JPH03270860A - Spectacle lens grinding machine with frame tracing device - Google Patents

Abstract

PURPOSE:To have accurate and easy V-shape processing by measuring the shape near the end face prior to V-shape processing, and expressing the position relationship of a unprocessed spectacle lens in the condition ready for processing with a grinding element for V-shape processing in the ocular expression using a display means. CONSTITUTION:A lens frame and a template form measuring instrument 2 are incorporated in the upper part of a device concerned, and ahead of it are installed a display 3, which displays the results from measurement and calculation in characters or graphics, and an input part 4 which is fed with the appropriate data and gives instruction to the device. In the front part of the device a lens shape measuring device 5 is installed, which measures the assumed end face thickness of an unprocessed lens, and also a lens grinding part 6 is provided, wherein a grinding element 60 consisting of a coarse grinder 60a for glass, a coarse grinder 60b for plastics, and a grinder 60c for V-shape processing and flat processing is mounted rotatably on a rotary shaft 61. The shape around the end face of the spectacle lens is measured prior to the V-shape processing, and the position relationship of the unprocessed spectacle lens in the condition ready for processing with the grinder 60 for V-shape processing is expressed on the display 3 in ocular expression.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an eyeglass lens grinding machine (drilling machine) having an eyeglass frame tracing device.

[Prior art and its problems] Eyeglass lens grinding machines have been known that have a bevel grinding wheel for forming a bevel on the peripheral edge of the lens in order to support the lens in the frame groove of the lens frame.

The important points to keep in mind when processing this bevel are the position of the apex of the bevel within the edge and the bevel curve. However, in the past, the position of the bevel apex and the setting of the bevel curve had to depend on the intuition and experience of the operator.

In order to solve the above-mentioned drawbacks, a method is known in which the lens bevel shape is displayed as a cross-sectional shape in the meridian direction at an arbitrary lens radius, and the bevel apex position and bevel curve are determined by moving the bevel display position. ing. This device has an edge thickness measuring means for measuring the edge thickness of the lens to be processed, and information on the edge thickness obtained from the edge thickness measuring means and the bevel shape of the bevel grinding wheel can be used to obtain information after beveling the lens to be processed. The expected lens bevel shape is calculated and the result is displayed.

However, since the above configuration only displays the cross section of the lens after processing, it cannot display the cutting allowance of the lens, especially the cutting allowance near the top of the bevel, so it has the disadvantage that information regarding processing is insufficient. there were.

The present invention has been devised in view of the above-mentioned drawbacks, and provides an eyeglass lens grinding machine having an eyeglass frame tracing device that allows sufficient processing information to be obtained in advance and allows easy confirmation of the processing information during bevel processing. The technical challenge is to provide this.

[Structure of the Invention] In order to achieve the above object, the present invention uses a beveling machine that performs bevel processing when processing eyeglass lenses, and measures the shape near the edge of the eyeglass lens before bevelling, and determines the processing state. The present invention is characterized by being provided with a display means for visually expressing the positional relationship between the unprocessed spectacle lens and the beveling grindstone.

[Example] An example of the present invention will be described in detail below based on the drawings.

(1) Overall structure of the apparatus FIG. 1 is a perspective view showing the overall structure of a lens grinding apparatus according to the present invention.

Reference numeral 1 denotes a base of the device, on which the various parts constituting the lens grinding device are arranged.

2 is a lens frame and template shape measuring device built in the upper part of the device.

In front of it are lined up a display section 3 that displays measurement results, calculation results, etc. in text or graphics, and an input section 4 that inputs data and gives instructions to the device.

(Hereinafter, blank space) At the front of the device is a lens shape measuring device 5 that measures the virtual edge thickness, etc. of an unprocessed lens.

Reference numeral 6 denotes a lens grinding section, in which a grindstone 60 consisting of a rough grindstone 60a for glass lenses, a rough grindstone 60b for plastics, and a bevel and manual grinder 60c is rotatably attached to a rotating shaft 61. The rotating shaft 61 has a band 62 on the base 1.
is fixed.

A pulley 63 is attached to the end of the rotating shaft 61. The pulley 63 is connected via a belt 64 to a pulley 66 attached to the rotating shaft of an AC motor 65. Therefore, when the motor 65 rotates, the grindstone 60 rotates.

7 is a carriage portion, and 700 is a carriage.

(2) Structure and operation of each part (a) Carriage part The structure will be explained based on FIGS. 1 to 3. Second
The figure is a sectional view of the carriage. Fig. 3-a is a view taken along arrow A, showing the carriage drive mechanism, and Fig. 3-b is a sectional view taken along line BB.

A carriage shaft 702 is rotatably and slidably supported on a shaft 701 fixed to the base 1, and a carriage 700 is also rotatably supported on the shaft 702.

The carriage shaft 702 has timing pulleys 703a, 703b, and 703c each having the same number of teeth at the left end,
The far right is stuck between 'c' and 'c'.

Lens rotation axes 704a and 704b are coaxially and rotatably supported on the carriage 700, parallel to the shaft 701 and at an unchanging distance. The lens rotation axis 704b is the rack 7
The rack 705 is rotatably supported by the rack 705, and is further movable in the axial direction by a pinion 707 fixed to the rotating shaft of the motor 706.
This allows the lens LE to
It can be sandwiched between b. Note that the lens rotation axes 704a, 704
Pulleys 708a each have the same number of teeth in b.

708b is attached, and they are connected to pulleys 703c and 703 by timing belts 709a and 709b.
It is connected to b.

An intermediate plate 710 is rotatably fixed to the left side of the carriage 700. A cam follower 711 is installed on the intermediate plate 710.
are attached, which sandwich a guide shaft 712 fixed to the base 1 in a position parallel to the shaft 701. A rack 713 is attached to the shaft 7 on the intermediate plate 710.
The pinion 715 is attached to the rotating shaft of a motor 714 for moving the carriage left and right, which is fixed to the base 1 in a position parallel to the pinion 715. These structures allow the motor 714 to move the carriage 700 in the axial direction of the shaft 701.

A drive plate 716 is fixed to the left end of the carriage 700, and a rotating shaft 717 is rotatably attached to the drive plate parallel to the shaft 701. At the left end of the rotating shaft 717 is a pulley 7 having the same number of teeth as the pulleys 708a and 708b.
18, and the pulley 718 is connected to the pulley 703a by a timing belt 719.

A gear 720 is attached to the right end of the rotating shaft 717.
Gear 720 meshes with a gear attached to motor 721. When the motor 721 rotates, the pulley 718 is rotated by the gear 720, and the carriage shaft 702 is coaxially connected via the timing belt 719. This causes the pulleys 703b, 703C1, timing belt 709a,
709 b.

Lens chuck shaft 7 via pulleys 708a and 708b
Rotate 04 a, 704 b.

The block 722 is fixed to the drive plate 716 so as to be coaxial with the rotating shaft 717 and rotatable, and the motor 721 is fixed to the block 722.

A shaft 723 is fixed to the intermediate plate 710 in a direction parallel to the shaft 701, and a correction block 724 is rotatably fixed to the shaft 723. round rack 7
25 is arranged parallel to the shortest line segment connecting the axes of the rotating shaft 717 and the shaft 723, and is slidable through holes made in the block 722 and the correction block 724. A stopper 726 is fixed to the round rack 725 and can only slide downward from the contact position of the correction block 724.

