JP2729788B2 - Gazuri machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001]

[0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ball mill which grinds a lens so as to fit into an eyeglass frame.

[0003]

[0002]

[0004]

2. Description of the Related Art In order to fit a lens into a spectacle frame, there has been known a balling machine which performs a grinding process so that a bevel for supporting a lens in a frame groove of the spectacle frame is formed on a peripheral portion of the lens.

Points to be noted in beveling the lens are the bevel apex position and the bevel curve at the edge position after the lens processing according to the frame shape of the spectacle frame.

[0006]

[0003]

[0007]

However, the position of the bevel apex and the formation of the bevel curve in the beveling process largely depend on the experience and intuition of the processor. Required skill.

An object of the present invention is to provide a ball mill which can obtain an optimum bevel in accordance with a shape of an eyeglass frame, an edge position after lens processing, and the like from a plurality of bevel forming methods.

[0009]

[0004]

[0010]

Means for Solving the Problems In order to solve the above problems, the present invention is characterized by having the following configuration. (1) In a ball milling machine for grinding a lens so as to fit into an eyeglass frame, shape data input means for inputting the shape data of the eyeglass frame, and layout data such as a pupil distance. Layout data input means for inputting, a tracing stylus for detecting the positions of the front and rear surfaces of the lens to be processed, edge detecting means for obtaining the edge position after lens processing based on the shape data input means, Storage means for storing a plurality of bevel forming methods relating to a curve and a position based on shape data input means and the edge detection means; and memory means for storing the data based on detection data of the edge detection means. Selecting means for automatically selecting one bevel forming method from the plurality of bevel forming methods.

[0011]

(2) At least one of the plurality of bevel forming methods stored in the storage means of (1) has a step of dividing at a predetermined ratio by the edge position information by the edge detection means. And

[0012]

[0006]

[0013]

[0007]

[0014]

[0008]

[0015]

[0009]

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 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 portion of the device.

A display unit 3 for displaying measurement results, calculation results, and the like in characters or graphics is arranged in front of the display unit, and an input unit 4 for inputting data and instructing the apparatus is arranged.

At the front of the apparatus 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 grindstone 60 composed of a rough grindstone 60a for a glass lens, a rough grindstone 60b for a plastic, and a bevel and flat processing 60c is rotatably mounted on a 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. Therefore, when the motor 65 rotates, the grindstone 60 rotates.

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

[0023]

(2) Structure 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. 3A is an A-view diagram showing the carriage driving mechanism, and FIG. 3-B is a BB cross-sectional view.

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, 703 having the same number of teeth are provided on the carriage shaft 702, respectively.
c is fixed at the left end, the right end, and between them.

Lens rotation shafts 704a and 704b are coaxially and rotatably supported on the carriage 700 in parallel with the shaft 701 and at a constant distance. Lens rotation axis 704
b is rotatably supported by a rack 705, and the rack 705 is movable in the axial direction. The rack 705 can be moved in the axial direction by a pinion 707 fixed to the rotating shaft of a motor 706. Rotating shaft 704a,
704b. Note that the lens rotation shaft 704a,
704b has pulleys 708a, 70
8b, which are attached to the timing belt 7
09a and 709b are connected to pulleys 703c and 703b.

An intermediate plate 710 is provided on the left side of the carriage 700.
Are rotatably fixed. The intermediate plate 710 has two cam followers 711, which are the shaft 701.
The guide shaft 712 fixed to the base 1 is sandwiched in a positional relationship parallel to the above. The intermediate plate 710 has a rack 713
Are engaged with a pinion 715 attached to the rotating shaft of a carriage left / right moving motor 714 fixed to the base 1 in a positional relationship parallel to the shaft 701. With these structures, the motor 714 moves the carriage 700 to the shaft 7.
01 in the axial direction.

A driving plate 716 is provided at the left end of the carriage 700.
Is fixed, and a rotary shaft 717 is attached to the drive plate so as to be rotatable in parallel with the shaft 701. At the left end of the rotating shaft 717, a pulley 718 having the same number of teeth as the pulleys 708a and 708b is attached.
03a and the timing belt 719.

A gear 720 is attached to the right end of the rotating shaft 717, and the gear 720 meshes with a gear provided on the motor 721. When the motor 721 rotates, the gear 72
0, the pulley 718 rotates, and the timing belt 71
9, the carriage shaft 702 rotates, which causes the pulleys 703b and 703c and the timing belt 70 to rotate.
The lens chuck shafts 704a and 704b are rotated via the pulleys 9a and 709b and the pulleys 708a and 708b.

The block 722 includes a driving plate 716 and a rotating shaft 7.
17, and is rotatably fixed to the motor 72.
1 is fixed to the block 722.

A shaft 723 is fixed to the intermediate plate 710 in a direction parallel to the shaft 701.
3, a correction block 724 is rotatably fixed. The round rack 725 is arranged so as to be slidable in parallel with the shortest line segment connecting the axis of the rotation shaft 717 and the shaft 723, and penetrating 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 position where the correction block 724 abuts.

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 state of grinding of the lens can be known.

The motor 728 fixed to the block 722
The pinion 730 fixed to the rotating shaft 729 is engaged with the round rack 725, so that the center 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.

