JPH0320602A - Spectacle-frame tracing apparatus and spectacle-lens grinding machine having said apparatus - Google Patents

Abstract

PURPOSE:To make it possible to measure the thickness of the rim of a spectacle frame and to determine the position of a ridge live in consideration of the thickness data of the rim of the spectacle frame by providing a rim-thickness measuring means for measuring the distance between the front edge of the rim of the spectacle frame and the center of a lens-coupling V groove. CONSTITUTION:A lens-shape measuring device 5 for measuring the virtual edge thickness and the like of a lens that is not (machined) is provided at the front part of this apparatus. A grinding wheel 60 comprising a coarse grinding wheel 60a for a glass lens, a coarse grinding wheel 60b for plastic, and grinding wheel 60c for a ridge live and planar maching is attached to a lens grinding part 6. When a motor 65 is rotated, the grinding wheel 60 is rotated. Furthermore, at an intermediate plate 710, a rack is intermeshed with a pinion 715 which is attached to a motor 714. The motor 714 is fixed to a base 1 in parallel with a shaft 701. In this way, the motor 714 moves a carriage in the axial direction of the shaft 701. A sensor is provided at the intermediate plate 710. The contact state between a stopper and a correcting block is confirmed, and the ground state of the lens can be found.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an eyeglass frame tracing device for measuring the lens shape of an eyeglass frame, and an eyeglass lens grinding machine having the same.
lJ).

[Prior art and its problems] Conventional eyeglass frame tracing devices and eyeglass lens grinding machines using the same measure only the radius vector information of the lens shape, but do not measure the rim thickness of the eyeglass frame. .

Therefore, when determining the bevel position in the edge thickness direction at the peripheral edge of the lens, the fabricator should: ■ specify a position at a certain ratio to the edge thickness, or ■ specify the bevel position dimension in the edge thickness direction, etc. Much depended on the experience and intuition of the processor.

In addition, the poor fit between the lens and eyeglass frame could not be confirmed until the lens was actually put into the eyeglass frame after bevelling, which sometimes caused problems with the fit between the eyeglass frame and the lens. .

Modern eyeglass frames come in a variety of rim thicknesses, and this problem poses a major obstacle in automating the Shichidamazuri machine.

SUMMARY OF THE INVENTION In view of the above-mentioned problems of the prior art, an object of the present invention is to measure the rim thickness of an eyeglass frame, and determine the position of the eyeglass frame to best fit the eyeglass frame by taking into account the rim thickness information of the eyeglass frame. An object of the present invention is to provide an eyeglass frame tracing device and an eyeglass lens grinding/cutting machine having the same.

[Structure of the Invention] In order to achieve the above object, the present invention provides an eyeglass frame tracing device for measuring the lens shape directly from the eyeglass frame. The feature is that a rim thickness measuring means is provided to measure the distance between the rims (at a predetermined location or circumference).

Further, the above-mentioned rim thickness measuring means includes a groove position measuring means for measuring the position of the lens insertion V groove, and a rim leading edge measuring means for measuring the rim front edge of the eyeglass frame, and the V groove position measuring means The rim thickness is calculated from the measurement results of both the rim leading edge measuring means and the rim leading edge measuring means.

The V-groove position measuring means is characterized in that it is a mechanism that measures the vertical deviation of a measuring element that measures radius vector information of the lens shape.

Furthermore, in an eyeglass lens grinding machine having means for measuring a virtual edge thickness before grinding an unprocessed lens, a rim thickness measuring means for measuring the distance between the center of the rim front edge of the eyeglass frame and the lens insertion V groove. The virtual bevel position determined based on the measurement result of the virtual edge thickness measuring means is compared with the measurement result measured by the eyeglass frame tracing device, and the lens after grinding is compared with the measurement result measured by the eyeglass frame tracing device. It is characterized by having means for displaying in advance the fitting state with the eyeglass frame.

Further, the means and number for displaying in advance the fitting condition between the lens and the eyeglass frame after the grinding process are characterized in that the fitting condition is graphically displayed.

[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 various parts constituting the lens grinding device are arranged.

2 is a lens frame and template shape measuring device which is built into 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.

At the front of the device, there is a lens shape measuring device 5 for measuring the virtual edge thickness of an uncut lens.

Reference numeral 6 denotes a lens grinding section, in which a certain grindstone 60 consisting of a rough grindstone 60a for glass lenses, a rough grindstone 560b for plastic sticks, and a grindstone 60G for bevel and flat processing is rotatably attached to a rotating shaft 61. The rotating shaft 61 has a band 62 on the base 1.
It 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) 4-stroke moving frame 1E (a) Carriage portion The structure thereof 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 from arrow A showing the drive mechanism of the carriage, and Fig. 3-b is a sectional view taken along line B-8.

