JP6439361B2 - A bevel or groove formation data setting device and a bevel or groove formation data setting program - Google Patents

Description

  The present disclosure relates to a bevel or groove formation data setting device and a bevel or groove formation data setting program for setting data for forming a bevel or groove for supporting a spectacle lens on a rim of a spectacle frame on a lens edge.

  Various methods have been proposed as a bevel or groove setting method for supporting a spectacle lens on a rim of a spectacle frame (see Patent Documents 1, 2, and 3). For example, the formation curve of the bevel (or including the groove, the same applies hereinafter) is set based on the frame curve of the spectacle frame or the front curve of the spectacle lens, and the position of the half of the thinnest part of the lens edge is formed. There is known a method of setting so as to pass. There is also known a method for setting the position of the bevel at a position obtained by dividing the edge thickness of the lens at a certain ratio. Further, a method is known in which the formation curve is inclined with reference to a certain position while maintaining the bevel formation curve.

  By the way, in the past, the setting position of the bevel (or the case including the groove, the same applies hereinafter) with respect to the edge of the lens is set individually for the right lens and the left lens. For example, after holding the right lens on the lens holding shaft of the processing device and measuring the lens shape of the right lens, the bevel formation position of the right lens is determined based on the measurement result, and the periphery of the right lens is processed. It was. Next, hold the left lens on the lens holding shaft and measure the lens shape of the left lens as well as the right lens, then determine the bevel formation position of the left lens based on the measurement result, and determine the periphery of the left lens I was processing.

Japanese Patent Laid-Open No. 10-277901 Japanese Patent Laid-Open No. 11-070451 JP 2014-136287 A

  However, when the types of the left lens and the right lens are different, the edge shape of the left and right lenses may be greatly different. For example, when the refractive power (refractive power) of the left lens and that of the right lens are greatly different, the difference in edge thickness between the left and right lenses becomes large. In this case, with the method in which the bevel formation position is individually set with the left and right lenses, a balanced finish between the left and right is not obtained. For example, the positional relationship between the rim and the edge of the lens in a state where the lens is supported by the left and right rims is different on the left and right, and there is a problem that the appearance is lowered.

  The present disclosure provides a bevel or groove formation data setting device and a bevel or groove formation data setting program capable of setting a bevel or groove that makes the left and right lenses look good when supported by a rim. This is a technical issue.

In order to solve the above problems, the present invention is characterized by having the following configuration.
(1) A bevel or groove formation data setting device provided by an exemplary embodiment of the present disclosure is for setting data for forming a bevel or groove for supporting a spectacle lens on a rim of a spectacle frame on the edge of the lens. A bevel or groove formation data setting device for obtaining a lens shape of the front surface of each of the left and right lenses, and a bevel or groove formed on the edge of the right lens based on the acquired lens shape of the right lens Forming position setting means for setting a temporary second forming position of a bevel or groove formed on the edge of the left lens based on the acquired lens shape of the left lens; An adjusting means for adjusting at least one of the first forming position and the second forming position in the edge thickness direction of the lens, wherein at least a radial angle in the lens shape of the lens At one position, adjust the balance regarding the difference between the first distance of the first forming position relative to the lens front surface of the right lens and the second distance of the second forming position relative to the lens front surface of the left lens , or from the rim Adjusting means for adjusting a balance relating to a difference between the first protrusion distance of the front surface of the right lens and the second protrusion distance of the front surface of the left lens from the rim .
(2) A bevel or groove formation data setting program provided by an exemplary embodiment of the present disclosure provides a bevel or groove formation data for generating a bevel or groove formation data for supporting a spectacle lens on a rim of a spectacle frame. A bevel or groove formation data setting program executed by the groove formation data setting device, which is executed by the processor of the bevel or groove formation data setting device to obtain the front lens shape of each of the left and right lenses Based on the acquired lens shape of the right lens, the provisional first formation position of the bevel or groove formed on the edge of the right lens is set based on the acquired lens shape of the right lens, and based on the acquired lens shape of the left lens A formation position setting step for setting a temporary second formation position of a bevel or groove formed on the edge of the left lens; An adjustment step of adjusting at least one of the first forming position and the second forming position in the thickness direction, wherein the first lens position relative to the lens front surface of the right lens is at least one position of the radial angle of the lens lens. The balance of the difference between the first distance of the first forming position and the second distance of the second forming position with respect to the lens front surface of the left lens is adjusted, or the first protrusion distance of the right lens front surface from the rim and the rim An adjustment step for adjusting a balance relating to a difference between the second protrusion distance of the front surface of the left lens and the formation data setting device.

  According to the present disclosure, it is possible to improve the appearance of the left and right lenses supported by the rim.

It is a schematic block diagram of the process mechanism part which an eyeglass lens processing apparatus has. It is a figure which shows the example of the processing tool of a 1st processing tool unit. It is a schematic block diagram of a 2nd processing tool unit. It is a schematic block diagram of a lens shape measurement unit. 1 is a schematic configuration diagram of a formation data setting device and a schematic configuration block diagram of an electric system in a processing device. It is a flowchart of apparatus operation | movement. It is an example of a screen for inputting layout data. It is a flowchart of the automatic adjustment process of a bevel position. It is a figure explaining the setting of the observation point which attaches importance to the appearance of the positional relationship between a rim and a lens edge. It is explanatory drawing of the temporary bevel position set to the left-right lens. This is an example in which the right bevel position is moved to the lens front side with respect to FIG. It is a figure which shows the example changed so that the bevel curve of the right bevel position may become loose. It is a figure which shows the example which inclined the bevel curve of the right bevel position. It is a figure which shows the example of a screen when manual adjustment mode is selected. It is the example which added the shape of the rim | limb to the display of the side surface shape of FIG.

<Overview>
One exemplary embodiment will be described with reference to FIGS. FIGS. 1 to 15 are diagrams for explaining a spectacle lens processing device, a bevel or groove formation data setting device, and a bevel or groove formation data setting program according to the embodiment.

  The eyeglass lens processing apparatus according to the embodiment includes, for example, a lens holding unit (for example, the lens holding shaft 102) and a processing tool for processing the periphery of the lens (for example, a processing tool 164 for processing a bevel on the lens periphery). Or a grooving tool 436) for processing grooves on the periphery of the lens, and a lens shape measuring unit 200.

  Further, the bevel or groove formation data setting device according to the embodiment adjusts the information acquisition means, the formation position setting means for setting the temporary formation position of the bevel or groove, and the temporary formation position of the bevel or groove. Adjusting means for performing. The formation data setting device may be provided in the eyeglass lens processing device.

  For example, the information acquisition unit includes a lens shape acquisition unit. For example, the lens shape acquisition unit includes a lens shape measurement unit 200 and a control unit 50. For example, the lens shape measuring unit 200 is used to measure positions corresponding to the lens shapes of the front and rear surfaces of the lens held on the lens holding shaft 102. Then, the control unit 50 obtains the front and rear lens shapes of the left and right lenses based on the measurement result of the lens shape measurement unit 200 before processing the left and right lenses. The lens shape acquisition means does not directly measure the front and rear surfaces of the lens by the lens shape measurement unit 200, but the lens shape of the left and right lenses, the refractive power of the lenses, the astigmatic axis angle of the left and right lenses, and the center thickness of the left and right lenses. Based on data such as curve information on the front and rear surfaces of the left and right lenses, the positions corresponding to the target lens shapes of the front and rear surfaces of the left and right lenses may be obtained by calculation.

  For example, the formation position setting unit includes a control unit 50. For example, the control unit 50 calculates a temporary formation position of a bevel or a groove formed on the edge of the left and right lenses based on the acquired information of the lens shape of the left and right lenses or based on the acquired information of the lens shape and the frame curve. . Alternatively, for example, the formation position setting means may be configured such that the operator sets temporary curve information on the bevel or groove by using the display 500 as an example of the display means.

