JP3141234B2 - Eyeglass lens, processing method and processing apparatus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spectacle lens, and a method and apparatus for processing the same.

[0002]

2. Description of the Related Art In order to produce a spectacle lens adapted to a spectacle lens frame, a specific lens is selected from other kinds of circular cloth lenses produced in advance, and this is selected from a special automatic processing apparatus (for example, a special automatic processing apparatus). (Kaihei 8-174977 or the like) to form a specific lens shape. As shown in FIG. 14A , the conventional spectacle lens obtained in this manner has a bevel n in a direction perpendicular to the lens optical center line S2 at the entire peripheral position. Here,
Orientation (In the following description, "projection direction"
is there. ) Is the cross-sectional shape shown in FIG.
Is the direction of the center line of the shape .

[0003]

In the case of a large spectacle lens frame or a spectacle lens frame having a sharp curve,
In framing the spectacle lens, the spectacle lens frame Rf
r is the depth direction of the bevel groove m and the direction of the bevel n of the spectacle lens Re, that is, the direction in which the lens protrudes outward in the lens radial direction on a plane including the circumferential arbitrary position and the lens optical center line, and Since the inclination direction is different from the direction perpendicular to the optical center line, the following inconvenience may occur. this
At this time, the depth direction of the bevel groove refers to the location of the bevel groove in FIG.
A refers to the direction of the shape center line of the cross-sectional shape shown in FIG.
You .

That is, the spectacle lens Re is forcibly framed, which may cause distortion in the spectacle lens Re, or may cause the bevel n to be one-sided in the bevel groove m of the spectacle lens frame Rfr. When this happens,
The load caused by the contact between the spectacle lens Re and the spectacle lens frame Rfr is concentrated, and the peripheral portion of the bevel n may be damaged, and the finished size is also unstable. Even after adjusting the bevel convergence, the adjustment must be performed again. An object of the present invention is to eliminate such a disadvantage.

[0005]

In order to achieve the above object, a first spectacle lens according to the present invention, as described in claim 1, has a bevel groove along a frame circumferential direction along a frame circumferential direction.
The groove depth direction at any position is the bevel groove frame circumferential direction
The eyeglass lens flare that is gradually changing with the position
Frame, and the frame of the bevel groove
With a bevel fitted over the entire length of the
And bevel projection on an arbitrary radius surface around the optical center line
The direction is that the bevel on the arbitrary radius surface
In the depth direction of the bevel groove at the circumferential position
It is inclined, and the direction of this inclination is
Following the three-dimensional shape of the top of the lens
This spherical surface has a center on
Above and corresponds to the top of the bevel in the tilt direction
Of the straight lines tangent at points, the straight lines included in the arbitrary radius
The configuration conforms to the direction of the line . According to this,
The bevel accurately follows the periphery of the spectacle lens, and the direction of the bevel matches the depth direction of the bevel groove of the spectacle lens frame.

The second spectacle lens may be a frame having a bevel groove along a circumferential direction of the frame.
The groove depth direction at any position in the circumferential direction is
Eyeglass lenses that are gradually changing with changes in directional position
Framed in the frame, wherein the bevel groove
Has a bevel that fits over the entire length of the frame in the circumferential direction.
And bevel on an arbitrary radial surface around the optical center line
The protruding direction is the bevel fit on any radial surface concerned
Follow the groove depth direction of the bevel groove at the frame circumferential direction
The direction of this inclination extends over the entire circumference of the frame.
A lens that follows the three-dimensional shape of the bottom of the bevel groove
Frame copying sphere with center on optical center line
Of the bevel on the spherical surface in the projection direction
The arbitrary radius of the straight line tangent at the point corresponding to the top
The configuration is such that it matches the direction of the straight line included in the surface .
According to this, the bevel accurately follows the spectacle lens frame, and the direction of the bevel is the depth direction of the bevel groove even in a large spectacle lens frame or a sharp spectacle lens frame. Will be matched.

Next, in the first method for processing a spectacle lens according to the present invention, as described in claim 3, a lens copying spherical surface adapted to follow an imaginary bevel top depending on the peripheral shape of the spectacle lens is specified. and, with specifying a virtual optical center line corresponding to the lens optical center line on the spherical surface, identifies a virtual bevel corresponding to the bevel apex on the spherical, and any point of the virtual optical center line around this virtual bevel The virtual optical center
A tangent line that is to be in contact with the spherical surface at the arbitrary point on the plane including the line, and on the plane including the arbitrary point and the lens optical center line of the virtual bevel existing at the position corresponding to the arbitrary point. The direction in which the projection is directed toward the outside of the lens diameter and the direction inclined with respect to the direction perpendicular to the lens optical center line is processed so as to match the direction of the tangent line. Thus, the spectacle lens according to the first aspect is formed.

According to a second aspect of the present invention, there is provided a method for processing a spectacle lens, comprising specifying a lens frame copying spherical surface adapted to follow a bevel groove of a spectacle lens frame,
A virtual optical center line corresponding to the lens optical center line is specified on this spherical surface, and a position of the virtual bevel groove corresponding to the bevel groove is specified on the spherical surface, and an arbitrary point of the virtual bevel groove and the virtual optical center are determined. A tangent line that is to be in contact with the spherical surface at the arbitrary point on the plane including the line, and on the plane including the arbitrary point and the lens optical center line of the virtual bevel existing at the position corresponding to the arbitrary point. In this case, the inclination direction with respect to the projection direction toward the outside of the lens diameter and the direction orthogonal to the lens optical center line is processed so as to match the direction of the tangent line corresponding to the inclination direction. Thereby, the spectacle lens according to the second aspect is formed.

In the first and second methods of processing a spectacle lens, as described in claim 5, the cloth specified by the shape of the spectacle lens frame to which the bevel top is fitted and the front surface of the cloth lens. The edge of the fabric lens, on a straight line parallel to the optical center line, passing through a point corresponding to the arbitrary position in the circumferential direction on a position corresponding to the shape of the spectacle lens frame on the front surface of the lens. In relation to the thickness, the position of the top of the bevel in the direction of the optical center line is specified. According to this, the appearance of the spectacle lens framed in the spectacle lens frame becomes excellent.

According to a third aspect of the present invention, there is provided a method for processing an eyeglass lens, comprising: a lens rotation axis for gripping a fabric lens; and a horizontal slide axis for relatively sliding the lens rotation axis in the lens rotation axis direction. A lens diameter feed axis for displacing the lens rotation axis in a specific direction perpendicular to the lens rotation axis, and a grindstone driven to rotate around a grinding wheel rotation axis made in the same direction as the lens rotation axis. On the other hand, four axes including a whetstone swinging feed axis for swinging around a fulcrum axis orthogonal to the lens rotation axis are prepared, and the peripheral edge of the spectacle lens is processed by controlling these four axes. According to this, the spectacle lens as described in claims 1 and 2 can be formed accurately and quickly.

The first to third eyeglass lens processing methods described above are specifically performed as follows, ie, as described in claim 7, the lens optical center line of the eyeglass lens frame. Based on the spectacle frame shape data that specifies the bevel groove shape around the position and the unprocessed lens measurement data obtained by measuring the position corresponding to the bevel groove shape of the fabric lens, a virtual bevel top portion The position, the virtual arbitrary direction of the peripheral edge of the spectacle lens and a projecting direction toward the lens radial direction outward on a plane including the lens optical center line, and an inclination direction with respect to a direction orthogonal to the lens optical center line, Processing data that is specified for the entire periphery of the spectacle lens is created, and the bevel is processed based on the processing data. This enables automatic and continuous processing by the computer control device.

Further, the third method for processing the spectacle lens is specifically as follows. That is, as described in claim 8, based on the spectacle frame shape data and the lens measurement data before processing, the position of each point in the circumferential direction of the bevel top at minute intervals is specified, and the lens measurement data before processing is used. By the lens copying spherical surface adapted to follow the bevel top of the spectacle lens, the arbitrary shape on the spherical surface in the direction related to the specific diameter around the lens optical center line corresponding to the point at each circumferential small interval. At a specific point corresponding to the point, processing data is created in which the direction of a tangent line that comes into contact with this spherical surface is specified, and based on the processing data, the grindstone rotation axis is swung in relation to the direction of the tangent line. Processing the bevel while moving. As a result, the bevel is automatically and continuously processed by the computer control device according to the third aspect of the present invention.

