JP2777167B2 - Eyeglass frame tracing apparatus and eyeglass lens grinding machine having the same - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a spectacle frame tracing device for measuring a lens shape of a spectacle frame, and a spectacle lens grinding machine (a balling machine) having the same.

[Prior art and its problems] The conventional spectacle frame tracing device and the spectacle lens grinding machine having the same measure only the radial information of the lens shape, and did not measure the rim thickness of the spectacle frame. .

Therefore, when determining the bevel position in the edge direction of the edge of the lens in the edge direction, the processor specifies the position of a certain ratio with respect to the edge thickness, or specifies the bevel position dimension in the edge thickness direction. Heavily relied on his experience and intuition.

Further, since the fitting state between the lens and the spectacle frame cannot be confirmed until the lens is actually put into the spectacle frame after the beveling, a problem may occur in the fitting state between the spectacle frame and the lens.

Recent eyeglass frames are available in various rim thicknesses, and this problem is a major obstacle in the automation of a balling machine.

SUMMARY OF THE INVENTION An object of the present invention is to determine the bevel position so that the rim thickness of the spectacle frame can be measured and the rim thickness information of the spectacle frame is most suitable for the spectacle frame in view of the problems of the related art. An object of the present invention is to provide a spectacle frame tracing device and a spectacle lens grinding machine (a balling machine) having the same.

[Configuration of the Invention] In order to achieve the above object, the present invention is characterized by having the following configuration.

(1) In a spectacle frame tracing device for measuring the shape of a spectacle frame, a thickness detecting means for detecting a thickness between a rim front edge of the spectacle frame and a center of a rim groove is provided.

(2) The rim has a contact that comes into contact with the rim front edge and measures the position of the rim front edge, and the rim has a contact that is inserted into the rim groove. Rim groove center position measuring means for measuring the position of the groove center, and calculation for calculating the distance between the rim front edge and the center of the rim groove based on the measurement results of the rim groove center measuring means and the rim leading edge position measuring means. And means.

(3) The rim groove center position measuring means of (2) is a displacement measuring means for measuring a displacement in a direction orthogonal to the radial direction by using a tracing stylus for measuring a moving radius of the spectacle frame. Features.

(4) The thickness detecting means of (1) or (2) measures a thickness between a rim front edge and a center of a rim groove at a predetermined location or the entire circumference.

(5) The thickness detecting means of (4) is characterized in that a measuring pin is provided in the means for holding the spectacle frame, and the movement amount is measured.

(6) In a spectacle lens grinding machine for processing an edge of a spectacle lens according to the shape of a spectacle frame, a first input unit for inputting a shape of the spectacle frame, and an edge position of the spectacle lens based on the input shape are obtained. Edge measuring means, second input means for inputting information on the arrangement of the spectacle lens with respect to the spectacle frame, thickness detecting means for detecting the thickness of the rim front edge of the spectacle frame and the center of the rim groove, the first input means, And a bevel determining means for determining a bevel to be formed on the spectacle lens based on each information of the second input means, the edge measuring means and the thickness detecting means.

(7) The bevel determining means of (6) is a calculating means for calculating the bevel position to be formed on the spectacle lens by a predetermined method, a display means for displaying the calculated bevel position, and a displayed bevel. It has a changing means for changing the position.

Embodiment An embodiment of the present invention will be described below in detail with reference to the drawings.

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

Reference numeral 1 denotes a base of the apparatus, on which components constituting the lens grinding apparatus are arranged.

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

A display unit 3 that displays measurement results, calculation results, and the like in characters or graphics and an input unit 4 that inputs data and instructs the apparatus are arranged in front of the display unit 3.

At the front of the apparatus, there is a lens shape measuring device 5 for measuring the virtual edge thickness and the like of the unprocessed lens.

Reference numeral 6 denotes a lens grinding unit, a rough grinding wheel 60a for a glass lens, a rough grinding wheel 60b for a plastic, and a rough grinding wheel 60c for beveling and flat machining.
Is rotatably attached to the rotating shaft 61. The rotation shaft 61 is fixed to the base 1 with a band 62.

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

 Reference numeral 7 denotes a carriage unit, and 700 denotes a carriage.

(2) Configuration and operation of each part (a) Carriage part The structure will be described with reference to FIGS. FIG. 2 is a sectional view of the carriage. FIG. 3-a is an arrow view A showing the drive mechanism of the carriage, and FIG.
It is BB sectional drawing of a figure.

A carriage shaft 702 is rotatably supported on a shaft 701 fixed to the base 1, and a carriage 700 is rotatably supported on the carriage shaft 702. Timing pulleys 703a, 703b, 703c having the same number of teeth are respectively fixed to the carriage shaft 702 at the left end, the right end, and between them.

Lens rotating shafts 704a, 704b are coaxially and rotatably supported on the carriage 700 in parallel with the shaft 701 and at a constant distance. The lens rotation shaft 704b is rotatably supported by the rack 705, and the rack 705 is movable in the axial direction.
It can be moved in the axial direction by a pinion 707 fixed to the rotation axis of the motor 706, whereby the lens LE can be held between the lens rotation axes 704a and 704b. Note that the lens rotation axis 704
Pulleys 708a and 708b having the same number of teeth are mounted on the respective a and 704b, and they are timing belts 709a and 709b.
And are connected to pulleys 703c and 703b.

An intermediate plate 710 is rotatably fixed to the left side of the carriage 700. The intermediate plate 710 has two cam followers 711, which sandwich the guide shaft 712 fixed to the base 1 in a positional relationship parallel to the shaft 701. A rack 713 is fixed to the base 1 in a positional relationship parallel to the shaft 701 on the intermediate plate 710, and a carriage left / right moving motor 714
Meshes with the pinion 715 attached to the rotating shaft of. With these structures, the motor 714 can move the carriage 700 in the axial direction of the shaft 701.

A driving plate 716 is fixed to the left end of the carriage 700, and a rotating shaft 717 is attached to the driving plate in parallel to the shaft 701 and rotatably. A pulley 718 having the same number of teeth as the pulleys 708a and 708b is attached to the left end of the rotating shaft 717, 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.
The 720 meshes with the gear attached to the motor 721. When the motor 721 rotates, the pulley 718 is rotated by the gear 720, and the carriage shaft 7 is rotated via the timing belt 719.
02 rotates, thereby rotating the lens chuck shafts 704a and 704b via the pulleys 703b and 703c, the timing belts 709a and 709b, and the pulleys 708a and 708b.

