JP2005238378A - Method for processing spectacle lens - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for processing a spectacle lens by which even a beginner simply processes an unprocessed spectacle lens into a ball-type shape by using measured data after easily measuring the peripheral edge shape of a lens for demonstration mounted to a rimless frame and also can simply drill a metal fitting mounting hole to the machined spectacle lens. <P>SOLUTION: The method for processing a spectacle lens is constituted as follows. The peripheral edge shape of the lens for demonstration (the ball type 112) of the rimless frame is measured. A block center (the center of a lens suction jig 415, a processing center) is coincided with the measurement center O. The spectacle lens is processed at the center aligned with the measurement center O. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention measures the peripheral shape of the demonstration lens attached to the rimless frame, processes the raw spectacle lens into a target lens shape using the measurement data, and opens the fitting attachment hole in the spectacle lens. The present invention relates to a processing method for a spectacle lens.

  The rimless frame glasses are of a type in which left and right eyeglass lenses are connected by a nose side bridge fitting, a temple attachment fitting is attached to the ear side of the eyeglass lens, and a temple is attached to the temple attachment fitting.

  The rimless frame is composed of a bridge fitting, a temple fitting, a temple, and the like, and is a glasses frame generally referred to as a two-point frame because the fitting is attached to two portions on the nose side and the ear side of the eyeglass lens. .

  When a sample of such rimless frame glasses is displayed at a spectacle store or the like, a dummy lens (a demo lens having no refractive index) is used as a spectacle lens to which the rimless frame is attached.

  When mounting a bracket or temple mounting bracket to the eyeglass lens, the dummy lens is drilled to form a bracket mounting hole, and the bracket is fixed to the dummy lens with a fixing screw inserted into the bracket mounting hole. Like to do.

  By the way, when making glasses of an actual rimless frame, first, glasses of a rimless frame to which a dummy lens is attached are selected at a spectacle store or the like. Next, the lens peripheral shape is measured from a dummy lens of the selected glasses with a dedicated lens shape measuring device or the like to obtain the lens shape information (θi, ρi), and the position and size of the bracket mounting hole are determined. The operator measures.

Then, based on the lens shape information (θi, ρi) measured in this way, an actual unprocessed spectacle lens is processed into a lens shape of a dummy lens, and the spectacle lens processed into the target lens shape is described above. The eyeglass lens in which the dummy lens, the target lens shape, and the metal fitting mounting hole coincide with each other is formed by opening the metal fitting mounting hole (see, for example, Patent Documents 1 to 9).
Republished patent WO99 / 37449 Registered Utility Model Registration No. 3010820 JP-A-9-38955 JP-A-6-347725 JP 2001-121330 A JP-A-11-104997 JP-A-8-155806 JP-A-8-155945 Japanese Patent Application No. 2002-275279

  However, it has been very difficult to reproduce the position of the metal fitting mounting hole in the spectacle lens so that the dummy lens and the spectacle lens after processing are accurately matched.

  In particular, in order to match the dummy lens and the processed spectacle lens, the outer diameter shape (peripheral shape) is used as a reference. However, when the dummy lens and the processed spectacle lens are nearly circular, it is difficult to accurately match the dummy lens and the processed spectacle lens in the circumferential direction.

  Moreover, in the target lens shape, for example, a lens having a narrow vertical width such as a crab lens or a lens curved so as to follow the face of a spectacle wearer. As described above, since the target lens shape is not constant, it is difficult to obtain a reference for confirming the match between the target lens shape of the dummy lens and the processed spectacle lens.

  In addition, as a device for forming a bracket mounting hole in a spectacle lens, a jig body, a large number of lens periphery fixing means arranged in an annular shape and attached to the jig body, and movable in the horizontal direction to the jig body There is known a perforating apparatus provided with a pair of centering tube holding means held at intervals and a pair of centering tubes held on each centering tube holding means so as to be tiltable in an arbitrary direction ( For example, see Patent Document 3).

  In this eyeglass lens punching device, the periphery of the dummy lens is fixed by a number of lens periphery fixing means, and the upper ends of the pair of centering tubes are respectively aligned with the bracket mounting holes on the nose side and the ear side of the dummy lens from below, By engaging a pair of centering rods disposed above the dummy lens with the pair of centering cylinders from the nose side and ear side metal mounting holes, the centering cylinder is inclined, A location is identified. In this state, by fixing the centering tube, the position of the metal fitting mounting hole and the drilling angle are memorized mechanically.

  However, in such a spectacle lens punching device, a large number of lens peripheral edge fixing means for fixing the peripheral edge of the spectacle lens are used, and the position and the punching angle of the bracket mounting hole are determined using a pair of centering tubes. Since the configuration is mechanically stored, the configuration becomes large and the work is complicated, so that it is not easy for beginners to handle.

  Therefore, the present invention allows a beginner to easily measure the peripheral shape of a demonstration lens attached to a rimless frame, and easily process an unprocessed spectacle lens into a target lens shape using the measurement data. It is an object of the present invention to provide a processing method of a spectacle lens that can easily open a metal fitting mounting hole in the processed spectacle lens.

  In order to achieve this object, the present invention is a spectacle lens that measures the peripheral shape of a demonstration lens of a rimless frame, matches the block center with the measurement center, and processes the spectacle lens at the center that matches the measurement center. It is characterized by the processing method.

  According to this configuration, even a beginner can easily measure a peripheral shape of a demonstration lens attached to a rimless frame and easily process an unprocessed spectacle lens into a target lens shape using the measurement data. It is possible to easily open the bracket mounting hole on the spectacle lens.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[Constitution]
In FIG. 1, 1 is a lens grinding device (ball grinder) that grinds an unprocessed circular spectacle lens into a lens shape, and 2 is a lens frame shape of the spectacle frame F, its template, or a lens model, etc. This is a lens shape data measuring device that reads lens shape information (θi, ρi) and point frame mounting hole position data, which are mold shape data (lens shape information).

  The lens grinding apparatus 1 then grinds an unprocessed circular spectacle lens into a lens shape based on the lens shape information (θi, ρi) transmitted from the target lens shape measuring apparatus 2 and measures the target lens shape. An attachment hole for attaching a point frame is formed in a spectacle lens ground into a lens shape based on point frame attachment hole position data transmitted from the device 2.

  The point frame mounting hole position data is a non-contact type or a contact type by means of an area sensor or a mounting hole (hole) position measuring member described in JP-A-8-15594 or JP-A-2001-166269. It is obtained by any one of the measurement methods. By providing this configuration in the target lens shape measuring apparatus 1, the point frame mounting hole position data can be read from the template or target model.

  The measured point frame mounting hole position data is lens shape information (θi, which is the lens shape data of the target lens model (lens demo lens with a point frame mounting hole), as will be described later. and stored in the data memory 82 together with ρi).

