JP6071103B2 - Eyeglass frame shape measuring device - Google Patents

Description

  The present invention relates to a spectacle frame shape measuring apparatus that measures (traces) the shape of a rim of a spectacle frame.

  A frame holding mechanism that holds the right and left rims (lens frame) of the spectacle frame in the desired state, and a probe (stylus) inserted into the rim groove (bevel groove) is moved along the rim bevel groove, A measurement mechanism (trace mechanism) that obtains a three-dimensional shape of the rim by detecting the moving position of the probe in the radial direction (XY direction) and the direction perpendicular to the radial direction (Z direction) A shape measuring apparatus is known (for example, refer to Patent Documents 1 and 2).

  The apparatus of Patent Document 2 includes a probe holding unit that holds a probe axis to which a probe is attached so as to be movable in the Z direction, a Z moving unit having a motor that moves the probe holding unit in the Z direction, And controlling the driving of the motor of the Z moving unit based on the measurement result after the start of measurement. As a result, the tracing mechanism of the tracing stylus that follows the change in the Z direction of the rim becomes small, the tracing stylus is smoothly moved, and the shape of the rim is accurately measured.

  The frame holding mechanism has a clamp mechanism that is disposed on the front side and the rear side of the rim and clamps the rim with two clamp pins. When inserting the probe into the groove of the rim, it is usually at the center of the two clamp pins in the direction perpendicular to the moving radius so that the probe is positioned at the center of the front and rear width (front and rear) of the rim. When the probe is positioned and moved to the rim side, the probe is automatically inserted into the groove of the rim.

JP 2000-314617 A JP 2011-122898 A

  In recent years, the number of high curve frames in which the rim is largely along the ear side has increased. In some of these high curve frames, the rim groove is formed not on the center of the front-rear width of the rim but on the front side (or rear side). In such a rim, the measuring element does not enter the groove of the rim at the start of measurement, resulting in measurement failure.

  The present invention further improves the conventional apparatus and provides a spectacle frame shape measuring apparatus capable of inserting a measuring element into a rim groove by an operator's operation even when the measuring element is not automatically inserted into the rim groove. Is a technical issue.

In order to solve the above problems, the present invention is characterized by having the following configuration.
(1) Eyeglass frame shape for measuring the rim shape by moving the probe along the rim groove of the spectacle frame and detecting the radial direction of the rim and the position of the vertical probe perpendicular to the radial direction. A measuring device, comprising: a measuring element holding unit that holds the measuring element so as to be movable in the vertical direction; and vertical moving means that moves the measuring element holding unit in the vertical direction. A spectacle frame shape measuring device that starts measurement by bringing the probe into contact with the rim at a predetermined position and moves the probe holding unit so that the probe moves along the groove of the rim to measure the shape of the rim. A command signal input means for an operator to input a command signal for changing the vertical position of the probe at the measurement start position with respect to the predetermined position; and a command signal input by the command signal input means Based on Control means for controlling the vertical movement means to move the probe holding unit in the vertical direction, and mode selection means for selecting the first mode and the second mode of the trace mode,
When the first mode is selected, the control means moves the probe holding unit from the initial position to the rim side based on the input of the measurement start signal, and then the probe moves along the rim groove. The movement of the probe holding unit is controlled so as to move, and the shape of the rim is measured. When the second mode is selected, the probe holding unit is moved from the initial position based on the input of the measurement start signal. The stylus is moved to the rim side, the movement of the stylus holding unit is temporarily stopped based on the contact of the stylus with the rim, and then the stylus is moved to the rim based on the input of the measurement start signal again. The movement of the probe holding unit is controlled so as to move along the groove, and the shape of the rim is measured, and the command signal input by the operator is held in the second mode by the operator Wherein the movement of the knit is configured to be input when the state of being stopped.
(2) In the spectacle frame shape measuring apparatus of (1), the measuring element is held by the measuring element holding unit so as to be movable in the radial direction and the vertical direction, and the spectacle frame shape measuring apparatus holds the measuring element. First command means for detecting radial movement of the probe relative to the unit, and second detection means for detecting movement in the vertical direction of the probe relative to the probe holding unit, the command signal input The means includes a first command signal for moving the probe in a first direction in the vertical direction, and a second command signal for moving the probe in a second direction opposite to the first direction. The first command signal is input based on detection of the first detection means when the probe moves in the radial direction by an operator's operation, and the second command signal is For operator operation Therefore, the measuring element is configured to be input based on the detection of the second detecting means when it moves in the vertical direction.
(3) In the spectacle frame shape measuring apparatus according to claim 1, XY direction moving means for moving the measuring element holding unit in the XY direction which is a moving diameter direction of the rim, and a moving diameter of the measuring element with respect to the measuring element holding unit. Detecting means for detecting movement in the direction, and the control means controls the XY direction moving means to move the measuring element to the measuring element holding unit so as to move along the groove of the rim, Further, it is characterized in that it is detected that the measuring element contacts the rim based on a signal from the detecting means.