The block 722 is fixed to the drive plate 716 coaxially and rotatably with the rotation shaft 717, and the motor 721 is fixed to the block 722.

The intermediate plate 710 has a shaft 72 in a direction parallel to the shaft 701.
3 is fixed, and a correction block 724 is attached to the shaft 723.
Are rotatably fixed. Round rack 725 is rotating shaft 717
It is arranged so as to be slidable in parallel with the shortest line segment connecting the axes of the shaft 723 and the shaft 723, and penetrating through holes formed in the block 722 and the correction block 724. A stopper 726 is fixed to the round rack 725, and can slide only below the contact position of the correction block 724.

A sensor 727 is provided on the intermediate plate 710, and the state of contact between the stopper 726 and the correction block 724 can be confirmed, and the grinding state of the lens can be known.

A pinion 730 fixed to the rotating shaft 729 of the motor 728 fixed to the block 722 is engaged with the round rack 725,
Accordingly, the distance γ ′ between the rotating shaft 717 and the shaft 723 can be controlled by the motor 728.

Further, with such a structure, a linear relationship is maintained between γ ′ and the rotation angle of the motor 728.

The distance (BC) between the grinding wheel rotation center B and the shaft 701 is α, the distance (AC) between the lens chuck shafts 704a, 704b and the shaft 701 (β) is β, the lens chuck shafts 704a, 704b and the grinding wheel rotation center. , The angle between α and β is θ,
The distance (CD) between the shafts 723 and 701 is α ′, the distance (CE) between the rotating shaft 717 and the shaft 701 β ′, and the angle between α ′ and β ′ is θ ′. .

 FIG. 4 schematically shows the positional relationship.

α, α ', β, β' are invariable, and the center of rotation of the grindstone and the center points of the shafts 701, 723 are invariant on the plane of the drawing. The center point rotates around the shaft 701 while keeping the relative proper positional relationship unchanged.

Here, if θ = θ ′, α ′ / α = β ′ / β, then △
ABC and △ EDC are similar. At this time, α '/ α = γ' /
γ, and γ ′ and γ have a linear correlation.

With such a structure, the block 722 in which the motor 721 for rotating the pulley 718 that rotates about the rotation shaft 717 is fixed is moved around the point E by following the change in △ CED when γ ′ is changed. To rotate.

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

When γ 'and γ are changed by the motor 728 while rotating the pulley 718, the pulley viewed with the line segment ED as a reference line
The rotation angle of 718 and the rotation angle of the lens axis when the line segment AB is used as a reference line are equal. Also, the motor 721 and the lens shaft 704a,
There is also a linear correlation with the rotation of 704b.
In other words, the distance between the grinding wheel axis and the lens axis is
The lens shafts 704a and 704b change with a correlation with the output shaft rotation angle of the motor and rotate with a linear correlation with the output shaft rotation angle of the motor 721.

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

(B) Lens frame and template shape measuring unit (tracer) (a) Configuration The configuration of the lens frame and template shape measuring unit 2 will be described with reference to FIGS.

FIG. 5 is a perspective view showing a lens frame and a template shape measuring unit according to the present embodiment. The headquarters is built into the main body and consists of two main parts: a frame and template holding unit 2000 that holds the frame and template, and a measuring unit 2100 that digitally measures the shape of the lens frame and template of the frame. It is configured. The frame and template holding unit 2000 has two more
And a frame holding unit 2000A and a template holding unit 2000B.

Frame holding unit In FIG. 6-1 showing the frame holding unit 2000A, the geometric center points of the lens frame when the spectacle frame is set in the frame holding unit 2000A are determined as reference points OR and OL, and these two points are defined. The passing straight line is set as a reference line.

The frame holding unit 2000A has a housing 2001. The center arm 2002 is slidably mounted on guide shafts 2003a and 2003b mounted on the surface of the housing 2001. At the end of the center arm 2002, there are frame presses 2004 and 2005 at the same intervals as OR and OL. .

Similarly, the light arm 2006 is connected to the guide shaft 2007a, 2
On the 007b, the left arm 2009 is attached to the guide shaft 2010a, 2
The right and left arms 010b and 010b are slidably mounted, and a frame pusher 2008 is rotatably supported at the tip of the right arm 2006, and a frame pusher 2011 is rotatably supported at the tip of the left arm 2009.

Center arm 2002 is frame pusher 2004, 2005 is OR,
The right arm slides in the direction perpendicular to the reference line so that it passes through the OL. The right arm 2006 passes through the OR, and the left arm 2009 passes through the OL so that the frame pushing 2011 passes through the OL. Sliding in an inclined direction.

In FIG. 6-2, the frame pushing work 2004, 2005, 200
8, 2011 are two slopes that intersect each other (2012a, 201
2b), (2014a, 2014b), (2016a, 2016a), (2018a, 20
18b), the ridge line created by each of the two slopes
15, 2017 and 2019 are on the same plane (measurement plane), and the rotation axes of the frame presses 2008 and 2011 are also on this measurement plane.

In addition, the center arm 2002 has a semicircular frame press.
2020 is slidably mounted on guide shafts 2021a and 2021b attached to the center arm 2002. In FIG. 6-3, a spring 2022 is set so that the frame pushing 2020 is always pulled toward the center arm. One end is center arm
It is hung on a pin 2023a planted in 2002 and the other end is hung on a pin 2023b planted in a frame pusher 2020.

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

Pulleys 2024a, 2024b, 2024c, 2024 on the back of the housing 2001
d is rotatably supported, and a wire 2025 is hung on the pulleys 2024a to 2024d, and holes 2028a and 2029 of the housing 2001 are provided.
It is fixed to a pin 2026a planted on the center arm 2002 and a pin 2027 planted on the light arm 2006, which protrude from the back surface through a.

Similarly, pulleys 2030a, 2030b, 2030
c and 2030d are rotatably supported, and pulleys 2030a to 2030d
, A wire 2031 is hung, and the hole 20
Center arm 2 protruding from the back through 28b and 2029b
002 and a pin 2032 implanted in the left arm 2009. A constant torque spring 2033 that constantly pulls the center arm 2002 in the OR and OL directions is mounted on the back of the housing 2001 on a drum 2034 rotatably supported on the back of the housing 2001.
One end of 2033 is a pin 2035 implanted in the center arm 2002
It is stuck to.

Further, a claw 2036 is implanted in the center arm 2002, and when the frame is not held, the housing 20
01 is in contact with the microswitch 2037 attached to the back surface, and the state of holding the frame is determined.