Reference numeral 400 denotes a pivoting device for attaching a lens suction jig to an unprocessed circular spectacle lens based on lens shape information (θi, ρi) measured by the target lens shape measuring device 2.
(A) Lens grinding apparatus 1
The lens grinding apparatus 1 has an apparatus main body (main body case) 3. As shown in FIG. 1, an upper surface (inclined surface) 3 a that inclines upward from the near side to the rear side is provided on the upper portion of the apparatus body 3, and the front side (lower side) of the upper surface 3 a is provided. Is formed in the processing chamber 4.

  The processing chamber 4 is opened and closed by a cover 5 attached to the apparatus body 3 so as to be slidable obliquely up and down. The cover 5 is made of a single glass or resin panel that is colorless and transparent or colored and transparent (for example, colored and transparent such as gray), and slides forward and backward of the apparatus body 3.

An operation panel 6 positioned on the side of the processing chamber 4 and an L-shaped operation panel 7 positioned on the rear side of the upper opening of the processing chamber 4 are provided on the upper surface 3 a of the apparatus body 3. Yes. In addition, a liquid crystal display (display device) 8 is provided on the upper surface 3a as a display unit that is positioned behind the lower portion of the L-shaped operation panel 7 and that displays the operation state of the operation panels 6 and 7. It has been.
(Operation panel 6)
As shown in FIG. 2A, the operation panel 6 includes a “clamp” switch 6a for clamping the spectacle lens by a pair of lens rotation shafts (lens holding shafts) 23 and 24, which will be described later, and the right side of the spectacle lens. “Left” switch 6b, “right” switch 6c for specifying the processing for the eye and the left eye, display switching, etc., “grinding wheel movement” switches 6d, 6e for moving the grinding wheel in the left-right direction, and the spectacle lens A “refinish / trial” switch 6f for refinishing or trial sliding when finishing is insufficient or trial sliding, a “lens rotation” switch 6g for lens rotation mode, and a stop mode And a “stop” switch 6h. This is to reduce the burden on the operator's operation by arranging a switch group necessary for actual lens processing at a position close to the processing chamber 4.
(Operation panel 7)
As shown in FIG. 2B, the operation panel 7 includes a “screen” switch 7a for switching the display state of the liquid crystal display 8, and a “memory” switch for storing settings relating to processing displayed on the liquid crystal display 8. 7b, a “data request” switch 7c for capturing lens shape information (θi, ρi), and a seesaw type “− +” switch 7d (“−” switch and “+” switch used for numerical correction) And a “別 々” switch 7e for moving the cursor-type pointer is arranged on the side of the liquid crystal display 8. In addition, function keys F1 to F6 are arranged below the liquid crystal display 8.

  The function keys F1 to F6 are used for setting for processing of the eyeglass lens ML, and for responding to and selecting messages displayed on the liquid crystal display 8 in the processing process.

  The function keys F1 to F6 are set for processing (layout screen). The function key F1 is used for inputting the lens type, the function key F2 is used for inputting the processing course, the function key F3 is used for inputting the lens material, and the function key F4 is used. The frame type input, function key F5 is used for chamfering type input, and function key F6 is used for mirror finishing input.

  The lens types input with the function key F1 include “single focus”, “ophthalmic prescription”, “progressive”, “bifocal”, “cataract”, “plum”, and the like. In the spectacles industry, “cataract” generally means a positive lens having a large refractive power, and “bottle” means a negative lens having a large refractive power.

  Processing courses input with the function key F2 include “auto”, “trial”, “monitor”, “frame change”, and the like.

  The material of the lens to be processed that is input with the function key F3 includes “plastic”, “high index”, “glass”, “polycarbonate”, “acrylic”, and the like.

  The types of eyeglass frames F that can be input with the function key F4 are “metal”, “cell”, “optil”, “flat”, “groove (thin)”, “groove (medium)”, “groove”. (Thick) ”,“ point: front bracket ”,“ point: rear bracket ”,“ point: composite bracket ”, etc.

  Each “grooving” indicates a bevel groove which is a kind of beveling. In the case of “point: front bracket”, the eyeglass lens is punched from the front refractive surface side, and in the case of “point: rear bracket”, the eyeglass lens is punched from the rear refractive surface side. Applied. In addition, in the case of “Point: Composite Bracket”, in order to attach the point frame to the nose pad side and the ear hook side of the spectacle lens, a hole is formed in the spectacle lens from the front refractive surface side to one of the nose pad side and the ear hook side. Opening is performed, and the eyeglass lens is perforated from the rear refractive surface side to the other of the nose pad side and the ear hook side. As described above, the direction in which the eyeglass lens is perforated varies depending on the type of the point frame.

  The “front fitting” means a front fitting mounting type point frame Pf1 attached to the front refractive surface rf of the spectacle lens ML, and the “rear fitting” means a rear fitting attached to the rear refractive surface rb of the spectacle lens. This means the attachment type point frame Pf2. The point frames Pf1 and Pf2 include a bridge metal fitting Ba attached to the nose pad side of the spectacle lens ML and an ear hook side metal fitting E for rotatably attaching a temple (not shown) on the ear hook side.

  In addition, the composite metal fitting means “when attaching the rear metal fitting type point frame Pf1 on the nose pad side and attaching the front metal fitting type point frame Pf2 on the ear hook side” and “mounting the front metal fitting on the nose pad side”. There is a case of attaching a point frame of the rear bracket mounting type to the ear hook side while attaching a type point frame.

  Types of chamfering processing input with the function key F5 include “None”, “Small”, “Medium”, “Large”, “Special” and the like.

  Examples of the mirror finishing input with the function key F6 include “none”, “present”, “mirror chamfering”, and the like.

  The mode, type, or order of the function keys F1 to F6 described above is not particularly limited. In addition, as the selection of each tab TB1 to TB4 to be described later, the number of keys is not limited, such as providing function keys for selecting “layout”, “processing”, “processed”, “menu”, etc. Absent.

(Liquid crystal display 8)
The liquid crystal display 8 is switched by a “layout” tab TB1, a “processing” tab TB2, a “processed” tab TB3, and a “menu” tab TB4, and below the function display section H1 corresponding to the function keys F1 to F6. ~ H6. Note that the colors of the tabs TB1 to TB4 are independent, and the background background except for the areas E1 to E4, which will be described later, is the same background color as the tabs TB1 to TB4 simultaneously with the selection switching of the tabs TB1 to TB4. Switch.

  For example, the “display” tab TB1 and the entire display screen (background) with the tab TB1 are blue, the “processing” tab TB2 and the entire display screen (background) with the tab TB2 are green, The tab TB3 and the entire display screen (background) with the tab TB3 are displayed in red, and the menu screen TB4 and the entire display screen (background) with the tab TB4 are displayed in yellow.

  As described above, the tabs TB1 to TB4 color-coded for each work and the surrounding background are displayed in the same color, so that the worker can easily recognize or confirm which work is currently being performed.

