JP5372659B2 - Eyeglass shape measuring device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a glasses shape measuring device that has compound functions such as suppression of generating measurement error, prevention of deformation of a spectacle frame or the like without making the device itself larger. <P>SOLUTION: The glasses shape measuring device for measuring a lens shape of a spectacle frame includes a table 6 that turns at the center of a first axis orthogonally crossing the spectacle frame and is opposite to the spectacle frame and a contact removing mechanism 10 that supports a contact 9a in freely movable manner. The contact moving mechanism includes: a support shaft 12 that is installed in a table using a second axis as a center of an axis crossing orthogonally the first axis; a driving arm 13 that is rotatively supported by means of a supporting shaft and freely swing in the direction of a third axis crossing orthogonally the first and second axes; a driven arm 15 that is connected with the driving arm by means of a connecting shaft 16; and a contact arm 9 that is rotatively supported by the driven arm and has a contact arm 9 whose a contact 9a is projected to the spectacle frame from the surface of the table 6, and the contact arm is in contact with the spectacle frame. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a spectacle shape measuring apparatus that measures the shape of spectacles.

  2. Description of the Related Art Conventionally, there has been known a target lens shape measuring apparatus that measures a three-dimensional shape of an eyeglass frame by bringing a measuring element into contact with a lens groove of the eyeglass frame (see Patent Document 1).

JP 2001-174252 A

  In the apparatus of Patent Document 1, since the moving table is disposed on the rotating table, a space for arranging the moving table is required between the moving table and the spectacle frame disposed above the rotating table. When the measuring device itself becomes large, or when the moving table is moved on the rotating table with wheels, sliding generated between the wheels and the rotating table may cause measurement errors. If the plane form is deformed, the turntable is rotated at the time of shape measurement, so that the turntable is displaced up and down depending on the moving position of the turntable in the radial direction on the turntable. There is a risk of becoming. Further, when the support frame is supported by the support column and the moving base is supported by the support frame, the number of parts increases and it is easy to affect the measurement error. Furthermore, since the probe is brought into contact with the lens groove by the biasing force of the spring for biasing the movable table, there is a problem that the lens frame may be deformed by the biasing force.

  The present invention has been made in view of the above problems, and does not increase the size of the apparatus itself, and is provided with a composite function that makes it difficult to generate measurement errors and prevents deformation of the spectacle frame. The object is to provide an eyeglass shape measuring apparatus.

In order to solve the above problems, the spectacle shape measuring apparatus of the present invention is
In the spectacle shape measuring apparatus that measures the target lens shape of the spectacle frame by moving the contact that contacts the lens groove of the spectacle frame,
A spectacle frame holding unit for holding the spectacle frame at a measurement reference position;
A table that rotates around a first axis that is orthogonal to the lens placement surface of the spectacle frame held by the spectacle frame holding unit and whose front side faces the spectacle frame;
A contact moving mechanism that is provided on the table and supports the contact so as to be movable in a radial direction of the spectacle frame;
The contact moving mechanism includes:
A support axis installed on the back side of the table, with a second axis parallel to the table orthogonal to the first axis as the axis,
A main arm that is rotatably supported by the support shaft and whose lower side is swingable in a direction of a third axis that is also the radial direction orthogonal to the first axis and the second axis;
A lower side of the main drive arm is rotatably connected via a connecting shaft parallel to the second axis , and the upper side is swingable in the direction of the third axis about the connecting shaft. Arm,
With a lower side is rotatably connected via the parallel parallel axis and the second axis on the upper side of the driven arm toward the contacts disposed in the upper end portion from the surface of said table to said eyeglass frame are protruded, and the contact arm you move in the radial direction while contacting the contact lens groove of the spectacle frame,
A fixed gear fixed to the table about the second axis,
A driven gear fixed to the driven arm with the connecting shaft as an axis;
A drive means provided on the main drive arm and configured to swing the driven arm in the same direction while swinging the main drive arm;
An intermediate gear that is rotated by the driving means and meshes between the driven gear and the fixed gear ;
When the main arm of the contactor moving mechanism is in a free state, the contactor moving mechanism has a return force for returning the parallel axis of the contact arm to the center side in the radial direction by its own weight,
When the driving arm swings in the radial direction about the second axis of the support shaft as an axis center according to the return force by the driving means, the driven arm swings in the radial direction about the connection shaft. And the contact arm swings in the radial direction with the parallel axis as an axis, so that the contact is lightly contacted with the lens groove with a force that does not deform the spectacle frame, and the table The contact arm of the contact arm measures the target lens shape of the spectacle frame while rotating about the first axis .

