JP4185010B2 - Demonstration rimless lens hole detector and ball grinder - Google Patents

Description

The present invention, a lens stop drilling drilling for rimless lens apparatus and the rimless lenses, Tamasuri machine and using the same, demonstration rimless lens for use in eyeglasses for shape measuring apparatus used in this lens edging machine regarding the hole detecting device demonstration rimless lens position detect the hole.

  Conventionally, a lens blind hole that can be opened in a rimless lens is formed by superimposing a mold plate provided with a lens blind hole and a ground rimless lens on the refractive surface of the rimless lens corresponding to the lens blind hole. After that, a skilled eyeglass engineer cuts the position marked on the rimless lens with a drill and opens it in a direction perpendicular to the refractive surface.

  However, the position of the rimless lens is marked by superimposing the ground rimless lens and the ground rimless lens to mark the position of the refractive surface of the rimless lens corresponding to the lens hole. It is difficult to cut a hole with a drill, and it is possible to take an image of the lens hole of a template with a lens hole and send information about the shape of the hole to the hole punching device. Never before.

The present invention has been made in view of the above problems, and its object is to provide a hole detection device demonstration rimless lenses that detect the position of the hole provided in the end portion and its periphery of the demonstration rimless lens There is.

In order to achieve the above object, the invention of claim 1 includes a lens holder for holding a demonstration rimless lens,
An area sensor for detecting the end of the demonstration rimless lens held by the lens holder and the periphery of the hole provided in the demonstration rimless lens, and the demonstration rimless from the amount of light received by each light receiving element of the area sensor. And a position detecting means for detecting the position of the hole provided in the lens and the shape of the hole.

According to the present invention, the position and shape of the hole provided in the demonstration rimless lens can be detected.

  Embodiments of the hole detecting apparatus according to the present invention will be described below with reference to the drawings.

  In FIG. 1, 1 is a box-shaped main body of a ball grinder, 2 is an inclined surface provided on the upper front side of the main body 1, 3 is a liquid crystal display unit provided on the left half of the inclined surface 2, and 4 is an inclined surface 2 Keyboard parts 4a to 4c and the like provided on the right side are switches provided on the keyboard part 4.

  Further, concave portions 1a and 1b are provided in the center and the vicinity of the left side portion of the main body 1, and a grindstone (lens processing blade) 5 held rotatably in the main body 1 is disposed in the concave portion 1a. Yes. The grindstone 5 includes a rough grindstone 6 and a V-groove grindstone 7 and is driven to rotate without being shown.

A mounting plate portion (not shown) is provided in the main body 1, and brackets 10 and 11 for mounting the shaft are projected on both sides of the mounting plate portion as shown in FIG. A shaft support protrusion 12 is projected from the portion. Both ends of a support shaft 14 that penetrates the shaft support protrusion 12 are fixed to the brackets 10 and 11.
<Carriage>
A carriage 15 is disposed on the main body 1. As shown in FIG. 2, the carriage 15 includes a carriage main body 15a, arm portions 15b and 15c which are integrally provided on both sides of the carriage main body 15a and parallel to each other, and a rear side on both sides of the carriage main body 15a. It has protrusions 15d and 15e protruding toward the surface.

  The protrusions 15d and 15e are arranged at positions sandwiching the shaft support protrusion 12, and are rotatable about the axis of the support shaft 14 and movable in the longitudinal direction (left and right) of the support shaft 14. Is held in. As a result, the front end portion of the carriage 15 can be turned up and down around the support shaft 14.

  A lens rotation shaft 16 is rotatably held on the arm portion 15b of the carriage 15, and a lens rotation shaft 17 disposed coaxially with the lens rotation shaft 16 is rotatable on the arm portion 15c of the carriage 15. The lens L is held so as to be movable back and forth with respect to the rotating shaft 16, and the lens L to be processed is sandwiched between opposing ends (between one end portions) of the lens rotating shafts 16 and 17. A disk T is detachably attached to the other end of the lens rotating shaft 16 by a fixing means (not shown). A well-known structure is used for the fixing means.

  The lens rotation shaft 17 is rotationally driven by a pulse motor 137 (see FIG. 25) provided in the carriage 15, and the lens rotation shaft 16 also rotates together with the lens rotation shaft 17.

  The support shaft 14 holds the rear portion of the support arm 26 disposed in the recess 1 a of the main body 1 so as to be movable left and right. The support arm 26 is held so as to be rotatable relative to the carriage 15 and integrally movable in the left-right direction. An intermediate portion of the support arm 26 is held on the main body 1 so as to be movable left and right by a shaft (not shown).

A spring 27 wound around the support shaft 14 is interposed between the support arm 26 and the bracket 10, and a spring 28 is interposed between the main body 1 and the bracket 11. The carriage 15 stops at a position where the spring forces of the springs 27 and 28 are balanced, and the lens L to be processed held between the lens rotating shafts 16 and 17 is positioned on the rough grindstone 6 at this stop position. ing.
<Drilling device>
A pedestal 21 that can move up and down is provided in the recess 1 b of the main body 1, and a piercing device 50 that opens a lens stop hole LH of the rimless lens L is provided in the pedestal 21. The drill 51 of the drilling device 50 can be moved back and forth. The drilling device 50 can be rotated about the vertical axis 50a, and can also move in the direction of arrow A (front-rear direction) with respect to the base 21. It has become. The drill 51 is rotated by a motor 52.