  The function display sections H1 to H6 are appropriately displayed as necessary, and when they are in the non-display state, display different symbols, numerical values, or states from those corresponding to the functions of the function keys F1 to F6. Can do. Further, when the function keys F1 to F6 are operated, for example, when the function key F1 is operated, the display of the mode or the like may be switched every time the function key F1 is clicked. For example, a list of each mode corresponding to the function key F1 can be displayed (pop-up display) to improve the selection operation. The list displayed in the pop-up display is represented by characters, figures, icons, or the like.

  When the “Layout” tab TB1, the “Processing” tab TB2, and the “Processed” tab TB3 are selected, they are divided into an icon display area E1, a message display area E2, a numerical value display area E3, and a status display area E4. Is displayed. When the “menu” tab TB4 is selected, it is displayed as one menu display area as a whole. When the “Layout” tab TB1 is selected, the “Processing” tab TB2 and the “Processed” tab TB3 may not be displayed and may be displayed when the layout setting is completed.

  The layout setting using the liquid crystal display 8 as described above is the same as that in Japanese Patent Application No. 2000-287040 or Japanese Patent Application No. 2000-290864, and thus detailed description thereof is omitted.

<Grinding part 10>
Furthermore, in the apparatus main body 3, as shown in FIG. 3, the grinding part 10 which has the processing chamber 4 mentioned above is provided. The processing chamber 4 is formed in a peripheral wall 11 fixed in the grinding unit 10.

  As shown in FIG. 3, the peripheral wall 11 has left and right side walls 11a, 11b, a rear wall 11c, a front wall 11d, and a bottom wall 11e. Moreover, arcuate guide slits 11a1 and 11b1 are formed in the side walls 11a and 11b.

  In the processing chamber 4, a pair of lens rotation shafts 12 and 13 penetrating the guide slits 11a1 and 11b1 are disposed. The lens rotation shafts 12 and 13 are provided coaxially, and hold (hold) the spectacle lens ML so as to be detachable between the opposed end portions.

  A carriage (not shown) is disposed in the apparatus main body 32. This carriage has a left and right arm part and a continuous part connecting the rear end parts of the left and right arm parts. And this continuous connection part is rotatably hold | maintained at the support shaft extended in right and left. In addition, the carriage is provided so that the tip portions of the left and right arm portions can be rotated up and down by lifting means (not shown), and can be driven left and right by a pulse motor (not shown). Since a well-known structure can be adopted for such a structure for moving the carriage up and down and left and right, detailed description thereof will be omitted.

  In addition, the left and right arm portions of the carriage (not shown) are disposed at positions sandwiching the peripheral wall 11 of the processing chamber 4 from the left and right, and the lens rotation shafts 12 and 13 are rotatably held at the distal ends of the left and right arm portions. Yes. The lens rotation shafts 12 and 13 are provided so as to be rotationally driven by a pulse motor (not shown).

The grinding part 10 has a grinding means 14, and the grinding means 14 has a main lens periphery grinding means and an auxiliary lens periphery processing means.
<Main lens peripheral grinding means>
The main lens periphery grinding means has a grinding wheel 15 that is rotationally driven by a grinding wheel drive motor (not shown), and this grinding wheel has a rough grinding stone, a bevel grinding stone, a finishing grinding stone, etc., not shown. The rough grinding wheel, the bevel wheel, and the finishing wheel are arranged in parallel in the axial direction.
<Auxiliary lens periphery processing means>
Further, the auxiliary lens peripheral edge processing means includes a rotating arm 16 attached to the side wall 11a so as to be capable of rotating up and down, and a drive motor such as a pulse motor (not shown) that swings (rotates up and down) the rotating arm 16. Have.

  A rotating shaft 17 and a spindle 18 are rotatably held at the free end of the rotating arm 16 and are rotated by a drive motor (not shown).

Further, chamfering grindstones 19 and 20 and a grooving cutter 21 are attached to the rotary shaft 17, and a drilling tool 22 is attached to the spindle 18. A drill is used for the drilling tool 22, but a special drill having drill portions having different diameters can also be used. In addition, when drilling a non-circular shape, a drilling tool (processing tool) such as an end mill or a reamer is attached to the spindle 18 instead of the drill.
(B) Target lens shape data measuring device 2
The target lens shape data measuring device 2 includes the measuring unit moving mechanism 100 shown in FIG. The measuring unit moving mechanism 100 includes support plates 102 and 103 fixed on a chassis 101 and a guide rail 104 that is bridged above the support plates 102 and 103. Two guide rails 104 are provided, but the other illustration is omitted. Further, the two guide rails 104 (the other not shown) are arranged in parallel with an interval in a direction orthogonal to the paper surface.

  Further, the measuring unit moving mechanism 100 is arranged between the guide rail 104 and the guide rail 104 (the other not shown) that are held in the guide rail 104 (the other not shown) so as to be movable in the extending direction of the guide rail 104. A feed screw 106 positioned below and rotatably supported by the support plates 102 and 102 and a measuring unit moving motor 107 that rotationally drives the feed screw 106 are provided.

  The feed screw 106 is provided in parallel with the guide rail 104, and the measuring unit moving motor 107 is fixed to the chassis 101. Moreover, the slide base 105 is integrally provided with a vertical plate portion 105a extending downward, and a feed screw 106 is screwed to a female screw portion (not shown) of the vertical plate portion 105a. As a result, the slide base 105 is moved left and right in FIG. 4 by rotating the feed screw 106.

  In FIG. 4, 108 is a vertically extending support plate fixed on the left end of the chassis 101, 109 is a holder support piece with the left end fixed to the upper end of the support plate 108, and 110 is attached to the side surface of the tip of the holder support piece 109. Microswitch (sensor). The micro switch 110 is used to detect a target lens holder 111 that holds a target lens shape such as a template or a demo lens formed in a target lens shape.

  The target lens holder 111 has an L-shaped cross section from a target lens holding plate part 111a and a target lens part standing plate part 111b continuously provided downward at one end of the target lens holding plate part 111a. Is formed. The target lens holding plate 111a is integrally provided with a target lens holding boss 111c, and the target lens holding boss 111c holds the target lens 112.

  A template as a target lens 112 is detachably attached to the target lens holding boss 111c with a screw 112a. However, in the case where the target lens 112 is a demo lens other than the template, since the mounting hole is not provided at the center, the base of the lens suction jig (not shown) on which the demo lens is suctioned and held is used as the target lens holding boss. The portion 111c can be detachably attached. In this case, the target lens holding boss 111c of the target lens holder 111 may have a structure that can hold the base of a lens suction jig (not shown) with a spring piece or the like without providing a female screw.

  Further, both of the lens holder 111 having the lens holding boss 111c for such a template or the lens holder 111 having the lens holding boss 111c for the lens suction jig for holding the demo lens are used. It can be prepared and used as needed.