The following method may be used instead of the method described in claim 8, that is, as described in claim 9, based on eyeglass frame shape data and lens measurement data before processing. The position of each point in the circumferential direction of the bevel top is specified, and an arbitrary point in the longitudinal direction of the bevel groove is formed by a frame copying spherical surface which is made to follow the bevel groove of the spectacle lens frame by the spectacle frame shape data. At a specific point corresponding to the arbitrary point on the spherical surface in a direction related to a specific diameter around the lens optical center line in the above-described processing data in which a direction of a tangent line contacting the spherical surface is specified. Based on this processing data, the bevel is processed while the grindstone rotating shaft is rocked in relation to the tangential direction. As a result, the bevel is automatically and continuously processed by the computer control device in the method described in claim 4.

According to a third aspect of the present invention, there is provided a spectacle lens processing apparatus, wherein a lens rotation axis for gripping a fabric lens and a horizontal slide for relatively sliding the lens rotation axis in the lens rotation axis direction. Axis, a lens diameter feed axis for relatively displacing the lens rotation axis in a direction orthogonal to the lens rotation axis, and a grindstone that is driven to rotate around the grindstone rotation axis in the lens rotation axis direction based on the processing data. And a whetstone rocking feed shaft for relatively rocking around a fulcrum shaft perpendicular to the shaft. According to this, the eyeglass lens according to claims 1 and 2 can be processed with a simple and compact structure.

The third eyeglass lens processing apparatus may include the following additional processing apparatus. That is, as described in claim 11, a chamfering grindstone for chamfering the peripheral edge of the spectacle lens is provided, and the chamfering grindstone has a configuration of two types of a rough machining portion and a finishing machining portion. According to this,
With the same device, chamfering can be performed.

[0016]

FIG. 1 is a front view showing an embodiment of a processing apparatus according to the present invention, and FIG. 2 is a side view of the processing apparatus. In these figures, reference numeral 1 denotes a box-shaped main body frame also serving as a casing, and a cover 2 is mounted on the upper portion of the frame 1 via a hinge 3 so as to be openable and closable.

Reference numeral 4 denotes a swing table disposed above the main body frame 1. The swing table 4 has arm members 4a, 4a projecting rearward from rear left and right ends, and is provided between the arm members 4a, 4a. The supporting shaft 5 is fixed in a bridging manner. The support shaft 5 is rotatably and horizontally slidably supported by a left-right bearing 6 fixed to a part 1a of the main body frame 1.

At the front left and right of the swing table 4, overhanging portions 4 are provided.
b and 4c are formed, and a recess 7 is formed between them. A right lens rotating shaft 8a facing left and right is penetrated by the right overhanging portion 4b so as to be freely rotatable and movable left and right, and the right end is connected to the chucking operation mechanism 9, and the left overhanging portion 4c is provided. The left lens rotating shaft 8b facing left and right is arranged so as to be rotatable and disposed so as to be linear with the right lens rotating shaft 8a.

At this time, the chucking operation mechanism 9 is driven by a forward / reverse rotation operation of a motor 10 fixed to the inner rear right side of the swing table 4 via a synchro belt transmission unit 11 and a right and left moving force generation unit 12 to rotate the right lens. The rotating shaft 8a is displaced leftward or rightward. Reference numeral 13 denotes a cover member fixed to the outer side surface of the right overhang portion 4b, and covers the right lens rotating shaft 8a so that the right end thereof is not exposed to the outside when the right lens rotating shaft 8a is moved to the right.

A step motor 14 for rotating and driving the left and right lens rotating shafts 8a and 8b is fixed to the inner rear left side of the swing table 4. The output shaft 14a of the motor 14 is A left end portion of an intermediate shaft 16 rotatably supported by a horizontally long bearing portion 15 provided at an inner central portion is coupled via a gear transmission mechanism 17. The right end of the intermediate shaft 16 is connected to the right lens rotation shaft 8a via a synchro belt transmission 17a, and the left end of the intermediate shaft 16 is connected to the left lens rotation shaft 8b via a synchro belt transmission 17b. It is.

Numeral 18 denotes a lateral feed means formed on the left side of the swing table 4, and a pulse motor 1 fixed to the main body frame 1.
9, a screw shaft 20 serving as a horizontal slide shaft rotated and driven by the pulse motor 19, a nut body 21 screwed to the screw shaft 20, and one end of the support shaft 5 fixed to the nut body 21 and the other end. It consists of a connecting member 22 which is rotatably connected to the left end.

Reference numeral 23 denotes a lens diameter feeding means formed below the right side of the swing table 4, and is configured as follows. That is, a radial feed arm 24 is provided, one end of which is rotatably connected to the right end of the support shaft 5. The other end of the arm 24 is held at a constant height via a guide means 25 and is movable in the left-right direction. It is movably supported.

Here, the guide means 25 is a vertically supporting member 2 fixed to the upper surface of the horizontal plate frame member 1b in an upright manner.
6, a guide path 27 in the form of a round bar fixed to the stepped upper end surface of the support member 26, a wheel body 28 guided by the guide path 27 so as to be movable left and right, and the other end of the radial feed arm 24 And a shaft member 29 protruding from the shaft member and rotatably supporting the wheel body 28. Reference numeral 30 denotes a switch for detecting that the radial feed arm 24 has moved left and right to a predetermined position.

A pulse motor 31 is fixed vertically to the radial feed arm 24, and a screw shaft 32, which is a lens radial feed shaft driven to rotate by the motor 31, extends downward. On the other hand, there is provided a vertical diameter feed rod 33 which is vertically displaceably guided by a guide member (not shown) fixed to the diameter feed arm 24.
3 and a nut body 34 screwed to the screw shaft 32
And are connected by a connecting plate 35.

The upper end of the vertical diameter feed rod 33 has a contact member 3
The contact member 36 supports a ring body 37 that is rotatably mounted on a projection shaft that projects laterally from the right overhang 4b of the swing base 4.

The lens diameter feeding means 2 having such a configuration
The screw shaft 3 is driven by the forward and reverse rotation of the pulse motor 31.
2 is rotated, the nut body 34 and the vertical diameter feed rod 33 are vertically displaced in conjunction therewith, and the vertical displacement of the diameter feed rod 33 is transmitted via the contact member 36 and the ring body 37 to the swing table 4. And it operates so as to vertically displace the lens rotation shafts 8a and 8b around the support shaft 5.

Numeral 38 denotes a grindstone device formed below the lens diameter feed means 23. The grindstone support base 39 is formed in a square cylindrical shape, and a grindstone 40 serving as a cutting blade is fixed to the right end. 41 and a driving means 42 for rotating the grindstone 40 are provided.

At this time, the grindstone support table 39 has a pair of fulcrum shafts 43, 43 protruding from the outer surfaces of the front and rear side wall portions a1, a2, and rotates the fulcrum shafts 43, 43 and each fulcrum shaft 43. Via a movably supported bearing member 44, a left and right plate frame member 1c which forms a part of the main body frame 1 is swingably supported around fulcrum shafts 43, 43, and a grinding wheel rotating shaft Bearing part 4 for holding rotatably 41
5 is formed. The grindstone 40 has a cylindrical shape having a rough processing part b1 and a finishing processing part b2 having a V-shaped groove formed on its peripheral surface.
And below the recessed portion 7.

The driving means 42 fixes a grinding wheel rotation motor 46 on the upper surface of the bottom wall c of the grinding wheel support 39, and a pulley 47 fixed to an output shaft of the motor 46 and a left end of the grinding wheel rotation shaft 41. A transmission belt 49 is wound around the fixed pulley 48, and a tension pulley 50 for tensioning the transmission belt 49 is mounted on the grindstone support base 39.