[0034]

The distance (BC) between the axis of rotation of the grinding wheel B and the shaft 701 is α, and the lens chuck shafts 704 a and 70
The distance (AC) between the shaft 4b and the shaft 701 is β, the distance between the lens chuck shafts 704a and 704b and the center of rotation of the grindstone is γ, the angle between α and β is θ, and the axis of the shaft 723 and the shaft 701 is The distance (C-D) is α ′, the rotation axis 7
(CE) distance β ′, α between the shaft 17 and the shaft 701
The angle between 'and β' is defined as θ '.

FIG. 4 schematically shows the positional relationship.

Α, α ′, β, and β ′ are invariable, and the center of rotation of the grindstone and the center points of the shafts 701 and 723 are invariant on the plane of FIG.
The center points of the shafts 04a and 704b and the center point of the rotating shaft 717 rotate about the shaft 701 without changing the relative positional relationship.

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

With such a structure, the block 722 to which the motor 721 for rotating the pulley 718 that rotates about the rotation shaft 717 is fixed, follows the change in the CED when γ ′ is changed. Rotate around.

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

While rotating the pulley 718, the motor 72
8, when γ ′ and γ are changed, the rotation angle of the pulley 718 when the line segment ED is used as a reference line is equal to the rotation angle of the lens axis when the line segment AB is used as a reference line. The rotation of the motor 721 and the lens shafts 704a and 704b also has a linear correlation. In other words, the distance between the grinding wheel axis and the lens axis changes with a correlation with the output shaft rotation angle of the motor 728, and the lens axes 704a and 704b using the line segment AB as a reference line rotate the output shaft rotation of the motor 721. Rotate with a linear correlation to the angle.

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 can wind up the wire 732. With this, the grinding pressure of the grindstone 60 of the lens LE can be changed.

[0042]

(B) Lens frame and template shape measuring section (tracer) (a) Configuration The configuration of the lens frame and template shape measuring section 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 this embodiment. The main unit is incorporated in the main body, and roughly includes two parts, namely, a frame and template holding unit 2000 for holding the frame and template, and a measuring unit 2100 for digitally measuring the shape of the lens frame and template of the frame. It is composed of The frame and template holder 2000 comprises two further parts, the frame holder 20
00A and a template holding unit 2000B.

[0044]

[Frame Holder] Frame Holder 200
In Figure 6-1 showing a 0A, defines a geometrical substantially central point of the lens frame in the case of setting the spectacle frame in the frame holding section 2000A reference point O _R, as O _L, a reference line a straight line passing through the two points And

The frame holding unit 2000A is a housing 2001
Having. The center arm 2002 has guide shafts 2003a and 2003b attached to the surface of the housing 2001.
The center arm 200 is slidably mounted on the
The second tip O _R, frame押工20 at the same intervals as O _L
04, 2005.

Similarly, the right arm 2006 is mounted on the guide shafts 2007a and 2007b.
09 are slidably mounted on the guide shafts 2010a and 2010b, respectively.
The frame pusher 2008 is rotatably supported at the tip of the frame 06, and the frame pusher 2011 is rotatably supported at the tip of the left arm 2009.

The center arm 2002 is used for frame pushing 2
004,2005 is O _R, O _L way through the slides to the reference line and the vertical direction, light arm 2006 frame押工2008 passes through the O _R, left arm 2009 frame押工2011 O _L 30 ° with reference line as if passing through
Sliding in an inclined direction.

Referring to FIG.
4, 2005, 2008 and 2011 are two slopes (2012a and 2012b) intersecting each other, (201)
4a, 2014b), (2016a, 2016b),
(2018a, 2018b), and ridge lines 2013, 2015, 2017, 201 formed by two slopes respectively.
9 is on the same plane (measurement surface),
The rotation axes 8, 2011 are also on this measurement plane.

A semicircular frame pusher 2020 is slidably mounted on the center arm 2002 on guide shafts 2021a and 2021b attached to the center arm 2002. One end of the spring 2022 is hung on the pin 2023a planted in the center arm 2002 and the other end is hung on the pin 2023b planted in the frame pushing 2020 so that the frame pushing 2020 is constantly pulled toward the center arm. I have.

[0050]

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

A pulley 2024 is provided on the back of the housing 2001.
a, 2024b, 2024c, and 2024d are rotatably supported, and a wire 2025 is hung on pulleys 2024a to 2024d.
a, 2029a, which are fixed to a pin 2026 planted in the center arm 2002 and a pin 2027 planted in the light arm 2006, projecting to the back surface.

Similarly, pulley 2 is mounted on the back of housing 2001.
030a, 2030b, 2030c, and 2030d are rotatably supported on shafts, and wires 2031 are hung on pulleys 2030a to 2030d.
Through the holes 2028b and 2029b, are fixed to a pin 2026b planted in the center arm 2002 and a pin 2032 planted in the left arm 2009 protruding from the rear surface. Further, on the back surface of the housing 2001 of the center arm 2002 constantly O _R, pull the O _L direction constant torque spring 2033 is mounted to the drum 2034 that is rotatably supported on the rear surface of the housing 2001, a constant torque spring 2033 One end is fixed to a pin 2035 implanted in the center arm 2002.

A claw 2036 is implanted in the center arm 2002. When the frame is not held, the center arm 2002 comes into contact with the microswitch 2037 attached to the back surface of the housing 2001, and the frame is held. Judge.

A rim thickness measuring unit 2040 for measuring the thickness of the rim of the frame is incorporated in the left arm 2009.

A pulley 2042 is fixed to the rotating shaft 2041 of the frame pushing 2011, and the frame pushing 2
A pulley 2043 that rotates integrally with 011 and rotates independently of the rotation of the frame pusher 2011 is supported on the rotating shaft 2041, and a rim thickness measuring pin 2044 is implanted on the pulley 2043. .

