JP6379744B2 - Eyeglass lens processing apparatus and eyeglass lens processing program - Google Patents

Description

  The present invention relates to an eyeglass lens processing apparatus and an eyeglass lens processing program for processing an edge of an eyeglass lens.

  The spectacle frame is diversified, and the spectacle lens is also required to be variously processed. For example, there is a high-curve frame that is mainly used for sunglasses and has a strong frame curve (high degree of curvature). In some cases, a lens with a degree (a lens having a refractive power and a thick edge) is put in the high curve frame instead of the sunglasses lens. In this case, after finishing the periphery of the lens (for example, after bevel finishing or after flat finishing), for example, step processing is performed to form a step portion on the rear surface side of the lens periphery (Patent Document 1). reference). As a processing tool used for step processing, for example, a cylindrical tool is used (see Patent Document 2).

JP 2009-131939 A See Japanese Patent Application Laid-Open No. 2014-50891, FIG.

  FIG. 19 shows an example of a step processing tool TSt having a cylindrical processing surface TSa used in Patent Document 2 (Japanese Patent Application Laid-Open No. 2014-50891). In the step processing using the step processing tool TSSt, a stepped portion STT is formed so as to leave a protruding portion (convex portion) LSt protruding in the radial direction of the lens, and the lens is formed from the wall surface Sta of the stepped portion STT and the wall surface Sta. An angle SA formed by the base surface Stb extending to the rear surface side is 90 degrees.

  However, in the conventional step processing using the step processing tool having the cylindrical processing surface TSa, the angle formed by the wall surface Sta and the base surface Stb is constant, and the processing of the stepped portion or the shape of the protruding portion is fixed. Yes, the degree of freedom of step processing has decreased.

  An object of the present invention is to provide a spectacle lens processing apparatus and a spectacle lens processing program capable of increasing the degree of freedom of step processing.

In order to solve the above problems, the present disclosure is characterized by having the following configuration.
(1) A spectacle lens processing apparatus provided by a typical embodiment of the present disclosure is a processing tool that forms a step portion on a lens holding shaft and a peripheral edge of a spectacle lens that has been processed into a target lens shape, and the step portion And a processing tool for forming a bottom surface extending from the wall surface to the lens surface side, a processing tool rotating shaft to which the processing tool is attached, and a relative positional relationship between the spectacle lens and the processing tool. a position adjusting means for adjusting the on position adjusting means and the lens front surface of the curve information and lens periphery having an axis angle changing means for changing the relative axial angle between the processing tool rotating shaft and the lens-holding shaft and control and data acquisition means for acquiring a stepped formation data for forming the step portion, the position adjusting means based on the obtained level difference formation data, first to form the wall surface by the processing tool Control means for separately performing one process and a second process for forming the skirt surface by the processing tool, and the control means includes the control unit at each radial angle of the target lens in the first process. An inclination angle of the wall surface with respect to the lens holding axis is set based on the curve information of the front surface of the lens, and the wall angle is formed by controlling the axis angle changing means based on the set inclination angle. The shaft angle changing means is controlled to control the shaft angle changing means so that an angle formed by the holding shaft and the base surface at each radial angle of the mold becomes a predetermined angle set irrespective of the inclination angle of the wall surface. A surface is formed.
(2) A spectacle lens processing program provided by a typical embodiment of the present disclosure includes a processing tool that forms a step portion on the periphery of a spectacle lens that is held by a lens holding shaft and finished into a target lens shape, and a spectacle lens Position adjusting means for adjusting a relative positional relationship between the lens holding shaft and the processing tool rotation axis, and a position adjusting means for changing a relative axial angle between the lens holding shaft and the processing tool rotating shaft. When, a spectacle lens processing program executed in the control device for controlling the operation of the eyeglass lens processing apparatus comprising, from the walls and the wall surface of the stepped portion machined lens periphery finishing the target lens shape on the lens surface side extending so as to form a foot surface, and controls the position adjusting means based on the obtained lens front surface curve information and the step formation data by the data acquisition means, the processing A control step of separately performing a first process for forming the wall surface by a tool and a second process for forming the bottom surface, wherein the first process is performed with respect to the lens holding shaft at each radial angle of the target lens shape. The inclination angle of the wall surface is set based on the curve information on the front surface of the lens, and the wall surface is formed by controlling the shaft angle changing means based on the set inclination angle. The shaft angle changing means is controlled to form the skirt surface so that an angle formed by the holding shaft and the skirt surface at a radial angle becomes a predetermined angle set regardless of the inclination angle of the wall surface. The control device is caused to execute a control step.

  According to the exemplary embodiment of the present disclosure, the degree of freedom of step processing can be increased.

It is a schematic block diagram of the spectacle lens processing apparatus of an Example. It is a schematic block diagram of a lens chuck unit. It is a figure which shows the example of the finishing tool with a beveling tool. It is a figure which shows the example of a step processing tool. It is a schematic block diagram of the X-axis moving mechanism and Z-axis moving mechanism of a position adjustment unit. It is a schematic block diagram of the Y-axis moving mechanism of a position adjustment unit. It is a schematic block diagram of the electrical system in the apparatus of an Example. It is a figure which shows the example of the demonstration lens with which the lens exchange type spectacles frame and the spectacles frame were equipped. It is a figure which shows the example of the protrusion part and level | step-difference part which remain | survive after step processing in order to fit in the groove of a frame. It is an operation | movement flowchart relevant to step processing. It is a figure which shows the example which acquires a target lens shape and cutting trajectory data based on a demo lens. It is a figure explaining the relationship between the processing tool rotation axis | shaft and lens chuck | zipper axis | shaft in the flat finishing process of the periphery of a lens. It is a figure explaining the step process which forms a level | step-difference part in the lens rear surface side. It is a figure explaining the 1st processing and the 2nd processing in the case of forming a level difference part on the lens back surface side. It is a figure which shows the example of a setting screen of the level | step difference formation data displayed on a display. It is a figure which shows the example which forms a level | step-difference part so that a protrusion part may taper off. It is a figure which shows the example which formed the level | step-difference part in the front side of the lens. It is a figure explaining the 1st processing and the 2nd processing in case a level difference part is formed in the lens front side. It is a figure which shows the formation state of the step part of a prior art example, and the level | step-difference part after tapping.

<Overview>
One exemplary embodiment will be described with reference to FIGS. 1 to 18 are diagrams for explaining an eyeglass lens processing apparatus and an eyeglass lens processing program according to the embodiment.

  The spectacle lens processing apparatus 1 according to the embodiment mainly includes a lens holding shaft, a step processing tool, a position adjustment unit, a data acquisition unit, and a control unit. As the lens holding shaft, for example, a pair of lens chuck shafts (shafts) 222F and 222R that hold a spectacle lens (hereinafter abbreviated as a lens) LE are used. The lens holding shaft is used for holding and rotating the lens LE.

