JP2003172618A - Lens frame shape measuring device - Google Patents

Abstract

(57) [Summary] A lens frame shape measurement capable of accurately measuring the lens shape of a lens frame without error even if the center of rotation of the contact is not exactly coincident with the geometric center of the lens frame. Providing equipment. SOLUTION: Holding claws 43, 44 holding left and right lens frames LF, RF of an eyeglass frame (eyeglass frame) MF.
And a tracing stylus (contact) 216 that comes into contact with the left and right binocular lens frames LF and RF held by the holding claws 43 and 44, and the tracing stylus 216 measures the shape of the lens frames LF and RF. In the frame shape measuring apparatus, the rotation center OL or OR of the tracing stylus 216 is set to the lens frame L for each of the left and right eyes.
F, the rotational centers OL, OR of the tracing stylus 216 when placed in the RF, and the geometric centers GL, G of the lens frames LF, RF.
A lens frame shape measuring device including an arithmetic control circuit 270 for controlling a distance deviated from R to be substantially equal in the lens frames LF and RF of the left and right eyes.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lens frame shape measuring device for measuring the shape of a lens frame of an eyeglass frame with a contact.

[0002]

2. Description of the Related Art As a conventional lens frame shape measuring device, a lens frame holding means for holding the left and right lens frames of an eyeglass frame, a slide base held slidably in the arrangement direction of the left and right lens frames, A measuring unit moving driving means for driving the slide base forward and backward in a sliding direction; a rotation base held by the slide base so as to be horizontally rotatable; and a rotation driving means for rotationally driving the rotation base.
A slider that is held on the rotation base so as to be movable back and forth in the horizontal direction, a contactor that is held by the slider so as to contact the lens frame, and a measuring unit that measures the amount of horizontal movement of the contactor. And a control means for controlling the operation of each of the drive means.

In such a lens frame shape measuring device, the center of movement of the contactor, that is, the center of rotation of the rotation base is arranged in the lens frame of the spectacle frame, and the tip of the contactor is brought into contact with the groove of the lens frame. Accordingly, a lens frame shape measuring device for measuring the lens frame shape has been developed.

The center of rotation of movement of the contactor with respect to the left and right lens frames is set to a predetermined set position from the center of the main body of the lens frame shape measuring device regardless of the size and shape of the lens frame. Therefore, the amount of deviation from the geometric center of the lens frame differs depending on the size and shape of the lens frame.

For example, in recent years, a crab-shaped spectacle frame which has a narrow rim width in the direction perpendicular to the optical axis of the spectacle lens to be framed and is easily bent and deformed by an external force has become popular. It has become common for the center of rotation of the contactor and the geometric center of the lens frame to deviate.

Further, in a spectacle frame such as a titanium frame whose material is soft and whose lens frame (lens shape) is easily deformed, the rim surface is not polished (plated), and therefore compared with spectacle frames made of other materials. It is considered that the friction resistance of the lens frame groove is large.

Therefore, as shown in FIG. 22 (a), when the lens frame is held at a position where the contact angle at the time of contact with the lens frame groove of the contact becomes large, as shown in FIG.
The target lens shape measured as shown in (b) had a problem that partial unevenness due to stick slip was likely to occur.

[0008]

In order to eliminate such a problem, as shown in, for example, Japanese Patent Laid-Open No. 2-198756, the center of rotation of movement of the contact is moved to the geometric center of the lens frame. Is good.

However, it is very difficult to accurately move the center of rotation of movement of the contact to the geometric center of the lens frame.

Further, when the spectacle frame (spectacle frame) having such a lens frame is set in the lens frame shape measuring device, the set position of the spectacle frame, that is, the left and right centers of the spectacle frame is abbreviated to the lens frame shape measuring device. Place it in the center,
When measuring the shapes of the left and right lens frames of the spectacle frame, it is desirable to make the amounts of deviation between the center of rotation of movement of the contactor and the geometric center of the lens frames substantially equal in the left and right lens frames.

Therefore, a first object of the present invention is to accurately measure the lens shape of a lens frame without causing an error even if the center of movement of the contactor is not exactly aligned with the geometric center of the lens frame. An object of the present invention is to provide a lens frame shape measuring device that can be used.

A second object of the present invention is to set a spectacle frame (spectacle frame) on a lens frame shape measuring device.
The set position of the spectacle frame, that is, the left and right centers of the spectacle frame are easily disposed substantially at the center of the lens frame shape measuring device, and when the shape of the left and right lens frames of the spectacle frame is measured, the center of rotation of movement of the contactor and the lens An object of the present invention is to provide a lens frame shape measuring device capable of making the amounts of deviation from the geometric center of the frame substantially equal in the left and right lens frames.

[0013]

In order to achieve this first object, the invention according to claim 1 holds a lens frame holding means for holding the lens frames of the left and right eyes of a spectacle frame, and the lens frame holding means. In a lens frame shape measuring device that has a contactor that contacts the lens frames of the left and right eyes and that measures the shape of the lens frame with the contactor, the center of rotation of the contactor is for each of the left and right eyes. Lens frame shape provided with control means for controlling the distance between the center of rotation of the contactor and the geometric center of the lens frame when arranged in the lens frame to be approximately equal in the lens frames of the left and right eyes It is characterized in that it is a measuring device.

In order to achieve the above-mentioned second object, the invention of claim 2 has a lens frame holding means for holding the lens frames of the left and right eyes of the eyeglass frame, and the left and right eyes held by the holding means. In a lens frame shape measuring device for measuring the shape of the lens frame by the contactor, the lens frame holding means being arranged in each of the lens frames of the left and right eyes. When the distance between the center of rotation of the contactor and the geometric center of the lens frame is different, the lens frames for the left and right eyes are held based on the concentric index provided at the center of rotation of the rotation base. And a lens frame shape measuring device that does.

Further, in order to achieve the above-mentioned second object, the invention of claim 3 is the lens frame holding means for holding the lens frames of the left and right eyes of the spectacle frame, and the left and right eyes held by the holding means. A lens frame shape measuring device for measuring the shape of the lens frame by the contactor, wherein the center of rotation of the contactor is in each of the left and right eye lens frames. The lens frame holding means is provided with a calculating means for obtaining a displaced distance between the rotation center of the contactor and the geometric center of the lens frame when the lens elements are arranged, and the lens frame holding means determines the lens for each of the left and right eyes according to the calculation result of the calculating means. When the distance between the center of rotation of the contactor and the geometric center of the lens frame in the frame is different, the lens frames for the left and right eyes are held based on the concentric circular index provided at the center of rotation of the rotation base. Lens frame shape measurement Characterized in that the apparatus.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a lens frame shape measuring device according to the present invention will be described below with reference to the drawings.
In FIG. 2A, 1 is a frame shape measuring device, 2
Is a ball slicing machine (lens peripheral edge processing device) that grinds the lens to be processed into the shape of an eyeglass lens based on the eyeglass shape data from the frame shape measuring apparatus 1. For convenience of explanation,
The basic configuration operation of the frame shape measuring device 1 and the ball slide machine 2 will be described, and the configuration and operation which are the features of the present invention will be described in Measurement Example 4. (1) Frame shape measuring device 1 Frame shape measuring device (lens frame shape data input means)
As shown in FIG. 4, an opening 10 is formed at the center of the upper surface 10a.
It has a measuring device body 10 having b, and a switch portion 11 provided on an upper surface 10a of the measuring device body 10. The switch unit 11 includes a mode selector switch 12 for switching the left and right measurement modes and a start switch 1 for starting the measurement.
3 and a transfer switch 14 for data transfer.

Further, the frame shape measuring apparatus 1 has a spectacle frame holding mechanism (lens frame holding means) for holding the left and right lens frames LF and RF of the spectacle frame (spectacle frame) MF of the spectacles M as shown in FIG. 15, 15 'and its operating mechanism 16 (see FIG. 5 (a)), and the frame shape measuring unit (frame) which is supported by the measuring unit moving mechanism 200 and the measuring unit moving mechanism 100 as shown in FIG. Shape measuring means) 2
Has 00. The measuring unit moving mechanism 100 and the frame shape measuring unit 200 constitute a measuring element moving mechanism (contact moving mechanism).

The measuring section moving mechanism 100 moves the frame shape measuring section 100 between the eyeglass frame holding mechanisms 15 and 15 ', and the frame shape measuring section 200 uses the eyeglass frame M.
F, that is, the shape of the lens frame LF (RF) of the spectacle frame MF is measured. And these spectacle frame holding mechanism 1
5, 15 ′, the operating mechanism 16, the measuring unit moving mechanism 100, the frame shape measuring unit 200 and the like are provided in the measuring device body 10.

In FIG. 7, reference numeral 101 denotes a chassis arranged in the lower portion of the measuring device body 10. Also, FIG.
Among them, 17 and 18 are support frames which are fixed to the chassis 101 in the vertical direction and are provided in parallel with each other, and 19 is provided on the outer surface of the support frame 18 (the surface opposite to the support frame 17). Locking pin, 20 is an arcuate slit provided at the upper end of the support frame 18, 21 and 22 are the support frame 1.
7 and 18 are mounting holes. The mounting hole 22 is located between the arcuate slit 20 and the locking pin 19, and the arcuate slit 20 is provided concentrically with the mounting hole 22. <Operation Mechanism 16> The operation mechanism 16 includes an operation shaft 23 rotatably held in the mounting holes 21 and 22 of the support frames 17 and 18.
And a driven gear 24 fixed to one end of the operation shaft 23 (end on the side of the support frame 18), the support frame 18, and the measuring apparatus body 1
The rotary shaft 25 penetrating the front surface 10c of 0, the drive gear 26 fixed to (or integrally provided with) one end of the rotary shaft 25 and meshing with the driven gear 24, and attached to the other end of the rotary shaft 25. It has an operating lever 27. In the figure, 23a
Is a flat portion provided on the operating shaft 23, and the flat portion 23a is provided up to the vicinity of both ends of the operating shaft 23.

A concave portion 28 extending over the upper surface 10a and the front surface 10c is formed in the measuring device main body 10, an arcuate projection 29 is formed on the upper surface of the concave portion 28, and the upper surface 10a has a left and right side of the projection 29. "Open" and "Closed" are attached to the position. Then, the operation lever 2 described above is provided on the front surface of the recess 28.
7 is provided, and a bent portion provided on the upper end portion of the operation lever 27, that is, an indicating portion 27a moves on the protrusion 29.

A two-position holding mechanism for holding the frame (corresponding to the above-mentioned "closed") and releasing the frame-holding (corresponding to the above-mentioned "open") is provided between the driven gear 24 and the locking pin 19. (2
Position holding means) 30 is provided.

The two-position holding mechanism 30 includes the above-mentioned arcuate slit 20, a movable pin 31 projecting from the side surface of the driven gear 24 and penetrating the arcuate slit 20, a movable pin 31, and a locking pin 19. A spring (tensile coil spring) 32 is interposed between the two. Since the arcuate slit 20 is concentric with the mounting hole 22 as described above, the driven gear 24 and the operating shaft 23 are also concentric.
Therefore, the movable pin 31 is held by either one of the both ends 20a, 20b of the arcuate slit 20 by the tensile force of the spring 32.

Further, the operating mechanism 16 has a pair of cylindrical shafts 33, 33 held so as to be movable in the longitudinal direction of the operating shaft 23 and slightly rotatable in the circumferential direction. This cylinder shaft 3
3, the flat portion 33b of the circular insertion hole 33a and the operation shaft 23
As shown in FIGS. 5B and 5C, a slight gap S is formed between the flat portion 23a and the flat portion 23a. A string-shaped body 3 having elastic portions that can expand and contract due to its own elastic force on the cylindrical shafts 33, 33.
4 (only one of which is shown in FIG. 5A) are attached. The cord-shaped body 34 includes a spring (elastic portion) 35 whose one end is fixed to the cylindrical shaft 33, and a spring 35.
Has a wire 36 connected to the other end thereof. <Frame Holding Mechanisms 15 and 15 '> Since the frame holding mechanisms (glass frames) 15 and 15' have the same structure, only the frame holding mechanism 15 will be described.

The frame holding mechanism 15 has a pair of movable frames 37, 37 movably held in the horizontal direction and held in the measuring apparatus main body 10 so as to be relatively movable toward and away from each other. Each of the movable frames 37 is formed in an L shape from a horizontal plate portion 38 and a vertical plate portion 39 that is vertically connected to one end portion of the horizontal plate portion 38. The cylindrical shaft 33 is rotatably and immovably held in the vertical plate portion 39 in the axial direction.

Further, as shown in FIG. 6, the frame holding mechanism 15 includes a tension coil spring 40 interposed between the horizontal plate portions 38, 38 of the movable frames 37, 37, and a tip edge portion of the horizontal plate portion 38. Has a support plate 41 fixed to the center of the plate, and a claw mounting plate 42 arranged between a portion of the support plate 41 protruding above the horizontal plate portion 38 and the vertical plate portion 39. The claw attachment plate 42 is held by the support plate 41 and the vertical portion 39 so as to be rotatable around the shaft-shaped support protrusion 42c of the one side portion 42a.
Incidentally, the illustration of the shaft-shaped support projection on the rear side of the claw mounting plate 42 is omitted.