Further, a hollow rotary shaft 2045 is rotatably supported by the left arm 2009, and a potentiometer 2046 is provided at one end and a pulley 2047 is provided at the other end.
Is installed. Pulley 2042 and pulley 20
47 is a wire 20 having both ends fixed to each pulley.
49, the potentiometer 2046 and the frame pusher 2011 always rotate in the same direction in conjunction with each other.

[0057]

In FIG. 6-5, one end of the wire 2050 is fixed to the pulley 2043, and the
48, and the other end is hung on a pin 2052 implanted in the left arm 2009 via a spring 2051, and 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 so that it comes into contact with the front surface of the rim when measuring the lens frame shape. Thus, the vertical position of the rim front surface can be detected. 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 provided on a housing 2001.
Is rotatably mounted on a shaft 2063 mounted on the pressing plate 2061, and one end of a sliding shaft of a solenoid 2064 mounted on the housing 2001 is mounted on 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 implanted in the housing 2001.
2 pulls the push plate 2061 in a direction not to contact the center arm 2002. When the solenoid 2064 operates and pushes the push plate 2061 against the valve 2065, the brake rubber 2062 comes into contact with the center arm 2002, and the right arm 2006 and the left arm 200 move in conjunction with the center arm 2002 and the center arm 2002.
9 is fixed.

[0060]

[Template Holder] In FIGS. 5 and 6A, the template holder 2000B is supported by columns 2071a, 2071b, 2071c, and 2071d planted in a housing 2001. The substrate 2072 is a support 2071a.
To 2071d. Lid 2073 is Lid 2
The shafts 2074a and 2074b implanted in the substrate 2
The bearing 2075a and 2075b formed on the base plate 2072 are engaged with each other and are rotatably mounted on the substrate 2072. The substrate 2072 is provided with a hole sufficient for inserting and removing the spectacle frame into and out of the frame holding unit. A transparent window 2076 is formed in the lid 2073, and a template holder 2077 is fixed to the center of the window 2076. Template holder 20
77 have pins 2078a and 2078b implanted therein, and holes formed in the template and pins 2078a and
8b is engaged, and the template is fixed to the template holder 2077 with the set screw 2079. The center of the template holder 2077, with the lid 2073 is closed, and is configured so as to be positioned on O _R.

[0061]

[Measurement Unit] Next, the configuration of the measurement unit 2100 will be described with reference to FIG. FIG. 7A is a plan view of the measuring unit, and FIG.

The movable base 2101 has a shaft hole 2102
a, 2012b and 2102c are formed,
001 is slidably supported by shafts 2103a and 2103b attached to 001. A lever 2104 is implanted in the movable base 2101.
By sliding the movable base 2101 by
The rotation center of the rotation base 2105, O _R on the frame and template holding portion 2000 is moved to the position of the O _L. A rotatable base 2105 having a pulley 2106 is rotatably supported on the movable base 2101. Pulley 2
A belt 2109 is stretched between the motor 106 and a pulley 2108 attached to a rotation shaft of a pulse motor 2107 attached to the movable base 2101, whereby the rotation of the pulse motor 2107 is transmitted to the rotation base 2105.

As shown in FIG. 7C, four rails 2110a, 2110b and 211 are provided on the rotating base 2105.
0c and 2110d are attached, and this rail 21
A tracing stylus 2120 is slidably mounted on 10a and 2110b. A shaft hole 2121 is formed in the tracing stylus portion 2120 in the vertical direction, and a tracing stylus shaft 2122 is inserted into the shaft hole 2121.

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 an 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. .

At the lower part of the arm 2124, a cylindrical template measuring roller 2126 abutting on the edge of the template is rotatably supported. Further, 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.

A pin 2128 is provided below the tracing stylus shaft 2122.
Is implanted in a ring 2127 rotatably attached to the tracing stylus shaft 2122, and the movement of the pin 2128 in the rotation direction is restricted by the elongated hole 2129 formed in the tracing stylus portion 2120. 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 provided at the lower end of the tracing stylus shaft 2122.
Are rotatably supported. A claw 2132 is implanted in the tracing stylus 2120.

A pin 2133 is implanted in the tracing stylus 2120, and a pulley 2135 is mounted on a shaft of a potentiometer 2134 mounted on the rotating base 2105. Pulley 213 on rotating base 2105
6a and 2136b are rotatably supported on the shaft,
133 is fixed to a wire 2137
6a and 2136b, and is fixed to the pulley 2139. As described above, the movement amount of the tracing stylus 2120 is detected by the potentiometer 2134.

Further, the tracing stylus part 2 is
A constant torque spring 2140 that constantly pulls 120 toward the distal end side of the arm 2124 is attached to a drum 2141 that is rotatably supported on a rotation base 2105, and one end of the constant torque spring 2140 is implanted in the probe 2120. Pin 2142.

Rail 2110 on rotating base 2105
c, a probe driving unit 2150 is slidably mounted on 2110d. The pin 21 is attached to the probe driving unit 2150.
A pulley 2153 is attached to a rotating shaft of a motor 2152 attached to the rotating base 2105. Pulley 215 on rotating base 2105
4a and 2154b are rotatably supported, and the pin 2
The wire 2155 fixed to the pulley 151
4a and 2154b, and is fixed to a pulley 2153. Thus, the rotation of the motor is transmitted to the tracing stylus drive unit 2150.