The left arm 2009 incorporates a rim thickness measuring unit 2040 that measures the thickness of the rim of the frame.

A pulley 2042 is fixed to a rotating shaft 2041 of the frame pushing 2011, and rotates integrally with the frame pushing 2011, and a pulley that rotates independently of the rotation of the frame pushing 2011 is attached to the rotating shaft 2041. 2043 is pivotally supported, and a rim thickness measuring pin 2044 is implanted in the pulley 2043.

Further, a hollow rotary shaft 2045 is rotatably supported on the left arm 2009, and a potentiometer 2046 is provided at one end.
However, a pulley 2047 is attached to the other end. A wire 2049 whose both ends are fixed to each pulley is hung between the pulley 2042 and the pulley 2047, and the potentiometer 2046 and the frame pusher 2011 always rotate in the same direction in conjunction with each other.

In FIG. 6-5, one end of the wire 2050 is a pulley.
Pin fixed to 2043, fixed to pulley 2048 on the way, the other end is implanted in left arm 2009 via spring 2051
The axis of the potentiometer 2046 rotates according to the movement of the rim thickness measuring pin 2044.

In this embodiment, only one rim thickness measurement is performed. However, a contact that can move up and down and that can detect the amount of movement is attached to the tracing stylus 2120 and is brought into contact with the rim front when measuring the lens frame shape. Can be detected in the vertical direction. From the data on the front surface of the rim and the data in the vertical direction of the V-groove, the rim thickness over the entire circumference of the lens frame can be measured.

In FIG. 6-6, a pressing plate 2061 having a brake rubber 2062 adhered to one surface thereof is rotatably mounted on a housing 2001 by a shaft 2063 mounted on the pressing plate 2061, and the solenoid is mounted on the housing 2001. One end of the sliding shaft of 2064 is attached to the pressing plate 2061. 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.
Pulls the push plate 2061 in a direction not to contact the center arm 2002. When the solenoid 2064 acts and presses the push plate 2061 against the spring 2065, the brake rubber 2062 comes into contact with the center arm 2002, and the center arm 2002 and the right arm 2006 and the left arm 2009 which move in conjunction with the center arm 2002 are moved. Fix it.

Template Holder Template holder 2000B is shown in FIGS. 5 and 6-1.
It is supported by columns 2071a, 2071b, 2071c, 2071d planted in the housing 2001. The board 2072 is fixed to the columns 2071a to 2071d. The lid 2073 is a shaft 20 implanted in the lid 2073.
74a and 2074b are engaged with bearings 2075a and 2075b formed on the substrate 2072, and are mounted on the substrate 2072 in a rotatable manner. substrate
2072 has a hole enough to allow the spectacle frame to enter and exit 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. Pins 2078a and 2078b are implanted in the template holder 2077, and holes formed in the template and pins 2078a and 2078a are formed.
Engage 78b and set the template with the set screw 2079.
Fix to 7. The center of this template holder 2077 is the lid 207
3 is configured to be located on the OR in a closed state.

Measuring Unit Next, the configuration of the measuring unit 2100 will be described with reference to FIG. FIG. 7 is a plan view of the measuring unit, and FIG. 7-1 is a cross-sectional view taken along line CC of FIG.

Shaft holes 2102a, 2102b, 2102c are formed in the movable base 2101, and the shafts 2103a, 2103b attached to the housing 2001 are formed.
Slidably supported by Further, a lever 2104 is implanted in the movable base 2101. The movable base 2101 is slid by the lever 2104, so that the rotation base 2101 is rotated.
The rotation center of 2105 is O
Move to R, OL position. Pulley for movable base 2101
A rotation base 2105 on which a 2106 is formed is rotatably supported. Pulley attached to the rotating shaft of pulse motor 2107 attached to pulley 2106 and movable base 2101
A belt 2109 is stretched between the belt 2108 and the rotation of the pulse motor 2107 to the rotation base 2105.

As shown in FIG. 7-3, four rails 2110a, 2110b, 2110c, 2110d are mounted on the rotating base 2105, and the probe 2120 is slidably mounted on the rails 2110a, 2110b. Have been. The stylus part 2120 has a shaft hole 2121 formed in the vertical direction.
2122 has been inserted.

A ball bearing 2123 is interposed between the tracing stylus shaft 2122 and the shaft hole 2121, thereby smoothing the vertical movement and rotation of the tracing stylus shaft 2122. An arm 2124 is attached to the upper end of the tracing stylus shaft 2122, and a solo van ball-shaped bevel tracing stylus 2125 that is in contact with the bevel groove of the lens frame is rotatably supported on the upper portion of the arm 2124.

A cylindrical template measuring roller 2126 abutting on the edge of the template is rotatably supported below the arm 2124. The circumferential points of the bevel tracing stylus 2125 and the template measuring roller 2126 are configured to be located on the center line of the tracing stylus shaft 2122.

Below the tracing stylus shaft 2122, a pin 2128 is implanted in a ring 2127 rotatably attached to the tracing stylus shaft 2122, and the movement of the pin 2128 in the rotational direction is formed in the tracing stylus portion 2120. Limited by slot 2129. The tip of the pin 2128 is attached to the movable part of the potentiometer 2130 of the tracing stylus 2120, and the amount of vertical movement of the tracing stylus 2122 is detected by the potentiometer 2130.

A roller 2131 is rotatably supported at the lower end of the tracing stylus shaft 2122. A claw 2132 is implanted in the tracing stylus 2120.

A pin 2133 is implanted in the tracing stylus part 2120, and a pulley 2135 is attached to a shaft of a potentiometer 2134 attached to the rotating base 2105. Rotation base
Pulleys 2136a and 2136b are rotatably supported by 2105, and a wire 2137 fixed to a pin 2133 is connected to the pulley 2136.
a, 2136b, and fixed to the pulley 2135.
In this way, the amount of movement of the stylus
It is configured to detect by 2134.

The stylus 2120 is always armed on the rotating base 2105.
The constant torque spring 2140 that pulls to the tip side of the 2124
The fixed torque spring 2140 is fixed to one end of a pin 2142 implanted in the tracing stylus 2120, and is attached to a drum 2141 rotatably supported by the 2105.

A tracing stylus drive unit 2150 is slidably mounted on rails 2110c and 2110d on a rotating base 2105. A pin 2151 is implanted in the probe driving unit 2150, and the rotation base 2105
The pulley 2153 is attached to the rotation axis of the motor 2152 attached to
Is attached. Pulley 2154 on rotating base 2105
a and 2154b are rotatably supported on a shaft, and a wire 2155 fixed to a pin 2151 is hung on pulleys 2154a and 2154b and fixed to a pulley 2153. Thereby, the rotation of the motor is transmitted to the tracing stylus drive unit 2150.

