JP4614279B2 - Calibration jig for eyeglass frame shape measuring device - Google Patents

Description

  The present invention relates to a calibration jig used for calibrating a measurement error of a spectacle frame shape measuring apparatus.

In a spectacle frame shape measuring apparatus that measures the shape of a spectacle frame or the like, a measurement error occurs due to long-term use or the like, and this measurement error is generally calibrated using a calibration jig.
Such a calibration jig (reference frame) 100 is described in Patent Document 1, and as shown in FIG. 9, a reference hole 102 having a planar view shape in a rim of a spectacle frame is formed in a metal plate 101. The tracing stylus 104 of the spectacle frame shape measuring apparatus to be measured is traced on the inner peripheral surface 103 of the reference hole 102. Measurement data of the inner peripheral surface 103 when the probe 104 of the spectacle frame shape measuring apparatus to be measured traces the inner peripheral surface 103 of the reference hole 102 in the calibration jig 100, and the reference hole 102 of the calibration jig 100. The measurement error of the spectacle frame shape measuring device to be measured is calculated by comparing with the reference data of the inner peripheral surface 103 in FIG.

JP-A-4-13539

  However, the rim shape of the spectacle frame is configured in a three-dimensional shape according to the shape of the spectacle wearer's face, but the inner peripheral surface 103 of the reference hole 102 of the calibration jig 100 is a two-dimensional shape. That is, the inner peripheral surface 103 is set with a radial displacement r and a rotational displacement θ. Therefore, in the calibration of the measurement error of the spectacle frame shape measuring apparatus using such a calibration jig 100, the above two-dimensional calibration is possible, but the three-dimensional calibration including the displacement in the height direction is impossible. Become.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a calibration jig for a spectacle frame shape measuring apparatus capable of performing three-dimensional calibration of measurement errors of the spectacle frame shape measuring apparatus. .

  The invention according to claim 1 is a calibration jig used to calibrate a measurement error of a spectacle frame shape measuring apparatus for measuring the shape of a spectacle frame or the like, and the tracing stylus of the spectacle frame shape measuring apparatus is traced. The trace groove is formed by being displaced in the radial direction, the rotational direction, and the height direction.

  The invention according to claim 2 is the invention according to claim 1, wherein the trace groove is formed on an inner peripheral surface of a hole provided in one plate-like body. .

  According to a third aspect of the present invention, in the invention of the first aspect, the trace groove is a frame groove that is formed on the inner periphery of the rim of the spectacle frame and for fitting the bevel of the spectacle lens. The rim is configured to be fixed to a frame body having higher rigidity than the rim.

  According to a fourth aspect of the present invention, in the third aspect of the present invention, the frame body includes a flat portion having openings provided corresponding to the pair of rims, and a standing member that stands on both sides of the flat portion. An upper portion and a lower portion of the rim are fixed to an edge of the flat portion facing the opening, and a wiping portion of the rim is fixed to the standing portion. .

  According to a fifth aspect of the present invention, in the invention according to any one of the first to fourth aspects, the trace groove regulates the tip portion by contacting both portions on the substantially opposite side of the tip portion of the measuring element. It is characterized by having a regulating surface.

  According to the first, second, or third aspect of the invention, in the calibration jig, the trace groove that is traced by the probe of the spectacle frame shape measuring device is formed by being displaced in the radial direction, the rotational direction, and the height direction. ing. Therefore, the measurement error of the spectacle frame shape measuring apparatus using this calibration jig can be calibrated in three dimensions, and accurate calibration can be realized.

  According to the fourth aspect of the present invention, the upper and lower parts of the rim of the spectacle frame are fixed to the edge facing the opening in the flat part of the frame, and the wisdom part of the rim is fixed to the standing part of the frame. Thus, the rim of the spectacle frame can be reinforced by the frame body without causing deformation.

  According to the invention described in claim 5, since the trace groove has a regulation surface that regulates the tip portion by contacting both portions on the substantially opposite side of the tip portion of the probe, Without moving away from the trace groove, it can move along the trace groove while always in contact with the regulating surface, and the calibration with the calibration jig can be performed accurately.