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

The carriage shaft 702 has tie pulleys 703a, 703b, and 703G each having the same number of teeth at the left end.
At the right end, it is stuck between them.

Lens rotation axes 704a and 704b are coaxially and rotatably supported on the carriage 700 in parallel with the shaft 701 and at an unchanging distance. The lens rotation axis 704b is the rack 7
05, the rough rack 705 is movable in the axial direction, and is rotated by a pinion 707 fixed to the rotating shaft of a motor 706. The lens LE can be moved in the direction of the lens rotation axis 704a, 70.
4b. Note that the lens rotation axes 704a, 70
4b has a boob 708a, 708b with the same number of teeth, respectively.
are installed and they are timing belt 70
Pool 703C.9a, 709b. It is connected to 703b.

An intermediate plate 710 is rotatably fixed to the left side of the carriage 700. The intermediate plate 710 has a cam follower 71]
are attached, which sandwich a guide shaft 712 fixed to the base 1 in a position parallel to the shaft 701. The intermediate plate 710 has a rack 7 ] 3 with a shaft 7
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 motor 714. 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, there is a pulley 7 having the same number of teeth as the boules 708a and 708b.
18, and the pulley 718 is connected to the pulley 703a by a timing belt 719.

A gear 720 is provided at the right end of the rotating shaft 7]7,
The gear 720 meshes with a gear attached to a motor 721. When the motor 721 rotates, the pulley 718 is rotated by the gear 720, and the carriage shaft 702 is rotated via the timing belt 719, thereby rotating the bobbies 703b, 703G and the timing belts 709a, 70.
9b, lens chuck shafts 704a, 704t) are rotated via pulleys 708a, 708b.

The block 722 is fixed to the drive plate 716 coaxially and rotatably with the rotating shaft 7 , 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 movable with the block 722 and the correction block 724 through holes made therein. A stopper 726 is fixed to the round rack 725 and can only be moved below the contact position of the correction block 724.

A sensor 727 is provided on the intermediate plate 710, and a sensor 727 is provided on the intermediate plate 710.
26 and the correction block 724 can be checked, and the grinding state of the lens can be known.

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 T' between the axes can be controlled by the motor 728.

Roughly speaking, this 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 axis 7048.704b and the shaft 701 is β, and the lens chuck axis 7
The distance between the shafts 04a, 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 shaft 711
Let α be the center-to-axis (C-D) distance, β′ be the axis-opening (C-E) distance between the rotating shaft 717 and the shaft 701, and let θ be the angle between α′ and β1.

The positional relationship is schematically shown in FIG.

α, α', β, and β remain unchanged, and roughly speaking, the center of rotation of the grinding wheel and the center points of the shafts 701 and 723 remain unchanged on the plane of the figure, and the lens chuck axes 704a and 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 θ1θ1, α1/α=β′/β, then
ΔABC and ΔEDC have similar shapes.

In this case, α'/α-γ''/7, and T' 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 bobbin 718 rotates the lens shafts 704a and 704b at a constant speed as described below.

When γ1 and γ are changed by the motor 728 while rotating the pulley 718, the rotation angle of the pulley 718 with line segment ED as the reference line and the rotation angle of the lens axis with line segment 8B as the reference line. is equal to Further, there is also a linear correlation between the rotations of the motor 721 and the lens shafts 704a and 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 axis 70 with line segment AB as the reference line changes.
4a. 704b rotates in a linear correlation with the rotation angle of the output shaft of motor 721(7).

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.

(Opening) Lens frame and template shape measuring section (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 mainly consists 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.

In FIG. 6-1 showing the 2k2△rioku frame holding part 200OA,
The approximate geometric center point of the lens frame when the eyeglass frame is set in the frame holding part 200OA is the reference point OR,0
1, and the straight line passing through these two points is the reference line.

The frame holding unit 200OA has a housing 2001. The center arm 2002 can be moved on guide shafts 2003a and 2003b attached to the surface of the housing 2001! ! At the tip of the center arm 2002, there are frame stampings 2004 and 2 at the same interval as the OR and OL.
There is 005.