The tracing stylus drive section 2150 includes a constant torque spring 2
The probe 140 is in contact with the tracing stylus portion 2120 pulled toward the tracing stylus driving portion 2150 by the
By moving 50, tracing stylus portion 2120 can be moved to a predetermined position.

Further, the tracing stylus drive section 2150 has an arm 2157 at one end which is in contact with a roller 2131 pivotally supported at the lower end of the tracing stylus shaft 2122, and the other end rotatably supports the roller 2159. Shaft 2156 with arm 2158
Are rotatably supported. One end of the torsion spring 2166 is connected to the arm 2157 in the direction in which the roller 2159 contacts the fixed guide plate 2160 fixed to the rotation base 2105.
And the other end is fixed to the tracing stylus driving unit 2150. When the tracing stylus driving unit 2150 moves, the guide plate 2
At 160, the roller 2159 moves up and down.

The shaft 2156 rotates when the roller 2159 moves up and down, and the arm 2157 fixed to the shaft 2156 also moves
The tracing stylus shaft 2122 is moved up and down by rotating about 56.
A shaft 2163 is rotatably attached to the rotation base 2105, and the movable guide plate 21
61 is fixed. One end of a sliding shaft of a solenoid 2164 attached to the rotation base 2105 is attached to a movable guide plate 2161. One end of the spring 2165 is hung on the rotation base 2105, and the other end is a movable guide plate 2161.
And is always pulled to a position where the roller 2159 and the guide portion 2162 of the movable guide plate 2161 do not come into contact with each other. The movable guide plate 21 is operated by the solenoid 2164.
When the 61 is lifted, 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 comes into contact with the guide portion 2162 and can move along the guide portion 2162.

[0074]

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

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

The user selects which of the left and right sides of the lens frame of the glasses frame 500 to measure, and moves the measuring unit 2100 to the side to be measured by the lever 2104 fixed to the movable base 2101.

Next, the frame pusher 2020 is pulled forward,
The distance from the center arm 2002 is sufficiently widened. The front part of the eyeglass frame is frame pressed 2004, 20
05 slope 2012a, 2012b, 2014a, 20
14b, the frame pushing 2020 is returned,
Make contact with the center of the glasses frame. Thereafter, while pushing down the center arm 2002 and pressing down the rim thickness measuring pin 2044 at the rim of the glasses frame, the slopes 2016a and 201 of the frame pushing 2008 and 2011 are pushed down.
6b, 2018a, 2018b are brought into contact with the left and right rims.

In this embodiment, the frame pressing 200
4,2005,2008,2011 are interlocked, O _R by a constant torque spring 2033, pulled in a direction toward the O _L, the frame押工2020 spring 2022,
Since it is pulled in the direction of the center arm, frame pushing 2004, 2005, 2008, 2011, 2020
, The lens frames are respectively held by the forces in three directions toward the geometric center of the lens frame, and the center position of the frame is set to O by the frame pushing 2020.
_R, it is held at an intermediate point of the O _L. In addition, frame pushing 2
008, 2011 are ridgelines 201 of four frame pushing works
3, 2015, 2017, and 2019, the center of the bevel groove of the lens frame is frame pressing 2
004, 2005, 2008, 2011 are always held in the measurement plane at the center positions.

In FIG. 8A, the rim portion of the lens frame pushes down the rim thickness measuring pin 2044. When the bevel groove is parallel to the measurement surface, the slope 201 of the frame pusher 2011 is used.
8a, 2018b based on the ridgeline 2019 created by
The movement amount of the rim thickness measuring pin 2044 can be detected by the potentiometer 2046.

In FIG. 8B, 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 also inclined by the same amount as 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 is used to determine an optimum bevel position so that the rim of the frame and the front refraction surface of the lens are at appropriate positions.

[0082]

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 FIG. 9, the roller 2159 of the tracing stylus drive unit 2150 is at the reference position O, and the pulse motor 2107
Is rotated by a predetermined angle, and the rotation base 2105 is turned 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 driving unit 2150 is moved to the frame
When the movable guide plate 2160 is moved in the direction of
161 to the guide portion 2162b, and the stylus shaft 212
2 is pushed up by the arm 2157, and the bevel tracing stylus 2125 is kept at the height of the measuring surface.

When the tracing stylus drive unit 2150 further moves, the bevel tracing stylus 2125 is inserted into the bevel groove of the lens frame, the tracing stylus unit 2120 stops moving at FR, and the tracing stylus driving unit 2150 moves to the FRL and stops. I do. 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. Movement amount is potentiometer 21
Read by 30. From the rotation angle （of the pulse motor 2107, the reading amount r of the potentiometer 2134 and the reading amount z of the potentiometer 2130, the lens frame shape is (r, Θ, z) (n = 1, 2,..., N). It is measured as The measured data (r, Θ, z) is converted to polar coordinates −
Arbitrary 4 of data (x, y, z) after orthogonal coordinate conversion
The points (x ₁ , y ₁ , z ₁ ), (x ₂ , y ₂ , z ₂ ), (x
_{3, y 3, z 3)} , (x 4, y 4, z 4) from obtaining the frame curve C _F (calculation formula lens curve Determination of the same).