  According to the present invention, even when the measuring element is not automatically inserted into the groove of the rim, the measuring element can be inserted into the groove of the rim by the operation of the operator.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic external view of a spectacle frame shape measuring apparatus. The spectacle frame shape measuring apparatus 1 includes a frame holding unit 100 that holds the spectacle frame F in an expected state, and a measuring element (stylus) in a groove (bevel groove) of a rim of the spectacle frame held by the frame holding unit 100. And a measurement unit 200 that measures the three-dimensional shape (lens shape) of the rim by inserting and detecting the movement of the probe.

  A switch unit 4 is arranged in the device 1. The switch unit 4 includes a switch 4a for starting measurement in a mode in which the left and right rims are continuously measured, a switch 4b for starting measurement in a mode in which the right rim is individually measured, and a left rim individually. A switch 4c for starting measurement in the measurement mode. The switches 4a, 4b, and 4c also serve as switches as selection means for selecting each mode.

  A panel unit 3 having a touch panel display is disposed on the rear side of the casing of the apparatus 1. When processing the peripheral edge of the lens, it is possible to input lens layout data for the lens shape data, lens processing conditions, and the like through the panel unit 3. The three-dimensional shape data of the rim obtained by the apparatus 1 and the data input by the panel unit 3 are transmitted to the spectacle lens peripheral edge processing apparatus. In addition, the apparatus 1 is good also as a structure incorporated in a spectacles lens peripheral processing apparatus similarly to Unexamined-Japanese-Patent No. 2000-314617 etc.

  FIG. 2 is a top view of the frame holding unit 100 in a state where the eyeglass frame F is held. A measurement unit 200 is provided below the frame holding unit 100. On the holding part base 101, a first slider 102 and a second slider 103 for holding the spectacle frame F (right rim RIR, left rim RIL) substantially horizontally are placed. The first slider 102 has a surface that abuts on the upper side in the vertical direction of the left rim RIL and the right rim RIR of the frame F. The second slider 103 has a surface that contacts the lower side in the vertical direction of the left rim RIL and the right rim RIR.

  The first slider 102 and the second slider 103 are slidably arranged on the two rails 111 around the center line FL in the X direction, and are always directed toward the center line FL by the spring 113. Has been pulled in the direction.

  The first slider 102 has a rim thickness direction (for spectacle wearing) as a holding mechanism for holding the upper side of the left rim RIL and the right rim RIR (up and down of the rim means the vertical direction when wearing spectacles). Clamp pins 230a and 230b for clamping the left and right rims from the front side and the rear side of the hour are respectively arranged at two locations. Similarly, the second slider 103 also has clamp pins 230a and 230b for clamping the rim from the thickness direction of the rim as two holding mechanisms for holding the lower side of the left rim RIL and the right rim RIR. Has been placed. As the configuration of the frame holding unit 100, for example, a well-known one described in JP 2000-314617 A can be used.

  FIG. 3 is a schematic configuration diagram of a clamp mechanism 2300 disposed on the left side of the first slider 102 in order to clamp the upper side of the left rim RIL. A base plate 2301 is disposed inside the first slider 102. The clamp pin 230 a is attached to the tip of the first arm 2303. A central portion of the first arm 2303 is rotatably held by a rotation shaft 2304 with respect to the base plate 2301. The clamp pin 230 b is attached to the tip of the second arm 2305. A central portion of the second arm 2305 is rotatably held by a rotation shaft 2306 with respect to the base plate 2301. A compression spring 2307 is attached between the first arm 2303 and the second arm 2305. The interval between the two clamp pins 230a and 230b is always urged by the compression spring 2307 in the opening direction. In addition, a gear 2309 centering on the rotation shaft 2304 is formed at the center of the first arm 2303. Similarly, a gear 2311 centering on the rotation shaft 2306 is formed at the center of the second arm 2305, and the gear 2309 is engaged with the gear 2311.