The pedestal 21 is moved up and down by a pulse motor 1101 (see FIG. 26), and the punching device 50 is rotated and moved in the A direction by pulse motors 1102 and 1103. The pulse motor 1102 functions as an angle adjusting unit that adjusts the angle in the punching direction.
<Inclination angle measuring device>
A tilt angle measuring device (tilt angle measuring means) 130 for measuring the tilt angle of the refracting surface of the rimless lens is built in the carriage body 15a.

  As shown in FIG. 25, the tilt angle measuring device 130 includes a pulse motor 132, a support base 131 that approaches and moves away from the rimless lens L by driving the pulse motor 132, and a support base 131 that is disposed on the support base 131. Fillers 133 and 134 brought into contact with the front refracting surface Lf and the rear refracting surface Lb; encoders 135 and 136 mounted on the support base 131 so that the amount of movement of the fillers 133 and 134 can be detected; , Memory 102, m1, etc.

  The fillers 133 and 134 are measured by advancing from an opening 15K provided on the front surface of the carriage body 15a as indicated by a chain line in FIG. The opening 15K is normally closed by a shutter 15S, and the shutter 15S is slid rightward (in FIG. 1) during measurement to open the opening 15K.

  A radial angle θi from the memory 102 is input to the pulse motor 137 that rotates the rimless lens L. The pulse motor 137 controls the rotation of the lens rotation shafts 16 and 17 based on this input, and rotates the lens rotation shafts 16 and 17 and the rimless lens L by the moving radius angle θi.

  On the other hand, the radial length ρ i is input from the memory 102 to the pulse motor 132. The pulse motor 132 drives the support base 131 based on this input to position the fillers 133 and 134 at the position of the moving radius length ρi.

Detection amounts fZi and bZi of the encoders 135 and 136 are input to the arithmetic unit 105. The arithmetic unit 105 obtains the inclination angle and the thickness of the front refractive surface Lf and the rear refractive surface Lb of the rimless lens L from the radial angle θi, the radial length ρi, and the detected amounts fZi, bZi, and the rimless lens L from these. Find the shape. The tilt angle data and shape data obtained by the arithmetic unit 105 are stored in the memory m1.
<Shape measuring device for glasses>
Further, a shape measuring device 60 for glasses is built in the ball grinder main body 1.

  FIG. 20 shows a shape measuring apparatus 60 for glasses.

  The shape measuring device 60 is roughly divided into three parts, that is, a frame holding device 100 for holding a frame, a lens holding device (lens holding means) 900 for holding a lens, and the frame holding device 100 or the lens holding device 900. And a supporting device part 200A for controlling the movement of the holding device into the measurement surface and the movement within the measurement surface, and a measurement for digitally measuring the lens frame of the eyeglass frame or the shape of the lens Part 300. Since the frame holding device 100 has the same structure as that disclosed in Japanese Patent Application Laid-Open No. 61-27459, the same reference numeral as that described in this publication is attached, Detailed description is omitted.

  200 A of support apparatus parts have the housing | casing 201 as a main body. The housing 201 has feet 253 and 254, and these feet 253 and 254 are slidably mounted on rails 251 and 252 attached to the ball grinder main body 1.

  The door 1D of the ball grinder main body 1 is provided with rails 255 and 256, and is configured to be positioned on an extension line of the rails 251 and 252 when the door 1D is opened. With this configuration, the operator can slide the housing 201 out of the housing of the lens grinding apparatus as necessary.

  The housing 201 also has guide rails 202a and 202b installed in parallel to the longitudinal direction (X-axis direction of the measurement coordinate system) on the housing 201, and the stage 203 is slidably mounted on the guide rail. Has been. A female screw 204 is formed on the lower surface of the moving stage 203, and an X-axis feed screw 205 is screwed to the female screw 204. The X-axis feed screw 205 is rotated by an X-axis motor 206 formed of a pulse motor.

  A guide shaft 208 is passed between both side flanges 207a and 207b of the moving stage 203 in parallel with the Y-axis direction of the measurement coordinate system so that the guide shaft 208 can be rotated by a guide shaft motor 209 attached to the flange 207a. It is configured. The guide shaft 208 has a single guide groove 210 formed on the outer surface thereof in parallel with the shaft. Hands 211 and 212 as holder holding portions are slidably supported on the guide shaft 208. Protrusions 213a and 214a are formed in the shaft holes 213 and 214 of the hands 211 and 212, respectively, and the protrusions 213a and 214a are engaged in the guide grooves 210 of the guide shaft 208 described above, so The rotation of 212 around the guide shaft 208 is prevented.

  The hand 211 has two inclined surfaces 215 and 216 that intersect with each other, and the hand 211 also has two inclined surfaces 217 and 218 that also intersect with each other. The ridgeline 220 formed by both slopes 217 and 218 of the hand 212 is parallel to the ridgeline 219 formed by the slopes 215 and 216 of the hand 211 and is located in the same plane, and the angle between the slopes 217 and 218 and the slope 215 The angles formed by 216 are configured to be equal. A spring 230 is stretched between the hands 211 and 212 as shown in FIG. In addition, notches 215a and 217a are formed on the slopes 215 and 217, respectively.