[0086]

In FIG. 10, (x _n , y _n , z _n )
The x, y components (x _n, y _n) from the measurement point A having the maximum value in the x direction (x _a, y _a), the measurement point B with the minimum value of the x-axis direction (x _b, y _b), y-axis direction of the measurement point C (x _c having the maximum value, y _c) and y the measurement point having the minimum value of the axial D (x _d, select y _d), the geometry of the lens frame Center O _F (x _F , y _F )

[0087]

(Equation 1) From the known center of the frame.
From the rotation center O ₀ of 20 (x _0, y ₀₎ deviation amount of the distance L and O _0, O _F up ([Delta] x, [Delta] y), 1/2 of the lens frame geometric center distance FPD is

[0088]

(Equation 2) Asking.

Next, the pupil distance P set by the input unit 4
From D, the inset I

[0090]

(Equation 3) And the position O _s (x _s , where the optical center of the lens to be processed should be located, based on the set upward amount U.
y _s ),

[0091]

(Equation 4) Asking.

[0092] converted from the _{O s (x n, y n} ) of the polar coordinates around the O _s, a processed data (s r _n, s
Θ _n ) (n = 1, 2,..., N).

In the apparatus of this embodiment, the shapes of the left and right lens frames can be measured, respectively, or the shape of one of the left and right lens frames can be measured, and the other data can be inverted.

[0094]

[Measurement of Template Shape] Next, the operation for measuring a template will be described.

The pins 2078a and 278 of the template holder 2077 attached to the lid 2073 of the template holding unit 2000B
The hole formed in the template is engaged with 078b, and fixed to the template holder 2077 with a set screw 2079. In this embodiment the closing lid 2073, the center of the template holder 2077 is positioned on the O _R, designed to reduce coincides with the center of rotation of the gauge head portion 2120, and the geometric center of the template measurement The rotation centers of the subunits 2120 match.

With the template set as described above,
The user presses a trace switch of the input unit 4 described later. At this time, the rotation base 2105 is at a position where the moving direction of the tracing stylus driving unit 2150 and the y-axis direction coincide with each other.
0 is at the reference position O.

When the tracing stylus driving unit 2150 is moved in the direction opposite to the direction of the frame measurement, the pin 2132 implanted in the tracing stylus unit 2120 comes into contact with the center arm 2002,
When further moved, the center arm 2002, the right arm 2006, and the left arm 2009 are pushed open. The roller 2159 is a guide portion 2160b of the fixed guide plate 2160.
To 2160a, and the tracing stylus shaft 2122 moves to the arm 2
157, 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. After the tracing stylus drive unit 2150 moves to the FOL, the solenoid 2064 operates and the center arm 20
02, the right arm 2006 and the left arm 2009 are fixed, and the movable guide plate 21 is
61 is moved to a predetermined position, and the tracing stylus drive unit 2150 is returned to the reference position. At this time, the guide portion 2160a of the fixed guide plate 2160 and the guide portion 2162 of the movable guide plate 2161
Since the height a is configured to be the same, 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 tracing stylus part 2120 moves the guide shaft 201 according to the radius of the template.
0a, 2010b, and the amount of movement is read by the potentiometer 2134. Pulse motor 2
107 from the read amount r of the rotation angle theta and potentiometer 2134, the template shape _{(r n, Θ n) (} n = 1,2,
.., N).

From the measurement data (r _n , Θ _n ), the geometric center O is obtained in the same manner as in the frame measurement, and based on the FPD, PD, inset I and inset U from the input unit. is processing data _{(s r n, s Θ n} ) (n = 1,2, ......
.., N).

[0099]

(C) Unprocessed lens shape measuring unit (a) Configuration FIG. 11 shows an unprocessed lens shape measuring unit for detecting the curve value, edge thickness, etc. of the lens after grinding under predetermined conditions before grinding. It is the whole schematic diagram. 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 unprocessed lens, and FIG. 13 is a plan view.

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

A pulley 507 is rotatably mounted on the shaft 501, and a pulley 508 and a flange 509 are respectively assembled.

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

A spring 511 is attached to the pulley 508 so as to sandwich the pin 512 as shown in FIG.
For this reason, when the spring 511 rotates together with the rotation of the pulley 507, the spring 511 becomes rotatable with the pulley 508.
Has a spring force to rotate the pin 512 attached thereto, and applies a force to return the pin 512 to the original position when the pin 512 rotates in the direction of an arrow, for example, independently of the spring 511.

A pulley 51 is provided on the rotating shaft of the motor 503.
3 is attached, and rotation of the motor 503 is controlled by the belt 514 hung between the pulley 5 and the pulley 5.
07.

The rotation of the motor 503 is controlled by the sensor switch 510 attached to the pulley 507.
4, 505 detect and control.

The rotation of the pulley 507 causes the pulley 508 with the pin 512 attached thereto to rotate, and the rotation of the pulley 508 is controlled by the rope 521 hung between the rotation shaft of the potentiometer 506 and the pulley 520. Is detected. At this time, pulley 5
The shaft 501 and the flange 509 rotate at the same time as the rotation of 08. The spring 522 is for keeping the tension of the rope 521 constant.

The feelers 523 and 524 have the pin 52
5, 526 are rotatably mounted on the measuring arm 527, respectively.
9.

The measuring arm 5 is operated by the photo switch 504.
27 and the measurement end position are detected. 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 and the relief position of the rear refractive surface of the lens by the photo switch 505 coincide with each other. 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 to which a microswitch 528 is mounted 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 microswitch 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 this embodiment, the third feeler 530 is provided so as to be in contact with the lens edge. However, when the lens is not suitable for processing, the feelers 523 and 524 often show abnormal data. It is possible to omit it.