  In FIG. 4, reference numeral 113 denotes a fixing screw held at the other end of the target lens holding plate portion 111 a, and when the target lens holding plate portion 111 a is fixed on the tip end portion of the holder support piece 109 by this fixing screw 113, The mold holding plate portion 111a hits the sensing lever 110a of the micro switch 110, and it is detected that the target lens 112 is in a measurable state.

<Ball shape measuring unit 200>
The target lens shape measuring unit 200 shown in FIG. 4 includes a rotating shaft 201 that passes through the slide base 105 and is rotatably supported by the slide base 105, and a rotating base 202 that is attached to the upper end of the rotating shaft 201. , A timing gear 203 fixed to the lower end of the rotating shaft 201, a base rotating motor 204 fixed on the slide base 105 adjacent to the rotating shaft 201, and a timing fixed to the output shaft 204a of the base rotating motor 204. A gear 205 and a timing belt 206 stretched between the timing gears 203 and 205 are provided. The output shaft 204a penetrates the slide base 105 and protrudes downward. Reference numerals 207 and 208 denote support plates protruding from both ends of the rotation base 202.

  The target lens shape measuring unit 200 includes a measuring unit 210 and a probe locating unit 250.

(Measurement unit 210)
The measuring section 210 is movable in the longitudinal direction between two guide rails 211 (not shown in the figure) spanned between the upper parts of the support plates 207 and 208 and the other guide rail 211 (not shown in the figure). The upper slider 212 that is held, the measuring shaft 213 that vertically penetrates one end of the moving direction of the upper slider 212, the roller 214 that is held at the lower end of the measuring shaft 213, and the upper end of the measuring shaft 213 are provided. And an L-shaped member 215 and a measuring element (filler) 216 provided at the upper end of the L-shaped member 215. The tip of the measuring element 216 is aligned with the axis of the measuring axis 213. The measurement shaft 213 is held by the upper slider 212 so as to be movable up and down and rotatable about the axis.

  In addition, the measurement unit 210 measures the moving amount (moving radius ρi) along the guide rail 211 of the upper slider 212 and outputs the moving radius measuring means 217 and the moving amount of the measuring shaft 213 in the vertical direction (Z-axis direction). That is, it has measuring means 218 that measures and outputs the amount of movement Zi of the measuring element 216 in the vertical direction. As the measuring means 217 and 218, a magnescale or a linear sensor can be used, and since its structure is well known, its description is omitted. In addition, the measuring unit 210 is disposed on the other end of the upper slider 212 and has a lens shape measuring element 219 having a horizontal cross section formed in a bowl shape, and the movement of the upper slider 212 moves the lens shape measuring element 219. There is a rotating shaft 220 attached to a protrusion 212a on the other end of the upper slider 212 so that it can be tilted in the direction.

  This lens-shaped measuring element 219 includes an upright drive piece 219 a that is located in the vicinity of the rotation shaft 220 and protrudes to the opposite side of the measurement surface side, and a switch operation piece 219 b that protrudes to the side of the upper slider 212. Have. A spring 221 is interposed between the side surface of the upper slider 212 and the base side surface of the upright drive piece 219a. Moreover, the spring 221 is positioned above the rotating shaft 220 in the state where the lens shape measuring element 219 is lying down as shown in FIG. In the state where the lens shape measuring element 219 stands up as shown in FIG. 4B, the spring 221 is positioned below the rotating shaft 220, and the lens shape measuring element 219 is set to the standing position. It is set to hold.

  In this standing position, the lens shape measuring element 219 is prevented from falling to the right side in FIG. 4 by a stopper (not shown). Moreover, on the side surface of the upper slider 212, a micro switch (sensor) 222 as a means for detecting that the lens shape measuring element 219 is lying down, and the detection of the lens shape measuring element 219 are detected. A microswitch (sensor) 223 is provided as means for performing the above.

  In addition, when the measuring unit moving motor 107 is operated in the state of FIG. 4A to move the slide base 105 to the left in FIG. 4, the tip of the upright drive piece 219 a is the target lens shape of the target lens holder 111. Upon contact with the filler erection plate portion 111 b, the target lens shape 219 is rotated about the rotation shaft 220 in the clockwise direction against the spring force of the spring 221. With this rotation, when the spring 221 moves upward beyond the rotation shaft 220, the target stylus 219 is raised by the spring force of the spring 221, and the target stylus 219 is not shown. The stopper and the spring 221 are held in the standing position as shown in FIG. 4B.

  The microswitch 222 is turned ON directly on the measurement surface of the lens shape measuring element 219 when the lens shape measuring element 219 falls down, and the microswitch 223 is turned ON by the switch operation piece 219b when the lens shape measuring element 219 stands up. It is like. 208 a is a stopper provided on the support plate 208, 224 is an arm attached to the support plate 208, and 225 is a microswitch (sensor) attached to the tip of the arm 224. The micro switch 225 is turned on when the upper slider 212 comes into contact with the slider stopper 208a to detect the initial position of the upper slider 212.

  A pulley 226 is rotatably held on the upper side surface of the support plate 207, one end portion of the wire 227 is fixed to one end portion of the upper slider 212, and one end portion of the spring 228 is locked to the other end portion of the wire 227. The other end of the spring 228 is attached to the tip of the arm 224. The wire 227 is stretched around the pulley 226.

(Measuring element positioning means 250)
This probe locating means 250 is provided in a longitudinal direction between two guide rails 251 (not shown) and the other guide rails 251 (not shown) spanned between lower portions of the support plates 207 and 208. A lower slider 252 that is movably held by the motor, a drive motor 253 that is positioned below the lower slider 252 and is fixed to the rotary base 202, and near the center of the side surface of the rotary base 202 close to the drive motor 253. And a locking pin (stopper) 254 projecting from the head.

  Rack teeth 255 are arranged in the movement direction on the lower surface of the lower slider 252, and locking pins (stoppers) 256 and 257 are provided on the side surface of the lower slider 252 at intervals in the movement direction. A gear 258 that meshes with the rack teeth 255 is fixed to the shaft. Moreover, the locking pin 256 is positioned slightly above the locking pin 257, and a shaft raising / lowering operation member 259 is disposed on the side of the lower slider 252.

  The shaft raising / lowering operation member 259 is formed in an L shape from a long piece 259a disposed between the locking pins 256 and 257 and a short piece 259b integrally provided downward and obliquely at the lower end of the long side 259a. ing. The shaft raising / lowering operation member 259 is rotatably held at the intermediate portion in the vertical direction on the side surface of the lower slider 252 by the rotation shaft 260 at the bent portion. A spring 261 is interposed between the tip of the short piece 259b and the upper part of the side surface of the lower slider 252.