A sensor 727 is provided on the intermediate plate 710, and the stopper 7
26 and the correction block 724, it is possible to know the grinding state of the lens.

Rotating shaft 72 of motor 728 fixed to block 722
A pinion 730 fixed to the shaft 723 is engaged with the round rack 725, and thereby the rotating shaft 717 and the shaft 723 are connected to each other.
The distance between the axes γ' can be controlled by the motor 728.

Furthermore, such a structure maintains a linear relationship between γ' and the rotation angle of the motor 728.

The distance between the axes (B-C) between the grindstone rotation center B and the shaft 701 is α, the distance between the axes (A-C) between the lens chuck shafts 704a and 704b and the shaft 701 is β, and the lens chuck shaft 7
The distance between the shafts 04a and 704b and the center of rotation of the grinding wheel is γ, the angle between α and β is θ, and the shaft 723 and the shaft 711
α′, the axis-to-axis (CD) distance of rotation axis 717 and shaft 7
01 is the center-to-axis (C-E) distance β', and the angle formed by α- and β- is θ'. (The following is a blank space.) The positional relationship is schematically shown in Fig. 4.

α, α−1β, and β− remain unchanged, and furthermore, the center of rotation of the grinding wheel and each center point of the shaft 701.723 remain unchanged on the plane of the figure, and the lens chuck axes 704a, 70
4b and the center point of the rotating shaft 717 rotate around the shaft 701 while their relative positional relationship remains unchanged.

Here, if θ=θ' and α-/α=β'/β, ΔABC and ΔEDC are similar.

At this time, α'/α=γ'/γ, and 17' and γ have a linear correlation.

With this structure, the block 722 to which the motor 721 that rotates the pulley 718, which rotates around the rotating shaft 717, is fixed, rotates around point E by following the change in CED when γ' is changed. Rotate.

At this time, the rotation of the pulley 718 rotates the lens shafts 704a and 704b at a constant speed as described below.

γ′ by the motor 728 while rotating the pulley 718.
When and γ are changed, the rotation angle of the pulley 718 when viewed from the line segment ED as the reference line and the rotation angle of the lens axis when viewed from the line segment AB as the reference line become equal. Also, a motor 721 and a lens shaft 704a.

There is also a linear correlation in the rotation of 704b. In other words, the distance between the grinding wheel axis and the lens axis changes in correlation with the rotation angle of the output shaft of the motor 728, and the lens shafts 704a and 704b change with the rotation angle of the output shaft of the motor 721 using the line segment AB as a reference line. Rotates linearly with the angle.

A hook of a spring 731 is hung on the drive plate 716,
A wire 732 is hung on the hook on the opposite side. A drum is attached to the rotating shaft of a motor 733 fixed to the intermediate plate 710, and the wire 732 can be wound up. Thereby, the grinding pressure of the grindstone 60 of the lens LE can be changed.

(b) Lens frame and template shape measurement unit (tracer) (a)
Structure The structure of the lens frame and template shape measuring section 2 will be explained based on FIGS. 5 and 6.

FIG. 5 is a perspective view showing a lens frame and a template shape measuring section according to this embodiment. The headquarters is built into the main body,
It is mainly composed of two parts: a frame and template holding section 2000 that holds the frame and template, and a measuring section 2100 that digitally measures the shapes of the lens frame and template of the frame. The frame and template holder 2000 is further composed of two parts, a frame holder 200OA and a template holder 2000B.

Frame holding unit In FIG. 6-1 showing the frame holding unit 200OA,
When the eyeglass frame is set in the frame holder 2000A, the approximate geometric center point of the lens frame is the reference point ORSQL
The straight line passing through these two points is defined as the reference line.

The frame holding unit 200OA has a housing 2001. The center arm 2002 is slidably mounted on guide shafts 2003a and 2003b attached to the surface of the casing 2001, and the tip of the center arm 2002 has frame stampings 2004.200 at the same interval as the OR and OL.
There are 5.

Similarly, the light arm 2006 is the guide shirt) 200
7a and 2007b, a left arm 2009 is slidably placed on guide shafts 2010a and 201Ob, respectively, and a frame press 2008 is placed at the tip of the right arm 2006, and a frame is placed at the tip of the left arm 2009. A pusher 2011 is rotatably supported.

Center arm 2002 has frame stamping 2004.20
The light arm 2006 slides in the direction perpendicular to the reference line so that the light arm 2006 passes through the OR and OL.
passes through OR, left arm 2009 is frame press 2
011 slides in a direction tilted approximately 30 degrees from the reference line so that it passes through the OL.

In Figure 6-2, frame stamping 2004゜2005
．． 2008.2011 are two slopes that intersect each other (2012a, 2012b), (2014a
, 2014 b), (2016a 2016 a)
, (2018a, 2018 b), and the ridgeline 2013.2015.2017 created by each two slopes
．． 2019 is on the same plane (measurement plane), and the rotation axes of frame presses 2008 and 2011 are also on this measurement plane.

Further, a semicircular frame press 2020 is slidably mounted on the guide shafts 2021a and 2021b attached to the center arm 2002, and in FIG.
Spring 20 so as to always pull 020 towards the center arm side.
22 is hung on a pin 2023a planted in the center arm 2002, and the other end is hung on a pin 2023b planted on the frame press 2020.

FIG. 6-4 is a diagram of a part of the housing 2001 viewed from the back side.

Boo 9-2024a is on the back side of the housing 2001.

2024b, 2024c, and 2024d are rotatably supported, wires 2025 are hung from the boots 9-2024a to 2024d, and the holes 2028 of the housing 2001
It is fixed to a pin 2026a implanted in the center arm 2002 and a pin 2027 implanted in the light arm 2006, which protrude from the back surface through the a and 2029a.

Similarly, pulleys 2030a and 2 are attached to the back of the housing 200.
030b, 2030c, and 2030d are rotatably supported, and pulleys 2030a to 2030d have wires 2
031 is hung in the hole 2028b of the housing 2001.
, 2029b, and is fixed to a pin 2026b implanted in the center arm 2002 protruding from the back surface and a pin 2032 implanted in the left arm 2009.

In addition, a center arm 2002 is provided on the back side of the housing 2001.
A constant torque spring 2033 that constantly pulls the drum 2 in the OR and OL directions is rotatably supported on the back surface of the casing 2001.
034, and one end of the constant torque spring 2033 is attached to the pin 203 implanted in the center arm 2002.
It is fixed to 5.

In addition, a claw 2036 is implanted in the center arm 2002, and when the frame is not held,
It is in contact with a microswitch 2037 attached to the back surface of the housing 2001, and determines the state of frame retention.

A rim thickness measuring section 2040 that measures the thickness of the rim of the frame is incorporated into the left arm 2009.

A pulley 2 is attached to the rotating shaft 2041 of the frame press 2011.
042 is fixed and rotates together with the frame press 2011, and the frame press 20 is attached to this rotating shaft 2041.
A pulley 2043 that rotates independently of the rotation of
has been planted.

In addition, the left arm 2009 includes a hollow rotating shaft 204.
5 is rotatably supported on a shaft, and a potentiometer 2046 is attached to one end, and a pulley 2047 is attached to the other end. A wire 2049 whose both ends are fixed to each pulley is hung between the pulleys 2042 and 2047, and the potentiometer 2046 and frame presser 2011 are always linked and rotated in the same direction.