Numeral 51 denotes a grinding wheel swinging and feeding means formed below the grinding wheel device 38, which is constructed as follows. That is, the motor support piece 52 and the shaft support piece 53 are erected on the upper surface of the horizontal plate frame member 1d. Then, a step motor 54 is fixed to the motor support piece 52, and a screw shaft 55 forming a grindstone rocking feed shaft connected to an output shaft of the motor 54 is extended rightward from the motor 54, and the right end thereof is supported by a shaft. The piece 53 is rotatably supported.
A nut body 56 is screwed onto the screw shaft 55,
An inverted U-shaped fork member 57 is fixed to the lower surface of the bottom wall portion c of the grindstone support base 39, and engagement protrusions d provided on each side of the outer peripheral surface of the nut body 56 are fixed to each side of the fork member 57. Into the fork groove e.

The whetstone rocking and feeding means 51 rotates the screw shaft 55 by forward and reverse rotation of the step motor 54 to move the nut body 56 and the fork member 57 left and right. It operates so as to swing the grinding wheel 39 and the grinding wheel rotating shaft 41 and the grinding wheel 40 integrated therewith around the fulcrum shafts 43, 43.

Reference numeral 58 denotes a chamfering means formed on the right side of the grindstone device 38. The chamfering means 58 includes a chamfering grindstone device 59 and a grindstone back-and-forth moving means 60 for moving the device 59 back and forth. At this time, the chamfering grindstone device 59 is
At the rear, a vertical grindstone rotating shaft 62 is rotatably mounted at a fixed height position, and a conical chamfering grindstone 63 is fixed at the upper end of the rotating shaft 62, and a pulley 64 is fixed at the lower end,
A grindstone driving motor 65 is vertically fixed to the front of the device frame 61 and a pulley 66 is attached to the output shaft of the motor 65.
And a transmission belt 67 is wound around the pulley 66 and the pulley 64.

The fore-and-aft wheel feeding means 60 includes a main frame 1
A support member 68 is provided in the same shape as the above, and the device frame 61 of the chamfering grindstone device 59 is guided by the support member 68 so as to be movable back and forth through a guide track portion k.
A motor 69 is fixed to the motor frame 61, and the apparatus frame 61 and the chamfering grindstone 63 are moved forward and backward by the forward and reverse rotation of the motor 69.

The configuration of the main part of the processing apparatus according to the present invention has been described above. Although not shown in the figure, a computer numerical controller (CNC) for controlling each part and sensors and others required for control are provided. In addition to providing a switch, etc., a frame measuring device for obtaining data on the three-dimensional shape of the spectacle lens frame and a lens measuring device for obtaining data on the position of the bevel of the fabric lens in the direction of the lens optical center and the edge thickness are provided. .

Next, examples of use and processing contents when processing the spectacle lens by the processing apparatus of the present invention will be described with reference to FIGS. 3, 4, 5, 6, and 7, and FIGS. Each step will be described with reference to FIG .

Step 100: This will be described with reference to FIGS. 3, 8, and 9. Here, FIG. 8 is a front view of the spectacle frame, FIG. 9 shows the measurement contents and the like of the spectacle frame, A is a plan view in a measurement state, and B is a side view in the measurement state. The spectacle frame M shown in FIG. 8 in which the lens is to be framed is set in a frame measuring device (not shown, for example, as shown in JP-A-1-92055), and the right spectacle lens frame Rfr1 is first set. The three-dimensional shape of the locus of the bottom of the bevel groove m is measured.

More specifically, measurement points P _i ( _i = 1, 2, 3,...) At every fixed angle around the arbitrary center line C0
n) the radial angle θ0 _i and the radial length ρ0 _i
If any center line to measure the distance h0 _i to the measurement point _{P i} from an arbitrary measurement reference plane SK0 shown in FIG. 9A orthogonal to the C0, the data source measurement data (θ0 _i, ρ0 _i, h
0 _i ) ( _i = 1, 2, 3,..., N).

Step 101: The CNC device uses the original measurement data (θ0 _i , ρ0 _i , h
0 _i ) ( _i = 1, 2, 3,..., N) to calculate the inclination angles α, β of the spectacle lens frame Rfr1. Specifically, it is performed as follows. FIG. 10 is an explanatory diagram of data processing on rectangular coordinates. As shown in this figure, the original measurement data (θ0 _i , ρ0 _i , h0 _i ) ( _i = 1,
2,3, ·····, n) to each measurement point _{P i} XYZ
Data on the coordinates (X _i , Y _i , Z _i ) ( _i = 1,
., N), and the position of the geometric center (boxing center) BC of the spectacle lens frame Rfr1 is also converted into XYZ coordinate values (BX1, BY1, BZ1). At this time, the virtual line Ka is the eyeglass lens frame Rfr.
1 is projected onto the XY plane.

Any four measurement points of this data (these measurement points should preferably be selected as far apart as possible), ie for example P _{i = 70} , P _{i = 140} , P
_The spherical surface K1 passing through _{i = 210} and _{Pi = 280} is described in
No. 174,397, and the coordinates (KX2, KY2, KZ) of the center point KC of the corresponding sphere are calculated.
2) and the radius KR is specified. At this time, as shown in FIG. 8 and the like, the left-right direction of the spectacle lens frame Rfr1 is set along the X-axis, and the up-down direction is set along the Y-axis. Thus, the spherical surface K1 substantially follows the bevel groove m of the spectacle lens frame Rfr1.

Next, on the XYZ coordinates, the boxing center BC of the eyeglass lens frame Rfr1 and the center point KC of the spherical surface K1
Is specified. The angle projected on the XZ plane at the intersection angle between the straight line S1 and the Z axis is the spectacle lens frame R
rf1 is the horizontal inclination angle α, and the angle of intersection between the straight line S1 and the Z axis and projected on the YZ plane is the vertical inclination angle β of the spectacle lens frame Rfr1.

Step 102: Original measured data (θ0 _i , ρ0 _i , h0 _i ) ( _i =
1,2,3, ..., the angle of inclination of the spectacle lens frame Rfr1 distance h0 _i of n) alpha, corrected in beta.

That is, the inclination of α and β is eliminated, and the measurement data is corrected to the data obtained when the eyeglass lens frame is virtually rotated so that Rfr1 is horizontal.

The corrected measurement data obtained in this processing is set to (θ0 _i , ρ0 _i ', h0 _i ').

Step 103: As shown in FIGS. 1 and 2, the circular fabric lens Re is gripped by the inner ends of the left and right lens rotation shafts 8a and 8b.
At this time, the optical center line of the fabric lens Re is set to the lens rotation axis 8.
a, 8b.

More specifically, the motor 10 is rotated by a required switch operation to move the right lens rotating shaft 8a to the left with respect to the left lens rotating shaft 8b. The existing lens suction shaft that has been sucked onto the optical center line of the fabric lens Re by the processing of
a. Thereafter, the motor 10 is rotated in the opposite direction to the front to move the lens rotating shaft 8a to the left, and the front and rear surfaces of the fabric lens Re are firmly pressed between the left and right lens rotating shafts 8a and 8b.

Step 104: A processing mode for determining the position and angle of the bevel is selected by a switch operation of the CNC device. On this occasion,
Select either the manual processing mode or the automatic processing mode. Then, when the manual processing mode is selected, one of three modes, namely, frame copying, lens copying or curve designation is selected. On the other hand, when the automatic processing mode is designated, the priority order is further set for the three components of frame copying, lens copying and curve designation.

Here, frame copying is based on the shape of the spectacle lens frame Rfr1 for processing, and lens copying is based on the processing of the shape of the spectacle lens to be framed. Is based on a desired curve value (radius of curvature). In addition,
When selecting the curve specification in the manual machining mode,
The curve value is specified by key operation. Even when the automatic processing mode is designated, the curve value in the curve designation mode is specified.

Step 105: Prescription information is input by operating an input key of a CNC device (not shown). This prescription information is a spectacle lens frame R
This is information on which position in fr1 the optical center is located. Referring to FIG. 8, a distance d1 for vertically displacing the boxing center BC of the spectacle lens frame Rfr1 is input, and information on a pupil center distance PD and a spectacle frame M of a person wearing spectacles is input. I do. The CNC device calculates a distance d2 to be displaced in the left-right direction with respect to the boxing center BC from the input pupil center distance PD and the input distance between the boxing centers BC of the spectacle frame. The point C1 specified in this manner forms the optical center of the spectacle lens.