The tracing stylus drive unit 2150 is in contact with the tracing stylus unit 2120 that is pulled toward the tracing stylus driving unit 2150 by the constant torque spring 2140. It can be moved to a position.

In addition, the tracing stylus drive unit 2150 has an arm 2157 at one end that comes into contact with a roller 2131 that is rotatably supported at the lower end of the tracing stylus shaft 2122, and an arm 2158 that rotatably supports the roller 2159 at the other end. The attached shaft 2156 is rotatably supported. Coro 21
One end of the torsion spring 2166 is hung on the arm 2157, the other end is fixed to the tracing stylus driving unit 2150, and the tracing stylus driving unit 2150 is fixed to the fixed guide plate 2160 fixed to the rotating base 2105. When moved, the roller 2159 moves up and down along the guide plate 2160.

The shaft 2156 rotates by the up and down movement of the roller 2159, and the arm 2157 fixed to the shaft 2156 rotates about the shaft 2156, and the stylus shaft 21
Raise and lower 22. A shaft 2163 is rotatably attached to the rotation base 2105, and a movable guide plate 2161 is fixed to the shaft 2163. One end of the sliding shaft of the solenoid 2164 attached to the rotation base 2105 is a movable guide plate 2161
It is attached to. One end of the spring 2165 is hung on the rotation base 2105, and the other end is hung on the movable guide plate 2161,
Normally, the roller 2159 and the guide portion 2162 of the movable guide plate 2161 are pulled to a position where they do not abut. When the movable guide plate 2161 is lifted by the action of the solenoid 2164, the guide portion 2162 of the movable guide plate 2161 moves to a position parallel to the fixed guide plate 2160, and the roller 2159 contacts the guide portion 2162, and moves along the guide portion 2162. Can be moved.

(B) Operation Next, the operation of the above-described lens frame and template shape measuring device 2 will be described with reference to FIGS. 6 to 10.

Lens Frame Shape Measurement First, the operation when measuring the eyeglass frame will be described.

Select the left or right side of the lens frame of the glasses frame 500 to measure, and set the lever 2104 fixed to the movable base 2101.
To move the measuring unit 2100 to the side to be measured.

Next, pull the frame pusher 2020 toward you,
Widen the interval with 2002 sufficiently. The front part of the eyeglass frame is framed in 2004, 2005 with slopes 2012a, 2012b, 2014
After making contact with a and 2014b, the frame pushing 2020 is returned and brought into contact with the center of the eyeglass frame. Then, while pushing down the center arm 2002, press down the rim thickness measuring pin 2044 at the rim of the eyeglass frame,
The right and left rim parts are brought into contact with the slopes 2016a, 2016b, 2018a and 2018b of 08 and 2011.

In the present embodiment, the frame pushing work 2004, 2005, 2008, 2
011 is interlocked and is pulled in the direction toward OR and OL by the constant torque spring 2033, and the frame pushing 2020 is pulled in the direction of the center arm by the spring 2022, so that the frame pushing 2004, 2005, 2008, 2011 , 2020, the lens frame is held by the force in three directions toward the geometric center of the lens frame, and the center position of the frame is held at the middle point between OR and OL by the frame pushing 2020. Is done. In addition, since the frame presses 2008 and 2011 rotate within the plane created by the four ridges 2013, 2015, 2017 and 2019 of the frame press, the center of the bevel groove of the lens frame is the frame presses 2004 and 2
The center position of 005, 2008, 211 is always held in the measurement plane.

In Fig. 8-1, the rim of the lens frame presses down the rim thickness measurement pin 2044, and when the bevel groove is parallel to the measurement surface, the ridgeline 2019 created by the slopes 2018a and 2018b of the frame pushing work 2011 is used as a reference. The movement amount of the rim thickness measuring pin 2044 can be detected by the potentiometer 2046.

In FIG. 8-2, when the bevel groove is inclined at a certain angle with respect to the measurement surface, the frame pusher 2011 is inclined along the rim portion, and the potentiometer 2046 is equivalent to this inclination.
The rim thickness can always be measured with reference to the ridgeline 2019.

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

When the trace switch on the operation panel is pressed while the frame is set as described above, the solenoid 2064 operates to fix the center arm 2002, the right arm 2006, and the left arm 2009.

In FIGS. 9-1 and 9-2, the probe driving unit 21
The 50 rollers 2159 are at the reference position O, rotate the pulse motor 2107 by a predetermined angle, and rotate the rotary base 2105 to a position where the moving direction of the tracing stylus drive unit 2150 and the moving direction of the frame pushing 2008 or 2011 coincide.

Next, the guide 2162 of the movable guide plate 2161 is moved to a predetermined position by the solenoid 2164, and the tracing stylus drive 2150 is moved in the direction of the frame pressing 2008 or 2011.
59 moves from the guide portion 2160a of the fixed guide plate 2160 to the guide portion 2162b of the movable guide plate 2161, the tracing stylus shaft 2122 is pushed up by the arm 2157, and the bevel tracing stylus 2125 is maintained at the height of the measurement surface.

When the probe drive unit 2150 moves further, the bevel probe
2125 is inserted into the bevel groove of the lens frame,
The movement is stopped by FR, and the tracing stylus drive unit 2150 moves to FRL and stops. Subsequently, the pulse motor 2107 is rotated every predetermined number of unit rotation pulses. At this time, the tracing stylus unit 2120 moves on the guide shafts 2010a and 2010b according to the moving radius of the lens frame, the amount of movement is read by the potentiometer 2134, and the tracing stylus shaft 2122 moves up and down according to the curve of the lens frame. The movement amount is read by the potentiometer 2130. Rotation angle の of pulse motor 2107, reading amount r of potentiometer 2134 and potentiometer
The lens frame shape is (r, Θ, z) (n
= 1,2,... N). This measurement data (r, Θ, z) is converted from polar coordinates to rectangular coordinates (x,
y, z) at any four points (x ₁ , y ₁ , z ₁ ) (x ₂ , y ₂ , z ₂ ) (x ₃ , y ₃ , z
₃ ) A frame curve CF is obtained from (x ₄ , y ₄ , z ₄ ) (the calculation formula is the same as that of the lens curve).