  For the step processing tool 340, for example, a cutter or a grindstone is used. The step processing tool 340 is used to form a stepped portion STT (STTf) on the periphery of the lens LE finished into a target lens shape. In other words, the step processing tool 340 leaves a protruding portion LSt protruding in the radial direction of the peripheral edge of the spectacle lens finished into a target lens shape, and a step portion (STT, STTf) on at least one of the front side and the rear side of the lens LE. Is used to form The step portion STT formed on the lens rear surface side includes, for example, a wall surface Sta on the lens rear surface side and a skirt surface Stb extending from the wall surface Sta to the lens rear surface side. The stepped portion STTf formed on the lens front side includes, for example, a wall surface Staf on the lens front side and a skirt surface Stbf extending from the wall surface Staf to the lens front side.

  Further, the step processing tool 340 has, for example, a tapered processing surface (a state in which the diameter gradually decreases in a conical shape). The taper-shaped processing surface may be any surface that is tapered when the step processing tool 340 is rotated around the central axis of the processing tool rotation axis. The shape of the step processing tool 340 of this embodiment is a shape in which the tip portion of the cone is removed.

  The position adjusting unit 110 is used to adjust the relative positional relationship between the lens LE and the step processing tool 340. For example, a moving means 125 for moving the lens holding shaft with respect to the processing tool rotation shaft 312f of the step processing tool 340 is provided. As another example, a moving means 125 for moving a processing tool rotating shaft 312f of the step processing tool with respect to the lens holding shaft is provided. The moving means 125 changes the distance between the lens holding shaft and the processing tool rotation shaft 312f, for example. The moving means 125 can move the processing tool rotating shaft 312f relatively in the axial direction of the lens holding shaft, for example, and relatively moves the three-dimensional position between the lens LE and the step processing tool 340. Can be changed.

  Further, the position adjusting unit 110 includes, for example, an axis angle changing unit that changes a relative axis angle between the lens holding shaft and the processing tool rotation shaft 312f. The shaft angle changing means can change the angle formed between the lens holding shaft and the processing tool rotation shaft 312f, for example.

  The control means performs drive control of the machining configuration unit of the apparatus 1 and control of the entire apparatus, and also controls the shaft angle changing means and the position adjusting means. The control unit also serves as a data acquisition unit that acquires step formation data for forming a step portion on the lens periphery, for example. The control means also serves as curve information acquisition means for acquiring curve information on the front surface of the lens.

  The control means controls the position adjustment means based on the step formation data acquired by the data acquisition means, and forms the wall surface Sta (Staf) by the step processing tool 340 and the skirt surface Stb by the step processing tool 340. The second processing for forming (Stbf) is performed separately. In addition, the control means is configured so that the angle between the first machining and the second machining is such that the angle SA formed by the wall surface Sta (Staf) and the bottom surface Stb (Stbf) changes at least at a radial radius of the target lens shape. The angle changing means is controlled separately. Either the first processing or the second processing may be performed first.

  Further, the control means controls the shaft angle changing means to form the wall surface Sta (Staf) based on the wall surface formation data included in the step formation data in the first processing, and forms the bottom surface Stb (Stbf) in the second processing. The skirt surface is formed by controlling the shaft angle changing means so that the angle formed with the lens holding shaft becomes the desired angle.

  In addition, the apparatus 1 includes setting means configured to arbitrarily set the angle of the wall surface Sta (Staf) with respect to the lens front surface with at least a part of the radius vector of the target lens shape. And a control means controls a shaft angle change means based on the setting information by a setting means, and forms wall surface Sta (Staf). As the setting means, for example, the display 20 is used. The operator can arbitrarily set the angle of the wall surface Sta (Staf) on the screen of the display 20.

  The device 1 also includes curve information means for acquiring curve information on the front surface of the lens. And a control means sets the inclination-angle of the wall surface with respect to the lens holding shaft in each radial angle angle of a lens shape based on the inclination of the lens front curve with respect to the lens holding shaft in the peripheral position of the lens front surface corresponding to a lens shape.

  Further, the embodiment includes a spectacle lens processing program that is executed by a control device that controls the operation of the spectacle lens processing apparatus that performs peripheral processing of the spectacle lens. For example, the machining program may be stored in a storage device in the control unit of the apparatus 1. Further, the machining program may be executed by a processor (for example, CPU) in the control unit. The control device may be a device different from the device 1 (for example, a personal computer).

  The processing program uses, for example, a processing tool 340 for forming a stepped portion STT (STTf) on the lens periphery, and a lens surface finished with a lens shape, the wall surface Sta (Staf) and the wall surface Sta (Staf) on the lens periphery. ) To adjust the relative positional relationship between the spectacle lens and the processing tool 340 based on the step formation data acquired by the data acquisition means so as to form the base surface Stb (Stbf) extending from the lens surface to the lens surface side. A control step for controlling the adjusting means is provided. The control step includes, for example, a first processing control step for forming the wall surface Sta (Staf) by the step processing tool 340 and a second processing control step for forming the skirt surface Stb (Stbf) by the step processing tool 340. .

  According to the exemplary embodiment of the present disclosure, the degree of freedom of step processing can be increased.

  Further, in the conventional example shown in FIG. 19, for example, when a lens in which a stepped portion STT is formed by step processing is put in a frame, the lens is moved in the front direction Fa (the front direction of the lens is usually a lens shape). The geometrical center OC of the processed lens may point to the appearance of the edge surface (lens peripheral surface) of the lens when viewed from the lens perpendicular to the front surface of the lens. In the example of FIG. 19, the base surface Stb when the lens is viewed from the front direction Fa is observed to have a width Std. When the width Std looks large, the appearance is impaired.

In contrast to this conventional example, according to a typical embodiment of the present disclosure, the appearance of a lens after step processing can be improved.
<Example>
In the following, one exemplary embodiment will be described with reference to the drawings. FIG. 1 is a schematic configuration diagram of an eyeglass lens processing apparatus 1 (hereinafter abbreviated as a processing apparatus 1) according to an embodiment, and is a view when the processing apparatus 1 is viewed from the front.

  A lens processing unit 100 is provided in the upper part of the processing apparatus 1. The lens processing unit 100 includes a lens chuck unit (lens rotation unit) 200 configured to hold and rotate the lens LE, a spindle holding unit (processing tool rotation unit) 300 for rotating the processing tool, A position adjustment unit 110 and a lens shape measurement unit 500 are provided. In the embodiment, the vertical direction when the processing apparatus 1 is viewed from the front will be described as the Y-axis direction, the front-rear direction as the X-axis direction, and the left-right direction as the Z-axis direction.