Step 106: The corrected measurement data (θ obtained in the previous step 102)
_{0 i, ρ0 i ', h0} i') (i = 1,2,3, ·
.., N) are converted by the distance d1 in the horizontal direction and the distance d2 in the vertical direction based on the information (distance d1, distance d2) on the optical center point C1 obtained in the previous step 105. , Measurement points P _i ( _i = 1, 2, 3,...) At every fixed angle around the optical center line S2.
n) the radial angle θ1 _i and the radial length ρ1 _i
And spectacle frame shape data (θ1 _i , ρ1 _i , h0 _i ′) ( _i = 1, 2, 3,
..., N) are stored in the memory of the CNC device.

Step 107: The machining is started by the switch operation of the CNC device.

Step 108: The CNC device checks the material lens for the material lens Re to be processed. That is, when measuring the edge thickness along the frame shape of the processed dough lens Re by a known measuring means, when the measuring element is displaced from the outer peripheral edge of the dough lens Re, and a change of the measurement data by a specific value or more occurs. Suppose that the dough breaks out.

If the material does not run out, the process proceeds to step 109. On the other hand, when the material is cut out, the input prescription value must be re-established within an allowable range or the material lens Re to be processed must be replaced with one having a larger diameter. For this reason, the automatic processing by the CNC device is stopped.
5, and in the latter case, the process returns to the previous step 103.

Step 109: A known lens measuring device (not shown) (for example,
17849, etc.), the workpiece lens Re gripped by the lens rotation shafts 8a and 8b is measured. Specifically, it is performed as follows. FIG. 11 shows a measurement state of the fabric lens Re to be processed, wherein A is a front view explanatory view and B is a side view explanatory view. As shown in this figure, eyeglass frame shape data (θ
1 _i , ρ1 _i , h0 _i ′) ( _i = 1, 2, 3,...)
, N), each measurement point (bevel top position) P _i ( _i = _i ) specified by a radial angle θ1 _i and a radial length ρ1 _i around the optical center line S2 of the workpiece lens Re.
.., N) from any measurement reference plane SK1 perpendicular to the optical center line S2 of the processed cloth lens Re to the measurement point on the front surface RS1 of the processed cloth lens Re. The distance h1 _i and the edge thickness w _i are measured, and these data are converted into the spectacle lens measurement data (θ1 _i , ρ) before processing.
_{1 i, h1 i, w i} ) (i = 1,2,3, ····
.., N) are stored in the memory of the CNC device.

Step 110: Here, the next step to be shifted is specified. At this time, after selecting the manual processing mode in the previous step 104, when the frame copying is selected, the process shifts to the mode 1 shown in FIG. 4, and when the lens copying is selected, FIG.
The mode shifts to mode 2 shown in FIG. 6, and when the curve designation is selected, shifts to mode 3 shown in FIG. On the other hand, when the automatic processing mode is selected, the processing shifts to mode 4 shown in FIG. Hereinafter, each mode will be described.

A) When the mode is shifted to the mode 1 (see FIG. 4) Step 111: Measurement data (θ1 _i , ρ1 _i , h1) of the pre-processing eyeglass lens
_{i, w i) (i =} 1,2,3, elect a maximum edge thickness _{w i} of the edge thickness _{w i} of ·····, n), FIG. 11B
As shown in the installation of the position of the bevel corresponding to the maximum edge thickness w _i: identifying the (Y1 Y2). The set position (Y1: Y2) is related to the maximum edge thickness w _i, so in advance plural kinds of things have been established, to choose from this. The set value "Y1: Y2" is the distance the position of the in bevel apex in the thickness direction of the edge thickness w _i at each measuring point P _i, from the front RS1 of the workpiece cloth lens Re YK
1 and the distance YK2 from the rear surface RS2, and specifically, displayed as, for example, "3: 7".

[0056] Step 112: set value of the bevel position identified in the previous step 111 (Y1: Y2) using the front edge thickness _{w i} in the processed fabrics lens Re on each measuring point _{P i} RS
Specific distance YK1 from 1 to the provisional bevel expected position
_i is calculated from the following equation. _{YK1 i = w i × (Y1} / (Y1 + Y2)) (i = 1,2,3, ·····, n)

Then, the distance YK1 _i and the measurement data (θ1 _i , ρ1 _i , h1 _i , w)
_i ) h1 _{i of} ( _i = 1, 2, 3,..., n)
, The distance YK3 _i from the reference plane SK1 to the temporary bevel position for each measurement point P _{i is} calculated from the following equation. YK3 _i = YK1 _i + h1 _i ( _i = 1, 2, 3,..., N) This calculated data is converted to temporary bevel position data (θ1 _i ,
ρ1 _i , YK3 _i ) ( _i = 1, 2, 3,...)
., N).

Step 113: FIG. 12 is an explanatory diagram for determining the final position of the bevel. As shown in this figure, here, the spectacle frame shape data (θ1 _i , ρ1 _i , h0 _i ′) ( _i = 1,
The reference plane S at a distance h0 _i ′ of 2, 3,..., N)
The difference value D between K0 and distance YK3 _i of the reference plane SK1 and (constant value), the difference value D between _(YK3 i + D) and h0 _i '
The _i is calculated for each measurement point, and calculates the average value Dm of these differences value D _i. This average value Dm is the sum of all difference values D _i
Is added and divided by n (simple average), or this is further divided into eyeglass frame shape data (θ1 _i ,
ρ1 _i , h0 _i ′) ( _i = 1, 2, 3,...)
, N), etc., as appropriate.

Then, for each measurement point P _i , the distance YK4 _i from the reference plane SK1 to the bevel position is calculated by the following equation. YK4 _i = YK3 _i -Dm ( _i = 1, 2, 3,..., N) The calculated data is converted to eyeglass frame shape data (θ1 _i ,
ρ1 _i , h0 _i ′) ( _i = 1, 2, 3,...)
, N), that is, (θ1 _i , ρ1 _i ,
YK4 _i ) ( _i = 1, 2, 3,..., N)
The final bevel position data is used. This bevel position data matches the bevel groove m of the spectacle lens frame Rfr1 and is temporary bevel position data (θ1 _i , ρ
1 _i , YK3 _i ) ( _i = 1, 2, 3,...,.
n) as closely as possible.

Step 114: Final bevel position data (θ1 _i , ρ1 _i , YK4
_i ) Distance YK of ( _i = 1, 2, 3,..., n)
4 _i is the unprocessed spectacle lens measurement data (θ1 _i , ρ1
_{i, h1 i, w i)} (i = 1,2,3, ····
· To determine whether in the automatically determined is the allowable range from a distance h1 _i and edge thickness w _i, etc. n). When it is within the allowable range, the process proceeds to step 115, and when it is not within the allowable range, the process returns to step 104.

Step 115: Here, the eyeglasses on this spherical surface K1 are determined based on the frame scanning spherical surface (determined in the previous step 101) K1 which follows the bevel groove (deepest part) m of the eyeglass lens frame Rfr1. lens periphery calculating the tangent of the angle the radius vector direction in contact with the spherical surface K1 at a point corresponding to each measurement point P _i of (locus shape measurement points P _i). Specifically, the spherical K1 corresponding to each measurement point _{P i} on the XYZ coordinate shown in FIG. 10
Identify radial tangent line S3 for contact with the spherical K1 at a point above, this tangent S3, and calculates the angle of intersection Q _i of the straight line S4 for orthogonal to the optical center line S2 in radial direction. The calculated data is converted to bevel position data (θ1 _i , ρ1 _i , YK4
_i ) ( _i = 1, 2, 3,..., n), that is, (θ1 _i , ρ1 _i , YK4 _i , Q _i )
( _I = 1, 2, 3,..., N) is final processing data and stored in the memory.

