JP5542467B2 - Processing availability judgment device - Google Patents

Description

  The present invention makes it possible to determine whether or not to process a fabric spectacle lens and a target lens shape, to allow an operator to recognize a fabric lens having a diameter necessary for processing, and to process or not to attach a suction jig (suction cup). The present invention relates to a determination device.

  Conventionally, as shown in FIG. 14 of Patent Document 2, a spectacle lens processing apparatus for processing with a close amount based on a geometric center has been known.

  On the other hand, as shown in Patent Document 1, a spectacle lens processing apparatus that obtains a bevel locus based on a shift amount based on an optical center is also known.

JP 2006-102846 A JP 2006-221735 A

  However, when the amount of movement based on the conventional geometric center is used, when processing a lens corresponding to a high curve frame having a frame curve of a spectacle lens frame of +5 curve or more, that is, about +6 curve or +8 curve, During lens measurement, when the raw lens diameter and target lens shape are judged as unprocessed, an error occurs due to insufficient grinding allowance for the raw lens, or the fabric lens is processed with insufficient grinding allowance. Until the bevel is formed normally.

  That is, the PD correction calculation requires the lens front curve value obtained by the lens edge measurement. Therefore, after the processing is started, the first lens measurement (bevel apex position) is executed, and the lens front curve value is calculated for the first time. PD correction was performed. Since the PD correction amount obtained in the first round measurement is taken into consideration for the next second round measurement (the bevel shoulder position), the curvature of the frame is strong in the case of a high curve frame, and the lens used also has a curve. Since it is deep, there were cases where the vicinity of the first round or the outside of the first round was measured.

  When close to the inside of the first lap, the lens measurement for the second lap is cleared, and after processing is completed, the bevel formation is incomplete due to insufficient fabric, making it the worst failure processing without being able to fit into the frame. .

  On the other hand, in the case of the outer side of the first round, the lens sensor comes off on the ear side during measurement of the second round, resulting in a measurement error. In this case, a fabric lens of the required diameter must be prepared, and the alignment work must be repeated. did not become.

  Therefore, the present invention solves the above-mentioned problems, obtains the amount of shift based on the optical center (eyeglass wearer's eye, optical axis), and attracts jigs based on the optical center position even for high-curve fabric lenses. An object of the present invention is to provide an apparatus for determining whether or not machining is possible, which performs a sufficient unprocessed determination and realizes an accurate grinding process.

In order to achieve this object, the workability determination device of the present invention measures the shape of the lens frame of the spectacle frame as a target lens shape, or measures the shape of the spectacle lens as a target lens shape from a template or a demo lens. A mold shape measuring device, a display device for displaying the target lens shape measured by the target lens shape measuring device, a geometric center distance FPD of the right and left eyeglass lenses, and a left and right pupil distance PD of the eyeglass wearer A data input means for inputting, a difference between the geometric center distance FPD and the inter-pupil distance PD is obtained as a shift amount that is an eccentric amount with respect to the geometric center of the left and right target lens shapes, and the peripheral edge of the spectacle lens is is processed into the target lens shape, eccentric processed the spectacle lenses when mounted on the spectacle frame, relative to the geometrical center of the optical center of the spectacle lens the shift amount by the spectacle lens And a calculation control circuit for obtaining the processed data of the spectacle lenses corrected so that. Further, the arithmetic control circuit overlaps the optical center with the target lens shape based on the processing data, displays the layout on the display device, and processes the peripheral edge of the spectacle lens into the target lens shape. The shape of the suction jig of the lens suction jig used for mounting on the lens rotation shaft of the grinding device is displayed on the display device in a layout together with the optical center and the target lens shape. It is possible to determine whether or not the lens suction jig interferes with the grinding wheel when grinding. Further, the processing availability determination device includes a switch for inputting a numerical value of a warp angle of the lens frame of the spectacle frame, and an edge thickness measuring means for measuring the edge thickness of the spectacle lens held on the lens rotation shaft of the lens grinding apparatus. And .
In addition, the arithmetic control circuit measures, with the edge thickness measuring means, the positions in the optical axis direction at several positions on the lens-shaped portion of the front refractive surface of the spectacle lens held on the lens rotation axis. The front curve of the front refractive surface of the spectacle lens is calculated based on the measured positions of the front refractive surface at several locations in the optical axis direction, while the target lens shape is measured from the template or the demo lens. If the target lens shape is measured from the template or the demo lens, an input frame for inputting the value of the warp angle by the switch is displayed on the display device. It is for. The arithmetic control circuit obtains correction data for the shift amount of the optical center based on the calculated front curve and a warp angle input to the input frame by the switch, and the optical center matches the pupil center. A correction amount to be obtained is determined based on the correction amount correction data , correction processing data based on the correction amount is calculated, a correction optical center and a target lens shape based on the correction processing data are displayed, and the suction jig By aligning the center of the shape with the geometric center or the corrected optical center and displaying the suction jig shape by superimposing the target lens shape, the lens is used when the spectacle lens is ground by a grinding wheel. It can be determined whether the suction jig interferes with the grinding wheel.

  According to this configuration, the amount of shift based on the optical center (eyeglass wearer's eye, optical axis) is obtained, and a high-curve fabric lens is also attached with an adsorption jig based on the optical center position. Unprocessed determination can be performed, and accurate grinding can be realized.

It is explanatory drawing which shows the relationship between a lens grinding processing apparatus provided with the layout display apparatus which concerns on embodiment of this invention, and a frame shape measuring apparatus. 1 shows a lens grinding apparatus according to an embodiment of the present invention, and is a perspective view of a main processing part in a processing chamber. 1 shows a lens grinding apparatus according to an embodiment of the present invention, in which (A) is an enlarged explanatory view of a first operation panel, and (B) is a front view of a liquid crystal display. It is explanatory drawing of the control circuit of the lens grinding processing apparatus which concerns on embodiment of this invention. It is a time chart for demonstrating control of a control circuit. It is explanatory drawing which shows the example of a display of the normal chamfering process of the liquid crystal display of FIG. It is explanatory drawing which shows the pop-up menu displayed on the liquid crystal display of FIG. It is a figure which shows the state which selected "special (front and back)" in the pop-up menu shown in FIG. It is a figure for demonstrating the state in which an example of the display for special chamfering was shown on the screen. It is explanatory drawing which shows the state by which the simulation screen was displayed on the liquid crystal display. It is a flowchart for demonstrating the lens grinding method. It is a flowchart for demonstrating the lens grinding method. It is explanatory drawing which shows the example of a display for PD correction | amendment. It is a schematic diagram for demonstrating the curvature angle for PD correction | amendment. It is explanatory drawing for PD correction calculation. It is explanatory drawing which shows a flame | frame curvature angle, an optical center, a suction cup, a BOX center, etc., and the amount of eccentricity. It is explanatory drawing which shows a flame | frame curvature angle, an optical center, a suction cup, a BOX center, etc., and the amount of eccentricity. It is a layout screen display of a liquid crystal display (display device). It is a layout screen display of a liquid crystal display (display device). It is a schematic diagram which shows the relationship between a processed lens, a suction cup, an optical center, and a BOX center. It is explanatory drawing which shows a suction cup, a BOX center, etc., and the amount of eccentricity. It is explanatory drawing which shows a suction cup, a BOX center, etc., and the amount of eccentricity. It is a schematic diagram which shows the relationship between a processed lens and a suction cup. It is explanatory drawing which shows an optical center, a suction cup, a BOX center, etc., and the amount of eccentricity. It is explanatory drawing which shows an optical center, a suction cup, a BOX center, etc., and the amount of eccentricity. It is a back explanatory view of a simple pivoting device. It is a schematic diagram which shows the relationship between a processed lens, a suction cup, an optical center, and a BOX center. It is explanatory drawing which shows a suction cup, a BOX center, etc., and the amount of eccentricity. It is explanatory drawing which shows a suction cup, a BOX center, etc., and the amount of eccentricity. It is explanatory drawing which showed the curve | deflection angle | corner of the spectacles frame F, the curve of the spectacles lens, and the amount of eccentricity. It is explanatory drawing which shows the connection relation of a lens grinding processing apparatus provided with the layout display apparatus which concerns on embodiment of this invention, a frame shape measuring apparatus, and a lens holding jig mounting apparatus (suction jig mounting apparatus). 1 shows an appearance of a lens holding jig mounting device according to the present invention. It is explanatory drawing of the liquid crystal display of FIG. It is explanatory drawing of the display content of the liquid crystal display of FIG. It is explanatory drawing which shows the other example of the display content of the liquid crystal display of FIG. It is explanatory drawing which shows the other example of the display content of the liquid crystal display of FIG. (A) is explanatory drawing which showed the control circuit of the lens holding jig mounting apparatus shown in FIG. H1, and (b) the measurement example of the spectacle lens. It is explanatory drawing which showed the other example of the optical system shown in FIG. It is a disassembled perspective view which shows the relationship between the outer case and frame of the lens holding jig mounting apparatus of FIG. It is a top view of the flame | frame of FIG. H3. It is a schematic explanatory drawing inside the lens holding jig mounting apparatus shown in FIG. It is action explanatory drawing of FIG. H5. It is a perspective view of CL measuring apparatus of Drawing H5 and Drawing H6. It is a perspective view for demonstrating the lens holder of FIG. H5, FIG. It is a top view of FIG. H8. It is sectional drawing which follows the A1-A1 line | wire of FIG. H9. It is sectional drawing which follows the A3-A3 line | wire of FIG. H9. It is sectional drawing which follows the A2-A2 line of FIG. H9. (A) is a schematic perspective view for the principal part description of a lens holder, (b) is a schematic sectional drawing of the lens holder of (a). It is a schematic perspective view of the lens holder for frame replacement. It is a schematic perspective view which shows the state which mounted | wore the ring-shaped gear of the lens holder of FIG. 13 with the lens holder for frame replacement of FIG. H14. FIG. 6 is a side view of the lens suction mechanism shown in FIG. H5. FIG. 20 is a partially schematic exploded perspective view of the lens suction mechanism shown in FIG. H16. It is action | operation explanatory drawing of the lens adsorption | suction mechanism shown to FIG. H16, FIG. It is action | operation explanatory drawing of the lens adsorption | suction mechanism shown to FIG. H16, FIG. FIG. 26 is a side view of the suction jig holding means shown with a part of the movable bracket in FIG. H16 cut away. It is explanatory drawing which showed the adsorption jig holding means of FIG. H16 partially cut along the centerline. (A) is sectional drawing which follows the centerline of the adsorption jig holding means of FIG. H16, (b) is a plan view of the outer cylinder of (a), and (c) is a partial perspective view of the outer cylinder of (b). . (A) is a perspective view of the holder main body of FIG. H22, (b) is a plan view of the holder main body of (a) seen from the cylinder side, (c) is a cross-sectional view along the axis of the outer cylinder of FIG. d) It is sectional drawing when the cylinder part of (a) and the outer cylinder of (c) are fitted. FIG. 23 is a cross-sectional view of the suction jig holding means in a state where the mounting shaft portion of the lens suction jig of FIG. It is a perspective view explaining the latching hook of the suction jig holding means of FIG. It is a front view of the latching hook of FIG. H24. It is sectional drawing which follows the B1-B1 line | wire of FIG. H25. It is a top view of FIG. H25. It is a perspective view which shows the state which has mounted | worn the lens suction jig to the spectacles lens on a lens holder with the suction jig holding means of FIG. It is a fragmentary sectional view which shows the relationship between the suction jig holding means of FIG. H28, a lens suction jig, and a spectacle lens. It is a fragmentary sectional view which follows the B2-B2 line of FIG. H24. It is explanatory drawing explaining an effect | action of the latching hook of FIG. H24 and FIG. 3 is a flowchart of a processing or determination target device (lens grinding processing device, suction jig mounting device) according to the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION 1

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[Constitution]
In FIG. 1, reference numeral 1 denotes a frame shape measurement for reading lens shape information (θi, ρi, Zi) or (θi, ρi) as a lens shape data from the lens frame shape of the spectacle frame F, its template or a template model. A device (lens shape measuring device) 2 is a lens grinding device (ball grinder) for grinding a spectacle lens based on the lens shape data of the spectacle frame input from the frame shape measuring device 1 by transmission or the like. .

  In the following description, for convenience of explanation, lens shape data (θi, ρi, Zi) or lens shape data (θi, ρi), or lens shape data (θi, ρi, Zi) or lens shape data ( Expressions such as θi, ρi) are used, which have the same meaning as the lens shape information (θi, ρi, Zi) or (θi, ρi).

In addition, since a well-known thing can be used for the frame shape measuring apparatus 1, description of the detailed structure, a data measurement method, etc. is abbreviate | omitted. The frame shape (lens frame shape) includes movement amount data Zi in the optical axis direction. However, the lens shape information obtained by measuring the template or the dummy lens does not include movement amount data Zi in the optical axis direction. Becomes (θi, ρi).
<Lens grinding device 2>
This lens grinding apparatus 2 is also used as a processability determination apparatus. As shown in FIG. 1, the lens grinding apparatus 2 includes a processing chamber 4 provided near the front surface of the apparatus main body 3 and a cover 5 that opens and closes the processing chamber 4. Further, as shown in FIG. 2, main processing parts are arranged in the processing chamber 4. In addition, a carriage (not shown) that holds a part of the main processing parts and a driving system (such as a motor) for the main processing parts and carriage are disposed outside the processing chamber 4. The carriage has a U-shape in plan view from a pair of left and right arm portions extending in the front-rear direction and a continuous portion connecting the rear end portions of the arm portions. Further, the carriage is provided with an arm portion that can move left and right and that can move up and down around the rear edge of the continuous portion.

  In FIG. 2, 4a and 4b are side walls of the processing chamber 4, and 4c and 4c are arc-shaped slits formed in the side walls 4a and 4b. A pair of arm portions of the carriage are disposed outside the side walls 4a and 4b. Since the carriage having such an arm portion can adopt a known configuration, detailed description and illustration thereof will be omitted.

Further, the lens grinding apparatus 2 displays the first and second operation panels 6 and 7 used when performing the control operation and data setting operation of the drive system, the operation state by the operation panels 6 and 7 and the like. And a liquid crystal display 8 as a display device (display means).
(Machining main parts)
As shown in FIG. 2, the main parts for processing disposed in the above-described processing chamber 4 include a pair of left and right lens rotation shafts 9 and 10 that extend to the left and right of the apparatus body 3 and pass through the slits 4c and 4c. . The slits 4c and 4c are closed by a cover (not shown) that moves integrally with the lens rotation shafts 9 and 10.

  The lens rotation shafts 9 and 10 are arranged in series with each other and have the same axis, and are rotatably held by the arm portions of the pair of carriages described above. The lens rotation shaft 9 is provided so as to be able to advance and retract with respect to the lens rotation shaft 10. Then, the spectacle lens ML is disposed between the lens rotation shafts 9 and 10, and the lens rotation shaft 9 is advanced to the lens rotation shaft 10 side to hold (hold) the spectacle lens ML between the lens rotation shafts 9 and 10. it can. Further, by operating in the opposite direction, the spectacle lens ML can be removed from between the lens rotation shafts 9 and 10.

  As main parts for processing, a grinding wheel 11 for grinding the spectacle lens ML, a grindstone shaft 12 for rotating the grinding wheel 11, and a chamfering grindstone 13 for chamfering the peripheral portion of the spectacle lens ML. , 14 and a groove cutter (groove grindstone) 17 for grooving the edge surface of the spectacle lens ML.

Furthermore, as main parts for processing, chamfering grindstones 13 and 14, a chamfering shaft (grooving shaft) 15 for rotating a grooving cutter (grooving grindstone) 17, and a turning for driving and turning the chamfering shaft 15. There is an arm 16, a grooving cutter 17 provided on the chamfering shaft 15 adjacent to the chamfering grindstone 14, and an arcuate cover 18 that covers the chamfering grindstones 13, 14 and the grooving cutter 17.

  Further, as the lens rotation shafts 9 and 10, hoses (not shown) that are provided inside the arc-shaped cover 18 and apply grinding water to the grinding wheel surface of the grinding wheel 12, the chamfering grinding stones 13 and 14 or the groove cutter 17. And edge thickness measuring member 19 for measuring the edge thickness Wi of the spectacle lens ML.

  The cover 5 is formed of a single glass or resin panel that is colorless and transparent or colored and transparent (for example, translucent such as a bag), and slides forward and backward of the apparatus body 3.

The processing chamber 4 is provided with a rounded inclined surface 4d that is positioned behind the spectacle lens ML and has a structure in which grinding waste can be easily flowed.
(Drive system for main parts for machining)
As a drive system for the main parts for processing, the above-described carriage (not shown), vertical movement means (not shown in FIG. 2) for rotating the carriage up and down using a drive motor such as a pulse motor, A drive motor (not shown in FIG. 2) such as a pulse motor that moves left and right, a drive motor (not shown in FIG. 2) such as a pulse motor that rotates the lens rotation shafts 9 and 10, and a vertical rotation of the carriage Accordingly, a drive motor (not shown in FIG. 2) for rotating the grinding wheel 11 when the spectacle lens ML held between the lens rotation shafts 9 and 10 is ground is provided.

  Since a well-known configuration can be adopted for the drive motor and the structure for driving the carriage of such a drive system, detailed description thereof is omitted. Further, the grinding wheel 11 includes a rough grinding wheel, a bevel wheel, a finishing wheel, and the like.