  An arm 241 having a contact ring 242 at one end is attached to the hand 212 so as to be rotatable around the other end. The arm 241 is always in contact with the microswitch 244 by a spring 243. These contact wheel 242, arm 241, spring 243, and micro switch 244 constitute a frame left / right eye determination device 240. In addition, a sensor 245 such as a micro switch for detecting the lens holding device 900 is attached to the hand 212.

  An encoder 700 is attached to the hand 212, and the encoder 700 generates a pulse each time the hand 212 moves along the guide 208 in the left-right direction by a predetermined distance. This pulse is counted by a counter, and the moving distance of the hand 212 is obtained from the count number.

  When the hand 212 moves to the leftmost position (initial position) where the motor 224 is located, the micro switch 701 detects this and resets the counter.

  A pulley 222 is rotatably supported at one end of the rear flange 221 of the moving stage 203, and a Y-axis motor 224 including a pulse motor having a pulley 223 is attached to the other end of the rear flange 221. Both ends of a mini cheer belt 226 with springs 225 interposed between the pulleys 223 and 224 are fixed to pins 227 planted on the upper surface of the hand 211. On the other hand, a hook 228 is formed on the upper surface of the hand 212, and the hook 228 is configured to come into contact with the side surface of the pin 229 implanted in the rear flange 221 of the moving stage 203 by the movement of the hand 212. ing.

  The measuring unit (shape measuring means) 300 includes a sensor arm rotation motor 301 composed of a pulse motor attached to the lower surface of the housing 201 and a sensor arm portion 302 pivotally supported on the upper surface of the housing 201. A belt 305 is stretched between a pulley 303 attached to the rotation shaft of the motor 301 and the rotation shaft 304 of the sensor arm unit, whereby the rotation of the motor 301 is transmitted to the sensor arm unit 302.

  The sensor arm 302 has two rails 311, 311 passed over the base 310, and a slider 350 of the sensor head unit 312 is slidably mounted on the rails 311, 311. A magnetic scale read head 313 is attached to one side surface of the slider 350 of 312. The magnetic scale reading head 313 reads the magnetic scale 314 attached to the base 310 in parallel with the rail 311 and detects the amount of movement of the sensor head unit 312. Further, one end of a constant torque spring 316 of a spring device 315 that always pulls the head portion 312 toward the arm end side surface (leftward in FIG. 20) is fixed to the other side of the slider 350 of the sensor head portion 312. The slider 350 is constantly biased toward the spring device 315 by the biasing force of the constant torque spring 316.

  The magnetic scale reading head 313 and the magnetic scale 314 of the sensor head unit 312 constitute movement amount measuring means.

  FIG. 23 shows the configuration of the spring device 315. An electromagnetic magnet 318 is provided in a casing 317 attached to the base 310 of the sensor arm 302, and a slide shaft 319 is configured to be slidable in the axial direction of the shaft hole of the magnet 318. The slide shaft 319 has flanges 320 and 321, and a spring 323 is interposed between the wall of the flange 320 and the casing 317, and the slide shaft 319 is always moved to the left by the spring 323.

  Clutch plates 324 and 325 are pivotally supported at the end portion of the slide shaft 319, and one end of a constant torque spring 316 is fixed to one clutch plate 324. In addition, a spring 326 with a slide shaft 319 inserted is interposed between the clutch plates 324 and 325, and the interval between the clutch plates 324 and 325 is always widened to prevent contact between the constant torque spring 316 and the clutch plate 325. Yes. Further, a washer 327 is attached to the end of the slide shaft 319.

  FIG. 22 shows a configuration of the sensor head unit 312. A shaft hole 351 is formed in one end portion of the slider 350 supported by the rail 311 in the vertical direction, and the sensor shaft 352 is inserted into the shaft hole 351. . A ball bearing 353 held by the sensor shaft 352 is interposed between the sensor shaft 352 and the shaft hole 351, thereby smoothing the rotation of the sensor shaft 352 around the vertical axis and the movement in the vertical axis direction.

  In addition, an arm 355 is attached to the center of the sensor shaft 352, and an abacus bead-shaped bevel filler 356 that is brought into contact with the bevel groove of the lens frame is rotated as a frame filler (frame measuring means) on the arm 355. It is pivotally supported. The circumferential point of the bevel filler 356 is configured to be located on the center line of the vertical sensor shaft 352.

  A pair of cylindrical shafts 360 and 361 are planted and fixed to the other end of the slider 350, and a lens measuring member 362 is disposed on the cylindrical shafts 360 and 361.

  The lens measuring member 362 includes a base 363, mounting shafts 364 and 365 (see FIG. 6A) that protrude from the lower surface of the base 363 and are detachably fitted to the cylindrical shafts 360 and 361, and on the base 362. It has a filler 366 protruding in the center. The filler 366 includes a lens filler 366a having a contact surface with a predetermined curvature radius on the upper stage and a lens filler 366b having a planar contact surface on the lower stage. The filler 366 can be tilted as shown in FIGS. 6B and 6C.