In FIG. 10, the x and y components (xn, yn) of (xn, yn, zn)
From the measured point A (xa, ya) having the maximum value in the x-direction, the measured point B (xb, yb) having the minimum value in the x-axis direction, and the measured point C (maximum value in the y-axis direction) xc, yc) and the measured point D (xd, yd) having the minimum value in the y-axis direction are selected, and the geometric center OF (xF, yF) of the lens frame is calculated as From the known frame center
From the distance L to the rotation center Oo (xo, yo) of the lens and the shift amount (の x, △ y) of Oo and OF, 1/2 of the distance FPD between the lens frame geometric centers is obtained.
Is obtained as FPD / 2 = (L− △ x) = {L− (xF−xo)} (2)

Next, the inset amount I is calculated from the interpupillary distance PD set by the input unit 4, And the position Os at which the optical center of the lens to be processed should be located, based on the set upward shift amount U. Asking.

From this Os, (xn, yn) is converted into polar coordinates centered on Os, and the processed data (srn, sΘn) (n = 1,2, ...)
.., N).

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

Next, the operation when measuring the template will be described.

The holes formed in the template are engaged with pins 2078a and 2078b of the template holder 2077 attached to the lid 2073 of the template holding unit 2000B, and are fixed to the template holder 2077 with set screws 2079. In this embodiment, when the lid 2073 is closed, the template holder 20 is closed.
Since the center of 77 is located on the OR and coincides with the rotation center of the tracing stylus part 2120, the geometric center of the template and the rotation center of the tracing stylus part 2120 coincide.

With the template set as described above, a trace switch of the input unit 4 described later is pressed. At this time, the rotation base
Reference numeral 2105 denotes a position at which the moving direction of the tracing stylus driving unit 2150 coincides with the y-axis direction, and the tracing stylus driving unit 2150 is at the reference position 0.

When the tracing stylus drive unit 2150 is moved in the opposite direction to the frame measurement, the pin 2132 implanted in the tracing stylus unit 2120 comes into contact with the center arm 2002, and when further moved, the center arm 2002, the right arm 2006, the left arm 2009 Push out. The roller 2159 moves from the guide portion 2160b of the fixed guide plate 2160 to 2160a, the stylus shaft 2122 is pushed up by the arm 2157, and the flange portion 2126a of the template measuring roller 2126 is maintained at a position above the upper surface of the template by a certain amount. It is. Probe drive section
After 2150 moves to FOL, solenoid 2064 is activated,
Center arm 2002, Right arm 2006, Left arm 20
09 is fixed, movable guide plate 2161 by solenoid 2164
Is moved to a predetermined position, and the tracing stylus drive unit 2150 is returned to the reference position. At this time, since the height of the guide portion 2160a of the fixed guide plate 2160 and the height of the guide portion 2162a of the movable guide plate 2161 are configured to be the same, the template measurement roller 2126 is kept on the template while maintaining a constant height. Move until it abuts. Subsequently, the pulse motor 2107 is rotated every predetermined number of unit rotation pulses. At this time, the tracing stylus unit 2120 moves on the guide shafts 2010a and 2010b according to the radius of the template, and the amount of movement is read by the potentiometer 2134. From the rotation angle の of the pulse motor 2107 and the read amount r of the potentiometer 2134, the shape of the template is (rn, Θn) (n = 1, 2,.
・, N).

From this measurement data (rn, Θn), the geometric center O is obtained in the same manner as in the frame measurement, and the FPD, PD,
The processing data is based on the inset I and the top U (sr
n, sΘn) (n = 1, 2,..., N).

(C) Unprocessed lens shape measuring unit (a) Configuration Fig. 11 shows the entire unprocessed lens shape measuring unit for detecting the curve value, edge thickness, etc. of the lens after grinding under predetermined conditions before grinding. FIG. The detailed configuration will be described with reference to FIGS.

FIG. 12 is a cross-sectional view of the shape measuring section 5 of the raw lens, and FIG.
The figure is a plan view.

The shaft 501 is rotatable by the bearing 502 on the frame 500,
A DC motor 503, photo switches 504, 505, and a potentiometer 506 are respectively assembled.

A pulley 507 is rotatable on the shaft 501 and a pulley 50
8, flanges 509 are respectively assembled.

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

The pulley 508 is provided with a spring 511 as shown in FIG.
It is assembled so that 2 is sandwiched. Therefore, when the spring 511 rotates together with the rotation of the pulley 507, the spring 511 has a spring force for rotating the pin 512 attached to the rotatable pulley 508, and the pin 512 is independent of the spring 511, for example, as indicated by an arrow. When rotated in the direction, a force is applied to return the pin 512 to its original position.

A pulley 513 is attached to a rotating shaft of the motor 503, and rotation of the motor 503 is transmitted to the pulley 507 by a belt 514 hung between the pulley 507 and the pulley 513.

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

The rotation of the pulley 507 causes the pulley 508 on which the pin 512 is mounted to rotate, and the pulley 521 is hung between the rotation shaft of the potentiometer 506 and the pulley 520 by the pulley.
The rotation of 508 is detected by potentiometer 506. 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 mounted on the measuring arm 527 by pins 525 and 526, respectively.
27 is attached to the flange 509.

The photo switch 504 detects the initial position of the measurement arm 527 and the measurement end position. The photoswitch 505 detects the relief positions of the feelers 523 and 524 and the measurement position with respect to the front refracting surface of the lens and the rear refracting surface of the lens, respectively. The measurement end position by the photo switch 504 coincides with the escape position of the rear refractive surface of the lens by the photo switch 505. FIG. 15 is a diagram showing the correspondence between the signals of the photoswitch 504 and the photoswitch 505.

As shown in FIG. 16, a shaft 529 having a micro switch 528 mounted thereon is disposed on the measuring arm 527, and a rotatable arm 531 having a rotatable feeler 530 is provided on the shaft 529. The position of the feeler 530 is detected by the micro switch 528.

The cover 533 prevents adhesion of grinding water or the like to the measuring device, and the sealing material 534 prevents entry of grinding water or the like from between the cover and the measuring device.

In the present embodiment, the third feeler 530 is provided so as to abut on the lens edge. However, when the lens is not suitable for processing, the feelers 523 and 524 also display abnormal data, so that the feeler 530 can be omitted.

(B) Measurement method First, the motor 503 controlled by the photo switch 505
To rotate the measuring arm 527 from the initial position to the clearance position of the refracting surface on the front side of the lens as shown in FIG. 17-1. At 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 with each other, and the feeler 530 has a positional relationship such that the feeler 530 contacts the lens edge.