At the tip of the other side portion 42b of the claw mounting plate 42, a shaft-like tapered tapered holding claw 43 is provided in a protruding manner.
At the rear end of the other side of the claw mounting plate 42, a shaft-shaped holding claw 4 is provided.
The rear end of the No. 4 is rotatably held by the support shaft 45.
The holding claw 44 has a base 44a formed in a rectangular plate shape as shown in FIG. 5 (d) and a tip end formed in a tapered shape, and is rotated around a support shaft 45,
The holding claws 43 are relatively moved toward and away from each other. Moreover, the tip of the holding claw 44 and the claw mounting plate 42
Means that a torsion spring (not shown) wound around the support shaft 45 is always biased in the opening direction.

Further, the vertical plate portion 39 is provided with an L-shaped engaging claw 46 which is located above the holding claw 44. An edge-shaped claw portion 46 a extending below the tip of the engaging claw 46 is engaged with the holding claw 44. As a result, the other side portion 42b of the claw holding plate 42 is replaced by the one side portion 42b.
When rotated upward about a, the holding claws 43, 4
The interval of 4 is narrowed against the spring force of a torsion spring (not shown). Note that FIG. 5 (d)
As shown in, the edge claw portion 46a of the engaging claw 46 is
The holding claw 44 is engaged with a substantially central portion thereof. Also, the engaging claws 4
An idle pulley 47, which is rotatably held by the vertical plate portion 39, is arranged between the shaft 6 and the cylindrical shaft 33. The above-mentioned wire 36 is supported on the idle pulley 47,
The end portion of the wire 39 is positioned between the side portions 42a and 42b and fixed to the claw mounting plate 42.

Further, the movable frames 37, 37 are covered on the opposite side by a frame guide member 48 shown in FIGS. 4 and 6. The frame guide member 48 includes the horizontal plate portion 38.
A vertical plate portion 48a fixed to the tip of the vertical plate portion, a horizontal plate portion 48b fixed to the upper end of the vertical plate portion 39, and plate portions 48a, 48
It has an inclined guide plate portion 48c which is connected to a corner where b is continuous and is inclined toward the horizontal plate portion 48b. The vertical plate portion 48a has openings 48 corresponding to the holding claws 43 and 44.
d is formed, and the holding claw 44 is projected from the opening 48d. Further, the tip end portion of the holding claw 43 is located in the opening 48d when the holding claws 44 and 43 are opened to the maximum as shown in FIGS. 6 (a) and 6 (b).

In such a structure, the inclined guide plate portions 48c, 48c of the frame guide members 48, 48 are inclined so that they open toward each other toward the upper end. Therefore, the spectacle frame (spectacle frame) MF of the spectacles (spectacles)
Is disposed between the inclined guide plate portions 48c, 48c as shown in FIG. 6 (a), and the spectacle frame MF is pushed down against the spring force of the coil spring 40, the inclined guide plate portions 48c, 48c.
By the guide action of 8c, the frame guide members 48, 4
The intervals of 8 are widened, and the spectacle frame MF, that is, the lens frame LF (RF) of the spectacle frame MF is moved onto the holding claws 43, 43 and locked by the holding claws 43, 43.

In such a state, when the operation lever 27 is rotated from the "open" position to the "closed" position, this rotation is performed via the rotary shaft 25, the gears 26, 24 and the operation shaft 23, and the cylindrical shaft 33. When a part of the spring 35 is wound around the cylindrical shaft 33 by being transmitted to the claw mounting plate 42, the claw mounting plate 42 is rotated upward about the one side portion 42a via the wire 36 connected to the spring 35. Then, the distance between the holding claws 43 and 44 is narrowed as shown in FIG. 6C, and the spectacle frame MF, that is, the lens frame LF (RF) of the spectacle frame MF is held as shown in FIG. 6C.
Hold between 44. At this position, the movable pin 31 is held by the lower end portion 20a of the arcuate slit 20 by the spring force of the spring 32.

When the spectacle frame MF, that is, the lens frame LF (RF) of the spectacle frame MF is removed from between the holding claws 43 and 44, each member is operated as described above by operating the operation lever 27 in the opposite manner to the above. It works in reverse. <Measuring unit moving mechanism 100> This measuring unit moving mechanism 100
Are support plates 102 and 103 fixed on the chassis 101 at intervals in the arrangement direction of the frame holding mechanisms 15 and 15 ′,
At the upper part between the support plates 102 and 103, there is provided a guide rail 104 horizontally extending toward the left center in FIG. Two guide rails 104 are provided, but the other one is omitted. Also, these two guide rails 10
4, (other not shown) are arranged in parallel at intervals in the direction orthogonal to the plane of the drawing. 7 and 8 schematically show the measuring unit moving mechanism of FIG.

Further, the measuring section moving mechanism 100 is movable (slidable) in the horizontal direction (arrangement direction of the left and right lens frames of the spectacle frame) of the guide rail 104 (the other side is not shown). The feed screw 106 rotatably held by the support plates 102 and 102, which is positioned below the slide base 105 held by the guide rail 104 and the guide rail 104 (other side not shown), is driven to rotate. Motor for moving the measuring unit (driving means for moving the measuring unit) 1
Has 07. The motor 107 allows the slide base 105 to be slidably driven in the arrangement direction of the left and right lens frames of the spectacle frame to move back and forth.

The feed screw 106 is the guide rail 104.
The measurement unit moving motor 107 is fixed to the chassis 101. Moreover, slide base 1
A vertical plate portion 105a extending downward is integrally provided at 05, and a feed screw 106 is screwed to a female screw portion (not shown) of the vertical plate portion 105a. As a result, by rotating the feed screw 106, the slide base 105 can be moved left and right in FIG.

In FIG. 7, reference numeral 108 denotes a vertically extending support plate fixed on the left end of the chassis 101, and 109 denotes the support plate 10.
A holder support piece having a left end fixed to the upper end of 8 and a microswitch (sensor) 110 attached to the side surface of the tip end portion of the holder support piece 109. This micro switch 1
Reference numeral 10 denotes a lens holder 11 for holding a lens such as a template formed in a frame shape (lens shape) or a demo lens.
Used to detect 1. The micro switch 110 is attached to the support frame 17 or 18 of FIG. 5, and when the holding claws 43 and 44 hold the target lens holder 111,
The target lens holder 111 may be detected by the contact between the movable frames 37, 37.

The target lens holder 111 is used for the target lens holding plate portion 1.
A cross section is formed in an L shape from 11a and a lens-shaped feeler erection plate portion 111b that is continuously provided downward at one end of the lens-shaped holding plate portion 111a. The target lens shape holding plate portion 111a is integrally provided with a target lens shape holding boss portion 111c, and the target lens shape holding boss portion 111c holds the target lens shape 112.

In FIG. 7, reference numeral 113 denotes a fixing screw held at the other end of the target lens holding plate portion 111a. When the target lens holding plate portion 111a is fixed on the tip end portion of the holder supporting piece 109 by this fixing screw 113, The target lens shape holding plate portion 111a hits the sensing lever 110a of the microswitch 110, and the target lens shape 112
It is detected that the measurement is possible. <Frame Shape Measuring Unit 200> The frame shape measuring unit 200 shown in FIG. 7 includes a rotary shaft 201 that vertically penetrates the slide base 105 and is rotatably held by the slide base 105, and an upper end portion of the rotary shaft 201. Mounted on the rotary base 202, a timing gear 203 fixed to the lower end of the rotary shaft 201, a base rotary motor 204 fixed on the slide base 105 adjacent to the rotary shaft 201, and a base rotary motor (rotary Driving means) 204
Timing gear 205 fixed to the output shaft 204a of the
And a timing belt 206 stretched between the timing gears 203 and 205. The output shaft 204a
Penetrates through the slide base 105 and projects downward. Reference numerals 207 and 208 denote support plates projecting from both ends of the rotary base 202. With this configuration, the rotation base 202
Are held on the slide base 105 so as to be horizontally rotatable.

The frame shape measuring section 200 has a measuring section 210 and a tracing stylus position determining means 250. (Measurement Unit 210) The measurement unit 210 includes support plates 207, 20.
Two guide rails 211, (other not shown) bridged between the upper parts of 8 and a guide rail 211, (the other not shown) held on the guide rails 211, (otherwise not shown) so as to be movable back and forth in the longitudinal direction (horizontal direction). The slider 212, a measurement shaft 213 that vertically penetrates one end of the upper slider 212 in the moving direction, and a measurement shaft 213.
Roller 214 held at the lower end of the shaft, L-shaped member 215 provided at the upper end of the measuring shaft 213, and L-shaped member 2
Measuring element (contactor, feeler) 2 provided at the upper end of 15
Have 16. The tip of the probe 216 has a measuring shaft 213.
It is aligned with the axis of. The measuring axis 213
Is held by the upper slider 212 so as to be vertically movable and rotatable about its axis.

Moreover, the measuring section 210 includes the upper slider 21.
2 and moving element (contact piece) 216 which measures and outputs the moving amount (moving diameter ρi) along the guide rail 211 of the moving element (contact moving amount detecting means, rim width measuring means) 217
And a measuring means 218 for measuring and outputting the amount of vertical movement (Z-axis direction) of the measuring shaft 213, that is, the amount of vertical movement Zi of the tracing stylus 216. In this case, the measuring means 2
Reference numeral 18 denotes the rotation center of the rotation base 202, that is, the rotation shaft 2.
It is set to measure the distance from the center of rotation of 01 to the tip of the probe.

A magnescale or a linear sensor can be used as the measuring means 217 and 218, and the structure thereof is well known, and the description thereof will be omitted. In addition, the measuring unit 21
Reference numeral 0 denotes a lens-shaped measuring element 219 which is disposed on the other end of the upper slider 212 and has a horizontal cross section formed into a semi-cylindrical shape, and the lens-shaped measuring element 219 is tilted in the moving direction of the upper slider 212. It has a rotating shaft 220 freely attached to a protrusion 212a on the other end of the upper slider 212.

The measuring element 219 for the target lens shape has a rotary shaft 220.
And a switch operating piece 219b that projects laterally of the upper slider 212 and that is located in the vicinity of the upper surface of the upper slider 212. This upper slider 21
A spring 221 is interposed between the side surface of No. 2 and the side surface of the base of the upright drive piece 219a. Moreover, the spring 221 is positioned above the rotary shaft 220 in the state where the lens-shaped probe 219 is lying down as shown in FIG. 7B, the spring 221 moves the rotary shaft 220 to the rotary shaft 220 while holding the lens shape measuring element 219 upright as shown in FIG. 7B.
Is positioned below the target lens and is set so as to hold the lens-shaped measuring element 219 in the standing position.

At this standing position, the lens-shaped measuring element 21
Reference numeral 9 denotes a stopper (not shown) which is prevented from falling to the right side in FIG. In addition, on the side surface of the upper slider 212, the micro switch (sensor) 222 as a means for detecting that the target lens 219 is lying down, and the target lens 219 is detected to be upright. A micro switch (sensor) 223 is provided as a means for doing so.

Moreover, in the state of FIG. 7 (a), the motor 107 for moving the measuring portion is operated to move the slide base 10
5 is moved to the left in FIG. 7, the tip of the upright driving piece 219a causes the edge of the edge holder 111 of the edge feeler upright plate portion 11 to rise.
Upon hitting 1b, the lens-shaped probe 219 is rotated clockwise about the rotation shaft 220 against the spring force of the spring 221. With this rotation, when the spring 221 moves upward beyond the rotary shaft 220, the spring force of the spring 221 raises the lens-shaped probe 219, and the lens-shaped probe 219 is not shown. By the action of the stopper and the spring 221, it is held in the standing position as shown in FIG. 7 (b).

The microswitch 222 is directly attached to the measuring surface of the lens-shaped probe 219 when the lens-shaped probe 219 is laid down.
When turned on, the micro switch 223 turns the measuring element 2 for the target lens shape.
It is adapted to be turned on by the switch operation piece 219b when 19 is erected. Reference numeral 208a is a stopper provided on the support plate 208, 224 is an arm attached to the support plate 208, and 225 is a microswitch (sensor) attached to the tip of the arm 224. In the micro switch 225, the upper slider 212 has the slider stopper 20.
It is turned on when it comes into contact with 8a to detect the initial position of the upper slider 212. (Measuring force adjusting means PS) This measuring force adjusting means (measuring force changing means, pressing force adjusting means) PS includes supporting plates 207, 20.
Two guide rails 251, which are bridged between the lower parts of 8 and provided in parallel with the guide rail 211 (other not shown)
And the guide rail 25 that is positioned below the arm 224.
1, a first lower slider 400 movably held in a longitudinal direction (the same direction as the upper slider 212) (not shown).
And a drive motor 401 fixed to the rotation base 202 and located below the lower slider 400. Rack teeth 402 are arranged in the moving direction on the lower surface of the first lower slider 400, and an output shaft 401a of the drive motor 401 is formed.
A gear 403 that meshes with the rack teeth 402 is fixed to the. In addition, the arm 224 includes a first slider 400.
Microswitches 404 and 405 for detecting the position of the first slider are fixed at intervals in the moving direction of.