Similarly, the light arm 2006 is connected to the guide shaft 200
7a and 2007b, a left arm 2009 is mounted movably on guide shafts 2010a and 2010b, respectively, and a frame press 20O8 is mounted at the tip of the right arm 2006, and a left arm 2009 is mounted on the guide shafts 2010a and 2010b, respectively.
9 A frame support 2011 is rotatably supported at the end of the sear.

Center arm 2002 has frame press 2004, 20
05 passes through OR and OL, in a direction perpendicular to the reference line, and the light arm 2006 passes through the frame press 20
0'8 passes through the OR, and the left arm 2009 slides in a direction inclined approximately 30'' from the reference line so that the frame press 2011 passes through the OL.

In Figure 6-2, frame pressing 2004, 2005
, 2008, and 2011 are two slopes that intersect with each other (2012a.20'l2b) and (2014a, 2
014b), (2016a, 201 6a), (201
8a. 2018b), and the ridge lines 2013, 2015, 2017, and 2019 created by each of the two slopes are on the same plane (measurement plane), and the frame stampings 2008, 20
The axis of rotation 11 is also located on this measuring plane.

Further, a semicircular frame pusher 2020 is mounted on the center arm 2002 so as to be movable above the guide shafts 2021a, 2021b attached to the center arm 2002. Spring 2 so that it always pulls the workpiece 2020 towards the center arm side.
One end of 022 is hung on a pin 2023a implanted in the center arm 2002, and the other end is hung on the frame press 2020.
It is hung on a pin 2023b planted in.

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

Pulleys 2024a and 2024 are provided on the back side of the housing 2001.
b, 2024c. 2024d is rotatably supported, wires 2025 are hung on the boleys 2024a to 2024d, and holes 2028a, 202 of the housing 2001
Center arm 200 protrudes from the back through 9a
Pin 2026a and light arm 200 implanted in 2
It is fixed to a pin 2027 implanted in 6.

Similarly, behind the housing 2001, pulleys 2030a and 2
030b, 2030c, and 2030d are rotatably supported, and the wires 2030a to 2030d are
031 is hung, and the hole 202/8 of the housing 2001
b, 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.
Constant torque spring 203 that always pulls in the OR and OL directions
3 is attached to a drum 2034 rotatably supported on the back surface of the housing 2001, and a constant torque spring 203
One end of 3 is the pin 2 implanted in the center arm 2002.
It is stuck to 035.

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 side 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 plastic plate 2042 is fixed to the rotating shaft 2041 of the frame press 2011, and the frame press 201
A boley 20 rotates integrally with the rotating shaft 2041 and rotates independently of the rotation of the frame press 2011.
43 is pivotally supported, and a rim thickness setting pin 2044 is implanted in the boley 2043.

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 booley 2047 is attached to the other end. A wire 2049 is attached to the pulley 2042 and the boley 2047, and both ends of the wire 2049 are fixed to each boley, and the botension meter 2046 and the frame pusher 2011 are always linked and rotated in the same direction.

In FIG. 6-5, one end of the wire 2050 is fixed to the pulley 2043, the wire 2050 is fixed to the pulley 2048 in the middle, and the other end is connected to the left arm 200 through the spring 2051.
The shaft of the botension meter 2046 rotates in accordance with the movement of the rim thickness 81 fixing 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. From this data on the front surface of the rim and data on the vertical direction of the groove, it is possible to measure the rim thickness around the entire circumference of the lens frame.

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

Further, one end of a 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 brake rubber 2062 is normally pushed in a direction where it does not come into contact with the center arm 2002. The work board 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 the center arm 2002 (the right arm 2006 and the left arm 2009 are fixed).

! In FIG. 5 and FIG. 6-1, the return template holding part 2000B is connected to the supports 2071a and 2071 installed in the casing 2001.
b, 2071c, and 2071d.

The substrate 2072 is fixed to the supports 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 placed in the center of the window 2076.
Iil it. Pin 20 is attached to the template holder 2077.
78a. 2078b is implanted, and the holes and pins 2078a. 2078b and fix the template to the template holder 2077 with set screws 2079.

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

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

FIG. 7 is a plan view of the measuring section, and FIG. 7-1 is a cross-sectional view taken along the line CC.