The best mode for carrying out the present invention will be described below with reference to the drawings.
[A] First embodiment (FIGS. 1 to 6)
1A and 1B show a first embodiment of a calibration jig of a spectacle frame shape measuring apparatus according to the present invention, where FIG. 1A is a front view, FIG. C) is a C arrow view of FIG. FIG. 4 is a perspective view showing the spectacle frame shape measuring apparatus as viewed from the front side. FIG. 5 is a perspective view showing the spectacle frame shape measuring apparatus of FIG. 4 as viewed from the rear side.

  The spectacle frame shape measuring apparatus 10 shown in FIGS. 4 and 5 has the shape of the left and right rims 2A and 2B of the spectacle frame 1 (FIG. 6), the shape of a frame template not shown, or the outer shape of a spectacle lens not shown. An opening 13 is formed at the center of the upper cover 12 on which the control panel 11 is installed on the front side. The eyeglass frame 1, the frame template or the eyeglass lens to be measured is carried into the opening 13.

  In the opening 13, a front presser base 14 is disposed on the front side of the spectacle frame shape measuring apparatus 10, and a rear presser base 15 is disposed on the rear side so as to be movable toward or away from each other. A plurality of pairs (for example, two pairs) of the pair of clamp pins 16 are installed on the pressers 14 and 15.

The front presser base 14 and the rear presser base 15 are moved closer to each other by the operator when the rims 2A and 2B of the spectacle frame 1 are carried into the opening 13 by the operator, and these rims 2A and 2B Is placed on the lower clamp pin 16 (FIG. 6). Thereafter, when the operator operates a start button (not shown) of the control panel 11, the upper and lower clamp pins 16 of the front presser base 14 and the rear presser base 15 grip the rims 2A and 2B. The position 15 is locked, and the spectacle frame 1 is attached to the spectacle frame shape measuring apparatus 10.
The spectacle frame 1 is attached to the spectacle frame shape measuring apparatus 10 with the rims 2A and 2B positioned downward and the temple 4 pivotally supported by the rims 3 of the rims 2A and 2B positioned upward.

  Further, as shown in FIG. 4, a rotary table 17 that is rotationally driven is mounted in the opening 13, and a long groove 18 is formed in the rotary table 17 so as to extend in the diameter direction of the rotary table 17. A stylus 19 as a measuring element is installed in the long groove 18. The stylus 19 is moved in the horizontal direction in the long groove 18 by a horizontal drive mechanism (not shown), and is lifted and lowered in the long groove 18 by a lifting mechanism (not shown). Further, the stylus 19 is rotated in the horizontal plane by the rotation drive of the rotary table 17.

  As described above, after the spectacle frame 1 is mounted on the spectacle frame shape measuring apparatus 10 using the front presser base 14, the rear presser base 15, and the clamp pin 16 (FIG. 6), the rotary table 17, the horizontal drive mechanism. The stylus 19 traces the frame grooves 20 formed on the inner peripheral surfaces of the rims 2A and 2B of the spectacle frame 1 attached by the action of the lifting mechanism. The frame groove 20 is a groove for fitting a bevel of a spectacle lens (not shown).

  The rims 2A and 2B of the spectacle frame 1 are generally formed in a three-dimensional shape curved corresponding to the shape of the face of the spectacle wearer. Therefore, the stylus 19 that traces the frame grooves 20 of the rims 2A and 2B has a three-dimensional shape measurement. The measurement data includes the radial displacement (horizontal direction) r of the stylus 19 and the rotational direction of the stylus 19 in the horizontal plane. Data of the cylindrical coordinate system represented by the displacement θ and the displacement z in the height direction (lifting direction) of the stylus 19 is obtained. From the measurement data of these displacements r, θ, and z, the shapes of the rims 2A and 2B of the spectacle frame 1 are measured.