In FIG. 6-5, one end of a wire 2050 is fixed to a pulley 2043, the other end is fixed to a pulley 2048 in the middle, and the other end is attached to the left arm 200 through a spring 2051.
The shaft of the potentiometer 2046 rotates in accordance with the movement of the rim thickness measuring pin 2044.

In this example, the rim thickness is measured only at one location, but by attaching a contact that can move up and down and detect the amount of movement to the measuring stylus 2120, and bringing it into contact with the front surface of the rim when measuring the shape of the lens frame, the rim thickness can be measured at one location. The vertical position of can be detected. The rim thickness around the entire circumference of the lens frame can be measured from the data on the front surface of the rim and the data on the vertical direction of the V-groove.

In FIG. 6-6, a press board 2061 with brake rubber 2062 pasted on the - side is placed on the housing 2001.
It is rotatably attached by a shaft 2063 attached to the housing 2001, and one end of the sliding shaft of the solenoid 2064 attached to the housing 2001 is attached to the pressing plate 2061.

Also, one end of the spring 2065 is hung on the pressing plate 2061, and the other end is hung on a pin 2066 planted in the housing 2001, so that the spring 2065 is normally pressed in a direction where the brake rubber 2062 does not come into contact with the center arm 2002. The plate 2061 is being pulled. When the solenoid 2064 acts and pushes the pressing plate 2061 against the spring 2065, the brake rubber 2062
comes into contact with the center arm 2002, and the center arm 2
002 and a right arm 2006 and a left arm 2009 that move in conjunction with the center arm 2002 are fixed.

Template Holding Unit The template holding unit 2000B is shown in FIG. 5 and FIG.
b, 2071c, 2071d.

The substrate 2072 is fixed to the pillars 2071a to 2071d. The lid 2073 has a shaft 2 implanted in the lid 2073.
074a and 2074b are engaged with bearings 2075a and 2075b formed on the substrate 2072, and are rotatably placed on the substrate 2072. The substrate 2072 has holes sufficient to allow the spectacle frame to be inserted into and removed from the frame holder. A transparent window 2076 is formed in the lid 2073, and a template holder 2077 is fixed to the center of the window 2076. The template holder 2077 has a pin 2078a,
2078b is implanted, engage the pins 2078a and 2078b with the holes formed in the template, and then tighten the setscrew 2.
At 079, the template is fixed to the template holder 2077.

The center of this template holder 2077 is configured to be located on the OR when the lid 2073 is closed.

Measuring part Next, the configuration of the measuring section 2100 will be explained based on FIG. 7.

Figure 7-1 is a plan view of the measuring section, and Figure 7-2 is its C-
It is a sectional view of C.

The movable base 2101 has shaft holes 2102a and 2102b.
, 2102c are formed and are slidably supported by shafts 2103a and 2103b attached to the housing 2001. In addition, a lever 210 is attached to the movable base 2101.
4 is planted, and by sliding the movable base 2101 with this lever 2■04, the rotating base 2
The rotation center of 105 is the frame and template holding part 2000
Move to the OR and OL positions above. Movable base 2101
A rotating base 2105 on which a pulley 2106 is formed.
is rotatably supported. Pulley 2106 and pulse motor 2107 attached to movable base 2101
A belt 2109 is passed between the pulley 2108 attached to the rotating shaft of the pulse motor 2107, and the rotation of the pulse motor 2107 is thereby transmitted to the rotating base 2105.

On the rotating base 2105, there are four
Book rails 2110a, 2110b, 2110c, 21
10d is attached, and this rail 2110a,
A probe portion 2120 is slidably attached to the probe 211Ob. The measuring head part 2120 has a shaft hole 2 in the vertical direction.
121 is formed, and a probe shaft 2122 is inserted into this shaft hole 2121.

A ball bearing 2123 is interposed between the probe shaft 2122 and the shaft hole 2121, so that the probe shaft 212
The vertical movement and rotation of 2 are made smooth. An arm 2124 is attached to the upper end of the measuring head shaft 2122, and a bevel measuring head 2125 in the shape of a solo pan bead that contacts the bevel groove of the lens frame is rotatably supported on the upper part of this arm 2124. .

A cylindrical template measuring roller 2126 that contacts the edge of the template is rotatably supported at the lower part of the arm 2124.

Then, the bevel measuring element 2125 and the template measuring roller 212
The circumferential point No. 6 is configured to be located on the center line of the measuring stylus axis 2122.

Below the measuring tip 2122, a pin 2128 is installed in a ring 2127 that is rotatably attached to the measuring tip shaft 2122. Limited by hole 2129. At the tip of the pin 2128, there is a probe section 2120.
The potentiometer 2130 detects the amount of vertical movement of the probe shaft 2122 .

A roller 2131 is rotatably supported at the lower end of the probe shaft 2122 . Also, the probe section 2120 has a tab 213.
2 have been planted.

A pin 2133 is implanted in the measuring head part 2120,
A pulley 2135 is attached to the shaft of a potentiometer 2134 attached to the rotating base 2105. Pulleys 2136a, 2 are attached to the rotating base 2105.
136b is rotatably supported, and a wire 2137 fixed to a pin 2133 is connected to pulleys 2136a, 2.
136b and is fixed to the pulley 2139. In this way, the amount of movement of the probe section 2120 is detected by the potentiometer 2134.

Further, a constant torque spring 2140 is attached to the rotating base 2105 to constantly pull the probe section 2120 toward the tip side of the arm 2124.
is attached to a drum 2141 that is rotatably supported by a rotating base 2105, and a constant torque spring 2140
One end is connected to a pin 2142 implanted in the measuring head part 2 part 20.
is fixed to.

Rails 2110c and 2110d on the rotating base 2105
A probe drive unit 2150 is slidably attached to the top. A pin 2151 is implanted in the probe drive unit 2150, and a pulley 2153 is attached to the rotation shaft of a motor 2152 attached to the rotation base 2105. Pulleys 2154a, 2 are attached to the rotating base 2105.
154b is rotatably supported, and a wire 2155 fixed to a pin 2151 connects to pulleys 2154a, 2.
154b and is fixed to the pulley 2153. As a result, the rotation of the motor is controlled by the probe drive unit 2150.
transmitted to.

The probe drive section 2150 is configured to move the probe section 2 pulled toward the probe drive section 2150 by a constant torque spring 2140.
120, and by moving the probe drive section 2150, the probe section 2 can be moved to a predetermined position.

The probe drive unit 2150 also includes a probe shaft 21 at one end.
The shaft 2156 has an arm 2157 that abuts a roller 2131 that is rotatably supported at the lower end of the shaft 2156, and an arm 2158 that rotatably supports a roller 2159 at the other end.

The torsional spring 2161
One end is hung on the arm 2157, and the other end is fixed to the probe drive section 2150. When the probe drive section 2150 moves, the roller 2159 moves up and down along the guide plate 2160.

The shaft 2156 rotates due to the up and down of the roller 2159, and the shaft 21
An arm 2157 fixed to the probe 56 also rotates around the shaft 2156 to move the probe shaft 2122 up and down. Rotating base 2
A shaft 2163 is rotatably attached to 105, and a movable guide plate 2161 is fixed to this shaft 2163. One end of the sliding shaft of the solenoid 2164 attached to the rotating base 2105 is connected to the movable guide plate 2161.
It is attached to. One end of the spring 2165 is connected to the rotating base 2
105, and the other end is hung on the movable guide plate 2161, and normally the roller 2159 and the movable guide plate 216
The first guide portion 2162 is pulled to a position where it does not come into contact. When the solenoid 2164 acts and pulls up the movable guide plate 2161, the guide portion 216 of the movable guide plate 2161
2 moves to a position parallel to the fixed guide plate 2160, the rollers 2159 abut the guide part 2162, and the guide part 21
62.