By adopting the above configuration, since only the mechanism base point side of the contactor moving mechanism constituted by the main drive arm, the follower arm, the contact arm, etc. is installed on the back side of the table, even if the table rotates during shape measurement, Since the vertical position of the fixed position with respect to the rotational axis is not displaced, there is no influence on the measurement error, and good measurement data can be obtained. Further, the contact moving mechanism can be unitized and attached to one place, thereby simplifying the assembly of the spectacle shape measuring apparatus. In addition, since the unitized contact moving mechanism is attached to the back side of the table, there is no need for a space between the turntable and the lens frame as in the background art, and the measuring device itself is enlarged. There is nothing to do.

In the eyeglass shape measuring apparatus, when the driving arm of the contact moving mechanism is a free state, the contact moving mechanism returning force for returning the parallel axes of the contact arm to the center side in the radial direction by its entire own weight and has a degree in the main driving arm, the driven arm also drive means are provided for swinging in the same direction while swinging itself in response to the return force by the drive means, wherein the eyeglass frame is not deformed The contactor is brought into light pressure contact with the lens groove with a force of

By adopting the above configuration, in addition to the above effects, the main arm of the contactor moving mechanism is a form suspended from the mechanism base point side, and therefore its return force is always a direction to return to the center side in the radial direction, The return force returns with a different force depending on the distance from the upper side of the driven arm constituting the contact moving mechanism to the vertical axis, the inclination form of the contact arm, and so on. The adjustment of the driving torque, which is easy to variably control, can easily adjust the pressing force for light pressure contact, and in addition to preventing the deformation of the spectacle frame, it does not affect the bending of the contactor and contact arm. It is possible to provide a spectacle shape measuring apparatus that is useful for improving accuracy and durability.

In the eyeglass shape measuring device is fixed and the fixed gear fixed to said table the second axis as the axis, and a driven gear fixed to said follower arm the connecting shaft as the axis, the driving arms An intermediate gear that is rotated by the drive means, and the intermediate gear is provided between the driven gear and the fixed gear so as to mesh with both. Since the drive to be contacted is a gear mechanism, the pressing force can be reliably transmitted. Moreover, since it is a gear mechanism, the motor with an encoder can be used as the drive means, and a component structure can be simplified.

In the spectacle shape measuring apparatus , the number of teeth of the fixed gear is twice the number of teeth of the driven gear , the distance L1 from the axis of the support shaft to the axis of the connecting shaft, and the connecting shaft by the distance L2 to the axial center axis of the parallel axis, wherein the set equal to a movement of the contact by the contact moving mechanism can be a linear movement in the radial direction, which Thus, measurement errors due to movement of the contact during shape measurement can be eliminated.

In the contact moving mechanism of the spectacle shape measuring apparatus , an upper hook piece is hooked on a first support pin fixed to the table at a position coaxial with the second axis, and a lower side of the driven arm A tension spring having a predetermined tensile force in a state where the lower hook piece is hooked on the second support pin that is fixed at an end position closer to the lower end than the connecting shaft. characterized in providing a substantially counteract such retention the return force at any swing position of the driven arm by.

  With the above configuration, the contact can be moved with a light force, and as a result, the pressing force for light contact by the driving torque of the motor can be adjusted more easily as the driving means provided in the contact moving mechanism. Thus, in addition to preventing the deformation of the spectacle frame, it does not affect the bending of the contactor or the contact arm, so that it is possible to provide a spectacle shape measuring apparatus that is further useful for improving measurement accuracy and durability.

In the spectacle shape measuring apparatus , a template holding unit that holds the template at the measurement reference position, and a swing drive unit that swings the contact arm about the parallel axis on the lower side of the contact arm. And a lower movement restricting member provided on the contact arm, and a guide shaft horizontally mounted in the direction of the third axis so as to be movable forward and backward immediately below the lower movement restricting member. driving means, such that the contact arm is position rising from the surface of the table, and so as to abut the guide shaft that the lower movement restricting member is positioned directly below the row of the swinging movement of said contact arm Align a manner that the guide shaft is restricted to downward movement of the contact arm, wherein the the contact of the upper end of the contact arm, the back edge side of the contact arm on the opposite side in the radial direction, the mold plate Contact the outer periphery of the template held by the holding part By characterized by comprising a mold plate contact portion which, in addition to the above effects, the single contact arm, can be used for both the measurement of the measurement and template lens shape of the spectacle frame. In addition, since the downward movement of the contact arm is regulated during measurement of the template, the posture (not swinging) of the contact arm can be fixed, so that the accuracy of measuring the outer periphery of the template can be improved.