Further, a pulley 226 is rotatably held on the upper side surface of the support plate 207, one end of a wire 227 is fixed to one end of the upper slider 212, and one end of a spring 228 is fixed to the other end of the wire 227. Is locked, and the other end of the spring 228 is attached to the tip of the first slider 400. The wire 227 is connected to the pulley 226.
Have been hung over. (Sensor positioning device 250) This probe positioning device 25
Reference numeral 0 denotes the above-described two guide rails 251, (the other side not shown), the second lower slider 252 movably held in the longitudinal direction by the guide rail 251, (the other side not shown),
The rotary base 2 is located below the lower slider 252.
Drive motor 253 fixed to 02 and the drive motor 25
3, a locking pin (stopper) 254 is provided so as to project near the center of the side surface of the rotary base 202.

Rack teeth 25 are provided on the lower surface of the lower slider 252.
5 are arranged in the movement direction, and locking pins (stoppers) 256, are formed on the side surface of the lower slider 252 at intervals in the movement direction.
257 is provided so as to project, and a gear 258 that meshes with the rack teeth 255 is fixed to the output shaft of the drive motor 253. Moreover, the locking pin 256 is positioned slightly above the locking pin 257, and the shaft elevating operation member 259 is disposed on the side of the lower slider 252.

The shaft raising / lowering operation member 259 is used for the locking pin 2.
The long piece 259a disposed between 56 and 257 and the long side 25
Short piece 2 integrally provided at the lower end of 9a in a diagonally downward direction
It is formed in an L shape from 59b. The shaft raising / lowering operation member 259 has a bent portion rotatably held by a rotating shaft 260 at an intermediate portion in the vertical direction on the side surface of the lower slider 252. In addition, the tip of the short piece 259b and the lower slider 252
A spring 261 is interposed between the upper side surface and the upper side surface.

The spring 261 has a rotating shaft 260 at a position where the long piece 259a is in contact with the locking pin 256.
When the long piece 259a is pressed to the locking pin 256 at a higher position and the long piece 259a is in contact with the locking pin 257, the long piece 259a is positioned below the rotation shaft 260 and the locking pin 2 is located.
The long piece 259a is pressed against 57.

A support plate 262 extending upward is provided at one end of the lower slider 252, and a pressing shaft 263 penetrating the upper end of the support plate 262 is held so as to be movable back and forth in the moving direction of the lower slider 252. Has been done. This pressing shaft 2
A retainer 264 for retaining is attached to one end of 63, and a large-diameter pressing portion 263a facing one end surface 212b of the upper slider 212 is integrally provided at the other end of the pressing shaft 263. A spring 265 wound around the pressing shaft 263 is interposed between the portion 263a and the support plate 262. Then, the pressing portion 263a is provided on the upper slider 2
The springs 228, 26 are provided on one end face 212 b of the spring 52.
They are brought into contact with each other by the spring force (urging force) of 5.

Frame shape measuring apparatus 1 having such a structure
As described later, the eyeglass frame F or the target lens shape is angled by θ.
It is possible to obtain the radius vector ρi with respect to i, that is, the lens shape information (θi, ρi) in the polar coordinate format. (Control Circuit of Target Shape Measuring Device) Operation signal (ON) from the mode changeover switch 12, the measurement start switch 13 and the data transfer transfer switch 14 described above.
The OFF signal) is input to the arithmetic control circuit (control means) 270 shown in FIG. Moreover, the light emitting diode LE corresponding to each switch 12, 13, 14
The operations of D1 to D4 are controlled by the arithmetic control circuit 270.

Further, the above-mentioned microswitch 110,
The detection signals from 222, 223, 225, 404, 405, etc. are input to the arithmetic control circuit 270 shown in FIG. 3, and the measurement signal from the radius vector measuring means 217 and the measurement signal from the measuring means 218 are arithmetic control circuit 270. Entered in. Further, the arithmetic control circuit 270 is used for the measuring unit moving motor 1
07, base rotation motor 204, drive motors 253, 4
01 is driven and controlled. Further, the arithmetic control circuit 270 is connected to a memory (storage means) 271 for storing measurement data. This arithmetic control circuit 270
Functions as frame shape recognition means and measurement control means. (2) Ball Shaving Machine 2 As shown in FIG. 2A, the ball shaving machine 2 has a processing unit 60 (details not shown) for grinding the peripheral edge of the lens to be processed. In the processing section 60, a lens L to be processed is provided between a pair of lens rotation axes 304 of a carriage (not shown).
(See FIG. 9), the lens rotation shaft 304,
The rotation of 304 and the vertical rotation of the carriage are controlled based on the lens shape information (θi, ρi), and the peripheral edge of the lens to be processed is ground by a rotating grinding wheel. Since this structure is well known, its detailed description is omitted.

This ball slicing machine 2 has an operation panel section (keyboard) 61 as data input means, a liquid crystal display panel (display device) 62 as display means, and controls the processing section 60 and the liquid crystal display panel 62. It has a control circuit (control means) 63 (see FIG. 1).

Further, as shown in FIG. 9, the ball slicing machine 2 uses the target lens shape information measured by the frame shape measuring device 1, that is, the lens shape information (θi, ρi) to calculate the edge thickness of the lens to be processed. And a lens thickness measuring device (lens thickness measuring means) 300 for measuring. This lens thickness measuring device 30
The structure and operation of 0 are the same as those described in detail in Japanese Patent Application No. 1-9468. <Lens Thickness Measuring Means> A lens thickness measuring device (lens edge shape data inputting means) as the lens thickness measuring means (lens edge thickness measuring means) has a stage 331 which is moved back and forth by driving a pulse motor 336. Further, the lens thickness measuring device uses the stage 3 in order to hold the lens L to be processed.
31 includes feelers 332 and 334. The feelers 332 and 334 are biased by springs 338 and 338 in a direction in which they approach each other, and are always in contact with the lens L on the front surface (front refraction surface) and the rear surface (rear refraction surface). The feelers 332 and 334 are shown in FIG.
As shown in (A), it has discs 332a and 334a that are rotatably supported and have a radius r. Further, the lens thickness measuring device has encoders 333 and 335 that detect the movement amounts of the feelers 332 and 334.

On the other hand, the lens rotation shafts 304, 304 of the carriage (not shown) are rotatably driven by the pulse motor 337.
The lens L is sandwiched between the four. As a result, the lens L is rotationally driven by the pulse motor 337. The optical axis OL of the lens L is aligned with the axis of the rotating shafts 304, 304.

The radial information (angle information θi 'out of ρi, θi) is input to the pulse motor 337 from the memory 90, and the lens L is rotated from the reference position by the angle θi according to the angle information. The radial length ρi is input to 336, and the feelers 332 and 334 are transmitted via the stage 331.
The circular plates 332a and 334a are moved back and forth to be positioned at the radial length ρi from the optical axis OL as shown in FIG. Then, the feelers 332 and 334 at this position in FIG.
Encoders 333 and 335 detect the movement amounts ai and bi in (A), and the detection signals from the encoders 333 and 335 are input to the arithmetic / determination circuit 91.

The calculation / judgment circuit 91 operates as follows: bi-ai = Di, D
i−2r = Δi is calculated to calculate the lens thickness Δi. <Control means, etc.> As shown in FIG. 2B, the operation panel section 61 has an "auto" mode for bevel grinding of the lens periphery and the lens periphery and a "monitor" mode for manual operation. Switch 6 for the processing course to switch
4. "Frame" to select the material of eyeglass frame
A mode switch 65, a "frame change" mode switch 66 for processing to replace the old lens with a new frame, and a "mirror surface" mode switch 67 for mirror surface processing are provided.

Further, the operation panel portion 61 has a pupil distance PD, a frame geometric center distance FPD, and an amount of upper alignment "U".
Switch 68 for "input change" mode such as "P", "+"
Input setting switch 69, “-” input setting switch 70, cursor key 71 for moving the cursor frame 71a, switch 7 for selecting glass as the lens material
2. A switch 73 for selecting plastic as the lens material, a switch 74 for selecting polycarbonate as the lens material, and a switch 75 for selecting acrylic resin as the lens material are provided.

Further, on the operation panel portion 61, a start switch such as a switch 76 for "left" lens grinding processing, a switch 77 for "right" lens grinding processing, and "refinish / trial".
Mode switch 78, "Grinding wheel rotation" switch 7
9, a switch 80 for stop, a switch 81 for requesting data, a switch 82 for screen, a switch 83, 84 for opening and closing between a pair of lens rotation shafts in the processing unit 60, and a switch 85 for starting lens thickness measurement, Setting switch 8
6 and the like are provided.

As shown in FIG. 1, the control circuit 63 controls the lens shape information (θi, ρi) from the frame shape measuring device 1.
And a calculation / determination circuit (calculation control circuit (calculation means)) 9 to which lens shape information (θi, ρi) from the lens frame shape memory 90 is input.
1, a suction cup shape memory 92, a liquid crystal display panel (display means) 62 by constructing image data based on the data from the arithmetic / determination circuit 91 and the suction cup shape memory 92.
An image forming circuit 93 for displaying an image and data on the display, an image forming circuit 93, an operation panel section (bevel shape data input means) 61, a warning buzzer 62, etc., by a control command from an arithmetic / determination circuit 91 which is an arithmetic control means. A control circuit 94 for controlling, a processing data memory 95 for storing the processing data obtained by the arithmetic / determination circuit 91, and operation control of the processing section 60 described above based on the processing data stored in the processing data memory 95. The processing control unit 96 is included. [Operation] Next, the arithmetic control circuit 270 of the apparatus having such a configuration
The control by the arithmetic / determination circuit (arithmetic control circuit) 91 will be described. (i) Holding of the eyeglass frame (eyeglass frame) MF in the frame shape measuring device 1 With such a configuration, when the shape of the eyeglass frame (eyeglass frame) MF of the eyeglass (eyeglass) is measured, FIGS. The target lens holder 111 shown in (1) is removed from the holder support piece 109. Incidentally, in such a configuration, the inclined guide plate portions 48c, 48c of the frame guide members 48, 48 are
They are inclined so that they open toward each other toward the upper end.

Therefore, the spectacle frame (spectacle frame) MF of the spectacles (spectacles) is tilted as shown in FIG.
When the spectacle frame MF is disposed between c and 48c and is pushed down from above against the spring force of the coil spring 40, the space between the frame guide members 48 and 48, that is, the space between the frame guide members 48 and 48, is generated by the guide action of the inclined guide plate portions 48c and 48c. Movable frame (slider)
37, 37 is widened so that the rim of the spectacle frame MF, that is, the lens frame LF (RF) of the spectacle frame MF is held by the holding claws 43, 4.
3 is moved to the upper position and locked by the holding claws 43, 43. At this position, the portions above and below the lens frames (rims) LF and RF are held by the spring force of the coil spring 40 between the vertical plate portions 48a and 48a of the frame guide members 48 and 48.

In such a state, when the operation lever 27 is rotated from the "open" position to the "closed" position, this rotation is performed through the rotary shaft 25, the gears 26, 24 and the operation shaft 23, and the cylinder shaft 33. When a part of the spring 35 is wound around the cylindrical shaft 33 by being transmitted to the claw mounting plate 42, the claw mounting plate 42 is rotated upward about the one side portion 42a via the wire 36 connected to the spring 35. Then, the distance between the holding claws 43 and 44 is narrowed as shown in FIG. 6C, and the rim of the spectacle frame MF, that is, the lens frame LF (RF) of the spectacle frame MF is held as shown in FIG. 6C. Held in between. In this position, the movable pin 3
1 is a spring 32 at the lower end 20a of the arcuate slit 20.
It will be held by the spring force.

When removing the rim of the spectacle frame MF, that is, the lens frame LF (RF) of the spectacle frame MF from between the holding claws 43 and 44, the operation lever 27 is operated in the reverse manner to the above-mentioned members. However, the operation is the reverse of the above. (ii) Lens shape measurement A. Shape measurement of lens frame (lens shape) of spectacle frame [Measurement of rim width (rim thickness) of lens frame] As described above, the rim of the spectacle frame MF, that is, the spectacle frame MF between the holding claws 43 and 44 of the movable frames 37 and 37. In the state in which the lens frame LF is held, the tracing stylus 216 faces the substantial center of the space inside the lens frame LF from below.