  Further, the housing 201 is provided with an area sensor (position detecting means) 1001 for detecting the position of the lens blind hole LDH provided in the demonstration rimless lens LD (see FIG. 24). The area sensor 1001 is composed of a CCD, and is formed in a line extending in the X direction. A bracket 1002 extending in the X direction is provided at an upper position facing the area sensor 1001, and a plurality of LEDs 1003 are disposed along the X direction on the bracket 1002. Note that the bracket 1002 is held by a column 1004.

  As shown in FIG. 24, the plurality of LEDs 1003 irradiate a parallel light beam toward the area sensor 1001.

  When the demonstration rimless lens LD is disposed between the LED 1003 and the area sensor 1001, the amount of light received by the area sensor 1001 decreases around the end portion LT of the demonstration rimless lens LD and the lens stop hole LDH. . From this, the position of the lens blind hole LDH can be obtained from the amount of light received by each light receiving element of the area sensor 1001.

  When the amount of received light is small, the periphery of the lens hole LDH may be painted with paint or the like. The color of the paint is, for example, red, orange, yellow, green, blue, black, gray.

  Then, the spectacle shape measuring device 60 functions as a hole position input means for inputting the position of the lens blind hole.

  The control device 1100 shown in FIG. 26 is based on the amount of light received by each light receiving element of the area sensor 1001 when the demo rimless lens LD is held in a horizontal state and the shape of the demo rimless lens LD measured by the measuring unit 300. The major and minor diameters of the lens blind hole LDH are obtained, the inclination angle α of the refracting surface of the demonstration rimless lens LD, particularly the front refracting surface, is calculated, and the hands 211 and 212 are determined based on the inclination angle α. Rotation is performed to adjust the inclination of the refracting surface of the demonstration rimless lens LD, and the position of the lens hole LDH when the lens hole LDH is almost vertical is obtained as polar coordinates. The hole position P of the rimless lens L (see FIG. 2) corresponding to is obtained. Further, the control device 1100 opens a lens stop hole LD in a direction orthogonal to the inclination angle β of the refractive surface Lf of the rimless lens L corresponding to the hole position P.

  The above control by the control device 1100 is a case where the inclination angle β of the front refractive surface Lf of the rimless lens L and the inclination angle α of the front refractive surface of the demonstration rimless lens LD coincide with each other. The position of the lens perforation LDH when the hole LDH is in a substantially vertical state is obtained as polar coordinates, the hole position P ′ of the rimless lens L corresponding to the obtained position of the lens perforation LDH is obtained, and the inclination angle difference Δ = Find β-α. Then, the position of the lens stop hole LDH of the demonstration rimless lens LD when the demonstration rimless lens LD is inclined by the angle α + Δ with respect to the horizontal plane H is obtained. The hole position P of the rimless lens L corresponding to this position is obtained, the inclination angle β of the refractive surface Lf at the hole position P and the angle orthogonal to the inclination angle β are obtained, and the hole position P is orthogonal to the inclination angle β. Make a lens hole LH in the direction.

Moreover, in the said Example, although the shape measuring apparatus 60 for glasses is incorporated in the ball grinder main body 1, it is not limited to this, You may make it independent from the ball grinder main body 1. FIG. In this case, the shape data of the demonstration rimless lens LD and template T, and information such as the hole position P of the lens blind hole LDH of the demonstration rimless lens LD are transferred to the ball grinder main body 1 using a communication device such as a telephone line. You may send it.
<Lens holding device>
As shown in FIGS. 5 and 7 to 11, the lens holding device 900 includes a casing-shaped holder main body 902 having flanges 901 and 901 provided on the side portions.

  The holder body 902 is formed with four holes 902A to 902D. Between the holes 902A and 902B, a suction disk holding part 910 is provided as shown in FIGS. The suction disk holding portion 910 is arranged in a jig fitting cylinder portion 911 formed integrally with the holder main body 902, notches 912 and 912 formed in the jig fitting tube portion 911, and notches 912 and 912. A locking claw 913, 913 provided integrally with the holder main body 902, a positioning base 914 integrated with the holder main body 902 provided near the upper part in the jig fitting cylinder 911, and the positioning A positioning ridge 915 provided on the base 914 is provided.

  Further, the suction plate holder 910 selectively holds the template holder 920 shown in FIG. 14 or the lens holder 930 shown in FIG. The suction disk holder 910 and the lens holder 930 constitute a lens holder.

  The template holder 920 shown in FIG. 14 is close to the shaft portion 921, a positioning groove 922 provided at one end of the shaft portion 921, a flange 923 provided at the other end of the shaft portion 921, and the flange 923. And an annular locking groove 924 provided in the intermediate portion of the shaft portion 921. On the flange 923, a female screw cylinder 925 that is coaxial with the shaft portion 921 is integrally formed, and positioning pins 926 and 926 arranged at positions sandwiching the female screw cylinder 925 are integrally formed. . A fixing screw 927 is screwed into the female screw cylinder 925.