In the spectacle shape measuring apparatus , the template contact portion is point-contacted or line-contacted to the outer peripheral edge of the template, so that the contact at the time of shape measurement moves smoothly. Can be kept high.

In the spectacle shape measuring apparatus , the downward movement restricting member is a rotatable roller, whereby the movement of the contact arm in the radial direction becomes smooth, and high measurement accuracy can be maintained.

In the spectacle shape measuring apparatus , an angle detection unit that detects a rotation angle of the table, and a contact movement amount detection unit that detects a movement amount of the contact that moves in contact with the lens groove in a first axis direction. 3 based on a detection result detected by the radial movement amount detection means for detecting the radial movement amount of the contact, the angle detection means, the contact movement detection means, and the radial movement detection means. Control means for generating dimensional data, so that if it is a lens groove of a spectacle frame, its three-dimensional data can be acquired, and if it is a template, the radial movement amount and the table Two-dimensional data can be acquired by the rotation angle, and as a result, it can be used for lens processing.

1 is a schematic perspective view showing a spectacle shape measuring apparatus according to the present invention. The top view which shows spectacles shape measuring apparatus. The top view which shows the other example of a spectacles shape measuring apparatus. The perspective view which shows the other example of a template holding | maintenance part. The schematic perspective view which shows arrangement | positioning of the table of spectacles shape measuring apparatus. The schematic plan view which shows the moving mechanism of a table. The figure which shows the shape relationship between the lens groove | channel of a spectacles frame, and a contactor. The schematic perspective view which shows a contactor movement mechanism. The schematic side view which shows a contactor moving mechanism. The schematic perspective view which shows the contactor moving mechanism with which the balance spring was mounted | worn. The schematic side view which shows the contactor moving mechanism with which the balance spring was mounted | worn. The schematic side view which shows the contactor moving mechanism equipped with the contact arm downward movement control part. The schematic perspective view which shows the structure of a contact arm downward movement control part. The schematic diagram which shows the state which regulates the downward movement of a contact arm with a guide shaft. The side view which shows a template measurement state with a contact arm. The fragmentary sectional view which shows the example of a shape of the template contact part of a contact arm. The electric block diagram of a control apparatus.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic perspective view showing an example of a spectacle shape measuring apparatus according to an embodiment of the present invention, and FIG. 2 is a plan view showing the spectacle shape measuring apparatus. 1 and 2, an eyeglass shape measuring apparatus 1 includes an eyeglass frame W1 or a template W2 to be shape-measured in an opening 3 formed in an upper open shape on the center side of a body 2 formed in a box shape. Are arranged from above.

  On the upper side of the opening 3 of the main body 2, the spectacle frame holding portion 4 for holding the spectacle frame W 1 at the measurement reference position and on the upper side of the main body 2 for holding the template W 2 at the measurement reference position. The template holding part 5 is provided. As the measurement reference position, the spectacle frame W1 or the template W2 is in a substantially horizontal state in the opening 3, and the geometric center of the spectacle frame W1 or the template W2 is a reference along the horizontal direction indicated by the arrow A1. It is located on the line L.

  The spectacle frame holding part 4 includes a pair of sandwiching parts 4a that are opposed to each other in the front-rear direction indicated by the arrow A2 in the opening 3 and that approach and separate from each other synchronously, and the left and right rims W1a of the spectacle frame W1; W1b is sandwiched from the outside by upper and lower clamp pins 4b, and the spectacle frame W1 is held at the measurement reference position.

  The template holder 5 holds the template W2, which has been previously shaped as a lens, at the measurement reference position before processing a lens (not shown) for use in an edgeless frame as an example of the spectacle frame W1. To do. As shown in FIG. 4, the template holding portion 5 is formed in a substantially L shape, and fixes the template W2 to the distal end portion 5a1 on the long piece side 5a on the surface side W2a of the template W2. It has a template mounting part 5b. Further, the base 5d1 on the short piece side 5d is attached to the upper surface 2a of the main body 2 outside the opening 3 so as to be freely attached and detached using a magnet (not shown).