  One end of a spring 2313 is attached to the rear end of the first arm 2303. A wire 2315 is fixed to the other end of the spring 2313. The wire 2315 is connected to the drive unit 2320 via a pulley 2317 that is rotatably attached to the base plate 2301. The drive unit 2320 includes a shaft 2321 for winding the wire 2315 and a motor 2322 for rotating the shaft 2321. When the wire 2315 is pulled by driving the motor 2322, the first arm 2303 is rotated clockwise about the rotation shaft 2304. At this time, since the gear 2309 and the gear 2311 are engaged with each other, the second arm is rotated counterclockwise about the rotation shaft 2306. Accordingly, the two clamp pins 230a and 230b are closed in conjunction with each other, and the rim RIL is clamped by the two clamp pins 230a and 230b.

  In order to clamp the upper side of the right rim RIR, the clamping mechanism disposed on the right side of the first slider 102 has a configuration in which the left and right sides of the clamping mechanism 2300 are reversed. In addition, in order to clamp the lower side of the left rim RIL and the right rim RIR, the clamp mechanisms arranged at the two positions on the left side and the right side of the first slider 102 are compared with the clamp mechanism 2300 arranged on the first slider 102. The vertical direction is the same as that inverted. Therefore, description of other clamp mechanisms is omitted. The motor 2322 and the shaft 2321 may be arranged in the four clamp mechanisms 2300, respectively, or may be used in common in the four clamp mechanisms 2300. In any case, the four clamp pins 230a and 230b are configured to be opened and closed simultaneously.

  4 to 7 are configuration diagrams of the measurement unit 200. FIG. FIG. 4 is a schematic configuration diagram of the moving unit 210. The measuring unit 200 includes a base portion 211 having a rectangular frame extending in the horizontal direction (XY direction), a measuring element 281 inserted into a bevel groove of the rim (RIL, RIR), and the measuring element 281 as a bevel of the rim. A moving unit 210 for moving along the groove. The base part 211 is disposed under the frame holding unit 100. The moving unit 210 includes a measuring element holding unit 250 that holds a measuring element shaft 282 with the measuring element 281 attached to the upper end, a Y moving unit 230 that moves the measuring element holding unit 250 in the Y direction, and a Y moving unit 230. An X moving unit 240 that moves in the X direction and a Z moving unit 220 that moves the probe holding unit 250 in the Z direction perpendicular to the XY direction. The radial direction of the rim when tracing the rim is set in the XY direction, and the vertical direction of the radial direction is set in the Z direction.

  The Y moving unit 230 includes a guide rail extending in the Y direction, and moves the probe holding unit 250 in the Y direction along the guide rail by driving the motor 235. The X moving unit 240 includes a guide rail 241 extending in the X direction, and moves the Y moving unit 230 in the X direction by driving a motor 245. The Z moving unit 220 is attached to the Y moving unit 230 and moves the probe holding unit 250 in the Z direction along the guide rail 221 extending in the Z direction by driving the motor 225.

  The configuration of the probe holding unit 250 will be described with reference to FIGS. The tracing stylus holding unit 250 holds the tracing stylus shaft 282 so as to be movable in the vertical direction (Z direction), and the tracing stylus shaft 282 is centered on a fulcrum set below the tracing stylus shaft 282. A vertical inclination holding unit (hereinafter referred to as VH unit) 280 that can be inclined in the tip direction (hereinafter referred to as direction H), and a rotation unit 260 that rotates VH unit 280 about an axis LO extending in the Z direction. . The measuring element 281 has a needle-like tip shape. In this example, in order to increase the strength of the probe 281, the probe 281 is formed in a shape that gradually decreases in diameter toward the tip. The tip 281a of the probe 281 is formed in a spherical shape. The radius of the spherical shape of the tip 281a is a size that can be inserted into a groove of a normal lens frame, and is preferably 0.3 to 0.5 mm. Accordingly, even when the rim is warped and the rim is inclined in the Z direction to a large extent (20 degrees or more), the rim is easily inserted into the bevel groove of the rim.