  The drive system described above drives the lens rotation shafts 9 and 10 for each angle θi (i = 0, 1, 2, 3,..., N) based on the lens shape information (θi, ρi). And a carriage (not shown) is turned up and down by a drive motor (not shown) to grind the rough grinding wheel 11a of the grinding wheel 11 that rotates the periphery of the spectacle lens ML. At this time, the drive system rotates the front end of the carriage up and down at each angle θi so that the distance between the lens rotation shafts 9 and 10 and the grindstone rotation shaft 12 becomes the grindstone radius + the moving radius ρi at every angle θi. The lens rotation shafts 9 and 10 and the spectacle lens ML are moved up and down. As a result, the spectacle lens ML is roughly ground into lens shape information (θi, ρi) by the grinding wheel 11.

Similarly to the above, the drive system controls the operation of each drive motor based on the lens shape information (θi, ρi), and the peripheral edge of the spectacle lens ML roughly ground into the lens shapes (lens shapes) LL and LR. The edge of the edge can be beveled by the bevel wheel 11b of the grinding wheel 11. At this time, the driving system controls the driving motor that drives the carriage to the left and right based on the preset bevel position data, thereby performing beveling on the edge of the eyeglass lens ML that has been roughly processed into a lens shape. It is like that. 11c is a finishing grindstone of the grinding grindstone 11 having the same shape as the bevel grindstone 11b. In addition, since the grinding process of such spectacle lens ML can employ | adopt a known structure, detailed description is abbreviate | omitted.
(Edge thickness measuring device)
The edge thickness measuring device (edge thickness measuring means) has an edge thickness measuring member 19. The edge thickness measuring member 19 includes a pair of feelers 19a and 19b facing each other in a separated state. The feelers 19a and 19b are integrally provided on a measurement shaft 19c extending in the right direction of operation. The measurement shaft 19c penetrates the side wall 4b of the processing chamber 4 to the left and right and is movable to the left and right. Further, the measuring shaft 19c is held by a spring (not shown) so that the feelers 19a and 19b are located at the approximate center of the rear edge of the processing chamber 4. Accordingly, the feelers 19a and 19b and the measurement shaft 19c are returned to the approximate center of the rear edge of the processing chamber 4 when the moving force in the left-right direction is released.

  Moreover, the edge thickness measuring device (edge thickness measuring means) detects and measures the movement positions (or movement amounts) of the feelers 19a, 19b in the left-right direction in conjunction with the measurement shaft 19c (not shown). Have This measurement unit is provided outside the measurement chamber 4.

  More specifically, the movement positions or movement amounts of the feelers 19a, 19b and the measurement shaft 19c in the left-right direction are read sensors (position detection means or movement amount detection means) (not shown) built in a measurement unit (not shown). Is read.

  Further, the edge thickness measuring device (edge thickness measuring means) includes a driving means such as a pulse motor (not shown) that rotates the measuring shaft 19c about the axis. This driving means is rotated between a position (standby state) where the measuring shaft 19c is rotated and the feelers 19a, 19b are flipped up about 90 degrees (standby state) and a use position (used state) which is tilted horizontally to the front side. ing. This rotation is performed by a control circuit described later.

  When measuring the edge thickness Wi of the spectacle lens ML based on the lens shape information (θi, ρi), the spectacle lens ML is held by the lens rotation shafts 9 and 10 and the feelers 19a and 19b are horizontally tilted forward. To.

  In this state, the lens rotation shafts 9 and 10 are moved up and down and left and right integrally with the carriage by a drive motor, thereby bringing the tip of the feeler 19a into contact with the front refractive surface of the spectacle lens ML or the tip of the feeler 19b. It can be brought into contact with the rear refractive surface.

  Further, the lens rotation shafts 9 and 10 are rotated for each angle θi based on the lens shape information (θi, ρi) while the tip of the feeler 19a is in contact with the front refractive surface of the spectacle lens ML. By moving the carriage up and down so that the inter-axis distance between the rotary shafts 9 and 10 and the grinding wheel 11 (or the grinding wheel rotary shaft 12) becomes Xi (radius of the grinding wheel 11 + radius ρi) for each angle θi. The tip of the feeler 19a can be moved in contact with the moving radius ρi of the front refractive surface of the spectacle lens ML. Similarly, with the tip of the feeler 19b in contact with the rear refractive surface of the spectacle lens ML, the lens rotation shafts 9 and 10 are rotated for each angle θi based on the lens shape information (θi, ρi). The carriage is moved up and down so that the inter-axis distance between the lens rotation shafts 9 and 10 and the grinding wheel 11 (or the grinding wheel rotation shaft 12) becomes Xi (radius of the grinding wheel 11 + radius ρi) for each angle θi. Thus, the tip of the feeler 19b can be moved in contact with the moving radius ρi of the front refractive surface of the spectacle lens ML. When the lens rotation shafts 9 and 10 are rotated based on the lens shape information (θi, ρi) while the feelers 19a and 19b are in contact with the spectacle lens ML, the feelers 19a and 19b are refracted surfaces of the spectacle lens ML. It is moved in the left-right direction according to the curve of.

  Therefore, in order to obtain the edge thickness Wi of the spectacle lens ML, the left-right direction of the front refractive surface of the spectacle lens ML in the lens shape information (θi, ρi) using the feeler 19a (optical axis direction = lens rotation axis 9, 10 The amount of movement (the amount of movement of the feeler 19a in the left-right direction) in the direction in which the axis extends is obtained by a reading sensor (not shown) of the measuring unit. Next, using the feeler 19b, the movement amount (the feeler 19b) of the front refractive surface of the spectacle lens ML in the lens shape information (θi, ρi) in the left-right direction (the optical axis direction = the direction in which the axis of the lens rotation axis 9, 10 extends). Is determined by a reading sensor (not shown) of the measuring unit.

  Here, when the feelers 19a and 19b are in the initial position, the distance from the center position between the feelers 19a and 19b to the tip of the feeler 19a is xa, and the distance from the center position between the feelers 19a and 19b to the tip of the feeler 19b. The distance is -xa, the left and right movements from the initial position of the feeler 19a are fa and -fa, respectively, and the left and right movements from the initial position of the feeler 19b are fb and- Let fb. Under this condition, the lateral movement position Fa of the tip of the feeler 19a from the center position between the feelers 19a and 19b is xa + fa or xa-fa, and from the center position between the feelers 19a and 19b to the left and right direction of the tip of the feeler 19b. The moving position Fb is −xa + fb or −xa−fb.

Accordingly, by subtracting xa from such a movement position Fa, the movement amount fa of the feeler 19a is obtained as a movement position Fa 'in the left-right direction from the center position between the feelers 19a and 19b, and xa is subtracted from the movement position Fb. Thus, the movement amount fb of the feeler 19b is obtained as the movement position Fb ′ in the left-right direction from the center position between the feelers 19a, 19b. Then, by obtaining the difference between the obtained movement positions Fa ′ and Fb ′, the edge thickness Wi of the position corresponding to the lens shape information (θi, ρi) of the spectacle lens ML can be obtained.
(Operation panel 6)
As shown in FIG. 3A, the operation panel 6 includes a “clamp” switch 6a for clamping the spectacle lens by the lens rotation shafts 9 and 10 and designation of processing for the right eye and the left eye of the spectacle lens. "Left" switch 6b for switching display and "right" switch 6c, "grinding wheel movement" switches 6d and 6e for moving the grindstone in the left-right direction, and when the finishing process of the spectacle lens is insufficient A “refinish / trial” switch 6f for refinishing or trial sliding when sliding, a “lens rotation” switch 6g for lens rotation mode, and a “stop” switch 6h for stop mode are provided. .
(Operation panel 7)
As shown in FIG. 3B, 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 “７” 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 at the time of setting related to the processing of the spectacle lens, and are also used for response / selection to a message displayed on the liquid crystal display 8 in the processing step.
(Liquid crystal display 8)
On the upper part of the liquid crystal display 8, a “layout” tab TB1, a “processing” tab TB2, a “processed” tab TB3, and a “menu” tab TB4 are displayed. The display on the liquid crystal display 8 can be switched by selecting the “layout” tab TB1, the “processing” tab TB2, the “processed” tab TB3, and the “menu” tab TB4.

  In addition, function indicators H1 to H6 corresponding to the function keys F1 to F6 are provided at the lower edge of the liquid crystal display 8. The function display portions H1 to H6 are appropriately displayed as necessary. Further, when the function display portions H1 to H6 are in the non-display state, a pattern, a numerical value, or a state different from that corresponding to the function keys F1 to F6 is displayed on the lower edge portion of the liquid crystal display 8. be able to.

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. Further, when the “menu” tab TB4 is selected, it may be displayed as a single menu display area as a whole or as a unique section display area.
The icon displayed in the icon display area E1 is formed on the edge surface of the eyeglass lens when the eyeglass lens edge thickness is measured based on the lens shape information (θi, ρi) which is the lens shape data. A state in which the bevel shape is simulated, a state where the edge of the edge is roughly processed, a state where the edge of the edge is finished, a state where the edge of the edge is mirror-finished, a state where the edge of the edge is grooved, a surface where the edge of the edge is grooved and chamfered State to be machined, groove end chamfering, chamfering, mirror finishing, edge cutting, beveling, edge cutting, beveling, chamfering, edge cutting, beveling, chamfering, mirroring, The eyeglass lenses are arranged side by side corresponding to each work such as the end of the grinding process of the spectacle lens.

  In addition, above each icon, a plurality of cursor indicators that correspond one-on-one and are lit and displayed in accordance with the progress of the series of work so that the operator can identify the progress of the series of work, The right eye lens progress status display and the left eye lens progress status display are provided in the “under processing” tab TB2 in two upper and lower stages.

  In the message display area E2, various error messages and warning messages are displayed according to the state. In the case of a warning message or the like when there is a risk of damage to parts in the apparatus or the lens to be processed, the operator protrudes outside the message display area E2 and is superimposed on the display so that the operator can easily recognize it. It is also possible to make it.

  In the numerical display area E3, when the layout data is input, the geometric center distance (FPD value) of the left and right lens frames of the spectacle frame, the interpupillary distance (PD value) of the eye of the spectacle wearer, the FPD value and the PD value The vertical direction component UP value (or Hlp value) of the shift amount, which is the difference between the two, and each item of the processing size adjustment are displayed. At the initial setting, the suction center of the processing lens is displayed in addition to the FPD, PD, UP, and size described above. Furthermore, when inputting monitor data, numerical values related to dimensions relating to secondary chamfering of the spectacle lens are displayed.

In the status display area E4, the right eye and left eyeglass lens layout images and the bevel shape formed on the middle (arbitrary) edge of the eyeglass lens other than the maximum, minimum, maximum and minimum edges, The side surface shape of the lens viewed from the above, a schematic diagram corresponding to the actual processing state, and the like are displayed.
(function key)
The function keys F1 to F6 are used at the time of setting related to the processing of the spectacle lens, or are used for response / selection to a message displayed on the liquid crystal display 8 in the processing process.

  The function keys F1 to F6 are used as follows at the time of setting related to machining (layout screen). That is, function key F1 is for lens type input, function key F2 is for lens material input, function key F3 is for frame type input, function key F4 is for chamfering type input, function key F5 is for mirror surface input, function Key F6 is used for inputting a machining course.

  The lens type input with the function key F1 includes “single focus”, “ophthalmic prescription”, “progressive”, “bifocal”, “cataract”, “plum”, “8 curve”, and the like. In the spectacles industry, “cataract” generally means a plus lens with a large refractive power, “bottle” means a negative lens with a large refractive power, and “8 curve” means a lens refracting surface. A curve made up of 8 curves.

  The material of the lens to be processed that is input with the function key F2 is plastic (hereinafter abbreviated as “plastic”), “high index”, “glass”, polycarbonate (hereinafter abbreviated as “polyca”), "Acrylic" etc.

  The types of eyeglass frames F that can be input with the function key F3 are “metal”, “cell”, “optil”, “flat”, “grooving (thin)”, “grooving (medium)”, “grooving” (Thick) ”etc.

  The types of chamfering that can be input with the function key F4 are “None”, “Small (front and back)”, “Medium (front and back)”, “Large (front and back)”, “Special (front and back) shown in FIGS. ) ”,“ Small (after) ”,“ middle (after) ”,“ large (after) ”,“ special (after) ”, etc.

  In addition, the pop-up indicating this chamfer position is “None”, “Small (front / rear)”, “Special ear (front / rear)”, “Special nose (front / rear)”, “Special (front / rear)”, “Small (front / rear)” "," Special ears (front and rear) "," special nose (front and rear) "," special (rear) ", etc.

  Examples of the mirror finishing input with the function key F5 include “none”, “present”, “mirror chamfering”, and the like.

  The machining course input by the function key F6 includes “auto”, “trial”, “monitor”, “frame change”, “internal trace”, and the like.

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

  On the function display portions H1 to H6 corresponding to the function keys F1 to F6, a lens type, a lens, a frame, a chamfer, a mirror surface, a course, and the like are displayed. In addition, the function display sections H1 to H6 display the contents corresponding to the lens type, lens, frame, chamfer, mirror surface, course, and the like, that is, the types and processing contents described above for selection by the function keys F1 to F6. The

In the following, the display state of the liquid crystal display 8 at the time of layout, immediately after system startup, immediately after data request, completion of layout setting, selection of each course, etc., or as the display state of the liquid crystal display 8 at the time of processing. Confirmation of thickness, right-eye lens processing and finish, left-eye lens processing, etc. Further confirmation of display status of liquid crystal display 8 after processing, data storage, error icon and cursor / grooving processing during grinding In addition, the display and operation of chamfering, trial cutting, additional refinishing, etc. can be the same as in Japanese Patent Application No. 2000-287040 or Japanese Patent Application No. 2000-290864.
[Control circuit]
The lens grinding apparatus 2 has an arithmetic control circuit 40 as shown in FIG. An arithmetic control circuit 40 having a CPU is connected to operation panels 6 and 7, a ROM 41 as storage means, a data memory 42 as storage means, and a RAM 43, and a correction value memory 44. The liquid crystal display 8 is connected to the arithmetic control circuit 40 through a display driver 45, and various drive motors (pulse motors) 47a to 47n of a drive system are connected through a pulse motor driver 46. The frame shape measuring apparatus 1 of FIG. 1 is connected through the communication port 48.
For example, a drive motor 47a such as a pulse motor that moves the carriage up and down, a drive motor 47b such as a pulse motor that moves the carriage left and right, and a drive motor such as a pulse motor that rotates the lens rotation shafts 9 and 10 are provided. 47c, a drive motor that rotates the grinding wheel 11 is 47d, a drive motor such as a pulse motor that rotates the turning arm 16 up and down is 47e, and a drive motor that rotates the grinding wheel 11 is 47f.

  In this case, the carriage (not shown) can be moved up and down by rotating the drive motor 47a forward or backward, and the carriage can be moved left and right by rotating the drive motor 47b forward or backward. In addition, the lens rotation shafts 9 and 10 can be rotated forward or backward by rotating the drive motor 47c forward or backward. Further, the grinding wheel 11 can be rotationally driven by controlling the operation of the drive motor 47d. Further, by turning the drive motor 47e forward or backward, the turning arm 16 can be driven to turn upward or downward. Furthermore, the chamfering shaft (rotating shaft) 15 can be rotationally driven by controlling the operation of the drive motor 47f. Driving of the drive motors 47 a to 47 f of such a drive system is performed by the arithmetic control circuit 40.

  As shown in FIG. 5, when the processing control circuit 40 reads data from the frame shape measuring apparatus 1 or reads data stored in the storage areas m1 to m8 of the data memory 42 after the machining control is started. , Time-sharing machining control, data reading and layout setting control.

  That is, the period between times t1 and t2 is T1, the period between times t2 and t3 is T2, the period between times t3 and t4 is T3,..., And the period between times tn-1 and tn is Tn-1. Then, machining control is performed during the periods T1, T3,... Tn-1, and data reading and layout setting are controlled during the periods T2, T4,. Therefore, during the grinding of the lens to be processed, the next plurality of target lens shape data can be read and stored, the data can be read and the layout can be set (adjusted), and the data processing efficiency can be greatly improved. be able to.

  The ROM 41 stores various programs for controlling the operation of the lens grinding apparatus 2. The data memory 42 is provided with a plurality of data storage areas.

  The RAM 43 is provided with a processing data storage area 43a for storing data being processed, a new data storage area 43b for storing new data, and a data storage area 43c for storing frame data, processed data, and the like.

As the data memory 42, a readable / writable FEEPROM (flash EEPROM) can be used, or a RAM using a backup power source that prevents the contents from being erased even when the main power source is turned off can be used.
[Action]
Next, the operation of the lens grinding apparatus having the arithmetic control circuit 40 having such a configuration will be described with reference to the flowcharts of FIGS. 11 and 12 and FIGS.
Step S1
When the main power supply is turned on from the start standby state, the arithmetic control circuit 40 is in a state of starting the machining operation. Then, the arithmetic control circuit 40 stands by for reading data from the frame shape measuring apparatus (frame reader) 1.