  This template holding part 5 can be configured to be disposed on one upper surface 2a of the main body 2 shown in FIG. 1 or to be disposed on two upper surfaces 2a of the main body 2 as shown in FIG. . In this case, the left and right templates W2 corresponding to the left and right rims W1a and W1b of the spectacle frame W1 are of one type, and are used with their front and back reversed. Further, when the long piece side 5a and the short piece side 5d of the template holding part 5 are configured integrally, and as shown in FIG. 4, the long piece side 5a and the short piece side 5d are relatively moved by a hinge mechanism 5e having a turning function. It is also possible to make it rotatable. According to this example, a template holder 5b for fixing the template W2 and a lens holder for fixing a lens (not shown) are provided on the front and back sides of the tip 5a1 on the long piece side 5a of one type of template holder 5. Is possible.

  Further, as shown in FIG. 5, on the bottom 3a side of the opening 3 of the main body 2, a first axis line orthogonal to the lens arrangement surface to be mounted in the lens groove W1c of the spectacle frame W1 in a horizontal plane on the bottom 3a side. A disk-shaped table 6 is provided that is rotatable about a vertical axis Z as the direction of the. The table 6 is movable in the left-right direction (arrow A1) in the opening 3. Then, the measurement is performed in such a manner that the spectacle frame W1 held by the spectacle frame holding unit 4 or the template W2 held by the template holding unit 5 and the surface side thereof face each other.

  As shown in FIG. 6, the table 6 is attached to a moving base 8 that can be moved by a slide guide 7. The slide guide 7 includes a guide rod 7a and a moving body 7b that is movably attached to the guide rod 7a. The slide guide 7 has a slide drive mechanism including a feed screw 7d connected to the rotation shaft of the motor 7c and a nut member 7e fixed to the moving base 8 screwed with the feed screw 7d. ing.

  The moving base 8 is provided with a rotatable roller 8 a that holds three positions on the outer peripheral side of the table 6. The table 6 is rotatably held by the roller 8a. Further, an outer peripheral gear 6a is provided on the outer peripheral side of the table 6, and a first drive gear 6c fixed to the rotating shaft of the first drive motor 6b as a DC motor is meshed with the outer peripheral gear 6a. . Further, a first encoder 6d is provided as an angle detection means for detecting the amount of movement of the table 6 in the rotation direction. The first encoder 6d may have a direct connection structure with the first drive motor 6b, and a so-called DC motor with an encoder is used. Further, a stepping motor can be used in place of the first drive motor 6b. This stepping motor is a motor whose angle is moved by a pulse angle determined by the motor in accordance with a pulse signal, and the angle can be detected by the number of pulses.

  Further, the table 6 protrudes upward from the surface of the table 6 and is formed on the inner peripheral surfaces of the rims W1a and W1b of the spectacle frame W1 in a fixed position (for example, a fixed groove) in the lens groove W1c shown in FIG. The eyeglass frame W1 includes a contact arm 9 having an elongated contact 9a having an end formed in a spherical shape on the tip side as an end so as to reduce the contact resistance while contacting the depth). A contactor moving mechanism 10 is provided which is supported so as to be movable in the radial direction R.

  As shown in FIGS. 6 and 8, an elongated slot 6e that extends in the thickness direction and extends in the radial direction R of the table 6 is formed at the center of the table 6, and through the slot 6e. The contact arm 9 protrudes upward from the surface of the table 6 so that the contact arm 9 is moved in the slot 6e.

  As shown in FIG. 8, the contact moving mechanism 10 is attached to the back side of the table 6. A semicircular fixed gear 11 is fixed to the mechanism base point side of the contact moving mechanism 10. The fixed gear 11 is arranged with the horizontal axis X as a second axis parallel to the table 6 orthogonal to the vertical axis Z as the first axis at the center of the gear 11 as an axis, and one of the slots 6e in the coaxial line direction. On the lower surface of the table 6 on the side, the arc-shaped gear portion 11a is fixed in a manner facing downward.

A support shaft 12 is fixed to the center of the fixed gear 11 (left and right horizontal axis X), and the lens groove W1c (glasses) orthogonal to the first axis and the second axis extends along the slot 6e by the support shaft 12. The upper side as one end side has a main arm 13 installed on the lower side of the table 6 so as to be swingable in the horizontal axis Y direction as the third axis which is also the radial direction R of the frame W1). ing.