[0113]

(B) Measurement method First, the motor 5 controlled by the photo switch 505
03 is rotated, and as shown in FIG.
27 is rotated from the initial position to the clearance position of the front refracting surface of the lens. 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 with each other, and the feeler 53
0 is set so as to be in contact with 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 microswitch 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 causes the feeler 523 to contact the front refracting surface in order to measure the shape of the lens front refracting surface.
To rotate. The rotation amount is rotated to a position designed in consideration of the thickness of the lens and the length of the feeler 530 in the edge direction. This state is shown in FIGS.
3 is shown.

When the feeler 523 moves to the position indicated by the two-dot chain line in the figure, the spring 51 mounted on the pulley 507 is moved.
The force of 1 acts to bring the feeler 523 into contact with the front refractive surface.

[0117]

Next, the lens chuck shafts 704a and 704b
When the lens is rotated by one rotation, the lens moves in the direction of arrow 536 according to the shape data or lens shape data of the spectacle frame, the feeler 523 moves in the direction of arrow 537, and the amount of movement is via the amount of rotation of the pulley 508. To obtain the shape of the lens front refraction surface. 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.

After that, the carriage 700 is returned to the initial position, the motor 503 is further rotated to rotate to the clearance position for measuring the rear refractive surface of the lens, and then the lens is moved to the measurement position. The feeler 52 while rotating the lens once.
In step 4, the amount of movement is measured in the same manner as the measurement of the front refraction surface.

[0119]

(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 are formed integrally.

The input section of this embodiment is composed of various sheet switches, a main switch 400 for controlling the power on / off, a group of setting switches 401 for inputting various processing information, and an operation switch for instructing an operation method of the apparatus. Group 4
It consists of 10.

The setting switch group 401 includes a lens switch 402 for indicating whether the material of the lens to be processed is plastic or glass, a frame switch 403 for indicating whether the material of the frame is cell or metal, and a processing mode of flat processing or bevel processing. Mode switch 404 for selecting whether the lens to be processed is for the left eye or for the right eye,
A far / near switch 406 for performing upper / lower layout of a lens optical center and a distance / nearness conversion of a PD value, an input changeover switch 407 for selecting a change item of setting data, and data of an item selected by the input changeover switch 407 A (+) switch 408 and a (-) switch 409 for increasing / decreasing are arranged.

The operation switch group 410 includes a start switch 411, a pause switch 412 which also serves as a screen changeover switch to a bevel simulation display,
Switch 413 for opening / closing the lens chuck, switch 414 for opening / closing the cover, switch 415 for double-sliding for finishing, tracing switch 416 for instructing lens frame and template trace, measurement of lens frame and template shape There is a next data switch 417 for transferring the data measured by the unit 2.

The display unit 3 is constituted by a liquid crystal display, and has a main arithmetic control circuit for setting values of processing information, a bevel simulation for simulating a bevel position, a fitting state of the bevel and the lens frame, a reference set value, and the like. Is displayed under the control of.

FIG. 19 shows an example of the display screen.
Is a screen for setting lens processing information.
Reference numeral 2 denotes a bevel simulation screen.

[0125]

(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 a microprocessor, for example, 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. Do.

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

The photo switches 504, 50 for measurement
5. Each photoswitch unit such as a photofinishing photoswitch for detecting a processing end state and microswitch units for cover opening / closing, processing pressure, and lens chuck are also connected to the main arithmetic control circuit.

The potentiometer 506 for measuring the shape of the lens to be processed is connected to an A / D converter, and the result of the conversion 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.

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

Working pressure motor 733, lens measuring motor 5
03 and each motor for opening and closing the cover are driven by a drive circuit which receives a command from the main operation control circuit.

The magnet motor 65 and the feed water 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 the main arithmetic control circuit.

[0134]

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

The outputs of the potentiometers 2130 and 2134 for measuring the shape of the lens frame and template and the potentiometer 2046 for measuring the rim thickness of the frame are connected to an A / D converter, and the converted result is used for tracer arithmetic control. Input to the 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. Also, a tracer moving motor 2152, a frame fixing solenoid 2064, a tracing stylus fixing solenoid 2164
Are driven by the respective drive circuits that receive instructions from the tracer operation control circuit.

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

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

[0139]

(4) Operation of the Entire Apparatus Next, the operation of the lens grinding apparatus will be described with reference to the flowchart of FIG. [Step 1-1] The main switch 400 in FIG.
After setting to N, the frame or template is first set on the frame or template holding unit, and tracing is performed by the trace switch 416. [Step 1-2] The PD value and astigmatic axis of the wearer are input. In the case of template measurement, the FPD value is also input. Further, the perspective switch 406 is used to set whether the input PD is distant or near. The setting state is displayed on the display of the display unit 3. Here, after inputting the distant PD in the state set to distant, the distance changeover switch 406
When it is changed to near, it is converted to near PD by the following formula.

Near PD = far PD × ((l−12) / (l + 13)) l is the required working distance, 12 is the distance between the corneal vertices of the Japanese, and 13 is the distance between the corneal vertex and the rotation point. means.

When a near PD is input and then changed to a far distance in the near state, it is converted to a far PD by the following equation.

Distance PD = Near PD × ((l + 13) / (l−12)) Details of the conversion are described in JP-A-63-82621.