  A center hole 928 and pin holes 929 and 929 that engage with the female screw cylinder 925 and the positioning pins 926 and 926 are formed in the template T attached to the template holder 920. Then, the center hole 928 and the pin holes 929 and 929 of the template T are inserted into the female screw cylinder 925 and the positioning pins 926 and 926 of the template holder 920, and the fixing screw 927 is screwed into the female screw cylinder 925. Thus, the template T is fixed to the single plate holder 920 by the fixing screw 927.

  A lens holder 930 shown in FIG. 15 is close to the shaft portion 931, a positioning groove 932 provided at one end of the shaft portion 931, a flange 933 provided at the other end of the shaft portion 931, and the flange 933. And an annular locking groove K provided in an intermediate portion of the shaft portion 931.

  The one-eye lens L is fixed on the flange 933 via a double-sided adhesive tape 934.

  A holding part 960 is provided between the holes 902C and 902D of the holder main body 902 to hold the suction holding part 910a so as to be slidable in the left-right direction. A lens holder 930 is attached to the suction holder 910a in the same manner as described above.

  In the vicinity of the suction holding portion 910a, as shown in FIG. 9, a plate pressing portion 970 for pressing a lens placed on the lens holder 930 is provided. The plate pressing portion 970 has a pressing portion 970a having elasticity.

  980 shown in FIG. 9 is a columnar support portion for positioning the rimless frame F by bringing the nosepiece Fh of the rimless frame F into contact. The support portion 980 has a smaller diameter as it goes downward.

  As shown in FIGS. 11, 16, and 17, the support portion 980 is attached to a base portion 981 that can slide along the slit G1, and is urged in the arrow direction by a spring S1. The support part 980 is inserted between the nose pad Fh of the rimless frame F from a position slightly before the end Ga of the slit G1 (position on the right side of the position of the support part 980 shown in FIG. 11), and by the biasing force of the spring S1. The center position of the rimless frame F is positioned at a preset position by moving the support portion 980 to the end portion Ga of the slit G1.

  The configurations other than those described above are those disclosed in Japanese Patent Application Laid-Open No. 61-274859.

Next, the operation of the lens-lens shape measuring apparatus having such a configuration will be described.
(1) Measurement of lens frame shape of eyeglass frame When measuring the shape of the lens frame (lens frame) 501, the left and right lens frames to be measured in the eyeglass frame, for example, the lens frame 501 are attached to the slider 156 of the frame holding device 100. Hold between 156.

  On the other hand, the housing 201 is pulled out from the housing of the lens grinding apparatus (not shown), the hands 211 and 212 on the housing 201 side are inclined obliquely upward, and the lens measuring member 362 is removed from the slider 350 as shown in FIG. The hands 211, 212 are opened against the spring force of the spring 230, the frame holding device 100 holding the eyeglass frame is disposed between the hands 211, 212, and the frame holding device 100 is moved by the spring force of the spring 230. Then, it is held between the hands 211 and 212.

  Since the sensor 245 is not turned on in this state, a CPU (arithmetic control circuit) (not shown) detects that the lens holding device 900 is not attached between the hands 211 and 212 and the frame holding device 100 is held. To do.

Thereafter, the slider 350 is moved toward the center of the rail 311 against the spring force of the constant torque spring 316 and the hands 211 and 212 are rotated downward until they become horizontal, and then the bevel filler 356 is moved to the constant torque spring 316. As shown in FIGS. 19 and 21, the spring is caused to contact the bevel groove 501a of the lens frame 501 as shown in FIGS. In this state, the base 301 is rotated once by operating the motor 301 and rotating the rotating shaft 304. The amount of movement of the bevel filler 356 at this time is detected by the magnetic scale reading head 313. At this time, the movement amount of the bevel filler 356 is recorded in correspondence with the rotation angle of the base 310, and the shape of the lens frame 501 is calculated by a CPU or the like. As the circuit configuration and calculation method for such calculation, the one disclosed in JP-A-61-274859 is adopted.
(2) Shape measurement of template When measuring the shape of template T, the template T is attached to the template holder 920 as described above, and the shaft portion 931 of the template holder 920 is attached. Is fitted into the jig fitting cylinder portion 911 of the suction cup holding portion 910. At this time, when the positioning groove 922 of the template holder 920 is engaged with the protrusion 914 in the jig fitting tube portion 911, the locking claws 913 and 913 are formed in the locking groove 924 of the template holder 920. The lens holder 930 can be held by the suction disk holder 910 by engaging.

  On the other hand, the housing 201 is pulled out from the ball grinder main body 1 and the hands 211 and 212 on the housing 201 side are inclined obliquely upward, and the distance between the hands 211 and 212 is opened against the spring force of the spring 230. The lens holding device 900 holding the template T is disposed between the hands 211 and 212, and the lens holding device 900 is held between the hands 211 and 212 by the spring force of the spring 230.

  In this state, the sensor 245 is turned on by the holder body 902 of the lens holding device 900, and this ON signal is input to a CPU (arithmetic control circuit) (not shown). This CPU determines from the ON signal of the sensor 245 that the lens holding device 900 is mounted between the hands 211 and 212.