  Further, for example, the adjusting means includes a control unit 50. For example, the control unit 50 determines at least one position (for example, a radial angle of the lens) as an observation point that places importance on the appearance of the positional relationship between the rim and the edge of the lens when the lens is supported on the rim. For example, the control unit 50 determines the position as the observation point based on the target lens shape (for example, the distance of the outer diameter with respect to the optical center of the lens). Then, the control unit 50 adjusts at least one of the right lens bevel or groove temporary first formation position set by the formation position setting means and the left lens bevel or groove temporary second formation position. To do. For example, the control unit 50 may detect the first distance of the first formation position of the bevel or groove relative to the lens front surface of the right lens and the second distance of the second formation position of the bevel or groove relative to the lens front surface of the left lens at the observation point. And adjust the balance. For example, the control unit 50 moves the bevel or groove formation position of the left and right lenses in the direction of the edge thickness (the front and rear directions of the lens), and the difference between the first distance and the second distance is within an allowable range (A1). Adjust in.

  Alternatively, the control unit 50 may adjust the balance between the first protrusion distance of the front surface of the right lens from the rim and the second protrusion distance of the front surface of the left lens from the rim at the observation point. For example, the control unit 50 moves the first formation position and the second formation position in the edge thickness direction, and adjusts the difference between the first protrusion distance and the second protrusion distance within the allowable range (A2). You may do it. In addition, the protrusion distance described above is, in other words, the distance at which the lens front surface protrudes from the rim. Thereby, even when the edge thickness of the left and right lenses is greatly different, the appearance of the positional relationship between the edge of the lens supported by the rim and the rim can be balanced with the left and right lenses.

  In addition, the control unit 50 as an example of the adjusting means adjusts the first forming position and the second forming position so that the first distance and the second distance are within the third allowable range (A3) as adjustment of the balance between the first forming position and the second forming position. You may do it. Or as adjustment of the balance of a 1st formation position and a 2nd formation position, you may adjust so that the above-mentioned 1st protrusion distance and 2nd protrusion distance may become in 4th tolerance (A4). . Thereby, the protrusion distance of the lens front surface from the rim can be reduced, and the appearance can be improved.

  In addition, the control unit 50 as an example of the adjustment unit may perform an adjustment to change at least one of the curve values of the first curve at the first formation position and the second curve at the second formation position as necessary. unknown. For example, the control unit 50 adjusts the curve so that the difference between the first curve and the second curve is within the sixth allowable range (A6). By limiting the difference between the first curve and the second curve on the left and right, it is possible to suppress a decrease in appearance.

  Further, the control unit 50 as an example of the adjusting means may perform an adjustment to incline at least one of the first curve of the first formation position and the second curve of the second formation position as necessary. For example, the control unit 50 limits the difference between the inclination amount of the first curve and the inclination amount of the second curve to the seventh allowable range (A7). If the difference in the slope of the curve between the left and right lenses becomes too large, the balance between the left and right sides may be deteriorated. By limiting the amount of inclination of the first curve and the second curve on the left and right, deterioration in appearance can be suppressed.

  In addition, the above-mentioned permissible range (A1-A7) is, for example, a value determined empirically from the viewpoint of appearance.

  In addition, for example, the adjustment unit described above is a display control unit (for example, a display control unit that controls display on the display 500, which is an example of the display unit) so that the operator can adjust the first formation position and the second formation position. Control unit 50).

  For example, the control unit 50 determines the right edge cross-sectional shape of the edge of the right lens after processing the bevel or the groove based on the information set by the formation position setting unit and based on the information acquired by the lens shape acquisition unit. It is displayed on the screen of the display means so that the cross-sectional shape of the left edge of the left lens can be compared. The control unit 50 includes the right edge cross-sectional shape at the respective radial angles of the lens shape of the right lens and the left lens specified by the specifying means (for example, the cursors 530R and 530L displayed on the screen 520 of the display 500) and the left The cross-sectional shape of the edge is displayed on the screen, and each of the first formation position of the right lens and the second formation position of the left lens input by the adjustment data input means (for example, the input fields 553R and 553L of the screen 520) is adjusted. The display state of the right edge cross-sectional shape and the left edge cross-sectional shape is changed based on the data.

  Thus, the operator determines an observation point that places importance on the appearance while observing the left and right edge cross-sectional shapes, and balances the first formation position and the second formation position for each of the left and right lenses at the observation point. The balance between the first distance and the second distance can be adjusted. Alternatively, the operator can adjust the balance between the first protrusion distance and the second protrusion distance of the lens front surface from the rim.

  For example, the control unit 50 displays the right rim cross-sectional shape on the screen together with the right edge cross-sectional shape corresponding to the above-described first forming position, and the left rim cross-sectional shape of the left rim corresponds to the above-described second forming position. It may be displayed on the screen together with the left edge cross-sectional shape. By displaying the cross-sectional shape of the rim together, the operator can easily visually grasp the protruding state of the lens front surface from the rim.

  For example, the control unit 50 is a state in which the edge of the right lens after processing the bevel or the groove is viewed from the side based on the information set by the formation position setting unit and based on the information acquired by the lens shape acquisition unit. The right edge side surface shape of the left lens and the left edge side surface shape when the edge of the left lens is viewed from the side surface may be displayed on the screen of the display means so as to be comparable. The control unit 50 includes the right edge side surface shape and the left edge side surface in the respective observation directions of the lens shape of the right lens and the left lens specified by the specifying means (for example, the cursors 530R and 530L displayed on the screen 520 of the display 500). The shape is displayed on the screen, and the adjustment data input means (for example, input fields 553R and 553L on the screen 520) input the adjustment data for the first formation position of the right lens and the second formation position of the left lens, respectively. Based on this, the display state of the right edge side shape and the left edge side shape is changed. By the display of the edge side surface shape, the formation state of the C bevel or the groove can be grasped more easily.

  In addition, the control unit 50 displays the right rim side view in a state in which the right rim is viewed from the side, superimposed on the right edge side shape corresponding to the first formation position, and displays the left rim from the side. The left rim side surface figure in the state may be displayed on the screen so as to overlap with the left edge side shape corresponding to the second formation position. By displaying the shape of the side surface of the rim together, the operator can easily visually grasp the protruding state of the front surface of the lens from the rim, and can easily adjust the bevel or groove forming position of the left and right lenses.

  In addition, the control unit 50 provides opening angle change information to the temples of the eyeglass frame based on the adjustment data input by the curve adjustment data input means (for example, the input fields 551R and 551L and the input fields 555R and 555L of the screen 520). May be displayed on the screen. For example, the adjustment data is at least one of first adjustment data and second adjustment data. The first adjustment data is data for changing the size (for example, curve value) of at least one of the first curve at the first formation position and the second curve at the second formation position. The second adjustment data is data for inclining at least one of the first curve and the second curve.

  Thereby, the operator can know the degree of change of the opening angle of the temple, and when the size of the first curve and the second curve is changed, or when the inclination of the curve is changed, the opening of the temple is changed. It can be easily determined whether there is no problem in correcting the corner.

The data setting program for creating the bevel or groove formation data according to the embodiment is executed by, for example, a processor included in the control unit 50. For example, the data setting program includes a lens shape acquisition step, a formation position setting step for setting temporary first and second formation positions of the bevels or grooves of the left and right lenses, and the first formation position and the first formation position described above. 2 and an adjustment step of adjusting at least one of the formation positions. For example, the lens shape acquisition step can use the configuration of the lens shape acquisition unit, the formation position setting step can use the formation position setting unit, and the adjustment step can use the configuration of the adjustment unit.
<Example>
In the following, one exemplary embodiment will be described with reference to the drawings. FIG. 1 is a schematic configuration diagram of a processing mechanism unit included in the eyeglass lens processing apparatus 1 of the embodiment.