Next, the lens LE moves in the direction of the arrow 535. The movement amount is controlled by the shape data or the lens shape data of the eyeglass frame to be framed after the lens processing. The lens moves in the direction of the arrow based on these data.

If the lens size does not deviate from the eyeglass frame shape data or the lens shape data, the feeler 530 contacts the lens edge, moves in the direction of the arrow 535, and the microswitch 528 detects it. When the lens size is off, a signal from the micro switch 528 is displayed on the display unit 3 indicating that grinding is impossible. When the microswitch 528 detects the movement of the feeler 530, the motor 503 is rotated so as to bring the feeler 523 into contact with the front refracting surface to measure the shape of the lens front refracting surface. The rotation amount is rotated to a position designed in consideration of the general thickness of the lens and the length of the feeler 530 in the edge direction. This state
These are 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 511 attached to the pulley 507 acts to bring the feeler 523 into contact with the front refracting surface.

Next, when the lens is rotated once around the chuck shafts 704a and 704b, the lens moves in the direction of the arrow 536 according to the shape data or the lens shape data of the spectacle frame, and the feeler 523
Moves in the direction of the arrow 537, and the amount of movement is detected by the potentiometer 506 via the amount of rotation of the pulley 508, and the lens front refraction surface shape is obtained. At the same time, whether or not the lens can be processed into a lens shape according to the above data is also measured by the microswitch 528, and this is displayed.

Thereafter, the carriage 700 is returned to the initial position, and the motor 503 is
Is further rotated to the position of the relief for the measurement of the rear refractive surface of the lens, and then the lens is moved to the measurement position. The amount of movement is measured by the feeler 524 while rotating the lens once, in the same manner as the measurement of the front refraction surface.

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

The input unit of the present embodiment includes various sheet switches,
Main switch 400 that controls power on / off,
It comprises a setting switch group 401 for inputting various types of processing information and an operation switch group 410 for instructing an operation method of the apparatus.

In the setting switch group 401, 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 material of the frame is cell or metal, and select a processing mode of flat processing or bevel processing Mode switch 404, an R / L switch 405 for selecting whether the lens to be processed is for the left eye or the right eye, and a far / near switch 40 for converting the upper / lower layout of the lens optical center and the distance / nearness of the PD value.
6, Input selector switch 4 to select the setting data change item
07, a + switch 408 and a-switch 409 for increasing / decreasing the data of the item selected by the input switch 407 are arranged.

The operation switches 410 include a start switch 411, a pause switch 412 also serving as a screen switching switch to a bevel simulation display, a switch 413 for opening and closing a lens check, a switch 414 for opening and closing a cover, and a switch 414 for finishing double sliding. And a next data switch 417 for transferring data measured by the lens frame and template shape measuring unit 2.

The display unit 3 is configured by a liquid crystal display,
A set value of processing information, a bevel position, a bevel simulation for simulating a fitting state between the bevel and the lens frame, a reference set value, and the like are displayed under the control of a main arithmetic control circuit described later.

FIG. 19 shows an example of a display screen. FIG. 19-1 shows a screen for setting lens processing information, and FIG. 19-2 shows a bevel simulation screen.

(3) Electric Control System of Entire Apparatus The electric control system of the present embodiment having the above-described mechanical configuration will be described.

 FIG. 20 is an electric block diagram of the entire apparatus.

The main operation control circuit is constituted by, for example, a microprocessor, and its control is controlled by a sequence program stored in the main program. The main operation control circuit can exchange data with an IC card, an optometry system device, etc. through a serial communication port, and exchanges data with the tracer operation control circuit of the lens frame and template shape measurement unit.
Perform communication.

The display unit 3, the input unit 4, and the audio reproducing device are connected to the main operation control circuit.

In addition, each photo switch unit such as photo switches 504 and 505 for measurement, a photo end switch for detecting a process end state, and micro switch units for cover opening / closing, processing pressure, and lens chuck are also connected to the main arithmetic control circuit. I have.

Potentiometer 506 for measuring the shape of the lens to be processed
Is connected to the A / D converter, and the converted result is input to the main operation control circuit. The measurement data of the lens which has been processed by the main processing control circuit is stored in the lens / frame data memory.

Carriage moving motor 714, carriage vertical motor 728,
The lens rotation shaft motor 721 is connected to a main processing circuit via a path motor driver and a pulse generator. The pulse generator is a device for receiving a command from the main arithmetic circuit and controlling how many pulses are output at a frequency of each Hz to each pulse motor, that is, the operation of each motor.

The processing pressure motor 733, the lens measurement motor 503, and each motor for opening and closing the cover are driven by a drive circuit instructed by the main operation control circuit.

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

Next, the lens frame and the template shape measuring unit will be described.

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

The tracer rotation motor 2107 is controlled by a tracer arithmetic control circuit via a pulse motor driver. Further, the tracer moving motor 2152, the frame fixed solenoid 2064, and the tracing stylus fixed solenoid 2164 are driven by respective drive circuits instructed by the tracer arithmetic control circuit.

The tracer operation control circuit is constituted by, for example, a microprocessor, and its control is controlled by a sequence program stored in a program memory.

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

(4) Operation of the Entire Device Next, the operation of the lens grinding device will be described based on the flowchart of FIG.

Step 1-1 After the main switch 400 shown in FIG. 21 is turned ON, first, the frame or the template is set on the frame or the template holder, and the trace is performed by the trace switch 416.

Step 1-2 The PD value and astigmatic axis of the wearer are input. For template measurement, also enter the FPD value. In addition, the perspective switch 406 sets whether the input PD is distant or near. The setting state is displayed on the display of the display unit 3. Here, after a distant PD is input in a state set to distant, if the distance is changed to near by the near / far switch 406, it is converted to a near PD by the following equation.

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

If the distance is changed after the near PD is input in the near state, it is converted to the far PD by the following formula.

Details of the conversion are described in JP-A-63-82621.

The upper and lower layouts are also set to the set values previously input in the above-described reference value setting for each of the near and far distances. If the worker wants to change the value,
The change can be made by a (+) switch 408 and a (-) switch 409. At this time, the PD can also be changed.

Step 1-3 Based on the radial information and the FPD value of the frame or template obtained in step 1-1 and the information of the PD vertical layout input in the previous step, the coordinates are converted to a new coordinate center by the above-described method, and a new coordinate is obtained. The radial information (rsδn, rsθn) is obtained and stored in the frame data memory.