That is, when the “data request” switch 7c of the operation panel 7 is pressed in step S1, and there is a data request, the arithmetic control circuit 40 receives the lens shape information (θi, ρi, Zi) from the frame shape measuring apparatus 1 or the lens. The data of the shape information (θi, ρi) is read into the data reading area 43b of the RAM 43, and the process proceeds to step S2. The read data may be stored (recorded) in any of the storage areas m1 to m8 of the data memory 42.
Step S2
Then, when the lens shape information (θi, ρi, Zi) or (θi, ρi) data is read, the arithmetic control circuit 40 displays the display contents for layout setting shown in FIG. 6 on the liquid crystal display 8. Then, the process proceeds to step S3.
<Layout display of liquid crystal display 8>
At the time of layout setting, the contents of normal chamfering processing as shown in FIG. 6 are displayed on the liquid crystal display 8 by the arithmetic control circuit 40. That is, in the display area E2 of the liquid crystal display 8, "lens: plastic" and "course: auto" are displayed, and a bevel and chamfering display 20 is displayed. In the display area E3, the frame geometric center distance FPD, the interpupillary distance PD of the spectacle wearer, the shift amount UP, the size “SIZE”, and their numerical values are displayed. In FIG. 6, FPD is 72.5, PD is 64.0, UP is +2.0, and SIZE is +0.00 as specified values (standard values). In the display area E3, “adsorption position: optical center” is displayed below “SIZE”.

  Further, the right lens shape LR and the lens suction plate Rs are displayed in a superimposed manner on the left side of the display area E4, and the left lens shape LL and the lens suction plate Ls are displayed in a superimposed manner on the right side of the display area E4. At this time, the optical center OR of the lens shape LR and the center of the lens suction plate Rs are matched, and the optical center OL of the lens shape LL and the center of the lens suction plate Ls are matched.

  Further, on the function display portions H1 to H6, a lens type, a lens, a frame, a chamfer, a mirror surface, a course, and the like are displayed, respectively. Further, for example, “single focus” is displayed on the function display unit H1, “pula” is displayed on the function display unit H2, “metal” is displayed on the function display unit H3, and the function display unit H4 displays. For example, “small (front and back)” is displayed, “yes” is displayed on the function display portion H5, and “auto” is displayed on the function display portion H6, for example.

  When the function key F4 corresponding to the function display portion H4 is pressed, a pop-up menu 21 as shown in FIGS. 7 and 8 is displayed. This pop-up menu 21 includes “none, small (front / rear), middle (front / rear), large (front / rear), special (front / rear), small (rear), middle (rear), large (rear), special (rear)”. The selected contents of the chamfer position such as are displayed. In this display state, “None, small (front / rear), middle (front / rear), large (front / rear), special (front / rear), small (rear), middle (rear), large (rear), special (rear)”, etc. Either color of the chamfer position is highlighted. The reversely displayed content is the chamfering position and is displayed on the function display portion H4. In FIG. 7, “small (front and rear)” is displayed as the chamfering position.

  The reverse display for this chamfering position is “None”, “Small (front / rear)”, “Medium (front / rear)”, “Large (front / rear)”, “Special (front / rear)”, It is executed in order for “small (back)”, “middle (back)”, “large (back)”, “special (back)”, and the like.

  When “special (front / rear)” is selected with the function key F4, as shown in FIG. 8, “special (front / rear)” is highlighted on the function display section H4, and the process proceeds to a special chamfering course. Even if “Special (after)” is selected, the course shifts to a special chamfering course. Further, the chamfered trajectories 31R and 31L after the chamfering are displayed on the target lens shapes LR and LL. In this case, the chamfering locus is displayed with standard values such as a chamfering width of 2.0 mm, a chamfering range of 80%, etc.

“Small (front / rear)”, “middle (front / rear)”, and “large (front / rear)” indicate the size of the chamfering width (small, medium, large) in normal chamfering and the spectacle lens ML. This means the chamfered part (front side, rear side) of the edge. The same applies to “small (rear)”, “middle (rear)”, and “large (rear)”, and the size of the chamfering width (small, medium, large) in normal chamfering and the spectacle lens ML. This means the chamfered part (rear side) of the edge. In the “special (front / rear)”, the eyeglass lens position (hereinafter referred to as the ear side) of the eyeglass frame is chamfered at the edge of the front and rear refractive surfaces of the eyeglass lens ML. Or a chamfering process at a spectacle lens position (hereinafter abbreviated as the nose side) located on the nose pad (pad) side. Further, in the “special (rear)”, there is no chamfering at the edge of the front refractive surface of the spectacle lens ML, and chamfering on the ear side or the nose side of the chamfering at the edge of the rear refractive surface. means.
Step S3
<Layout input>
In step S3, the frame geometric center distance FPD, the inter-pupil distance PD, and the shift are made using the “▽” switch 7e for moving the cursor type pointer and the seesaw type “− +” switch 7d used for numerical input. Enter the amount UP, SIZE (or size), etc.

And the control circuit 40 complete | finishes this input and transfers to step S4.
Step S4
<Processing condition input>
In this step S4, using the function keys F1 to F6 and the “▽” switch 7e for moving the cursor pointer, the lens type, lens (lens material), frame (frame material), chamfer, mirror surface, Input (select) layout conditions such as the position of the course and the suction position of the lens suction jig on the spectacle lens.

The arithmetic control circuit 40 then proceeds to step S5 after completing the input (selection) of such layout conditions.
Step S6
In step S6, the arithmetic control circuit 40 displays the layout screen of FIG. 13 and waits. In FIG. 13, a frame 50 for inputting a frame warp angle is displayed in the display area E2, and a lens (lens material), a course, and the like are displayed. Further, “frame warp angle” is displayed in the frame 50.

In this state, the frame warp angle is input into the frame 50 using the seesaw type “− +” switch 7d. In FIG. 13, the frame warp angle is input as + 5.5 °. The arithmetic control circuit 40 then proceeds to step S7 after the input of the frame warp angle has been completed.
Step S7
In this step S7, when the “clamp” switch 6a for lens clamping and the “left” switch 6b or “right” switch 6c for starting machining are operated, the arithmetic control circuit 40 displays the “processing” tab TB2. Display, and the process proceeds to step S8.

Incidentally, after the spectacle lens ML is disposed between the lens rotation shafts 9 and 10, the “clamp” switch 6a is pressed to hold the spectacle lens ML between the lens rotation shafts 9 and 10 as shown in FIG.
Step S8
In this step S8, the arithmetic control circuit 40 uses the edge thickness Wi of the position corresponding to the lens shape information (θi, ρi) of the spectacle lens ML as the lens edge measurement data, and the edge thickness measurement member of the edge thickness measuring device (not shown). 19 is used for preliminary measurement, and the process proceeds to step S9.

Note that the measurement of the edge thickness Wi has been described in the description of the above-described configuration (edge thickness measuring apparatus), and thus detailed description thereof is omitted here.
Step S9
In step S9, the arithmetic control circuit 40 executes PD correction when the frame warp angle is input in the frame 50 of the layout screen of FIG. 13, and proceeds to step S10.

  Here, PD correction refers to calculating the lens protrusion amount of the front refractive surface (lens front surface) of the spectacle lens ML from the frame warp angle θ and lens edge measurement data (Wi), and using the calculated lens protrusion amount, This is an operation for correcting the PD value obtained in a planar manner from a plate or a demo lens to the PD value of glasses having a frame warp angle θ.

Hereinafter, as the PD correction calculation method, two methods that differ in the method of obtaining the lens protrusion amount will be described.
(A) A method for obtaining a lens protrusion amount by calculating a curve in front of the lens. (B) A method for obtaining a lens protrusion amount from two surface data in the frame horizontal reference direction.
<(A) Method for Determining Lens Protrusion by Calculation of Lens Front Curve>
In the preliminary measurement in step 8, the front curve of the lens is obtained from the four points of the edge position data of the front refractive surface (lens front surface) of the spectacle lens ML obtained by measuring the position matching the final frame processing shape. Further, by measuring the movement in the radial direction, the lens front curve can be obtained from two points on the radial direction.

In FIG. 14, the data desired to be obtained when the projection correction is performed from the frame warp angle θ and the lens front curve is the shift amount DCN in the direction along the plane formed by the lens opening. DCN is clear from FIG.
DCN = DCT + DCH (1)
As required. DCT uses the frame geometric center distance FPD and the interpupillary distance PD.
DCT = [(FPD−PD) / 2] / cos θ (2)
It becomes.

  Next, DCH is obtained as a value obtained by multiplying the distance between the arc and each straight line intersection by sin θ.

Since the arc indicating the lens surface passes through the two points (0, 0) (BWX cos θ, BWX sin θ),
The center coordinates (A, B) of the arc are expressed by the following equations.
A = −tan θ × B + BW / (2 × cos θ)
B = BWXsin θ ± [BW ² × (sin θ) ² − {BW ² −4R ² × (cos θ) ² }] / 2
Moreover, the equation of the straight line representing the aperture reference plane is Y = tan θ × X (4)
Furthermore, the equation of the straight line representing PD (visual axis) is
X = (PD-DBW) / 2 (5)
It becomes.
The Y coordinate value of the intersection of the straight lines in equations (4) and (5) is
Y ₄₅ = (PD−DBW) × tan θ / 2
In addition, the Y coordinate value of the intersection of the circle and the straight line in equations (3) and (5) is
Y ₃₅ = ± [R ² − [(PD−DBW) / 2−A] ² ] + B
It becomes. DCH is obtained by multiplying the difference between these Y coordinate values by sin θ, and DCH = (Y45−Y35) × sin θ.
It becomes.
<(B) Method of obtaining lens protrusion amount from two surface data in the frame horizontal reference direction>
DCN needs to be obtained as in the case of (A), but DCH is obtained from the front surface measurement value in the horizontal direction of the lens and the prediction of the lens apex in consideration of the lens mounting state.

  Here, as shown in FIG. 15, a large-diameter shaft portion 10a is provided at the end of the lens rotation shaft 10, and a shaft holding hole 10b is provided in the large-diameter shaft portion 10a. The cup receiver Cr has a cup receiver main body Cra and a double-sided tape T, and the cup receiver main body Cra has a shaft portion Crb and a tape mounting portion Crc integrated with the shaft portion Crb. The shaft portion Crb is fitted with the shaft portion Crb of the shaft holding hole 10b, and the tape mounting portion Crc protrudes from the end surface of the large-diameter shaft portion 10a. And the double-sided tape T is affixed on the end surface of the tape attachment part Crc. The lens surface (front refracting surface) Sf of the spectacle lens ML to be measured is adhered to the surface of the double-sided tape T and held by the cup receiver Cr.

  Further, since the lens measurement reference is the end face of the cup receiver Cr (end face of the double-sided tape T) as shown in FIG. 15, all measured values are obtained with this position as a reference. In the cup receiver Cr, the lens (glasses lens ML) is held on the cup body Cra via the double-sided tape T. This lens holding position is considered to be a substantially fixed position regardless of the lens to be held.

  The lens holding position is defined as the tape mounting portion Crc of the cup body Cra and the thickness Tc of the double-sided tape T. The lens apex position is predicted using the inclination between the lens holding position and the actual measurement position.

  That is, as shown in FIG. 15, a straight line La that connects the radial end Sa of the cup receiver Cr and the lens measurement position Sb and bisects this is considered, and the intersection of the straight line La and the lens axis center line Oa. Consider Ob.

If these two points (radial end portion Sa, lens measurement position Sb) are two points on the lens spherical surface, a bisector (straight line) of a line (inclined line) Lb connecting the two points (Sa, Sb). La) is a variable for considering this passing through the center (curvature center) Oc of the spherical surface of the lens surface (front refractive surface (front surface)) Sf of the spectacle lens ML passing through two points (Sa, Sb). Set as follows. For example, in FIG.
row_msr Radius of measurement position ρ Sample data 35
rds_cphldr Radius sample data of cup holder Cr 12.5
thck_cp Thickness of cup and double-sided tape Tc １．２ 1.2
thck_row measured value ４．５ 4.5
tp_lns Lens vertex position 〃 0.723105
And When the measured value is smaller than the predicted value of the thickness of the cup body Cra and the double-sided tape T, the center Oc is the front side of the lens front surface (front refractive surface of the spectacle lens ML), resulting in an error.
The slope tilt of the slope line Lb connecting the two points (Sa, Sb) is
tilt = (row_msr-rds_cphldr) /
(Thck_row-thck_cp)
Can be obtained from
Further, the intersection of a line (inclined line) Lb connecting two points (Sa, Sb) and a bisector (straight line La) passes through Sc, passes through a point (Sa) on the radius of the cup receiver Cr, and is centered on the lens axis. Lp is a parallel virtual line parallel to the line Oa, Lv is a vertical virtual line perpendicular to the parallel virtual line Lp and the lens axis center line Oa from the intersection Sc, a parallel virtual line Lp of the vertical virtual line Lv and the lens axis center line Oa Assuming that the intersections with are Sd and Se, respectively, the triangle connecting the points (Sa), Sc and Sd and the triangle connecting the points Sc, Sd and the center Oc are similar. Considering the ratio of the similar triangles, the distance lngtgl from the intersection Se on the lens axis center line Oa to the center Oc is
lntgl = (row_msr + rds_cphldr) / 2 /
tilt
Can be obtained as
Since the intersection Sc of the inclined line Lc connecting the two points (Sa, Sb) is half of the inclined line Lc, the distance (length) L0 from the point (Sa) on the radius of the cup receiver Cr to the intersection Sd Is
L0 = (thck_row-thck_cp) / 2
It becomes. ,
The distance (length) ngth2 from the double-sided tape T to the center Oc on the lens axis center line Oa is the distance (length) L0 from the point (Sa) on the radius of the cup receiver Cr to the intersection Sd, A value obtained by adding a distance (length) lngtgl from the intersection Se to the center Oc.

Accordingly, the distance (length) ngth2 is
length2 = length1 + L0
= (Row_msr + rds_cphldr) / 2 / tilt + (thck_row-thck_cp) / 2
It becomes.
-Lens radius The radius (rds_lns_frnt) of the lens (glass lens ML) is

... (1)
As required.
Lens top position Furthermore, the lens top position tp_lns is
tp_lns = thck_cp + Lngth2 −rds_lns_frnt
-Height from measurement plane hght = thck_row-tp_lns
Note that sample data such as length2, lens radius, lens apex position, height from the measurement plane, etc. is given as an example below. Sample data 163.5818
Lens radius Sample data 164.0587
Lens apex position Sample data 0.723105
Height from measurement plane Sample data 3.776895
Finally, a numerical value obtained by adding the average bevel position (1.5 mm) to the height data and multiplying by the sin of the frame inclination angle becomes the PD correction value. In addition, it is necessary to double because it is for both eyes. The above concept is applied to two points in the horizontal direction, and the position of the lens apex is obtained as the average value.

  Moreover, when calculating | requiring the height from the lens front surface, it can also be set as the average value of the height of 2 points | pieces.

  The above is a method for obtaining the amount of shift based on the geometric center, but a lens corresponding to a high curve frame having a frame curve of a spectacle lens frame of +5 curve or more, that is, about +6 curve or +8 curve is processed. Sometimes, during the measurement of the fabric lens, in the raw judgment of the fabric lens diameter and the shape of the target lens, an error occurs due to insufficient grinding cost of the raw lens, or the fabric lens has a grinding cost There is a possibility that processing may be performed with a shortage, and that bevel formation cannot be performed normally. That is, the PD correction calculation requires the lens front curve value obtained by the lens edge measurement. Therefore, after the processing is started, the first lens measurement (bevel apex position) is executed, and the lens front curve value is calculated for the first time. PD correction was performed. Since the PD correction amount obtained in the first round measurement is taken into consideration for the next second round measurement (the bevel shoulder position), the curvature of the frame is strong in the case of a high curve frame, and the lens used also has a curve. Since it is deep, there are cases where the vicinity of the first round or the outside of the first round is measured. And if it is close to the inside of the 1st round, the lens measurement of the 2nd round will be cleared, and after processing, the bevel formation will be incomplete due to insufficient fabric, and it will not be able to fit into the frame frame, so it will be the worst failure processing May lead to On the other hand, in the case of the outer side from the first round, there is a possibility that the lens sensor may come off at the ear side during the second round measurement, resulting in a measurement error. In this case, it is necessary to prepare a fabric lens of a necessary diameter and start over from the centering operation.

  Therefore, a suction jig (lens suction jig) is attached to the spectacle lens ML with reference to the geometric center and the optical center position, and the spectacle lens ML is attached to the lens grinding apparatus using the suction jig as shown in FIG. When the eyeglass lens ML is ground with the grinding wheel 11 of the lens grinding apparatus 2, the unprocessed circular eyeglass lens (fabric lens) ML has a high curve. However, it is desirable to determine whether or not the grinding wheel 11 interferes with the suction jig (lens suction jig) to realize accurate grinding.

By correcting the method of calculating the amount of shift based on the optical center (eyeglass wearer's eye, optical axis) as follows, the geometric center reference shift amount calculation method is modified as follows. A lens that obtains accurate grinding by determining the amount of correction with respect to the axis) and attaching a suction jig to the high-curved fabric lens based on the optical center position, and making a sufficient unprocessed judgment. The grinding device 2 can be obtained. A specific method for calculating the correction amount in this case will be described below using a program operator.
[I]. When grinding the spectacle lens into a target lens shape by aligning the center of the lens shape (center of the box) with the center of the lens suction jig (center), the amount of correction based on the center of the geometry (correction correction) (Quantity). A calculation method for correcting the shift amount will be described with reference to FIG.