  FIG. 5 is an overall perspective view of the probe holding unit 250. The rotation unit 260 includes a rotation base 261 that holds the VH unit 280 and a motor 265 that rotates the rotation base 261. The rotation base 261 that holds the VH unit 280 is held by the Z movement support base 222 so as to be rotatable about an axis LO extending in the Z direction. The Z movement support base 222 is guided by the guide rail 221 shown in FIG. 4 and is moved in the Z direction by the drive of the motor 225. The rotation base 261 is rotated around the axis LO through a rotation transmission mechanism such as a gear by driving the motor 265. The rotation angle of the rotation base 261 is detected by an encoder 266 attached to the rotation shaft of the motor 265. When a pulse motor is used as the motor 265, the rotation angle of the rotation base 261 is controlled (managed) by the number of pulses for driving the motor 265.

  6 and 7 are explanatory diagrams of the configuration of the VH unit 280. FIG. A guide shaft 263 extending in the Z direction is fixed to the lower surface of the flange 262 formed integrally with the rotation base 261. FIG. 7 is an explanatory diagram of the VH unit 280 in a state where the rotary base 261, the flange 262, and the like are removed, and is an explanatory diagram of the VH unit 280 as viewed from the back side of the drawing with respect to FIG.

  The Z movement support base 270 (see FIG. 7) of the VH unit 280 is fixed to a cylindrical member 264 passed through the guide shaft 263. The VH unit 280 is held so as to be movable in the Z direction along the guide shaft 263 via the Z movement support base 270 and the cylindrical member 264. The movable range in the Z direction of the VH unit 280 is, for example, 4 mm. Further, the VH unit 280 is provided with a spring (biasing member) 267 between the flange 262 and the cylindrical member 264 in order to reduce the load or balance the load. The movement position of the VH unit 280 in the Z direction (movement position of the rotation base 261 in the Z direction) is detected by an encoder 268 that is a position detector (see FIG. 7). In order to cope with measurement of a high curve frame with a large warp, the Z moving unit 220 is configured such that the probe holding unit 250 can move in the Z direction within a range larger than the movable range of the VH unit 280 in the Z direction. Has been.

  The tracing stylus shaft 282 is held so as to be tiltable in the H direction about the axis S1 (fulcrum) via a bearing 271 held on the top of the Z movement support base 270. A rotation angle detection plate 283 is attached below the tracing stylus shaft 282 via an attachment member 284. The inclination angle (rotation angle) of the measuring element shaft 282 around the axis S1 in the H direction is detected by the encoder 285 that is a rotation angle detector via the rotation angle detection plate 283.

  Further, in order to limit the inclination of the probe 281 in the distal direction Ff, a limiting member 291 that is in contact with the left end of the mounting member 284 is attached to the plate 292 of the Z movement support base 270 in FIG. Yes. Further, as shown in FIG. 6, a spring (biasing member) 290 as a measurement pressure applying mechanism for applying a measurement pressure in the distal direction of the measuring element 281 is provided between the mounting plate 284 and the cylindrical member 264. Is arranged. A biasing force (measurement pressure) is always applied by the spring 290 so that the measuring element shaft 282 is inclined in the tip direction Hf of the measuring element 281. In the initial state before the measurement of the rim (in a state where the measuring element 281 is not in contact with the rim), the inclination of the measuring element shaft 282 is limited in the state of FIG. 7 by the attachment member 284 coming into contact with the limiting member 291. . This initial state is a state in which the probe axis 282 is inclined by a predetermined angle (2 degrees) in the direction Hr opposite to the tip direction Hf of the probe 281 with respect to the vertical Z axis. Further, in this initial state, the restriction mechanism 295 (see FIG. 6) is connected to the tracing stylus holding unit 250 so that the VH unit 280 is positioned in the middle (for example, 0.5 mm from the lower limit) with respect to the movable range in the Z direction. Is provided. When the tracing stylus shaft 282 is tilted in the direction Hr from the initial state, the restriction mechanism 295 is released, and the VH unit 280 (the tracing stylus 281) can freely move up and down from the intermediate position within the movable range in the Z direction. To be.