Also, the upper and lower layouts are set to the set values previously input in the above-described reference value setting in the near and far directions respectively. When the operator wants to change the value, the (+) switch 408, the (-) switch 40
9 can be changed. At this time, the PD can also be changed. [Step 1-3] Based on the radial information and FPD value of the frame or template obtained in step 1-1 and the information on the PD vertical layout input in the previous step, coordinate conversion is performed to a new coordinate center by the above-described method. , New radial information (r _s
δ _n , r _s θ _n ) and store them in the frame data memory. [Step 1-4] The operator determines the material of the lens to be processed, determines whether the lens is a glass lens or a plastic lens by the lens switch 402, and determines whether the frame is metal or cell by the frame switch 403. An R / L switch 405 is used to input whether the processing is an eye or a left eye, and the mode switch 404 is used to input whether the processing is flat processing or bevel processing. 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, (+)
The change can be made by the switch 408 and the (-) switch 409. If the R / L designation of the processed lens is the same as the measurement side for frame measurement, the data is used as it is,
If they are different, the data is inverted left and right. [Step 1-5] The motor 706 is rotated by the lens chuck opening / closing switch 413 to chuck the lens. 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 grinding wheel.

[0145]

[Step 1-6, Step 1-7] If there is no abnormality in the above steps, the start switch 411 is pressed to start.

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

Here, point a represents the grinding wheel rotation center, point b represents the lens processing center, R represents the grinding wheel radius, LE represents the frame data, and L represents the distance between the grinding wheel rotation center and the lens processing center. Here, the radial information (r _s δ _n , r _s θ _n ) is read from the frame data memory, and the following calculation is performed.

[0148]

(Equation 5) Astigmatic axis except when the 180-degree offset only r _s theta _n the difference, using the r _s [theta] & apos _n instead of r _s θ _n.

[0149] then allowed to rotate around only processing center arbitrary angle minute the radius vector information _{(r s δ n, r s} θ n), performs pre same calculations and formulas.

The rotation angle of these coordinates is represented by ξ _i (i = 1, 2,...)
..., and N), rotates sequentially 360 degrees to xi] _i than xi] _n. The maximum value of L at each xi] _i L _i, the r _s theta _n at that time and theta _i. Also, (L _i , ξ _i , Θ _i ) (i
= 1, 2,..., N) as processing correction information and stored in the frame data memory.

[0151]

[Step 2-1] Here, step 1-4
Is the beveling processing mode in step 2-2.
If the mode is the flat machining mode, the process proceeds to step 3-1. [Step 2-2] When the bevel processing mode is specified, the main arithmetic control circuit rotates the lens rotation axis motor 721 via the pulse generator and the pulse motor driver,
lens axis 70 as r _s theta _n faces the grinding wheel rotation center direction
4a and 704b are rotated.

Next, the carriage is driven by the motor 714 in the same manner.
To move to the measurement reference position at the left end of the carriage stroke, and then rotate the motor 728 so that L
To the measurable position.

Thereafter, the lens edge position on the line of the radial information is measured by using the above-described unprocessed lens shape measuring mechanism. RZ _n it by the lens front edge position obtained, the lens rear surface edge position to LZ _n. This is referred to as edge information (lZ _n ,
rZ _n ) (n = 1, 2,..., N), and this is stored 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 issued on the display unit display, and the following steps are performed. Abort execution. [Step 2-3] Koba information (lZ _n, rZ _n) obtained in step 2-2 Request front curve and back curve from.

First, the radial information (r _s δ _n , r _s θ _n ) is converted into rectangular coordinates (X _n , Y _n ). Any four points (X
₁ , Y ₁ ), (X ₂ , Y ₂ ), (X ₃ , Y ₃ ),
Edge information (lZ ₁ , l ₄ ) of (X ₄ , Y ₄ )
Z ₁ ), (lZ ₂ , lZ ₂ ), (lZ ₃ , lZ ₃ ),
First, a front curve and its center are obtained from (lZ ₄ , lZ ₄ ).

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

[0157]

(Equation 6) here,

[0158]

(Equation 7) 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 drawn by the apex of the outer V-groove processed for lens framing. Generally, a curve along the front curve is desirable. Causes inconvenience to put in a frame. Therefore, the bevel curve forms the same curve as the front curve when the front curve value is within a certain width. 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.

[0160] edge information if the bevel curve exceeds the width which is (lZ _n, rZ _n) based on, seek yZ _n from _{lZ n + (rZ n -lZ n} ) R / 10 = yZ n. At this time, if R = 4, this is equivalent to setting the edge thickness at a ratio of 4: 6.

[0161] The data when possible is curved along the front surface curve as _{(r s θ n, y l} Z n), in the case impossible the data obtained as R = 4 (r _s θ _n , Y
₄ Z _n ) is the bevel data.

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

[0163]

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

The display shows the radial information (r _s δ _n , r
_s θ _n ), the frame shape is displayed, and the rotation cursor 30 is displayed around the processing center. 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 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.

The rotation cursor is positioned at the rim thickness measurement 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. [Steps 2-5 and 2-6] If there is no problem after confirming the bevel curve, the processing is started by starting the start switch 400 again.

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

After the grindstone is rotated, the distance L between the grindstone rotation center and the lens machining center is read from the frame data memory by the motor, and the distance L in the processing correction information (L _i , ξ _i , Θ _i ) is read.
Move to ₁ . Processing end photo switch 727
There is moved at the same time L is rotated an angle waiting to be ON until xi] ₂ to L _2.

The above operation is continuously performed (L _i , ξ _i ) (i
= 1, 2,..., N). Thus the lens is processed into the shape of the radius vector information _{(r s δ n, r s} θ n).