On the other hand, the power of the frame shape measuring device 1 is turned on.
Then, in the arithmetic control circuit 270 (arithmetic means) which is the arithmetic / judgment means (arithmetic / judgment control circuit) of the frame shape measuring apparatus 1, the micro switches 110, 222, 223
The signal from 225 is input. Then, the arithmetic control circuit 270 controls the microswitches 110, 222, 22.
The detection states of 3,225 are determined. In FIG. 11 (a), the long piece 259a of the shaft raising / lowering operation member 259 is in contact with the locking pin 257 by the spring force of the spring 261, and at this position, the tracing stylus 216 is located at the standby position (a). ing. The measurement will be described, for example, in a state in which the lens frame RF is set after the lens frame LF of the eyeglass frame MF is measured.

When the start switch 13 is turned on at the standby position (a), the arithmetic control circuit 270 drives and controls the measuring unit moving motor 107 to rotate the feed screw 206 and move the slide base 105 to the measuring unit. The motor 107 is moved to the side. As a result, the rotary base 202 is moved integrally with the slide base 105 toward the measuring unit moving motor 107, and the rotary base 202 is moved.
The probe 216 of the measuring shaft 213 supported by the upper slider 212 is brought into contact with one vertical plate portion 48a of the movable frames 37, 37 as shown in FIG. Then, in the arithmetic control circuit 270, the tracing stylus 216 is arranged in the vertical plate portion 48 of the movable frame 37.
When receiving the detection signal from the radius vector measuring means 217 when it is brought into contact with a, the measuring unit moving motor 107 is stopped.

Along with this, the arithmetic control circuit 270 obtains the moving amount of the slide base 105 from the driving amount of the measuring unit moving motor 107 until the measuring unit moving motor 107 is stopped, and measures the moving amount and the radius vector. The position of the probe 216 is obtained from the detection signal from the means 217, and this position is stored in the memory 271 as the rim outer surface position.

After that, the arithmetic control circuit 270 reverses the motor 107 for moving the measuring unit to drive the slide base 105 in the direction opposite to the motor 107 for moving the measuring unit, so that the tracing stylus 216 is inside the lens frame LF. Then, the motor 107 for moving the measuring unit is stopped.

Next, the arithmetic control circuit 270 determines the drive motor 2
53 is operated to rotate the gear 258 in the clockwise direction as shown by the arrow A1, the lower slider 252 is moved to the right in the figure, and the upper slider 212 is moved by the pressing shaft 263 to the arrow A2.
As shown in, the shaft lifting / lowering operation member 2 is moved to the right in the drawing.
The long piece 259b of 59 is brought into contact with the locking pin 254.

After that, the arithmetic and control circuit 270 further moves the lower slider 252 to the right to make the shaft elevating and lowering operation member 259.
Is rotated clockwise about the rotation shaft 260 as indicated by an arrow A3, and the measurement shaft 213 is moved (raised) upward from the standby position (a) by the shaft raising / lowering operation member 259 via the roller 214. Let Accordingly, the spring 261
Is moved above the rotary shaft 260, the shaft lifting operation member 2
59 is rapidly rotated upward by the spring force of the spring 260, the long piece 259a of the shaft elevating operation member 259 collides with the locking pin 254, and the measurement shaft 213 is moved upward by the inertial force at this time. Then, the tracing stylus 216 is abruptly raised to the honeycomb position (b) at the substantially upper edge of the lens frame LF.

After this, the measuring shaft 213 and the tracing stylus 216.
Is slightly lowered, the roller 214 contacts the short piece 259b, and the tracing stylus 216 faces the valley portion of the bevel groove (lens frame groove) of the lens frame LF as shown in FIG. 11C. Position) (C).

When the tracing stylus 216 is raised to the tracing stylus insertion position (C) with such movement, the micro switch 225 is turned on by the upper slider 212.
Then, the arithmetic control circuit 270 uses the micro switch 22.
When receiving the ON signal from 5, the drive motor 253 is rotated in the reverse direction, the gear 258 is rotated counterclockwise as indicated by arrow A4 in FIG. 11B, and the lower slider 252 is indicated by arrow A5. Similarly, the tip end of the tracing stylus 216 is engaged with the valley portion (center) of the bevel groove (lens frame groove) 51 of the lens frame LF as shown in FIGS. 8B and 12B.

Then, the arithmetic and control circuit 270 is connected to the measuring element 2
Upon receiving a detection signal from the radius vector measuring means 217 when the tip of 16 contacts the valley of the bevel groove 51 of the lens frame LF, the driving of the drive motor 253 is stopped. At this time, the arithmetic control circuit 270 obtains the position of the tracing stylus 216 from the drive amount of the drive motor 253 and the detection signal from the radius vector measuring means 217, and determines this position as the rim groove position (bevel groove position, lens frame groove position). ) Is stored in the memory 271. Then, the arithmetic control circuit 270 obtains the difference between the rim outer surface position and the rim groove position, and stores this difference in the memory 271 as the rim width (rim thickness) Lt of the lens frame LF.

Further, as shown in FIG. 21, an arithmetic operation circuit
270 is a lens frame of the liquid crystal display panel (display device) 62 of FIG.
The rim thickness of the left and right lens frames FR, FL can be displayed numerically instead of the side image of the spectacle lens inserted in FR, FL. B. Measurement of the lens shape of a normal lens frame After this, the lower slider 252 is further moved to the position shown in FIG.
When it is moved to the left as shown by the arrow A5 in (b), the pressing portion 263a of the pressing shaft 263 is separated from the upper slider 252 as shown in FIG. 8 (b).
At this position, the tracing stylus 216 comes into contact with the valley portion of the bevel groove (rim groove or lens frame groove) 51 of the lens frame LF as shown in FIG. 8B, and the tracing stylus 216 is caused by the spring force of the spring 228 to make the lens frame. It is biased to the valley portion of the bevel groove (rim groove or lens frame groove) 51 of the LF.

In this state, the arithmetic and control circuit 270 rotates the base rotary motor 204 to cause the probe 2 to move.
The tip of 16 is moved along the bevel groove of the lens frame LF. At this time, the upper slider 212 is moved along the guide rail 211 according to the shape of the bevel groove, and
The measuring shaft 213 is moved in the vertical direction according to the shape of the bevel groove.

The movement of the upper slider 212 is detected by the radius vector measuring means 217, and the vertical movement of the measuring shaft 213 is detected by the measuring means 218.

The radius vector measuring means 217 is used for the support plate 2
The amount of movement of the upper slider 212 from the position of contacting the stopper 208a of No. 08 is detected. This measuring means 217, 2
The output of 18 is input to the arithmetic control circuit 270.

The arithmetic control circuit 270 is used in the measuring means 21.
Based on the output from 7, the radius vector ρi of the valley portion of the bevel groove of the lens frame LF is obtained, and the radius vector ρi is associated with the rotation angle θi of the base rotary motor 204 to obtain the radius vector information (θi, ρi). This radius vector information (θi, ρi) is stored in a memory (not shown). On the other hand, the arithmetic control circuit obtains a vertical movement amount (Z-axis direction) Zi based on the output from the measuring means 218, and associates the movement amount Zi with the rotation angle θi and the radius vector ρi. The mold shape information (θi, ρi, Zi) is obtained, and the target lens shape information (θi, ρi, Zi) is stored in the memory 271. C. Identification and Shape Measurement of Lens Frame for Crab Eye Glasses Further, a case of measuring a claw eyeglass frame 272 having a lens frame 272F for crab eye glasses as shown in FIG. 13 will be described. (1) Measurement Example 1 First, FIG. 13A shows a lens frame 272 for crab glasses.
As described above, the arithmetic control circuit 270 makes the arithmetic control circuit 270 determine whether the lens frame to be measured is a lens frame for crab glasses or a normal lens frame by sandwiching it between the movable frames 37, 37.

Here, the center between the movable frames 37, 37 and the center of the lens frame 272 (the center between the rims 272a, 272b) is the movement start position of the tip of the tracing stylus 216. When the lens frame 272 for crab glasses is viewed from the front, the measurement start position Rm1 is near the center of the lower rim 272a of the lens frame 272. 272b is an upper rim of the lens frame 272.

First, the arithmetic control circuit 270 drives and controls the drive motor 107 with the drive motor 253 to position the upper slider 212 at the position shown in FIG. And the drive motor 204 is controlled to drive the rotary shaft 2
01, the rotation base 202 is rotated to position the tip of the tracing stylus 216 at the movement start position P1 in FIG. 13 (c).

At this measurement start position P1, the tracing stylus 216
Is at the center of the lower rim 272a (measurement start position Rm
In 1), the lens frame 272 faces a lens frame groove (not shown) (substantially the same shape as the bevel groove 51).

Next, the arithmetic control circuit 270 determines the drive motor 2
The lower slider 252 is controlled to drive 53 to move the lower slider 252 leftward as indicated by an arrow A5 in FIG.
Move a to the left. At this time, the upper slider 212 moves to the left following the movement of the pressing portion 263a by the spring force of the spring 228, and the probe 2 of the upper slider 212 moves.
The tip of 16 moves to the position P2 near the center of the lower rim 272a of the lens frame 272 of FIG.
The tip of 16 abuts on a bevel groove (not shown) of the lens frame 272 (the same as the bevel groove 51) at the measurement start position Rm1.

Thereafter, the arithmetic control circuit 270 further drives and controls the drive motor 253 to move the lower slider 252 to the position shown in FIG.
(B) By further moving to the left as shown by the middle arrow A5 to move the pressing portion 263a to the left, the pressing portion 263a is separated from the upper slider 212 as shown in FIG. 8B.

At this time, the arithmetic and control circuit 270 moves the probe 216 from the movement start position P1 of the probe (contact) 216.
Up to the position P2 where the first contact with the lower rim 272a,
The moving amount of the tracing stylus 216 is detected by the radius vector measuring means (contact moving amount detecting means) 217. Then, the arithmetic control circuit (lens frame shape identifying means) 270 identifies the lens frame shape of the eyeglass frame from the detected movement amount of the tracing stylus 216. That is, the arithmetic and control circuit 270 uses the radius vector measuring means 21.
The distance from the rotation center O of the tracing stylus 216 to the measurement start position Rm1 is obtained based on the measurement signal of No. 7, and when the obtained distance is a predetermined value (for example, 12 mm) or less, the lens frame to be measured has a crab eye. It is determined to be the lens frame 272 for glasses.

Here, assuming that the rotation speed of the drive motor 204 at the time of measuring a normal lens frame is N rpm, the drive motor 204 is drive-controlled at this rotation speed to rotate the rotary shaft 201 and the rotation base 202, and the measurement is performed. It is assumed that the child 216 is rotated (rotated about the rotation center O) to measure the shape of the lens frame. When the rotation speed of the tracing stylus 216 at this time is a normal rotation speed (Fast), when the lens frame to be measured is formed of a soft material or the like for the lens frame 272 for the crab eye glasses, the claw eye glasses are used. When the shape of the lens frame of the lens frame 272 for eyeglasses is measured by a tracing stylus 216 that rotates (moves) at a normal rotational speed, the lens frame 272 for crab-eye glasses shows a broken line 273 as shown in FIG. 13B. As shown, it is deformed by the moving force of the tracing stylus 216, that is, the shape of the lens frame on the ear hook side or the nose pad side of the lens frame 272 for crab eye glasses is deformed and bent, and an accurate radius vector cannot be measured. It will be.

Therefore, when it is determined that the lens frame measured as described above is the lens frame 272 for crab-eye glasses, the arithmetic control circuit 270 causes the rotation speed of the drive motor 204 to be slower than Nrpm NSrpm ( For example, NS
= N / 2 rpm), the moving speed of the tracing stylus 216, that is, the rotational speed of the rotary shaft 201 and the rotary base 202 is slowed down, and a sequence of slow rotation is measured.

Then, the arithmetic and control circuit 270 causes the tracing stylus 216 to measure the lens frame shape of the lens frame 272 for crab glasses in accordance with this slow rotation sequence. In this case, since the rotating speed of the tracing stylus 216 becomes sufficiently slower than the normal rotating speed, the tracing stylus 216 does not deform the rim of the lens frame 272 for the crab eye glasses as shown in FIG. 13C. taking measurement. As a result, the shape of the lens frame on the ear-hook side or the nose pad side of the lens frame for crab-eye glasses formed of a soft material or the like is not deformed or bent. Since there is no need to measure the shape, accurate lens frame shape measurement can be realized. (2) Measurement Example 2 Further, the arithmetic control circuit (moving speed control means) 270 has a predetermined angular range α1 on the nose pad side of the lens frame 272 of the eyeglass frame (eyeglass frame) for crab eye glasses or the ear hook side. The rotational speed of the probe (contact) 216 is slowed (low) within the predetermined angle range α2, and the other angle range β
In 1 and β2, the rotation speed of the tracing stylus 216 can be changed to the normal rotation speed.