  An eyeglass lens processing apparatus 1 (hereinafter, processing apparatus 1) according to an embodiment includes a lens holding unit 100, a lens shape measurement unit 200, a first processing tool unit 150, a moving unit 300, and a second processing tool unit 400. And a bevel or groove formation data setting device 1A (see FIG. 5). The lens holding unit 100 is configured to pinch (hold) a spectacle lens LE (hereinafter referred to as a lens LE) and rotate it. The first processing tool unit 150 is configured to rotate a processing tool that processes the periphery of the lens LE. The second processing tool unit 400 has a processing tool different from the processing tool of the first processing tool unit 150 and is configured to rotate the processing tool that processes the periphery of the lens LE. The moving unit 300 is configured to adjust the relative positional relationship between the lens holding shaft that holds the lens LE and the processing tools included in the first processing tool unit 150 and the second processing tool unit 400.

<Lens holding unit 100>
The lens holding unit 100 according to the embodiment is configured as follows. The lens holding unit 100 includes a lens holding shaft 102 for holding (rotating) and rotating the lens LE, and a carriage 101. For example, the lens holding shaft (shaft) 102 includes a pair of lens chuck shafts 102L and 102R. A lens chuck shaft 102L is rotatably held by a left arm 101L provided in the carriage 101. A lens chuck shaft 102R is rotatably held by a right arm 101R included in the carriage 101. The lens chuck shafts 102L and 102R are located on the same axis. For example, the lens chuck shaft 102R is moved to the lens chuck shaft 102L side by the motor 110 attached to the right arm 101R. Thereby, the lens LE is held by the two lens chuck shafts 102L and 102R. A motor 112 is attached to the left arm 101L. The rotation of the motor 112 is transmitted to the lens chuck shafts 102L and 102R via a rotation transmission mechanism such as a gear. By rotating the motor 112, the lens chuck shafts 102L and 102R are rotated in synchronization. As a result, the lens LE is rotated around the axis center of the lens chuck shafts 102L and 102R. The lens holding unit 100 is also used as a lens rotation unit.

  As a configuration for rotating the lens LE, a motor for rotating the lens chuck shaft 102L and a motor for rotating the lens chuck shaft 102R may be provided. In this case, each motor is controlled to rotate synchronously.

<First processing tool unit 150>
The first processing tool unit 150 includes a motor 160 for rotating a processing tool rotating shaft (shaft) 161. The motor 160 is attached to the main body base 10. The processing tool rotating shaft 161 is rotatably held by the main body base 10 in a positional relationship parallel to the lens holding shaft 102 (lens chuck shafts 102L and 102R). A plurality of processing tools 168 for processing the peripheral edge of the lens LE are attached to the processing tool rotating shaft 161.

  FIG. 2 is an example of the processing tool 168 attached to the processing tool rotating shaft 161. For example, the processing tool 168 includes a front bevel processing tool 162, a rear bevel processing tool 163, a normal finishing processing tool 164, a mirror finish processing tool 165, and a rough processing tool 166. In the embodiment, a grindstone is used as the processing tools 162 to 166, but a cutter may be used.

  The roughing tool 166 is used for roughing the periphery of the lens LE. The normal finishing tool 164 has a V groove 164V and a flat finishing surface 164a for forming a normal bevel on the low-curve lens LE. A front bevel and a rear bevel are simultaneously formed on the periphery of the low curve lens by the V groove 164V. The mirror finish processing tool 165 is used for further specular finishing of the lens periphery finished by the normal finish processing tool 164. The rear beveling tool 163 is used to form a rear bevel around the periphery of the high-curve lens LE. The front beveling tool 162 is used to form a front bevel around the periphery of the high-curve lens LE.

<Second processing tool unit 400>
For example, in FIG. 1, the second processing tool unit 400 is disposed behind the carriage 101. FIG. 3 is a schematic configuration diagram of the second processing tool unit 400. A fixing plate 401 serving as a base of the second processing tool unit 400 is fixed to a block (not shown) standing on the base 170 in FIG. A rail 402 extending in the Z-axis direction (direction orthogonal to the XY-axis plane) is fixed to the fixed plate 401, and a Z-axis movement support base 404 is slidably attached along the rail 402. The moving support base 404 is moved in the Z-axis direction when the motor 405 rotates the ball screw 406. A rotating support base 410 is rotatably held on the moving support base 404. The rotation support base 410 is rotated around its axis by a motor 416 via a rotation transmission mechanism.

  A rotating portion 430 is attached to the distal end portion of the rotating support base 410. A rotating shaft 431 orthogonal to the axial direction of the rotating support base 410 is rotatably held by the rotating portion 430. A hole machining tool (for example, an end mill) 435 is coaxially attached to one end of the rotating shaft 431. Further, a grooving tool 436 (for example, a cutter or a grindstone is used) is coaxially attached to the other end of the rotating shaft 431. The rotating shaft 431 is rotated by a motor 440 attached to the moving support base 404 via a rotation transmission mechanism disposed inside the rotating unit 430 and the rotation support base 410. In the present embodiment, the hole machining tool 435 is directed to the front surface of the lens, and the hole is machined from the front side of the lens.

<Mobile unit 300>
The moving unit 300 is configured to adjust the relative positions of the lens holding shaft 102 (lens chuck shafts 102L and 102R) and the processing tool 168, the digging processing tool 436, and the like. In the processing apparatus 1 of the embodiment, the moving unit 300 includes a first moving unit 310 that varies the distance between the lens holding shaft 102 and the processing tool rotating shaft 161 and the rotating shaft 431, and the axial direction of the lens holding shaft 102. And a second moving unit 330 for moving the lens LE. In the embodiment, the axial direction of the lens holding shaft 102 is the X axis. The direction in which the distance between the lens holding shaft 102, the processing tool rotation shaft 161, and the rotation shaft 431 varies is the Y-axis direction.

  The first moving unit 310 includes a motor 315 that is an example of a drive source for moving the carriage 101 (the lens holding shaft 102 and the lens LE) in the X-axis direction. For example, the carriage 101 is mounted on the movement support base 301. The movable support base 301 is held by the base 10 so as to be movable in the X-axis direction along shafts 313 and 314 extending in parallel with the X-axis direction. A ball screw (not shown) extending in parallel with the shaft 313 is attached to the moving support base 301. The ball screw is rotated by a motor 315. When the motor 315 is rotated, the moving support base 301 is moved in the X-axis direction via a rotation transmission mechanism such as a ball screw. When the moving support base 301 is moved in the X-axis direction, the lens holding shaft 102 is moved in the X-axis direction, and the range LE is also moved in the X-axis direction. A detector 316 that detects the position of the lens holding shaft 102 in the X-axis direction is attached to the rotation shaft of the motor 315. Note that the first moving unit 310 may move the processing tool rotating shaft 161 in the X-axis direction. That is, the first moving unit 310 may be configured to relatively change the positional relationship between the lens LE and the processing tool 168 in the X-axis direction.

  The second moving unit 330 includes a motor 335 that is an example of a drive source for moving the carriage 101 (lens holding shaft 102) in the Y-axis direction. Shafts 333 and 334 extending in the Y-axis direction are fixed to the moving support base 301. The carriage 101 is held by the movement support base 301 so as to be movable in the Y-axis direction along the shafts 333 and 334. The motor 335 is attached to the moving support base 301. The rotation of the motor 335 is transmitted to a ball screw 337 extending in the Y-axis direction, and the carriage 101 (that is, the lens holding shaft 102 and the lens LE) is moved in the Y-axis direction by the rotation of the ball screw 337. A detector 336 that detects the position of the lens holding shaft 102 in the Y-axis direction is attached to the motor 335.

  In the embodiment, the second moving unit 330 is configured to move the lens holding shaft 102 in the Y-axis direction, but may be configured to move the processing tool rotating shaft 161 and the rotating shaft 431 in the Y-axis direction. That is, the second moving unit 330 may be configured to relatively change the distance between the lens holding shaft 102 and the processing tool rotating shaft 161 and the rotating shaft 431.

<Lens shape measurement unit>
In FIG. 1, a lens shape measurement unit 200 is disposed above the carriage 101. The lens shape measuring unit 200 is used to measure the shape of the lens front surface (front refracting surface) and the shape of the lens rear surface (back refracting surface) of the lens LE. The lens shape measurement unit 200 includes, for example, a lens front surface shape measurement unit 200F and a lens rear surface shape measurement unit 200R.