  A second drive motor 14, which is a direct current motor as drive means, is fixed on the intermediate side of the arm length of the main drive arm 13. The second drive gear 14 a fixed to the rotation shaft of the second drive motor 14 is engaged with the gear portion 11 a of the fixed gear 11. As a result, when the second drive motor 14 is controlled to rotate and the second drive gear 14a is rotated in a predetermined direction, the main arm 13 swings in the third axis direction around the support shaft 12 (horizontal axis Y direction, radial direction R). Will move. The second drive motor 14 has a direct connection structure integrated with a second encoder 14b which is a radial movement amount detection means described later.

On the lower side as the other end side of the main driving arm 13, the lower side as the other end side of the driven arm 15 disposed below the table 6 on the other side of the slot 6 e in the horizontal horizontal axis X direction is the left and right horizontal axis line. They are connected by a connecting shaft 16 parallel to X (second axis) (see FIG. 10) . Thus, the driven arm 15 is moved in the third axial direction (horizontal axis Y direction, radial direction R) in conjunction with the main driving arm 13.

The connecting shaft 16 is provided with a driven gear 17 that allows the connecting shaft 16 to pass through the center of the gear. The driven gear 17 is connected and fixed to a lower side as the other end side of the driven arm 15 and meshes the driven gear 17 with the second drive gear 14 a of the second drive motor 14. Therefore, the second drive motor 14 (drive means) is fixed to the main drive arm 13, and the second drive gear 14 a fixed to the rotation shaft of the second drive motor 14 is between the fixed gear 11 and the driven gear 17. It meshes with both as an intermediate gear. As a result, when the second drive motor 14 is controlled to rotate and the second drive gear 14a is rotated in a predetermined direction, the main arm 13 swings around the support shaft 12 and interlocks with the main arm 13 to follow the arm 15. In the process of moving in the horizontal axis Y direction, the driven arm 15 swings in the third axis direction (horizontal axis Y direction, radial direction R) around the connecting shaft 16 ( axial center parallel to the left and right horizontal axis X ). It becomes.

  Further, as shown in FIG. 9, the number of teeth of the driven gear 17 is set to make the movement locus of the rotation center P1 of the upper side of the driven arm 15, for example, the rotation center P1 of the contact arm 9, linear in the horizontal direction indicated by the arrow A3. The number of teeth of the fixed gear 11 is set to be equal (twice), and the rotation center P2 of the main drive arm 13 (the axis of the support shaft 12) to the rotation center P3 of the driven arm 15 (the axis of the connecting shaft 16). The distance L1 to the center) and the distance L2 from the rotation center P3 of the driven arm 15 to the rotation center P1 of the contact arm 9 can be made equal, so that a linear motion mechanism using a so-called abduction syncloid gear train can be obtained. .

As shown in FIG. 8, the contact arm 9 has a parallel shaft 15 a in which the lower side as the other end is on the upper side as one end of the driven arm 15 and is parallel to the second axis (horizontal horizontal axis X). It is the axis of the. On the lower side of the contact arm 9, a lower gear portion 9c having an arc gear 9b is formed in an arc-shaped region having the parallel shaft 15a as a gear center. A third drive motor 18 as a DC motor that fixes the third drive gear 18 a meshing with the arc gear 9 b to the tip of the rotating shaft is fixed to the middle of the arm length of the driven arm 15. By controlling the operation of the third drive motor 18, the contact arm 9 swings in the third axial direction (horizontal axis Y direction, radial direction R) about the parallel shaft 15a . The third drive motor 18 has a direct connection structure integrated with a third encoder 18c as a contact movement amount detection means, and detects the movement amount when the contact arm 9 swings.

In short, as shown in FIG. 9, the contact moving mechanism 10 is configured such that the contact arm 9, the driven arm 15 and the main driving arm 13 constituting the contact moving mechanism 10 are swingably connected to each other , and the contact 9a of the contact arm 9 is connected to the eyeglasses. This is a structure in a suspended state in which the upper end portion of the main driving arm 13 on the mechanism base point side is fixed to the lower surface side of the table 6. Since the swing central axis (support shaft 12) of the main drive arm 13 is on the upper side, if the main drive arm 13 is in a free state ( the second drive motor 14 is in a free rotation state ) , the contactor moving mechanism 10 as a whole. The main arm 13 swings so as to approach the suspended state (that is, the central side in the radial direction R) by the restoring force due to its own weight.