(b) Operation Next, the operation of the above-mentioned lens frame and template shape measuring device 2 will be explained based on FIGS. 6 to 10.

Measurement of Lens Frame Shape First, the operation when measuring eyeglass frames will be explained.

The user selects which side of the lens frame of the glasses frame 500 is to be measured, and moves the measuring unit 2100 to the measuring side using a lever 2104 fixed to the movable base 2101.

Next, pull the frame pusher 2020 toward you to sufficiently widen the space between it and the center arm 2002. Frame press 2004.2005 slope 2 for the front part of the eyeglass frame
012a, 2012b, 2014a, and 2014b, the frame press 2020 is returned and brought into contact with the center portion of the eyeglass frame. Then center arm 200
2 while pushing down the rim thickness measuring pin 2044 with the rim part of the glasses frame.
08, 2011 slope 2016a, 2016b, 201
The left and right rim portions are brought into contact with 8a and 2018b.

In this example, frame stamping 2004°2005
．． 2008.2011 are linked, constant torque spring 2
033 in the direction toward the OR and OL, and the frame press 202o is pulled in the direction of the center arm by the spring 2022, so the frame press 2004.
2005, 2008, 2011, and 2020, the lens frame is held by forces in three directions, each directed toward the approximate geometric center of the lens frame.
20 makes the center position of the frame OR.

It is held at the midpoint of OL. In addition, frame pressing 200
8. 2011 is the ridgeline of the four frame stampings 2013.2
015.2017.2019 Because it rotates within the plane created by the lens frame, the center of the bevel groove on the lens frame
．． It is always held within the measurement plane at the center position of 2005, 2008°211.

In FIG. 8-1, the rim part of the lens frame presses down the rim thickness measuring pin 2044, and when the bevel groove is parallel to the measurement surface, the slopes 2018a, 2018 of the frame press 2011
The amount of movement of the rim thickness measuring pin 2044 can be detected by a potentiometer 2046 with reference to the ridge line 2019 formed by the rim 18b.

In Figure 8-2, if the bevel groove is at a certain angle with respect to the measurement surface, the frame press 2011 will tilt along the rim part, and the potentiometer 2 will be tilted by an amount equivalent to this tilt.
Since 046 is also tilted, the rim thickness can always be measured using the ridge line 2019 as a reference.

The rim thickness data thus obtained is compared with the edge thickness and used to determine the optimum position so that the rim of the frame and the front refractive surface of the lens are in appropriate positions.

When the trace switch on the operation panel is pressed with the frame set as described above, the solenoid 2064 is activated and the center arm 2002 and light arm 200 are activated.
6. Fix the left arm 2009.

In FIG. 9, the roller 2159 of the probe drive unit 2150
is at the reference position O, the pulse motor 2107 is rotated by a predetermined angle, and the rotating base 2105 is rotated to a position where the moving direction of the probe driving section 2150 and the moving direction of the frame presser 2008 or 2011 match.

Next, when the guide portion 2162 of the movable guide plate 2161 is moved to a predetermined position by the solenoid 2164 and the measuring element drive portion 2150 is moved in the direction of the frame presser 2008 or 2011, the roller 2159 moves toward the fixed guide plate 2161.
The probe shaft 2122 moves from the guide section 2160a of the arm 2 to the guide section 2162b of the movable guide plate 2161.
157, and the bevel measuring tip 2125 is kept at the height of the measuring surface.

When the measuring element drive section 2150 further moves, the bevel measuring element 2125 is inserted into the bevel groove of the lens frame, the measuring element section 2120 stops moving at FR, and the measuring element driving section 2150
moves to FRL and stops. Next, pulse motor 21
07 is rotated every predetermined number of unit rotation pulses. At this time, the measuring stylus section 2120 moves on the guide shafts 2010a and 201Ob according to the radius of the lens frame, the amount of movement is read by the potentiometer 2134, and the measuring stylus axis 2122 moves up and down according to the curve of the lens frame. The amount of movement is read by potentiometer 2130. The lens frame shape is (r
, e, z) (n=1.2......N
) is measured as This measurement data (r, e,
The data (x,
Any four points (x,,y,,z,)(X2
, y2. z,)(x.

y, z3) (x, y+, z,) to find the frame curve C2 (the calculation formula is the same as how to find the lens curve).

Also, in Fig. 10, x of (xn, yn, zn),
From the y component (x n, y n), measured point A (xa, ya) has the maximum value in the x direction, measured point B (xb, yb) has the minimum value in the x axis direction, and "l axis direction Select the measurement point C (xc, yc) with the maximum value and the measurement point D (xd, yd) with the minimum value in the y-axis direction, and set the geometric center OF (xF, yF) of the lens frame as from the known frame center
Distance to center of rotation Oo (xo, yo) of 20 and O
o, from the amount of deviation of OF (△X, △y), 1/2 of the distance FPD between the geometric centers of the lens frame is FPD/2 = (L
−ΔX) = (L −(xF −xo ) ) −(2).

Next, calculate the amount of intrusion ■ from the interpupillary distance PD set in the input unit 4 (the following is a margin) ■: FPDPD 2 = (L − (xF − xo ) − PD/2)
... 13) and the position where the optical center of the lens to be processed should be located based on the set upward shift amount U.
(xs, ys) 1 Os (xs, yt) = (xF + I, yF +U)2
・ ・ ・ ・(4) Obtain as follows.

From this Os, (x n, y n) is 0! It is converted into polar coordinates centered on and is the processing data (srnSen)
(n=1, 2..., N) is obtained.

With the apparatus of this embodiment, it is possible to measure the shape of the left and right lens frames, respectively, or it is also possible to use data obtained by measuring the shape of one of the left and right lens frames and inverting the other.

Template shape measurement Next, the operation when measuring a template will be explained.

Pin 2078a of template holder 2077 attached to lid 2073 of template holder 2000B.

2078b is engaged with a hole formed in the template, and fixed to the template holder 2077 with a set screw 2079. In this embodiment, when the lid 2073 is closed, the template holder 2077
Since the center is located on the OR and coincides with the rotation center of the measuring stylus section 2120, the geometric center of the template and the rotation center of the measuring stylus section 2120 coincide.

With the template set as described above, press the trace switch on the input section 4, which will be described later. At this time, rotating base 2
Reference numeral 105 is located at a position where the moving direction of the probe driving section 2150 coincides with the y-axis direction, and the measuring probe driving section 2150 is located at the reference position 0.