  The spring 261 is positioned above the rotation shaft 260 at the position where the long piece 259 a is in contact with the locking pin 256 and presses the long piece 259 a against the locking pin 256, and the long piece 259 a is locked to the locking pin 257. In a position where the long piece 259 a is in contact with the locking pin 257, the long piece 259 a is pressed against the locking pin 257.

  A support plate 262 that extends upward is provided at one end of the lower slider 252, and a pressing shaft 263 that penetrates the upper end of the support plate 262 is held so that the lower slider 252 can move forward and backward. . A retaining retainer 264 is attached to one end of the pressing shaft 263, and a large-diameter pressing portion 263a facing the one end surface 212b of the upper slider 212 is integrally provided at the other end of the pressing shaft 263. A spring 265 wound around the pressing shaft 263 is interposed between the large diameter portion 263a and the support plate 262. The pressing portion 263a is brought into contact with the end surface 212b of the upper slider 252 by the spring force (biasing force) of the springs 228 and 265.

As will be described later, the target lens shape measuring apparatus 2 having such a structure calculates the spectacle frame F or the target lens shape as the radius ρi with respect to the angle θi, that is, the lens shape information (θi, ρi) in the polar coordinate format. Be able to.
(Control circuit)
The measurement unit moving motor 107, the base rotation motor 204, and the drive motor 253 described above are driven and controlled by the arithmetic control circuit 300 shown in FIG. In addition, the arithmetic control circuit 300 receives measurement (measurement) signals from the radial measurement means (radial measurement apparatus) 217 and the measurement means (measurement apparatus) 218 for measuring the vertical direction, and the micro switch 110. , 222, 223, 225 and the like are input. Reference numeral 301 denotes a memory connected to the arithmetic control circuit 300.
(3) Shaft 400
1 includes a case 401, and a front wall 402 of the case 401 includes an upper inclined wall portion 402a and a lower vertical wall portion 402b.

  The inclined wall 402a is provided with a liquid crystal display 403 as a display device (display means). The front wall 402 is formed with a lens entrance / exit 404 straddling the inclined wall 402a and the vertical wall 402b, and a lid (lid) 405 for opening and closing the lens entrance / exit 404 is attached. The lid 405 is provided so as to be pivotable up and down around the upper edge, and opens the lens entrance 404 when pivoted upward.

In the case 401, as shown in FIG. 6, a chassis 406 fixed to the bottom, a measurement optical system 407, a lens suction jig attaching device 408, and a lens moving mechanism 409 are disposed. The lens moving mechanism 409 moves the eyeglass lens ML between a position where the measurement optical system 407 is provided and a position where the lens suction jig attaching device 408 is provided.
(Measurement optical system 407)
The measurement optical system 407 includes a cylindrical lens receiver 407a, a projection optical system 407b that projects a measurement light beam onto a spectacle lens placed on the lens receiver 407a, and a light receiving optical system that receives the measurement light beam transmitted through the lens receiver 407a. 407c.

  The projection optical system 407b includes a light source a1, a diaphragm (pinhole) a2, a reflection mirror a3, and a collimator lens a4 in this order. The light receiving optical system 407c has a pattern plate b1 and a lens b2, and guides a measurement light beam to a light receiving element 407d such as a CCD.

A ring pattern, a lens array, a Hartmann plate, or the like can be used for the pattern plate 407d.
(Lens suction jig mounting device 408)
The lens suction jig mounting device 408 includes a cylindrical support post 410 fixed on the chassis 406, a movable support 411 fitted to the support post 410 so as to be movable up and down, and a predetermined range at the upper end of the movable support 411. The arm 412 is attached so as to be movable up and down, the coil spring 413 that biases the arm 412 downward, and the jig holder 414 attached to the lower surface of the distal end of the arm 412.

The movable column 411 is provided so as to be lifted and lowered by a lifting means having a pulse motor and a feed screw (not shown), and the base of the lens suction jig 415 is detachably held by the jig holder 413.
(Lens moving mechanism 409)
The lens moving mechanism 409 is held by brackets 416 and 417 attached to the chassis 406, guide bars 418 and 418 held parallel to the brackets 416 and 417, and movable in the longitudinal direction by the guide bars 418 and 418. A first slide base 419 is provided.

  The lens moving mechanism 409 includes guide bars 420 and 420 that are mounted in parallel to the slide base 419 so as to be orthogonal to the guide bars 418 and 418, and first guide bars 420 and 420 that are attached to the guide bars 420 and 420 so as to be movable in the longitudinal direction. A two-slide table 421 is provided.

  The first slide base 419 is driven to advance and retract in the longitudinal direction of the guide bars 418 and 418 by a feed screw 422 and a pulse motor (drive device, drive means) 423 that drives the feed screw 422. The second slide base 421 is driven to advance and retract in the longitudinal direction of the guide bars 420 and 420 by a feed screw 424 and a pulse motor (drive device, drive means) 425 that drives the feed screw 424.

  A large-diameter hole 419 a is formed at the center of the first slide base 419, and a cylindrical lens receiver 426 is formed at the center of the second slide base 421. A plurality of rotation support plates 427 that rotate around a support shaft 427 a at one end are attached around the lens receiver 426, and a lens holding member 428 is provided at the other end of each rotation support plate 427. Yes.

  The plurality of rotation support plates 427 are simultaneously moved forward and backward with respect to the lens receiver 426 by a drive means such as a drive motor or a solenoid (not shown) and a link mechanism or a cam mechanism. The ML is sandwiched at the same time or the sandwiched state is released.

  Further, as shown in FIG. 5, the pulse motors 423 and 425 are controlled by the arithmetic control circuit 429, and the arithmetic control circuit 429 controls a pulse motor (not shown) of the lens suction jig mounting device 408. The operation is controlled. The arithmetic control circuit 429 is connected to a start switch 430 for measurement times. In addition, the arithmetic control circuit 429 receives a measurement signal from the light receiving element 419.

Next, a processing system for a spectacle lens having such a configuration will be described.
(1) Measurement of shape of target lens such as template and demo lens Before measuring the shape of target lens 112 such as template and demo lens as shown in FIG. The reference template 500 whose outer shape is known in advance is held on the target lens holding boss 111 c of the target lens holder 111. In FIG. 9, the reference template 500 is square, but the reference template 500 may be circular.

  Here, the reference mold plate 500 is attached to the target lens holding boss portion 111c so that the axis (center) of the target lens holding boss portion 111c and the attachment center O1 of the reference template plate 500 exactly coincide with each other.

  In this state, the measurement unit moving motor 107 is operated to move the slide base 105 to the left in FIG.

  As a result, the tip of the upright drive piece 219 a hits the target lens plate 111 b of the target lens holder 111, and the target stylus 219 is centered on the rotation shaft 220 against the spring force of the spring 221. It can be rotated clockwise. Along with this, the micro switch 222 is turned OFF.