Accordingly, if the parallel axis 15a on the upper side of the driven arm 15 (that is, the lower side of the contact arm 9 ) is located far from the vertical axis Z (that is, the central side in the radial direction R), the vertical axis Swing to approach Z. This is because the second drive gear 14a of the second drive motor 14 in the freely rotating state rotates and moves while meshing with the fixed gear 11, thereby rotating the driven gear 17 meshing with the second drive gear 14a. The arm 15 swings. Further, the return force of the contactor moving mechanism 10 is not the same depending on the distance from the parallel axis 15a on the upper side of the driven arm 15 to the vertical axis Z, the inclination form of the contact arm 9, and the like, and returns with a different force. Become.

  In addition, when the lens groove W1c of the spectacle frame W1 is measured, this restoring force is a force that causes the contact 9a to move away from the lens groove W1c (there is also a reverse direction). Then, the driving torque of the second drive motor 14 is brought into light pressure contact with the contact 9a with the lens groove W1c of the spectacle frame W1 according to the restoring force with a force that does not deform the spectacle frame W1. This light pressure contact includes a force that prevents the contact 9a or the contact arm 9 itself from being bent and deformed.

  In addition to the current control of the second drive motor 14, as shown in FIGS. 10 and 11, between the lower side of the driven arm 15, the gear center of the fixed gear 11, and the coaxial position (second axis X). By holding the balance spring 19 as a tension spring having a predetermined pulling force, a holding force that substantially cancels the restoring force at any swing position of the driven arm 15 due to the pulling force of the balance spring 19 is given. be able to.

Specifically, the hook piece 19a on one end side of the balance spring 19 is hooked on the first support pin 20 fixed to the table 6 side at the same position as the second axis, and on the other end side of the driven arm 15. The hook piece 19b on the other end side of the balance spring 19 is stretched on the second support pin 21 fixed to the end position closer to the other end than the connecting shaft 16. Accordingly, the weight of the contact moving mechanism 10 is substantially canceled by the pulling force of the balance spring 19, and the contact 9a can be moved with a light force.

Next, a contact arm downward movement restricting mechanism 22 is provided for use when measuring the outer peripheral shape of the template W2 held by the template holder 5. As shown in FIGS. 12 to 14, the contact arm lowering restricting mechanism 22 has a rotatable roller 23 having an axis in the second axis X direction on the side surface of the arc gear 9 b formed on the contact arm 9. The roller 23 is provided as a downward movement restricting member. Further, with the parallel shaft 15a on the other end side of the contact arm 9 as an axis, the third drive motor 18 as the swing drive means is actuated and the contact arm 9 protrudes from the surface of the table 6 so as to stand upward. It is, and, so as to form the advance and retreat beneath the rollers 23 in a state in which along the mold plate contact portion 9d to be described later to the first axis Z direction, the horizontal guide shaft 24 in the third axial direction (horizontal axis Y) It is built. The guide shaft 24 is fixed to a pair of movable pieces 26 that are rotatably provided about a third axis Y direction as an axis center on a pair of hanging pieces 25 fixed to the back surface of the table 6 at both ends. One of the movable pieces 26 is provided with a contact roller 27 that protrudes from the movable piece 26 in the third axial direction (horizontal axis Y).

  Further, on the lower side of the table 6, a drive mechanism unit 28 for moving the guide shaft 24 is provided. This drive mechanism 28 abuts the contact roller 27 at the tip of the rotation shaft of the fourth drive motor 29 as a DC motor, pushes down the contact roller 27, and positions the guide shaft 24 directly below the roller 23. It has the press cam 30 which drives like this. In addition, a return spring 31 is provided for separating the guide shaft 24 from directly below the roller 23.

  With the guide shaft 24 positioned just below the roller 23 as the lower movement restricting member of the contact arm 9, the contact arm 9 is swung by the third drive motor 18 to bring the roller 23 into contact with the guide shaft 24. In a mode in which the downward movement of the contact arm 9 is restricted, as shown in FIG. 15, the contact arm 9 on one end side of the contact arm 9 is opposite to the contact arm 9 on the opposite side in the radial direction R. The edge side is a template contact portion 9d that contacts the outer periphery of the template W2 held by the template holder 5. As shown in FIG. 16, the template contact portion 9d is formed in an arc shape or a triangular shape so as to have a tapered shape in a sectional shape so as to make point contact or line contact with the outer peripheral edge of the template W2. Has been.

