step 2-4: From encoder 610
Is counted by the counter circuit 1100 based on the detection signal of
The arithmetic control circuit 1500 compares the reference value ρo with
The machining is continued at the position of the angle θ = 0 until the machining is completed. became ρo
When the contact stop movement motor 42 is rotated, the contact stop is raised.
Raise the carriage and stop the progress of lens grinding
You. Step 2-5: The lens is rotated by the motor 70
The next angle θ₁Rotate to. At this time,
The path 1500 is obtained from the frame shape memory 1300 by θ₁Corresponding to
Radial ρ₁Is read and set as a comparison reference value. Next
Then, the contact moving motor 42 is reversed, and the contact
And bring the lens to be ground into contact with the grindstone, ₁At
To work. The grinding radius value ρ at this time₁Is encoder 6
10 and the signal is sent to the counter circuit 1100
The comparison reference value ρ is calculated by the arithmetic and control circuit 1500.₁When
Compare and ρ₁Continue grinding until ρ₁When
Stop moving motor 42 is operated by motor drive device 1200
And raise the carriage to stop grinding. This step
Of the lens rotation axis, that is, one rotation of the lens rotation axis.
Execute until the rotation angle θn is reached, and
And the frame radius (ρn, θn) (n = 0, 1, 2,... N)
Processing while comparing. Step 2-6: The lens rotation axis is
→ When grinding of the lens to be ground has been completed
Rotate the stop movement motor 42 and move the carriage to the reference position.
To the turning position, and simultaneously stop the rotation of the grinding wheel motor 6.
You. (3)Lens measurement step Step 3-1: According to a command from the arithmetic control circuit 1500
A lens measuring device turning module via a motor driving device 1200
The rotation of the motor 1208 and the lens measurement device of the eccentric cam 360
The holding of the device 30 is released and the measuring device 30 is rotated by its own weight.
Then, the cylindrical member 345 is brought into contact with the processed lens. Step 3-2: Connect via motor drive device 1200
Arm motor 330 to rotate the arm pieces 320 and 325
Release the holding, and use the rings 347 and 348 to
Insert the bar. Step 3-3: Rotate the lens axis rotation motor 70
And rotate the roughly ground lens. Encoder 610
Radial value ρ'n for each rotation of the lens axis (n = 0, 1, 2,.
· N), for example, taking FIG. 20 as an example, the rotation angle θ_ASmell
Radial radius ρ '_AAnd the detection signal is sent to the counter circuit 11
Count at 00 and input the information to the arithmetic and control circuit 1500
Let it. Further, the encoder 334 is used for a roughly ground lens.
Front edge position, that is, rotation angle θ in FIG._AIn
The fZa value is detected and counted by the counter 1100. this
The information is input to the arithmetic control circuit 1500. Similarly en
The coder 338 is located at the rear edge position of the rough ground lens, for example,
Turning angle θ_ACircuit 1100 detects bZa at
And the result is input to the arithmetic and control circuit. to this
Accordingly, the arithmetic control circuit 1500 has the respective radial angles θn (n =
Front edge position information fZn (n) for each of 0, 1, 2,.
= 0, 1, 2,... N), rear edge position information bZn (n
= 0, 1, 2,... N) and the radial value ρ′n (n = 0,
1, 2,... N) are inputted, and the above-mentioned equations (8) to
The front curve C of the roughly ground lens according to the equation (12)
f, rear surface curve Cb, edge thickness Δn (n = 0, 1, 2,...)
n) is calculated. Step 3-4: Motor driving device 120
0 to operate the motor 1208 to rotate the lens
Is returned to the reference position. (4)Curve bevel position input step Step 4-1: Automatically display the bevel shape output display result
Calculation, or act according to user input.
The keyboard 1401 determines whether to use the calculated result.
To select. Step 4-2: The above-described front surface in the arithmetic control circuit 1500
Calculation of the curve value Cf, the rear surface curve value Cb, and the edge thickness Δn
More ideal bevel curve and bevel position based on fruit
And, based on the calculation result, the maximum edge thickness portion,
Interface 14 with bevel cross-sectional shape of minimum edge thickness
03 is displayed on the screen of the display device 1402 via the display device 03.
Also, bevel curve value at that time, bevel from the front of edge
Necessary data such as the distance to the vertex is displayed numerically at the same time
You. Step 4-3: On the keyboard 1401
From the bevel curve value desired by the user and the edge of the edge
Enter the distance to the top of the bevel, the so-called
You. (manual) Step 4-4: The keyboard input value is
Input to the arithmetic and control circuit via the ace 1403,
Are input based on the curve values Cf, Cb, and the edge thickness Δn.
Maximum and minimum edge thickness in bevel curve value and offset amount
Calculates the bevel cross-sectional shape of the
The image and the numerical value are displayed on the display unit 1402 via the. (5)Beveling step Step 5-1: Bevel shape by the above fourth step
Is confirmed, and if the user gives an OK, the keyboard 1
Activate the beveling start button on 401,
The operation control circuit 1500 is controlled by the command so that the motor driving device 12
00 causes the grinding wheel motor 6 to rotate. At the same time