<Lens chuck unit>
FIG. 2 is a schematic configuration diagram of the lens chuck unit 200. The lens chuck unit 200 includes a pair of lens chuck shafts (shafts) 222F and 222R, which are examples of lens holding shafts, and a carriage 221 for sandwiching (holding) and rotating the lens LE. The lens chuck shaft 222F and the lens chuck shaft 222R are arranged in a coaxial relationship. The carriage 221 includes a holding arm 229F that rotatably holds the lens chuck shaft 222F and a holding arm 229R that rotatably holds the lens chuck shaft 222R. The holding arm 229F is fixed to the front side of the carriage 221. The holding arm 229R is held by the carriage 221 so as to be movable in the axial direction in which the lens chuck shaft 222R extends. For example, the carriage 221 is provided with a rail (not shown) extending in parallel with the lens chuck shafts 222R and 222F, and is movably provided along the rail to the holding arm 229R. A drive source 230 (see FIG. 7) for moving the holding arm 229R is disposed on the carriage 221. The drive source 230 is composed of, for example, an air cylinder or a motor. The lens chuck shaft 222R is moved to the lens chuck shaft 222F side by driving the drive source 230, whereby the lens LE is held (held) by the lens chuck shaft 222F and the lens chuck shaft 222R.

  The carriage 221 is provided with a motor 220R, which is an example of a drive source for rotating the lens chuck shaft 222R, and a motor 220F, which is an example of a drive source for rotating the lens chuck shaft 222F. . The motors 220R and 220F are provided on the back side of the carriage 221, for example. By driving the motor 220R, for example, the lens chuck shaft 222R is rotated via a rotation mechanism such as a timing belt and a pulley. By driving the motor 220F, for example, the lens chuck shaft 222F is rotated through a rotation mechanism such as a timing belt and a pulley. When the motors 220R and 220F are driven in synchronization, the lens chuck shafts 222R and 222F are rotated in synchronization. The lens chuck shafts 222R and 222F may be rotated synchronously by a single drive source.

<Spindle holding unit>
In FIG. 1, the spindle holding unit 300 includes a plurality of processing tools for processing the periphery of the lens LE and the like. In the present embodiment, the moving support base 302L arranged on the left side of FIG. 1 is provided with spindles 310a, 310b and 310c which are examples of processing tool rotating units (processing tool rotating means). 1 is provided with spindles 310d, 310e and 310f which are examples of processing tool rotating units (processing tool rotating means). In this embodiment, each spindle is arranged such that the tip of the spindle is inclined downward (in the direction of gravity). The inclination angle degree of each spindle is, for example, arranged to be inclined 45 ° downward from the Z-axis direction (horizontal direction). Thereby, when arrange | positioning a some spindle, an apparatus can be reduced in size.

  A roughing tool 320a for roughing the peripheral edge of the unprocessed lens LE is attached to a processing tool rotating shaft (rotating shaft) 312a of the spindle 310a. As the rough processing tool 320a, for example, an end mill, a cutter, a rough grindstone, or the like is used.

  A groove processing tool 320b for grooving the periphery of the lens LE is attached to the processing tool rotation shaft (rotary shaft) 312b of the spindle 310b. As the groove processing tool 320b, for example, a cutter, a grindstone, or the like is used.

  A hole processing tool 320c for drilling a hole in the refracting surface of the lens LE is attached to the processing tool rotation shaft (rotary shaft) 312c of the spindle 310c. For example, an end mill or the like is used as the hole processing tool 320c.

  A finishing tool 330 for finishing the peripheral edge of the roughly processed lens LE is attached to the processing tool rotating shaft 312e of the spindle 310e. As the finishing tool 330, for example, a cutter or a grindstone is used. FIG. 3 is a diagram illustrating an example of a finishing tool 330 having a beveling tool. The right side of FIG. 3 shows a side view of the finishing tool 330, and the left side of FIG. 3 shows a cross-sectional view of A3-A3 in the side view.

  The finishing tool 330 includes a beveling tool 332 having a V-groove 331 for forming a bevel at the periphery of the lens, and a flat finishing tool 334 for flat finishing the periphery of the lens. In the embodiment, the V-groove 331 is used for beveling of a low curve lens (lens having 5 curves or less). The depth distance of the V groove 331 with respect to the flat processed surface is smaller than the thickness of the lens LE (for example, 0.9 mm).

  In the embodiment, the beveling tool 332 and the flat finishing tool 334 are coaxially attached to one processing tool rotating shaft 312e. Further, the flat finishing tool 334 can also serve as a chamfering tool for chamfering the front refractive surface and the rear refractive surface of the lens. FIG. 3 shows an example of a cutter as the finishing tool 330. In the example of FIG. 3, cutter blades 335 are provided at two locations at intervals of 180 degrees on the circumference. However, one or more cutter blades 335 are sufficient.

  In the embodiment, the outer diameter of the finishing tool 330 with respect to the axial center 312eC of the processing tool rotating shaft 312e is formed such that the distance from the central axis 312eC gradually decreases toward the tip of the processing tool. Yes. Thereby, even when the curve of the refractive surface of the lens LE is tight, it is possible to prevent the bevel from becoming small.

  A step processing tool 340 for performing step processing (processing for forming a step portion) is attached to the periphery of the lens LE that has been finished (flat finishing or bevel finishing) on the processing tool rotating shaft 312f of the spindle 310f. It has been. FIG. 4 is a diagram illustrating an example of the step processing tool 340. The step processing tool 340 is composed of, for example, a cutter, a grindstone, or the like. The embodiment is an example of a cutter. In the example of FIG. 4, the blades of the cutter that constitute the processing surface 345 for performing step processing on the periphery of the lens are provided at four locations at intervals of 90 degrees. However, one or more cutter blades are sufficient. The step processing tool 340 has a processing surface 345 that is tapered (a state in which the diameter gradually decreases in a conical shape) by being rotated about the central axis (AXIS) 312fc of the processing tool rotation shaft 312f. For example, the processing surface 345 is formed so that an angle PA formed by a surface orthogonal to the central axis 312fc and the processing surface 345 is an acute angle. In other words, the processing surface 345 is formed such that the distance from the central axis 312 fc decreases as it goes to the tip of the processing tool 340. The shape of the step tool 340 of the embodiment is a shape in which the tip portion of the cone is removed.

  The angle PA is configured to be equal to or smaller than the angle SA formed by the wall surface STa and the bottom surface STb of the stepped portion STT formed on the periphery of the lens LE by step processing described later (see FIG. 13). For example, the angle PA is configured to be 60 degrees or less.

  A mirror surface processing tool 320d for performing mirror surface processing is attached to the periphery of the finished lens LE on the processing tool rotating shaft 312d of the spindle 310d. The mirror surface processing tool 320d is, for example, a grindstone. Similar to the finishing tool 330, the mirror finishing tool 320d includes a mirror surface beveling tool having a V groove 331 and a mirror surface flat finishing tool.

  The arrangement positions of the processing tools (320a to 320d, 330, and 340) in FIG. 1 are merely examples, and may be switched. A plurality of processing tools may be arranged on one processing tool rotating shaft. For example, the groove processing tool 320b and the hole processing tool 320c can be attached to one processing tool rotating shaft. In the processing apparatus 1 of the embodiment of FIG. 1, each processing tool is attached to the processing tool rotation shaft 312a-312f, but each processing tool is replaced with one processing tool rotation shaft. (Tool change) device may be used.