The movable base 2101 has shaft holes 2102a, 2102.
b, 2102c, and are supported so as to be movable by shafts 2103a, 2'l03bk:) attached to the housing 2001. In addition, a lever 2104 is installed in the movable base 2101, and by moving the movable base 2101 with this lever 2104, the rotation center of the rotary base 2105 is aligned with the OR on the frame and the template holder 2000. , move to the OL position. The movable base 2101 has a rotary base on which a booley 2106 is formed.
A base 2105 is rotatably supported. Pulley-21
06 and a booley 2108 attached to the rotating shaft of the pulse motor 2107 attached to the movable base 2101.
A belt 2109 is stretched between the two and the rotation base 2105 transmits the rotation of the pulse motor 2107 to the rotation 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 attached to the probe 2110b so as to be movable. The measuring head part 2120 has a shaft hole 2 in the vertical direction.
121 is formed, and the probe shaft 2] 22 is inserted into this shaft hole 2121.

A ball bearing 2123 is interposed between the gauge head shaft 2122 and the shaft hole 2121 (this allows the gauge head shaft 21
The vertical movement and rotation of 22 are made smooth. An arm 2124 is attached to the upper end of the measuring tip shaft 2122, and a bevel measuring tip 2125 in the shape of a bead that comes into contact with the bevel groove of the lens frame is attached to the top of this arm 2124.
is rotatably supported.

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 gauge head shaft 2122, a pin 2128 is implanted in a ring 2127 that is rotatably attached to the gauge head shaft 2122, and movement of the pin 2128 in the rotational direction is controlled by a ring 2127 formed in the gauge head part 2120. It is restricted by a long 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 2]22.

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 are 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 rotation base 2105. Booley 2136a, 2 is attached to the rotating base 2105.
136b is rotatably supported, and a wire 2137 fixed to a pin 2133 connects to the boleys 2136a, 2.
136b and is fixed to a 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 of the measuring head part 2120k: the implanted pin 214
It is stuck to 2.

Rail 21'IOC. on rotating base 2105. 2110
A probe drive unit 2150 is slidably attached on the probe d. 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. The rotary base 2105 has a booley 2154a,
2154b is rotatably supported on the shaft, and the pin 2151
The wire 2155 fixed to the booley 2154a,
2154bklml! } and is fixed to booley 2153. As a result, the rotation of the motor is transmitted to the probe drive section 2150.

The gauge head drive unit 2] 50 is the gauge head unit 2 that is pulled toward the gauge head drive unit 2150 by the constant torque spring 2140.
120, and by moving the probe drive section 2150, the probe section 2120 can be moved to a predetermined position.

The probe drive unit 2150 also includes a probe shaft 21 at one end.
A shaft 2156 includes 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. Of the solenoid 2164 attached to the rotating base 2105! One end of the Xilin shaft is a movable guide plate 216
It is attached to 1. One end of the spring 2165 is hung on the rotating base 2105, and the other end is hung on the movable guide plate 2161.
The guide portion 2162 of 61 is arched to a position where it does not abut. The solenoid 2164 acts to move the movable guide plate 2161
When you pull up the guide part 21 of the movable guide plate 2161
62 moves to a position parallel to the fixed guide plate 2160,
The rollers 2159 come into contact with the guide part 2162, and the guide part 2
162.

(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.

First, we will explain the operation when measuring eyeglass frames.

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, slope 2 of 2005 for the front part of the glasses 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
8a. 2018bk-Left and right (7) I, J Bring the parts into contact.

In this example, frame pressing 2004, 2005
, 2008.2011 are interlocked, constant torque spring 2
033 in the direction toward the OR and OL, and the frame press 2020 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 toward the approximate geometric center of the lens frame, and the frame presser 220 moves the center position of the frame to OR, It is held at the midpoint of OL. Also, frame pressing 2008, 201
1 is the ridge line of the four frame presses 2013, 2015, 2
Since it rotates within the plane created by 017.2019, the center of the bevel groove on the lens frame
．． The center positions of 2008 and 211 are always held within the measurement plane.

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 the botension meter 2046 with reference to the ridge line 2019 formed by the rim 18b.

In Fig. 8-2, when the bevel groove is inclined at a certain angle with respect to the measurement surface, the frame press 2011 is inclined along the rim part, and the botension meter 2 is measured by an amount equivalent to this inclination.
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 bevel 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 @0, 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 measuring element drive unit 2150 and the moving direction of the frame presser 2008 or 2011 match.

Next, when the guide part 2162 of the movable guide plate 2161 is moved to a predetermined position by the solenoid 2164, and the probe driving part 2150 is moved in the direction of the frame presser 2008 or 2011, the roller 2159 moves toward the fixed guide plate 2162.
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 unit 215Q further moves, the bevel measuring element 2125 is inserted into the bevel groove of the lens frame, the measuring element part 2120 stops moving at FR, and the measuring element driving unit 2150
moves to FRL and stops. Next, the valve 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 vector 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='l, 2.....N). After converting this measurement data (r, e, z) into polar coordinates and rectangular coordinates, any four points (x+ '/+ z+ ) (X2. y
! , z2 > (X36 y3, Z3) (X4. y4
．． Z4) Find the frame curve CF (the calculation formula is the same as how to find the lens curve).