Step 116: Final processing data (θ1 _i , ρ1 _i , YK4 _i ,
When Q _i ) ( _i = 1, 2, 3,..., N) is stored, the swing table 4 is operated by the operation of the lens diameter feed shaft 32.
Moves down onto the rough processing portion b1 of the grindstone 40. Then, based on the final processing data, the lens rotation axes 8a, 8
b, the lens diameter feed shaft 32 is operated to perform rough processing of the workpiece lens Re. During this roughing, the grinding wheel rotating shaft 41
Are held in the same direction as the lens rotation axes 8a and 8b, and the cloth lens Re to be processed is processed into the shape of the spectacle lens frame Rfr1 in which the bevel is not processed. Therefore, the periphery of the unfinished spectacle lens Re after the rough processing is along the optical center line S2.

Step 117: After the completion of the roughing, the swing table 4 is raised. Next, the swing table 4 is horizontally slid by the operation of the horizontal slide shaft 20, moves onto the finishing portion b2 of the grindstone 40, and descends again. Then, based on the final processing data, the lens rotation shafts 8a and 8b, the horizontal slide shaft 20, the lens diameter feed shaft 32, and the grindstone swing feed shaft 55 are operated, and the bevel n inclined in various directions is continuously operated by this operation. Processing. The state of the processing at this time is as shown in FIG. 13 , and FIG. 14B shows the spectacle lens thus processed. At this time, the roughing spectacle lens Re, the first radial angle .theta.1 _{1 = 1} (zero) for each measurement point _{P i} shown in FIG. 10 and the radius vector length ρ1
Processing is started from the position of _{1 = 1} , and at each measurement point P _i , the horizontal slide shaft 20 moves the distance YK4 _i of the final processing data.
The position of the lens is controlled by
The angle of the grinding wheel swinging feed shaft 55 crossing angle _{Q i} against 8b
It is controlled so that

Therefore, the finished spectacle lens is
To follow the V-shaped groove m of the spectacle lens frame Rfr1 bevel n top of the entire circumference is fitted in this, moreover have been made to that location to match the edge thickness w _i of an eyeglass lens, also The inclination direction f1 with respect to the direction of the bevel n at an arbitrary peripheral edge, that is, a protruding direction toward the outside in the lens radial direction on a plane including the arbitrary position in the circumferential direction and the lens optical center line, and orthogonal to the lens optical center line.
Is a tangent line S3 that comes into contact with the bevel groove m of the spectacle lens frame Rfr1 at the arbitrary position on the frame copying spherical surface K1 in a radial direction around the lens optical center point C1 corresponding to the arbitrary position. Will be matched. Further, the bottom surface ns of the bevel n (see FIG. 14B ) is perpendicular to the inclination direction f1 with respect to the direction perpendicular to the lens optical center line of the bevel n due to the relationship with the shape of the finishing portion b2 of the grindstone 40.

Step 118: After finishing, the swing table 4 is slid horizontally to move to the chamfering position, and the chamfering grindstone device 59 is moved to the rear side by the operation of the step motor 69. Next, as shown in FIG. 15, the unprocessed lens measurement data _{(θ1 i, ρ1 i, h1} i, w i) (i = 1,
2, 3,..., N)
a, 8b, the horizontal slide shaft 20, and the lens diameter feed shaft 32 are controlled, and the chamfering grindstone 63 chamfers the periphery of the front surface RS1 and the periphery of the rear surface RS2 of the spectacle lens separately. Here, FIG. 15 is a side view showing the relationship between the chamfering grindstone device 59 and the finished texture lens Re.

Step 119: After the chamfering is completed, the swing table 4 is raised, the apparatus returns to the initial state, and waits for the next processing.

B) When the mode is shifted to mode 2 (see FIG. 5) Step 211: Similar to steps 111 and 112 of mode 1, the spectacle lens measurement data (θ1 _i , ρ1 _i ,
h1 _i , w _i ) ( _i = 1, 2, 3,...,.
n), the setting value (Y1: Y2) of the beard position is specified, and then, as shown in FIG. 12 , using the set value of the bevel position (Y1: Y2), each measurement point P _{i is used.} for the front of the edge thickness w _i on the in the work cloth lens Re RS
Calculating a specific distance YK1 _i from 1 to the position of the bevel, the distance YK1 _i and, unprocessed eyeglass lens measurement data _{(θ1 i, ρ1 i, h1} i, w i) (i =
1,2,3, ..., from h1 _i of n), calculates the distance YK3 _i from the measurement reference plane SK1 for each measurement point _{P i} to the position of the bevel, the bevel position data the calculated value ( θ1 _i , ρ1 _i , YK3 _i ) ( _i = 1,
, N).

Step 212: Bevel position data (θ1 _i , ρ1 _i , YK3 _i ) (
_i = 1, 2, 3,..., n) distance YK3 _i
Is the eyeglass frame shape data (θ1 _i , ρ1 _i , h0
_i ′) ( _i = 1, 2, 3,..., n) distance h
It is determined whether it is within an allowable range automatically specified in relation to 0 _i ′ or the like. When it is within the allowable range, the process proceeds to step 213, and when it is not within the allowable range, the process returns to step 104.

Step 213: The bevel position data (θ1 _i , ρ1 _i , YK3
_i ) From ( _i = 1, 2, 3,..., n), a lens copying spherical surface that imitates a bevel is specified according to step 101 described above. Specifically, the previous step 10
According to 1, each bevel position of this data is converted into XYZ coordinates, and passes through any four bevel position points of the converted data (these points should preferably be selected as far apart as possible). A spherical surface, that is, a lens copying spherical surface is calculated.

[0070] Step 214: Based on the lens copying spherical in step 213, calculates an angle Q1 _i of radial tangent becomes in contact with the spherical surface at a point corresponding to the bevel position points on this sphere. Specifically, according to step 115, XYZ
Identify a specific radial tangent corresponding to this point that will be in contact with this spherical surface at a point on the lens scanning spherical surface corresponding to each bevel position point on the coordinates, and determine the tangent and the specific radial direction. And the intersection angle Q1 _i with a straight line orthogonal to the optical center line
Is calculated. This calculated data is converted to bevel position data (θ1
_{i, ρ1 i, YK3 i)} (i = 1,2,3, ···
.., n), that is, (θ1 _i , ρ1)
_{i, YK3 i, Q1 i)} (i = 1,2,3, ···
.., N) are final processed data and stored in the memory.

Step 215: After the above-mentioned final processing data is obtained, the operations and processes of Steps 116 to 119 in mode 1 are performed. This again, each section is of being actuated on the basis of the final processed data, thus the horizontal slide shaft 20 is controlled its position based on the distance YK3 _i final processing data at each bevel position and lens rotation Shafts 8a, 8b
The angle of the grinding wheel swinging feed axis 55 is controlled so that the crossing angle Q1 _i against.

[0072] The finished spectacle lens by the mode 2, the orientation of the bevel n bevel n top of the entire periphery are meet certain percentage position of the edge thickness w _i of the point where its position and the periphery arbitrary position That is, the inclination direction f1, which is a protruding direction toward the outside in the lens radial direction on a plane including the arbitrary position in the circumferential direction and on the lens optical center line and perpendicular to the lens optical center line, follows the top of the bevel n. The direction of the tangent line that comes into contact with the above-mentioned arbitrary position on the lens copying spherical surface in the radial direction around the lens optical center line S2 corresponding to this arbitrary position is obtained.

C) When the mode is shifted to mode 3 (see FIG. 6) Step 311: Similar to steps 111 and 112 of mode 1, the spectacle lens measurement data (θ1 _i , ρ1 _i ,
h1 _i , w _i ) ( _i = 1, 2, 3,...,.
Installation value of the bevel position based on n) (Y1: Y2) Identify, then set value of the bevel position (Y1: Y2) using, at on edge thickness _{w i} for each measurement point _{P i} A specific distance YK1 _i from the front surface RS1 of the fabric lens Re to be processed to the position of the temporary bevel is calculated, and this distance Y is calculated.
K1 _i and the measured eyeglass lens measurement data (θ1 _i , ρ
_{1 i, h1 i, w i} ) (i = 1,2,3, ····
- distance from h1 _i of n), the measurement reference plane SK1 to the position of the temporary bevel for each measurement point _{P i} YK3 _i
Is calculated, and this calculated value is used as temporary bevel position data (θ
1 _i , ρ1 _i , YK3 _i ) ( _i = 1, 2, 3,...)
.., N).