Gen information memory 1600 contains the final determined bevel car
The bevel information such as the unit value and the offset amount is the radial value (ρ'n, θn)
Is stored in relation to 2 Step 5-2: Via Motor Drive 1200
By rotating the carriage feed motor 40, the carriage
Move the rough-ground lens
You. Step 5-3: By motor drive
Rotate the contact stop moving motor 42 and lower the contact stop 27
To lower the carriage 13 supported by it.
The lens into contact with the beveled grindstone and start beveling
I do. The arithmetic and control circuit 1500 includes the bevel information memory 1
For each radial value (ρ'n, θn) stored in 600
The carriage feed mode based on the bevel position and
Controller 40 and the contact stop moving motor 42, and
Check the value measured by the encoder 610 from the path 1100.
Beveling until the desired radial value ρ'n is obtained.
You. This operation is performed for all radial angles θn. Step 5-4: Desired for all radial angles θn
After processing to the radial value ρ'n, hit the carriage 13
The motor 42 to rotate and return to the home position.
At the same time, the rotation of the grinding wheel motor 6 is stopped to stop the grinding wheel. (6)Lens shape re-measurement step Step 6-1: The above steps 3-1 to steps
3-4 is performed, and the radial value (ρ ″) of the beveled lens is performed.
n, θn) are measured. Step 6-2: The measured value (ρ ″ n,
θn) (n = 0, 1, 2,... n) and the frame shape memory 130
0, the radial value information of the lens frame (ρn, θ
n) (n = 0, 1, 2,... n) by the arithmetic control circuit
And if they match, the completion of processing is indicated on the display 1402.
Is displayed, and the carriage 13 is returned to the initial position.
If they do not match, return to step 5-2 again.
Redo beveling. [0051] As described above, the lens frame shape of the present invention
The measuring device raises and lowers the upper and lower rims of the lens frame of the eyeglass frame.
A pair of contact members that contact from the
Press the approximate center of the upper and lower rims
Holding means for holding and the shape of the bevel groove of the lens frame
Measuring means having a feeler for measuring
Moving means for enabling relative movement between the step and the measuring means;
The upper and lower rims held and held by the holding means.
The feeler is placed on a plane that passes through the central bevel groove
It is characterized by being constituted so that. Therefore, various
In the vertical direction and the thickness direction of the rim
Holding the proper position may cause deformation of the lens frame
Positioned lens that allows to hold without
The feeler is automatically placed on a plane passing through the bevel groove of the frame
To efficiently and efficiently measure the shape of the lens frame
It has the effect that it can be performed accurately.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of a lens grinding device according to the present invention, FIG. 2 is an exploded perspective view showing a lens frame measuring device, and FIG. 3 is a perspective view of a lens frame positioning device, FIG. 4 is a front view thereof, FIG. 5 is a side view partially showing a structure of a detector for measuring a lens frame, and FIG. FIG. 6 is a perspective view of a template measuring device, FIG. 7 is a schematic diagram showing a lens frame measuring operation, FIG. 8 is a schematic diagram showing a lens frame measuring operation, FIG. 10 is a schematic diagram showing a lens frame measuring operation, FIG. 10 is a schematic diagram showing a template measuring operation, FIG. 11 is a schematic diagram showing a lens grinding step, FIG. 12 is a lens measuring process 13 is a plan view of the apparatus, FIG. 13 is a plan view of the apparatus, FIG. 14 is a cross-sectional view of the apparatus, and FIG. 16 is a sectional view taken along the line XIII-XIII in FIG. 13, FIG. 17 is a schematic view showing a process of measuring a lens shape after grinding, and FIG. FIG. 19 is a plan view showing a process of lens measurement, FIG. 20 is a schematic diagram showing geometric values of a lens shape, and FIG. 21 is a diagram showing an arithmetic processing circuit. FIG. 22 is a flowchart of all the steps. [Description of Signs] LE lens 3 grinding wheel 30 lens measuring device 51 detection arm 54 detector 100 eyeglass frame holder 200 lens frame 210 template

────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Yoshiyuki Hatano 75-1, Hasunumacho, Itabashi-ku, Tokyo Topcon Corporation (72) Inventor Hiroaki Ogushi 75-1, Hasunumacho, Itabashi-ku Tokyo, Japan 56) References JP-A-52-143595 (JP, A) JP-A-57-105718 (JP, A) JP-A-42-957 (JP, Y1) (58) Fields investigated (Int. Cl. ⁶ , (DB name) B24B 9/14

Claims (1)

(57) [Claims] A pair of contact members that contact the upper and lower rims of the lens frame of the spectacle frame from above and below, holding means that presses and holds a substantially central portion of the upper and lower rims contacted by the contact members from the thickness direction, Measuring means provided with a feeler for measuring the shape of the bevel groove of the frame, and moving means for relatively moving the holding means and the measuring means, and the upper and lower rims held and held by the holding means. A lens frame shape measuring device, wherein the feeler is arranged on a plane passing through a central bevel groove.