  FIG. 4 is a schematic configuration diagram of a lens front surface shape measurement unit 200F (hereinafter abbreviated as measurement unit 200F). The measurement unit 200F has a probe 206F that contacts the front surface of the lens. The measuring element 206F is attached to the tip of the arm 204F. The arm 204F is held by the mounting support base 201F so as to be movable in the X-axis direction (the axial direction in which the lens chuck shafts 102L and 102R extend). The arm 204F is connected to the motor 216F via a rack 211F, a pinion 212F, a gear 214F, and the like. By driving the motor 216F, the arm 204F is moved in the X-axis direction, and the measuring element 206F is pressed against the front surface of the lens LE. The pinion 212F is attached to the rotation shaft of the detector 213F (for example, an encoder). The position of the probe 206F moved in the X-axis direction is detected by the detector 213F.

  The configuration of the lens rear surface shape measurement unit 200R (hereinafter, abbreviated as measurement unit 200R) is symmetrical with the measurement unit 200F, and thus the description thereof is omitted. The measuring unit 200R includes a measuring element 206R that is in contact with the rear surface of the lens, a motor 216R that moves the measuring element 206R in the X-axis direction, and a detector 213R that detects a movement position of the measuring element 206R in the X-axis direction. .

  When measuring the lens shape, the probe 206F is brought into contact with the front surface of the lens, and the probe 206R is brought into contact with the rear surface of the lens. In this state, the lens LE is rotated by the lens holding unit 100, and the lens chuck shafts 102L and 102R are moved in the Y-axis direction by the moving unit 300 based on the lens shape data, whereby the lens front surface corresponding to the lens shape. And the lens shape of the rear surface of the lens are measured simultaneously. That is, the edge position of the lens front surface corresponding to the target lens shape is measured by the measurement unit 200F, and the edge position of the rear lens surface corresponding to the target lens shape is measured by the measurement unit 200R.

<Schematic configuration of electrical system>
FIG. 5 is a schematic configuration diagram of the bevel or groove formation data setting device 1 </ b> A and a schematic configuration block diagram of an electrical system in the processing device 1. For example, the formation data setting device 1 </ b> A mainly includes a control unit 50, a display (input unit) 500, and a memory 51. For example, the display (input unit) 500 has a touch panel function. However, an input device such as a keyboard may be used for data input. The memory 51 stores a bevel or groove formation data setting program executed by the control unit 50.

  The processing apparatus 1 of the embodiment is configured to include a formation data setting apparatus 1A. The control unit 50 of the embodiment also serves as a control unit in the processing apparatus 1. The control unit 50 also serves as an arithmetic unit for calculating machining data and the like. Furthermore, the control unit 50 also serves as a data acquisition unit that acquires data necessary for operations such as machining data. The control unit 50 includes a CPU (processor), a RAM, a ROM, and the like. Further, the display 500, the memory 51, and the like also serve as components of the processing apparatus 1. The control unit 50 controls each drive mechanism of each unit 100, 150, 200, 400 in the processing apparatus 1.

Further, the control unit 50 includes a switch panel 10 of the processing apparatus 1,
A spectacle frame shape measuring device 20 is connected to the control unit 50. The spectacle frame shape measuring device 20 measures the left and right rims of the spectacle frame, the frame curve of the spectacle frame, and the like.

<Operation of the device>
Next, operations of the processing apparatus 1 and the formation data setting apparatus 1A having the above-described configuration will be described (see the apparatus operation flowchart in FIG. 6).

  Prior to lens processing, the lens data of the left and right lenses is acquired by the control unit 50 as one of the information acquisition processes (S1). For example, in the lens shape data, the shape of the left and right rims of the spectacle frame is measured by the spectacle frame shape measuring device 20, and the target lens shape TD (Trn, Tθn) (n = 1, 2) for setting the bevel formed on the periphery of the lens. , 3,..., N) are acquired. For example, Tθn of the target lens shape TD is the radial angle data of the target lens shape based on the geometric center of the target lens shape TD (the holding center of the lens LE by the lens holding shaft 102). Trn is radial length data for each radial angle Tθn with reference to the geometric center of the target lens TD. In addition, the target lens shape TD for setting a groove formed on the peripheral edge of the lens is acquired by measuring the outer diameter of the demo lens attached to the spectacle frame by the spectacle frame shape measuring device 20. It is also possible to obtain the other target lens shape TD by reversing the right and left target lens shape TD. The left and right target lens shapes TD (or the left and right target lens shapes) are stored in the memory 51.

  Further, as one of the information acquisition processes, the rim curve data of the spectacle frame is acquired by the control unit 50. The rim curve data (hereinafter referred to as frame curve FR) is acquired by measuring the rim by the spectacle frame shape measuring apparatus 20. The frame curve FR is stored in the memory 51.

  Further, as one of the information acquisition processes, the thickness of the rim of the spectacle frame (hereinafter referred to as “rim thickness”) may be acquired. For example, the operator can measure the rim of the spectacle frame with a measuring instrument and input the measured value through the display 500. Alternatively, the spectacle frame shape measuring apparatus 20 may be provided with a function of measuring the rim thickness, and measurement data of the spectacle frame shape measuring apparatus 20 may be input to the control unit 50.

  Further, layout data is acquired as one of information acquisition processes. For example, the layout data is positional relationship data of the optical center of the lens LE with respect to the geometric center TC of the target lens TD. For example, when the left and right target TDs are acquired, a screen 510 for the operator to input layout data is displayed on the display 500. FIG. 7 is an example of the screen 510. On the screen 510, a figure TGR of the right lens TD of the right lens and a figure TGL of the left lens TD of the left lens are displayed. In FIG. 7, TCR indicates the geometric center of the right target TD, and TCL indicates the geometric center of the left target TD. OCR indicates the optical center of the right lens, and OCL indicates the optical center of the left lens. As the raised data, the geometrical center distance FPD of the left and right eyeballs, the inter-pupil distance PD of the left and right eyes of the wearer, and the height data CH of the optical center of the lens with respect to the geometrical center (TCR, TCL) are input. Is done.

  Here, the processing apparatus 1 according to the embodiment can select a first processing mode and a second processing mode described below by a switch 502 (see FIG. 5) as an example of mode selection means (S2). In the first processing mode, in order to form a bevel (or groove) on the periphery of the lens, the left and right lenses are sequentially held by the lens holding shaft 102, and the bevel (or groove) is formed individually for the left and right lenses. In this mode, the position is set and processed sequentially. The second processing mode is a mode in which the lens shapes of the front and rear surfaces of the left and right lenses are acquired and then adjusted and processed so as to balance the positions of the bevels (or grooves) formed on the peripheral edges of the left and right lenses. . Hereinafter, a case where a bevel is formed on the edge of the lens will be described as an example. When the groove is formed on the edge of the lens, the processing is basically the same, so that the description of the groove formation is omitted by replacing “bevel” with “groove” below.

  The first machining mode will be briefly described. The first processing mode is the same processing method as in the prior art. In the first processing mode, one of the left and right lenses is held by the lens holding shaft 102. For example, the right lens is processed first. Then, with respect to the right lens, the lens shape (the shape of the front and rear surfaces of the lens) corresponding to the edge position corresponding to the target lens shape TD is measured by the lens shape measuring unit 200 to obtain the lens shape of the right lens (S3). . By acquiring the lens shape, the edge thickness (edge thickness) of the lens for each radius angle is acquired. Based on the acquired edge thickness of the right lens, the control unit 50 performs a calculation for setting the bevel position (S4). Various known methods can be used to set the bevel position. For example, first, a bevel curve is determined so as to follow a frame curve acquired in advance. Next, the bevel position is set with respect to the entire circumference of the lens edge (periphery) by arranging the bevel curve so that the bevel apex is located at a position where the radius is the smallest at the edge thickness and half the edge thickness. There is also a method of setting the bevel position so that the bevel passes through the position obtained by dividing the edge thickness by a predetermined ratio. Alternatively, as disclosed in Japanese Patent Application Laid-Open No. 2014-136287, a bevel curve is set based on the frame curve FR, a temporary bevel position is set based on the bevel curve, and then the front position of the lens and the bevel apex position are targets. There is also a method of correcting the bevel curve so as to approach the value.