  FIG. 8 is a control block diagram of the apparatus 1. The control unit 50 is connected to motors 225, 235, 245, 265, encoders 268, 285, a panel unit 3, a switch unit 4, a memory 51 for storing measurement data, and the like.

  Next, the operation of the apparatus 1 having the above configuration will be described. First, the measurement operation when the bevel groove of the rim is at the center of the front-rear width of the rim will be described.

  As shown in FIG. 2, the operator holds the spectacle frame F between the first slider 102 and the second slider 103, and clamps the upper and lower sides of the left rim RIL and the right rim RIR with clamp pins 230a and 230b. Let The initial position of the measuring element 281 in the XY direction is set to a position COR (see FIG. 2) on the right rim RIR side. The X direction of the position COR is on the center line FL which is the center of the Y direction, and the Y direction of the position COR is a position where the clamp pins 230a and 230b for clamping the lower side of the right rim RIR are arranged.

  As the trace mode of the apparatus 1, “automatic trace mode” and “semi-automatic trace mode” described later are prepared. When the switch 4b is pressed, a measurement start signal for the right rim in the “automatic trace mode” is input, and automatic measurement of the right rim is started.

  At the initial position COR, the control unit 50 rotates the rotary unit 260 so that the tip direction of the probe 281 is directed to the lower clamp pins 230a and 230b of the right rim RIR. Further, as shown in FIG. 9, the control unit 50 controls the driving of the Z moving unit 220 (motor 225) and performs measurement so that the tip of the measuring element 281 is located at the center position Hc of the clamp pins 230a and 230b. The child holding unit 250 is raised (moved in the Z direction). FIG. 9 is a cross-sectional view of the rim in the Z direction at the initial measurement start point. Subsequently, the control unit 50 controls the driving of the Y moving unit 230 (motor 235), and moves the measuring element holding unit 250 (measuring element 281) so that the measuring element 281 placed at the initial position COR contacts the rim. Move to the rim side.

  When the bevel groove RV of the rim is at the center of the rim longitudinal width, the tip of the measuring element 281 is inserted into the bevel groove RV. Then, the tip of the probe 281 contacts the rim, and the probe holding unit 250 is further moved to the rim side, whereby the probe axis 282 is inclined in the direction Hr. It is detected by the encoder 285 that the measuring element shaft 282 is inclined from the initial state, and it is detected from the detection result that the measuring element 281 is in contact with the rim. At the initial measurement start point, the probe holding unit 250 is moved until the probe axis 282 is inclined at a predetermined angle (5 degrees) in the direction Hr.

  In the configuration example of the measurement unit 200 of the present apparatus, when measuring in the radial direction of the rim, the control unit 50 predicts the radial change of the unmeasured portion of the rim based on the radial information after the measurement is started (measured). Then, the XY position for moving the probe holding unit 250 is determined so that the tip of the probe 281 moves along the radial change of the unmeasured portion, and each motor of the moving unit 210 is driven according to the determined XY position. Control. Thereby, the measuring element 281 smoothly follows the rim change, and the moving radius of the rim can be accurately measured. Further, when measuring the rim in the vertical direction, the control unit 50 predicts the Z position change of the unmeasured portion of the rim based on the Z direction information after the measurement is started (measured), and follows the Z position change of the unmeasured portion. Thus, the Z position for moving the probe holding unit 250 is determined so that the tip of the probe 281 moves, and the drive of the Z moving unit 220 (motor 225) is controlled. Thereby, also in the measurement in the Z direction, the probe 281 smoothly follows the change in the rim, and the Z position of the rim can be measured with high accuracy. Further, as the Z position of the rim increases, the control unit 50 controls the moving unit 210 so that the inclination angle of the tracing stylus shaft 282 in the direction Hr increases. Thereby, it is possible to reduce the possibility that the probe 281 is detached from the bevel groove of the rim at the time of measuring the high curve frame.