  The measurement data r and θ are also measured using the stylus 19 for the shape of the frame template not shown and the outer peripheral shape of the spectacle lens. From these measurement data r and θ, the shape of the frame template and the outer peripheral shape of the spectacle lens are Measured.

  Now, in the spectacle frame shape measuring apparatus 10 as described above, a measurement error occurs due to long-time use or the like, and it is necessary to calibrate the measurement error using the calibration jig 30 shown in FIG. The calibration jig 30 includes rims 2A and 2B of the spectacle frame 1 connected by a bridge 5 and a frame body 31 that fixes and supports the rims 2A and 2B. The frame 31 is formed of a metal plate having higher rigidity than the rims 2A and 2B.

  The frame 31 includes a flat portion 33 having an opening 32 and a standing portion 34 that is integrally provided upright from both ends of the flat portion 33. The opening 32 corresponds to the pair of rims 2 </ b> A and 2 </ b> B coupled by the bridge 5, and is formed in, for example, a rectangular shape that inscribes the rims 2 </ b> A and 2 </ b> B.

  The upper and lower portions of the rims 2A and 2B are fixed to the upper edge 35 and the lower edge 36 facing the opening 32 of the flat portion 33 by using an adhesive 37, respectively. Further, the rim 3 of the rims 2 </ b> A and 2 </ b> B is fixed to the standing portion 34 via a bracket 38 by welding or the like. In this way, the rims 2A and 2B joined by the bridge 5 are firmly fixed and reinforced by the metal frame 31 having higher rigidity than the rims 2A and 2B. In addition, the code | symbol 41 in FIG. 1 shows a welding location, and the code | symbol 42 shows a leg part.

  The frame grooves 20 of the rims 2 </ b> A and 2 </ b> B in the calibration jig 30 configured in this way function as trace grooves that the stylus 19 of the spectacle frame shape measuring apparatus 10 traces. Since the rims 20A and 20B have a three-dimensional shape as described above, the frame groove 20 has a radial displacement r (FIG. 1A), a rotational displacement θ (FIG. 1A), and a height. It has a directional displacement z (FIG. 1B). These displacements r, θ, and z are measured in advance by the accurate spectacle frame shape measuring apparatus 10 or the like as reference values, and the circumference of the frame groove 20 (trace groove) calculated from the reference value is the reference circumference. Is displayed on the flat portion 33 of the frame 31 of the calibration jig 30, for example. In the present embodiment, the reference circumferential lengths of the frame grooves 20 in the rims 2A and 2B are displayed on the plane portion 33 as “L circumferential length” and “R circumferential length”.

  Here, as shown in FIG. 2, the frame groove 20 functioning as a trace groove is composed of inclined surfaces 39A and 39B substantially facing each other with a predetermined angle α. The inclined surfaces 39A and 39B are in contact with the substantially opposite portions 40A and 40B of the tip of the stylus 19, and these inclined surfaces 39A and 39B serve as restricting surfaces that restrict the tip of the stylus 19. Function. That is, even if the frame groove 20 has the aforementioned three-dimensional displacements r, θ, and z, the stylus 19 that traces the frame groove 20 contacts at least one inclined surface 39A, 39B of the frame groove 20. Therefore, detachment from the frame groove 20 is prevented.

  In order to calibrate the measurement error of the spectacle frame shape measuring apparatus 10 to be measured, the calibration jig 30 configured as described above is used. At this time, the calibration jig 30 is attached to the spectacle frame shape measuring apparatus 10 to be measured as shown in FIG. That is, when the calibration jig 30 is carried between the front presser base 14 and the rear presser base 15 of the spectacle frame shape measuring apparatus 10 to be measured in the same manner as when the spectacle frame 1 is mounted, the spectacles are concerned. The frame shape measuring apparatus 10 grips the outer portion of the flat surface portion 33 in the frame body 31 of the calibration jig 30 using the clamp pins 16 of the pressers 14 and 15.