When the probe drive section 2150 is moved in the opposite direction to the frame measurement, the pin 21 implanted in the probe section 2120
32 comes into contact with the center arm 2002, and when it moves further, the center arm 2002, the right arm 2006, and the left arm 2009 are pushed apart. The rollers 2159 are connected to the guide portions 2160b to 2160a of the fixed guide plate 2160.
, the measuring head shaft 2122 is pushed up by the arm 2157, and the flange portion 21 of the template measuring roller 2126
26a is maintained at a certain amount above the top surface of the template. After the probe drive unit 2150 moves to FOL, the solenoid 2064 is activated and the center arm 2002. The right arm 2006 and the left arm 2009 are fixed, the movable guide plate 2161 is moved to a predetermined position by the solenoid 2164, and the probe drive unit 2150 is returned to the reference position. At this time, the guide portion 2160 of the fixed guide plate 2160
Since the height of the guide portion 2162a of the movable guide plate 2161 is the same as that of the guide portion 2162a of the movable guide plate 2161, the template measuring roller 2126 moves while maintaining a constant height until it comes into contact with the template. Subsequently, the pulse motor 2107 is rotated every predetermined unit rotation pulse number. At this time, the measuring head part 2120 moves along the guide shaft 2010 according to the radius vector of the template.
a, 201Ob, and the amount of movement is read by a potentiometer 2134. Pulse motor 2
From the rotation angle e of 107 and the reading amount r of potentiometer 2134, the shape of the template is (rn, en) (n-=1.
2. ..., N).

From this measurement data (rn, On), the geometric center O is determined in the same way as in the case of frame measurement, and the FPD from the human power department,
Processed data based on PD, inward amount I, and upward amount U (s rn, s en ) (n=1°2,...
..., N) is obtained.

(c) Unprocessed lens shape measuring section (a) Configuration Figure 11 shows the entire unprocessed lens shape measuring section for detecting the curve value, edge thickness, etc. of the lens after grinding under predetermined conditions. It is a schematic diagram. Its detailed configuration will be explained based on FIGS. 12 to 13.

FIG. 12 is a cross-sectional view of the shape measuring section 5 of the unprocessed lens.
Figure 3 is a plan view.

A shaft 501 is rotatably mounted on a frame 500 by a bearing 502, and a DC motor 503 and photoswitches 504, 5
05. Potentiometers 506 are respectively assembled.

A pulley 507 is rotatably attached to the shaft 501, and a pulley 508. Flanges 509 are respectively assembled.

A sensor plate 510 and a spring 51 are assembled to the pulley 507.

As shown in FIG. 14, a spring 511 is attached to the pulley 508 so as to sandwich a pin 512 therebetween. For this reason,
When the spring 511 rotates with the rotation of the pulley 507, the spring 511 has a spring force that rotates the pin 512 assembled to the rotatable pulley 508,
12 rotates in the direction of the arrow, for example, independently of the spring 511, a force is applied to return the pin 512 to its original position.

A pulley 513 is attached to the rotating shaft of the motor 503, and a belt 5 that is hung between the pulley 507 and the pulley 513 is attached to the rotating shaft of the motor 503.
14, the rotation of the motor 503 is transmitted to the pulley 507.

The rotation of the motor 503 is controlled by photoswitches 504 and 505 by a sensor plate 510 attached to a pulley 507.
is detected and controlled.

As the pulley 507 rotates, the pulley 508 to which the pin 512 is attached rotates, and the lobe 521 that is hung between the rotary shaft of the potentiometer 506 and the pulley 520 is rotated.
The rotation of the pulley 508 is controlled by the potentiometer 50.
Detected at 6. At this time, the shaft 501 and the flange 509 rotate simultaneously with the rotation of the pulley 508. The spring 522 is for keeping the tension of the rope 521 constant.

The feelers 523 and 524 are rotatably attached to a measuring arm 527 by pins 525 and 526, respectively, and the measuring arm 527 is attached to the flange 509.

The initial position and measurement end position of the measurement arm 527 are detected by the photoswitch 504. Also, the photoswitch 50
5 detects the position of 523°524 relief of the feeler and the measurement position with respect to the front refractive surface of the lens and the rear refractive surface of the lens, respectively. The measurement end position by the photoswitch 504 and the position of relief of the rear refractive surface of the lens by the photoswitch 505 match. FIG. 15 is a diagram showing the correspondence between the signals of the photoswitch 504 and photoswitch 505.

As shown in FIG. 16, a shaft 529 on which a microswitch 528 is assembled is disposed on the measurement arm 527, and the shaft 529
9 has a rotatable arm 531 having a rotatable feeler 530, which is held in the direction of the arrow by a spring 532, and which is held in the direction of the arrow by a microswitch 528.
The position of 530 is detected.

The cover 533 prevents grinding water and the like from adhering to the measuring device, and the sealing material 534 prevents grinding water and the like from entering between the cover and the measuring device.

In this embodiment, a third feeler 530 is provided to contact the lens edge, but if the lens is not suitable for processing, the tweeters 523 and 524 will also show abnormal data, so the tweeter 530 may be omitted. is possible.

(b) Measuring method First, the motor 5 controlled by the photoswitch 505
03, and the measurement arm 527 is rotated from the initial position to the position where the front refracting surface of the lens is located, as shown in FIG. 17-1. In addition, in the relief position, when the carriage 700 holding the lens moves in the direction of the arrow, the tweeter 523 and the lens do not interfere, and the tweeter 523 does not interfere with the lens.
30 is placed in a positional relationship such that it comes into contact with the lens edge.

Next, the lens LE moves in the direction of arrow 535.

The amount of movement is controlled by the shape data or distorted shape data of the eyeglass frame to be framed after lens processing. Based on these data, the lens moves in the direction of the arrow.

If the lens size does not deviate from the eyeglass frame shape data or distorted shape data, the tweeter 530 comes into contact with the lens edge and moves in the direction of arrow 535, and the microswitch 528 detects this. When the lens size is out of range, a signal from the microswitch 528 indicates on the display section 3 that grinding is not possible. Micro switch 528
When detecting movement of the tweeter 530, the motor 503 is rotated to bring the tweeter 523 into contact with the front refracting surface in order to measure the shape of the front refracting surface of the lens.

The amount of rotation is determined by taking into consideration the general thickness of the lens and the length of the tweeter 530 in the edge direction, and the lens is rotated to a designed position. This state is shown in FIGS. 17-2 and 17-3.

When the tweeter 523 moves to the position indicated by the two-dot chain line in the figure, the force of the spring 511 attached to the pulley 507 acts to bring the tweeter 523 into contact with the front refracting surface.

Next, move the lens 1 around the chuck shafts 704a and 704b.
When rotated, the lens moves in the direction of arrow 536 according to the shape data or distorted shape data of the eyeglass frame, and the tweeter 523 moves in the direction of arrow 537.
6 to obtain the shape of the front refractive surface of the lens. Also,
At the same time, the microswitch 528 measures whether the lens can be processed into a distorted shape according to the above data and displays this.

After that, the carriage 700 is returned to the initial position, and the motor 5
03 is further rotated to the escape position for measuring the rear refractive surface of the lens, and then the lens is moved to the measurement position.

While rotating the lens once, the amount of movement of the tweeter 524 is measured in the same manner as the measurement of the front refractive surface.

B) Display section and input section FIG. 18 is an external view of the display section 3 and input section 4 of this embodiment, both of which are integrally formed.

The input section of this embodiment consists of various sheet switches, including a main switch 400 that controls power on/off;
It consists of a setting switch group 401 for inputting various processing information and an operation switch group 410 for instructing how to operate the apparatus.

The setting switch group 401 includes a lens switch 402 that indicates whether the material of the lens to be processed is plastic or glass;
A frame switch 403 that indicates whether the frame material is cell or metal, a mode switch 404 that selects the processing mode between manual processing or bevel processing, and an R/L switch 405 that selects whether the lens to be processed is for the left eye or the right eye. , a far/near switch 406 that performs distance/near conversion of the lens optical center upper/lower position and PD value, an input changeover switch 407 that selects an item to change setting data, and an item selected by the input changeover switch 407. Increase/decrease data + switch 408
and -switch 409 are arranged.