In addition, in Figure 10, from the x, y component (xn, yn) of (xn, yn, zn), the measured point A (xa, ya) has the maximum value in the X direction, and the measured point A (xa, ya) has the minimum value in the x axis direction. Select the measurement point B (cxb, yb), the measurement point C (xc, yc) with the maximum value in the y-axis direction, and the measurement point D (xd, yd) with the minimum value in the y-axis direction, and geometric center O
F (xF, yF), and the rotation center Qo (xo
, yO〉 and the distance between OO and OF (△X, △
y), 1/2 of the lens frame geometric center-to-center distance FPD is obtained as FPD/2=(L-ΔX)=(L-(xF-xo))...{2).

Next, the amount of intrusion ■ is calculated from the interpupillary distance PD set in the input unit 4, − (L − (xF − xo ) − PD/2)
------- (3) and based on the set upper adjustment It, J, the position QS (xs, ys) where the optical center of the addendum should be located is determined as Os (xs, ys ) − (xF 1, yF +U).

From this Os, (xn, yn) is converted into polar coordinates centered on Q3, and the processed data is (srn, sen > (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.

Esaka Seizen Seiko Next, the operation when measuring a template will be explained.

The pins 2078a and 2078b of the template holder 2077 attached to the lid 2073 of the template holder 2000B are engaged with the holes formed in the template, and the template is fixed to the template holder 2077 with set screws 2079. In this embodiment, the lid 2
When 073 is closed, the center of the template holder 2077 is
Since it is located above and coincides with the center of rotation of the measuring stylus section 2120, the geometric center of the template and the measuring stylus section 2
The rotation centers of 120 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 y-axis direction coincides with the moving direction of the probe drive unit 2150, and the probe drive unit 2150 is located at the reference position O.

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 moves roughly, pushing the center arm 2002, right arm 2006, and left arm 2009 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 7 flange portion 21 of the template measuring roller 2126
26a is maintained at a certain amount above the top surface of the template. After moving to the probe drive unit 2150ffiFOL, the solenoid 2064 is activated and the center arm 2002. The right arm 2006 and 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 21507E is returned to the reference position. At this time, the guide portion 216 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 number of unit rotation pulses. At this time, the measuring head part 2120 moves the shaft 201 according to the radius vector of the template.
0a. 201Ob, and the amount of movement is read by a potentiometer 2134. The rotation angle O of the pulse motor 2107 and the reading amount of the potentiometer 2134 "The template shape is (rn, On) (n=.1
, 2, ..., N).

From this measurement data (rn, en), the geometric center O is determined as in the case of frame measurement, and the FPD.
PD, Uchikit! This is the modified data based on the amount ■ and the upper shift amount U (s rn, sep ) (n=1, 2,...
..., N) is obtained.

(c) Unprocessed lens shape measuring section (a) Structure Figure 11 shows the entire shape measuring section of the unprocessed lens for detecting the curve value, edge thickness, etc. of the lens after grinding under predetermined conditions. FIG. 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 and a flange 509 are respectively attached thereto.

A sensor plate 510 and a spring 511 are assembled to the pulley 507.

As shown in FIG. 14, a spring 511 is attached to the booley 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, and the pin 511 rotates.
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 vehicle JX5 is mounted between it and the pulley 507.
14, the rotation of the motor 503 is transmitted to the booley 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.

The rotation of the boley 507 causes the boley 508 to which the pin 512 is attached to rotate one rotation, and the rope 52 hung between the rotary shaft of the potentiometer 506 and the pulley 520
] by pulley 508■ Rotation is by potentiometer 5
Detected on 06. At this time, @501 and flange 509 rotate simultaneously with the rotation of boley 508. spring 522
is for keeping the tension of the lobe 521 constant.

The feelers 523 and 524 are rotatably assembled 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
Reference numeral 5 detects the relief positions and measurement positions of feelers 523 and 524 for 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 the potswitch 505.

As shown in FIG. 16, a shaft 529 to which a microsinch 528 is attached is arranged on the measuring arm 527.
9 has a rotatable arm 531 having a rotatable feeler 530, which is held in the direction of the arrow by a spring 532.
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 installed so as to come into contact with the lens edge, but when the lens is not suitable for processing, the feelers 523 and 524 also show abnormal data, so the feeler It is possible to omit 530.