  In this state, the spectacle frame shape measuring apparatus 10 to be measured causes the stylus 19 to trace the frame groove 20 in the rims 2A and 2B of the calibration jig 30, and the three-dimensional displacement (r, θ, z) of the frame groove 20 is determined. Then, the circumference of the frame groove 20 is calculated from the three-dimensional displacement data and measured. The eyeglass frame shape measuring apparatus 10 to be measured is adjusted by the operator so that the error between the measured circumference of the frame groove 20 and the reference circumference displayed on the calibration jig 30 is eliminated. Calibration of the spectacle frame shape measuring apparatus 10 to be measured is performed.

With the configuration as described above, the following effects (1) to (3) are achieved according to the above embodiment.
(1) The calibration jig 30 is configured by fixing the rims 2A and 2B of the spectacle frame 1 to the frame 31, and the stylus 19 of the spectacle frame shape measuring apparatus 10 traces the frame grooves 20 of the rims 2A and 2B. The trace groove is configured to have a displacement r in the radial direction, a displacement θ in the rotational direction, and a displacement z in the height direction. For this reason, the measurement error of the spectacle frame shape measuring apparatus 10 using the calibration jig 30 can be calibrated three-dimensionally, and accurate calibration can be realized.

  (2) In the calibration jig 30, the upper and lower portions of the rims 2 </ b> A and 2 </ b> B of the spectacle frame 1 are fixed to the upper edge 35 and the lower edge 36 facing the opening 32 in the flat portion 33 of the frame 31, respectively. Since the rim 3 part of the rims 2A and 2B is fixed to the standing portion 34 of the frame body 31, the rims 2A and 2B of the spectacle frame 1 can be reinforced by the frame body 31 without causing deformation. it can.

  (3) The frame groove 20 in the rims 2A and 2B of the calibration jig 30 is brought into contact with the substantially opposite portions 40A and 40B of the distal end portion of the stylus 19 of the spectacle frame shape measuring apparatus 10, so that the distal end portion is It has the inclined surfaces 39A and 39B to regulate. Therefore, the stylus 19 can move along the frame groove 20 in a state where the stylus 19 is always in contact with both the inclined surfaces 39A and 39B without detaching from the frame groove 20, and calibration by the calibration jig 30 can be performed. Can be implemented accurately.

[B] Second embodiment (FIGS. 7 and 8)
7A and 7B show a second embodiment of the calibration jig of the spectacle frame shape measuring apparatus according to the present invention, in which FIG. 7A is a front view, FIG. C) is a C arrow view of FIG. In the second embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  A calibration jig 50 shown in FIG. 7 has two holes 52 and 53 arranged side by side in a single plate-like body 51 made of synthetic resin or metal, and trace grooves are formed on the inner peripheral surfaces of these holes 52 and 53. 54 is formed.

  The holes 52 and 53 are formed in a circular shape or in a plan view shape of the rims 2A and 2B of the spectacle frame 1. The trace groove 54 has a radial displacement r (FIG. 7A), a rotational displacement θ (FIG. 7A), and a height displacement z (FIG. 7B). Composed. These displacements r, θ, and z are measured in advance by the accurate spectacle frame shape measuring apparatus 10 or the like as reference values, and the perimeter of the trace groove 54 calculated from the reference values is used as a reference perimeter, thereby correcting the calibration. It is displayed on the plate-like body 51 of the tool 50. In the present embodiment, the circumferential lengths of the trace grooves 54 of the holes 52 and 53 are displayed as “L circumferential length” and “R circumferential length”, respectively.

  Further, as shown in FIG. 8, the trace groove 54 also includes inclined surfaces 55 </ b> A and 55 </ b> B that are substantially opposed to each other with a predetermined angle β. These inclined surfaces 55A and 55B are in contact with both portions 40A and 40B on the substantially opposite side of the tip of the stylus 19 of the spectacle frame shape measuring apparatus 10, respectively. Therefore, when the stylus 19 traces the trace groove 54, the tip of the stylus 19 is regulated by contacting both the inclined surfaces 55A and 55B of the trace groove 54, and the stylus 19 is separated from the trace groove 54. Is prevented.