Step 312: FIG. 16 is a view for explaining the mode 3, and as shown in this figure, the designated curve spherical surface K2 determined by the curve value specified in the previous step 104 is specified on the XYZ coordinates. . At this time, the center of the designated curve spherical surface K2 is located on the Z axis. On the other hand, the spectacle frame shape data (θ1 _i , ρ1 _i , h0 _i ′) obtained in step 106 (
_i = 1,2,3, _·····, based on n), a point corresponding to each measurement point _{P i} in on the specified curve sphere K2, i.e. to identify the bevel position point. At this time, the optical center line S2 related to the bevel position point is made to coincide with the Z axis. An arbitrary reference plane SK2 orthogonal to the optical center line S2 is specified. Here, the reference plane SK2 is, for example, an XY plane.
Distance YK from this reference plane SK2 to each bevel position point
5 _i is calculated for each measurement point P _i , and this calculated data is used as the bevel position data (θ1 _i , ρ1
_i , YK5 _i ) ( _i = 1, 2, 3,...,
n).

Step 313: FIG. 17 is a diagram for explaining the bevel position . As shown in FIG. 17 , the bevel position data (θ1
_i , ρ1 _i , YK5 _i ) ( _i = 1, 2, 3,...)
..., difference value between the reference plane SK2 distance YK5 _i of n), the reference plane SK1 distance YK3 _i in step 311 D1
_i (constant value), (YK3 _i + D1) and YK5 _i
The difference value D1 _i and calculated for each measurement point _{P i,} and calculates an average value D1m of these differences values D1 _i. This average D1m is divided by n by adding all the difference value D _i (simple average) and either, or which is further appropriately formed and the like that corrected based on the spectacle frame shape data, and the like.

[0076] For each of bevel position points, the distance YK6 _i from the reference plane SK1 calculated by the following equation. YK6 _i = YK3 _i -D1m ( _i = 1, 2, 3,..., N) The calculated data is converted to eyeglass frame shape data (θ1 _i ,
ρ1 _i , h0 _i ′) ( _i = 1, 2, 3,...)
, N) and associates this with the final bevel position data (θ1 _i , ρ1 _i , YK6 _i ) ( _i = 1, 2, 3,.
..., N). This final bevel position data matches the designated curve spherical surface K2, and the temporary bevel position data (θ1 _i , ρ1 _i , YK3
_i ) ( _i = 1, 2, 3,..., n).

Step 314: Bevel position data (θ1 _i , ρ1 _i , YK6 _i ) (
_i = 1, 2, 3,..., n) distance YK6 _i
Is the eyeglass frame shape data (θ1 _i , ρ1 _i , h0
_i ′) ( _i = 1, 2, 3,..., n) distance h
It determines whether within tolerance that is automatically specified based on 0 _i like. When it is within the allowable range, the process proceeds to step 315, and when it is not within the allowable range, the process returns to step 104.

Step 315: Based on the designated curve spherical surface K2, the angle of a tangent to the spherical surface K2 at a point on the spherical surface K2 corresponding to each bevel position point is calculated. As shown in FIG.
Each bevel position point on the XYZ coordinates (ie, measurement point P _i )
A tangent S3 in the specific radial direction corresponding to the point on the spherical surface K2 corresponding to the point, which is in contact with the spherical surface K2, is specified. Intersection angle Q2 _i with straight line S4 heading in the radial direction
Is calculated. This calculated data is converted into final bevel position data (θ1 _i , ρ1 _i , YK6 _i ) ( _i = 1, 2,
,..., N), which are converted into final processing data (θ1 _i , ρ1 _i , YK6 _i , Q2 _i ) ( _i
= 1, 2, 3,..., N) in the memory.

Step 316: After the final processing data is obtained, the operations and processes of steps 116 to 119 in mode 1 are performed. This again, each section is of being actuated on the basis of the final processed data, thus the horizontal slide shaft 20 is controlled its position based on the distance YK6 _i final processing data at each bevel position and lens rotation Shafts 8a, 8b
The angle of the grinding wheel swinging feed axis 55 is controlled so that the crossing angle Q2 _i against.

[0080] The finished spectacle lens by the mode 3, a certain percentage position of edge thickness w _i corresponding to each bevel n top and matches the spherical surface K2 of the curve value of bevel n top of the entire periphery is designated The direction of the bevel n at the peripheral arbitrary position, that is, the protruding direction toward the lens radial outside on a plane including the peripheral arbitrary position and the lens optical center line, and the lens optical center line A tangent line in which the inclination direction f1 with respect to the orthogonal direction is tangent to the arbitrary position point on the spherical surface K2 that matches the designated curve value in the radial direction corresponding to the arbitrary position point around the lens optical center C1. The result matches the direction of S3.

D) When the mode is shifted to the mode 4 Step 411: In a step 104, it is determined whether or not the priorities of the first to third machining modes are designated. When it is specified, the process proceeds to the next step, and when it is not specified, the process returns to step 104.

Step 412: The processing of the first-order processing mode is performed. At this time, if the first-order processing mode is frame copying, steps 111 to 113 are performed. If it is lens copying, only step 211 is performed. If it is curve specification, steps 311 to step 113 are performed. The processing up to 313 is performed.

Step 413: It is determined whether or not the position of the bevel in the first-order processing mode is within an allowable range. If it is within the allowable range, the process proceeds to the next step 414;
Go to 5.

Step 414: The processing of the first-order processing mode is continued. On this occasion,
Steps 115 to 119 when the first-order processing mode is frame copying, steps 213 to 215 when it is lens copying, and step 315 when it is curve specification.
To 316 are performed.

Step 415: Processing in the first-order processing mode is stopped, and processing in the second-order processing mode is performed. At this time, if the second-ranking processing mode is frame copying, steps 111 to 113 are performed. If it is lens copying, only step 211 is performed. If it is curve specification, steps 311 to step 113 are performed. The processing up to 313 is performed.

Step 416: It is determined whether or not the position of the bevel in the second-order processing mode is within an allowable range. If it is within the allowable range, the process proceeds to the next step 417;
Proceed to 8.

Step 417: The processing in the second-order processing mode is continued. On this occasion,
Steps 115 to 119 when the second-order processing mode is frame copying, steps 213 to 215 when it is lens copying, and step 315 when it is curve specification.
To 316 are performed.

Step 418: Processing in the second-order processing mode is stopped, and processing in the third-order processing mode is performed. At this time, if the third-order processing mode is frame copying, steps 111 to 113 are performed. If the processing mode is lens copying, only step 211 is performed. The processing up to 313 is performed.

The above described right eyeglass lens frame Rfr1
After that, the processing of the spectacle lens of the left spectacle lens frame Rfr2 is performed similarly. Although the device of the present invention is used and operates as described above, the details thereof can be arbitrarily changed, and all such modifications are included in the concept of the present invention.

[0090]

According to the present invention, the following effects can be obtained. That is, according to the spectacle lens of the first aspect, the top of the bevel around the entire circumference is matched with a fixed ratio position of the edge thickness at the position where it is located. A projection direction toward the lens radial outer side on a plane including the position and on the lens optical center line, and a tilt direction with respect to a direction orthogonal to the lens optical center line is on a lens copying spherical surface adapted to follow the bevel top. The bevel matches the direction of the bevel groove of the spectacle lens frame because the direction of the tangent line that comes into contact with the arbitrary position in the radial direction around the optical center of the spectacle lens corresponding to the arbitrary position is matched. It can be easily fitted to the spectacle lens frame, and especially, the position of the bevel accurately corresponds to the bend of the peripheral edge of the spectacle lens. The thickness of the edge of the spectacles further fitted to the spectacle lens frame becomes a uniform protruding state with respect to the spectacle lens frame, thereby improving the appearance of the spectacles. Suitable for frames. Also, since the bottom surface of the bevel at an arbitrary position in the circumferential direction is perpendicular to the inclination direction of the bevel with respect to the direction perpendicular to the lens optical center line, the bottom surface is less likely to interfere with the spectacle frame, and the framing can be easily performed. Will be able to