  When the spring 221 moves upward beyond the rotation shaft 220 along with this rotation, the target lens 219 is raised by the spring force of the spring 221, and the target lens 219 is moved. It is held in the standing position as shown in FIG. 4B by the action of a stopper (not shown) and the spring 221. In this standing position, the micro switch 223 is turned on by the switch operating piece 219 b of the target stylus 219, and this signal is input to the arithmetic control circuit 300.

  When the micro switch 223 is turned on, the arithmetic control circuit 300 further controls the operation of the measuring unit moving motor 107 to move the slide base 105 further leftward in FIG. The measurement unit moving motor 107 is stopped by operating the measurement unit moving motor 107 so that the rotation center O2 (B), which is the axis of 201, coincides with the approximate mounting center O1 of the target lens holding boss 111c.

  Thereafter, the arithmetic control circuit 300 operates the drive motor 253, rotates the gear 258 counterclockwise, and moves the lower slider 252 to the left, whereby the pressing portion 263a of the pressing shaft 263 is moved to FIG. As shown in (a), it is moved away from the upper slider 252. Along with this operation, the upper slider 212 is moved to the left by the spring force of the spring 228, and the measurement surface of the lens shape measuring element 219 is brought into contact with the peripheral edge of the reference template 500.

  In this state, the base rotating motor 204 is rotated to rotate the rotating shaft 201, thereby moving the target stylus 219 along the periphery of the reference template 500. Then, the movement of the upper slider 212 is detected by the moving radius measuring means 217, and the output of the moving radius measuring means 217 is input to the arithmetic control circuit 300.

  The arithmetic control circuit 300 obtains the radius ρi of the reference template 500 based on the output from the measuring means 217, and associates the radius ρi with the rotation angle θi of the base rotary motor 204 to obtain lens shape information (θi, ρi), the lens shape information of the reference template 500, that is, the lens shape information (θi, ρi) is stored in the memory 301 (not shown).

  The lens shape information (θj, ρj) of the reference template 500 is information with the axis (rotation center) O2 (B) of the rotation shaft 201 of the lens shape measuring element 219 as the measurement center. Therefore, the lens shape information (calculated in advance by calculation) when the rotation center O2 (B) of the lens shape measuring element 219 and the mounting center O1 of the reference template 500 coincide with each other from the lens shape information (θj, ρj). Information) and the lens shape information (θj, ρj) obtained by the measurement, a coordinate difference Δ (θk) between the rotation center O2 (B) of the lens shape measuring element 219 and the mounting center O1 of the reference template. , Ρk). This coordinate difference Δ (θk, ρk) may be obtained once.

  Next, when measuring the shape of the target lens 112 such as a template or a demo lens using the target lens holder 111, the target lens 112 is held by the target lens holding boss 111 c of the target lens holder 111. FIG. 4 shows an example in which a target lens 112, which is a template, is fixed with screws 112a. In this example, the axis (center) of the target lens holding boss 111c and the geometric center of the target lens 112 substantially coincide. When the target lens 112 is a demo lens other than the template, a lens suction jig (not shown) is attached so that it matches the approximate center of the target lens 112 as much as possible, and this lens suction jig is attached to the target lens holding boss. 111c.

  In this state, the arithmetic control circuit 300 brings the lens shape measuring element 219 into contact with the peripheral surface of the target lens 112 as described above, and the lens shape information of the target lens 112 in the same manner as the reference template 500 described above. In addition to obtaining (θi, ρi), the coordinates of the rotation center O2 (M) of the lens shape measuring element 219 at the time of measuring the lens shape 112 are obtained. The lens shape information (θi, ρi) as the lens shape information and the coordinates of the rotation center O2 (M) of the lens shape measuring element 219 are stored in the memory 301.

  Further, the arithmetic and control circuit 300 obtains a coordinate difference Δ (θm, ρm) between the rotation center O2 (M) of the lens shape measuring element 219 and the mounting center O1 of the lens shape 112 and the lens shape information (θi, ρi). ) To determine the slip difference Δ (θn, Gn) between the geometric center G and the mounting center O1 of the target lens 112, and the slip difference Δ (θp, Gp) between the geometric center G and the rotation center O2 (M). Ask for. Also, the interpupillary distance PD of the spectacle wearer measured with a PD meter or the like is input, the pupil center (optical center) position is obtained from the interpupillary distance PD and lens shape information (θi, ρi), and measurement for the target lens shape The difference between the rotation center O2 (M) of the child 219 and the pupil center (optical center) position is obtained.

  Each data thus obtained is stored in the memory 301 and used as lens processing data.

  Further, the target lens shape measuring device 2 reads the point frame mounting hole position data (position table) of the target lens 112, that is, one data of the mounting holes 112b and 112c of FIGS. The point frame mounting hole position data (position table) is stored in the memory 301.

Then, the lens shape information (θi, ρi) stored in the memory 301 of the target lens shape measuring apparatus 2, the coordinates of the rotational center O2 (M) of the target lens shape 219, the rotational center O2 of the target lens shape 219. (M) is a coordinate difference Δ (θm, ρm) between the lens 112 and the mounting center O1, a seat difference Δ (θn, Gn) between the geometric center G of the lens 112 and the mounting center O1, and a geometric center G. And the rotation center O2 (M), the difference between the seat difference Δ (θp, Gp), the pupil center (optical center) position, and the rotation center O2 (M) of the lens shape measuring element 219 and the pupil center (optical center) position. The difference, the point frame mounting hole position data (position table), and the like are transferred to the arithmetic control circuit 429 of the pivoting device 400.
(2) Attaching the Lens Suction Jig 415 to the Eyeglass Lens ML In order to attach the lens suction jig 415 to the eyeglass lens ML, first, an unprocessed circular eyeglass lens ML is mounted on the lens receiver 426 of the shaft 400. Put.

  When the start switch 430 is pressed in this state, the arithmetic control circuit 429 operates the pulse motor 423 to move the first slide base 419 to the measurement optical system 407 side.

  At this time, the arithmetic control circuit 429 controls the rotation of the plurality of rotation support plates 427 controlled by the driving means by operating the driving means (not shown) and controlling the driving means (not shown). Thus, the spectacle lens ML placed on the lens receiver 426 is held by the lens holding members 428 of the plurality of rotation support plates 427.

  In this state, the arithmetic control circuit 429 further moves the spectacle lens ML placed on the lens receiver 426 of the second slide base 421 to the measurement optical system 407 side, so that it is between the projection optical system 407a and the lens receiver 407b. Arrange.

  On the other hand, the measurement light beam from the light source a1 of the projection optical system 407a is projected onto the spectacle lens ML via the stop a2, the reflection mirror a3, and the collimator lens a4. The measurement light beam projected onto the spectacle lens ML is projected onto the light receiving element 407d via the pattern plate b1 and the lens b2.