  The measurement operation in the radial direction of the rim is executed as follows, for example. At the initial measurement start time, the control unit 50 assumes that the rim radius has changed in the X direction, and moves the probe holding unit 250 in the X direction so that the probe 281 moves in the X direction on the ear side. Moving. When the tip of the probe 281 is moved following the rim radius change, the probe shaft 282 is inclined. By detecting the inclination angle of the probe shaft 282 by the encoder 285, XY position information of the tip of the probe 281 with respect to the reference position of the probe holding unit 250 is obtained. When the control unit 50 obtains the radial information of a predetermined number of measurement points (for example, the number of 5 points when measuring the whole 1000 points) from the measurement start time, the control unit 50 changes the next measurement point (unmeasured point). Based on the prediction result, the probe holding unit 250 is moved in the XY directions so that the probe 281 follows the rim RIR.

  Further, the control unit 50 controls the driving of the motor 265 and rotates the rotation base 261 to rotate the VH unit 280 about the axis LO. The rotation angle at this time is determined so that the tip direction of the probe 281 is in the normal direction with respect to the predicted rim radial change. Alternatively, this rotation angle is determined as a radial angle around the position COR. By repeating this operation, radius vector information (measurement data) of the entire circumference of the rim is obtained. Note that the XY position information of the tip of the probe 281 with respect to the reference position of the probe holding unit 250 is obtained from the detection information of the encoder 285 and the rotation information of the VH unit 280. Radial radius information (measurement data) of the rim is obtained from the XY position information and the drive information of the motors 235 and 245 that move the probe holding unit 250 in the XY direction.

  The measurement operation in the radial direction of the rim is executed as follows, for example. After starting the measurement of the rim, the tracing stylus 281 and the tracing stylus shaft 282 are moved in the Z direction following the change of the rim in the Z direction. When the movement position of the measuring element shaft 282 in the Z direction is detected by the encoder 268, the Z position information of the measuring element 281 with respect to the reference position of the measuring element holding unit 250 is obtained. The Z position information (measurement data) of the rim is obtained from the Z position information and drive information of the motor 225 that moves the probe holding unit 250 in the Z direction.

  Next, as shown in FIG. 10, the measurement operation in the case where the bevel groove RV of the rim is formed to be biased to the front side with respect to the center of the front-rear width of the rim will be described. FIG. 10 is a cross-sectional view of the rim in the Z direction at the initial measurement start point. When the measurement start signal for the right rim in the “automatic trace mode” is input, as described above, the control unit 50 moves the probe 281 placed at the center position Hc at the initial position COR to the rim side, and performs measurement. When it is detected that the child 281 has contacted the rim, the measuring member 281 is moved in the X direction (the ear side direction of the frame). However, since the bevel groove RV is not located at the center position Hc of the clamp pins 230a and 230b, the measuring element 281 is not inserted into the bevel groove RV and is moved in the X direction while being in contact with the inner wall RIe of the rim. Become. The rim of the general frame F and the bevel groove RV are gradually raised toward the ear side of the rim. For this reason, when the measuring element 281 is moved in the ear direction in the X direction, the measuring element 281 is inserted into the bevel groove RV during the measurement, or is removed from the inner wall RIe of the rim. In this case, a measurement failure occurs.

  It can be determined as follows that a measurement failure occurred during the measurement. The measurement data (radial radius information) at each measurement point changes gradually while the probe 281 is moved in contact with the inner wall RIe of the rim. However, if the probe 281 enters the bevel groove RV from the contact position of the inner wall RIe or moves out of the inner wall RIe of the rim during measurement, the measurement data at the measurement point changes sharply. As a result, it can be determined that the measurement probe 281 is not inserted into the bevel groove RV at the measurement start point and the measurement is defective due to the factor that the measurement is started. When the control unit 50 determines a measurement failure, the control unit 50 stops the measurement operation and returns the measuring element 281 to the initial position COR. Further, the fact that the measurement is defective is displayed on the panel unit 3 (display).

  When the probe 281 is a defect that cannot be inserted into the bevel groove RV, the operator can input a signal for moving the probe 281 in the vertical direction by selecting the “semi-automatic trace mode”. The measuring element 281 can be inserted into the bevel groove RV. When the switch 4b is pressed for a long time (3 seconds or more), a start signal for “semi-automatic trace mode” is input. The controller 50 moves the placed probe 281 (measurer holding unit 250) from the initial position COR to the rim side. When it is detected that the probe 281 contacts the rim, the controller 50 moves the probe 281. Stop temporarily.