<Position adjustment unit>
The configuration of the position adjustment unit 110 will be described with reference to FIGS. 2, 5, and 6. The position adjustment unit 110 is provided to adjust the relative positional relationship between each processing tool (320a-320d, 330, 340) and the lens LE held by the lens chuck shafts 222F, 222R. The position adjustment unit 110 includes an angle adjustment mechanism 120 and a movement mechanism 125. The angle adjustment mechanism 120 is used to adjust (change) the relative angle between the processing tool rotation shaft 312a-312f and the lens holding shaft (lens chuck shafts 222F, 222R). The moving mechanism 125 is used to change the relative distance between the processing tool (320a-320d, 330, 340) and the lens LE held by the lens chuck shafts 222F, 222R. The moving mechanism 125 according to the embodiment includes an X-axis moving mechanism 130, a Z-axis moving mechanism 140, and a Y-axis moving mechanism 150.

  FIG. 2 shows a schematic configuration of the angle adjustment mechanism 120. In FIG. 2, the carriage 221 is held by a carriage base 112 (see FIGS. 1 and 5) so as to be rotatable about an A axis that passes through the center of the carriage 221 and extends parallel to the X-axis direction (front-rear direction). Has been. A pulley 127 is attached to the outer periphery of the carriage 221. The angle adjustment mechanism 120 includes a motor 126 for rotating the carriage 221 around the A axis. The motor 126 is attached to the carriage base 112. The rotation of the motor 126 is transmitted to the carriage 221 via a timing belt 128 and a pulley 127 which are examples of a rotation transmission mechanism. Thereby, the lens chuck shafts 222F and 222R are rotated around the axis of the A axis, and the relative angles of the lens chuck shafts 222F and 222R with respect to the processing tool rotation shafts 312a to 312f are adjusted (changed).

  FIG. 5 is a schematic configuration diagram of the X-axis moving mechanism 130 and the Z-axis moving mechanism 140. The X-axis moving mechanism 130 is used to adjust (move) the position of the lens chuck shafts 222F and 222R relative to the processing tool rotation shafts 312a to 312f in the X-axis direction. In FIG. 5, the carriage base 112 is held by a Z-axis movement base 131 so as to be movable in the X-axis direction. A motor 135 is disposed on the Z-axis movement base 131. The rotation of the motor 135 is converted into a linear motion in the X-axis direction by, for example, a conversion mechanism 136 (consisting of known members such as a ball screw and a nut) for converting the rotational motion into a linear motion. The carriage base 112 is moved in the X-axis direction via the conversion mechanism 136 by the rotation of the motor 135. Thereby, the relative position in the X-axis direction of the lens LE held by the lens chuck shafts 222F and 222R with respect to each processing tool is adjusted (moved).

  The Z-axis moving mechanism 140 is used to adjust (move) the position of the lens chuck shafts 222F and 222R relative to the processing tool rotation shafts 312a to 312f in the Z-axis direction. In FIG. 5, the Z-axis movement base 131 is mounted on the main body base portion 10 of the processing apparatus 1 so as to be movable in the Z-axis direction. A motor 145 is disposed on the base 10. The rotation of the motor 145 is converted into a linear motion in the Z-axis direction by a conversion mechanism 146 (consisting of known members such as a ball screw and a nut) for converting the rotational motion into a linear motion. As the motor 145 rotates, the Z-axis movement base 131 is moved in the Z-axis direction via the conversion mechanism 146. Thereby, the relative position in the Z-axis direction of the lens LE held by the lens chuck shafts 222F and 222R with respect to each processing tool is adjusted (moved).

  FIG. 6 is a schematic configuration diagram of the Y-axis moving mechanism 150. FIG. 6 is a view of the spindle holding unit 300 as viewed from the back side of the processing apparatus 1. The Y-axis moving mechanism 150 is used for adjusting (moving) the position of the lens chuck shafts 222F and 222R relative to the processing tool rotation shafts 312a to 312f in the Y-axis direction. The Y-axis moving mechanism 150 of the embodiment is configured to move the spindle holding unit 300 having the processing tool rotation shafts 312a-312f with respect to the base 10 of the processing apparatus 1 in the Y-axis direction.

  In FIG. 6, the movement support bases 302L and 302R are held by the main body base portion 10 so as to be integrally movable in the Y-axis direction. The Y-axis moving mechanism 150 includes a motor 155 disposed on the base 10. The rotation of the motor 155 is converted into a linear motion in the Y-axis direction by a conversion mechanism 156 for converting the rotational motion into a linear motion. Due to the rotation of the motor 155, the movement support bases 302L and 302R are integrally moved in the Y-axis direction via the conversion mechanism 156. Thereby, the assumed position in the Y-axis direction held by the lens chuck shafts 222F and 222R for each processing tool is adjusted.

<Lens shape measurement unit>
In FIG. 1, a lens shape measurement unit (hereinafter abbreviated as a measurement unit) 500 is disposed above the carriage 221. The measurement unit 500 is provided so as to be movable in the Y-axis direction together with the movement support bases 302L and 302R.

  The measurement unit 500 includes a measuring element 511F that is brought into contact with the front refractive surface of the lens LE, and a measuring element 511R that is brought into contact with the rear refractive surface of the lens LE. In addition, the measurement unit 500 includes a drive unit 516 that individually moves the support unit 514F of the probe 511F and the support unit 514R of the probe 511R in the Z-axis direction. In addition, the measurement unit 500 includes a detector (for example, a sensor) 520F that detects the movement position of the measuring element 511F in the Z-axis direction and a detector (for example, a sensor) that detects the movement position of the measurement element 511R in the Z-axis direction. 520R (see FIG. 7).

  When measuring the front refracting surface and the rear refracting surface of the lens LE, the angle adjusting mechanism 120 positions the lens chuck shafts 222F and 222R in parallel with the Z-axis direction, and the Z-axis moving mechanism 140 sets the position in the Z-axis direction to a predetermined value. It is adjusted to the measurement position. Then, the lens LE is rotated by the lens chuck unit 200, and the Y-axis position of the lens LE is changed by the Y-axis moving mechanism 150 based on the target lens shape, and the measurement unit 500 in the axial direction of the lens chuck shafts 222F and 222R. The positions of the front refractive surface and the rear refractive surface of the lens LE are measured.

<Schematic configuration of electrical system>
FIG. 7 is a schematic configuration block diagram of an electric system in the apparatus of the embodiment. The control unit 50 controls each drive mechanism in the processing apparatus 1 and acquires data. The control unit 50 includes motors (230, 220F, 220R) of the lens chuck unit 200, motors (126, 135, 145, 155) of the position adjustment unit 110, a driving unit 516 of the lens shape measuring unit 500, a detector. 520F and 520R are connected. The control unit 50 is connected to a display (input unit) 20 having a touch panel function, a memory 51, and a host computer 1000. The display 20 has a switch for inputting a command signal to the processing apparatus 1.