The amount of offset (the amount of eccentricity) h is
h = (FPD-PD) / 2
It can be expressed as.

So DCT
DCT [box] = h / cosθ (2)
About DCH
The spherical surface and each straight line are replaced with the above formulas to obtain the intersection. This spherical (circle) equation is
(XA) ^ 2 + (YB) ^ 2 = R ^ 2 (3)
It becomes. This circle passes through the two points a (0,0) and b (BW * cosθ, BW * sinθ).
A ^ 2 + B ^ 2 = R ^ 2 ... (i)
(BW * cosθ-A) ^ 2 + (BW * sinθ-B) ^ 2 = R ^ 2 (ii)
Since the following two equations hold, solving for A and B,
A = −tanθ * B + BW / (2 * cosθ)
B = (BW * sinθ ± √BW ^ 2 * (sinθ) ^ 2- {BW ^ 2-4 * R ^ 2 * (cosθ) ^ 2})) / 2
Is obtained. In addition, the straight line expression representing the aperture reference plane is
Y = tanθ * X (4)
And the straight line expression for PD (visual axis) is
X = (BW / 2) * cosθ −h (5)
It becomes. And the coordinate value of the intersection P2 (X # p2, Y # p2) of the two straight lines (4) and (5) is
X # p2 = (BW / 2) * cosθ−h (iii)
Y # p2 = X # p2 * tanθ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ (iV)
As obtained. In addition, the coordinate value of the intersection Pi (X # pi, Y # pi) between the circle (3) and the straight line (5) is
X # pi = Xp2 = (BW / 2) * cosθ−h (V)
Y # pi = ± √ (R ^ 2- {X # pi-A} ^ 2) + B (Vi)
As obtained. Also, the distance hight between P3 and Pi is
hight [box] = (Y # p2-Y # pi) * cosθ (Vii)
It becomes. Furthermore, DCH when considering the position yg
DCH = (hight [box] + yg) × tan (θ) (Viii)
It becomes. Also, the eccentricity when the machining axis is aligned with the center of the BOX is
N DCN [box] = DCT [box] + DCH [box] ... (iX)
It becomes.
[II]. When the spectacle lens is ground into a lens shape by aligning the axis (center) of the lens suction jig with the optical center of the spectacle lens that matches the eye axis of the spectacle wearer's eye, the amount of shift based on the optical center Calculate the correction amount. A calculation method for correcting the shift amount will be described with reference to FIG.

The equation of a straight line passing through two points, the center coordinate C of the circle and the PD position coordinate Pi on the circumference, is
Y = a1 * X + b1 (6)
It becomes. Where a1 and bl are slopes a1 = (BY # pi) / (AX # pi))
Intercept b1 = Y # pi-a1 * X # pi
It is. Also, X # p1, Y # p1 of BOX center coordinates P1 (X # p1, Y # p1) orthogonal to the straight line (6) on the frame warp plane is
X # p1 = (BW / 2) * cosθ
Y # p1 = (BW / 2) * sinθ
And the equation of the straight line passing through the BOX center coordinate P1 (X # p1, Y # p1) is
Y =-(1 / a1) * X + b2 (7)
It becomes. Where b2 is
Intercept b2 = Y # p1 + a1 * X # p1
It is. Also, the X # p2 ', Y # p2' coordinates of the intersection P2 '(X # p2', Y # p2 ') of the two straight lines (5), (7) are
X # p2 '= X # p2
Y # p2 '=-(1 / a1) * X # p2' + b2
It is. Further, the distance between the intersection points P1 and P2 ′ is DCT. The distance DCT between the intersection points P1 and P2 'is
DCT [opt] = √ {X # p2'-X # p1) ^ 2 + (Y # p2'-Y # p1) ^ 2}
It becomes. Furthermore, the coordinates X # p3 ', Y # p3' of the intersection point P3 (X # p3 ', Y # p3') of the two straight lines (6), (7) are
X # p3 '= (b2-b1) / (a1 + 1 / a1)
Y # p3 '= a1 * X # p3' + b1
It becomes. The distance between the intersections P2 ′ and P3 ′ is DCH. The distance DCH between the intersections P2 'and P3' is
DCH [opt] = √ {X # p3'-X # p2 ') ^ 2+ (Y # p3'-Y # p2') ^ 2}
It becomes. Also, the distance hight between P3 'and Pi is
hight [opt] = √ {X # p3'-X # pi) ^ 2 + (Y # p3'-Y # pi) ^ 2}
It becomes. Furthermore, the lens cut surface inclination angle δ is
θ-δ = ATAN (DCH [opt] / hight [opt])
δ = θ-ATAN (DCH [opt] / hight [opt])
δ is positive when inward and negative when outward.

Finally, considering the position of the dirt,
DCH = (hight [opt] + yg) × tan (θ-δ)
Ball width size correction amount Δbw (diameter) during optical center processing
(Must be done before circumference correction)
Δbw = BW−BW * cosδ
= BW * (1−cosδ)
The amount of eccentricity when the machining axis is aligned with the optical center is
∴ DCN [opt] = DCT [opt] + DCH [opt]
Thereby, the accuracy of the protruding amount of the lens can be increased.

  In addition, the diameter of the spectacle lens that can be processed can be obtained from the amount of shift (eccentric amount) obtained by the above calculation method, and numerical values such as the amount of shift and the minimum diameter that can be processed can be displayed on the screen.

  FIGS. 18 and 19 show a circular unprocessed fabric lens (glasses lens) on the liquid crystal display (display device) 8 of the lens grinding apparatus 2 and a lens shape (frame shape display) on the fabric lens. MLa and the suction jig shape Sa of the lens suction jig are superimposed and displayed.

  FIG. 18 shows a layout display when the eyeglass lens frame is attracted based on the geometric center. The amount of shift at this time is obtained by the above-described calculation method.

FIG. 19 is a layout display in the case of attracting with reference to the pupil center (optical center) of the spectacle wearer's eye. The amount of shift at this time is obtained by the above-described calculation method.
Step S10
In step S10, the arithmetic control circuit 40 performs the main measurement of the edge thickness of the spectacle lens based on the correction data obtained by the PD correction calculation in step S9, and proceeds to step S11. Also in this measurement, the edge thickness Wi of the spectacle lens ML is measured using the edge thickness measuring member 19 of the edge thickness measuring device (not shown) as in step S8, and the process proceeds to step S11. Note that the measurement of the edge thickness Wi has been described in the description of the above-described configuration (edge thickness measuring apparatus), and thus detailed description thereof is omitted here.
Step S11
In step S11, the arithmetic control circuit 40 displays a bevel simulation screen as shown in FIG.
[Simulation screen for beveling and chamfering]
<Display of edge of eyeglass lens and bevel shape of edge>
In this step S11, in the case of the simulation for the beveling process, the edge thickness shape (lens shape) of the unprocessed spectacle lens is determined based on the lens shape information (θi, ρi, Zi) which is the lens shape information. After measuring with the edge thickness measuring device (edge thickness measuring means) having the thickness measuring member 19, the shape of the edge end portion including the hem portion (or the bevel shoulder portion) of the bevel crest Y is as shown in FIG. It is displayed on the simulation screen of the liquid crystal display 8.

  When the chamfering operation for the spectacle lens for the left eye is performed on the simulation screen after the display for special chamfering is executed as shown in FIG. Select "Monitor" from "Trial", "Monitor", "Change Frame", "Internal Trace", etc., and then press the "Left" switch 6b to start machining.

  10, in the display area E2 of the liquid crystal display 8, the “face width”, “ear side width”, “ear side range”, “nose side width”, “nose side range” of the eyeglass lens for the left eye are displayed. Is displayed. For example, the “surface width” is 0.5 (mm), the “ear side width” is 5.0 (mm), the “ear side range” is 30 (%), and the “nose side width” is 0.5 (mm). ), 10 (%), etc. are displayed as the “nose side range”. In addition, a “frame curve” and a “bevel curve” are displayed below the display area E3 (data input unit).

  Further, on the left side of the display area E4, a left eye mark L, a lens shape LL for the left eye, an optical center OL of the lens shape LL, a geometric center BO of the lens shape LL, an upper lens width LLu, a lower lens width LLd, The right lens width LLr, the left lens width LL1, a special chamfer position mark Stc used also as a mark (target) indicating an arbitrary position, and a chamfer position mark Sfc indicating the position where the edge thickness and the chamfer width are the thinnest are displayed. Is done.

  In addition, in the upper right part of the display area E4, the cross-sectional shape 32 of the edge portion including the bevel shape in the chamfering position mark Sfc of the lens shape LL is displayed first, and for example, the bevel apex “Top: 1.0 [0.9] "and" Edg: 4.0 [4.0] "are displayed first. At the same time, the cross-sectional shape 33 of the edge at the special chamfering position mark Stc in the ear-side horizontal direction of the lens shape LL is first displayed at the lower right part of the display area E4, and for example, the bevel apex “Top: 1 .3 [1.2] "and" Edg: 6.8 [6.3] "and" Remaining width: 2.2 [2.3] "are displayed first.

  In addition, “position” is displayed on the lower edge of the liquid crystal display 8 corresponding to the function display H1, and “rotation” is displayed corresponding to the function display H2, corresponding to the function display H4. “Chamfer” is displayed, “Mirror surface” is displayed corresponding to the function display portion H5, and “Return” is displayed corresponding to the function display portion H6. Here, Y indicates a bevel mountain of the lens shape LL.

  Further, a pointer 34 extending to the special chamfer position mark Stc with the optical center OL of the lens shape LL as a center is displayed on the lens shape LL. When the function key F2 is pressed, the pointer 34 and the special chamfering position mark Stc move in the clockwise direction ("-" direction) on the lens shape LL as indicated by an arrow 35 shown in the function display portion H2. It has become. Further, when the function key F3 is pressed, the pointer 34 and the special chamfer position mark Stc move in the counterclockwise direction (“+” direction) on the lens shape LL as indicated by an arrow 36 shown in the function display portion H3. It is like that. As the pointer 34 and the special chamfering position mark Stc move, the state of the chamfered portion 37 at the moving position is displayed on the lower right side. For example, when the pointer 34 and the special chamfering position mark Stc move to the chamfering position mark Sfc side by this movement, the state of the chamfered portion 37 changes as indicated by a broken line.

  In the normal simulation screen, “size” is displayed at the bottom of the display area E3 (data input unit).

Further, in the case where the bevel hem is extremely narrow and the chamfer width cannot be sufficiently obtained in the spectacle lens after the bevel processing, or the edge thickness is extremely narrow and only the bevel ridge is formed, the bevel ridge and the bevel rim are formed. When chamfering over the skirt, the condition of “bite-in” control can be obtained on the simulation screen.
<Optical center reference processing availability determination>
The suction cup is mounted on the basis of the optical center based on the shift amount based on the optical center obtained by the calculation method described above. A suction jig mounting device described later is used for mounting the suction cup.

  In FIG. 20, an unprocessed fabric lens is disposed on the mounting table of the suction jig mounting device, and the suction cup Sab is mounted on the optical center (optical axis) of the fabric lens. δ is an angle formed by the geometric center axis of the processed lens and the optical center axis.

  FIG. 21 shows a frame shape display (lens shape MLa) and an attachment axis of the suction jig shape on the liquid crystal display 8 of the lens grinding apparatus 2 of FIG. 1 or the liquid crystal display panel (liquid crystal display) of the suction jig mounting device. The arrangement state when the portion Sa ′ and the fabric lens are displayed in an overlapping manner is shown.

And the simulation when mounting | wearing with a suction cup is represented like FIG. Thereby, it is possible to check in advance whether the cup mark (suction jig shape Sa) of the suction cup (lens suction jig) does not protrude from the target lens shape MLa, and the lens rotation shaft 9 that holds the spectacle lens ML is checked. , 10 and the grinding wheel 11 (grinding wheel shaft) can cause the occurrence of machining interference.
<Determining whether machining is possible based on geometric center>
Similarly, a suction cup (lens suction jig) can be mounted on the spectacle lens by a suction jig mounting device to be described later based on the shift amount based on the geometric center position of the target lens shape MLa. 23 to 25 are explanatory diagrams of the amount of shift based on the geometric center position.

  In FIG. 23, an unprocessed fabric lens is disposed on the mounting table of the suction jig mounting device, and the suction cup Sab is mounted on the optical center (optical axis) of the fabric lens. δ is an angle formed by the geometric center axis of the processed lens and the optical center axis.

  On the liquid crystal display 8 of the lens grinding apparatus 2 of FIG. 1 or the liquid crystal display panel (liquid crystal display) of the suction jig mounting apparatus, as shown in FIG. The target lens shape Mla input from the frame shape measuring apparatus 1 in FIG. 1 and the like and the attachment shaft portion Sa ′ having a suction jig shape are superimposed and displayed.

  A simulation when the suction cup is mounted is expressed as shown in FIG. This makes it possible to check in advance whether the suction cup mark (suction jig shape Sa) does not protrude from the target lens shape MLa, and the lens rotation shafts 9 and 10 that sandwich the spectacle lens ML of FIG. It is possible to prevent the occurrence of machining interference that causes a collision with the grindstone 11 (grindstone shaft).

  Further, it is possible to recognize a deviation between the suction position based on the geometric center position and the suction position based on the optical center position.

Further, as shown in FIG. 26, even in the case of the simple suction jig mounting device (Japanese Patent Application No. 2009-224367) of FIG. The suction cup can be mounted by a suction jig mounting device based on the amount of shift based on the geometric center position of the mold shape. In addition, the code | symbol of FIG. 26 shows the code | symbol in Japanese Patent Application No. 2009-224367 as it is.
<For processed lens suction>
In the case of the processed lens as shown in FIG. 27, the fabric lens as shown in FIG. 28 is placed on the liquid crystal display 8 of FIG. 1 or the liquid crystal display panel (liquid crystal display) of the suction jig mounting device. And the target lens shape MLa input from the frame shape measuring apparatus 1 or the like are superimposed and displayed.

  A simulation when the suction cup is mounted is represented as shown in FIG. This makes it possible to check in advance whether the mark (suction jig shape Sa) of the suction cup (lens suction jig Sab) does not protrude from the target lens shape MLa, and the lens that holds the eyeglass lens ML in FIG. The occurrence of machining interference that causes the rotary shafts 9, 10 and the grinding wheel 11 (grinding wheel shaft) to collide with each other can be prevented.

  The height in the vertical direction from the lower rim of the target lens shape to the pupil position, that is, the height HIP directly under the PD, the minimum lens diameter required for processing, etc. can be easily checked, and processing interference can be prevented in advance. .

FIG. 30 is an explanatory diagram showing the frame warp angle of the spectacle frame F, the curves of the spectacle lenses ML (L) and ML (R), PD, FPD, and eccentricity.
<Rough grinding and beveling>
In step S11, when the simulation operation is not performed, by selecting “auto”, the arithmetic control circuit 40 shifts to rough grinding. However, the display during processing is a simulation screen.

  If rough grinding is to be executed, the "left" switch 6b is pressed again in step S11 to start.

  The arithmetic control circuit 40 controls the drive motor 47d to rotate and drive the grinding wheel 11, while the inter-axis distance between the lens rotation shafts 9 and 10 and the grinding wheel rotation shaft 12 is different for each angle θi (grinding wheel radius). The carriage motor (not shown) is moved up and down by rotating the drive motor 47a forward or backward based on the lens shape information (θi, ρi) so that the moving radius ρi) becomes equal to the moving radius ρi). The lens rotating shafts 9 and 10 and the spectacle lens ML are moved up and down by moving the front end of the carriage up and down at every angle θi. As a result, the spectacle lens ML is roughly ground into the lens shape information (θi, ρi) by the grinding wheel 11.

  In this way, the arithmetic control circuit 40 performs rough grinding on the periphery of the spectacle lens ML based on the lens shape information (θi, ρi).

  Further, the arithmetic control circuit 40 controls the operation of the drive motors 47a and 47d based on the lens shape information (θi, ρi) in the same manner as described above, and is roughly ground into the lens shapes (lens shapes) LL and LR. The bevel crest Y is ground by the bevel wheel 11b of the grinding wheel 11 at the edge of the edge of the spectacle lens ML, and the process proceeds to step S13. Yt is the bevel apex of the bevel mountain portion Y.

At this time, the arithmetic control circuit 40 controls the driving motor 47b that drives the carriage left and right based on the bevel position data set in advance, so that the edge of the spectacle lens ML roughly processed into a target lens shape is beveled. Apply processing. In planar processing, edge position data on the front surface of the lens is used as the bevel position data. This bevel position data (or front edge position data) is used as lens shape information (θi, ρi) of the front refractive surface fa or rear refractive surface fb of the eyeglass lens ML obtained when measuring the edge thickness of the eyeglass lens ML. It is obtained from the refractive surface position data in the axial direction of the measurement axis 19c at the corresponding position (see FIG. 14).
Step S13
<Finish processing>
Further, after such rough grinding and beveling are finished, the arithmetic control circuit 40 chamfers the edge of the spectacle lens ML with the chamfering grindstones 13 and 14 and grinds the peripheral edge of the spectacle lens ML. Finishing with the finishing grindstone 11c of the grindstone 11 is completed.