According to the eyeglass lens according to the second aspect, the top of the bevel around the entire periphery follows the bevel groove of the spectacle frame frame to which the eyeglass lens is fitted, and also fits the edge thickness of the peripheral edge of the eyeglass lens. The direction of the bevel at an arbitrary position on the peripheral edge, that is, a projecting direction toward the outside in the lens radial direction on a plane including the arbitrary position in the circumferential direction and on the lens optical center line, and the lens optical center The inclination direction with respect to the direction perpendicular to the line is in contact with the arbitrary position on the frame copying spherical surface adapted to follow the bevel groove of the spectacle frame in a radial direction around the optical center of the spectacle lens corresponding to the arbitrary position. The tangential direction of the bevel, the bevel is particularly accurately aligned with the bevel groove of the spectacle lens frame, so that the spectacle lens frame can be fitted more accurately. Can also be a hard spectacle lens frame orientation of even large spectacle lens frame Toka curve of the bevel becomes that exactly matches the depth direction of the V-shaped groove. Also, since the bottom surface of the bevel at an arbitrary position in the circumferential direction is perpendicular to the inclination direction of the bevel with respect to the direction perpendicular to the lens optical center line, the bottom surface is less likely to interfere with the spectacle frame, and the framing can be easily performed. Will be able to

According to the eyeglass lens processing method of the present invention, a lens tracing surface adapted to follow a bevel depending on the peripheral shape of the spectacle lens is specified, and the spherical surface corresponding to the lens optical center line is specified on this sphere. While specifying the virtual optical center line, specifying the virtual bevel corresponding to the bevel on the spherical surface, in a specific radial direction around the virtual optical center line corresponding to an arbitrary point of the virtual bevel, the spherical surface at the arbitrary point The spectacles according to claim 1, wherein a tangent line to be tangent is specified, and processing is performed so that an inclination direction of a bevel corresponding to the arbitrary point with respect to a direction orthogonal to the lens optical center line matches the direction of the tangent line. The lens can be easily and quickly manufactured by using the CNC device.

According to the method for processing a spectacle lens according to the fourth aspect, a frame copying spherical surface which is made to follow a bevel groove of a spectacle lens frame is specified, and virtual optics corresponding to the lens optical center line is specified on this spherical surface. Along with specifying the center line, specifying the position of the virtual bevel groove corresponding to the bevel groove on the spherical surface, in a specific radial direction around the virtual optical center line corresponding to an arbitrary point of the virtual bevel groove, at the arbitrary point 3. A tangent line which contacts the spherical surface is specified, and processing is performed so that an inclination direction of a bevel corresponding to the arbitrary point with respect to a direction orthogonal to the lens optical center line matches the direction of the tangent line. By using the CNC device, the described spectacle lens can be easily and quickly manufactured.

According to the eyeglass lens processing method of the present invention, since the bevel top position in the edge thickness direction is specified in relation to the edge thickness of the eyeglass lens peripheral edge, the peripheral edge of the eyeglass lens in the edge thickness direction is specified. The top of the bevel can be positioned at the optimum position, and the appearance of the spectacle lens after being framed in the spectacle lens frame is improved.

According to the eyeglass lens processing method of the present invention, the lens rotation axis for gripping the fabric lens, the horizontal slide axis for relatively sliding the lens rotation axis in the lens rotation axis direction, and the lens rotation axis A lens diameter feed axis for displacing the axis in a specific direction intersecting with the lens rotation axis, and a grindstone driven to rotate around a grinding wheel rotation axis made in a direction related to the lens rotation axis. A simple structure is provided because four axes consisting of a whetstone swinging feed axis for swinging around a fulcrum axis that intersects with the rotation axis are prepared, and the periphery of the spectacle lens is processed by controlling these four axes. Thus, the spectacle lens according to claims 1 and 2 can be processed more reliably and quickly.

According to the eyeglass lens processing method of the present invention, based on the eyeglass frame shape data and the lens processing data before processing, the position of the top of the bevel and the direction of the bevel relative to the direction perpendicular to the lens optical center line are determined. Processing data in which the inclination direction is specified for the entire periphery of the spectacle lens is created, and the bevel is processed based on the processing data, so that processing by a computer control device becomes possible. The eyeglass lens can be automatically and continuously manufactured based on data easily obtained by a known technique.

According to the eyeglass lens processing method of the present invention, based on the eyeglass frame shape data and the pre-processing lens measurement data, the position of the point of the bevel apex at each minute interval in the circumferential direction is specified. In a direction related to a specific diameter around a lens optical center line corresponding to the point at each circumferential direction minute interval, and by the lens copying spherical surface made to follow the bevel top of the spectacle lens by the lens measurement data before processing, and At a specific point corresponding to the arbitrary point on the spherical surface, processing data is created in which the direction of a tangent line that is in contact with the spherical surface is specified, and based on the processing data, the grinding wheel rotation axis is set to the tangent line. Since the bevel is machined while being swung in relation to the direction of the bevel, the bevel is automatically and continuously machined by the method according to claim 3 by a computer controller. It can, bevel of the spectacle lens according to claim 1 is obtained quickly and reliably.

According to the method for processing a spectacle lens according to the ninth aspect, based on the spectacle frame shape data and the lens measurement data before the processing, the position of the point of the bevel top at each minute interval in the circumferential direction is specified, and With a frame copying spherical surface made to follow the bevel groove of the spectacle lens frame by the spectacle frame shape data, in a direction related to a specific diameter around the lens optical center line at an arbitrary point in the longitudinal direction of the bevel groove, and At a specific point corresponding to the arbitrary point on the spherical surface, processing data is created in which a direction of a tangent line that is in contact with the spherical surface is specified, and based on the processing data, the grindstone rotation axis is set to the direction of the tangent line. Since the bevel is processed while being swung in relation to the above, the bevel is automatically and continuously processed by the method according to claim 4 by a computer controller. Rukoto can be obtained quickly and reliably bevel of the spectacle lens according to claim 2.

According to a tenth aspect of the present invention, there is provided an eyeglass lens processing apparatus, comprising: a lens rotation axis for gripping a fabric lens; a horizontal slide axis for relatively sliding the lens rotation axis in the lens rotation axis direction; A lens diameter feed axis for relatively displacing the lens rotation axis in a direction intersecting the lens rotation axis, and a grinding wheel that is driven to rotate around the grinding wheel rotation axis in the lens rotation axis direction intersects the lens rotation axis based on the processing data. A grinding wheel swinging feed shaft for relatively swinging around a fulcrum shaft is provided, so that the grinding wheel swinging feed shaft is simply provided in a known processing apparatus. 2 can be processed.

According to the spectacle lens processing apparatus of the eleventh aspect, the spectacle lens is provided with a chamfering grindstone for chamfering the peripheral edge of the spectacle lens, and the chamfering grindstone has two types of a rough processing portion and a finishing processing portion. Accordingly, the peripheral edge of the spectacle lens can be chamfered successively to the beveling, and the operation can be speeded up and the components of the apparatus can be shared.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of a processing apparatus according to the present invention.

FIG. 2 is a side view of the processing apparatus.

FIG. 3 is a process flowchart common to each processing mode.

FIG. 4 is a processing flowchart of a processing mode by frame copying.

FIG. 5 is a processing flowchart of a processing mode by lens copying.

FIG. 6 is a processing flowchart of a processing mode using a designated curve.

FIG. 7 is a processing flowchart of an automatic processing mode.

FIG. 8 is a front view of an eyeglass frame.

9A and 9B show details of measurement processing of the eyeglass frame, wherein A is a plan view in a measurement state, and B is a side view in the measurement state.

FIG. 10 is an explanatory diagram of data processing on rectangular coordinates.

11 shows a measurement state of a fabric lens to be processed, wherein A is a front view explanatory view and B is a side view explanatory view. FIG.

FIG. 12 is an explanatory diagram for determining the position of a bevel in frame copying.

FIG. 13 is a diagram showing a state in which a bevel is processed by the apparatus of the present invention.

FIG. 14 is a side sectional view of a spectacle lens, wherein A is a conventional example and B is related to the present invention.

FIG. 15 is a side view showing a relationship between a chamfering grindstone device and a beveled lens.

FIG. 16 is a diagram showing a state in which a specified curved spherical surface is specified on rectangular coordinates.