  After determining the bevel position of the right lens, the control unit 50 controls the driving of the moving unit 300 based on the setting information of the target lens shape TD and the bevel position, and the peripheral edge of the right lens held by the lens holding shaft 102 is determined. For example, the roughing tool 166 and the finishing tool 164 are used (S5).

  When the processing of the right lens is completed, the operator holds the left lens, which is the other lens, on the lens holding shaft 102, and causes the lens shape measuring unit 200 to measure the lens shape of the left lens (S6). Then, the control unit 50 sets the bevel position of the left lens based on the measurement result of the lens shape as in the case of the right lens (S7), and the peripheral edge of the left lens is processed by the roughing tool 166 and the finishing tool 164. (S8).

  As described above, the first processing mode is a processing method for setting the bevel position for each of the left and right lenses, and is applied when there is no significant difference in the edge thickness of the left and right lenses. In the first processing mode, the left and right lenses to be held by the lens holding shaft 102 need to be exchanged less than the second processing mode described later, and the processing can be performed efficiently.

  An example of the second processing mode will be described. The second processing mode is suitably applied, for example, when there is a large difference in the edge thickness of the left and right lenses. Or it may be applied when the shape in the edge direction differs between the left and right lenses due to the difference in the type of lens.

  First, an example in which the control unit 50 automatically sets the bevel or groove position according to the data setting program will be described. Prior to machining, the point of obtaining the target lens shape TD, the frame curve FR, the rim thickness, the layout data, and the like is obtained as the information obtaining process, as in the first machining mode. Hereinafter, a case where a bevel is formed will be described as an example.

  The operator first selects the left or right lens to be held on the lens holding shaft 102 by the left / right selection switch 12 which is an example of a left / right lens selection unit. The left / right selection switch 12 is disposed on the switch panel 10 (see FIG. 5). For example, first, the right lens is held on the lens holding shaft 102. When the operator presses the start switch 14 disposed on the switch panel 10, an operation start signal of the apparatus is input to the control unit 50.

  The control unit 50 controls the driving of the lens shape measuring unit 200 and the moving unit 300, measures the front and rear lens surface shapes of the right lens corresponding to the right target lens shape, and obtains shape data thereof. When the measurement of the right lens (acquisition of the lens shape of the right lens) is completed, the control unit 50 temporarily stops the operation of the apparatus, and causes the lens holding shaft 102 to hold the other left lens instead of the right lens. , A message to that effect is displayed on the display 500.

  The operator removes the right lens from the lens holding shaft 102 and causes the lens holding shaft 102 to hold the left lens. When the start switch 14 is pressed, an operation start signal of the apparatus is input to the control unit 50. As in the case of the right lens, the control unit 50 controls the driving of the lens shape measuring unit 200 and the moving unit 300, measures the front and rear lens surface shapes of the left lens corresponding to the left target lens shape, and the shape. Data is obtained (S11). The lens shape data of the left and right lenses is stored in the memory 51.

  When the lens shapes of the left and right lenses are acquired, the control unit 50 considers the difference in edge thickness between the left and right lenses based on the bevel or groove data setting program, and the bevel position (the bevel apex position) with respect to the edge thickness of the left and right lenses. ) Is automatically adjusted to arrange in a balanced manner (S12).

  The bevel position automatic adjustment process in the bevel or groove data setting program of the embodiment will be described below with reference to FIGS. FIG. 8 is a flowchart of a bevel position automatic adjustment process.

  FIG. 9 shows the shapes of the right lens shape TDR and the left lens shape TDL of the left and right lenses acquired by the lens shape acquisition means. The control unit 50 determines an observation point of a portion that places importance on the appearance of the positional relationship between the rim and the edge of the lens when the lens is supported on the rim for the left and right target lens shapes TDR and TDL (S21).

  For example, when the lens is supported on the rim, the portion where importance is attached to the appearance of the lens edge protruding from the rim is a portion where the lens edge is thickest in the nose side direction. For this reason, a point TR having the largest radius from the optical center OCR of the lens in the right target TDR is determined as an observation point. Similarly, a point TL having the largest radius from the optical center OCL of the lens is determined in the left target TDL. Note that at least one observation point is sufficient. However, a plurality of observation points may be provided. For example, an observation point on the ear side of the lens may be additionally set. As the ear-side observation point in the right target TDR, the ear-side point NR in the horizontal direction of the point TR may be determined. Similarly, the ear-side point NL in the horizontal direction of the point TL may be determined as the ear-side observation point in the left target TDL.

  Next, the control unit 50 sets a temporary bevel formation position (hereinafter referred to as a bevel position) for the edge of the right lens and the left lens (S22). For example, the initial value of the bevel curve when the bevel position is arranged over the entire periphery of the lens edge is common to the left and right lenses, and is a value that matches the frame curve FR acquired in advance. Further, the position of the top of the bevel arranged on the edge is set so as to pass through a position that is half the edge thickness of the thinnest part based on the edge thickness of the lens obtained by acquiring the lens shape, for example. Accordingly, as shown in FIG. 10, a temporary right bevel position (bevel formation position) YR1 with respect to the edge of the right lens LER is set, and a temporary left bevel position (bevel formation position) YL1 with respect to the edge of the left lens LRL. Is set. For example, the data of the bevel positions YR1 and YL1 are set as three-dimensional data of (Yrn, Yθn, Yzn) (n = 1, 2, 3,..., N). Yrn is radial length data based on the geometric center of the target lens shape, Yθn is radial angle data based on the geometric center of the target lens shape, and Yzn is distance data in the edge thickness direction (for example, a lens holding axis). 102 is distance data with respect to a reference position in the axial direction). FIG. 10 shows an example in which the edge of the right lens LER is thicker than the left lens LRL. FIG. 10 schematically shows the edge state of the lens.

  Next, the control unit 50 obtains the distance BR between the bevel apex at the observation point TR and the lens front surface based on the right bevel position YR1 and the lens shape of the right lens. Further, the control unit 50 obtains a distance BL between the bevel apex at the observation point TL and the lens front surface based on the left bevel position YL1 and the lens shape of the left lens (S23). Then, the control unit 50 adjusts the movement of at least one of the right bevel position YR1 and the left bevel position YL1 in the edge thickness direction (the direction of the front and rear surfaces of the lens) so as to balance the distance BR and the distance BL. (S24). For example, the control unit 50 compares the distance BR and the distance BL, and sets at least one of the right bevel position YR1 and the left bevel position YL1 in the edge thickness direction so that the difference between the distance BR and the distance BL falls within the allowable range A1. The adjustment process to move to is performed. For example, the distance BR and the distance BL are compared, and the right bevel position YR1 or the left bevel position YL1 is moved to the lens front side so as to match the shorter distance. The permissible range A1 is a value set to improve the balance of the amount that the front surface of the lens protrudes from the rim of the left and right lenses, and is 0.2 mm, for example. As a result, even when the edge thickness differs greatly between the left and right lenses, the right and left balance can be improved in the portion where the appearance is important.

  If the rim thickness is obtained instead of using the difference between the distance BR and the distance BL as a reference for adjustment, the first protrusion of the front surface of the right lens from the rim at each observation point TR and TL is obtained. Based on the difference between the distance and the second protrusion distance of the front surface of the left lens from the rim, the right bevel position YR1 and the left are adjusted so as to balance the first protrusion distance and the second protrusion distance. At least one of the bevel positions YL1 may be adjusted. For example, the right bevel position YR1 and the left bevel position YR1 are set so that the difference between the first protrusion distance and the second protrusion distance falls within a preset allowable range A2 (for example, 0.2 mm). adjust. As a result, even when the edge thickness differs greatly between the left and right lenses, the right and left balance can be improved in the portion where the appearance is important.