(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 escape position, when the carriage 700 holding the lens moves in the direction of the arrow, the feeler 523 and the lens do not interfere, and the feeler 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 of the eyeglass frame that is inserted into the frame after lens processing or the lens shape data. 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 lens shape data, the feeler 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 the movement of the feeler 530, the motor 503 is rotated to bring the feeler 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 feeler 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 feeler 523 moves to the position indicated by the two-dot chain line in the figure, the force of the spring 5]1 attached to the pulley 507 acts to bring the feeler 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 of the eyeglass frame or the tree shape data, and the feeler 523 moves in the direction of arrow 537. meter 50
6 to obtain the shape of the refractive surface of the lens. Also,
At the same time, the microswitch 528 measures whether the lens can be processed into a lens 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 thereof is measured using the feeler 524 in the same manner as the measurement of the front refractive surface.

(2) Table 8 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 applied lens is plastic or glass;
A frame switch 403 that indicates whether the frame material is straight or metal, a mode switch 404 that selects the processing mode as flat processing or bevel processing, and an R/L switch that selects whether the lens to be processed is for the left or right eye. 405, a far/near switch 406 for converting the upper/lower layout of the lens optical center and PD value between far and near vision, an input changeover switch 407 for selecting a setting data change item, and an item selected by the input changeover switch 407. Increase/decrease data + switch 408
and -switches 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-stroke switch 415 for double finishing, trace switch 4 for instructing lens frame and template tracing
16, there is a next data switch 417 that transfers 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 has a main calculation control circuit that displays setting values for processing information, bevel positions, reference setting values, etc. for simulating the bevel position and the fitting state between the bevel and the lens frame, etc. Displayed under the control of

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 bevel simulation screen.

(3) The electrical control system of this embodiment having the above-mentioned mechanical configuration 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 power supply, optometry system equipment, etc. via the serial communication board, and can also exchange data with the tracer calculation control circuit of the lens frame and template shape measuring section.
communicate.

A display section 3, an input section 4, and an audio reproduction device are connected to the main arithmetic control circuit.

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. It's worn out.

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 a pulse motor driver. It is connected to the main processing circuit via a pulse generator. The pulse generator is a device for receiving commands from the main processing circuit to control how many pulses are output to each pulse motor at how many cycles, that is, to control the operation of each motor.

The processing pressure motor 733, the percentage 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 658 and the water bomb motor are driven by an AC power source, and their rotation and stop are controlled by a switch circuit that is controlled by commands from the main arithmetic and control circuit.

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

Potentiometer 21 that measures 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 the tracer calculation control circuit via the pulse motor driver. Further, the tracer moving motor 2152, the frame fixing solenoid 2064, and the probe fixing solenoid 21$;/4 are driven by respective drive circuits that receive commands from the tracer numbing 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.

Further, 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.

(4) The operation of the lens grinding device 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
Set whether the PD applied by 06 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.

e means the required working distance, 12 means the distance between the Japanese corneal vertices, and 13 means 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. 63-82621.

Further, the upper and lower layouts are also set to the setting elevation input in advance in the above-mentioned standard IIi setting for both the near and far areas. If the operator wants to change the value, he or she can change it using the (+> switch 4oPc->switch 409. At this time, the PD can also be changed.

Step 1-3 Radial information and FPDI of the frame or template obtained in Step 1-1! Based on the PD top and bottom layout information input in the previous step, the coordinates are transformed to a new coordinate center using the method described above, and new radius vector information (rS6nSrSθn) is obtained.
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.
The L changeover switch 405 is used to input flat processing or bevel processing 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 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 Karen's 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 used after being left and right reversed.

Step 1-5 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- If there is no abnormality in the above steps, turn on the start switch 41.
Press 1 to start.

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

'In the PC, point a is the center of rotation of the grindstone, point b and t is the center of lens processing, R is the radius of the grindstone, LE is frame data, and L is the distance between the center of rotation of the grindstone and the center of lens processing. Here, the radius vector information (rs6n, rsθn) is read from the frame data memory, and the following calculations are performed.

L − rs δncosrsθn+R”−(rsa
n siri rsa n ding (n-1.2.3...
-N) When the astigmatism axis is other than 180°, offset rsθn by that difference and use that rsθ1n instead of rsθn.