  As described above, the lens grinding method according to the embodiment of the present invention grinds the spectacle lens ML based on the lens shape data of the dummy lens of the rimless frame and the lens shape data of the spectacle lens. In addition, in this lens grinding method, the numerical value of the warp angle of the rimless frame is inputted and the spectacle lens is ground.

  According to such a lens grinding method, for example, even in a spectacle lens such as a convex lens or a concave lens having a curvature of 8 curves, a special lens such as a lenticular lens, PD correction in accordance with the prescription (PD value) of the spectacle wearer It is possible to provide glasses that match the spectacle wearer.

  The lens grinding apparatus according to the embodiment of the present invention grinds the spectacle lens ML based on the lens shape data of the rimless frame and the lens shape data of the spectacle lens ML. In addition, this lens grinding apparatus has an input means (“− +” switch 7 d) for inputting the numerical value of the warp angle of the rimless frame, and a grinding means (grinding wheel 11) for grinding the spectacle lens ML. .

  According to such a lens grinding apparatus, even in the case of a rimless frame without a frame frame or a spectacle frame such as a wire frame such as Nyroll, the spectacle lens is ground with a warp angle (inclination angle) that matches the preference of the spectacle wearer. And glasses can be provided. Even a beginner can easily carry out numerical input. Further, for example, even in a spectacle lens such as a convex lens having a curvature of 8 curves, a concave lens, or a special lens such as a lenticular lens, PD correction can be performed according to the prescription (PD value) of the spectacle wearer. It is possible to provide eyeglasses that match the person.

  Further, the PD correction method according to the embodiment of the present invention corrects the interpupillary distance PD of the eye of the spectacle wearer based on the lens shape data of the dummy lens of the rimless frame and the lens shape data of the spectacle lens. ing. In addition, the numerical value of the rimless frame warp angle is input, the projection amount of the spectacle lens is obtained from the rimless frame, and the PD is corrected.

  According to this configuration, for example, even in a spectacle lens such as a convex lens or a concave lens having a curvature of 8 curves, or a special lens such as a lenticular, PD correction can be performed in accordance with the prescription (PD value) of the spectacle wearer. It is possible to provide spectacles that match the spectacle wearer.

  The PD correction apparatus according to the embodiment of the present invention corrects the inter-pupil distance PD of the eye of the spectacle wearer based on the lens shape data of the dummy lens of the rimless frame and the lens shape data of the spectacle lens. ing. In addition, the PD correction apparatus has calculation means (calculation control circuit 40) for inputting the numerical value of the warp angle of the rimless frame, obtaining the projection amount of the spectacle lens from the rimless frame, and correcting the PD.

  Further, in the lens grinding method according to the embodiment of the present invention, the spectacle lens is ground based on the lens shape data of the dummy lens of the rimless frame and the lens shape data of the spectacle lens. In addition, by inputting the numerical value of the rimless frame warp angle, the projection amount of the spectacle lens is obtained from the rimless frame, the interpupillary distance PD of the eye of the spectacle wearer is corrected, and the spectacle lens is ground based on the corrected PD value. Processing is to be performed.

  The lens grinding apparatus according to the embodiment of the present invention grinds the spectacle lens based on the lens shape data of the rimless frame and the lens shape data of the spectacle lens. In addition, the lens grinding apparatus obtains the projection amount of the spectacle lens from the input means (“− +” switch 7d) for inputting the numerical value of the warp angle of the rimless frame and the distance between the pupils of the eye of the spectacle wearer. Calculation means (arithmetic control circuit 40) for correcting the PD and grinding means (grinding wheel 11) for grinding the spectacle lens based on the corrected PD value are included. The rimless frame includes nyroll.

Form 2 for carrying out the invention

Next, an embodiment in which a frame shape measuring device (lens shape measuring device) or a lens grinding device and a suction jig mounting device (axial device) are combined will be described with reference to the drawings.

  In order to detachably hold the spectacle lens ML between the lens rotation shafts 9 and 10, as shown in FIG. 2, the lens suction jig G120 is attached to the spectacle lens ML, and the lens suction jig G120 is mounted. A mounting shaft (not shown) is detachably fitted into a mounting hole (not shown) opened on the end surface of the lens rotating shaft 10, and rubber or soft synthetic resin attached to the end of the lens rotating shaft 9 is used. The eyeglass lens ML is pressed by a pressing member 9a made of Since the configuration for this is well known, detailed description thereof is omitted. As the lens suction jig G120, an attachment cup made of rubber, soft synthetic resin or the like is integrally provided at one end of the attachment shaft portion, or an elastic plate is integrally provided at one end of the attachment shaft portion. There are those with double-sided tape attached. Since this configuration is also well known, detailed description thereof is omitted.

  In FIG. A1, G1 is a suction jig mounting device for mounting the lens suction jig G120 to the spectacle lens ML. In this suction jig mounting device G1, eyeglass shape data of the spectacle frame measured by transmission or the like from the frame shape measuring device 1 is input by transmission or the like.

  Furthermore, the suction jig mounting device G1 attaches the lens suction jig G120 to the spectacle lens ML so that the axial center of the lens suction jig G120 is aligned with the geometric center of the target lens shape based on the target lens shape data. Mounting on the basis of the lens shape data of the spectacle frame, the geometric center distance FPD of the left and right spectacle lenses mounted on the spectacle frame F, and the distance PD between the left and right pupils of the spectacle wearer. Control the mechanism (described later). Further, when the lens suction jig 100 is attached to the eyeglass lens ML so that the optical center of the eyeglass lens ML is aligned with the optical center of the eyeglass lens ML, the suction jig mounting device G1 has an internal lens meter (described later). ), The coordinates of the optical center position are measured, and a jig mounting mechanism (described later) is controlled based on the measured coordinates of the optical center position.

In addition, since a well-known thing can be used for the frame shape measuring apparatus 1, description of the detailed structure, a data measurement method, etc. is abbreviate | omitted. The frame shape (lens frame shape) includes movement amount data Zi in the optical axis direction. However, the lens shape information obtained by measuring the template or the dummy lens does not include movement amount data Zi in the optical axis direction. Becomes (θi, ρi). Further, since the lens grinding apparatus 2 in the present embodiment is the same as that described above, the description of the configuration is omitted.
<Suction jig mounting device G1>
Hereinafter, the suction jig mounting device G1 will be described with reference to the drawings.
[Constitution]
FIG. H1 is an enlarged view of the appearance of the lens holding jig mounting device G1 of FIG. A1 for automatically attaching the lens suction jig to the spectacle lens.

  The lens holding jig mounting device G1 in FIG. H1 includes a frame G2 as shown in FIG. H3 and an outer case (device main body) G3 that covers the frame G2.

  The frame G2 includes a bottom plate G4, side plates G5 and G5 that are integrally provided at the center in the front-rear direction of the left and right side edges of the bottom plate G4, and a rear wall G6 that is provided integrally at the rear edge of the bottom plate G4. A base plate G4a fixed as shown in FIGS. H2 (a) and H5 is fixed on the bottom plate G4.

  Further, a bracket G7 projecting forward is disposed above the front side of the bottom plate G4. As shown in FIG. H4, the bracket G7 is connected continuously between the triangular side plate portions G8 and G8 whose rear edge portions are attached to the side plates G5 and G5 and the front edge portions of the side plate portions G8 and G8. It has a plate part G9. This continuous board part G9 is inclined so that it may go back toward the upper end.

An operation panel G10 and a liquid crystal display (display device, display means) G11 are attached to the continuous plate G9.
<Operation panel G10>
As shown in FIG. H1A, the operation panel G10 includes an operation panel unit G10a disposed on the right side of the liquid crystal display G11 and an operation panel unit G10b disposed on the lower side of the liquid crystal display G11.
(Operation panel G10a)
The operation panel G10a includes a “stop” switch G12 for stopping measurement, an “input switching / menu” switch G13 for switching layout data input methods, and a “memory” switch for calling frame data stored in the memory. G14, a “data request” switch G15 for requesting frame data, an “− +” switch G16 for input setting, and a “▽” switch G17 for cursor movement.

  The menu screen can be displayed by holding down the “input switching / menu” switch G13 for a predetermined time (several seconds, for example, 2 seconds) or longer.

  Further, the “input switching / menu” switch G13 is used for instructing confirmation after manual positioning or position setting when pressed in a state of waiting after a block instruction (adsorption instruction) and stopped after measurement. It can be done.

  When the “memory” switch G14 is pressed in the hidden mark observation mode, the screen of the liquid crystal display G11 is switched to the hidden mark storage screen.

  The “data request” switch G15 is used to request transfer of target lens shape data (θi, ρi) from a frame shape measuring device (not shown) connected to the lens holding jig mounting device G1.

  The “− +” switch G16 is used to increase / decrease the numerical data in the portion displayed on the liquid crystal display G11 and whose display color is highlighted by the “▽” switch G17. The “− +” switch G16 is also used to switch the display magnification of the liquid crystal display G11 during manual alignment.

The “▽” switch G17 is used to move the cursor of the data input unit displayed on the liquid crystal display G11. The cursor here refers to a portion of a plurality of data input frames (data input portions) displayed on the liquid crystal display G11, where one of the display colors is inverted or changed to another color, and data input is performed. A state that is possible.
(Operation panel G10b)
The operation panel G10b is provided with function keys F1 to F6 arranged along the lower edge of the liquid crystal display G11. Further, the operation panel G10b is provided with a “left” switch G18L and a “right” switch G18R for specifying the processing for the right eye and the left eye of the spectacle lens and switching the display.
<Function keys F1 to F6>
The function keys F1 to F6 are used at the time of setting related to the processing of the spectacle lens ML, and are used for response / selection to a message displayed on the liquid crystal display G11 in the processing step.

At the time of setting related to processing (layout screen), the function key F1 is used for lens type input (store area) and progressive lens manufacturer specification, the function key F2 is used for lens material input, and the function key F3 is The function key F4 is used for inputting a chamfering type, the function key F5 is used for inputting a mirror finish, and the function key F6 is used for selecting a course (mode).
・ Function key F1
As the lens type input with this function key F1, as shown in FIG. H1B, “single focus”, “marking point”, “progressive”, “bifocal”, “hidden mark”, “automatic discrimination”, etc. is there. In addition, there are manufacturers M1, M2, M3,... As the progressive lens manufacturers input with the function key F1.
・ Function key F2
As the lens material input by the function key F2, as shown in FIG. H1B, there are “plastic”, “high plastic”, “polycarbonate”, “glass”, “acrylic”, “light control glass”, and the like. Here, “Pura” means plastic.
・ Function key F3
As shown in Fig. H1B, the types of spectacle frames (glass frames) F input with the function key F3 are "metal", "cell", "optil", "flat", "groove (thin)" ”,“ Ditching (middle) ”,“ Ditching (thick) ”, etc.

“Point: front bracket”, “point: rear bracket”, “point: composite bracket”, etc. can also be included.
・ Function key F4
As shown in Fig. H1B, the types of chamfering operations that can be input with this function key F4 are "None", "Small (front / rear)", "Medium (front / rear)", "Large (front / rear)", "Special (front / rear) ) ”,“ Small (after) ”,“ middle (after) ”,“ large (after) ”,“ special (after) ”, etc.
・ Function key F5
As the mirror finishing input with the function key F5, as shown in FIG. H1B, there are “none”, “present”, “mirror chamfer”, and the like.
・ Function key F6
The machining course input by the function key F6 includes “auto”, “trial”, “monitor”, “frame change”, “internal trace” and the like as shown in FIG.
<Layout screen>
Further, as the layout screen, for example, a “layout / suction” mode for displaying a layout screen for sucking a lens suction jig on a spectacle lens as shown in FIG. H1C, or a ball as shown in FIG. H1D, for example. There is a “layout” mode indicating a state when the lens suction jig is attracted to the spectacle lens hidden in the target lens shape data (θi, ρi).

  When the “layout” tab TB1 is selected, the message is displayed in a state divided into a message display area E1, a numerical value display area E2, and a state display area E3.

  Further, the outer case G3 has a front wall G19 as shown in FIGS. H1 and H3. In the upper part of the front wall G19, an inclined wall portion G19a inclined backward is formed, and a liquid crystal opening G20 is formed in the inclined wall portion G19a. In the liquid crystal opening G20, as shown in FIG. H1, a liquid crystal display G11 and an operation panel G10 are arranged. Further, a table protrusion / disengagement opening G21 is formed in the lower portion of the front wall G19, and a suction disk mounting opening G22 is formed in a portion of the front wall G19 from the right in the middle in the vertical direction.

Further, as shown in FIG. H2 (a), the entire detection optical system 100, the hidden mark detection optical system 200, and the CL measurement device 300 for measuring refraction characteristics are arranged in the frame G2.
<Whole detection optical system 100>
The entire detection optical system 100 includes an illumination optical system 101 and an entire observation optical system 102.

  The illumination optical system 101 includes optical members such as a light source 103 such as an infrared light emitting LED, a pinhole plate 104, a collimator lens 105, and a rotary reflection plate 106 in this order. The rotary reflector 106 is attached to a rotary shaft 107 a of a drive motor (reflector drive motor) 107 and is driven to rotate by the drive motor 107.

  In the drive motor 107, the axis O1 of the rotation shaft 107a is inclined with respect to the optical axis O2 of the illumination optical system 101. As a result, the rotary reflector 106 is slightly inclined by a predetermined angle α with respect to the axis O1 oriented in the vertical direction. The predetermined angle α is several degrees (for example, 2 ° to 4 °).

  In addition, as shown in FIG. H2 (b), the rotary reflecting plate 106 includes a rotating disc 106a made of a metal plate, a resin plate, or the like, and a reflecting sheet 106b attached to the upper surface of the rotating disc 106a. In this reflection sheet 106b, a large number of very small corner cubes 108 are vertically and horizontally arranged on the entire surface and are integrally formed of resin.

  With such a configuration, the incident light beam 109 incident on the corner cube 108 becomes an output light beam 110 that is reflected from the corner cube 108 and then exits from the corner cube 108 and returns along the incident light beam 109.

  However, since the reflected light beam 111 reflected from the surface of the reflection sheet 106b is reflected at a certain angle with respect to the incident light beam 109, the reflected light beam 111 does not return along the incident light beam 109 like the emitted light beam 110. There is no negative impact on detection.

The overall observation optical system 102 includes optical members such as a collimator lens 105, a half mirror 112, a diaphragm plate 113, an imaging lens 114, and a CCD (two-dimensional light receiving element, area sensor) 115 in this order.
<Hidden mark detection optical system 200>
The hidden mark detection optical system 200 includes the illumination optical system 101 and the hidden mark observation optical system 201 described above.

  The hidden mark observation optical system 201 includes optical members such as a collimator lens 105, a half mirror 202, a diaphragm plate 203, an imaging lens 204, and a CCD (two-dimensional light receiving element, area sensor) 205 in this order.

Of the entire detection optical system 100 and the hidden mark detection optical system 200, the optical members other than the rotating reflector 107 are stored in the optical member storage case G23 shown in FIG. The optical member storage case G23 is fixed to the frame G2 with a bracket (not shown). (Other arrangement examples of the entire observation optical system) The entire observation optical system 102 can also be configured as shown in FIG. H2A. That is, the half mirror 112 of FIG. H2 is disposed between the half mirror 202 and the diaphragm plate 203, the reflected light beam reflected by the half mirror 202 is reflected by the half mirror 112, and the reflected light beam is reflected by the diaphragm plates 113, It may be guided to a CCD (two-dimensional light receiving element, area sensor) 115 via the imaging lens 114.
<CL measuring device 300>
The CL measuring device (lens meter) 300 is positioned on the back side (rear wall 6 side) of the frame G2 and is fixed on the base plate G4a, and has a bracket 301 as shown in FIG. H7. The bracket 301 has an upper housing 302 and a lower housing 303. The upper housing 302 is provided with the measurement light beam projection optical system 304 shown in FIG. H2, and the lower housing 303 is shown in FIG. A light receiving optical system 305 is provided. A conical cylindrical lens receiver 306 is fixed on the lower housing 303.

The measurement light beam projection optical system 304 includes optical members such as a light source 307, a pinhole 308, a reflection mirror 309, and a collimator lens 310 in this order. The light receiving optical system 305 includes optical members such as a pattern plate 311, an imaging lens 312, and a CCD (two-dimensional light receiving element, area sensor) 313 in this order.
<Lid mounting structure>
An L-shaped bracket G24 is fixed on the front end portion (front wall G19 side end portion) of the base plate G4a as shown in FIGS. H10 and H11. An opening G25 is formed in the upright plate portion G24a of the bracket G24, and flanges G24b and G24b are integrally formed on the side portion of the upright plate portion G24a (see FIG. H9).

  The opening G25 is closed by a lid G26. A hinge bracket G27 shown in FIGS. H9 and H10 is fixed to one lower end side of the inner surface of the lid G26. As shown in FIG. H10, the bracket G27 includes a curved portion G27a that is curved in an arc shape downward and downward, a linear plate portion G27b that linearly extends from the rear or end of the curved portion G27a toward the lid G26, and a linear plate. It has a stopper plate part G27c which is provided continuously downward at a right angle (perpendicular) to the part G27b.

  On the other hand, bearing members G28 and G28 positioned below the opening G25 are integrally provided in the vicinity of both side portions of the inner surface of the upright plate portion G24a as shown in FIG. H9.