  Further, the control unit 50 performs adjustment to move both the right bevel position YR1 and the left bevel position YR1 so that the distance BR and the distance BL are within the allowable range A3 that is determined separately from the allowable range A1 (S25). . When the edge thickness of the rim is acquired, the allowable range A3 may be set according to the edge thickness. For example, when the edge thickness of the rim is W, the allowable range A3 is 0.3 mm + W from the front surface of the lens so that the protrusion amount of the lens front surface from the rim is 0 to 0.3 mm. Set as a range of / 2. In other words, the first protrusion distance of the front surface of the right lens from the rim and the second protrusion distance of the front surface of the left lens from the rim are each within the allowable range A4 (for example, 0 to 0.3 mm). The right bevel position YR1 and the left bevel position YR1 are moved together.

  Even if the edge thickness of the actual spectacle frame is not obtained, the control unit 50 can respond to the type of material as long as it is configured to acquire the material of the spectacle frame (for example, input by the display 500). It is also possible to obtain a rim thickness W. For example, when the material is metal, the rim thickness W is 2 mm, and when the material is cell, the rim thickness W is 4 mm. Further, the allowable ranges A3 and A4 may be determined in advance by setting the rim thickness W to a fixed value (for example, 2 mm).

  Next, the control unit 50 checks whether the distance BF between the front surface of the lens and the bevel position is within the allowable range A5 for points other than the observation points TR and TL (radial angle) (that is, for points around the entire lens). . The distance BF in the left and right lenses is calculated from the acquisition results of the front surface shapes of the left and right lenses and the bevel positions (YR1, YL1) of the left and right lenses. Then, the control unit 50 determines whether the distance BF is within the allowable range A5 (S26). For example, the allowable range A5 is 0.4 mm or more. If the lower limit is 0.4 mm, the front slope of the bevel enters the groove of the rim, so that one bevel (a state in which only one of the front slope and the rear slope of the bevel is formed) can be avoided. This prevents the lens from falling off the rim.

  If the distance BF between the left and right lenses is within the allowable range A5 except for the observation points TR and TL, the control unit 50 uses the right and left bevel positions YR1 and YR1 adjusted in the above-described processing of S25 as the left and right lens positions. The bevel formation data used for processing is determined. The determined bevel formation data of the right lens and the left lens is stored in the memory 51.

  On the other hand, there is a case where the distance BF does not satisfy the allowable range A5 by the process of S25 described above. In this case, the control unit 50 targets a lens whose distance BF is out of the allowable range A5 (both left and right lenses, if the distance BF is out of the allowable range A5, both lenses are targets). Then, adjustment is performed to change the curve value of the bevel curve (the initial value is the frame curve FR in the embodiment) at the bevel position (YR1, YL1) (S27). The curve value is a method for expressing the curve shape of a lens conventionally used in the field of spectacle lenses, and is a value obtained by dividing “523” by the radius of the spherical surface constituting the curve shape.

  FIG. 11 shows an example in which the right bevel position YR1 is moved to the lens front side with respect to FIG. 10 by performing the process of S25 described above. The right lens LER in FIG. 11 is a case where the negative refractive power is stronger than the left lens LEL. Here, the front curve of the right lens LER having a strong negative refractive power may be a weak curve value with respect to the front curve of the left lens LEL having a weak negative refractive power. For example, the curve value of the front lens of the left lens LEL may be “4 curve” and the curve value of the right lens LER may be “1 curve”. Therefore, even if the bevel curve of the right lens LER is the same bevel curve as that of the left lens LEL, as shown in FIG. 11, the right bevel position YR1 approaches the lens front surface at a part of the radial angle in the right lens LER, and the distance BF may deviate from the allowable range A5.

  When the distance BF is out of the allowable range A5, the control unit 50 performs adjustment to change the bevel curve (curve value) of the right bevel position YR1 (S27). FIG. 12 is a diagram illustrating an example in which the bevel curve at the right bevel position YR1 is changed so as to be loose. The distance BF can be increased by changing the bevel curve. Then, before the bevel curve change reaches a predetermined limit (S28), the process returns to the above-described process of S23, and the processes after S23 are repeated. For example, the bevel curve is changed every predetermined step (for example, 0.1 curve value).

  The bevel curve changing process in S27 is performed until the difference in curve value between the bevel curve at the right bevel position YR1 and the bevel curve at the left bevel position YL1 is within an allowable range A6 (for example, 1.5 curve) (S28). This is because if the difference in the bevel curve between the left and right lenses becomes too large, the balance of the positional relationship between the edge and the rim of the left and right lenses supported by the rim will deteriorate and the appearance will deteriorate. In this embodiment, by providing the allowable range A6 for changing the bevel curve, it is possible to suppress a decrease in appearance.

  When the change range reaches the limit of the allowable range A6 due to the bevel curve change process of S27 (S28), the control unit 50 performs a process of adding an inclination to the bevel curve as the next process (S29).

  FIG. 13 is a diagram illustrating an example in which the bevel curve at the right bevel position YR1 is inclined. For example, the bevel curve is inclined based on the thinnest portion of the edge. Or you may make it incline on the basis of the observation point TR. Various methods can be used for setting the reference point for the inclination of the bevel curve. Further, the bevel curve is inclined in a predetermined step (for example, every 0.1 degree), and the process returns to S23 again, and is repeated until the distance BF satisfies the allowable range A5 at the points around the entire lens. If the distance BF falls within the allowable range A5 at the points around the lens, the right bevel position YR1 and the left bevel position YR1 at that time are stored in the memory 51 as bevel formation data.

  In the process of S29 for inclining the bevel curve, the difference between the inclination amount of the bevel curve on the right lens LER side and the inclination amount of the bevel curve on the left lens LEL side is set to an allowable range A7 (for example, an inclination of 5 degrees). It is good to set a limit. This is because if the difference in the amount of inclination of the bevel curve between the left and right lenses becomes too large, the balance of the positional relationship between the edge of the left and right lenses supported by the rim and the rim deteriorates, and the appearance deteriorates. By limiting the slope of the bevel curve on the left and right, it is possible to suppress a decrease in appearance.

  When the difference in the slope amount of the bevel curve between the left and right lenses reaches the limit of the allowable range A7, the control unit 50 displays a message of “adjustment limit” on the display 500 to indicate that automatic adjustment processing of the bevel position is not possible. Inform the operator.

  When the control unit 50 determines the bevel positions of the right lens LER and the left lens LEL, the control unit 50 calls the determination information of the bevel position of the lens (for example, the left lens LEL) held on the lens holding shaft 102 from the memory 51. The control unit 50 controls driving of the moving unit 300 based on the bevel position information and the target lens shape TD, and causes the peripheral edge of the lens held by the lens holding shaft 102 to be processed by the roughing tool 166 and the finishing tool 164 ( S13). Next, instead of the processed lens of the lens holding shaft 102, the other lens is attached to the lens holding shaft 102. The control unit 50 calls the determination information of the bevel position of the other lens from the memory 51, and then controls the driving of the moving unit 300 based on the bevel position information and the target lens shape TD, and is held by the lens holding shaft 102. The periphery of the lens is processed by the roughing tool 166 and the finishing tool 164 (S14).

  In the above, the case where the bevel is formed on the edge of the lens is taken as an example, but the case where the groove is formed on the edge of the lens can be basically performed by the same process. When the groove is formed on the peripheral edge of the lens, the control unit 50 finishes the peripheral edge of the lens with the finishing tool 164 and then finishes the flat surface, and then, based on the groove formation information, the grooving tool 436 of the second processing tool unit 400. To form grooves on the periphery of the lens.

  Next, bevel position manual adjustment processing in the bevel or groove data setting program in the second machining mode will be described with reference to FIGS. 14 to 15. Hereinafter, the adjustment of the bevel position will be described as an example. With respect to the bevel position adjustment process, the switch 502 can be used to select the automatic adjustment mode or the manual adjustment mode.