  In the “semi-automatic trace mode”, the motor 225 is driven by a command signal input by an operator's operation, and the probe 281 (the probe holding unit 250) is moved in the vertical direction (Z direction). . A command signal for moving the probe 281 downward by driving the motor 225 is input as follows.

  In FIG. 10, when the operator picks up the probe shaft 282 with a finger and tilts (moves) the probe shaft 282 in the Hr direction, which is the direction away from the rim, the inclination angle (movement amount) is detected by the encoder 285. The The encoder 285 that detects the moving position of the measuring element 281 in the radial direction is also used as an input unit for a command signal for moving the measuring element 281 (the measuring element holding unit 250) downward. The control unit 50 determines a moving amount for moving the measuring element holding unit 250 (the measuring element 281 and the measuring element shaft 282) downward according to the inclination angle (moving amount) detected by the encoder 285, and the motor 225. Control the drive. For example, when the tracing stylus shaft 282 is tilted by 1 degree in the Hr direction from the state of FIG. 10, the control unit 50 moves the tracing stylus holding unit 250 downward by 0.1 mm. When the operator releases the measuring element shaft 282, the measuring element shaft 282 is inclined toward the rim which is the tip direction (Hf) of the measuring element 281 by the biasing force of the spring 290. If the tip of the measuring element 281 is located in the range of the height of the bevel groove RV, the measuring element 281 is inserted into the groove RV by the biasing force of the spring 290.

  In order to cope with the case where the probe 281 wants to move too much below the bevel groove RV, a command signal for moving the probe 281 upward by driving the motor 225 is input as follows. When the operator picks up the probe shaft 282 with his finger and lifts the probe shaft 282 upward, the VH unit 280 is raised together with the probe shaft 282, and the raised position of the VH unit 280 is detected by the encoder 268. The encoder 268 that detects the vertical (upward and downward) movement position of the probe 281 is also used as an input unit for a command signal for moving the probe 281 (the probe holding unit 250) upward. The control unit 50 determines a moving amount for moving the probe holding unit 250 upward according to the rising amount of the VH unit 280 detected by the encoder 268, and controls the driving of the motor 225. For example, when it is detected that the VH unit 280 is moved upward by 0.1 mm, the control unit 50 moves the probe holding unit 250 upward by 0.1 mm. The operator can insert the measuring element 281 into the bevel groove RV by visually lifting the measuring element 281 to the position of the bevel groove RV.

  In this apparatus, in order to improve the followability of the measuring element 281 in the Z direction, the movable range in the vertical direction (Z direction) of the VH unit 280 (the measuring element 281) with respect to the measuring element holding unit 250 is, for example, 4 mm. It is limited to a narrow range. However, since the probe holding unit 250 is moved up and down by driving the motor 225 as described above, the operator can move the probe 281 up and down beyond the movable range of the VH unit 280. As a result, even with a frame that causes measurement failure in the “automatic trace mode”, it is possible to perform measurement by inserting the probe 281 into the bevel groove RV of the rim.

  The command signal for moving the probe holding unit 250 in the Z direction (vertical direction) may be configured to be input by a switch provided on the operation panel 3. However, in this case, the operator needs to operate the switch of the operation panel 3 with the other hand while holding the measuring element 281 with one hand. On the other hand, in the above example, since the encoders 285 and 268 are used as command signal input means for moving up and down, the operator moves the measuring element 281 up and down while holding the measuring element 281 with one hand. Command signals can be input. Thereby, the operator can easily perform an operation for inserting the measuring element 281 into the bevel groove RV.

  After the probe 281 is inserted into the bevel groove RV of the rim, when the measurement start signal is input again by the switch 4b, the control unit 50 causes the VH unit 280 to move to a predetermined position in the vertical direction with respect to the probe holding unit 250. For example, the stylus holding unit 250 is moved by driving the motor 225 so that the VH unit 280 is positioned at a height of 0.8 mm with respect to the stylus holding unit 250. Thereafter, the control unit 50 obtains shape data in the radial direction and the vertical direction of the rim by performing the same control as in the automatic trace mode. As a result, even in the “automatic trace mode”, even a rim that causes a measurement failure can be measured.