  Thereafter, the slider 350 is moved toward the center of the rail 311 against the spring force of the constant torque spring 316 and the hands 211 and 212 are rotated downward until they become horizontal, and then the lens filler 366 is moved to the constant torque spring 316. 5 and 18 is brought into contact with the peripheral surface of the template T with the spring force of FIG. In this state, by rotating the rotating shaft 304 that operates the motor 301, the base 310 is rotated once, and the movement amount of the lens filler 366 at this time is detected by the magnetic scale reading head 313. At this time, the movement amount of the lens filler 366 is recorded in correspondence with the rotation angle of the base 310, and the shape of the template T is calculated by a CPU or the like. As the circuit configuration and calculation method for such calculation, the one disclosed in Japanese Patent Application Laid-Open No. 61-267732 (Japanese Patent Application No. 60-287491) is adopted.

  When measuring the shape of the lens of the rimless frame glasses, the lens holder 930 as shown in FIG. 15 is used to fit the lens holder 930 to the suction disk holder 910, and the above-described template T Make the same measurement as.

  Next, a case where the rimless lens L is processed will be described.

  First, as shown in FIGS. 1 and 2, the rimless lens L is sandwiched between the lens rotation shafts 16 and 17, and the demonstration rimless lens LD is held in the holder body 902 of the lens holding device 900 as shown in FIG. The lens holder 930 is attached. Then, the hands 211 and 212 are moved to predetermined positions, and the lens hole LDH is positioned on the area sensor 1001 as shown in FIG.

  At this time, when the demonstration rimless lens LD is held horizontally by the hands 211 and 212, as shown in FIG. 27A, the shape of the lens blind hole LDH is projected on an ellipse due to the inclination of the refractive surface LDf. Therefore, the inclination angle α of the refracting surface of the demonstration rimless lens LD, particularly the front refracting surface LDf, can be obtained by measuring the major diameter R1 and the minor diameter R2 of the projection image LT of the lens blind hole LDH. FIG. 27B shows the shape of the projection image LT ′ of the lens blind hole LDH when the refractive surface LDf is held horizontally.

That is, the diameter (major axis) R1 of the lens stop hole LDH is projected as a minor axis R2 on the horizontal plane because the refractive surface LDf is inclined at an inclination angle α with respect to the horizontal plane, and the relationship of FIG. . If you show this using trigonometric functions,
R1 ・ cosα = R2
α = cos ^-1 (R2 / R1)
It becomes. From this equation, the inclination angle α of the refractive surface LDf of the demonstration rimless lens LD can be calculated.

  Based on the inclination angle α obtained here, the hands 211 and 212 are pivoted up and down to adjust the inclination, the refracting surface LDf of the demonstration rimless lens LD is kept substantially horizontal, and the direction of the lens stop hole LDH is adjusted. Is almost vertical. That is, as shown in FIG. 24, the demonstration rimless lens LD is inclined by an angle α with respect to the horizontal H.

  Since the inclination angle α of the refractive surface LDf of the demonstration rimless lens LD is about 5 ° to 15 °, for example, in the demonstration rimless lens LDH having the refractive surface LDf having an inclination angle of 10 °, the hands 211 and 212 are used for demonstration. The rimless lens LD is tilted by 10 °, the refractive surface LDf is substantially horizontal, and the direction of the lens blind hole LDH is substantially vertical.

  Next, the shape of the demonstration rimless lens LD is measured in the same manner as the template T, and the LED 1003 is caused to emit light, and the position of the lens stop hole LDH is obtained from the amount of light received by each light receiving element of the area sensor 1001. The position of the lens blind hole LDH is obtained in polar coordinates based on the shape data of the demonstration rimless lens LD.

  On the other hand, in the ball grinder main body 1, the rimless lens L is ground by the grindstone 5 based on the shape data of the template T. After the grinding process is completed, the tilt angle measuring device 130 advances the fillers 133 and 134 from the opening 15K of the carriage body 15a as shown by the chain line in FIG. The shape of the rimless lens L is obtained by obtaining the inclination angle and thickness of the refracting surface Lb.

  When the refracting surface of the rimless lens L, in particular the tilt angle β of the front refracting surface Lf, and the refracting surface of the demonstration rimless lens LD, in particular the tilt angle α of the front refracting surface, coincide with each other, The hole position P of the rimless lens L corresponding to the position of the lens blind hole LDH of the demonstration rimless lens LD is obtained based on the shape of the rimless lens L obtained by the above. Further, the control device 1100 obtains an inclination angle β (= α) of the refractive surface Lf at the hole position P and an angle orthogonal to the inclination angle β (= α), and further controls the pulse motors 1101 to 1103. The tip of the drill 51 of the drilling device 50 is brought into contact with the hole position P of the rimless lens L, and the direction of the drill 51 is set to a direction orthogonal to the inclination angle α.

  The control device 1100 drives the drill motor 52 to rotate the drill 51 and drives a motor (not shown) to advance the drill 51 to cut the position P of the rimless lens L so as to be orthogonal to the refractive surface Lf. Make a lens hole LH in the direction.

  Incidentally, the inclination angle β of the refracting surface Lf of the rimless lens L and the inclination angle α of the front side refracting surface of the demonstration rimless lens LD often do not coincide. In such a case, the position P of the lens stop hole of the rimless lens L cannot be obtained accurately from the position of the lens stop hole LDH that is formed perpendicular to the front refractive surface LDf of the demonstration rimless lens LD.