The operation switch group 410 includes a start switch 411,
Pause switch 412 for temporary stop, which also serves as a screen changeover switch to bevel simulation display, switch 413 for opening and closing the lens chuck, and switch 4 for opening and closing the cover.
14. Double printing switch 415 for finishing printing twice, trace switch 4 for instructing lens frame and template tracing
16, there is a next data switch 417 for transferring the data measured by the lens frame and template shape measuring section 2.

The display unit 3 is composed of a liquid crystal display, and displays setting values for processing information, bevel simulation for simulating the bevel position and the fitting state between the bevel and the lens frame, reference setting values, etc. under the control of the main calculation control circuit, which will be described later. indicate.

FIG. 19 is an example of a display screen, FIG. 19-1 is a screen for setting lens processing information, and FIG. 19-2 is a simulation screen of the positional relationship between the lens and the beveling grindstone. In addition to the positional relationship simulation screen shown in Figure 19-2, there is also the one shown in Figure 19-3, which shows the positions of the bevel apex, bevel hem, and edge in a straight line to make it easier to see, and the bevel apex, It is also possible to adopt the one shown in Fig. 19-4 in which the positions of the hem and edge are displayed up to the vicinity of the measurement position. These display methods may be selectively switched as necessary.

(3) Electrical control system of the entire device The electric control system of this embodiment having the mechanical configuration as described above will be explained.

FIG. 20 is a block diagram of the electrical system of the entire device.

The main arithmetic control circuit is composed of, for example, a microprocessor, and is controlled by a sequence program stored in the main program. The main calculation control circuit can exchange data with the IC card, optometry system equipment, etc. via the serial communication board, and can also exchange data and communicate with the tracer calculation control circuit of the lens frame and template shape measuring section. conduct.

The main calculation control circuit includes a display section 3. An input section 4 and an audio playback device are connected.

In addition, photo-switch units such as photo-switches 504 and 505 for measurement, a machining end photo-switch for detecting the machining completion state, and micro-switch units for opening/closing the cover, machining pressure, and lens chuck are also connected to the main processing control circuit. has been done.

Potentiometer 506 that measures the shape of the lens to be processed
is connected to an A/D converter, and the converted result is input to the main arithmetic control circuit. Lens measurement data processed by the main arithmetic control circuit is stored in a lens/frame data memory.

Carriage movement motor 714. Carriage up and down motor 7
28. The lens rotation axis motor 721 is connected to the main arithmetic circuit via a pulse motor driver and a pulse generator. The pulse generator is a device that receives commands from the main processing circuit and controls how many pulses are output at what Hz cycle to each pulse motor, that is, the operation of each motor.

Processing pressure motor 733. The lens measurement motor 503 and each motor for opening and closing the cover are driven by a drive circuit that receives commands from the main arithmetic and control circuit.

The grindstone motor 65 and the water supply pump motor are driven by an AC power source, and their rotation and stop are controlled by a switch circuit controlled by commands from the main arithmetic control circuit.

Next, the lens frame and template shape measuring section will be explained.

Potentiometer 21 for measuring the shape of the lens frame/template
30.2134 and the output of a potentiometer 2046 for measuring the rim thickness of the frame are connected to an A/D converter, and the converted results are input to the tracer calculation control circuit. Each microswitch unit, such as a microswitch for frame confirmation, is also connected to the tracer calculation control circuit.

The tracer rotation motor 2107 is controlled by a tracer calculation control circuit via a pulse motor driver. Also, tracer movement motor 2152. Frame fixed solenoid 2064. The probe fixing solenoid 2164 is driven by each drive circuit that receives commands from the tracer calculation control circuit.

The tracer calculation control circuit is composed of, for example, a microprocessor, and is controlled by a sequence program stored in a program memory.

Furthermore, the measured shape data of the lens frame and template are temporarily stored in a trace data memory and transferred to the main arithmetic and control circuit.

(Space below) (4) Operation of the entire apparatus Next, the operation of the lens grinding apparatus will be explained based on the flowchart of FIG. 21.

Step 1-1 After turning on the main switch 400 in FIG. 21, first set the frame or template on the frame or template holder, and use the trace switch 416 to trace.

Step 1-2 Input the patient's PD value and astigmatism axis. In the case of template measurement, the FPD value is also input. In addition, the distance changeover switch 4
06 sets whether the input PD is far or near. The setting status is displayed on the display of the display unit 3. After inputting the far PD with the distance set to far, if the distance is changed to near using the far/near switch 406, the PD is converted to the near by the following equation.

is the required working distance, 12 is the distance between the Japanese corneal vertices, and 13 is the distance between the corneal apex and the rotation point.

When near PD is input in the near state and then changed to far, it is converted to far PD using the following formula.

Details of the conversion are described in Japanese Patent Laid-Open No. 82621/1983.

Further, the upper and lower layouts are also set to values manually set in advance in the reference value setting described above for each of the near and far areas. If you want to make changes to that value, click (
+) switch 408. It can be changed using the (-) switch 409. At this time, the FD can also be changed.

Step 1-3 Using the radial information and FPD value of the frame or template obtained in Step 1-1 and the information on the PD top and bottom layout input in the previous step, coordinates are transformed to a new coordinate center using the method described above, and a new Radial information (tsen, tsen)
is obtained and stored in the frame data memory.

Step 1-4 The operator determines the material of the lens to be processed, and selects whether it is a glass lens or a plastic lens using the lens selection switch 40.
2, whether the frame is metal or cell, the frame changeover switch 403 selects whether it is a processed lens, right eye or left eye.
Using the L changeover switch 405, manual processing or bevel processing is input using the mode switch 404. Based on the setting values entered in advance in the standard value setting for each of the 8 types of combinations depending on whether the lens is plastic or glass, the frame is cell or metal, and the mode is beveled or flat.
Set the lens processing size.

If you want to change the setting value, press the (+) switch 40.
8. It can be changed using the (-) switch 409. If the R/L designation of the processed lens is the same as the measurement side at the time of frame measurement, the data is used as is, but if it is different, the data is reversed left and right and used.

The lens is chucked by rotating the motor 706 using the switch 413 for opening and closing the lens chuck. At this time, if the lens has a directional property such as an astigmatic axis, it is chucked with the axial direction facing the center of rotation of the grindstone.

Step 1-6. Step 1-7 If there is no abnormality in the above steps, start switch 41
Press 1 to start.

When confirming that the start switch 411 is pressed, the main arithmetic and control circuit performs processing correction (grinding wheel diameter correction).

Here, point a is the center of rotation of the grinding wheel, point b is the center of lens processing, and R
is the radius of the grindstone, LE is the frame data, and L is the distance between the center of rotation of the grindstone and the center of lens processing. Here, the radial information (
IIδn, tsen) is read from the frame pig memory and the following calculation is performed.

L=+sδncos rsen+ −(+5Jnsin
tsen ) (n=1.2.3...N) When the astigmatic axis is other than 180°, tsen is offset by the difference, and rsθ'n is used instead of tsen.

Next, the radius vector information (rsδn, +sθn) is rotated around the processing center by a small arbitrary angle, and the same calculation as in the previous equation is performed.

The rotation angle of this coordinate is ξ+ (+ =1,2+3・
...N) and sequentially rotate 360 degrees from Li to ξn. Let Lll be the maximum value of L at each Li, and +Sθn at that time be Ol. Also (Li ξ1(9i)(i
=1.2.3...N) as processing correction information and stored in the frame data memory.