  As a measurement of the lens groove W1c of the spectacle frame W1 and the template W2 by the spectacle frame shape measuring apparatus, the spectacle frame W1 is sandwiched from above by holding the spectacle frame W1 between the pair of clamp portions 4a with the gap between the pair of clamp portions 4a widened. Then, the left and right rims W1a and W1b of the spectacle frame W1 are sandwiched from the outside (up and down in this example) by the upper and lower clamp pins 4b (see FIG. 1), and the spectacle frame W1 is held at the measurement reference position. Next, the moving base 8 is moved below the left or right rim W1a, W1b to be measured so that the table 6 faces the spectacle frame W1.

  Next, the contact 9a of the contact arm 9 protruding upward from the surface of the table 6 is brought into contact with the lens groove W1c, and the first drive motor 6b is operated and controlled with this contact position as the origin position. The rotation angle of the table 6 detected by the first encoder 6d, which is the rotation angle detection means, and the radial movement amount detection means, until the contactor 9a starts from the origin position and goes around once and returns to the origin position. The amount of movement of the contact 9a in the lens groove W1c detected by the second encoder 14b by the diameter method R, and the first axial direction of the contact 9a detected by the third encoder 18c as contact amount detection means ( The amount of movement in the vertical axis Z direction) is detected.

  Based on the detection results detected by these various detection means, the target lens shape of the lens groove W1c is measured, and this target lens shape is generated by control means for generating three-dimensional data. As this control means, a control device 32 mainly using a microcomputer is used. Since the configuration of the microcomputer of the control device 32 is well known, detailed description thereof is omitted, but as shown in FIG. 17, the CPU 32a is mainly configured, and the CPU 32a includes a ROM 32c via an internal bus 32b. Connected. Various processes are executed in accordance with the program stored in the ROM 32c. A RAM 32d is connected to the CPU 32a via an internal bus 32b. The RAM 32d appropriately stores data and programs necessary for the CPU 32a to execute various processes.

  The input / output interface 32e of the control device 32 includes the first encoder 6d, the second encoder 14b, the third encoder 18c, the first drive motor 6b, the second drive motor 14, the third drive motor 18, the motor 7c, A four-drive motor 29 is connected to execute control of each motor, and based on a detection result from a detection signal from each encoder, three-dimensional data (when measuring the lens groove W1c), two-dimensional data (template W2 measurement) to be described later Time).

  Further, when measuring the formwork W2, the movement of the contact arm 9 in the vertical axis Z direction is regulated by bringing the roller 23 into contact with the guide shaft 24 as shown in FIG. As the template contact portion 9d is in parallel with the vertical axis Z direction as shown in FIG. 15, the table 6 is rotated once while contacting the peripheral edge of the mold W2, thereby causing the contact arm 9 to move in the radial direction R. Two-dimensional data is acquired by measuring the displacement in association with the rotation angle of the table 6 in the horizontal plane.

  Although the embodiments of the present invention have been described above, these are merely examples, and the present invention is not limited to these embodiments, and the knowledge of those skilled in the art can be used without departing from the spirit of the claims. Various modifications based on this are possible.

1 Eyeglass shape measuring device 4 Eyeglass frame holder
5 Template holder 6 Table
6d first encoder (angle detection means)
9 Contact arm 9a Contact
9d Template contact portion 10 Contact moving mechanism
11 Fixed gear
12 Support shaft 13 Main arm
14 Second drive motor (drive means)
14a Second drive gear (intermediate gear)
14b Second encoder (radial displacement detection means)
15 Follower arm
15a Parallel shaft 16 Connecting shaft
17 Driven gear
18 Third drive motor (oscillation drive means)
18c 3rd encoder (contact movement amount detection means)
19 Balance spring
19a, 19b Hook piece
20 First support pin
21 Second support pin
23 Roller (downward movement restricting member)
24 Guide shaft
32 Control device (control means)
R radial direction Z vertical axis (first axis)
X Horizontal horizontal axis (second axis)
Y horizontal axis (third axis)
W1 glasses frame W1c lens groove
W2 template

Claims (7)