In this case, the speed becomes slow at the portion where the rim of the lens frame 272 for the crab eye glasses 272 in the predetermined angle range α1 on the nose pad side or the predetermined angle range α2 on the ear hanging side is easily deformed. In this part, the lens frame 272 for the crab glasses does not deform due to the rotational speed of the tracing stylus 216. Moreover, in the range of the angle ranges β1 and β2, the upper rim 272a and the lower rim 272b of the lens frame 272 for crab glasses are close to a straight line, so the angle ranges β1, β1
Even if the moving speed of the tracing stylus 216 is increased to the normal rotation speed in the range of β2, the upper rim 272a and the lower rim 272b are not deformed by the rotation of the tracing stylus 216. Therefore, the angular range β
By increasing the moving speed of the tracing stylus 216 to the normal rotation speed in the range of 1, β2, the lens frame 27 for crab eye glasses
The measurement time of the lens frame shape of No. 2 can be shortened as compared with the measurement example 1 of (1). (3) Measurement Example 3 (Preliminary Measurement) First, the lens frame 272 for crab glasses is sandwiched between the movable frames 37, 37 as shown in FIG.
The arithmetic control circuit 270 is made to judge by the following preliminary measurement whether the lens frame to be measured is a lens frame for crab eye glasses or a normal lens frame.

That is, the arithmetic control circuit 270 sets the measuring element (feeler, contact) 216 as the measurement starting position Rm1 near the center of the lower rim when the measuring element (feeler, contact) 216 is viewed from the front of the lens frame 272 for crab eye glasses. That is, the arithmetic control circuit 270 drives and controls the drive motor 204 and, when viewed from the front of the lens frame 272 for crab-eye glasses, the center (measurement start position) of the lower rim 272a of the lens 272 for crab-eye glasses. Rm
In 1), the rotating shaft 201 and the rotating base 202 are positioned at positions where the tracing stylus 216 comes into contact with the lens frame grooves of the lens frame 272 for crab glasses. Then, the arithmetic control circuit 270 obtains the radius vector ρ0 of the lens frame 272 for the crab eye glasses at the measurement start position Rm1 from the measurement signal of the radius vector measuring means 217 at this time, and stores the obtained radius vector ρ0 in the memory 2
71.

Next, the arithmetic and control circuit 270 drives and controls the drive motor 204 to rotate the rotary shaft 201 by approximately 180 ° and the rotary base 202 by approximately 180 ° so that the tracing stylus 216 is measured at the measurement start position Rm1. To the position Rm2 near the center of the upper rim 272b when viewed from the front of the lens frame 272F for crab-eye glasses. Then, when the tracing stylus 216 is moved to the position Rm2 on the opposite side of the vicinity of the measurement start position Rm1, the arithmetic control circuit 270 determines from the measurement signal from the radius vector measuring means 217 that the lens for crab glasses is at the position Rm2. The radius vector ρ180 of the frame 272 is calculated, and the calculated radius vector ρ180 is stored in the memory 271. Next, the arithmetic control circuit 270 causes the radial vector ρ at the measurement start position Rm1.
The sum of 0 and the radial radius ρ180 at the position Rm2 is calculated as the distance D (= ρ0 + ρ180) between the upper rim and the lower rim, D / 2 that is half the distance D is calculated, and D / 2 is a predetermined value ( For example
When it is 12 mm or less, it is determined that the lens frame to be measured is the lens frame 272 for crab glasses. (Main measurement) Here, assuming that the rotation speed of the drive motor 204 when measuring a normal lens frame is N rpm, the drive motor 204 is drive-controlled at this rotation speed to rotate the rotation shaft 201 and the rotation base 202, It is assumed that the tracing stylus 216 is rotated (rotated about the rotation center O) to measure the shape of the lens frame. When the rotation speed of the tracing stylus 216 at this time is a normal rotation speed, when the lens frame to be measured is formed of a soft material for the lens frame 272 for the crab-eye glasses, the lens for the crab-eye glasses is used. A tracing stylus 2 that rotates (moves) the lens frame shape of the frame 272 at a normal rotation speed.
When measured by 16, lens frame 27 for crab glasses
2 is deformed by the moving force of the tracing stylus 216 as indicated by the broken line 273, that is, the lens frame 27 for crab eye glasses.
The shape of the lens frame on the ear-hook side or the nose-pad side of No. 2 is deformed and bent, which makes it impossible to accurately measure the radius vector.

Therefore, when it is determined that the lens frame measured as described above is the lens frame 272 for crab-eye glasses, the arithmetic control circuit 270 causes the rotation speed of the drive motor 204 to be slower than Nrpm NSrpm ( For example, NS
= N / 2 rpm), the moving speed of the tracing stylus 216, that is, the rotational speed of the rotary shaft 201 and the rotary base 202 is slowed down, and a slow rotation sequence for measuring is performed.

Then, the arithmetic control circuit 270 causes the tracing stylus 216 to measure the lens frame shape of the lens frame 272 for crab glasses in accordance with this slow rotation sequence. In this case, since the rotating speed of the tracing stylus 216 becomes sufficiently slower than the normal rotating speed, the tracing stylus 216 does not deform the rim of the lens frame 272 for the crab eye glasses as shown in FIG. 13C. taking measurement.

Further, the measurement location of the lens frame 272 for crab glasses that is measured by changing the rotation speed by the tracing stylus 216 is not limited to the ear hanging side or the nose pad side of the lens frame 272 for crab glasses. Alternatively, it may extend over the entire circumference of the lens frame 272 for crab-eye glasses.

Further, in this apparatus, the rotation measurement can be variably set by the tracing stylus 216 to arbitrarily set the position to be measured. Frame shape measuring device 1 or ball mill 2
A key for setting "measurement location" (ear hook, nose pad, eyebrow, cheek, arbitrary location) is provided on any of the devices to set the measurement location, and the configured location displays the rim shape. It is also possible to display it on the display screen by color display, line thickness display of a target lens shape, line blinking display, or the like.

As a result, the lens frame for crab-eye glasses made of a soft material or the like does not cause any shape deformation or bending of the lens frame on the ear-hook side or the nose-rest side. Since accurate measurement of the lens frame shape is eliminated, accurate lens frame shape measurement can be realized.

Further, not only by changing the rotation speed of the tracing stylus 216 but also by changing the rotation direction, inaccurate measurement of the lens frame shape due to the shape deformation and bending of the lens frame for crab eye glasses can be eliminated. Therefore, accurate lens frame shape measurement can be realized.

For example, in the lens frame 272 of the crab-eye glasses as shown in FIG. 13, the lower rim 272a is greatly curved to the upper rim 272b at the left and right nose pad side and the ear hook side, and the upper rim is formed. The curvature at the left and right portions of 272b is small. In such a case, when the tracing stylus 216 is brought into contact with the lens frame 272 and moved in the direction of the solid line arrow, when the tracing stylus 216 moves from the lower rim 272a portion to the upper rim 272b portion, Upper rim 272
When a rapid deformation force is applied to the portion on the ear-hook side of b, the upper rim 272b is deformed as shown by the broken line. In this regard, since the bridge B is provided on the nose-contact side (left side) of the upper rim 272b, the probe 216 is brought into contact with the lens frame 272 and moved in the direction of the broken line arrow,
The tracing stylus 216 moves from the lower rim 272a to the upper rim 2
Even when a sudden deformation force acts on the nose pad side portion of the upper rim 272b when it is moved to the portion 72b, the upper rim 2
The bridge B prevents the deformation of 72b on the ear hook side (right side portion) as shown by the broken line.

Therefore, it is advisable to perform the following measurement control by the arithmetic control circuit 270 which is the measurement control means.

That is, the arithmetic control circuit 270 is shown in FIG.
In the case of the lens frame 272 as shown in FIG.
While judging that is a lens frame for crab glasses,
It is determined that the curvature of the left and right portions of the lower rim 272a of the lens frame 272 is large and the curvature of the left and right portions of the upper rim 272b is small. In this case, the arithmetic control circuit 27
0 controls the movement of the contact 216 in the direction indicated by the arrow indicated by the dotted line in FIG. That is, the arithmetic control circuit 270 determines that the contactor 216 is rotated from the lower rim 272a to the upper rim 2 on the nose pad side (bridge B side).
It is controlled so as to make contact movement toward 72b. As a result, the upper rim 272a contacts the contact 216 on the ear-hook side.
The contact measurement state is set so that it is not subjected to a sudden deformation force. In this way, by rotating the tracing stylus 216 in the direction of the arrow shown by the dotted line in FIG. 13B, it is possible to reduce the shape deformation of the lens frame on the ear-hook side.

By controlling the rotation of the tracing stylus 216 together with the slow rotation sequence, inaccurate measurement of the lens frame shape due to further shape deformation and bending of the lens frame is eliminated, and the accurate lens frame shape is eliminated. The measurement can be realized. The same applies when the moving speed of the tracing stylus 216 is high. (4) Measurement Example 4 The lens frames LF and RF of the spectacle frame (spectacle frame) MF are
Some rim widths are narrow in the direction perpendicular to the optical axis of the framed spectacle lens. Such spectacle frame (spectacle frame)
In the MF, when the shape of the lens frames LF and RF is measured by bringing a probe (feeler) 216 into contact with the bevel groove (lens frame groove) 51 on the inner peripheral surface side of the lens frames LF and RF at a predetermined measurement pressure, In some cases, the lens frames LF and RF are easily bent and deformed in a direction perpendicular to the optical axis of the spectacle lens by an external force due to the measurement pressure (external force) of the tracing stylus 216 pressed against the bevel groove (lens frame groove) 51.

Further, in the spectacle frame (spectacle frame) MF,
For example, in some cases, such as a titanium frame, which is made of a soft material, the lens frames LF and RF are easily bent and deformed in the direction perpendicular to the optical axis of the spectacle lens by the measurement pressure. In such a spectacle frame (spectacle frame) MF, the rim surface is usually not polished (plated or the like). In such a spectacle frame MF, the bevel groove (lens frame groove) 51 when the tracing stylus 216 is moved by contacting the bevel groove (lens frame groove) 51 of the left and right lens frames LF and RF of the spectacle frame MF. It is considered that the friction resistance of is higher than that of a spectacle frame (spectacle frame) formed of another material.

When measuring the lens shapes of the lens frames LF and RF of such a spectacle frame (spectacle frame) MF, the measuring element 2 is used.
It is desirable that the frictional resistance of the 16 in contact with the bevel groove (lens frame groove) 51 be minimized. Hereinafter, the tracing stylus 216 by the arithmetic control circuit 270 for this purpose
A configuration for obtaining the rotation center of will be described.

A multiple ring-shaped (concentric) alignment mark (target) 500 as shown in FIG. 16 is provided on the upper surface of the slider 212. When the slider 212 is covered with the cover, the positioning mark 500 is provided on the upper surface of the cover. This alignment mark 500 is
At the initial position where the slider 212 contacts the stopper 208a of the support plate 208, the slider 212 is set to be located at the center of the apparatus body 10. (i) Preliminary measurement when the set positions of the left and right lens frames LF and RF are not displaced And the spectacle frame (spectacle frame) between the movable frames 37 and 37
When the MF is held (set), the alignment mark 5 is arranged so that the approximate center between the left and right lens frames LF and RF of the spectacle frame (spectacle frame) MF is located at the approximate center of the apparatus body 10.
00 to adjust the positions of the left and right lens frames LF and RF. That is, by operating the entire spectacle frame (spectacle frame) MF left and right, so that the left and right lens frames LF and RF are evenly associated with any of the multiple rings R1, R2, R3, etc. of the alignment mark 500, The positions of the left and right lens frames LF and RF are adjusted.

At this position, normally, the left and right lens frames L
Lens shape (lens shape) of lens frame LF in F and RF
Therefore, the tracing stylus 216 faces the inside of the lens frame LF. When the start switch 13 is turned on from this state, the arithmetic and control circuit 270 executes preliminary measurement of the lens shape of the lens frame LF.

That is, the arithmetic and control circuit 270 determines that the motor 20
4,253,401 etc. are operated and controlled, and the measuring element (contact element) 216 is moved to the lens frame L of the spectacle frame (spectacle frame) MF.
After contacting the bevel groove (lens frame groove) 51 of F, the base rotation motor 204 is drive-controlled to rotate the rotating shaft 201 once, so that the tracing stylus 216 makes one round along the lens frame LF ( Rotation) and the above B. The lens shape (lens shape) of the lens frame LF is preliminarily measured in the same manner as the lens shape measurement in FIG.

At this time, the arithmetic control circuit 270 obtains the radius vector ρi of the valley portion of the bevel groove of the lens frame LF based on the output from the measuring means 217, and this radius vector ρi is used as the base rotary motor 20.
The radius vector information (θi, ρi) is associated with the rotation angle θi of 4, and the radius vector information (θi, ρi) is stored in a memory (not shown).

Then, the arithmetic and control circuit 270 contacts the lens frame LF with the BO which is in contact with the obtained radius vector information (θi, ρi).
The position of the center of the X (square frame) 200 (the geometric center of the lens frame LF) is obtained. Ρi in the radius vector information (θi, ρi) is the rotation center of the rotation base 202, that is, the rotation shaft 20.
It is the distance from the center of rotation of 1 to the tip of the probe 216. However, the rotation center OL of the rotation base 202 and the geometric center GL do not coincide with each other as shown in FIG.