  The corner portion G27d of the straight plate portion G27b and the stopper plate portion G27c is rotatably held by the bearing members G28 and G28 via the support shaft G29. Further, the bracket G27 is urged to rotate counterclockwise in FIG. H10 by a twisted coil spring G30 wound around the support shaft G29 and interposed between the bracket G27 and the upright plate portion G24a.

Thereby, the lid G26 contacts the front surface of the upright plate portion G24a and closes the opening G25. In this state, the lid G26 closes the table retracting opening G21 of the outer case G3.
<Lens clamp release arm>
Further, on one side of the base plate G4a, as shown in FIG. H8, a G arm 31 used for releasing the lens clamping is fixed in the vicinity of the lid G26. As shown in FIGS. H6 and H9, the arm G31 includes an upright portion G31a, a horizontal portion G31b extending from the upper end of the upright portion G31a along the lid G26, and a plate portion extending from the tip of the horizontal portion G31b toward the lid G26. G31c and a locking claw portion G31d extending downward from the tip of the plate portion G31c.
<Lens holding means moving mechanism>
A lens holding means moving mechanism (first holder moving means) G32 is disposed on the base plate G4a. As shown in FIGS. H8, H10, and H11, the lens holding means moving mechanism G32 is a lateral guide rail (X-direction guide) positioned near the rear end portion on the base plate G4a and the arm G31 (near the front end portion). Rail) G33, a lateral movement member (X direction movement member) G34 disposed on the lateral guide rail G33, and the lateral movement member G34 are supported on the lateral guide rail G33 so as to be movable in the lateral direction (X direction). Bearing G35.

  Further, as shown in FIG. H12, the lens holding means moving mechanism G32 has front and rear guide rails G36 fixed on both sides of the laterally moving member G34 in the front-rear direction (direction perpendicular to the paper surface of FIG. H12, Y direction). And a plate-like front / rear moving member (front / rear moving stage, Y direction moving member) G37 disposed on the front / rear guide rail G36 and the front / rear moving member G37 are instructed to be movable back and forth. It has a bearing G38.

  Further, as shown in FIG. H8, a nut member G39 is fixed to the lateral movement member G34, and a lateral feed screw (first X feed screw) G40 having an axis line in the lateral direction (X direction) is attached to the nut member G39. Is screwed. The lateral feed screw G40 is rotationally driven by a pulse motor (X drive motor) G41 fixed on the base plate G4a.

  A circular light transmission hole G42 is formed in the front / rear moving member G37 so as to face the rotary reflecting plate 106 attached to the drive motor 107 as shown in FIG.

  The pulse motor G41 and the lateral feed screw G40 constitute first lateral movement means (first X direction movement means). Moreover, the movement position of the lateral movement member G34 in the left-right direction (X direction) can be obtained by counting the number of drive pulses of the pulse motor G41.

  Further, as shown in FIG. H10, a nut member G43 is fixed to the front / rear moving member G37 via a bracket G37a and a fixing screw G37b. The nut member G43 has a front / rear feed screw (Y feed screw) whose axis is directed in the front / rear direction. ) G44 is screwed. The front / rear feed screw G44 is rotationally driven by a pulse motor (Y drive motor) G45 fixed on the lateral movement member G34.

The front / rear feed screw (Y feed screw) G44 and the pulse motor (Y drive motor) G45 constitute first front / rear direction moving means (first Y direction moving means). Moreover, the movement position of the front / rear moving member G37 in the front / rear direction (Y direction) can be obtained by counting the number of drive pulses of the pulse motor G45.
<Lens holding means>
As shown in FIGS. H8 to H12, a lens holder G46 is disposed on the front and rear moving member G37, and this lens holder G46 is made to correspond to the light transmission hole G42 of the front and rear moving member G37 as shown in FIG. H11. ing.

  This lens holder G46 has a ring-shaped gear G47 provided with a support flange G47a at the lower part of the inner peripheral surface as shown in FIG. H11. The ring gear G47 has a gear portion G47b and an annular groove G47c extending in the circumferential direction on the circumferential surface. The annular groove G47c is engaged with a plurality of rollers G37R that are rotatably mounted on the longitudinally moving member G37 as shown in FIG. H13 (b). The plurality of rollers G37R are disposed along the light transmission hole G42, and hold the ring-shaped gear G47 rotatably on the front and rear moving member G37.

  Further, as shown in FIG. H11, the lens holder G46 is fitted into the ring gear G47 and is detachably supported on the support flange G47a. The lens holder G46 is mounted on the transparent disk G48. A shaft-shaped lens receiver G49 projecting at an interval of 120 °. The transparent disk G48 may be glass or plastic.

  On the ring gear G47, as shown in FIG. H13 (a), six small gears G50 disposed at equal pitches (60 ° intervals) in the circumferential direction are rotatably mounted. A timing belt G51 is wound around the gear G50. In addition, a tension roller G52 that is rotatably attached to the ring-shaped gear G47 is brought into contact with the outer peripheral surface of the timing belt G51.

  Furthermore, one end portion (base end portion) of each arm G53 is fixed to every other small gear G50, and a lens holding shaft (lens holding member) extending vertically on the other end portion (tip end portion) of each arm G53. ) G54 is attached.

  In addition, a spring receiving pin G55 is attached on the ring-shaped gear G47 in the vicinity of one end of the arm G53, and a coil spring G56 is interposed between the spring receiving pin G55 and one end of the arm G53. Yes. The coil spring G56 urges the arm G53 to rotate so that the tip of the arm G53 rotates toward the center of the ring gear G47.

  One end portions of the small gear G50 and the arm G53 having such a configuration are covered with a cover ring G57 as shown in FIGS. H8 and H9. The cover ring G57 is fixed to the ring-shaped gear G47 with a screw G58. Further, engagement notches G59 for engaging the lens holding shaft G54 are formed on the inner peripheral surface of the cover ring G57 at intervals of 120 ° in the circumferential direction. Further, a notch G60 is formed on the outer peripheral surface of the cover ring G57.

  Further, an engagement protrusion G53a that protrudes upward from the notch G60 is formed at one end of each of the three arms G53.

  Further, a mounting angle setting motor G61 composed of a pulse motor or the like is fixed to the longitudinal movement member G37, and a gear G62 is mounted on the output shaft G61a of the mounting angle setting motor G61. This gear G62 is meshed with the gear part G47b of the ring gear G47. Therefore, when the gear G62 is rotationally driven by the mounting angle setting motor G61, the ring gear G47 is rotated (see FIG. H13).

Moreover, the front / rear moving member G37 is covered with the stage cover SC except for the lens holder G46 (see FIGS. H10 and H11).
<Frame changing lens holder>
Further, instead of the lens supporting transparent disc G48 having the above-described axial lens receiver G49, the frame changing lens holder G63 shown in FIG. H14 may be detachably attached in the ring gear G47 as shown in FIG. it can.

  This frame replacement lens holder G63 has a ring-shaped frame G64 having the same outer diameter as that of the transparent disk G48, a transparent disk G64a fixed in the ring-shaped frame G64, and an equal pitch on the ring-shaped frame G64 ( Three (a plurality of) support shafts G65 projecting at intervals of 120 °, and a lens holding arm (lens holding member) G66 having one end portion (base end portion) rotatably attached to the support shaft G65; The lens holding arm G66 has a coil spring G67 that urges the other end (tip) of the lens holding arm G66 to rotate toward the center of the ring-shaped frame G64. The lens holding arm G66 is formed in a tapered shape toward the tip.

  Such a ring-shaped frame G64 is formed thicker than the above-described transparent disk G64a, and the lens holding shaft G54 of the above-mentioned arm G53 is compared with the ring-shaped gear G47 as shown in FIG. The ring-shaped gear G47 is detachably fitted. Thereby, the lens holding shaft G54 hits the outer peripheral surface of the ring-shaped frame G64 and does not move into the ring-shaped frame G64. Also at this time, the ring-shaped frame G64 is supported on the flange G47a of the ring-shaped gear G47 of FIG.

G64b is a through hole (small hole) provided in the ring-shaped frame G64 for frame replacement, and is used for detection of the frame replacement lens holder G63.
<Lens adsorption mechanism>
As shown in FIGS. H5 and H6, a lens suction mechanism G68 is mounted on the side plate G5 of the frame G2.

  This lens suction mechanism (jig mounting means) G68 has a bracket G69 as shown in FIGS. H5, H16, H18, and H19. As shown in FIGS. H16, H18, and H19, the bracket G69 is connected to an upper support plate portion G69a, a lower support plate portion G69b, and a vertical plate portion G69c connecting the support plate portions G69a and G69b. It is formed in a letter shape. Further, mounting pieces G69d and G69d are provided integrally and at right angles on the upper and lower portions of one side of the vertical plate portion G69c. By attaching the attachment pieces G69d, G69d to the side plate G5 provided on the frame G2 in FIGS. H5 and H6 with screws (not shown), the bracket G69 is attached with the vertical plate portion G69c being perpendicular to the side plate G5.

  The lens suction mechanism G68 has a fixing arm G70 attached to the front lower portion of the vertical plate portion G69c toward the front side, and upper and lower ends fixed to the support plate portions G69a and G69b by fixing means such as screws (not shown). As shown in FIG. H17, the cam cylinder G71 has an internal thread cylinder G72 fitted in the cam cylinder G71 so as to be rotatable and movable up and down (movable up and down). In addition, the lower end part of the internal thread cylinder G72 penetrates the lower support plate part G69b and protrudes downward.

  The cam cylinder G71 is formed with a cam slit (guide slit) G73 extending vertically as shown in FIGS. H5, H16, and H17. The cam slit G73 includes an upper vertical slit portion G73a shown in FIG. H17, a spiral slit portion G73b formed spirally downward from the lower end of the upper vertical slit portion G73a by 90 °, and the spiral slit. It has a lower vertical slit part G73c formed linearly long from the lower end of the part G73b to the lower part of the cam cylinder G71.

  As shown in FIG. H17, a guide roller G74 is rotatably held near the upper end of the outer peripheral surface of the female screw cylinder, and this guide roller G74 is disposed in the cam slit G73.

  A male screw shaft (screw shaft) G75 extending through the upper support plate portion G69a to the lower support plate portion G69b side is rotatably screwed to the female screw cylinder G72. The male screw shaft G75 is held by the upper support plate G69a so as to be rotatable and immovable in the axial direction (vertical direction).

  A pulley G76 is fixed to the upper end portion of the male screw shaft G75. A drive motor G77 is attached to the lower surface of the upper support plate G69a. An output shaft G77a of the drive motor G77 passes through the upper support plate G69a and protrudes upward, and a pulley G78 is fixed to the output shaft G77a. In addition, a timing belt G79 is wound around the pulleys G76 and G78.

  Further, a horizontally extending movable arm G80 is fixed to the lower end portion of the male screw shaft G75. The movable arm G80 faces the front when the guide roller G74 is in the upper vertical slit portion G74a of the cam slit G73, and when the guide roller G74 is in the lower vertical slit portion G74c of the cam slit G73. It faces in the horizontal direction (X direction) and to the left in FIG.

  As shown in FIGS. H16, H18, and H19, a movable bracket (movable member) G82 is rotated at the distal end of the movable arm G80 via a support shaft G81 that extends vertically and horizontally to the extending direction of the movable arm G80. It is held freely. A torsion coil spring G83 wound around a support shaft G81 is interposed between the movable bracket G82 and the movable arm G80 as shown in FIGS. The torsion coil spring G83 urges the movable bracket G82 to be folded in a direction in which the movable bracket G82 is folded toward the lower surface of the distal end of the movable arm G80 as shown in FIG.

A roller G84 is rotatably held on the side surface of the base end of the movable bracket G82. When the movable arm G80 is raised with the movable arm G80 facing forward, the roller G84 comes into contact with a horizontal plate portion (stopper plate portion) G70a provided at the lower end of the fixed arm G70 to twist the movable bracket G82 and torsion coil spring. It is rotated to a vertical state as shown in FIG. H16 against the spring force of G83.
(Suction jig holding means)
Further, a suction jig holding means G85 is attached to the movable bracket G82.

  As shown in FIGS. H22 (a) and H23, the suction jig holding means G85 includes a holder main body G86 in which the cylindrical portion G86a is inserted into the through hole G82a of the bracket G82, and a flange G86b of the holder main body G86. Screws G87 and G87 fixed to the opposing pieces G82b and G82b. The holder main body G86 is provided with a cylindrical portion G86a protruding from the through hole G82a, and an outer cylinder G88 is fitted to the outer periphery of the cylindrical portion G86a so as to be movable in the longitudinal direction.

  The outer cylinder G88 is formed with slits G88a as shown in FIGS. H22 (b) and H22 (c) at intervals of 180 °, and one end of each slit G88a is held by the holder main body G86. Bending portions G89a and G89a at the other ends of the linear springs G89 and G89 are provided. The bent portion G89a is provided with a linear portion G89b in which a part of the peripheral surface is projected from the slit G88a into the outer cylinder G88 as shown in FIGS. H22 (b) and H22 (c).

In addition, a coil spring G90 is interposed between the holder main body G86 and the outer cylinder G88, and the outer cylinder G88 is spring-biased from the holder main body G86 leftward in FIG. A spring support shaft G91 having one end fixed to the end wall G86c of the cylinder part G86a is disposed concentrically within the cylinder part G86a of the holder body G86.
(Suction jig holding release mechanism)
Also, a bottomed cylindrical slide cylinder G92, which is a part of the suction jig holding and releasing mechanism, is fitted in the cylinder G86a so as to be movable in the axial direction, and a spring support shaft G91 is provided in the slide cylinder G92. It is inserted with play. One end of the coil spring G93 is inserted and frictionally held in the slide cylinder G92. A spring support shaft G91 is inserted into the coil spring G93, and the other end of the coil spring G93 is held by an interference fit with the end of the spring support shaft G91 on the end wall G86c side.

  Further, as shown in FIGS. H22A (a) and (b), the cylindrical portion G86a of the holder main body G86 is formed with slit-like notches G86d and G86d that are open at the lower end and spaced apart by 180 °. Yes. Further, as shown in FIGS. H22 (b) and H22A (c), the outer cylinder G88 is formed with a slit-shaped notch guide G88b that opens to the upper end.

  The notch guides G86d and G88b are made to coincide with each other as shown in FIGS. H22 and H22A (d). A guide shaft G94 attached to the outer peripheral surface of the slide cylinder G92 as shown in FIGS. H21 and H22 (a) is inserted through the notch guides G86d and G88b. Further, as shown in FIG. H24, a positioning pin G95 projects from the end wall G92a of the slide cylinder G92. A tapered recess G88c is formed at the outer end of the outer cylinder G88.

  Further, as shown in FIGS. H24 and H30, a hook support shaft G96 is screwed and fixed to the flange G86b of the holder main body G86, and a spring receiving screw G97 is screwed adjacent to the hook support shaft G96. ing. G96a is a flange of the hook support shaft G96.

  The hook support shaft G96 is inserted into the shaft insertion hole G98a of the plate-like locking hook G98 with play as shown in FIG. H3, and supports the locking hook G98 on the flange G86b. A spring locking projection G98b is formed on one side of the locking hook G98, and a slit G98c is formed in the spring locking projection G98b.

  Then, both end portions of the coil spring G99 fitted to the outer periphery of the hook support shaft G96 are locked in the spring receiving screw G97 and the slit G98c. The coil spring G99 urges the locking hook G98 to rotate counterclockwise in FIG. H24, and is interposed between the flanges G86b and G96a to press the locking hook G98 against the flange G86b with a light force. Yes.

  The locking hook G98 is formed with a locking notch G98d as shown in FIGS. H24 to H26, and is positioned on the edge of the locking notch G98d on the opposite side to the rotational biasing direction. An inclined guide piece G98e is formed. A small-diameter shaft portion G94a at the tip of the guide shaft G94 attached to the outer peripheral surface of the slide cylinder G92 is inserted into the locking notch G98d.

  In FIG. H1, 120 is a lens suction jig (lens holding jig). As shown in FIG. H21, the lens suction jig 120 has a mounting shaft portion 121 and a cup portion 122 made of an elastic member such as rubber or soft synthetic resin provided integrally with the mounting shaft portion 121. A positioning groove 123 is formed in the mounting shaft 121 so as to open to the end surface and the peripheral surface. The mounting shaft 121 is fitted into the outer cylinder G88. The lens suction jig 120 is attached to the spectacle lens by pressing the cup portion (suction cup portion) 122 against the spectacle lens.

The lens holding jig may have a configuration in which a plate-like flange is integrally provided at one end of the mounting shaft 121 in place of the cup 122 and a double-sided tape is attached to the flange. In this case, the lens holding jig can be attached to the spectacle lens by pressing the double-sided tape on the flange against the spectacle lens. That is, the spectacle lens can be held by the lens holding jig.
<Control circuit>
The liquid crystal display 11 described above is controlled by an arithmetic control circuit 130 shown in FIG.

  The arithmetic control circuit 130 includes a pulse motor (lateral movement motor, X drive motor) G41, a pulse motor (front / rear movement motor, Y drive motor) G45, a mounting angle setting motor G61, a light source 103, a drive motor 107, and a light source 307. The operation is controlled.

  The switch operation signal from the operation panel G10 and the image signals (measurement signals) from the CCDs 115, 205, and 313 are input to the arithmetic control circuit 130. The arithmetic control circuit 130 is connected to an image processing circuit Gs. The image processing circuit Gs processes the image signals from the CCDs 115, 205, and 313 together with the calculation control circuit 130. The image processing circuit Gs is used to process an image signal from the CCD 115 together with the arithmetic control circuit 130 to obtain an image display, which will be described later, and one data such as a geometric center and an optical center. The image processing circuit Gs will not be described later in the operation.