  From the host computer 1000 which is an example of the external input device, the lens shape data (including data on the radial angle and the radial length), the layout data of the optical center of the lens LE with respect to the lens shape, and a step on the rear surface side of the periphery of the lens LE Processing condition data such as step formation data (protrusion portion formation data) for processing is input. These processing condition data are received by the apparatus 1 and acquired by the control unit 50. The control unit 50 functions as a control device that controls the position adjustment unit 110 and the like to process the periphery of the lens LE. The control unit 50 functions as an example of a data acquisition unit that acquires various data such as step formation data. The control unit 50 functions as an example of a unit that acquires curve data of the refractive surface of the lens LE.

  Next, the operation of the apparatus having the above configuration will be described. In the following description, instead of a demo lens (for example, a high-curve sunglasses lens) provided in a lens interchangeable spectacle frame SF (for example, a high-curve frame), a lens with a degree (a lens having refractive power) is used as the spectacle frame SF. In order to attach to the lens LE, the case where flat finishing and step processing are performed on the periphery of the lens LE will be mainly described. The step processing is performed so as to form step portions (STT, STTf) on at least one of the front side and the rear side of the periphery of the lens LE. In the following, a description will be mainly given of the case where step processing is performed on the rear surface side of the periphery of the lens LE.

  FIG. 8 is a diagram illustrating an example of a lens exchange type spectacle frame SF and a demo lens SL provided in the spectacle frame SF. A concave groove (recessed groove) G indicated by a dotted line is formed on the rim of the spectacle frame SF. The demo lens SL provided in the spectacle frame SF is fitted in the concave groove G with a certain thickness FW. The depth of the concave groove G is a distance FD from the edge FC of the rim of the spectacle frame SF.

  When the lens LE having refractive power is attached to the spectacle frame SF instead of the demo lens SL provided in the spectacle frame SF in FIG. 8, the thickness of the periphery (edge) of the lens LE is thicker than the thickness FW of the demo lens SL. Become. For this reason, as shown in FIG. 9, for example, step processing (stepped processing) is performed by the step processing tool 340 on the rear surface side of the peripheral edge of the finished lens LE, and the concave groove G of the rim of the spectacle frame SF is processed. A stepped portion STT having a wall surface Sta on the rear surface side of the lens periphery and a skirt surface Stb extending from the wall surface Sta to the lens rear surface side is formed so as to leave a protruding portion LSt for fitting into the lens.

  An operation example of step processing for forming the stepped portion STT at the periphery of the lens LE will be described below. FIG. 10 is an operation flowchart related to step machining in the embodiment.

  The control unit 50 acquires the target lens shape data TD and the step forming data TSD for leaving the protruding portion LSt (S1). The target lens shape data TD and the step formation data TSD can be obtained by a known method. For example, the target lens shape data TD and the step formation data TSD are obtained as follows.

  In a state where the demo lens SL is attached to the spectacle frame SF, the operator puts a mark with a pen or the like along the inner boundary of the rim on the lens surface of the demo lens SL. After the demo lens SL is removed from the spectacle frame SF, the contour of the demo lens SL and the inner boundary to which the mark is attached are read by a known contour reading device (see, for example, JP-A-2012-185490). For example, by performing image processing on the image obtained by the contour reading device, the contour of the demo lens SL is extracted as shown in FIG. 11, and the target lens shape data TD (Tr, Tθ) that is the outer shape of the demo lens SL is obtained. Is obtained. Tθ is data on the radial angle of the target lens shape with respect to the geometric center CO of the target lens shape, and Tr is data on the radial length of the target lens with respect to the geometric center CO of the target lens shape. Further, the image of the inner boundary of the mark attached to the demo lens SL is subjected to image processing, so that cut locus data TSD1 (TSr, Tθ) is obtained as data used as one of the step formation data TSD. TSr is radial length data of the cutting locus data with respect to the geometric center CO. The radial angle Tθ is, for example, data every 0.36 degrees. In this case, the radial length Tr and the radial length TSr are obtained every 1000 radial angle Tθ.

  Further, the thickness information LSW (see FIG. 9) of the protruding portion LSt used as one of the step formation data TSD is obtained by measuring the thickness FW (see FIG. 8B) of the demo lens SL. The thickness information LSW is set for each lens radial angle Tθ. In a typical embodiment, the thickness information LSW is a constant value as in the demo lens SL. However, the thickness information LSW may be changed according to the radius vector angle Tθ of the lens.

  The target lens shape data TD and the step formation data TSD (for example, the cutting locus data TSD1 and the thickness information LSW) obtained in this way are input to the processing apparatus 1 via the host computer 1000 and acquired by the control unit 50. The acquired target lens shape data TD and step difference formation data TSD are stored in the memory 51.

  Note that the cutting trajectory data TSD1 can be input by using the setting screen displayed on the display 20 by the operator measuring the depth distance FD of the concave groove G of the spectacle frame SF. The thickness information LSW can also be input using a setting screen displayed on the operator display 20. The control unit 50 acquires the step formation data TSD based on the data input by the display 20. The display 20 is used as an example of an input unit for the step formation data TSD.

  Next, the control unit 50 acquires the layout data of the lens LE with respect to the target lens shape data TD (positional relationship data of the optical center of the lens LE with respect to the target lens shape) (S2). This can be set, for example, by an operator through a layout data setting screen displayed on the display (input unit) 20. If the data is set by another apparatus, the layout data is input to the processing apparatus 1 via the host computer 1000 and acquired by the control unit 50.

  As described above, when the condition data necessary for lens processing is acquired, the process proceeds to the lens shape measurement step of the lens LE (S3). The control unit 50 controls each mechanism of the position adjustment unit 110 based on the target lens shape data TD and also controls the driving of the driving unit 16 of the measuring unit 500, and the front side of the lens LE held by the lens chuck shafts 222F and 222R. Information on the position of the refracting surface and the rear refracting surface (position in the lens chuck axial direction) is obtained for each radial angle of the lens LE. The positions of the front surface and the rear surface of the lens LE are obtained as positions corresponding to the target lens shape (the radial length Tr of the target lens data TD), for example.

  Further, the control unit 50 obtains the curve information (tilt information) of the front lens refractive surface from the data obtained by the measurement unit 500. The curve information of the front refractive surface can be obtained mathematically, for example, by using at least four points of the front refractive surface data corresponding to the target lens shape. In another example, the curve information of the lens front refracting surface can be obtained mathematically by obtaining position information at different distances from the center of the lens chuck for each radial angle near the position corresponding to the target lens shape. it can. Further, the curve information of the lens front refractive surface can be obtained via the host computer 1000 if the design data of the lens LE is obtained.