[0170]

[Steps 2-7, 2-8, 2-9] After the lens is separated from the grindstone by the motor 728, the lens is moved onto the beveled grindstone by the carriage moving motor 714.

Next, the processing correction information (L_i, Ξ_i, Θ_i)
And bevel data (r_sδ_n, R_sθ _n) Or (r
_sθ_n, YkZ_n) To bevel processing data YZ_iConvert
Ask for it.

The conversion is first performed by r _s θ _{n such} that Θ _i = r _s θ _n
Are obtained in the order of i = 1, 2,..., N. R at that time
sequentially selects the bevel position YlZ _n or YKZ _n for _s theta _n beveling information it as _{Z i (L i, ξ i} ,
Z _i ) and then store it again in the frame data memory.

The bevel determines the motor 728 based on this information.
The L _i of the motor 721 xi] _i of the motor 714, respectively Z _{i i} = 1,2, ........., processed while at the same time controlling the order of N. [Step 3-1] In the case where the grinding mode is the flat processing mode, if the lens is made of plastic by the setting in step 1-4, the roughing stone 60 for plastic is used.
c, if it is glass, the carriage is moved to the motor 714 so that the lens to be processed comes on the rough grinding wheel 60a for glass. After the grindstone is rotated, the distance L between the grindstone rotation center and the lens machining center by the motor 728 is read from the frame correction data (L _i , ξ _i , Θ _i ) in the frame correction data.
Move to _i . 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 (L
_i , ξ _i ) (i = 1, 2,..., N).
Thus the lens is processed into the shape of the radius vector information _{(r s δ n, r s} θ n).

[0174]

[Step 3-2, 3-3] Motor 728
After the lens is separated from the grindstone, the lens LE is moved by the carriage moving motor 714 onto the flat portion of the beveled grindstone 60c. 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 one embodiment of the present invention has been described above, it is obvious to those skilled in the art that the embodiment can be easily modified under the same technical concept as the present invention, and these also include the present invention. It goes without saying that it is a thing.

[0177]

[0034]

[0178]

According to the present invention, a good bevel can be obtained automatically without the skill of a processor.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an overall configuration of a lens grinding device according to the present invention.

FIG. 2 is a sectional view of a carriage.

FIG. 3A is an arrow view A showing a carriage driving mechanism.
FIG. 3B is a cross-sectional view taken along line BB.

FIG. 4 is a diagram illustrating the principle of the device.

FIG. 5 is a perspective view showing a lens frame and a template shape measuring unit according to the present embodiment.

FIG. 6-1 is a diagram showing a frame holding unit 2000A.

FIG. 6-2 is a detailed view of a holding unit.

FIG. 6-3 is a diagram illustrating a mechanism for holding a lens.

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

FIG. 6-5 is a diagram illustrating a rim thickness measurement mechanism.

FIG. 6-6 is a diagram illustrating a frame fixing mechanism.

FIG. 7-1 is a plan view of a measurement unit.

FIG. 7-2 is a sectional view taken along line CC of FIG. 7-1.

FIG. 7-3 is a sectional view taken along line DD of FIG. 7-1.

FIG. 7-4 is a sectional view taken along line EE of FIG. 7-1.

FIG. 8A is a diagram illustrating a measuring method.

FIG. 8-2 is a diagram showing a measuring method.

FIG. 9-1 is a diagram for explaining the movement of a tracing stylus in a vertical direction.

FIG. 9B is a diagram for explaining the movement of the tracing stylus in the vertical direction.

FIG. 10 is a diagram illustrating coordinate conversion.

FIG. 11 is a schematic view of the entire shape measuring section of a raw lens.

FIG. 12 is a cross-sectional view of a shape measuring unit of a raw lens.

FIG. 13 is a plan view of an unprocessed lens shape measuring unit.

FIG. 14 is an explanatory diagram showing the operation of a spring and a pin.

FIG. 15 is a diagram illustrating a correspondence relationship between signals of the photo switch 504 and the photo switch 505.

FIG. 16 is a diagram for measuring a moving radius of a lens.

FIG. 17A is a diagram illustrating the measurement operation of the measurement unit.

FIG. 17-2 is a diagram for explaining the measurement operation of the measurement unit.

FIG. 17-3 is a diagram illustrating the measurement operation of the measurement unit.

FIG. 18 is an external view of a display unit and an input unit according to the present embodiment.

FIG. 19A is a diagram of a display screen for setting lens processing information.

FIG. 19B is a diagram of a display screen of the bevel simulation.

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

FIG. 21 is a flowchart illustrating the operation of the apparatus.

[Explanation of symbols]

 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 523,524 Filler 506 Potentiometer

Claims (2)

(57) [Claims] 1. A ball-sliding machine for grinding a lens so as to fit into a spectacle frame, a shape data input means for inputting shape data of the spectacle frame, and layout data such as a pupil distance. Data input means for inputting data, and a tracing stylus for detecting the positions of the front and rear surfaces of the lens to be processed.
An edge detecting means for obtaining an edge position after lens processing based on the shape data input means and a plurality of bevel forming methods relating to a curve and a position based on the shape data input means and the edge detecting means are stored. And a selecting means for automatically selecting one bevel forming method from a plurality of bevel forming methods stored in the storing means based on the detection data of the edge detecting means. And a balling machine. 2. A method according to claim 1, wherein at least one of the plurality of bevel forming methods stored in the storage means has a step of dividing at a predetermined ratio based on edge position information by the edge detection means. Traverse machine.