FIG. 17 is an explanatory diagram for determining the position of the bevel in the curve designation processing.

[Explanation of symbols]

8a Right lens rotating shaft 8b Left lens rotating shaft 41 Grinding stone rotating shaft 40 Grinding stone 20 Horizontal slide shaft 32 Lens diameter feed shaft 43 Support shaft 55 Grinding stone swinging feed shaft 63 Chamfering grindstone b1 Roughing part b2 Finishing part C0 Frame measurement Center line C1 Lens optical center f1 Inclination direction to the direction perpendicular to the lens optical center line of the bevel K1 Frame copying surface m Bevel groove n Bevel Re Fabric lens Rfr1 Right spectacle lens frame Rfr2 Left spectacle lens frame S2 Lens optical center line S3 tangential w _i edge thickness _{θ1 i, ρ1 i, h0 i} ' spectacle frame shape data _{θ1 i, ρ1 i, h1 i} , w i unmachined eyeglass lens measurement data _{θ1 i, ρ1 i, YK4 i} , the processing of copying _{Q i} frame data θ1 _i, of the copying ρ1 _{i, YK3 i,} Q1 _i lens Engineering data _{θ1 i, ρ1 i, YK6 i} , Q2 i specified curve of the processed data

Continuation of the front page (56) References JP-A-48-66296 (JP, A) JP-A-52-57652 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) G02C 7 / 02 B24B 9/14 G02C 13/00

Claims (11)

(57) [Claims] (1) a bevel groove along a circumferential direction of a frame;
The groove depth direction at any position in the circumferential direction of the
Eyeglasses that are gradually changing with changes in the camera circumferential position.
Framed in a frame,
The bevel fits over the entire length of the groove frame in the circumferential direction
And a bead on an arbitrary radial surface around the optical center line
Direction of the bevel fits on the arbitrary radius surface.
In the depth direction of the bevel groove at the circumferential position of the frame
The tilt direction is
Follows the shape of the top of the bevel that crosses and centers the lens optics
The lens copying sphere, which has a center on the line,
Corresponds to the top of the bevel in the tilt direction on the spherical surface
Of the straight lines tangent at the point
Eyeglasses that are aligned with the direction of the straight line
Lens. 2. A bevel groove along a circumferential direction of a frame.
The groove depth direction at any position in the circumferential direction of the
Eyeglasses that are gradually changing with changes in the camera circumferential position.
Framed in a frame,
The bevel fits over the entire length of the groove frame in the circumferential direction
And a bead on an arbitrary radial surface around the optical center line
The protrusion direction of the
In the depth direction of the bevel groove at the circumferential position of the frame
The direction of the inclination is
Lens that follows the shape of the bottom of the beveled groove
Frame copying sphere with center on optical center line
Of the bevel on the spherical surface in the projection direction
The arbitrary radius of the straight line tangent at the point corresponding to the top
The feature is that it is matched to the direction of the straight line included in the surface
Eyeglass lens to do . 3. A lens scanning sphere adapted to follow an imaginary bevel top depending on the peripheral shape of the spectacle lens, and a virtual optical center line corresponding to the lens optical center line is specified on the spherical surface. A virtual bevel corresponding to the top of the bevel is specified on the spherical surface, and a surface including an arbitrary point around the virtual optical center line of the virtual bevel and the virtual optical center line
A tangent line that comes into contact with the spherical surface at the arbitrary point is specified, and the virtual bevel existing at a position corresponding to the arbitrary point, to the outside of the lens diameter on a plane including the arbitrary point and the lens optical center line. A method for processing a spectacle lens, wherein a processing is performed such that an inclination direction with respect to a direction which is a protruding direction and which is orthogonal to a lens optical center line coincides with a direction of the tangent line. 4. A lens frame following a bevel groove of a spectacle lens frame is specified, a virtual optical center line corresponding to a lens optical center line is specified on the spherical surface, and a bevel on the spherical surface is specified. Identify the position of the virtual bevel groove corresponding to the groove, and
Specify a tangent to be in contact with the spherical surface at the arbitrary point on a plane including the virtual optical center line, and, for the virtual bevel existing at a position corresponding to the arbitrary point, the arbitrary point and the lens optical center line. The projection direction toward the outside of the lens diameter on the plane including the lens, and the inclination direction with respect to the direction orthogonal to the lens optical center line is processed so as to match the direction of the tangent line corresponding to the inclination direction. How to process eyeglass lenses. 5. An arbitrary position in the circumferential direction on a position corresponding to the shape of the spectacle lens frame on the front surface of the cloth lens specified by the shape of the spectacle lens frame to be fitted at the top of the bevel and the front surface of the cloth lens. And on a straight line parallel to the optical center line, passing through a point corresponding to the edge length, the bevel top position in the optical center line direction is specified in relation to the edge thickness which is the thickness of the fabric lens. The method for processing an eyeglass lens according to claim 3. 6. A lens rotation axis for gripping a fabric lens, a horizontal slide axis for relatively sliding the lens rotation axis in the direction of the lens rotation axis, and displacing the lens rotation axis in a direction orthogonal to the lens rotation axis. The lens diameter feed axis, and for rotating the grindstone driven to rotate around the grindstone rotation axis made in the same direction as the lens rotation axis around the fulcrum axis orthogonal to the lens rotation axis with respect to the lens rotation axis. A method for processing a spectacle lens, comprising preparing four axes including a whetstone rocking axis and processing the periphery of the spectacle lens by controlling these four axes. 7. A lens optical center line of an eyeglass lens frame.
Eyeglass frame shape data that specifies the bevel groove shape around the position and corresponding to the bevel groove shape of the fabric lens
Virtual bevel top position and virtual glasses based on the unprocessed lens measurement data obtained by measuring the position
On the plane including the arbitrary position of the lens periphery and the lens optical center line
An inclined direction relative to the lens a radial projecting direction toward the outward direction direction perpendicular to the lens optical center line in, to create a processed data as those specified for the entire periphery of the spectacle lens, on the basis of the machining data 7. The method for processing a spectacle lens according to claim 3, wherein the bevel is processed. 8. A position of a point at every minute interval in the circumferential direction of the top of the bevel based on the spectacle frame shape data and the lens measurement data before processing, and the position of the bevel top of the spectacle lens is determined based on the pre-processing lens measurement data. A specific point corresponding to the arbitrary point on the spherical surface in a direction related to a specific diameter around the lens optical center line corresponding to the point at each of the circumferential minute intervals by the lens copying spherical surface that is made to follow. Then, machining data is created in which the direction of the tangent line that comes into contact with the spherical surface is specified, and based on the machining data, the bevel is machined while swinging the grindstone rotation axis in association with the direction of the tangent line. 7. The method for processing an eyeglass lens according to claim 6, wherein: 9. Based on the spectacle frame shape data and the lens measurement data before processing, the position of a point at each minute interval in the circumferential direction of the top of the bevel is specified, and the bevel groove of the spectacle lens frame is specified by the spectacle frame shape data. By the frame copying spherical surface approximated so as to follow, in a direction related to a specific diameter around the lens optical center line at an arbitrary point in the longitudinal direction of the bevel groove, and at a specific point corresponding to the arbitrary point on the spherical surface. Then, processing data in which the direction of a tangent line that comes into contact with the spherical surface is specified is created, and based on the processing data, the bevel is processed while the grindstone rotating shaft is rocked in relation to the direction of the tangent line. 7. The method for processing an eyeglass lens according to claim 6, wherein: 10. A lens rotation axis for gripping a texture lens, a horizontal slide axis for relatively sliding the lens rotation axis in the lens rotation axis direction, and a lens rotation axis relative to a direction orthogonal to the lens rotation axis. A lens diameter feed shaft for displacing, and a grindstone swing for relatively rotating a grindstone rotationally driven around the grindstone rotation axis in the lens rotation axis direction around a fulcrum axis orthogonal to the lens rotation axis based on the processing data. An eyeglass lens processing apparatus comprising a moving feed shaft. 11. A chamfering grindstone for chamfering a peripheral edge of the spectacle lens, wherein the chamfering grindstone is of two types, one for rough machining and one for finishing.
The eyeglass lens processing apparatus according to the above.