  The calibration jig 50 configured as described above is attached to the eyeglass frame shape measuring apparatus 10 to be measured in the same manner as the calibration jig 30. Then, the stylus 19 of the eyeglass frame shape measuring apparatus 10 to be measured traces the trace groove 54 in the holes 52 and 53 of the calibration jig 50, so that the displacements r, θ, and z of the three-dimensional shape of the trace groove 54 are obtained. Measurement is performed, and the circumference of the trace groove 54 in the holes 52 and 53 is calculated from the displacement and measured. The eyeglass frame shape measuring apparatus 10 to be measured is adjusted so that the error between the measured circumference of the trace groove 54 and the reference circumference is eliminated, and the eyeglass frame shape measuring apparatus 10 is calibrated. .

Therefore, according to the calibration jig 50 of the second embodiment, in addition to the following effect (4), the same effect as the effect (3) of the calibration jig 30 is obtained.
(4) In the calibration jig 50, the trace groove 54 traced by the stylus 19 of the spectacle frame shape measuring apparatus 10 is configured to have a radial displacement r, a rotational displacement θ, and a height displacement z. Therefore, the measurement error of the spectacle shape measuring apparatus 10 using the calibration jig 50 can be calibrated in three dimensions, and accurate calibration can be realized.

  As mentioned above, although this invention was demonstrated based on the said embodiment, this invention is not limited to this.

The 1st Embodiment in the calibration jig | tool of the spectacles frame shape measuring apparatus which concerns on this invention is shown, (A) is a front view, (B) is a B arrow view of FIG. 1 (A), (C) is a figure. It is a C arrow line view of 1 (A). It is sectional drawing which follows the II-II line of FIG. It is a perspective view which shows the state which mounted | wore the spectacles frame shape measuring apparatus with the calibration jig | tool of FIG. It is a perspective view which shows the spectacles frame shape measuring apparatus visually viewing from the front side. FIG. 5 is a perspective view showing the spectacle frame shape measuring apparatus of FIG. 4 as viewed from the rear side. FIG. 6 is a perspective view showing a state in which a spectacle frame is attached to the spectacle frame shape measuring apparatus of FIGS. 4 and 5. 2A and 2B show a second embodiment of a calibration jig of a spectacle frame shape measuring apparatus according to the present invention, in which FIG. 7A is a front view, FIG. It is a C arrow line view of 7 (A). It is sectional drawing which follows the VIII-VIII line of FIG. 7 (A). FIG. 10A is a front view of a conventional calibration jig, and FIG. 9B is a cross-sectional view taken along line IX-IX in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Glasses frame 2A, 2B Rim 3 Satoshi 10 Glasses frame shape measuring device 19 Stylus (measuring element)
20 Frame groove (trace groove)
39 Calibration jig 31 Frame body 32 Opening 33 Flat part 34 Standing part 35 Upper edge part 36 Lower edge part 39A, 39B Inclined surface (regulating surface)
50 Calibration jig 51 Plate 52, 53 Hole 54 Trace groove r Radial displacement θ Displacement in rotational direction
z Height displacement

Claims (3)

A calibration jig used to calibrate a measurement error of a spectacle frame shape measuring apparatus that measures the shape of a spectacle frame,
It is configured by arranging two holes side by side in a single plate-like body, and has a trace groove on the inner peripheral surface of each hole that is traced by the probe of the spectacle frame shape measuring device. , Formed by displacing in the radial direction, rotational direction and height direction,
A calibration jig for a spectacle frame shape measuring apparatus, wherein the circumference of the trace groove of each hole is displayed on the plate-like body as a reference circumference . The calibration jig for a spectacle frame shape measuring apparatus according to claim 1, wherein the plate-like body is made of resin . The trace groove, the spectacle frame shape measuring apparatus according to claim 1 or 2, characterized in that it has a regulating surface for regulating the tip by both parts of the substantially opposite side of the tip of the probe is in contact Calibration jig.

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