  Therefore, the control device 1100 obtains the position of the lens blind hole LDH of the demonstration rimless lens LD in the same manner as described above, and obtains the position P of the rimless lens L from this position. The obtained position P is set as P ′, the inclination angle β of the refracting surface Lf of the rimless lens L at the position P ′ is obtained, and the inclination angle difference Δ = β−α is obtained. Then, in addition to the above-described tilt adjustment of the hands 211 and 212 holding the demonstration rimless lens LD, the hands 211 and 212 are turned and rotated by the tilt angle difference Δ to finely adjust the tilt of the demonstration rimless lens LD. . That is, the demonstration rimless lens LD is inclined with respect to the horizontal plane H by an angle α + Δ.

  Further, the control device 1100 obtains the position PD (not shown) of the lens stop hole LDH of the demonstration rimless lens LD held at the finely adjusted inclination angle α + Δ. The position PD of the lens blind hole LDH is obtained in polar coordinates based on the shape data of the demonstration rimless lens LD as described above.

  Next, based on the shape of the rimless lens L obtained by the tilt angle measuring device 130, the control device 1100 obtains the hole position P of the rimless lens L corresponding to the position PD of the lens stop hole LDH in polar coordinates. Further, the control device 100 obtains the inclination angle β of the refractive surface Lf at the hole position P and the angle orthogonal to the inclination angle β, and further controls the pulse motors 1101 to 1103 to control the tip of the drill 51 of the drilling device 50. The direction of the drill 51 is set to a direction orthogonal to the inclination angle β so that the portion comes into contact with the hole position P of the rimless lens L.

  The control device 1100 drives the drill motor 52 to rotate the drill 51 and drives a motor (not shown) to advance the drill 51 to cut the position P of the rimless lens L so as to be orthogonal to the refractive surface Lf. Make a lens hole LH in the direction.

  Next, in order to measure the position of the other lens hole LDH ′, the hands 211 and 212 are moved and the lens hole LDH ′ is positioned on the area sensor 1001 as described above.

  Since there are two lens perforations LDH and LDH 'for the demonstration rimless lens LD, the positions of the holes are measured four times by combining the left and right lenses, but the left and right lens shapes are subject to the left and right, so for example the left demo rimless Two lens blind holes LDH and LDH ′ of the lens LD may be measured, and the data may be inverted and used as right data.

  Incidentally, the control device 1100 obtains the hole position P of the rimless lens L corresponding to the position of the lens blind hole LDH, and the inclination angle α of the refractive surface Lf of the rimless lens L at the hole position P is orthogonal to the inclination angle α. Since the angle of the drill 51 is determined and the direction of the drill 51 is set to a direction orthogonal to the inclination angle α by controlling the pulse motors 1101 to 1103, the lens stop hole LH can be accurately opened in the direction orthogonal to the refractive surface Lf. Become.

  For this reason, it is not necessary for a skilled eyeglass engineer to rely on intuition to open the lens hole LH in the direction orthogonal to the refractive surface Lf of the rimless lens L as in the prior art. Work efficiency can be improved.

  Further, since the area sensor 1001 for determining the position of the lens blind hole LDH of the demonstration rimless lens LD is provided in the housing 201 of the spectacle shape measuring apparatus 60, a device for determining the position of the lens blind hole LDH is used. There is no need to provide it separately from the sliding machine main body 1, and since the shape measuring unit 300 is used to obtain the position of the lens blind hole LDH, the position of the lens blind hole LDH can be accurately obtained as polar coordinates. Moreover, it can prevent that an apparatus enlarges.

  Next, a case where the distance between the lens geometric centers of the rimless frame and the lens shape are measured will be described.

  First, the monocular lens L of the rimless frame F is removed, and the monocular lens L is attached to the lens holder 930 fitted to the suction disk holding unit 910. On the other hand, the rimless frame F from which the one-eye lens is removed is set as shown in FIGS.

  Then, the holder 901 is mounted between the arms 211 and 212, and as shown in FIGS. 3a and 4a, the lens filler 366a is brought into contact with the peripheral end of the lens L and the lens shape is measured in the same manner as described above. From this measurement data, the width Ha of the one-eye lens L is known.

  Next, the arms 211 and 212 are raised and inclined obliquely upward and moved to an initial position, and a counter (not shown) is reset. Then, the arms 211 and 212 are moved rightward and stopped at the center position. The center position is obtained from the count number of the counter. On the other hand, the slider 350 is moved to the initial position by the constant torque spring 316, and as shown in FIG. 4c, the lens filler 366b is separated from the peripheral end of the lens L (the dimensions are set in advance so as to be in this state). Have been).

  In this state, the arms 211 and 212 are lowered and positioned in a horizontal state. The arms 211 and 212 are further moved rightward, and the distance until the end of the lens L contacts the lens filler 366b is measured by the counter. The distance according to the count value of this counter is H1.

  By the way, the distance from the initial position of the arm 212 to the support member 980 is determined by the count number of the counter, and the position of the rotating shaft 304 is fixed, so that the lens filler 366b in the initial position from the support member 980 is fixed. The distance H2 to the contact surface is known.