Next, the radius vector information (rs6n, rsθn) 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 ξi (i = 1.2.3...
・N> and rotate 360° sequentially from ξi to ξn. The maximum value of each ξi, 21H, at that time ``
Let Sθn be θi. Also (L1ξ1θi)(; =1
．． 2.3...N) is used as processing correction information and stored in the frame data memory.

If the designation in step 1-4 is beveling mode, the process advances to step 2-2, and if the designation is flat machining mode, the process advances to step 3-1.

Step 2-2 When the beveling mode is specified, the main arithmetic and control circuit rotates the lens rotation axis motor 721 via the pulse generator and the pulse motor driver, and rotates the lens so that rsθn points toward the center of rotation of the grinding wheel. Rotate the shafts 704a and 704b.

Next, rotate the carriage with 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 surface on the line of radius vector information is measured using the aforementioned unedited lens shape measuring mechanism. The lens front edge position thus determined is defined as rZn, and the lens rear edge position is defined as tZn. This is the top information (lZn, rZn) (n
−1.2.3---N> and store it in the frame data memory.

It was determined that there was a part where the lens outer diameter was smaller than the lens diameter.d
If so, it is determined that a lens with the desired lens frame shape cannot be obtained, a warning is displayed on the display unit, and execution of subsequent steps is stopped.

Step 2-3 A front curve and a rear curve are determined from the edge information (IZn, rZn>) determined in Step 2-2.

First, the radial information (rs5n, rsθn〉) is converted into orthogonal coordinates (
Xn. Yl1). Any four points (X, Y
1 ), (X2, Y2 >, (X3, Ys ) (X4.
Y4) each edge information (IZ, +2,).
(I22, 122>, (I 23, 123), (I24
, l Z4), first find the front curve and its center.

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

a=D. /D 1)=Dz/D C=D3/D Here, next, all the wires Z are rzt. : Replace to find the rear curve and its center. The bevel curve is calculated based on this information.

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 or too gentle, the frame may It is inconvenient to insert it. Therefore, if the front curve value is within a certain width, the bevel curve will form the same curve as the front curve. The position of the apex of the bevel is set a certain amount behind 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.

If the bevel curve exceeds a certain width, the edge information (IZ
n, rZn), lZn+(rZn-IZn)R/10=yZn to yZ
Find n. In this case, if the shaku = 4, it is equivalent to setting the edge thickness at a ratio of 4:6.

If a curve along the front curve is possible, use the data as (rsθn, ylZrd; if it is not possible, use R
The data obtained as −4 is set as (rsθn.V*Zrl) as bevel data.

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.

The frame shape is displayed on the display based on the radius vector information (rs6n, rsOn), and a cursor 30 that rotates roughly around the processing center is displayed. The bevel cross section 32 at the position where the cursor and the frame shape are in contact is displayed on the left side of the panel. The cursor is (
+) While the switch is pressed, it rotates to the right. (-) While the switch is pressed, it rotates to the left, and the bevel cross section at that position is always displayed.

When the rotation cursor is at the position indicated by the rim thickness measurement position mark 31, the rim position mark 33 is located at the upper left of the bevel cross section.
Display.

The bevel and 4th positions are positions where 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, the rough grindstones 60G and 14 for plastic are moved by a motor.

After rotating the grindstone, the motor moves the distance L between the center of rotation of the grindstone and the center of lens processing to 11 of the processing correction information (Li, ξr, oi) read from the frame data memory. At that time, wait until the machining end photo switch 727 is turned on, rotate the angle to ξ2, and at the same time turn L to L.
I will be transferred up to 2.

Continuously perform the above operations (Li ξi>(i=12,3
・・・・・・Conduct based on N). As a result, the lens is processed into the shape of diameter information (rsδn/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 (L1, ξi, (9i) and Yagun data (rs6n, rsθn) or (rsθn, ykZn
> is obtained by converting the beveled data YZi.

First, convert rsθn such that Oi=rsθn to i=1,2
, 3...N. rsθn at that time
The bevel positions ylZn or ykZn for each are sequentially selected, converted into the bevel processing information (Liξ+zr) as Zi, and then stored in the frame data memory again.

Based on this information, Yagen sets L1 for motor 728, ξ1 for motor 721, and ξ1 for motor 7]4 and Zi for each r=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, the lens to be processed is placed on the RC grinding wheel 60a for glass if the lens is made of plastic and the rough grinding wheel 60G for glass is set according to the settings made in step 1-4. The carriage is moved by motor 714. After rotating the grindstone, the motor 728 moves the distance L between the center of rotation of the grindstone and the center of lens processing to li of the processing correction information (Liξi (9i)) read from the frame data memory. At that time, the processing end photo switch 727 is activated. Wait until it turns ON, rotate the angle to ξ2, and at the same time move L to 12.Continuously repeat the above operations (Liξi)(i-1.2,
3.・・・・・・Conducted based on N).