  Then, the arithmetic control circuit 429 controls the operation of the pulse motors 423 and 425 based on the prism amount of the spectacle lens ML based on the measurement signal from the light receiving element 407d, thereby measuring the approximate center (optical axis) of the spectacle lens ML. 407 on the optical axis.

  Moreover, in this state, the arithmetic control circuit 429 calculates the refraction characteristics of the spectacle lens ML from the measurement signal from the light receiving element 407d. As the refractive characteristics, the optical center of the spectacle lens ML, the spherical power S, the cylindrical power C, the cylindrical shaft angle A, and the like are obtained.

  Further, the arithmetic control circuit board 429 includes lens shape information (θi, ρi), coordinates of the rotation center O2 (M) of the lens shape measuring element 219, rotation center O2 (M) of the lens shape measuring element 219 and the ball. A coordinate difference Δ (θm, ρm) from the mounting center O1 of the mold 112, a coordinate difference Δ (θn, Gn) between the geometric center G of the target lens 112 and the mounting center O1, a geometric center G and a rotation center O2 (M ) Coordinate difference Δ (θp, Gp), pupil center (optical center) position, difference between the rotational center O2 (M) of the lens shape measuring element 219 and the pupil center (optical center) position, point frame mounting hole Data such as position data (position coordinates) is transferred from the target lens shape measuring apparatus 2.

  In addition, the spectacle prescription value is input to the arithmetic control circuit 429. The spectacle prescription value may be input by providing an input unit such as a keyboard in the pivot 400, or the pivot 400 and the lens grinding apparatus 1 are connected to each other. Input may be performed using the operation panels 6 and 7.

  Then, the arithmetic control circuit 429 superimposes the lens shape of the target lens 112 on the shape of the spectacle lens ML based on the data transferred from the target lens shape measuring apparatus 2 and the input spectacle prescription value, and the liquid crystal display 403 is displayed. Note that the spectacle lens ML and the lens shape 112 ′ in FIG. 10 show this relationship.

  Next, the arithmetic control circuit 429 controls the operation of the pulse motor 423 to move the first slide base 419 to the position of the lens suction jig mounting device 408, and then controls the operation of the pulse motors 423 and 425 to perform glasses control. The rotation center O2 (M) of the lens shape measuring element 219, which is the measurement center of the lens ML, is aligned with the center of the lens suction jig 415 of the lens suction jig mounting device 408.

  At this position, the arithmetic control circuit 429 controls the operation of a pulse motor (not shown) of the lens suction jig mounting device 408 to move and displace the movable support column 411 and the arm 411 downward and hold the lens suction jig held by the arm 412. 415 is adsorbed to the mirror lens ML placed on the lens receiver 426.

As a result, the lens suction jig 415 is moved to the mirror lens ML in a state where the center (axis) of the lens suction jig 415 coincides with the rotation center O2 (M) of the target stylus 219 that is the measurement center of the spectacle lens ML. Adsorbed and held. A positioning groove (not shown) for positioning is formed as a positioning means at the base of the lens suction jig 415. The direction of the positioning groove and the position of the lens shape are determined by the lens suction jig 415 as a mirror lens. It is already known when attracting and holding ML.
(3) Processing of spectacle lens In this way, the base portion of the lens suction jig 415 sucked and held by the mirror lens ML is fitted into a mounting hole (not shown) provided at the end of the lens rotating shaft 12 of the lens grinding device 1. Then, by engaging the positioning groove at the base of the lens suction jig 415 with a protrusion (not shown) in the mounting hole, the lens suction jig 415 and the lens rotating shaft 12 are positioned, The eyeglass lens ML is pressed against the lens rotation shaft 12 by the lens presser 13 a at the other end of the lens rotation shaft 13. In this way, the spectacle lens ML is held between the lens rotation shafts 12 and 13.

  On the other hand, by pressing the “data request” switch 7 c, the lens shape information (θi, ρi), the coordinates of the rotation center O 2 (M) of the lens shape measuring element 219, the lens shape measuring element 219, and the like. The coordinate difference Δ (θm, ρm) between the rotation center O2 (M) and the mounting center O1 of the target lens 112, the coordinate difference Δ (θn, Gn) between the geometric center G of the target lens 112 and the mounting center O1, and the geometry The coordinate difference Δ (θp, Gp) between the center G and the rotation center O2 (M), the pupil center (optical center) position, the rotation center O2 (M) of the target stylus 219 and the pupil center (optical center) position Transfer of data such as the difference between the points and the point frame mounting hole position data (position coordinates).

  As a result, these data are transferred from the lens shape measuring apparatus 2 to the lens grinding apparatus 1. Then, the lens grinding apparatus 1 rotates the spectacle lens ML integrally with the lens rotation shafts 12 and 13 based on the lens shape information (θi, ρi) of the transferred data, and moves up and down by a lifting means (not shown). The peripheral edge of the spectacle lens ML is ground into the lens shape (lens shape) of the lens 112 while being controlled by the grinding wheel 15.

  Since the center of measurement is used as the processing center when grinding the periphery of the lens, the spectacle lens thus ground can be accurately formed in the same shape as the lens shape (lens shape) of the lens 112.

  In this state, the arithmetic control circuit (not shown) of the lens grinding apparatus 1 rotates the lens rotating shafts 12 and 13 based on the point frame mounting hole position data (position table) and operates a drive motor (not shown). The pivot arm 16 is pivoted upward to cause the drilling tool 22 to correspond to the drilling position of the spectacle lens ML.

  Then, a drive motor (not shown) is operated to rotate the spindle 18 and the drilling tool 22 together, and the carriage (not shown) is moved to the left in FIG. 3 to thereby rotate the lens rotation shafts 12 and 13 and the spectacle lens ML. Is moved to the left, and an attachment hole for attaching the point frame is made in the spectacle lens ML.

  Further, since this drilling process is based on the measurement center, it is possible to make a mounting hole for attaching the point frame at an accurate position.

  As described above, according to the embodiment of the present invention, the layout of the rimless frame using the layout apparatus capable of measuring the peripheral shape of the demonstration lens and aligning the block center with the measurement center to perform the layout of the wearer. In addition, processing data is created based on the measurement center, and processing is performed based on the processing data.

  Accordingly, the trace (shape measurement) data is acquired as the radial ρ data with reference to the trace center, and the geometric center and the lens width when this is converted into the XY coordinates are obtained, and the designated nose interval distance (or The deviation amount from the geometric center is obtained from the frame PD) and the wearer's prescription PD (interpupillary distance).

  Further, since the deviation amount between the geometric center and the measurement center can be obtained by a known method from the coordinate conversion data, it can be obtained as a displacement amount when the wearer's PD position is based on the trace center.

  Based on this displacement amount, an optical center position indicating scale for the lens block device is displayed, and processing data of the processing device is similarly created as data based on this position.