  FIG. 14 is an example of a screen displayed on the screen 520 of the display 500 when the manual adjustment mode is selected. On the screen 520, a target lens shape TGR indicating the right target lens shape of the right lens acquired by the target lens acquiring unit and a target lens shape TGL indicating the left target lens shape of the left lens are displayed. A frame graphic FG indicating a spectacle frame is schematically displayed on the upper part of the target lens figures TGR and TGL. The frame figure FG shows a right temple FTR and a left temple FTL.

  In addition, a right cross-sectional shape 524R showing a cross-section of the edge after the beveling at the radial angle specified by the right lens is displayed on the display unit 522R at the top of the screen 520. The right rim cross-sectional shape 526R is simultaneously displayed on the display unit 522R. On the display unit 522L at the top of the screen 520, a left cross-sectional shape 524L indicating the cross-section of the edge after the beveling at the radial angle specified by the left lens is displayed. The left rim cross-sectional shape 526L is simultaneously displayed on the display unit 522L. The right cross-sectional shape 524R is displayed based on the acquisition result of the lens shape of the right lens. The left cross-sectional shape 524L is displayed based on the acquisition result of the left lens lens shape. The rim cross-sectional shapes 526R and 526L are displayed based on the acquisition result of the rim width.

  A cursor 530R is displayed on the right target figure TGR. The cursor 530R is displayed so as to move on the outer diameter of the right target figure TGR by the operator's touch operation. The cursor 530R is used as an example of a designation unit that designates the radius radius angle of the right target lens (a radius radius angle with respect to the geometric center TCR) in order to display the right cross-sectional shape 524R. Similarly, a cursor 530L is displayed on the left target figure TGL. The cursor 530L is displayed so as to move on the outer diameter of the left target figure TGL by an operator's touch operation. The cursor 530L is used as an example of a designation unit that designates the radial radius angle (radial radius angle with respect to the geometric center TCL) of the left target lens in order to display the left sectional shape 524R.

  In addition, the display portion 542R of the screen 520 displays a right side surface shape 546R in a state where the edge of the right lens after beveling is viewed from the side surface. On the display portion 542L of the screen 520, a left side surface shape 546L in a state where the edge of the left lens after beveling is viewed from the side surface is displayed.

  The cursor 530R is used as an example of a designation unit that designates the observation direction of the side surface of the right lens in order to display the right side surface shape 546R. Similarly, the cursor 530L is used as an example of a designation unit that designates the observation direction of the side surface of the left lens in order to display the left side shape 546L.

  The screen 520 is provided with input fields 551R and 551L which are examples of input means for inputting adjustment data for changing the curve values of the right lens and the left lens, respectively. The screen 520 is provided with input fields 553R and 553L which are examples of input means for inputting adjustment data for moving the bevel curve positions of the right lens and the left lens in the front-rear direction. Further, the screen 520 is provided with input fields 555R and 555L which are examples of input means for inputting adjustment data for inclining the bevel curves of the right lens and the left lens.

  Next, an example in which the operator adjusts the bevel positions formed on the left and right lenses by using the screen 520 will be described.

  First, the temporary bevel positions (the bevel positions YR1 and YL1 in FIG. 10) of the right lens and the left lens are set by the control unit 50 or the operator. When the control unit 50 sets a temporary bevel position, it is the same as in the case of the automatic adjustment process described above. For example, the initial value of the bevel curve is common to the left and right lenses, and is a value that matches the frame curve FR acquired in advance. Further, the position of the bevel apex is set so as to pass through a position that is half the edge thickness of the thinnest part based on the lens shape information (lens edge thickness) of the left and right lenses acquired in advance.

  When the operator sets a temporary bevel position, for example, it can be set by inputting the value of the frame curve FR in the input fields 551R and 551L. The position of the bevel apex is set so as to be half the edge thickness of the thinnest part based on the acquired lens shape information of the left and right lenses.

  Next, the operator adjusts the temporarily determined bevel position. When the operator moves the cursor 530R by the touch function of the display 500 and designates an arbitrary radial angle of the right lens, the right cross-sectional shape 524R is set at the designated angle by the control of the display on the display 500 by the control unit 50. The cross-sectional shape of the edge is changed. The bevel position 525R in the right cross-sectional shape 524R is displayed based on the temporary bevel position. Further, the edge positions of the lens front surface and the lens rear surface in the right sectional shape 524R are displayed based on the acquired lens shape of the right lens. Similarly, when the operator designates an arbitrary radius angle of the left lens with the cursor 530L, the left sectional shape 524L is changed to the sectional shape of the edge at the designated angle. The bevel position 525L in the left cross-sectional shape 524L is displayed based on the temporary bevel position, and the edge positions of the lens front surface and the lens rear surface in the left cross-sectional shape 524L are displayed based on the acquired lens shape of the left lens.

  It should be noted that when one of the cursors 530R and 530L is moved, the control unit 50 may control so that the other cursor is automatically moved symmetrically in conjunction with the other cursor. Thereby, the operator can confirm the cross-sectional shapes 524R and 524L of the edge of the left and right lenses easily and comparatively with the same radial radius angle, with little effort.

  The operator can determine an observation point that places importance on the appearance of the positional relationship between the rim and the edge of the lens by specifying the radial angle with the cursors 530R and 530L for the right lens and the left lens. Then, by displaying the cross-sectional shapes 524R and 524 at the observation points that emphasize the appearance, the operator can determine the positional relationship between the lens front surface and the bevel apex position (or the positional relationship between the lens front surface protruding from the rim). Compare with left and right lenses.

  The operator compares these cross-sectional shapes, and the difference between the distance BR from the bevel apex of the right lens to the lens front surface at the observation point and the distance BL from the bevel apex of the left lens to the lens front surface is within the allowable range A1. Adjustment is made to move the bevel position of at least one of the right lens and the left lens so that the allowable range A1 in the manual mode may be determined by observing the cross-sectional figure by the operator. The bevel position can be moved by inputting a value in the input fields 553R and 553L. When the values in the input fields 553R and 553L are changed, the control unit 50 changes the display positions of the bevel positions 525R and 525L. Further, the control unit 50 changes the display positions of the rim cross-sectional shapes 526R and 525L corresponding to the display positions of the bevel positions 525R and 525L. By observing these display positions, the operator can confirm the change in the protrusion distance of the lens front surface from the rim. Therefore, the adjustment for moving the bevel position can be determined while looking at the protrusion distance of the front surface of the lens from the rim with the left and right lenses. The left and right bevel positions may be adjusted so that the difference in the protrusion distance between the left and right lenses falls within the allowable range A2 (for example, 0.2 mm).

  Further, the operator moves the left and right bevel positions together by inputting in the input fields 553R and 553L so that the distance BR and the distance BL are within the allowable range determined by the operator (for example, the above-described allowable range A3). Adjustments can be made. The values in the input fields 553R and 553L are the distances of the bevel position from the front surface of the lens at the radius angle specified by the cursors 530R and 530L.

  As described above, when the operator moves the cursors 530R and 530L, the display of the cross-sectional shapes 524R and 524L and the like is changed to the cross-sectional shape at the designated radial angle. For this reason, the operator can confirm the distance BR and the distance BL in the entire circumference of the left and right lenses, and can confirm the protrusion distance of the lens front surface from the rim in the entire circumference of the left and right lenses. The operator confirms whether the distance BF between the lens front surface and the bevel position on the entire circumference of the left and right lenses is within the allowable range, or whether the protrusion distance of the lens front surface from the rim is within the allowable range. Check.

  When the distance BF or the protrusion distance is out of the allowable range, a method of changing the curve value of the bevel curve can be used as the bevel position adjustment method. When the operator determines that the distance BF or the protrusion distance is outside the allowable range, the curve value of the bevel curve is changed by changing the values in the input fields 551R and 551L. When the values in the input fields 551R and 551L are changed, the control unit 50 recalculates the bevel position, and changes the display state of the bevel positions 525R and 525L in the cross-sectional shapes 524R and 524L. Thereby, the operator can confirm again the observation point which attaches importance to appearance, and the cross-sectional shape in the perimeter. For example, by changing the bevel curve of the right lens, if the observation point that emphasizes the appearance of the left and right lenses and the bevel position or protrusion distance on the entire circumference are within the allowable range, then the bevel on the left and right lenses at this time The position is determined as bevel formation data.