Thereby, the lens is processed into the shape of radius vector information (rs6n, rsθn>).

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 60G by the carriage movement motor 714. 6Here, step 2
- Finish the outer periphery of the lens LE using the same finishing method as for 8 and below.

Of course, this explanation is based on the principle of operation, and various changes can be made depending on the degree of automation.

Although the positional embodiments of the present invention have been described above, it is obvious to those skilled in the art that the embodiments can be easily modified based on the same technical idea as the present invention, and these are also included in the present invention. Needless to say.

[Effects of the Invention] According to the present invention, since the rim thickness can be obtained at a predetermined location or around the entire circumference of the eyeglass frame, the bevel position can be easily determined to achieve the optimal fitting state depending on the type of each frame and lens. can be obtained.

Furthermore, since the rim thickness of the frame is obtained, it is possible to completely automate the grinding process by taking this into consideration and making corrections.

[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 sectional view of the carriage, Fig. 3-a is a view taken from arrow A showing the drive mechanism of the carriage, and Fig. 3 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 this embodiment, and FIG. 6-1 is a diagram showing the frame holding section 2000A. 6-2 is a detailed view of the holding part, FIG. 6-3 is a diagram explaining the lens holding mechanism, and FIG. 6-4 is a view of a part of the housing 2001 viewed from the back side. 6-5 is a diagram for explaining the rim thickness measuring mechanism, and FIG. 6-6 is a diagram for explaining the frame fixing mechanism. Figure 7-1 is a plan view of the measuring section, and Figure 7-2 is its C.
-C sectional view, FIG. 7-3 is a DD sectional view, and FIG. 7-4 is an EE sectional view. 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 an unprocessed lens, and FIG. 13 is a plan view of the shape measuring section of an unprocessed lens. FIG. 15 is a diagram showing the correspondence between each signal of the photo switch 504 and the photoswitch 505, FIG. 16 is a diagram for measuring the lens radius, FIG. 17-1, FIG. 17-2,
FIG. 17-3 is a diagram illustrating the measurement operation of the measurement section. Fig. 18 is an external view of the display unit and input unit of this embodiment, 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 screen for setting lens processing information. This is a screen shot of Jagenschration. 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. 2... Lens frame and template shape measuring device 3...
... Display section 4 ... Input section 5 ...
...Lens shape measuring device

Claims (7)

[Claims] (1) An eyeglass frame tracing device that measures the lens shape directly from the eyeglass frame, characterized by being equipped with a rim thickness measuring means for measuring the distance between the center of the front edge of the rim of the eyeglass frame and the V-groove into which the lens is inserted. Eyeglass frame tracing device. (2) The rim thickness measuring means of item 1 includes a V-groove position measuring means for measuring the position of the lens insertion V-groove, and a rim leading edge measuring means for measuring the rim leading edge of the eyeglass frame, An eyeglass frame tracing device characterized in that the rim thickness is determined by calculation from the measurement results of both the groove position measuring means and the rim leading edge measuring means. (3) An eyeglass frame tracing device characterized in that the V-groove position measuring means in item 2 is a mechanism that measures the vertical deviation of a tracing stylus that measures radius vector information of a lens shape. (4) An eyeglass frame tracing device, wherein the rim thickness measuring means of item 1 or 2 measures the rim thickness at a predetermined location or around the entire circumference. (5) An eyeglass frame tracing device, characterized in that the rim thickness measuring means according to item 4 is provided with a measuring pin on the means for holding the eyeglass frame, and measures the amount of movement of the measuring pin. (6) In an eyeglass lens grinding machine having a means for measuring virtual edge thickness before grinding an unprocessed lens, the rim thickness measures the distance between the center of the front edge of the rim of the eyeglass frame and the lens insertion V groove. It has an eyeglass frame tracing device having a measuring means, and compares the virtual bevel position determined based on the measurement result of the virtual edge thickness measuring means with the measurement result measured by the eyeglass frame tracing device to obtain a lens after grinding. 1. An eyeglass lens grinding machine characterized by having means for displaying in advance the fitting state between the eyeglass frame and the eyeglass frame. (7) An eyeglass lens grinding machine, characterized in that the means for displaying in advance the fitted state of the lens and the spectacle frame after the grinding process as set forth in item 6 graphically displays the fitted state.