Next, the arithmetic control circuit 270 controls the operation of the measuring section moving motor 107 to move the slider 105 leftward in FIG. 7 in order to measure the lens frame shape of the right lens frame RF. , The tracing stylus 216 is moved from the lens frame LF to the lens frame RF side. This moving distance LB can be obtained by the number of drive pulses for driving the measuring unit moving motor 107, and becomes the moving amount of the rotating shaft 201. The movement amount LB is set in advance by setting a distance LB / 2 from the center O of the apparatus body 10 to the center of the rotation shaft 201 when the lens frame LF is measured.
The distance from the center of the rotary shaft 201 at the time of measuring F to the center of the rotary shaft 201 at the time of measuring the lens frame RF from the center O center of the apparatus main body 10 is made equal.

After that, the arithmetic control circuit 270 further controls the operation of the motors 204, 253, 401 and the like so that the measuring element (contact) 216 is moved to the bevel groove (lens) of the lens frame RF of the spectacle frame (spectacle frame) MF. After making contact with the frame groove 51, the base rotation motor 204 is drive-controlled to rotate the rotary shaft 20.
By rotating the stylus 216 once around the lens frame RF, the stylus 216 is rotated once around the lens frame RF. The lens shape (lens shape) of the lens frame RF is preliminarily measured in the same manner as the lens shape measurement in FIG.
At this time, the arithmetic control circuit 270 obtains the radius vector ρi of the valley portion of the bevel groove of the lens frame RF based on the output from the measuring means 217, and associates this radius vector ρi with the rotation angle θi of the base rotation motor 204. Then, the radius vector information (θi, ρi) is stored, and the radius vector information (θi, ρi) is stored in a memory (not shown).

Then, in the same manner as described above, the arithmetic control circuit 270 determines the center (geometry of the lens frame RF) of the BOX (rectangular frame) 200 which is in contact with the lens frame RF from the radius vector information (θi, ρi) of the lens frame RF. Find the center position. Ρi in the radius vector information (θi, ρi) is the distance from the rotation center of the rotation base 202, that is, the rotation center of the rotation shaft 201 to the tip of the probe 216. However, this rotating base 202
The rotation center OR and the geometric center GR do not match as shown in FIG. 14 and are displaced by the displacement amount ΔA.

Then, the arithmetic control circuit 270 determines the distance between the BOX centers of the lens frame LF and the lens frame RF (the distance between the geometric centers) from the deviation amounts ΔA, −ΔA and the moving distance LB of the rotary shaft 201 obtained as described above. Distance, FPD) is calculated. That is, the geometric center distance FPD is calculated as FPD = | −ΔA | + LB + ΔA. After that, the arithmetic control circuit 270 calculates 1/2 of the obtained FPD to obtain the position of the center line Bc passing through the center of the bridge B. When the set positions of the left and right lens frames LF and RF are not displaced as in (i) described above, the center line Bc passing through the center of the bridge B is at a position passing through the center of the apparatus body 10.

As described above, when the holding positions (set positions) of the left and right lens frames LF and RF are not displaced to the left and right with respect to the center of the apparatus main body 10, the lens frame LF is moved from the rotation center (measurement center) OL. The absolute value of the shift amount −ΔA between the geometric centers GL and the shift amount ΔA between the rotation center (measurement center) OR and the geometric center GR of the lens frame RF become equal. (ii) Preliminary measurement when the set positions of the left and right lens frames LF and RF are deviated (allowable shift amount of the set positions of the left and right lens frames LF and RF) The eyeglass frame (eyeglass frame) MF is placed between the movable frames 37 and 37. 14B and the holding claws 43 and 44, the set positions of the left and right lens frames LF and RF are set on the apparatus main body 10 as shown in FIG. It is usual to slightly shift (bias) n in the left-right direction with respect to the center.

In this state, in the same manner as in (i) above, the lens shapes of the lens frames LF and RF of the spectacle frame (spectacle frame) MF and the geometric center position of the lens frames LF and RF and the geometric center are When the distance is calculated, as shown in FIG. 14B, the geometric center GL of the lens frame LF and the tracing stylus 216 are measured.
The distance (interval) between the rotation center OL and the geometric center GR of the lens frame RF and the rotation center OR of the tracing stylus 216 are larger than the distance (interval) from the rotation center OL.

When such a deviation amount n occurs as shown in FIG. 14B, the maximum allowable deviation amount that does not hinder the measurement is Y, and the deviation amount when it is set in a biased manner is X. Then, the shift amount X is X = | −n + A (−n−A) | = 2n. Therefore, when Y <X, the set accuracy of the spectacle frame (spectacle frame) affects the measurement accuracy. In this case, the arithmetic control circuit 270 blinks the light emitting diode LED3 or the like to clearly indicate (notify, notify) that the measurement accuracy is affected by the set deviation of the spectacle frame (spectacle frame). You can
It should be noted that Y is used which is obtained in advance from experimental values or the like. (iii) Movement of rotation centers OL and OR for main measurement As described above, the eyeglass frame (eyeglass frame) MF is moved to the movable frame 3
When setting between 7, 37, left and right lens frame LF, RF
It is usual that the set position of is shifted (biased) by n in the left-right direction with respect to the center of the apparatus body 10.

Here, the rotation centers OL and O for the main measurement
In explaining the movement of R, when the tracing stylus (contact) 216 is arranged in the left and right lens frames LF or RF, the tracing stylus 2
The 16 rotation center (moving rotation center) is O in the lens frame LF.
L, and the center of rotation (movement center of rotation) of the tracing stylus 216 is OR in the lens frame RF. In addition, the probe (contact) 2
When 16 is disposed in the lens frame LF, the actual deviation amount between the rotation center OL of the tracing stylus 216 and the geometric center GL of the lens frame LF is set to ΔL, and the tracing stylus (contact) 216 is set to the lens frame RF. When arranged, the center of rotation OR of the probe 216
And the actual deviation amount between the geometrical center GR of the lens frame RF and Δ
Let R. (A). As described above, the spectacle frame (spectacle frame) MF
When measuring the lens shapes of the lens frames LF and RF, it is desirable to minimize the frictional resistance with which the tracing stylus 216 makes contact movement with the bevel groove (lens frame groove) 51.
In addition, as described above, the spectacle frame (spectacle frame) MF is shown in FIG.
4B, the shift amount ΔL becomes | -n-A | in FIG. 14B, and the shift amount ΔR is shown in FIG.
4 (b) becomes | -n + A |, and the deviation amounts ΔL and ΔR greatly differ. In this case, the measurement conditions are different between the left and right lens frames RF and LF, which is not preferable.

Therefore, in the actual measurement, the tracing stylus 216 is moved along the lens frame LR or RF in a bevel groove (lens frame groove).
It is advisable that the center of movement of the tracing stylus 216 be located at the geometrical centers GL and GR of the lens frame LR or RF when making contact movements within 51. However, in reality, the movement rotation centers Ol and OR of the tracing stylus 216 are set to the lens frame LR or R.
It is difficult to match the geometrical centers GL and GR of F. Therefore, the control by the arithmetic control circuit 270 may be performed as follows.

That is, the arithmetic and control circuit 270 uses the probe 21
The motor 107 for moving the measuring unit is drive-controlled to move the rotation center 6 (rotation center of the rotation shaft 201) OL to the geometric center GL of the lens frame LF, and the slide base 105 is moved.
Is controlled by the feed screw 106. At this time, the measuring section moving motor 107 is set so that the deviation amount between the rotation center OL and the obtained geometric center GL falls within an allowable range in which no measurement error occurs. That is,
Center of rotation (rotation origin) OL during preliminary measurement of lens frame LF
Therefore, the measuring unit moving motor 107 is controlled so that the deviation amount n between the geometrical centers GL falls within the range of Y / 2.

Further, the arithmetic control circuit 270 uses the lens frame R
When the main measurement of the lens shape of F is performed, the rotation center (rotation center of the rotation shaft 201) OR of the tracing stylus 216 is the lens frame R.
The measuring unit moving motor 107 is drive-controlled so as to move to the geometrical center GR of F, and the slide base 105 is driven forward / backward by the feed screw 106. At this time, the measuring unit moving motor 107 is set so that the amount of deviation between the rotation center OR and the obtained geometric center GR falls within an allowable range in which no measurement error occurs. That is, the measuring unit moving motor 107 is controlled so that the deviation amount n between the rotation center (rotation origin) OR during the preliminary measurement of the lens frame RF and the geometric center GR falls within the range of Y / 2.

In the control by the arithmetic control circuit 270 as described above, the deviation amounts ΔL and ΔR are as shown in FIG.
It is advisable to control the measuring section moving motor 107 by the arithmetic control circuit 270 so that | and | A | are substantially equal. Thereby, the movement rotation centers OL and OR of the tracing stylus (contact) 216 are set to the geometric centers GL of the lens frames LF and RF,
The lens shapes of the lens frames LF and RF can be accurately measured without error even if they do not exactly match GR. (B) Further, as shown in FIG. 14B, the set positions of the left and right lens frames LF and RF are displaced (biased) by n from the center of the apparatus main body 10 in the left-right direction.
When the preliminary measurement is performed in the same manner as (i), the deviation amount X = 2n
When the arithmetic control circuit 270 detects that>becomes> Y,
The arithmetic control circuit 270 causes the light emitting diode LED3 and the like to blink, and when the spectacle frame (spectacle frame) is misaligned,
State (notify) that the measurement accuracy will be affected.

In this case, since the measurement is affected, the spectacle frame (spectacle frame) MF is reset between the frame guides 48, 48 of the movable frames 37, 37. At this time, the positioning marks 500 are used to position the left and right so that the approximate center (the position of the center line Bc) between the left and right lens frames LF and RF of the eyeglass frame (eyeglass frame) MF is located at the approximate center of the apparatus body 10. The positions of the lens frames LF and RF of are adjusted. That is, by operating the entire spectacle frame (spectacle frame) MF left and right, so that the left and right lens frames LF and RF are evenly associated with any of the multiple rings R1, R2, R3, etc. of the alignment mark 500,
The positions of the left and right lens frames LF and RF are adjusted.

As described above, when the spectacle frame (spectacle frame) MF is set in the lens frame shape measuring apparatus 1, the set position of the spectacle frame, that is, the left and right centers of the spectacle frame (the middle line B
c) is approximately the center of the lens frame shape measuring device 1 (device body 10
It can be easily disposed at the center) to measure the shape of the left and right lens frames LF and RF of the spectacle frame.
The shift amounts ΔL and ΔR between the moving rotation centers OL and OR of 6 and the geometric centers GL and GR of the lens frames LF and RF can be made substantially equal in the left and right lens frames LF and RF. (iv) Main measurement Prior to this main measurement, as described above, the deviation amount between the moving rotation centers OL and OR of the tracing stylus 216 and the geometric centers GL and GR is set within an allowable range so that a measurement error does not occur. And above
(i) In the same manner as “Preliminary measurement when the set positions of the left and right lens frames LF and RF are not displaced”, the lens frame LF
The main measurement of the lens shape of (RF) is performed.

That is, the measuring element 216 is attached to the lens frame LF (R
In the state of being in contact with the lens frame groove 51 of F), the base rotation motor 204 is driven and controlled by the arithmetic control circuit 270, and the rotary shaft 201 is rotated once.
16 while making contact with the lens frame groove 51 along the lens frame LF (RF) to make one revolution (one rotation),
The radius vector information (θi, ρi) of F is measured.

By thus measuring the radius vector information (θi, ρi) of the lens frames LF and RF by the tracing stylus 216, the contact angle of the tracing stylus (feeler) 216 with the lens frame groove 51 becomes small. The frictional force from the lens frame groove 51 is reduced, the tracing stylus (feeler) 216 can smoothly move (rotate) along the lens frame groove 51, and the lens frame shape of the eyeglass frame can be accurately measured. You can D. Change of measurement force (measurement pressure) (i) Change example 1 of measurement force In the measurement examples of (1) to (3) of the above-described embodiment, the arithmetic control circuit 270 has a lens frame to be measured as a lens for crab glasses. When it is determined that the frame is not the frame, the drive motor 401 is operated and controlled, and the first slider 400 is moved to the support plate 208 side by the gear 403 and the rack tooth 402 that rotate integrally with the output shaft 401a of the drive motor 401. Along with this movement, the lower slider 400 moves the micro switch 405.
When ON is turned on, this ON signal is input to the arithmetic control circuit 270, and the arithmetic control circuit 270 stops the drive motor 401 with the slider 401 positioned on the support plate 208 side. In this state, the spring 228 is positioned at the right end position where the pulling force becomes large.

Therefore, in this case, the pressing force (measuring force = side constant pressure) by which the tracing stylus 216 presses the lens frame becomes strong, and the rotational speed (moving speed) of the tracing stylus 216 is increased.
Is faster than when measuring a normal lens frame.