Step 2-1 If the designation in step 1-4 is beveling mode, the process proceeds to step 2-2, and if the designation is manual processing mode, the process proceeds to step 3-1.

Step 2-2 When the beveling mode is specified, the main processing control circuit rotates the lens rotation axis motor 721 via the pulse generator and pulse motor driver so that rsθn faces six directions during the rotation of the grindstone. The lens shafts 704a and 704b are rotated.

Next, the carriage is rotated by the motor 714 in the same manner,
After moving the carriage to the measurement reference position at the left end of the carriage stroke, the motor 728 is rotated to change L to a measurable position.

Thereafter, the lens edge position on the line of vector radius information is measured using the aforementioned unprocessed lens shape measuring mechanism. The arbitrarily determined front edge position of the lens is rZn, and the rear edge position of the lens is lZ.
Let it be n. This is converted into edge information (Zn, rZn) (n=1.
2, 3.4) and store it in the frame data memory.

At this time, this edge information may be any four points that are intermittently measured.

If it is determined that there is a part where the outer diameter of the lens is smaller than the distorted diameter, it is determined that a lens with the desired lens frame shape cannot be obtained, and a warning is displayed on the display and execution of subsequent steps is canceled. do.

Step 2-3 Find the front curve and the rear curve from the edge information (IZn, rZn) obtained in Step 2-2.

First, the radial information (+sδn, +sθn) is converted into orthogonal coordinates (Xn
, Yn). Any four points (X,.

”r), (X2.Y2), (Xj, Y3) (X
4゜Y4) respectively Nokoba information (l Zt, I Zt
).

(I 22. I Z2), (I ZJ, I Z,)
, (IZ4.l Z,), first find the front curve and its center.

Here, (a, b, c) represent the center coordinates of the curve, and R represents the radius of the curve.

a=D+/Db-D, =/Dc=D3/D (blank below) Next, all lZ is replaced with rZ to find the rear surface curve and its center. The bevel curve is determined based on this information and the curve of the eyeglass frame.

If the setting of the bevel carp is in the manual forced mode, proceed to step 4-1.

The bevel curve is the curve drawn by the apex of the V-groove on the outer periphery that is processed to fit the lens frame.Generally, a curve that follows the front curve is desirable, but if the bevel curve is too steep,
If it is too loose, it will be difficult to fit it into the frame. Therefore, when the front surface curve value is within a predetermined width, the bevel curve forms the same curve as the front surface curve, but the position of the bevel apex is shifted to the rear by a certain amount from the edge position of the front surface of the lens. The center of the curve is placed on the line connecting the center of the front curve and the center of the rear curve.

(Left below) If the bevel curve exceeds a certain width, the edge information (lZ
n, rZn), lZn+ (rZn-IZn)R/10=yZn to y
Find Zn. At this time, if R=4, the edge thickness is 426
It is equivalent to standing at the ratio of .

If it is possible to curve along the front curve, the data is set as (rsθn, 71Zn), and if it is not possible, the data obtained with R=4 is set as (rsθn).

7 Zn) as temporary bevel data.

In either case, it is compared whether the temporary bevel data falls within a certain range with respect to the frame curve of the frame, and the data is corrected so that it falls within this range.

When the edge is thick, it may not be necessary to maintain the ratio along the front curve of the lens. In this case, the bevel data follows the frame curve.

Step 2-4 Display the bevel shape obtained in the above step on the display section 3.

Radial information (rsδn, rfθn) is displayed on the display.
A frame shape is displayed, and a cursor 30 rotating around the processing center is further displayed. The beveling grindstone shape 32-2 is superimposed on the cross-sectional shape 32-1 before lens finishing at the position where the cursor and the frame shape are in contact and displayed on the left side of the panel. The cursor rotates in the open direction when the (+) switch is pressed, and in the slow direction when the (-) switch is pressed, and the cursor always rotates in the positional relationship between the cross-sectional shape 32-1 before lens finishing at that position and the beveling grindstone. indicate.

When the rotation cursor is at the position indicated by the rim thickness measurement position mark 31, a rim position mark 33 is displayed at the lower left of the positional relationship between the cross-sectional shape 32-1 before lens finishing and the beveling grindstone.

The bevel is positioned so that the front surface of the lens has a certain relationship with the front surface of the rim based on the measured rim thickness.

Step 2-5.2-6 If there is no problem after checking the bevel curve, start the process again using the start switch 400 to start machining.

If the lens is made of plastic according to the settings in step 1-4, use the plastic rough grindstone 60c.

If it is glass, the carriage 714 is moved by a motor (hereinafter referred to as a margin) so that the lens to be processed is placed on the rough grindstone 60a for glass.

After rotating the grindstone, the motor moves it until the distance between the center of rotation of the grindstone and the center of lens processing is within the processing correction information (Li, Li, Oi) read from the frame data memory. At that time, wait for the machining end photo switch 727 to be turned on, rotate the angle to ξ, and at the same time turn L to L.
Move it to 2.

Continuously perform the above operations (Li, ξ1) (i=12.
3... Carry out based on N). As a result, the lens is processed into the shape of the radius vector information (+sδn, rsθn).

Step 2-7.2-8.2-9 After the lens is removed from the grindstone by the motor 728, the lens is moved onto the bevel grindstone by the carriage moving motor 714.

Next, processing correction information (Li, Li, Hi) and bevel data (rsδn, rsθn) or (rsθn, 7
The beveling data YZi is obtained by converting the beveling data YZi from the kZn).

First, convert rsθn such that 1=rsθn to 1=1゜2
．． 3...Find in the order of N. rsθn at that time
The bevel positions ylZn or ykZn for each are sequentially selected, converted into the form of bevel processing information (Liξ1Zi) as Zi, and then stored in the frame data memory again.

Based on this information, the motor 728 sets Li, the motor 721 sets Li, and the motor 714 sets Zi at i=1.
．． 2.3 Processing is performed while controlling simultaneously in the order of N.

Step 3-1 When the grinding mode is flat grinding mode, according to the settings in step 1-4, if the lens is made of plastic, the lens to be processed is placed on the rough grindstone 60a for plastic, and on the rough grindstone 60a for glass, if it is glass. The carriage is moved to the moss 714. After rotating the grindstone, the motor 728 moves the distance between the center of rotation of the grindstone and the center of lens processing to Li in the processing correction information (Liξiθi) read from the frame data memory. At that time, wait until the machining end photo switch 727 is turned on, rotate the angle to ξ, and at the same time move L to L. Continuously perform the above operations (Liξ1) (i=1.2.3.
・・・・・・Conducted based on N).

As a result, the lens receives radial information (rsδn, rsθn
) is processed into the shape.

Step 3-2.3-3 After the lens is removed from the grindstone by the motor 728, the lens LE is moved onto the flat part of the bevel grindstone 60c by the carriage moving motor 714. Here step 2
- Finish the outer periphery of the lens LE by the same method as below.

Step 4-1 In manual forced mode, select one of the following three methods to specify the bevel curve.

(b) Specify the bevel position for each edge for any four points on the regular form.

(b) Specify the bevel position and the curve value r of the bevel curve for each edge for any three points on the regular form.

(c) For any one point on the regular form, specify the bevel position and bevel curve value r for that edge. At this time, the center point of the bevel curve is assumed to be on a line connecting the center point of the lens front curve and the center point of the boxing system on the front surface of the lens.