  When the lens shape measurement process is completed, the process proceeds to a lens processing process according to the lens processing program. The lens processing program is stored in the control unit 50. First, the process proceeds to a step of roughing the periphery of the lens LE (S4). The control unit 50 controls the driving of each mechanism of the position adjustment unit 110, adjusts the relative positional relationship of the lens LE (lens chuck shafts 222R, 222F) with respect to the roughing tool 320a (processing tool rotating shaft 312a), Based on the target lens shape, the periphery of the lens LE is roughly processed by the rough processing tool 320a. The rough processing shape data is acquired by the control unit 50 so as to secure a certain finishing allowance for the target lens shape that will be the finishing processing shape, for example.

  In flat finishing, the direction of the edge surface (surface to be processed) after flat finishing of the lens LE is relative to the lens front refractive surface at a position corresponding to the target lens shape for each radius angle (for each lens rotation angle). Is set to a certain angle (for example, the normal direction). In this way, the protruding portion LSt remaining after the step processing enters the depth of the concave groove G of the spectacle frame SF, and the skirt surface Stb extending from the wall surface Sta to the rear side of the lens easily fits the rim of the spectacle frame SF. For this reason, also in rough machining, the control unit 50 has an angle adjustment mechanism so that the edge of the rough machining is in the normal direction at a position corresponding to the target lens shape for each radius angle (each lens rotation angle). 120 is controlled to adjust relative angles (tilt angles) of the lens chuck shafts 222F and 222R with respect to the processing tool rotation shaft 312a.

  Subsequently, the process proceeds to a flat finishing process (S5). The control unit 50 rotates the lens LE and controls the driving of each mechanism of the position adjustment unit 110, adjusts the positional relationship of the lens LE with respect to the flat finishing tool 334, and flattens the periphery of the lens LE based on the target lens shape. Flat finishing is performed by the finishing tool 334. At this time, as shown in FIG. 12, the control unit 50 makes the surface to be flattened with respect to the lens front refracting surface LEf at the position corresponding to the target lens shape to have a preset angle LTa (for example, the normal direction). In addition, the relative angle α1 between the processing tool rotation shaft 312e and the lens chuck shafts 222F and 222R is adjusted for each rotation angle of the lens. The angle α1 is an angle formed by the center axis 312eC of the processing tool rotation shaft 312e and the center axis 222C of the lens chuck shafts 222F and 222R.

  When the flat finishing is completed, the process proceeds to the step machining step by the step tool 340 according to the lens machining program (S6). A processing program for step processing includes first processing for forming a wall surface Sta of the stepped portion STT on the lens rear surface side and a lens rear surface from the wall surface Sta in order to form the stepped portion STT on the periphery of the lens LE by the step processing tool 340. The second processing for forming the bottom surface Stb extending to the side is set to be performed separately.

  FIG. 13 is a diagram illustrating step processing for forming a stepped portion on the lens rear surface side. In the first processing for forming the wall surface Sta, the control unit 50 determines the shape of the lens shape based on the inclination of the lens front curve with respect to the lens holding shaft (lens chuck shafts 222R, 222F) at the peripheral position of the lens front surface corresponding to the lens shape. The inclination angle of the wall surface Sta with respect to the lens holding shaft at each radial angle is set. For example, the control unit 50 sets the inclination of the wall surface Sta relative to the lens holding shaft so that the lens front surface position LPf1 of the peripheral edge of the lens LE is parallel to the lens front surface (tangential direction LfA at the lens front surface position LPf1). Further, the control unit 50 sets the width between the lens front surface and the wall surface Sta as the thickness information LSW.

  The control unit 50 drives the angle adjustment mechanism 120 so that the surface 340a perpendicular to the axial center of the processing tool rotation shaft 312f is parallel to the tangential direction LfA at the lens front surface position LPf1 at the outermost periphery of the lens LE. To adjust the relative axial angle between the lens holding shaft (lens chuck shafts 222F and 222R) and the processing tool rotation shaft 312f. Then, the control unit 50 positions the rear end position 345a of the machining surface 345 at a position separated from the front surface position LPf1 by the thickness LSW, and the rear end position 345a is cut to the cut position STc of the cut locus data TSD1. (See FIG. 14A.) The position adjustment unit 110 is controlled to adjust the distance relationship between the lens chuck shafts 222F and 222R and the processing tool rotation shaft 312f, and the processing surface in the axial direction of the lens chuck shafts 222F and 222R. The position of 345 is adjusted. Then, the control unit 50 drives the motors 220R and 220F to rotate the lens LE, and the angle adjustment mechanism 120 and the position adjustment unit 110 of the position adjustment unit 110 so as to perform this first processing at each radial angle of the cutting trajectory data TSD1. The moving mechanism 125 is controlled. Thus, in the first processing, the wall surface Sta is formed so as to be parallel to the inclination (tangential direction LfA) of the lens front surface at the position corresponding to the target lens shape at each radial angle of the target lens shape.

  When the radial length of the target lens is different for each radial angle, the position of the front surface position LPf1 in the lens radial direction changes, so the tangential direction LfA at each radial angle also changes. Therefore, in the first processing, the relative angle α1 between the processing tool rotation shaft 312f and the lens chuck shafts 222F and 222R is adjusted so that the inclination angle of the wall surface Sta can be changed according to the tangential direction LfA at each radial angle. The

  When the first processing is completed, the control unit 50 controls the position adjustment unit 110 to disengage the step processing tool 340 from the lens LE, and then proceeds to the second processing for forming the skirt surface Stb (FIG. 14B). )reference). In this second machining, for example, the control unit 50 controls the angle adjustment mechanism 120 so that the relative angle α1 becomes larger than that during the first machining at the same radius angle during the first machining, and the step addition is performed. The bottom surface Stb is formed by the tool 340. For example, regardless of the inclination angle of the wall surface Sta, the control unit 50 has an angle β1 formed by the direction STbB of the base surface Stb and the lens chuck shafts 222F and 222R (for example, each radial angle of the target lens shape). The angle adjusting mechanism 120 is controlled so as to be a certain angle), and the skirt surface Stb is formed. Regardless of the inclination angle of the wall surface Sta, the appearance of the skirt surface Stb observed when the lens is viewed from a specific direction can be improved by processing the skirt surface Stb with the expected angle β1.

  For example, in the second processing for forming the base surface Stb, the direction of the base surface Stb is such that the width Std (see FIG. 13) of the base surface Stb when the lens LE after processing is viewed from the front direction Fa looks inconspicuous. An angle β1 formed by STbB and the lens chuck shafts 222F and 222R is set. The front direction Fa is, for example, a direction perpendicular to the front refractive surface of the lens LE at the geometrical center OC of the target lens shape.

  When the lens LE is held on the lens chuck shafts 222F and 222R, the lens is held so that the holding center thereof coincides with the geometric center OC of the target lens shape (usually called a frame center chuck). The front direction Fa can be regarded as the axial direction of the lens chuck shafts 222F and 222R. Therefore, in the second machining of the bottom surface Stb, the angle PA formed by the surface orthogonal to the center axis 312fc and the machining surface 345 is known (see FIG. 4), and therefore, based on the set angle β1, A relative angle α1 with the lens chuck shafts 222F and 222R is determined.