When the arithmetic control circuit 270 determines that the lens frame to be measured is the lens frame for crab glasses, in the measurement examples (1) to (3) of the above-described embodiment, the drive motor 401 is used. Is reversely rotated (operation control) contrary to the above, and the first slider 400 is moved to the side opposite to the support plate 208 by the gear 403 and the rack teeth 402 that rotate integrally with the output shaft 401a of the drive motor 401. . With this movement, when the lower slider 400 turns on the micro switch 404, this ON signal is input to the arithmetic control circuit 270, and the arithmetic control circuit 270 stops the drive motor 401. In this state, the lower slider 40
Since 0 moves to the side of the support plate 207 for a predetermined distance, the force for pulling the spring 228 is weaker than that when the lower slider 400 is located closest to the support plate 208.

Therefore, in the case of the lens frame for crab-eye glasses, the probe 216 weakens the pressing force (measuring force = side constant pressure) for pressing the lens frame 272 for crab-eye glasses, and As in the measurement examples of (1) to (3), the rotation speed (moving speed) of the tracing stylus 216 is made slower than in the case of measuring a normal lens frame, or the lens frame 272 for crab glasses is used. The rotation speed (moving speed) of the tracing stylus 216 is made slower within a predetermined angle range on the nose side and the ear side of the claw eye due to the pressing force of the tracing stylus 216. Lens frame 2 for glasses
It is possible to further reduce the flexural deformation of 72 on the nose side and the ear side to improve the measurement accuracy. (Ii) In addition, D. In the measurement example of (i), when measuring the lens frame 272 for crab-eye glasses, the rotational speed (moving speed) of the tracing stylus 216 is slower than that during measurement of a normal lens frame, and the tracing stylus at the time of measurement is measured. The pressing force of the lens frame 272 for crab-eye glasses by 216 is set to be smaller than the normal measuring force, but the present invention is not limited to this.

That is, in the case of measuring the lens frame 272 for crab-eye glasses, the rotation speed (moving speed) of the tracing stylus 216 is not controlled to be slower than the measurement of the normal lens frame, and the tracing stylus at the time of measurement is measured. Only the pressing force (measurement force = measurement pressure) of the lens frame 272 for crab glasses by 216 may be made smaller than the normal measurement force. (iii) In addition, A. If the rim width of the lens frame measured in D. is smaller than the predetermined value and the lens frame is easily deformed, D.
As in (i), the measuring force of the tracing stylus 216 is made smaller, and the bending deformation on the nose side and the ear side of the lens frame due to the pressing force of the tracing stylus 216 is further made small so that the measurement accuracy is improved. good. Although this control is performed by the arithmetic control circuit 270, it may be performed not only in the lens frame 272 for crab eye glasses but also in the measurement of a normal lens frame.

Furthermore, A. If the rim width of the lens frame measured in step 2 is smaller than the specified value and the lens frame is easily deformed,
When measuring a normal lens frame, the rotational speed (moving speed) of the tracing stylus 216 may be reduced as in the case of measuring the lens frame 272 for crab glasses. In this case, the measuring force of the tracing stylus 216 may be set small. E. In addition, a distance measuring means for measuring the distance between the movable frames 37, 37 is provided, and the distance between the upper rim and the lower rim of the lens frame held between the movable frames 37, 37 is obtained from the distance measuring means, The value of half of the obtained interval is a predetermined value (for example, 12
mm) or less. In this case, since the main measurement can be started immediately without performing the preliminary measurement, the measurement time can be shortened. As this interval measuring means, a linear encoder, a rotary encoder, a magnet scale, a potentiometer, or other measuring means can be adopted. <Measurement of shape of target plate, demo lens, etc.>
When measuring the shape of the target lens such as the template or the demo lens using the target lens holder 111 as shown in (a), the motor 107 for moving the measuring unit is operated to move the slide base 105 to the left in FIG. Move to. As a result, the tip of the erection drive piece 219a has the rim feeler erection plate portion 11 of the rim holder 111.
Upon hitting 1b, the lens-shaped probe 219 is rotated clockwise about the rotation shaft 220 against the spring force of the spring 221. Along with this, the micro switch 222 is turned off.

With this rotation, the spring 22
When 1 moves upward beyond the rotary shaft 220, the lens-shaped probe 219 is erected by the spring force of the spring 221, and the lens-shaped probe 219 is acted by a stopper and a spring 221 not shown. Figure 7 in the standing position
It is retained as in (b). In this standing position, the micro switch 223 is the switch operation piece 2 of the measuring element 219 for the target lens shape.
It is turned on by 19b and this signal is input to an arithmetic control circuit (not shown).

Upon receipt of the ON signal from the micro switch 223, the arithmetic control circuit operates the drive motor 253 to rotate the gear 258 in the counterclockwise direction,
By moving the lower slider 252 to the left, the pressing portion 263a of the pressing shaft 263 is separated from the upper slider 252 as shown in FIG. 8 (a). Along with this operation, the upper slider 212 is moved to the left by the spring force of the spring 228, and the measuring surface of the lens-shaped probe 219 is shown in FIG.
As shown in (a), it is brought into contact with the peripheral edge of the target lens 112.

In this state, by rotating the base rotation motor 204, the lens-shaped probe 219 is moved to the lens 112.
Move along the periphery of. Then, the upper slider 21
The movement of 2 is detected by the radius vector measuring means 217, and the output of the radius vector measuring means 217 is input to an arithmetic control circuit (not shown).

This arithmetic control circuit obtains the radius vector ρi of the target lens 112 based on the output from the measuring means 217, and this radius vector ρi.
Is set as the radius vector information (θi, ρi) corresponding to the rotation angle θi of the base rotary motor 204, and the target lens shape information, that is, the radius vector information (θi, ρi) is stored in a memory (not shown). (iii) Lens thickness measurement of the lens to be processed based on the target lens shape information, and when the data request switch 81 of the lens holder is turned on, the template plate obtained by the frame shape measuring device 1 as described above, The target lens shape information of the target lens such as the demo lens, that is, the radius vector information (θi, ρi) or the target lens shape information (θi, ρi, Zi) of the lens frame (target shape) is the lens frame of the lens scraper 2. It is transferred to and stored in the shape memory (target lens shape memory) 90.

On the other hand, the lens L to be processed is held between the lens rotation shafts 304, 304, and the lens thickness measuring switch 85 is turned on. As a result, the arithmetic / determination circuit 91
The drive unit (not shown) widens the gap between the feelers 332 and 334 and activates 336 to operate the feeler 3
After exposing the lenses 32 and 334 to the front refraction surface and the rear refraction surface of the lens L to be processed, a feeler 33 by a driving means (not shown)
Release the expansion force of 2, 334, and feeler 332, 334
Is brought into contact with the front and rear refracting surfaces of the lens L to be processed.
Thereafter, the calculation / determination circuit 91 determines that the target lens shape information (θi,
ρi, Zi) or the radius vector information (θi, ρi), the pulse motor 337 is operated to move the lens rotation shafts 304, 30.
4 is rotated to rotate the lens L to be processed, and the pulse motor 336 is operated and controlled. At this time, the calculation / determination circuit 91 obtains the lens thickness Δi in the target lens shape information (θi, ρi, Zi) or the radius vector information (θi, ρi) which is the target lens shape information based on the output from the encoder 335. The processed data memory 95 is stored. (Modified Example of Measuring Means) Further, in FIG.
334 are provided separately so that the feelers 332, 3
Although the lens thickness can be measured by sandwiching the lens L to be inspected between 34, it is not necessarily limited to this configuration.

For example, as shown in FIG. 17, the two feelers 332 and 334 are integrally coupled and supported by the support member 333A, so that the two feelers 332 and 334 can move integrally in the direction along the optical axis OL. In addition to the above, the movement amount of the feelers 332 and 334 may be detected by one encoder 333. In this case, the distance fx between the two feelers 332 and 334 is equal to
Set a sufficiently large interval (predetermined interval) larger than the expected thickness of.

The support member 333A is the stage 331.
It is held so that it can move back and forth only in the left-right direction. Moreover, springs S1 and S2 disposed on the left and right of the support member 333A are interposed between the support member 333A and the stage 331. The springs S1 and S2 are configured to hold the support member 333A at approximately the center of the horizontal movement range when the feelers 332 and 334 are not in contact with the lens L to be measured. Incidentally, the stage 331
Is attached to a main body that holds a carriage (not shown) so as to be movable back and forth with respect to the lens rotation shafts 304, 304. A pulse motor 336 attached to this main body drives the lens rotation shafts 304, 304 forward and backward. It is supposed to be done. Further, the carriage and the lens rotation shaft 30
4, 304 are in the left-right direction (lens rotation shafts 304, 304).
It is configured to be driven back and forth by a pulse motor PM in the axial direction).

Then, in FIG. 17, the arithmetic / judgment circuit 91 drives and controls the pulse motor PM to move the lens L to be processed left and right when measuring the edge thickness, and the lens L to be inspected moves between the feelers 332 and 334. The pulse motor PM is stopped when it comes to. Next, the calculation / determination circuit 91
Controls the operation of the pulse motor 336 to control the stage 331.
Is moved to the lens rotation shafts 304, 304 side to position the lens L to be processed between the feelers 332, 334. At this time, the tips of the feelers 332 and 334 are moved to the radial vector information (θi,
The lens rotation shafts 304, 304 are rotated by the pulse motor 337 so as to be positioned at the initial position of ρi), that is, the rotation angle θ0 of the radius vector information (θ0, ρ0). Further, by controlling the operation of the pulse motor 336 at the rotation angle θ 0, the stage 331 and the feelers 332 and 334 are moved to the position where the tip ends of the feelers 332 and 334 correspond to the radius vector ρ 0 of the lens L to be processed. Move to 304 side.

In this state, the pulse motor PM1 for moving the carriage (not shown) to the left and right is operated and controlled, and the carriage and the lens rotation shafts 304, 304 and the lens L to be processed.
By moving the right and left, the feeler 332 can be brought into contact with the front refracting surface fa of the lens L to be processed, or the feeler 334 can be brought into contact with the rear refracting surface fb. This control is performed by the arithmetic / determination circuit 91.

Therefore, the arithmetic / judgment circuit 91 first contacts one of the feelers 332 with the front refracting surface fa of the lens L to be tested in this manner.

Then, the arithmetic / determination circuit 91 determines that the rotating shaft 3
04, 304 are rotated so that the coordinates or position of the front refracting surface fa of the lens L to be measured in the optical axis OL direction in the radius vector information (θi, ρi) is adjusted by the output signal (measurement signal) of the encoder 333 and the pulse motor PM1. Calculate from drive amount. That is, the calculation / judgment circuit 91 is configured so that
When starting to measure the edge thickness by rotating the
The pulse motor 336 is driven and controlled based on the radius vector ρi for each rotation angle θi of 4,304 to integrally move the stage 331 and the feeler 332 forward and backward with respect to the optical axis OL.
By adjusting the distance from the optical axis OL to the contact position of the feeler 332 with the lens L to be measured to the radius vector ρi, the radius vector information (θi,
optical axis OL of the front refraction surface fa of the lens L to be measured at ρi)
From the output signal (measurement signal) of the encoder 333 and the drive amount of the pulse motor PM1, the coordinates or position in the direction f
Calculate as ai.

Next, the calculation / judgment circuit 91 brings the other feeler 334 into contact with the rear refracting surface fb of the lens L to be measured as described above. Then, the calculation / determination circuit 91
By rotating the rotary shafts 304, 304, the radius vector information (θi,
optical axis OL of the rear refracting surface fb of the lens L under test at ρi)
The coordinate or position in the direction is obtained from the output signal (measurement signal) of the encoder 333 and the drive amount of the pulse motor PM1. That is, the calculation / judgment circuit 91 determines that the rotating shaft 30
When the edge thickness measurement is started by rotating 4, 304, the pulse motor 336 is drive-controlled based on the radius vector ρi for each rotation angle θi of the rotation shafts 304, 304, and the stage 331 and the feeler 332 are moved to the optical axis. The lens is driven to move back and forth integrally with the OL, and the distance from the optical axis OL to the contact position of the feeler 332 with the lens L to be measured is adjusted to the radius vector ρi, and the test target at the radius vector information (θi, ρi) is detected. Rear refractive surface fb of lens L
Of the coordinate or position of the optical axis OL in the direction of the encoder 33
3 is obtained from the output signal (measurement signal) of No. 3 and the drive amount of the pulse motor PM1 as fbi.

After that, the calculation / determination circuit 91 determines the distance between the front refraction surface fa and the rear refraction surface fb of the lens L to be measured in the radius vector information (θi, ρi) as the edge thickness Wi, and Wi = | f.
It is calculated as ai-fbi |. According to this configuration, since the edge thickness can be measured by only one encoder 333, the stage 331 can be downsized, the stage 331 can be easily incorporated in the device, and only one expensive encoder can be omitted. The overall cost can be reduced.