Step 1-4: The operator judges the material of the lens to be processed, and determines whether the lens is a glass lens or a plastic lens.
2, the frame switch 403 is used to input whether the frame is metal or cell, the R / L switch 405 is used to input whether the processing lens is the right eye or the left eye, and the mode switch 404 is input whether the processing is flat or beveled. The lens processing size is set based on the set value previously input in the reference value setting for each of the eight combinations depending on whether the lens is plastic or glass, the frame is cell or metal, and the mode is bevel or flat.

To change the set value, press the (+) switch 40
8, can be changed by the (-) switch 409. If the R / L designation of the processing lens is the same as the measurement side at the time of frame measurement, the data is used as it is, but if different, the data is inverted left and right and used.

Step 1-5 The lens is chucked by rotating the motor 706 by the switch 413 for opening and closing the lens chuck. At this time, if the lens has directionality such as an astigmatic axis, chucking is performed with the axial direction directed toward 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.

Upon confirming that the start switch 411 has been pressed, the main arithmetic control circuit performs processing correction (grinding wheel diameter correction).

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

When the axis of astigmatism is other than 180 °, rsθn is offset by that difference, and that rsθ′n is used instead of rsθn.

Next, the radial information (rsδn, rsθn) is rotated about the machining center by a small arbitrary angle, and the same calculation as in the previous equation is performed.

The rotation angle of these coordinates is ξi (i = 1, 2, 3,..., N), and the coordinates are sequentially rotated 360 ° from ξi to ξn. The maximum value of L at each ξi is Li, and rsθn at that time is Θi. Also, (LiΘiΘi) (i = 1, 2, 3,... N) is set as processing correction information and stored in the frame data memory.

Step 2-1 If the designation in step 1-4 is the beveling mode, the process proceeds to step 2-2. If the designation is the flat mode, the process proceeds to step 3-1.

Step 2-2 When the beveling mode is designated, the main arithmetic control circuit rotates the lens rotating shaft mote 721 via the pulse generator and the pulse motor driver so that the lens rsθn is directed toward the grinding wheel rotation center. The shafts 704a and 704b are rotated.

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

Thereafter, the lens edge position on the line of the same diameter information is measured using the above-described unprocessed lens shape measuring mechanism. The front edge position of the lens obtained by this is rZn, and the rear edge position of the lens is l.
Zn. This is referred to as edge information (lZn, rZn) (n = 1, 2, 3, ...).
.. N) and store this in the frame data memory.

If it is determined that there is a portion where the lens outer diameter is smaller than the lens diameter, it is determined that a lens having a desired lens frame shape cannot be obtained, a warning is displayed on the display unit display, and execution of the subsequent steps is stopped. I do.

Step 2-3 A front curve and a rear curve are obtained from the edge information (lZn, rZn) obtained in step 2-2.

First, the radial information (rsδn, rsθn) is converted into rectangular coordinates (Xn, Yn).
Convert to Any four points (X ₁ , Y ₁ ), (X ₂ , Y ₂ ),
Each edge information (lZ ₁ , r ₃ ) of (X ₃ , Y ₃ ) and (X ₄ , Y ₄ )
First, the front curve and its center are obtained from (Z ₁ ), (lZ ₂ , rZ ₂ ), (lZ ₃ , rZ ₃ ), (lZ ₄ , rZ ₄ ).

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

a = D ₁ / D b = D ₂ / D c = D ₃ / D here, Next, the back curve and its center are obtained by replacing all lZ with rZ. A bevel curve is obtained based on these information.

The bevel curve is a curve that draws the apex of the outer V-groove processed for lens framing. Generally, it is desirable that the curve follows the front curve, but if the bevel curve is too steep or gentle, the curve There is inconvenience in inserting. Therefore, when the front curve value is within a certain width, the bevel curve forms the same curve as the front curve. The position of the top of the bevel is a position shifted a certain amount rearward from the edge position on the front surface of the lens. The center of the curve is placed on the line connecting the curve center of the front curve and the curve center of the rear curve.

If the bevel curve exceeds a certain width, the edge information (lZ
Based on (n, rZn), yZn is obtained from lZn + (rZn-lZn) R / 10 = yZn. At this time, if R = 4, the edge thickness is 4: 6.
It is equal to standing in the ratio of

Is the data if possible is curved along the front surface curve as (rsθn, ylZn), when it is impossible to bevel data data obtained as R = 4 as (rsθn, y ₄ Zn).

When the edge thickness is large, it may not be necessary to stand at a ratio along the front curve of the lens. At this time, the bevel data is set along the frame curve.

Step 2-4 The bevel shape obtained in the above step is displayed on the display unit 3.

On the display, the frame shape is displayed based on the radial information (rsδn, rsθn), and a rotation cursor 30 is displayed around the processing center. The bevel cross section 32 at the position where the cursor frame shape contacts is displayed on the left side of the panel. The cursor rotates to the right while pressing the (+) switch and to the left while pressing the (-) switch, and always displays the bevel cross section at that position.

When the rotation cursor is at the position indicated by the rim thickness measuring device mark 33, the rim position mark 31 is displayed at the upper left of the bevel section.

The position of the bevel is a position 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 confirming the bevel curve, the processing is started by starting the operation again with the start switch 400.

According to the settings in Steps 1-4, the carriage 714 is moved by a motor so that the lens to be processed is placed on the rough grinding wheel 60b for plastic if the lens is plastic or on the rough grinding stone 60a for glass if the lens is glass.

Read from the frame data memory the distance L between the grinding wheel rotational center and the lens processing center by a motor after rotating the grinding wheel machining correction information (Li, ξi, Θi) is moved to L ₁ of the. When that time processing end photoswitches 727 rotates the angle waiting to be ON until xi] ₂ is at the same time moving the L to L _2.

The above operation is continuously performed (Li, ξi) (i = 12,3 ...)
N). This allows the lens to obtain the radial information (rs
δn, rsθn).

Step 2-7, 2-8, 2-9 After the lens is detached from the grindstone by the motor 728, the lens is moved onto the beveled grindstone by the carriage moving motor 714.

Next, the bevel processing data YZi is obtained by converting the processing correction information (Li, ξi, Θi) and the bevel data (rsθn, ylZn) or (rsθn, ykZn).

First, rsθn that satisfies Θi = rsθn is converted into i = 1,2,3,.
... Obtained in the order of N. The bevel position ylZn or ykZn with respect to rsθn at that time is sequentially selected, converted into Zi in the form of bevel processing information (LiZiZi), and stored in the frame data memory again.

Based on this information, bevel motor 728
21 processes the ξi while the motor 714 simultaneously controls the Zi in the order of i = 1, 2, 3,... N.