1 is a schematic external view of a spectacle frame shape measuring apparatus. It is a top view of a frame holding unit. It is a schematic block diagram of a clamp mechanism. It is a schematic block diagram of a movement unit. It is a whole perspective view of a measuring element holding unit. It is explanatory drawing of a structure of a vertical inclination holding | maintenance unit. It is explanatory drawing of a structure of a vertical inclination holding | maintenance unit. It is a control block diagram of an apparatus. It is sectional drawing of the rim | limb of the Z direction in an initial measurement starting point, and is explanatory drawing in case the bevel groove | channel of a rim exists in the center of the front-back width of a rim. It is explanatory drawing in case the bevel groove | channel of a rim is formed in the front side with respect to the center of the front-back width of a rim.

3 Panel unit 4 Switch unit 50 Control unit 100 Frame holding unit 200 Measuring unit 210 Moving unit 220 Z moving unit 225 Motor 230 Y moving unit 240 X moving unit 250 Measuring element holding unit 260 Rotating unit 268, 285 Encoder 280 Vertical tilt holding unit 281 probe 282 probe axis

Claims (3)

A spectacle frame shape measuring device that measures the shape of the rim by moving the probe along the rim groove of the spectacle frame and detecting the position of the rim in the radial direction and the direction perpendicular to the radial direction of the rim. A measuring element holding unit for holding the measuring element so as to be movable in the vertical direction, and a vertical moving means for moving the measuring element holding unit in the vertical direction, at a predetermined position in the vertical direction. In the spectacle frame shape measuring apparatus for measuring the shape of the rim by moving the measuring element holding unit so that the measuring element moves along the groove of the rim, by starting the measurement by bringing the measuring element into contact with the rim.
Command signal input means for an operator to input a command signal for changing the vertical position of the probe at the measurement start position with respect to the predetermined position;
Control means for controlling the vertical movement means based on the command signal input by the command signal input means, and for moving the probe holding unit in the vertical direction;
Mode selection means for selecting the first mode and the second mode of the trace mode,
When the first mode is selected, the control means moves the probe holding unit from the initial position to the rim side based on the input of the measurement start signal, and then the probe moves along the rim groove. The movement of the probe holding unit is controlled so as to move, and the shape of the rim is measured. When the second mode is selected, the probe holding unit is moved from the initial position based on the input of the measurement start signal. The stylus is moved to the rim side, the movement of the stylus holding unit is temporarily stopped based on the contact of the stylus with the rim, and then the stylus is moved to the rim based on the input of the measurement start signal again. Measuring the shape of the rim by controlling the movement of the probe holding unit so as to move along the groove of
The spectacle frame shape measuring apparatus according to claim 1, wherein the command signal input by an operator is input when the movement of the probe holding unit is stopped in the second mode. In the spectacle frame shape measuring apparatus according to claim 1,
The probe is held by the probe holding unit so as to be movable in the radial direction and the vertical direction,
The spectacle frame shape measuring apparatus includes a first detector that detects movement of the probe in the radial direction relative to the probe holding unit, and a second that detects movement of the probe in the vertical direction relative to the probe holding unit. Detecting means,
The command signal input means includes a first command signal for moving the probe in a first direction in the vertical direction and a second command for moving the probe in a second direction opposite to the first direction. 2 command signals can be input,
The first command signal is input based on detection of the first detection means when the probe moves in the radial direction by an operator's operation, and the second command signal is input by the operator's operation. A spectacle frame shape measuring apparatus, wherein the spectacle frame shape measuring apparatus is configured to be input based on detection by the second detection means when the camera moves in the vertical direction. In the spectacle frame shape measuring apparatus according to claim 1,
XY direction moving means for moving the probe holding unit in the XY direction that is the radial direction of the rim;
Detecting means for detecting movement in the radial direction of the probe with respect to the probe holding unit;
The control means controls the XY direction moving means to move the measuring element holding unit so that the measuring element moves along the groove of the rim, and based on a signal from the detecting means, the measuring element An eyeglass frame shape measuring apparatus for detecting that the rim is in contact with a rim.

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