On the other hand, in order to set the bevel position at a specified point, if the shape of the edge is not accurately displayed, problems will occur due to the lens curve and the inclination of the bevel grinding wheel, especially in areas where the edge thickness is thin.

Therefore, at designated points such as those shown in No. 22-11ffl, the position of point 01 on the front surface of the lens, point E on the rear surface of the lens is measured. This is step 2-3 for the front of the lens.
The slope of the edge is determined using the calculated value of the lens curve obtained in step 2, but since there is a possibility that there is a trick surface on the rear surface, two points are measured.

In FIG. 22-1, the distance Δ2 between AB can be determined by the following equation as shown in FIG.

The radius of the front curve is R1 The coordinates of point A are (x, y.

Z), point B17) coordinates are (X', Y', Z'), and the coordinates of the center point of all 111-p are (a, b, c),
Sphere Equation % Formula % From this value of Δ2, the straight line BC shown in FIG. 22-2 can be approximately determined.

For the rear surface, since we want to find point 01 and point E, the straight line DE
is approximated by the straight line EF in FIG. 22-2.

Further, the edge thickness is determined from measurement data from point A1.

Through the above calculations, a realistic cross-section display as shown in FIG. 22-2 can be made.

At this time, the bevel position can be freely set by moving the bevel YA on the straight line BE.

Step 4-2 In this step, (a), (b), or (c) selected in step 4-1 is calculated.

In the case of (a) The method used in step 2-3 is similarly used.

In other words, the center of the curve (a,
b, c), radius r, find the point (X).

y, z), then apply (X-a) + (Y-b) + (Z-c) = r, and each point (Xn, Yn) on the distorted shape (n=1°2.
3. ..., N) is determined and data for bevel processing is created.

In the case of (b), the bevel positions are specified for three points on the arbitrary distortion pattern, so in a straight line that passes through the center of the circle that includes these three points and is perpendicular to the plane that includes this circle The distance from the three points is the value 523/Cr set by the curve value Crv.
The point where v (mm) is used as the center of the bevel curve.

Data for bevel processing is created using this center point and the method described in (a) above.

In the case of (c), the center point of the front curve of the lens is (X□, y2゜z2),
Let the radius be r and the point on the front surface in the boxing system be (X, yl, zl), then the center coordinates (a, b, c) of the sphere passing through za) are z - z.

Z + Z Yu is required. Here, X is the layout amount in the X-axis direction (horizontal direction), and y is the layout amount in the Y-axis direction (vertical direction).

The center is on the line connecting these two points, and the bevel curve value Cr
Radius set by v = 523 / Crv (
Bevel setting position ((X,,V.

Then a= (I, -xλ) (x, -x2)Z r
Z2 b= (y, -y,) (!, -!,)+X2 +y2 z, -z.

Data for bevel processing is created using this center point and the method described in (a) above.

After creating this data for bevel processing, the process proceeds to step 2-5.

It goes without saying that this explanation is based on the principle of operation, and that various changes can be made depending on the degree of automation.

Although one embodiment of the present invention has been described above, it is obvious to those skilled in the art that the embodiment can be easily modified based on the same technical idea as the present invention, and these are also encompassed by the present invention. Needless to say.

[Effects of the Invention] According to the present invention, the positional relationship between the lens and the beveling grinding wheel can be realistically displayed, including the lens cutting allowance, before beveling the eyeglass lens, so beveling can be performed more accurately and easily. I can do it.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the overall configuration of a lens grinding device according to the present invention, FIG. 2 is a cross-sectional view of the carriage, and FIG. is B-
B sectional view, FIG. 4 is a diagram explaining the principle of the device, FIG. 5 is a perspective view showing the lens frame and template shape measuring section according to the present example, and FIG. 6-1 shows the frame holding section 200OA. figure,
Figure 6-2 is a detailed view of the holding part, Figure 6-3 is a diagram explaining the lens holding mechanism, Figure 6-4 is a view of a part of the housing 2001 seen from the back, and Figure 6-5. The figure is a diagram for explaining the rim thickness measuring mechanism, and FIG. 6-6 is a diagram for explaining the frame fixing mechanism. Fig. 7-1 is a plan view of the measuring section, Fig. 7-2 is a cross-sectional view along C-C, Fig. 7-3 is a cross-sectional view along D-D, and Fig. 7-4 is a cross-sectional view along E-E. . Figures 8-1 and 8-2 are diagrams showing the measurement method, Figures 9-1 and 9-2 are diagrams explaining the movement of the probe in the vertical direction, and Figure 10 is a diagram explaining coordinate transformation. This is a diagram. FIG. 11 is a schematic diagram of the entire shape measuring section of an unprocessed lens, FIG. 12 is a sectional view of the shape measuring section of the unprocessed lens, and FIG. 13 is a plan view of the shape measuring section of the unprocessed lens. FIG. 15 is a diagram showing the correspondence between each signal of the photoswitch 504 and the photoswitch 505, FIG. 16 is a diagram for measuring the lens vector radius, FIGS. 17-1, 17-2, and 1.
FIG. 7-3 is a diagram illustrating the measurement operation of the measurement section. 1st
Figure 8 is an external view of the display unit and input unit of this embodiment, Figure 19 is an example of a display screen, Figure 19-1 is a screen for setting lens processing information, and Figure 19-2 is a bevel display. This is a simulation screen. Also, Figures 19-3 and 19-4
The figure shows another example of the bevel simulation screen. FIG. 20 is a block diagram of the electrical system of the entire device. FIG. 21 is a flowchart explaining the operation of the device. 22nd
Figure-1 is a partial cross-sectional view of the lens end face, Figure 22-2 is a diagram showing the screen display in manual forced mode, and Figure 22-2 is a diagram showing the screen display in manual forced mode.
FIG. 3 is a diagram showing a calculation method for displaying the screen. 2...Lens frame and template shape measuring device 3...Display section 4...Manpower section 5...Lens shape measuring device 6...Lens grinding section 7...Carriage part O-co No. 6- 2 Figure 6-5 Figure 6-6 Figure 6-3 Figure 17-1 Figure 7-2 Figure 7-3 Figure $+q-3 Figure 1'7-4 Figure 4 Engraving of Senshi's drawing (No change in content) Figure 22-2 Yadenkaroe Ishiji Ishijiru Maki Proceedings Amendment (Method) MuZ 1゜2゜3゜Indication of Incident 1990 Patent Application No. 67698 Name of Invention Eyeglass Frame Tracing Device Patent applicant address 8443 Gamagoori Sakae 7-9 Sakaemachi, Gamagori City, Aichi Prefecture 0533-6 Fu 6611 5. Column for the name of the invention in the application to be amended. and Drawing 6, contents of amendments (1) The name of the invention in the application is corrected as "Eyeglass lens grinding machine with eyeglass frame tracing device." (2) The notation "Figure 22" in the drawing is deleted, “22nd-
"Figure 1" and "Figure 22-2" are as shown in the attached sheet (there are no changes to the contents). that's all

Claims (1)

[Claims] (1) In a bevel machine that performs bevel processing when processing eyeglass lenses, the shape around the edge of the eyeglass lens is measured before bevel processing, and the positional relationship between the unprocessed eyeglass lens and the beveling grindstone in the processing state is determined. An eyeglass lens grinding machine having an eyeglass frame tracing device, characterized in that it is provided with a display means for visual representation.