Step 3-1 When the grinding mode is the flat processing mode, the lens to be processed comes on the rough grinding wheel 60a for glass if the lens is plastic and the rough grinding stone for plastic 60b is glass if the lens is plastic according to the settings in step 1-4. The carriage is moved to the motor 714. After the grindstone is rotated, the motor 728 reads the distance L between the grindstone rotation center and the lens machining center from the frame data memory to the machining correction information (Liξ
Move to Li in iΘi). When that time processing end photoswitches 727 rotates the angle waiting to be ON until xi] ₂ is at the same time moving the L to L _2. The above operation is continuously performed based on (Liξi) (i = 1, 2, 3,... N). Thereby, the lens is processed into the shape of the radial information (rsδn, rsΘn).

Step 3-2, 3-3 After the lens is released from the grindstone by the motor 728, the lens LE is beveled by the carriage moving motor 714 and the beveled grindstone 60c.
Move over the flat part of. Here, the outer periphery of the lens LE is finish-processed by the same method as in step 2-8 and thereafter.

Such a description is a principle explanation of the operation, and it goes without saying that various changes can be made depending on the degree of automation.

Although the 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 under the same technical idea as the present invention, and these also include the present invention. Needless to say.

[Effects of the Invention] According to the present invention, it is possible to obtain a rim thickness at a predetermined position or the entire circumference of an eyeglass frame, so that it is easy to set a bevel position at which an optimum fitting state can be obtained according to an individual frame and a lens type. Is obtained.

Further, since the rim thickness of the frame is obtained and the correction is performed taking this into consideration, the grinding process can be completely automated.

[Brief description of the drawings]

1 is a perspective view showing the overall configuration of a lens grinding apparatus according to the present invention, FIG. 2 is a cross-sectional view of a carriage, FIG. 3-a is an arrow view A showing a carriage driving mechanism, and FIG. Is the third
FIG. 4 is a cross-sectional view taken along line BB of FIG. A, FIG. 4 is a diagram for explaining the principle of the apparatus, FIG. 5 is a perspective view showing a lens frame and a template shape measuring unit according to the present embodiment, and FIG. Frame holder 2000A
FIG. 6-2 is a detailed view of the holding section, FIG. 6-3 is a view for explaining a mechanism for holding the lens, and FIG. 6-4 is a housing 2001.
Fig. 6-5 is a diagram illustrating a rim thickness measuring mechanism, and Fig. 6-6 is a diagram illustrating a frame fixing mechanism. FIG. 7-1 is a plan view of the measuring unit, FIG. 7-2 is a sectional view taken along line CC of FIG. 7, FIG.
FIG. 4 is an EE cross-sectional view. Figures 8-1 and 8-2
FIGS. 9A and 9B are diagrams illustrating the measuring method, FIGS. 9A and 9B are diagrams illustrating the movement of the tracing stylus in the vertical direction, and FIG. 10 is a diagram illustrating the coordinate conversion. FIG. 11 is a schematic diagram of the entire shape measuring unit of the raw lens, FIG. 12 is a cross-sectional view of the shape measuring unit of the raw lens, and FIG. 13 is a plan view of the shape measuring unit of the raw lens. FIG. 14 is an explanatory view showing the operation of the spring and the pin. FIG. 15 is a diagram showing the correspondence between the signals of the photoswitch 504 and the photoswitch 505, FIG. 16 is a diagram for measuring the lens radius, FIGS. 17-1, 17-2 and 17-3. FIG. 4 is a diagram illustrating a measurement operation of a measurement unit. FIG. 18 is an external view of a display unit and an input unit of the present embodiment, and FIG. 19 is an example of a display screen.
FIG. 1 shows a screen for setting lens processing information.
FIG. 2 shows a screen of the bevel simulation. FIG. 20 is an electric block diagram of the entire apparatus. FIG. 21 is a flowchart for explaining the operation of the apparatus. 2 ... Lens frame and template shape measuring device 3 ... Display unit 4 ... Input unit 5 ... Lens shape measuring device 6 ... Lens grinding unit 7 ... Carriage unit

Continuation of the front page (51) Int.Cl. ⁶ identification code FI G02C 13/00 G02C 13/00 (58) Fields investigated (Int.Cl. ⁶ , DB name) G01B 5 / 20,5 / 06 G01B 21 / 20,21 / 08 B24B 9/14 G02C 13/00

Claims (7)

(57) [Claims] 1. A spectacle frame tracing device for measuring the shape of a spectacle frame, wherein a thickness detecting means for detecting a thickness between a rim front edge of the spectacle frame and a center of a rim groove is provided. apparatus. 2. The rim leading edge position measuring means for measuring the position of the rim leading edge, comprising: a contact contacting the rim leading edge; and a contact inserted into the rim groove. Rim groove center position measuring means for measuring the position of the center of the rim groove, and calculating the distance between the rim leading edge and the center of the rim groove based on the measurement results of the rim groove center measuring means and the rim leading edge position measuring means. Frame tracing apparatus, comprising: an arithmetic means for performing the operation. 3. The rim groove center position measuring means according to claim 2, wherein the rim groove center position measuring means is a displacement measuring means for measuring a displacement in a direction perpendicular to the radial direction by using a measuring element for measuring a moving radius of the spectacle frame. An eyeglass frame tracing device, characterized in that: 4. A spectacle frame tracing device according to claim 1, wherein said thickness detecting means measures a thickness between a front edge of the rim and a center of the rim groove at a predetermined position or at an entire circumference. 5. A spectacle frame tracing device according to claim 4, wherein the thickness detecting means includes a measuring pin provided on the means for holding the spectacle frame, and measures the amount of movement. 6. A spectacle lens grinding machine for processing an edge of a spectacle lens according to a shape of a spectacle frame, a first input means for inputting a shape of the spectacle frame, an edge position of the spectacle lens based on the input shape. , A second input means for inputting information on the arrangement of the spectacle lens with respect to the spectacle frame, a thickness detecting means for detecting a thickness of a rim front edge of the spectacle frame and a center of the rim groove, the first input A spectacle lens grinding machine, comprising: a bevel determining means for determining a bevel to be formed on the spectacle lens based on each information of the means, the second input means, the edge measuring means and the thickness detecting means. 7. A bevel determining means according to claim 6, wherein said calculating means calculates a bevel position to be formed on the spectacle lens by a predetermined method, and a display means for displaying the calculated bevel position. A spectacle lens grinding machine, characterized by having a changing means for changing a bevel position.