  Here, when the lens LE is viewed from the front direction Fa, the angle β1 for making the width Std of the base surface Stb inconspicuous is preferably 0 degrees parallel to the front direction Fa. However, the angle β1 is not limited to 0 degrees. The angle β1 only needs to approximate 0 degrees. For example, the absolute value of the angle β1 is set to 5 degrees or less. In the embodiment, it is set to 2.5 degrees.

  Returning to the explanation of the second processing. The control unit 50 controls the angle adjustment mechanism 120 so that the angle formed between the processing surface 345 of the step processing tool 340 and the lens chuck shafts 222F and 222R becomes an expected angle β1, and the processing tool rotating shaft 312f and the lens are controlled. The relative angle α1 with the chuck shafts 222F and 222R is adjusted. Then, the control unit 50 controls the position adjusting unit 110 and positions the rear end position 345a of the processing surface 345 at the cutting position STc, thereby processing the portion remaining in the first processing with the processing surface 345. By performing such second processing at each radial angle of the cutting locus data TSD1 while rotating the lens LE, the base surface Stb is formed on the periphery of the lens LE.

  As described above, when the base surface Stb is formed at an angle β1 that is parallel to or approximate to the front direction Fa as the expected angle β1, the edge surface that is observed when the processed lens LE is viewed from the front direction ( The width Std of the base surface can be made inconspicuous, and a good-looking lens can be provided. Note that the angle β1 only needs to be within an allowable range set so as to make the edge Std (bottom surface) width Std inconspicuous when viewed from a specific direction.

  Further, the conical angle PA of the tapered (conical) processing surface 345 included in the step processing tool 340 is an angle of the base surface Stb at least in the vicinity of the radial angle where the temple SFT (see FIG. 8) of the frame SF is located. In order to process the bottom surface Stb so that β1 falls within the allowable range, the bottom surface Stb is configured to have an angle SA or less formed by the wall surface Sta and the bottom surface Stb. The angle SA is a value when, for example, a lens in which the maximum diameter of the lens shape of the lens LE is 70 mm and the curve value of the front surface of the lens is 8 curves is assumed. In a typical example, the angle PA of the processing surface 345 is 60 degrees or less.

  Further, in the above embodiment, the base surface Stb is formed at a constant angle β1 with respect to the lens chuck shafts 222F and 222R, and the wall surface Sta changes in angle with respect to the lens chuck shafts 222F and 222R according to the moving radius of the target lens shape. It is done. Therefore, the angle SA formed by the wall surface Sta and the bottom surface Stb can be changed at least in part of the radial angle. The control unit 50 performs the first processing of the wall surface Sta and the second surface of the base surface Stb so that the angle SA formed by the wall surface Sta and the base surface Stb changes at least at the radial angle of the target lens shape. In the processing, the angle adjusting mechanism 120 is separately controlled to process the wall surface Sta. As a result, the angle formed by the wall surface Sta and the bottom surface Stb is not constant as in the prior art, and there is a degree of freedom, so that a more appropriate step portion can be processed.

  As described above, in the typical embodiment, the first process for forming the wall surface Sta and the second process for forming the bottom surface Stb are separately performed, and thus step processing for forming the stepped portion STT is performed. Can increase the degree of freedom.

  Further, the control unit 50 sets the relative angle α1 between the processing tool rotation shaft 312f and the lens chuck shafts 222F and 222R with respect to the time of the first processing regardless of the inclination angle of the wall surface Sta at the same radius vector angle of the first processing. Change. Thereby, the freedom degree of a process of the base surface Stb is raised. If the relative angle α1 is set so that the base surface Stb falls within the allowable range of the angle β1, the appearance of the base surface Stb when viewed from the front direction Fa can be improved.

  In the above exemplary embodiment, the wall surface Sta is parallel to the tangential direction at the lens front surface position LPf1, but the formation of the wall surface Sta is not limited to this. For example, the operator arbitrarily selects the inclination angle of the wall surface Sta (for example, an angle with respect to the lens front surface at the front surface position LPf1 or an angle with respect to the lens chuck shaft or the front direction Fa of the lens) at an arbitrary radial angle position of the target lens shape. It is also possible to set to.

  For example, the eyeglass frame SF may be a sports frame, and the shape of the left and right ends of the target lens shape TD may be acute as shown by the symbol LPP in FIG. In this case, as shown in FIG. 16, if the wall surface Sta is formed so that the tip end portion of the protruding portion LSt is thinner than the lens center side, the protruding portion LSt can be easily framed in a sports frame.

  When the tapered protruding portion LSt as shown in FIG. 16 is formed, for example, the control unit 50 acquires the angle SRC formed by the tangential direction LfA at the front surface position LPf1 and the wall surface Sta as a part of the step formation data TSD.

  For example, the figure of the target lens shape TD and the figure of the cut locus data TSD1 as shown in FIG. The operator uses a known device such as a touch pen to specify a range LPP (a range of the radial angle of the target lens) in which the protruding portion LSt is tapered on the target lens TD figure. Further, the taper angle SRC is set in the input field 20a. Instead of the angle SRC, the width LSC (see FIG. 16) at the tip of the protruding portion LSt may be set in the input field 20b. With this setting, the control unit 50 acquires the inclination angle (for example, the angle with respect to the lens chuck axis) of the wall surface Sta in the range LPP as a part of the step formation data TSD. In addition, the control unit 50 obtains the inclination angle of the wall surface Sta so that the connection is smooth at a location adjacent to the range LPP. In the first process for forming the wall surface Sta, the angle adjusting mechanism 120 is controlled based on the acquired inclination angle of the wall surface Sta, and the wall surface Sta is processed by the step processing tool 340. As a result, it is possible to obtain the lens LE in which the protruding portion LSt that can be easily put into the frame SF is formed.

  In the above embodiment, an example in which the stepped portion STT is formed on the rear surface side of the lens LE has been described, but the formation of the stepped portion is not limited to the lens rear surface side. FIG. 17 shows an example in which a protruding portion LSt protruding in the radial direction of the lens periphery is left and a stepped portion STTf is formed on the front side of the lens LE in addition to the stepped portion STT on the rear surface side of the lens LE.

  In the first processing, the control unit 50 performs, for example, a wall surface Staf with respect to the lens holding shaft at each radial angle of the lens shape based on the lens front curve at the peripheral position of the lens front surface corresponding to the lens shape (position LPf1 in FIG. 13). Set the tilt angle. For example, the control unit 50 includes the lens holding shaft and the processing tool rotation shaft 312f so that the surface 340a orthogonal to the axial center of the processing tool rotation shaft 312f is parallel to the tangential direction LfA at the lens front surface position LPf1. Adjust the relative axis angle of. Further, the position of the wall surface Staf in the lens rear surface direction with respect to the lens front surface position LPf1 is set based on the step formation data acquisition information obtained in advance. For example, the control unit 50 sets the position of the wall surface Staf at a position offset by a certain amount from the lens front surface position LPf1. Then, the control unit 50 sets the cut-in position Stcf at each radial angle based on the front-side cut locus data TSD1 included in the step formation data acquisition information. Based on these setting data, the control unit 50 controls the angle adjusting mechanism 120 and the moving mechanism 125 of the position adjusting unit 110, and performs the first processing for forming the front wall surface Ftaf as shown in FIG. .