[0139]

Second Embodiment In the embodiment described above, the measuring force of the tracing stylus 216 is set to be electrically controlled using the drive motor 401 and the microswitches 404 and 405, but the present invention is not limited to this. is not.

For example, as shown in FIG.
The measuring force by 16 may be manually switched.
In FIG. 18, the lower end of a crank-shaped measuring pressure switching lever (measuring force adjusting lever) 500, which is a manual measuring force changing unit (manual measuring force adjusting unit), is located on the support plate 208 side and is attached to the rotary base 202. It is rotatably held by a support shaft 501. As a result, the measurement pressure switching lever 5
The upper end side of 00 is provided so as to rotate forward and backward with respect to the support plates 207 and 208. This measurement pressure switching lever 5
A spring locking pin 500a is provided at an intermediate portion of 00, and a spring 228 is locked to the spring locking pin 500a. As a result, the measurement pressure switching lever 500 is always urged to rotate leftward in FIG.

An L-shaped lever locking plate 502 is fixed to the upper end of the support plate 208. This plate 502 has a plate portion 502a extending horizontally on the support plate 207 side, and a lever insertion hole 503 is formed in this plate portion 502a as shown in FIG. The switching lever 500 is inserted through the upper part. Then, the two lever engaging portions 50 are arranged in the lever insertion hole 503 at intervals in the direction away from the support plate 208.
3a and 523b are formed.

Further, micro switches 504 and 505 for detecting that the measurement pressure switching lever 500 is locked to the lever locking portions 503a and 503b are provided, and the lever detection signals from the micro switches 504 and 505 are operated and controlled. Input to 270.

In addition, a liquid crystal display (not shown) or a speaker (not shown) is provided in the measuring device main body 10,
A. The rim width of the lens frame measured in is smaller than the predetermined value,
If the lens frame is easily deformed, the arithmetic control circuit 270
Informs the measurement operator of this fact through a liquid crystal display or speaker (not shown), and prompts the operator to change the measurement force.

Next, the operation of such a configuration will be described.

In such a structure, when the measuring pressure switching lever 500 is locked to the lever locking portion 503a, the force of pulling the spring 228 is large, and the tracing stylus 2
The measuring force by 16 becomes large. Further, when the measurement pressure switching lever 500 is locked to the lever locking portion 503b, the force for pulling the spring 228 is small, and the probe 2
The measuring force by 16 becomes small.

Moreover, the arithmetic control circuit 270 is operated by the A. In the case where the rim width of the lens frame measured in is larger than a predetermined value and the lens frame is difficult to be deformed by a large measuring force, the measurement operator is notified by a liquid crystal display or a speaker not shown, Have the operator instruct that the measuring force should be changed significantly.

Then, in accordance with this instruction, the operator locks the measurement pressure switching lever 500 on the lever locking portion 503a, orients the measurement pressure switching lever 500 in the vertical direction as shown in FIG. It is preferable to increase the measuring force of the child 216. In this case, the arithmetic control circuit 207
When there is no detection signal from the micro switch 505, the operator again instructs the measurement force to be changed. Then, the arithmetic control circuit 270, after receiving the detection signal from the micro switch 505, starts the start button 1
When 3 is turned on, measurement is started.

Further, the arithmetic control circuit 270 is provided with the A. In the case of a lens frame whose rim width of the lens frame measured by is smaller than a predetermined value and the lens frame may be deformed by a large measuring force, the measurement operator is notified by a liquid crystal display or a speaker not shown, Have the operator instruct that the measuring force should be changed significantly. Then, according to this instruction, the operator locks the measurement pressure switching lever 500 on the lever locking portion 503b and tilts the measurement pressure switching lever 500 in the direction away from the support plate 208 as shown in FIG. Measurement point 2
It is better to reduce the measuring force by 16. In this case, when there is no detection signal from the micro switch 504, the arithmetic and control circuit 207 again instructs the operator to change the measuring force. Then, the arithmetic control circuit 27
0 starts measurement when the start button 13 is turned on after the detection signal from the micro switch 504.

Further, the arithmetic control circuit 270 is a C.I. If it is determined that the distance between the upper and lower rims of the lens frame measured as shown in Fig. 3 is smaller than a predetermined value and the lens frame 272 is for crab eye glasses, the fact is measured by a liquid crystal display or speaker (not shown). The operator may be notified and the operator may be instructed that the measuring force should be greatly changed. Then, the operator follows the instruction and measures pressure switching lever 5
00 to the lever locking portion 503b, and the measurement pressure switching lever 500 is inclined in a direction away from the support plate 208 as shown in FIG. In this case, when there is no detection signal from the micro switch 504, the arithmetic and control circuit 207 again instructs the operator to change the measuring force. Then, the arithmetic control circuit 270 starts the measurement when the start button 13 is turned on after the detection signal from the micro switch 504 is received.

[0150]

As described above, according to the invention of claim 1, the lens frame holding means for holding the lens frames for the left and right eyes of the spectacle frame and the lens frames for the left and right eyes held by the holding means are provided. In a lens frame shape measuring device having a contacting element that abuts and measuring the shape of the lens frame by the contacting element, when the center of rotation of the contacting element is arranged in each of the left and right eye lens frames. Since the configuration is provided with control means for controlling the distance between the center of rotation of the contact and the geometric center of the lens frame to be substantially equal in the lens frames of the left and right eyes, the center of rotation of movement of the contact It is possible to measure the lens shape of the lens frame accurately without causing an error even if is accurately aligned with the geometric center of the lens frame.

Further, the invention of claim 2 includes a lens frame holding means for holding the lens frames for the left and right eyes of the spectacle frame, and a contactor for contacting the lens frames for the left and right eyes held by the holding means. In the lens frame shape measuring device that has the contact element and measures the shape of the lens frame, the lens frame holding means includes a rotation center of the contact element and a lens when the lens frame holding means is arranged in each of the lens frames of the left and right eyes. When the distance displaced from the geometric center of the frame is different, the lens frames for the left and right eyes are held based on the concentric index provided on the rotation center of the rotation base. flame)
When setting to the lens frame shape measuring device, the setting position of the spectacle frame, that is, the left and right centers of the spectacle frame are easily disposed at substantially the center of the lens frame shape measuring device, and the shape of the left and right lens frames of the spectacle frame is set. At the time of measurement, the amount of deviation between the center of movement of the contactor and the geometrical center of the lens frame can be made substantially equal for the left and right lens frames.

Further, in the invention of claim 3, the lens frame holding means for holding the lens frames for the left and right eyes of the spectacle frame, and the contactor for contacting the lens frames for the left and right eyes held by the holding means are provided. In the lens frame shape measuring device for measuring the shape of the lens frame by the contactor, the rotation center of the contactor when the rotation center of the contactor is arranged in the lens frame of each of the left and right eyes. And a geometrical center of the lens frame, the lens frame holding means is configured to calculate the distance between the geometrical center of the lens frame and the lens center. When the distance from the geometrical center of the frame is different, the lens frames for the left and right eyes are held based on the concentric circular index provided at the center of rotation of the rotation base. The center is the left and right eyes Settings are made to determine whether the distance (deviation) between the center of rotation of the contactor and the geometrical center of the lens frame when placed in each lens frame is within the allowable range. be able to. Moreover, when setting the spectacle frame (spectacle frame) to the lens frame shape measuring device,
The set position of the spectacle frame, that is, the left and right center of the spectacle frame is easily disposed substantially at the center of the lens frame shape measuring device, and when the shape of the left and right lens frames of the spectacle frame is measured, the moving center of rotation of the contactor and the lens The amount of deviation from the geometric center of the frame can be made substantially equal in the left and right lens frames.

Therefore, according to the invention as described above, a spectacle frame, such as a titanium frame, in which the material is soft, the lens frame (lens shape) is easily deformed, and the rim surface is not polished (plating etc.) Therefore, even in the case of eyeglass frames such as crab-eye lens frames, the frictional force from the lens frame groove can be reduced, and the contacts can be smoothly rotated. Can be measured.

[Brief description of drawings]

FIG. 1 is a control circuit of a spectacle lens conformity determining device according to the present invention.

2A is a schematic perspective view of an eyeglass lens compatibility determination device having the control circuit shown in FIG. 1, and FIG. 2B is an enlarged explanatory view of the control panel shown in FIGS. 1 and 2A. is there.

FIG. 3 is a control circuit diagram of the frame shape measuring device shown in FIG.

4 is an enlarged perspective view of the frame shape measuring device shown in FIG. 2 (a).

5A is a perspective view of a main part of the frame shape measuring apparatus shown in FIGS. 2A and 4, and FIGS. 5B and 5C show the relationship between the cylinder shaft and the operation shaft in FIG. FIG. 6 is a sectional view for explaining, and (d) is an explanatory view of a holding claw.

6 (a) to 6 (c) are operation explanatory views for holding the eyeglass frame of the frame shape measuring apparatus shown in FIGS. 2 (a), 4 and 5.

7A and 7B are explanatory views of a frame shape measuring unit and the like of the frame shape measuring device.

8A and 8B are explanatory views of a frame shape measuring unit and the like of the frame shape measuring device.

FIG. 9 is an explanatory diagram of a lens thickness measuring unit of the ball shaving machine shown in FIG.

10 (a), (b), and (c) are operation explanatory views of the feeler shown in FIG.

11 (a) to 11 (c) are explanatory views of the operation of the measuring unit of the frame shape measuring apparatus.

12 is an explanatory diagram showing another configuration of a lens thickness measuring unit of the ball shaving machine shown in FIG.

FIG. 13 is an explanatory diagram for measurement of a crab-eye lens.

FIG. 14 is an explanatory diagram for calculating the geometric center by the boxing system.

FIG. 15 is an explanatory diagram for obtaining a center of rotation of a tracing stylus.

FIG. 16 is an explanatory diagram of an optotype at a set position when the spectacle frame is set on the lens frame shape measuring device.

FIG. 17 is an explanatory view showing another example of the relationship between the frame shape measuring device of the present invention and the ball slide machine.

FIG. 18 is an explanatory view of a main part for explaining another embodiment of the present invention.

FIG. 19 is an explanatory view of a plate for changing the measurement pressure of FIG. 18.

FIG. 20 is an explanatory view of the operation of FIG. 18.

FIG. 21 is an explanatory diagram showing a display example of measurement results of rim thickness.

22A is an explanatory diagram for conventional lens frame measurement, and FIG. 22B is an explanatory diagram showing an example of a lens shape obtained by the measurement of FIG. 22A.

[Explanation of symbols]

1 ... Lens frame shape measuring device 15 ... Eyeglass frame holding mechanism (lens frame holding means) 43, 44 ... Holding claws (lens frame holding means) 51 ... Bevel groove (lens frame groove) 105. ..Slide base 107 ... Measuring unit moving motor (measuring unit moving driving means) 202 ... Rotating base 204 ... Base rotating motor (rotating driving means) 201 ... Upper slider 216 ... (Contact) 218 ... Measuring means 270 ... Arithmetic control circuit (control means) LF, RF ... Lens frame MF ... Eyeglass frame (eyeglass frame) OL, OR ... Rotation centers GL, GR ... Geometric center

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Claims (3)

[Claims] 1. A lens frame holding means for holding lens frames for the left and right eyes of a spectacle frame, and a contactor for contacting the lens frames for the left and right eyes held by the holding means. In the lens frame shape measuring device for measuring the shape of the lens frame, the center of rotation of the contactor and the geometrical center of the lens frame when the center of rotation of the contactor is placed in the lens frame of each of the left and right eyes. A lens frame shape measuring device comprising a control means for controlling a distance deviated from the lens frames of the left and right eyes to be substantially equal. 2. A lens frame holding means for holding the lens frames for the left and right eyes of a spectacle frame, and a contactor for contacting the lens frames for the left and right eyes held by the holding means. In the lens frame shape measuring device for measuring the shape of the lens frame, the lens frame holding means is a center of rotation of the contactor and a geometrical center of the lens frame when arranged in each of the lens frames of the left and right eyes. A lens frame shape measuring device, characterized in that, when the displaced distances are different, the lens frames of the left and right eyes are held based on concentric circular indexes provided at the center of rotation of the rotation base. 3. A lens frame holding means for holding the lens frames for the left and right eyes of a spectacle frame, and a contactor for contacting the lens frames for the left and right eyes held by the holding means. In the lens frame shape measuring device for measuring the shape of the lens frame, the center of rotation of the contactor and the geometrical center of the lens frame when the center of rotation of the contactor is placed in the lens frame of each of the left and right eyes. And a lens frame holding means for calculating the distance between the contact lens rotation center and the geometric center of the lens frame in each lens frame of the left and right eyes according to the calculation result of the calculation means. A lens frame shape measuring device, characterized in that, when the displaced distances are different, the lens frames of the left and right eyes are held based on concentric circular indexes provided at the center of rotation of the rotation base.