  Therefore, a width Hb that is ½ of the rimless frame F can be obtained. That is, it is obtained by H1-H2 = Hb. From these data, the lens geometric center distance FPD is obtained from the following equation.

FPD = 2 × (Hb−Ha / 2)
As described above, when the one-eye lens L and the rimless frame F are set in the lens holding device 900, the lens geometric center distance FPD of the rimless frame F can be obtained. It is not necessary to replace F and reset the lens holding device 900, and to remove the holding device 900 from the arms 211 and 212 and mount it again on the arms 211 and 212. For this reason, the mounting operation is extremely simple.

  In the above-described embodiment, the position of the lens blind hole LDH of the demonstration rimless lens LD is obtained from the amount of light received by each light receiving element of the area sensor 1001. Data may be input by an input device (not shown).

It is the perspective view which showed the external appearance of the ball grinder. FIG. 2 is a plan view showing a schematic configuration of a carriage. (a) is a principal part perspective view of the lens shape measuring apparatus which concerns on this invention. (b) is the perspective view explaining the case where a rimless frame is measured. (a) is explanatory drawing which showed the state which attaches a lens and a rimless frame to a lens holding device, and measures a lens shape. (b) is explanatory drawing which showed the lens width. (c) is explanatory drawing which showed the state which attaches a lens and a rimless frame to a lens holding device, and measures a frame width. A is explanatory drawing which shows the relationship between the lens holding | maintenance apparatus and shape measuring apparatus in the case of measuring a template. B is an explanatory view showing the relationship between the lens holding device and the shape measuring device when measuring the frame width. A is a partial cross-sectional view showing a lens filler mounting structure. B is a side view showing a lens filler. C is a side view showing tilting of the lens filler. It is a perspective view of a lens holding device. FIG. 8 is a plan view of FIG. 7. It is the perspective view which showed the state which attached the lens and the rimless frame to the lens holding device. It is explanatory drawing seen from the back side of the lens holding | maintenance apparatus shown in FIG. It is explanatory drawing of the support part provided in the lens holding device of FIG. It is explanatory drawing which shows the system between the suction disk holding | maintenance part shown in FIG. 8, and a lens holder. It is a perspective view of the suction cup holding | maintenance part shown in FIG. It is a disassembled perspective view which shows the relationship between a template and a template holder. It is a disassembled perspective view which shows the relationship between a lens and a lens holder. It is explanatory drawing which showed the state which attached the lens of the rimless frame to the lens holder. It is the side view which showed the state which attached the lens of the rimless frame to the lens holder. It is explanatory drawing which shows the relationship between a lens and a lens filler. It is explanatory drawing which shows the measurement state by the bevel filler of a lens frame. It is a perspective view of a measuring device which has the composition mentioned above. It is explanatory drawing which shows the measurement state by the bevel filler shown in FIG. It is expansion explanatory drawing of the part of the bevel filler shown in FIG. It is an expanded sectional view of the part of the constant torque spring shown in FIG. It is explanatory drawing which showed the relationship between an area sensor and the output of an area sensor. It is explanatory drawing which showed the structure of the inclination-angle measuring apparatus provided in the ball grinder of FIG. It is the block diagram which showed the structure of the control system provided in the ball grinder of FIG. (A) It is explanatory drawing which showed the projection image of the lens blind hole in case a refracting surface is inclined. (B) It is explanatory drawing which showed the projection image of the lens blind hole at the time of hold | maintaining a refractive surface horizontally. (C) It is explanatory drawing which showed the relationship between the long diameter and short diameter of a projection image.

Explanation of symbols

    1001 Area sensor (position detection means)

Claims (5)

A lens holder for holding the demo rimless lens;
An area sensor for detecting the end of the demonstration rimless lens held by the lens holder and the periphery of the hole provided in the demonstration rimless lens, and the demonstration rimless from the amount of light received by each light receiving element of the area sensor. A hole detection apparatus for a demonstration rimless lens, comprising: a position of a hole provided in the lens and a position detection means for detecting the shape of the hole.   2. The demonstration rimless according to claim 1, further comprising a control device that determines an inclination angle of a refractive surface of the demonstration rimless lens provided with the hole based on the shape of the hole detected by the position detection unit. Lens hole detection device. It has a shape measuring means to measure the shape of the demo rimless lens,
The position detecting means detects the position of the hole of the demo rimless lens and the shape of the hole based on the shape of the demo rimless lens measured by the shape measuring means and the amount of light received by each light receiving element of the area sensor. The rimless lens hole detection device for demonstration according to claim 1 or 2, wherein: In the hole detection apparatus of the demonstration rimless lens according to any one of claims 1 to 3,
A demonstration rimless lens hole detection apparatus comprising a transmission means for sending information such as a hole position of a demonstration rimless lens to a drilling device or a ball grinder. A lens rotation shaft for holding the rimless lens, an inclination angle measuring means for measuring the shape of the rimless lens held by the lens rotation shaft, and a punching device for making a hole in the rimless lens held by the lens rotation shaft. A ball grinder equipped with,
A hole detection device according to claim 3 is provided,
A ball grinder characterized in that a hole is made by the punching device at a position of the rimless lens corresponding to the hole of the demonstration rimless lens detected by the hole detection device.

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