  When the spectacle lens processed based on the processed data is considered based on the center of the lens mounting block, the processing is completed in a state in which the spectacle lens is mounted at a position completely coincident with the traced (shape measurement) dummy lens.

  A dummy lens is fixed with the lens mounting block as a reference and fixed in a state where a hole can be drilled to fix the lens to the frame, and a tool (such as a drill) for processing a lens that is actually processed into this hole is smooth. The lens fixing base is adjusted by using functions such as an XY stage and a tilt stand so that it can pass through the holes.

  Move the tool to a position where it does not interfere with the dummy lens, and remove the dummy lens without changing the relative positional relationship of the XY stage, tilt stand, etc. Install holes and drill holes.

  The principle of the above-described embodiment will be described below. That is, first, as shown in FIG. 11, the peripheral shape of the dummy lens (demonstration lens) 600 is measured by the target lens shape measuring apparatus 2. The measurement center O (the rotation center O2 (M) of the lens shape measuring element 219 in FIG. 9) is the rotation center of the rotation shaft 201.

Here, the measurement center O is the rotational center of the rotation shaft 201, and the geometric center O _G of the ball-shaped dummy lens (demo lens) 600, the optical center (guiding center of the wearer's eye) of spectacle lenses O _If the relationship of coordinates with _O is expressed, it can be expressed as shown in FIG.

Further, the peripheral shape of the target lens is measured as the measurement center O, and the coordinates of the four peripheral points are A (ρ _A , θ _A ), B (ρ _B , θ _B ), C (ρ _C , θ _C ), D (ρ _D , θ _D ).

By performing orthogonal coordinate system coordinate conversion, A (X _A , Y _A ), B (X _B , Y _B ), C (X _C , Y _C ), and D (X _D , Y _D ) are obtained.

となる。 At this time, if the coordinates of the geometric center O _G of the target lens are O _G (X _G , Y _G ) in the orthogonal coordinate system, O _G (X _G , Y _G ) is

It becomes.

となる。この式（２）は、測定中心Ｏを基準とした眼鏡レンズの光学中心（装用者眼の瞳中心）を表している。 Further, pupillary distance of the spectacle wearer eye (PD) was measured with a PD meter, determine the dummy lens displacement amount between the geometrical center O _G of the target lens shape of the (demo lens) 600 (inset), inset I, when the top justify U, O _O (pupil center the wearer's eye) optical center of the spectacle lens

It becomes. This expression (2) represents the optical center of the spectacle lens with respect to the measurement center O (the pupil center of the wearer's eye).

  Therefore, when the processing center of an unprocessed spectacle lens to be processed for peripheral processing is made coincident with the measurement center O, the measurement center can be set as the processing center via the optical center of the spectacle lens.

  In addition, in the peripheral processing of the spectacle lens, the peripheral processing is performed using the measurement center O as the processing center based on the shape data (ρ, θ) based on the measurement center O of the demonstration lens (dummy lens) 600.

  In addition to the box center (lower geometric center) and optical center (optical center of spectacle lens = pupil center of the eye of the wearer) in the "adsorption position" (processing center), A measurement center is provided. Further, as described above, the drilling device may be a lens grinding device with a spindle, or a dedicated drilling device.

  Actually, it is generally known that the dummy lens that has been measured is set on a drilling machine (drill stand) based on the mounting bracket for processing, and the processing blade matches the hole position of the dummy lens. Work to align position, angle, etc. using a positioning device, XY table, tilt stand, etc.

  When accurate positioning is completed, the dummy lens is removed, and the lens that has been processed into the same shape is fixed via a processing fixture. As a result, the lens can be set at a position coincident with the dummy lens with the fixture as a reference, so that the processed lens can be drilled so as to have the same relationship with the hole position.

  As a means for realizing this method, the conventional processing layout apparatus is programmed to attach the processing fixture based on either the lens optical center or the frame-shaped boxing center (geometric center). However, this can be realized by providing means that enables the processing tool to be attached at the center position read by the frame shape measuring apparatus.

  As the drilling machine, a normal drill stand can be used, but it is desirable to use a desktop vertical milling machine with an XY feeding device, and it is more desirable if there is a tilt mechanism of the blade head.

  As described above, the eyeglass lens processing method according to the embodiment of the present invention measures the peripheral shape of the demonstration lens (lens 112) of the rimless frame, and the block center (lens suction jig) is measured at the measurement center O. The center of 415, the processing center) are matched, and the spectacle lens is processed at the center that matches the measurement center O. According to this configuration, even a beginner can easily measure the peripheral shape of the demonstration lens attached to the rimless frame, and easily process the raw spectacle lens into a target lens shape using the measurement data. A bracket mounting hole can be easily opened in the processed spectacle lens.

  Further, in the processing method of the spectacle lens according to the embodiment of the present invention, the peripheral shape of the demonstration lens (lens 112) of the rimless frame is measured, and the measurement center (the measurement center O in FIG. 10 or the lens in FIG. 9) is measured. Laying out using a layout device capable of aligning the block center (center of the lens suction jig 415) with the rotation center O2 (M) of the measuring stylus 219 and performing the layout of the wearer, and using the measurement center as a reference Processing data is created and processed based on this, so even beginners can easily measure the peripheral shape of the demonstration lens attached to the rimless frame and use the measurement data to make unprocessed spectacle lenses Can be easily processed into a target lens shape, and a bracket mounting hole can be easily formed in the processed spectacle lens.

1 is a schematic explanatory diagram of a spectacle lens processing system for carrying out the spectacle lens processing method of the present invention; FIG. (A) is explanatory drawing of the operation panel of the lens grinding processing apparatus of FIG. 1, (B) is explanatory drawing of the display apparatus of the lens grinding processing apparatus of FIG. It is explanatory drawing in the process chamber of the lens grinding processing apparatus of FIG. (A), (b) is principal part explanatory drawing of the measuring apparatus of a target lens shape measuring apparatus. FIG. 2 is a control circuit diagram of the eyeglass lens processing system of FIG. 1. FIG. 2 is a schematic explanatory diagram of the pivoting device in FIG. 1. It is a perspective view which shows the relationship between the slide stand of FIG. 6, and a lens adsorption jig mounting apparatus. FIG. 8 is a plan view of FIG. 7. It is explanatory drawing which shows the relationship between a lens shape, a measurement center, etc. FIG. It is a perspective view which shows the relationship between a lens shape, a measurement center, etc. FIG. It is another explanatory drawing which shows the relationship between a lens shape, a measurement center, etc.

Explanation of symbols

112 ... Tamagata (rimless frame demonstration lens)
O ... Measurement center O2 (M) ... Rotation center 415 ... Lens adsorption jig

Claims (1)

A method for processing a spectacle lens, comprising measuring a peripheral shape of a demonstration lens of a rimless frame, aligning a block center with the measurement center, and processing the spectacle lens at a center corresponding to the measurement center.

Images