  The arithmetic control circuit 130 is connected with a target lens shape measuring device (not shown) and a memory Ma. This target lens shape measuring apparatus measures the shape of a lens frame, the peripheral shape of a target lens shape, a demo lens, or the like as target lens shape data (θi, ρi) in a polar coordinate format, and a known device can be adopted.

When the arithmetic control circuit 130 depresses the “data request” switch 15 on the operation panel G10, the target lens shape data (θi, ρi) is requested and stored in the memory Ma. The arithmetic control circuit 130 calls the frame data stored in the memory Ma when the “memory” switch G14 on the operation panel G10 is pressed.
[Action]
Next, the operation of the lens suction device having such a configuration will be described.
(1) Attaching the Lens Suction Jig 120 to the Lens Suction Mechanism G68 FIG. H1 shows a state before detection of the hidden mark of the spectacle lens and refraction measurement of the spectacle lens. In this state, as shown in FIG. H17, the guide roller G74 of the lens suction mechanism G68 is located in the upper end of the upper vertical slit G73a of the cam slit G73 provided in the cam cylinder G71, and the female screw cylinder G72 is raised most. In the position.

  At this position, the movable arm G80 attached to the lower end of the female screw cylinder G72 is positioned at the highest position as shown in FIGS. H5 and H16, and the roller G84 of the movable bracket G82 is shown in FIG. Thus, the movable bracket G82 is brought into contact with the horizontal plate portion G70a of the fixed arm G70, and is directed downward as shown in FIG. H16 against the spring force of the torsion coil spring G83 shown in FIG. .

  In this state, as shown in FIG. H1, the movable bracket G80 faces the suction disk mounting opening G22. Accordingly, the operator inserts the mounting shaft portion 121 of the lens suction jig 120 into the outer cylinder G88 provided in the movable bracket G82 as shown in FIGS. H21 and H22 from the suction disk mounting opening G22. At this time, the positioning pin G95 is inserted into the positioning groove 123 provided in the mounting shaft 121.

  When the mounting shaft 121 is pushed in, the slide cylinder G92 is moved toward the end wall G86c of the holder main body G86 by the mounting shaft 121 against the spring force of the coil spring G93.

  Thereafter, when the mounting shaft 121 of the lens suction jig 120 is further pushed into the outer cylinder G88 so as to get over the linear portion G89b of the linear spring G89, the mounting shaft 121 connects the linear portion G89b of the linear spring G89. The spring G89 is pushed into the slit G88a of the outer cylinder G88 against the spring force of the bent part G89a. In this state, the linear portion G89b is pressed against the outer peripheral surface of the mounting shaft portion 121 as shown in FIG. H23 by the spring force of the bent portion G89a, and the mounting shaft portion 121 is held in the outer cylinder G88. Therefore, even if the outer cylinder G88 faces downward, the lens suction jig 120 does not fall downward.

In this state, the small-diameter shaft portion G94a of the guide shaft G94 is positioned in the locking notch G98d of the locking hook G98.
(2) Holding the spectacle lens to the lens holder G46 (exposing the lens holder G46 to the outside of the outer case G3 and placing the lens)
On the other hand, when the automatic determination in FIG. H1B is selected by operating the function key F1 on the operation panel G10, and either the “left” switch G18L or the “right” switch G18R in FIG. The operation of the pulse motor G45 is controlled by the arithmetic control circuit 130 of FIG. H2 (a), the forward / backward feed screw G44 of FIG. H8 is rotated forward, and the nut member G43 and the forward / backward movement member G37 are moved to the lid G26 side.

  Along with this movement, the stage cover SC covering the longitudinally moving member G37 contacts the lid G26, and then twists the lid G26 against the spring force of the coil spring G30 around the support shaft G29 in the clockwise direction in FIG. The lens holder G46 attached to the front / rear moving member G37 is exposed through the opening G25 of FIG. H10 and the opening / disengagement opening G21 of FIG.

  At this time, the engaging projection G53a of the lens holder G46 is engaged with the engaging claw G31d of the arm G31, and the arm G53 integrated with the engaging projection G53a in FIG. The lens holding shaft G54 of the arm G53 integrated with the engaging projection G53a moves toward the notch G60 side of the cover ring G57 in FIG. H9.

  Accordingly, the timing belt G51 in FIG. H13 (a) is rotated in the clockwise direction, and the other two small gears G50 are also rotated in the clockwise direction by the timing belt G51. The arm G53 integrated with the two small gears G50 is rotated in the clockwise direction against the spring force of the coil spring G56. The remaining two small gears G50 and the lens holding shaft G54 of the arm G53 are shown in FIG. Move to the notch G60 side of the middle cover ring G57.

With the three lens holding shafts G54 thus moved to the cover ring G57 side and opened, the spectacle lens ML is placed on the shaft-shaped lens receiver G49 of the lens holder G46 as shown in FIG. Place.
(Moving the lens holder G46 into the outer case G3 and holding the lens)
Thereafter, when the arithmetic control circuit 130 selects and presses either the “left” switch G18L or the “right” switch G18R in FIG. H1A, it controls the operation of the pulse motor G45 and reverses the front-rear feed screw G44. The nut member G43 and the forward / backward moving member G37 are moved into the outer case G3.

  Along with this, when the stage cover SC covering the longitudinally moving member G37 is separated from the lid G26, the lid G26 is rotated counterclockwise in FIG. H10 about the support shaft G29 by the spring force of the twist coil spring G30. The openings G25 and G21 are closed by the lid G26.

  At this time, when the engaging projection G53a of the lens holder G46 is separated from the locking claw G31d of the arm G31, the arm G53 integrated with the engaging projection G53a is moved by the spring force of the coil spring G56 in FIG. The lens holding shaft G54 of the arm G53 integrated with the engaging projection G53a moves to the center side of the cover ring G57 in FIG.

  Accordingly, the timing belt G51 in FIG. H13 (a) is rotated in the counterclockwise direction, and the remaining two small gears G50 are rotated in the counterclockwise direction by the timing belt G51. The arm G53 integrated with the two small gears G50 is rotated counterclockwise by the spring force of the coil spring G56, and the lens holding shaft G54 of the arm G53 integrated with the remaining two small gears G50 is shown in FIG. Move to the center side of the cover ring G57.

In this way, the three lens holding shafts G54 are moved to the center side of the cover ring G57 and come into contact with the peripheral surface of the spectacle lens ML placed on the shaft-shaped lens receiver G49 of the lens holder G46. The lens ML is clamped (held) by three lens holding shafts G54 as shown in FIG.
(3) Measurement by CL measuring apparatus 300 In addition, after confirming the presence or absence of the spectacle lens ML, the arithmetic control circuit 130 confirms that the spectacle lens ML has no hidden mark, small ball, or mark mark, etc., then turns on the pulse motor G45. By controlling the operation, the front / rear feed screw G44 is reversed, the nut member G43 and the front / rear moving member G37 are moved to the CL measuring device 300 side, and the spectacle lens ML is measured with the measurement light beam projection optical system 304 and the light receiving optics of the CL measuring device 300. Arranged between the system 305 and the pulse motor G45 is stopped.

  Thereafter, the arithmetic control circuit 130 turns on the light source 307 to emit a measurement light beam. The measurement light beam from the light source 307 is guided to the collimator lens 310 through the pinhole plate 308 and the reflection mirror 309, and is projected as a parallel light beam from the collimator lens 310 onto the spectacle lens ML.

  The measurement light beam transmitted through the spectacle lens ML is transmitted through the pattern plate 311, and the pattern of the pattern plate 311 is imaged on the CCD 313 via the imaging lens 312. A measurement signal (image signal) is input from the CCD 313 to the arithmetic control circuit 130. Then, the arithmetic control circuit 130 measures the spherical power S, the cylindrical power C, the axial angle A of the cylindrical shaft, the optical center OC, and the like, which are the refractive characteristics of the spectacle lens ML, based on the measurement signal from the CCD 313.

  When the measurement of the refractive characteristics of the spectacle lens ML is completed, the arithmetic control circuit 130 controls the operation of the pulse motor G45 to rotate the forward / backward feed screw G44 in the forward direction so that the nut member 43 and the forward / backward movement member 37 are moved to the lid 26 side. And the lens holder 46 and the spectacle lens ML are moved between the rotary reflector 106 and the illumination optical system 101 of the whole detection optical system 100 and the hidden mark detection optical system 200, and the operation of the pulse motor G45 is stopped. .

Regardless of whether or not there is a hidden mark, a mode for measuring the spherical power S, the cylindrical power C, the axial angle A of the cylindrical shaft, the optical center OC, etc., which are the refractive characteristics of the spectacle lens ML, may be provided. good.
(4) Attaching the Lens Adsorption Jig 120 to the Eyeglass Lens ML As described above, the arithmetic control circuit 130 detects the presence / absence of the eyeglass lens ML, the type of the eyeglass lens ML, the hidden mark, etc., and then sets the attachment angle. The lens holder G46 is controlled by operating the motor G61 to rotate the ring gear G47 of the lens holder G46 so that the hidden mark or the like matches the mark (not shown) displayed on the liquid crystal display G11. And the spectacle lens ML held by the lens holder 46 is rotated around the optical axis.

  Alternatively, the arithmetic control circuit 130 measures the refractive characteristics of the spectacle lens ML with the CL measuring device 300, and then turns the spectacle lens ML into the rotating reflector 106, the entire detection optical system 100, and the illumination optical system 101 of the hidden mark detection optical system 200. When there is a cylindrical shaft or the like, the mounting angle setting motor G61 is controlled and the ring gear G47 of the lens holder G46 is rotated to rotate the lens holder G46. Then, the spectacle lens ML held by the lens holder G46 is rotated around the optical axis.

  Thereafter, the arithmetic control circuit 130 controls the operation of the drive motor G77, transmits the rotation of the drive motor G77 to the male screw shaft G75 via the pulley G78, the timing belt G79, and the pulley G76, and rotates the male screw shaft G75. The internal thread cylinder G72 is moved downward.

  Along with this, the movable arm G80 integrated with the female screw cylinder G72 is lowered, the roller G84 at the tip of the movable arm G80 is separated from the horizontal plate part G70a of the fixed arm G70, and the movable bracket G82 is twisted as shown in FIG. The coil spring 83 is rotated to the lower surface side of the movable arm G80 by the spring force of the coil spring 83. Finally, as shown in FIG. H18, the lens suction jig 120 faces downward so that the lens suction jig 120 faces downward.

  On the other hand, in accordance with this operation, the guide roller G74 attached to the female screw cylinder G72 moves from the upper vertical slit part G73a to the lower vertical slit part G73c via the spiral slit part G73b, and the movable arm G80 is integrated with the female screw cylinder G72. Is rotated to the 90 ° lens holder G46 side, and the lens suction jig 120 is moved above the spectacle lens ML.

  Thereafter, the female screw cylinder G72 and the movable arm G80 are further lowered, and the cup portion (suction cup) 122 of the lens suction jig 120 at the tip of the movable arm G80 is placed on the axial lens receiver G49 as shown in FIGS. The eyeglass lens ML is contacted.

  Then, the arithmetic control circuit 130 controls the operation of the drive motor G77, slightly lowers the female screw cylinder G72 and the movable arm G80, and further pushes the mounting shaft 121 of the lens suction jig 120 into the outer cylinder G88. Thus, the slide cylinder G92 is slightly moved toward the end wall G86c of the holder main body G86 against the spring force of the coil spring G93, and the cup 122 is attracted to the spectacle lens ML.

  Accordingly, the locking hook G98 is rotated counterclockwise in FIG. H24 by the spring force of the coil spring G99, so that the inclined guide piece G98e is a small diameter shaft portion G94a of the guide shaft G94 as shown in FIG. Move up. Accordingly, the locking hook G98 is inclined as shown in FIG. H31 (b), and the inclined guide piece G98e is also inclined in the width direction.

  Thereafter, the arithmetic control circuit 130 reverses the drive motor G77 to raise the movable arm G80 integrated with the female screw cylinder G72.

  Along with this, the slide cylinder G92 moves to the lens mounting shaft 121 side by the spring force of the coil spring G93, and the small-diameter shaft portion G94a of the guide shaft G94 attached to the slide cylinder G92 tilts integrally with the slide cylinder G92. It is moved along the guide piece G98e to the front end side of the locking hook G98.

  At this time, the small-diameter shaft portion G94a causes the rotating guide Fa to act on the inclined guide piece G98e in the direction opposite to the direction in which the locking hook G98 is urged by the coil spring G99 as shown in FIG. Accordingly, the locking hook G98 is slightly rotated in the clockwise direction against the spring force of the coil spring G99 in FIG. 24, and the small-diameter shaft portion G94a of the guide shaft G94 is within the locking notch G98d of the locking hook G98. Moved to.

  On the other hand, when the slide cylinder G92 moves to the mounting shaft 121 side by the spring force of the coil spring G93, the attachment shaft portion 121 is pressed through the slide cylinder G92 by the spring force of the coil spring G93, and the tapered recess of the outer cylinder G88. The mounting shaft 121 is moved away from the linear portion G89b of the linear spring G89. In this state, the mounting shaft 121 is easily detached from the outer cylinder G88.

  When the arithmetic control circuit 130 further raises the female screw cylinder G72 and the movable arm G80, the roller G74 attached to the female screw cylinder G72 is raised in the lower vertical slit portion G73c, and the lens suction jig 120 is moved to the movable arm G80. Is removed from the outer tube G88 at the tip of the lens and is left in a state of resting on the spectacle lens ML.

  Thereafter, the roller G74 attached to the female screw cylinder G72 is moved from the lower vertical slit portion G73c to the upper vertical slit portion G73a via the spiral slit portion G73b, and the movable arm G80 rotates to the 90 ° side plate G5 side. Thus, the movable arm G80 is retracted from above the spectacle lens ML.

When the movable arm G80 is raised and the roller G74 is raised in the upper vertical slit portion G73a, the roller G84 of the movable bracket G82 contacts the horizontal plate portion G70a of the fixed arm G70 as shown in FIG. As a result, the movable bracket G82 is directed downward as shown in FIG. H16 against the spring force of the torsion coil spring G83 shown in FIG. H20. As a result, the movable bracket G82 faces the suction disk mounting opening G22 as shown in FIG. H1, and a new lens suction jig can be mounted.
(5) Attachment Position of Lens Adsorption Jig 120 to Eyeglass Lens ML The attachment position of this lens adsorption jig 120 to the eyeglass lens ML is based on the optical center of the eyeglass lens ML and the ball based on the lens shape data. It may be the geometric center of the mold shape. The attachment position of the lens adsorption jig 120 to the spectacle lens ML is the coordinates of the optical center position of the spectacle lens measured by the lens meter (CL measurement apparatus 300) inside the adsorption jig mounting apparatus G1 as shown in (3). Is used. Further, the approach amount (corrected approach amount) and processing data obtained by the arithmetic control circuit 40 of the lens grinding apparatus 1 in Embodiment 1 of the invention are obtained by the arithmetic control circuit 130 of the suction jig mounting apparatus G1. In addition, the processing control circuit 40 of the suction jig mounting device G1 also determines whether or not processing is possible by the arithmetic control circuit 40 of the lens grinding apparatus 1 according to Embodiment 1 of the invention. At this time, the display content of the process availability determination displayed on the liquid crystal display 8 of the lens grinding apparatus 1 is displayed on the liquid crystal display G11 of the suction jig mounting apparatus G1.

When the attachment position of the lens suction jig 120 to the spectacle lens ML is the optical center of the spectacle lens ML, that is, the suction jig mounting device G1 has a geometric center of the target lens shape based on the target lens shape data. The lens suction jig G120 is attached to the spectacle lens ML so that the axial center of the lens suction jig G120 coincides with the position. In this case, the arithmetic control circuit 130 determines the lens shape data of the spectacle frame, the geometric center distance FPD of the left and right spectacle lenses attached to the spectacle frame F, the distance PD between the left and right pupils of the spectacle wearer, and the spectacle lens. Based on the coordinates of the optical center position and the like, the X drive motor G41, the Y drive motor G45, the mounting angle setting motor G61, and the like, which are internal jig mounting mechanisms, are controlled to operate the lens suction jig G120 of (4). Control is performed so that the axial center of the lens suction jig G120 coincides with the position that is the geometric center of the target lens shape based on the target lens shape data at the attachment position to the spectacle lens ML. Also in this case, machining data based on the amount of correction (corrected amount of correction) obtained in the first embodiment of the invention is used,
Further, when the lens suction jig 100 is attached to the eyeglass lens ML so that the optical center of the eyeglass lens ML is aligned with the optical center of the eyeglass lens ML, the suction jig mounting device G1 has an internal lens meter (described later). ), The coordinates of the optical center position of the spectacle lens are measured, and the lens suction jig G120 is attached to the spectacle lens ML so that the axial center (center) of the lens suction jig G120 coincides with the measured optical center position. . In this case, the arithmetic control circuit 130 determines the lens shape data of the spectacle frame, the geometric center distance FPD of the left and right spectacle lenses attached to the spectacle frame F, the distance PD between the left and right pupils of the spectacle wearer, and the spectacle lens. Based on the coordinates of the optical center position, the target lens shape data, etc., the X drive motor G41, the Y drive motor G45, the mounting angle setting motor G61, etc., which are internal jig mounting mechanisms, are operated and controlled, and the lens of (4) At the position where the suction jig G120 is attached to the eyeglass lens ML, control is performed so that the axis of the lens suction jig G120 coincides with the position that is the optical center of the target lens shape based on the target lens shape data.
(6) Example of processing availability determination By the way, the lens grinding apparatus 2 mentioned above has the operation panels 6 and 7, and the suction jig mounting apparatus G1 has the operation panel G10. Further, as described above, the operation panel 6 includes a “clamp” switch 6a for clamping the spectacle lens by the lens rotation shafts 9, 10 and designation and display of processing for the right and left eyes of the spectacle lens. A “left” switch 6b and a “right” switch 6c are provided. The operation panel 7 is provided with a data request switch 7c, function keys, “+” and “−” switches, and the operation panel G10 of the suction jig mounting device G1 has a data request switch G15, function keys, and “+”. "-" Switches and the like are provided. The lens grinding apparatus 2 has an arithmetic control circuit 40, and the suction jig mounting apparatus G 1 has an arithmetic control circuit 130.