  When the first processing is completed, the process proceeds to the second processing for forming the bottom surface Stbf. Also in the formation of the skirt surface Stbf, the direction STbC of the skirt surface Stbf and the lens chuck shafts 222F and 222R so that the width Std (see FIG. 17) of the skirt surface Stbf when the lens LE is viewed from the front direction Fa are inconspicuous. Is set. Similarly to the rear skirt surface Stb, the angle β2 suffices to be within an allowable range set in order to make the edge Stuff (bottom surface) width Stdf of the lens inconspicuous when viewed from a specific direction. For example, the angle β2 is 0 degrees or the absolute value of the angle β1 is 5 degrees or less. In the embodiment, it is set to 2.5 degrees.

  As shown in FIG. 18B, the control unit 50 controls the angle adjusting mechanism 120 so that the angle formed between the processing surface 345 of the step processing tool 340 and the lens chuck shafts 222F and 222R becomes an expected angle β2. And the relative angle between the processing tool rotating shaft 312f and the lens holding shaft is adjusted. The control unit 50 controls the position adjustment unit 110 and causes the step processing tool 340 to process the portion remaining in the first processing. Such second processing is performed at each radial angle of the cutting locus data TSD1 while rotating the lens LE, so that a skirt surface Stbf is formed on the periphery of the lens LE.

  As described above, in the exemplary embodiment, the first process for forming the wall surface Staf and the second process for forming the bottom surface Stbf are separately performed on the front surface of the lens. The degree of freedom of step processing to be formed can be increased. In a typical embodiment, the width Std of the edge surface (bottom surface Stbf) observed when the processed lens LE is viewed from a specific direction can be made inconspicuous, and a good-looking lens is provided. can do.

  Further, when the stepped portion STTf is formed on the front surface side of the lens LE, the wall surface at an arbitrary radial angle position of the target lens shape using the display 20 shown in FIG. 15, similarly to the wall surface Sta on the rear surface side. It is also possible to arbitrarily set the Staf inclination angle.

  In the example of FIGS. 17 and 18, the step portions STT and STTf are formed on both the lens rear surface side and the lens front surface side. However, the step portions STTf may be formed only on the front surface side.

  Further, in the above-described embodiment, an example in which the peripheral edge of the lens to be step-processed is flat-finished, but finishing processing in which a bevel is formed by the beveling tool 332 may be used. In this case, the tip shape of the protruding portion LSt in the radial direction is a beveled slope formed by the V groove 331.

  Note that the technology disclosed in the present invention is not limited to application to the devices described in the embodiments. For example, the disclosed technique of the present invention can be applied by supplying the lens processing program of the above-described embodiment to the control device of the lens processing apparatus or the lens processing system via a network or a storage medium.

DESCRIPTION OF SYMBOLS 1 Eyeglass lens processing apparatus 50 Control unit 20 Display 100 Lens processing part 110 Position adjustment unit 120 Angle adjustment mechanism 130 X-axis moving mechanism 140 Z-axis moving mechanism 150 Y-axis moving mechanism 222F, 222R Lens chuck shaft 312f Processing tool rotating shaft 340 Step Processing tool 345 Processing surface 1000 Host computer

Claims (4)

A spectacle lens processing apparatus for processing a peripheral edge of a spectacle lens held on a lens holding shaft ,
A processing tool for forming a stepped portion on the periphery of the spectacle lens that has been finished into a lens shape, and a processing tool for forming a wall surface of the stepped portion and a skirt surface extending from the wall surface to the lens surface side,
A processing tool rotating shaft to which the processing tool is attached;
Position adjustment means for adjusting a relative positional relationship between the spectacle lens and the processing tool, the position having an axis angle changing means for changing a relative axial angle between the lens holding shaft and the processing tool rotation axis. Adjusting means ;
A data obtaining unit for obtaining a step-forming data for forming the step portion on the lens front surface of the curve information and the lens peripheral edge,
The position adjusting means is controlled based on the acquired step forming data, and a first process for forming the wall surface by the processing tool and a second process for forming the skirt surface by the processing tool are separately performed. Control means, and
The control means sets an inclination angle of the wall surface with respect to the lens holding axis at each radial angle of the target lens in the first processing based on the curve information of the lens front surface, and sets the axis based on the set inclination angle. The wall surface is formed by controlling the angle changing means, and in the second machining, the angle formed by the holding shaft and the base surface at each radial angle of the target lens is set regardless of the inclination angle of the wall surface. An eyeglass lens processing apparatus, wherein the base surface is formed by controlling the shaft angle changing means so as to have an expected angle . 2. The spectacle lens processing apparatus according to claim 1 , wherein in the first processing, the control means determines the inclination angle of the wall surface with respect to the lens holding shaft at each radial radius of the target lens in a tangential direction at the lens front surface position of the lens peripheral edge. In the second processing, the skirt surface is formed so that an angle formed by the holding shaft and the skirt surface at each radial angle of the target lens is a constant angle. Eyeglass lens processing device. 2. The eyeglass lens processing apparatus according to claim 1, wherein the processing tool has a tapered processing surface, and an angle formed by a surface orthogonal to a central axis of the processing tool and the processing surface is an acute angle. Lens processing device. A processing tool for forming a stepped portion at the periphery of a spectacle lens held by a lens holding shaft and finished into a target shape, and a position adjusting means for adjusting a relative positional relationship between the spectacle lens and the processing tool; Eyeglasses executed in a control device for controlling the operation of the eyeglass lens processing apparatus , comprising: a position adjusting means having an axis angle changing means for changing a relative axis angle between the lens holding shaft and the processing tool rotation axis. A lens processing program,
So as to form a skirt surface that extends from the wall and the wall surface of the stepped portion machined lens periphery finishing the target lens shape on the lens surface, the lens front surface curve information and the step forming the data acquired by the data acquisition means based controlling the position adjusting means, wherein a second processing and control steps for separately performed to form the first processing and the foot surface to form the wall surface by the processing tool, the lens in the first processing An inclination angle of the wall surface with respect to the lens holding axis at each radial angle is set based on the curve information of the lens front surface, and the wall angle is formed by controlling the shaft angle changing means based on the set inclination angle. In the second machining, the angle formed by the holding shaft and the base surface at each radial angle of the target lens is an expected angle set irrespective of the inclination angle of the wall surface. Eyeglass lens processing program for causing to execute a control step of forming said skirt surface by controlling the shaft angle changing unit to the control device.

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