In the spectacle shape measuring apparatus that measures the target lens shape of the spectacle frame by moving the contact that contacts the lens groove of the spectacle frame,
A spectacle frame holding unit for holding the spectacle frame at a measurement reference position;
A table that rotates around a first axis that is orthogonal to the lens placement surface of the spectacle frame held by the spectacle frame holding unit and whose front side faces the spectacle frame;
A contact moving mechanism that is provided on the table and supports the contact so as to be movable in a radial direction of the spectacle frame;
The contact moving mechanism includes:
A support axis installed on the back side of the table, with a second axis parallel to the table orthogonal to the first axis as the axis,
A main arm that is rotatably supported by the support shaft and whose lower side is swingable in a direction of a third axis that is also the radial direction orthogonal to the first axis and the second axis;
A lower side of the main drive arm is rotatably connected via a connecting shaft parallel to the second axis , and the upper side is swingable in the direction of the third axis about the connecting shaft. Arm,
With a lower side is rotatably connected via the parallel parallel axis and the second axis on the upper side of the driven arm toward the contacts disposed in the upper end portion from the surface of said table to said eyeglass frame are protruded, and the contact arm you move in the radial direction while contacting the contact lens groove of the spectacle frame,
A fixed gear fixed to the table about the second axis,
A driven gear fixed to the driven arm with the connecting shaft as an axis;
A drive means provided on the main drive arm and configured to swing the driven arm in the same direction while swinging the main drive arm;
An intermediate gear that is rotated by the driving means and meshes between the driven gear and the fixed gear ;
When the main arm of the contactor moving mechanism is in a free state, the contactor moving mechanism has a return force for returning the parallel axis of the contact arm to the center side in the radial direction by its own weight,
When the driving arm swings in the radial direction about the second axis of the support shaft as an axis center according to the return force by the driving means, the driven arm swings in the radial direction about the connection shaft. And the contact arm swings in the radial direction with the parallel axis as an axis, so that the contact is lightly contacted with the lens groove with a force that does not deform the spectacle frame, and the table The eyeglass shape measuring device, wherein the contact arm of the contact arm measures the target lens shape of the eyeglass frame while rotating about the first axis . The number of teeth of the fixed gear is twice the number of teeth of the driven gear , the distance L1 from the axis of the support shaft to the axis of the connecting shaft, and the axis of the connecting shaft to the parallel axis The eyeglass shape measuring apparatus according to claim 1 , wherein the distance L2 to the axis is set equal . In the contact moving mechanism, an upper hook piece is hooked on a first support pin fixed to the table at a position coaxial with the second axis, and more than the connecting shaft on the lower side of the driven arm. further to the second support pin which is fixed to the end position of the lower end closer, the tension spring having a predetermined tension while engaging the lower side of the hook piece is provided, all of the driven arm by the tension force of the cited tension spring Glasses shape measuring apparatus according to claim 1 or 2, characterized in providing a retaining force that cancels substantially the restoring force in the swing position. A template holding unit for holding the template at the measurement reference position;
Oscillating drive means for oscillating the contact arm around the parallel axis on the lower side of the contact arm;
A downward movement restricting member provided on the contact arm;
A guide shaft that is horizontally mounted in the direction of the third axis so as to be freely movable back and forth immediately below the lower movement restricting member,
The rocking drive means, such that the contact arm is position rising from the surface of the table, and so as to abut the guide shaft that the lower movement restricting member is positioned directly below, the swinging of the contact arm Make the move,
In embodiments where the guide shaft is restricted to downward movement of the contact arm, wherein the the contact of the upper end of the contact arm, the back edge side of the contact arm on the opposite side in the radial direction, the die plate holder in eyeglass shape measuring apparatus according to any one of claims 1 to 3, characterized in that the mold plate contact portion that contacts the outer peripheral edge of the held the template. The spectacle shape measuring apparatus according to claim 4 , wherein the template contact portion makes point contact or line contact with an outer peripheral edge of the template. The lower moving regulating member, eyeglass shape measuring apparatus according to claim 4 or 5, characterized in that a rotatable roller. Angle detection means for detecting the rotation angle of the table;
Contact amount detection means for detecting the amount of movement in the first axis direction of the contact that moves in contact with the lens groove;
A radial movement detection means for detecting the radial movement of the contact;
Control means for generating three-dimensional data based on detection results detected by the angle detection means, the contact movement amount detection means, and the radial movement amount detection means;
Glasses shape measuring apparatus according to any one of claims 1 to 6, characterized in that it comprises a.

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