Then, by turning on the power of the lens grinding device 2, the suction jig mounting device G1, etc., the arithmetic control circuit 40 of the lens grinding device 2 and the arithmetic control circuit 130 of the suction jig mounting device G1 start control operations. . The arithmetic control circuit 40 and the arithmetic control circuit 130 determine whether or not machining is possible based on the flowchart shown in FIG.
Step S20
When the data control switch 40 of the operation panel 7 is pressed, the arithmetic control circuit 40 of the lens grinding apparatus 2 starts a control operation based on the flowchart of step S20 in FIG. H32 and is measured by the frame shape measuring apparatus 1. The lens shape measuring device 1 is requested for the lens shape data (frame measurement data) of the spectacle frame F.

  In addition, when the operation control circuit 130 of the suction jig mounting device G1 presses the data request switch G15 of the operation panel G10, the control operation based on the flowchart of step S20 in FIG. The frame shape measuring apparatus 1 is requested for the target lens shape data (frame measurement data) of the spectacle frame F.

Then, when the target lens shape data requested from the frame shape measuring apparatus 1 is input to the arithmetic control circuit 40 or 130,
Step S21
In this step S21, the arithmetic control circuit 40 or 130 uses the function keys of the operation panel 7 or G10, the switches of “+” and “−”, etc., the interpupillary distance PD for obtaining the eye point of the spectacle wearer as layout data, When the shift amount UP, the average value of the warp angle of the spectacle frame F, etc. are input, the liquid crystal display 8 or G11 displays the target lens shape layout display as shown in FIGS. H1C and H1D, and the process proceeds to step S22. To do.
Step S22
In step S22, the arithmetic control circuit 40 or 130 calculates a “3D (three-dimensional) correction” value from the target lens shape data (frame measurement data) and the layout data, and proceeds to step S23.
Step S23
In step S23, the arithmetic control circuit 40 or 130 displays a “3D (three-dimensional) correction” value, and proceeds to step S24.
Step S24
In step S24, the arithmetic and control circuit 130 performs an axis alignment operation in consideration of the “3D (three-dimensional) correction” value, and proceeds to step S25. In the axis alignment operation in step S24, the lens suction jig 130 is attached to the spectacle lens ML as described above.
Step S25
In step S <b> 25, the arithmetic control circuit 40 causes the lens rotation shaft 9 to be affected from the lens rotation shaft 10 by turning on the switch 6 a of the operation panel 6 and keeps the distance between the lens rotation shafts 9 and 10. In this state, the spectacle lens ML on which the lens suction jig 120 is mounted by the suction jig mounting device G1 is disposed between the lens rotation shafts 9 and 10, and the lens suction jig 120 of the spectacle lens ML is rotated. It fits in a fitting hole (not shown) at the end of the shaft 10.

In step S25, when the calculation control circuit 40 turns on the switch 6a of the operation panel 6 again, the calculation control circuit 40 moves the lens rotation shaft 9 to the lens rotation shaft 10 side, and the lens of the lens rotation shaft 9 is moved. The presser 9a is pressed against the spectacle lens ML as shown in FIG. 2 so that the spectacle lens ML is held between the lens rotation shafts 9 and 10, and the process proceeds to step S26.
Step S26
In step S26, when the “left” switch 6b or “right” switch 6c provided on the operation panel 6 of the lens grinding apparatus 2 is operated to start machining, the arithmetic control circuit 40 proceeds to step S27.
Step S27
In step S27, the arithmetic and control circuit 40 starts measurement control for obtaining processing data necessary for the grinding processing of the spectacle lens. In this step S27, the edge thickness Wi in the target lens shape data of the unprocessed circular spectacle lens ML is obtained by the feelers 19a and 19b (measuring elements) of the bar thickness measuring device as described above, and the process proceeds to step S27.

  At this time, in the lens grinding apparatus 2, by moving the feelers 19a and 19b (measurement elements) in the radial direction of the spectacle lens ML, the front refractive surface of the spectacle lens ML in the axial direction of the lens rotation axes 9 and 10 ( The positions of the lens front) and the rear refractive surface in the radial direction are measured by the feelers 19a and 19b (measuring elements) of the edge thickness measuring device. Therefore, in this measurement, the curvature (that is, the radius of curvature) of the front refractive surface (lens front) and the rear refractive surface of the spectacle lens ML is obtained.

In step S27, the arithmetic and control circuit 40 determines the bevel apex position of the bevel formed at the edge of the edge based on the measurement data such as the edge thickness Wi and the curvature radius (curvature) (position from the front refracting surface which is the lens front). Is obtained, the obtained measurement data and the bevel apex data are obtained, and the process proceeds to step S28.
Step S28
In this step S28, the arithmetic control circuit 40 calculates the “3D (three-dimensional) correction” value based on the actual lens curve value based on the data obtained in step S27, and proceeds to step S29.
Step S29
In step S29, the arithmetic control circuit 40 determines whether the position where the lens suction jig is mounted on the spectacle lens is the optical center or the boxing center (geometric center). The arithmetic control circuit 40 proceeds to step S30 when it is determined that the lens suction jig is the optical center, and to step S32 when it is determined that the lens suction jig is the boxing center (geometric center). Transition.

  This determination is made by setting “optical center” and “geometric center” as items of the suction position on the liquid crystal display 8 by operating the function keys on the operation panel 7, and “optical center” and “geometric center”. Depending on which one is selected. In addition, a switch for selecting the suction position or a mode selection switch for selecting the suction position is provided, so that it is possible to select whether the lens suction jig is to be sucked to the “optical center” or “geometric center”. Thus, it may be determined whether the position where the lens suction jig is mounted on the spectacle lens is the optical center or the boxing center (geometric center).

  Further, if there are measurement data of step S25 to S27 and data of the bevel apex position, the “3D (three-dimensional) correction” value of step S28 and the determination of step S29 are performed by the arithmetic control circuit 130 of the suction jig mounting device G1. It can also be done. The determination as to whether machining is possible after step S29 may be performed by either the arithmetic control circuit 40 or 130.

  Here, the corrected eccentricity when the processing axis (lens rotation axes 9, 10 and the axis of the lens suction jig) is aligned with the center (geometric center) of the lens shape of the spectacle lens is (A ) Value = Eccentricity DCN [box], and the corrected eccentricity when the processing axis (lens rotation axes 9 and 10 and the axis of the lens suction jig) is aligned with the geometric center. The core amount is DCN [opt].

In addition, as in [I] described above, the eccentricity DCN [box] of [I] when the machining axis is aligned with the center of the BOX is
DCN [box] = DCT [box] + DCH [box]
It is.

Further, as in [II] described above, the eccentric amount DCN [opt] when the processing axis (the lens rotation shafts 9 and 10 and the axis of the lens suction jig) is aligned with the optical center of the spectacle lens,
DCN [opt] = DCT [opt] + DCH [opt]
It is.
Step S30
In this step S30, the arithmetic control circuit 40 or 130 obtains “machining eccentric amount = shift amount + (B) value”, that is, “machining eccentric amount = shift amount + [II] eccentric amount DCN [box]”. Then, the process proceeds to step S31.
Step S31
In step S31, the arithmetic control circuit 40 or 130 calculates “difference (C) between (A) value and (B) value”, that is, “difference between DCN [box] and DCN [opt]” as difference (C). Then, the process proceeds to step S32.
Step S32
In this step S31, the arithmetic control circuit 40 or 130 obtains “processing eccentricity amount = shift amount + (A) + (C) value” and proceeds to step S31.
Step S33
In this step S33, the arithmetic control circuit 40 performs the second measurement of the lens front (front refracting surface) of the spectacle lens ML with the feelers 19a and 19b (measuring element) based on the target lens shape data, and the bevel shoulder position. The position (edge surface position) of the edge shape of the target lens shape is obtained as correction processing data in the same polar coordinate format as the target lens shape data.

  The position of the lens rotation axes 9 and 10 in the lens shape data of the front and rear refractive surfaces of the spectacle lens ML (the optical axis direction of the spectacle lens), and the front refractive surface and the rear of the spectacle lens ML. Since the curvature and radius of curvature of the side refracting surface are obtained by the measurement in step S27, the position of the edge shape (edge surface position) of the edge shape that is the bevel shoulder position is calculated in the measurement of step S27. The calculation control circuit 40 or the calculation control circuit 130 can use the data obtained by the above.

  The target lens shape based on the corrected processing data thus obtained and the suction jig shape of the lens suction jig are superimposed and displayed on the liquid crystal display 8 or G11 in step S31. Thereby, it can be easily determined whether or not the lens suction jig 120 protrudes from the target lens shape. Note that this determination can be made by the arithmetic control circuit 40 or the arithmetic control circuit 130, and display of whether processing is possible can also be made on the liquid crystal display 8 or G11.

  This determination is made by inputting the target lens shape based on the corrected processing data, the shape and dimensions of the lens suction jig in advance to the arithmetic control circuit 40 or 130, and the target shape of the suction jig based on the corrected processing data. It can be determined whether or not it protrudes from the shape, that is, whether or not processing interference occurs due to the grinding wheel of the spectacle lens.

  Note that the spectacle lenses ML (R) and ML (L) of the spectacle frame F are used, the unprocessed spectacle lens is ML (t) that is a processed spectacle lens, and the spectacle lens that is ground into a target lens shape is ML (d ), The processing availability determination device (lens grinding processing device 2 or suction jig mounting device G1) of the embodiment of the present invention has the following configuration. Here, the spectacle lens ML (t) includes an unprocessed circular spectacle lens and a spectacle lens for frame replacement.

  The processing possibility determination device (lens grinding processing device 2 or suction jig mounting device G1) according to the embodiment of the present invention described above has the shape of the eyeglass lenses ML (R) and ML (L) of the spectacle frame F. Display device (liquid crystal display 8, G11) to be displayed, and data input means (operation panels 7, G15) for inputting the geometric center distance FPD of the left and right spectacle lenses ML and the left and right pupil distance PD of the spectacle wearer. ) And the distance between the geometric center distance FPD and the inter-pupil distance PD as a shift amount that is an eccentric amount with respect to the geometric center of the left and right target lens shapes, and the peripheral edge of the spectacle lens ML (t) When the spectacle lens ML (d) processed into the target lens shape is mounted on the spectacle frame F, the optical center of the spectacle lens ML (d) is the geometric center of the spectacle lens by the shift amount. And a calculation control circuit (40,130) for obtaining the processed data of the spectacle lenses modified to eccentrically against. In addition, the arithmetic control circuit (40, 130) superimposes the optical center on the target lens shape based on the processing data and displays the layout on the display device (liquid crystal display 8, G11), and the spectacle lens. The suction jig shape of the lens suction jig 120 used for mounting on the lens rotation shaft (9, 10) of the lens grinding apparatus 2 when processing the periphery of ML (t) into the target lens shape is the optical center. In addition, when the eyeglass lens ML is ground by the grinding wheel 11, it can be determined whether or not the lens suction jig interferes with the grinding wheel. It is said. Further, the processing availability determination device (the lens grinding processing device 2 or the suction jig mounting device G1) includes spectacle lens data input means for inputting a warp angle of the spectacle lens frame and a curve value of the refractive surface of the spectacle lens. Yes. Moreover, when the optical center of the spectacle lens ML (t) processed into the target lens shape based on the processing data is attached to the spectacle frame F, the arithmetic control circuit (40, 130) Alignment amount correction data capable of processing the lens to be processed so that the position of the optical center does not shift depending on the warp angle of the lens (glass lens frame or spectacle lens) and the curve value of the refractive surface of the spectacle lens, the optical center The correction optical center and the target lens shape based on the correction processing data are obtained by obtaining a correction amount obtained by correcting the amount of correction based on the correction amount correction data, obtaining correction processing data based on the correction amount The shape is displayed, and the center of the suction jig shape is made coincident with the geometric center or the corrected optical center, and the suction jig shape is displayed by overlapping the target lens shape. It allows the lens suction jig the spectacle lens when grinding the grinding wheel is possible determine whether to interfere with the grinding wheel.

  According to this configuration, the amount of shift based on the optical center (eyeglass wearer's eye, optical axis) is obtained, and a high-curve fabric lens is also attached with an adsorption jig based on the optical center position. Unprocessed determination can be performed, and accurate grinding can be realized.

  In the processing availability determination device according to the embodiment of the present invention, the arithmetic control circuit (40, 130) is configured to calculate the correction optical center and the target lens shape based on the correction processing data and the dimension data of the suction jig shape. When the eyeglass lens is ground by the grinding wheel 11, it is determined whether or not the lens suction jig 120 interferes with the grinding wheel 11. .

  According to this configuration, the amount of shift based on the optical center (eyeglass wearer's eye, optical axis) is obtained, and even for high-curve fabric lenses, a suction jig is attached based on the optical center position, and is not processed Judgment can be made automatically.

DESCRIPTION OF SYMBOLS 1 ... Frame shape measuring apparatus 2 ... Lens grinding processing apparatus (processing availability determination apparatus)
G1 ... Suction jig mounting device (processing availability determination device)
F ... Eyeglass frame ML ... Eyeglass lens FPD ... Geometric center distance PD ... Interpupillary distance 7 ... Operation panel (data input means)
8, G10 ... Operation panel (data input means)
9, 10 ... Lens rotation axis 40, 130 ... Calculation control circuit

Claims (2)

A lens shape measuring device for measuring the shape of the lens frame of the spectacle frame as a target lens shape, or measuring the shape of the spectacle lens as a target lens shape from a template or a demo lens;
A display device for displaying the target lens shape measured by the target lens shape measuring device ;
Data input means for inputting the distance between the geometric centers FPD of the right and left spectacle lenses and the distance PD between the left and right pupils of the spectacle wearer;
The difference between the geometric center distance FPD and the inter-pupil distance PD is obtained as a shift amount that is an eccentric amount with respect to the geometric center of the left and right target lens shapes, and the peripheral edge of the spectacle lens is processed into the target lens shape. When the processed spectacle lens is attached to the spectacle frame, the processing data of the spectacle lens corrected so that the optical center of the spectacle lens is decentered from the geometric center of the spectacle lens by the shift amount A calculation control circuit to be obtained,
The arithmetic control circuit superimposes the optical center on the target lens shape based on the processing data, displays the layout on the display device, and performs lens grinding when processing the periphery of the spectacle lens into the target lens shape. The suction jig shape of the lens suction jig used for mounting on the lens rotation shaft of the apparatus is displayed on the display device in a layout together with the optical center and the target lens shape, and the spectacle lens is ground by a grinding wheel. A workability determination device capable of determining whether or not the lens suction jig interferes with the grinding wheel when
A switch for inputting a numerical value of the curvature angle of the lens frame of the spectacle frame ;
An edge thickness measuring means for measuring the edge thickness of the spectacle lens held on the lens rotation shaft of the lens grinding apparatus;
The arithmetic control circuit measures the positions in the optical axis direction at several positions in the lens shape portion of the front refractive surface of the spectacle lens held on the lens rotation axis by the edge thickness measuring means, While calculating the front curve of the front refractive surface of the spectacle lens based on the measured positions of the front refractive surface in several optical axis directions, the target lens shape is measured from the template or the demo lens. And if the target lens shape is measured from the template or the demo lens, the display device displays an input frame for inputting the value of the warp angle by the switch, and
The arithmetic control circuit obtains the correction amount correction data for the optical center based on the calculated front curve and the warp angle input to the input frame by the switch, and the optical center matches the pupil center. determined based on a shift amount in the shift amount correction data, seeking correction processing data based on the corrected shift amount, along with displaying the corrected optical center and lens shape based on the correction processing data, the suction jig shape By aligning the center with the geometric center or the corrected optical center and displaying the suction jig shape on the target lens shape, the lens suction treatment is performed when the spectacle lens is ground with a grinding wheel. It is possible to determine whether or not a tool interferes with the grinding wheel. The processing control circuit according to claim 1 , wherein the arithmetic control circuit uses a grinding wheel to remove the spectacle lens from a correction optical center and a target lens shape based on the correction processing data and dimension data of the suction jig shape. An apparatus for determining whether or not processing is possible, wherein it is determined whether or not the lens suction jig interferes with the grinding wheel when grinding.