  Further, if the bevel position or the protrusion distance at the observation point and the entire circumference does not fall within the allowable range even if the bevel curve is changed, it is possible to take measures to incline the bevel curve by inputting the input fields 555R and 555L ( (See FIG. 13 for an example of the inclination of the bevel curve (bevel position)). Alternatively, instead of changing the bevel curve, an allowable range of the bevel position or the protrusion distance may be satisfied by inclining the bevel curve. For example, for the right lens, the reference position (radial angle) of the bevel curve inclination can be set by a mark 533R on the right target figure TGR, and for the left lens, the bevel curve inclination can be set by the mark 533L on the target figure TGL. A reference position (radial angle) can be set. The marks 533R and 553L can be moved to arbitrary positions on the target lens by the touch function of the display 500.

  Here, if the bevel curve value is changed to a value different from the frame curve FR, or if the bevel curve is adjusted to be inclined, the rim is beveled when the beveled lens is supported by the rim of the frame. It deforms along the formation position. Due to the deformation of the rim, the opening angles of the left and right temples of the frame also change. For example, if the change in the opening angle of the temple is 0.5 degrees or less, the correction of the opening angle of the temple is small, but if there is an opening of 2 degrees or more, the correction may be difficult. Therefore, in the apparatus of the embodiment, in order for the operator to check the change in the opening angle of the temple, the change of the curve value of the bevel curve or the adjustment data of the slope of the gen curve is input to the input fields (551R and 551L, 555R and 555L). Then, based on the adjustment data, display means for displaying a change in the opening angle on the temple is provided. For example, the opening angle of the right temple is displayed in the display field 562R next to the right temple FTR shown in the screen 520. In addition, the opening angle of the left temple is displayed in the display field 562L next to the left temple FTL. As for the opening angle of the temple, the control unit 50 obtains the tangent direction at the ear end of the frame curve FR, obtains the tangent direction at the ear end of the changed bevel curve, and determines the difference in angle between the two tangent directions. Mathematically based on the basis. The operator can check the degree of opening angle of the left and right temples by using the display fields 562R and 562L, and determine whether or not to change the curve value of the bevel curve or adjust the inclination of the bevel curve.

  In the above, an example has been described in which the operator confirms whether or not the right and left bevel positions are adjusted by using the cross-sectional shapes 524R and 524L of the display portions 522R and 552R. The display of 546L may be used for confirmation. If the side shapes 546R and 546L are used, the positional relationship between the left and right bevel positions 543R and 543L and the edge of the left and right lenses (lens front surface) can be confirmed over a wide range.

  15 is an example in which the shape of the rim is added to the display of the side surface shapes 546R and 546L in FIG. 14, and instead of the display portions 542R and 542L in FIG. 14, display portions 562R and 562L to which the shape of the rim is added are provided. Is displayed. The display portion 562R displays a rim side surface shape 565R superimposed on the right lens edge right side shape 546R, and the display portion 562L displays the left lens edge left edge shape 546L superimposed on the side surface of the rim. A shape 565L is displayed. The side surface shapes 565R and 656L of the rim are displayed at positions corresponding to the bevel position 543R of the right lens and the bevel position 543L of the left lens, respectively. In this case, the operator can confirm whether or not the adjustment of the bevel position is appropriate based on the distance that the front surface of the lens protrudes from the rim. Thereby, the operator can confirm the positional relationship between the bevel formation position and the lens front surface (edge) protruding from the rim more accurately, and can easily adjust the bevel position where the appearance is good.

  In the above-described manual adjustment mode, the case where the bevel is formed has been described as an example. However, when the groove is formed on the edge of the lens, basically the same display mode can be used. Therefore, description of the example of the formation position of a groove | channel is abbreviate | omitted.

  As described above, in the manual adjustment mode, the operator adjusts the bevel formation position or the groove formation position of the left and right lenses, so that the left and right lenses look good when they are supported by the rim even when the right and left lenses have greatly different edge thicknesses. A bevel or a groove that provides a good value can be processed.

DESCRIPTION OF SYMBOLS 1 Eyeglass lens processing apparatus 1A Bevel or groove formation data setting apparatus 50 Control unit 51 Memory 100 Lens holding unit 150 1st processing tool unit 164 Processing tool 200 Lens shape measurement unit 300 Moving unit 400 2nd processing tool unit 436 Groove addition Tool 500 Display 520 screen

Claims (5)

A bevel or groove formation data setting device for setting data for forming a bevel or groove for supporting a spectacle lens on the rim of the spectacle frame on the edge of the lens,
Lens shape acquisition means for obtaining the lens shape of the front surface of each of the left and right lenses;
Based on the acquired lens shape of the right lens, a temporary first formation position of a bevel or groove to be formed on the edge of the right lens is set, and on the edge of the left lens based on the acquired lens shape of the left lens. Forming position setting means for setting a temporary second forming position of the bevel or groove to be formed;
Adjusting means for adjusting at least one of the first forming position and the second forming position in the edge thickness direction of the lens, the lens front surface of the right lens at at least one position of the radial angle of the lens lens Adjusting the balance regarding the difference between the first distance of the first formation position relative to the lens and the second distance of the second formation position relative to the lens front surface of the left lens , or the first protrusion distance of the right lens front surface from the rim Adjusting means for adjusting a balance relating to a difference between the second protrusion distance of the left lens front surface from the rim , and
A bevel or groove formation data setting device comprising: 2. The bevel or groove formation data setting device according to claim 1, wherein the adjustment means includes at least the first formation position and the second formation position so that a difference between the first distance and the second distance is small. Adjust one or adjust at least one of the first formation position and the second formation position so that the difference between the first protrusion distance and the second protrusion distance is reduced. A bevel or groove formation data setting device characterized by being configured. The bevel or groove formation data setting device according to claim 1 or 2, wherein the adjustment means adjusts so that a difference between the first distance and the second distance falls within a set allowable range, or The bevel or groove formation data setting device, wherein the difference between the first protrusion distance and the second protrusion distance is adjusted to fall within a set allowable range. In the bevel or groove formation data setting device according to claim 1, the adjustment means includes:
Display means for displaying the edge cross-sectional shape of each of the left and right lenses after processing of the bevel or the groove or the edge side shape of the edge viewed from the side;
Designating means for designating the radius angle of the lens for displaying the edge cross-sectional shape, or designating the observation direction for displaying the side surface shape;
Adjustment data input means for inputting adjustment data relating to the adjustment positions of the first formation position and the second formation position;
Display control means for displaying the edge cross-sectional shape of the radial angle specified by the specifying means or the edge side shape of the specified observation direction so as to be comparable with the left and right lenses,
The display control means changes the display state of the edge cross-sectional shape or the edge side shape of the left and right lenses based on the adjustment data input by the adjustment data input means, and the bevel or groove formation data setting is characterized in that apparatus. A bevel or groove formation data setting program executed by a bevel or groove formation data setting device for creating bevel or groove formation data for supporting the spectacle lens on the rim of the spectacle frame,
By being executed by the processor of the bevel or groove formation data setting device,
A lens shape acquisition step of obtaining the lens shape of the front surface of each of the left and right lenses;
Based on the acquired lens shape of the right lens, a temporary first formation position of a bevel or groove to be formed on the edge of the right lens is set, and on the edge of the left lens based on the acquired lens shape of the left lens. Forming position setting step for setting a temporary second forming position of the bevel or groove to be formed;
An adjustment step for adjusting at least one of the first formation position and the second formation position in the edge thickness direction of the lens, the lens front surface of the right lens at at least one position of the radial angle of the lens lens Adjusting the balance regarding the difference between the first distance of the first formation position relative to the lens and the second distance of the second formation position relative to the lens front surface of the left lens , or the first protrusion distance of the right lens front surface from the rim A forming data setting program that causes the forming data setting device to execute an adjustment step of adjusting a balance relating to a difference between the second protrusion distance of the left front surface of the left lens from the rim .

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