JP7147249B2 - Conveyor - Google Patents

Description

The present disclosure relates to a transport device for transporting spectacle lenses.

An automatic transport device that transports a spectacle lens from a tray or the like on which the spectacle lens is placed to a measuring device for measuring the optical characteristics of the spectacle lens, a lens processing device for processing the peripheral edge of the spectacle lens, or the like is known. It is For example, a spectacle lens transported to the measuring device is clamped by a plurality of clamp pins provided on the measuring device.

JP 2014-233788 A

By the way, most unprocessed spectacle lenses have a perfect circular shape, but some have shapes other than a perfect circular shape. One example is that the raw spectacle lens has an elliptical shape in order to reduce the thickness of the spectacle lens. With the structure of the conventional clamp pin, it is difficult to clamp a spectacle lens having a shape other than a perfect circle, and it is sometimes impossible to properly align the measuring device and the spectacle lens.

In view of the above-described conventional technology, the technical problem of the present disclosure is to provide a conveying device that can stably hold a spectacle lens and accurately align the measurement device and the spectacle lens.

In order to solve the above problems, the present disclosure is characterized by having the following configurations.
(1) A conveying device according to a first aspect of the present disclosure is a conveying device for conveying a spectacle lens, and includes a pair of clamps consisting of a first pin and a second pin that clamp the spectacle lens from the lateral direction. a first clamp pin unit having pins; and a second clamp pin unit having a pair of clamp pins consisting of a third pin and a fourth pin for clamping the spectacle lens from a side direction different from the first clamp pin unit. , and the first pin and the second pin such that the first pin and the second pin maintain an equidistant distance from a first clamp center position of the first clamp pin unit. in the opening and closing direction , and the third pin and a second moving means for moving the fourth pin in the opening/closing direction, wherein the first pin and the second pin are arranged facing each other from the center position of the first clamp, and the third pin and the The fourth pin is arranged facing from the second clamp center position, the first clamp center position and the second clamp center position are the same position, and the vicinity of the center of the spectacle lens is positioned at the first clamp center position. and the second clamping center position, the first moving means and the second moving means are driven independently of each other , and the first clamp pin unit and the second clamp pin are attached to the spectacle lens. The spectacle lens is clamped by the clamp pin unit by moving the clamp pin unit until it contacts with the unit.

4 is a schematic external view of a conveying device; 4 is a schematic diagram of a lens transport unit; FIG. It is the figure which expanded the front-end|tip part of a 1st hand. It is the figure which expanded the front-end|tip part of a 2nd hand. It is a schematic diagram of an axis alignment unit. Fig. 3 is a schematic diagram of a clamping mechanism; It is the figure which expanded the 1st clamp pin with which a 1st clamp pin unit is provided. FIG. 4 is a schematic diagram of a second ring member; 1 is a schematic diagram of a lens processing unit; FIG. It is the figure which expanded the lens chuck axis|shaft. 3 is a block diagram showing a control system of the conveying device; FIG. It is the figure which looked at the clamping mechanism from the top.

<Overview>
An outline of a conveying device according to an embodiment of the present disclosure will be described. In addition, in the present embodiment, items classified by <> below can be used independently or in association with each other. In addition, in the present embodiment, a configuration in which an elliptical eyeglass lens (hereinafter referred to as a lens) is sandwiched using a conveying device is exemplified. It is also possible to clamp a spectacle lens.

For example, the transport device (for example, transport device 1) in the present embodiment is equipped with a lens processing device used for processing a lens, and the present disclosure can be applied to the transport device. Of course, at least part of the technology of the present disclosure may be applied in a lens processing apparatus. Such lens processing devices may be lensmeters, centering devices, cup mounting devices, and/or the like.

For example, the conveying device in this embodiment includes a first clamp pin unit (eg, first clamp pin unit 10). The first clamp pin unit has a pair of clamp pins consisting of a first pin (for example, first clamp pin 10a) and a second pin (for example, second clamp pin 10b) for clamping the lens from the lateral direction. Also, for example, the conveying device in this embodiment includes a second clamp pin unit (for example, the second clamp pin unit 20). The second clamp pin unit consists of a third pin (e.g., third clamp pin 20a) and a fourth pin (e.g., fourth clamp pin 20b) that clamp the lens from a side direction different from that of the first clamp pin unit. It has a pair of clamp pins.

It should be noted that the conveying device may be configured to include at least the first clamp pin unit and the second clamp pin unit. That is, the conveying device may include a third clamp pin unit, a fourth clamp pin unit, etc. in addition to the first clamp pin unit and the second clamp pin unit.

For example, the first clamp pin unit and the second clamp pin unit may clamp the lens from the lateral direction by bringing each pin closer so that the side surface of each pin is parallel (substantially parallel) to the side surface of the lens. . Further, for example, the first clamp pin unit and the second clamp pin unit may clamp the lens from the lateral direction by bringing the pins close to each other so that the side surfaces of the pins are oblique to the side surfaces of the lens. . That is, the clamp pin unit may clamp the lens from the lateral direction including the lateral side of the lens.

For example, the conveying device in this embodiment may include a first moving means (for example, the control section 280). The first moving means moves the pair of clamp pins of the first clamp pin unit in conjunction with each other in the opening/closing direction. Further, for example, the conveying device in this embodiment may include a second moving means (for example, the control section 280). The second moving means interlocks and moves the pair of clamp pins of the second clamp pin unit in the opening and closing direction. For example, by driving the first moving means and the second moving means independently of each other, the lens can be clamped by the clamp pin unit. For example, in this case, the distance that the first pin and the second pin of the first clamp pin unit move in the direction of clamping the lens, and the distance that the third pin and the fourth pin of the second clamp pin unit move in the direction of clamping the lens The lens may be clamped by the clamp pin unit by driving the first moving means and the second moving means so that the moving distance and the moving distance are different from each other.

For example, the first moving means and the second moving means may be separately provided. For example, in this case, a drive section (for example, a motor, etc.) for moving the first clamp pin unit and a drive section for moving the second clamp pin unit are the first moving means and the second moving means. You may provide each as a means. Thereby, the first moving means and the second moving means can be driven completely independently. That is, the first clamp pin unit and the second clamp pin unit can be moved independently to be opened and closed.

Further, for example, at least a part of the first moving device and the second moving device may be used. For example, in this case, the driving section for moving the first clamp pin unit and the driving section for moving the second clamp pin unit may be used as the first moving means and the second moving means. good. That is, one driving section may move the first clamp pin unit and the second clamp pin unit. For example, in such a configuration, even if one of the first moving means and the second moving means stops driving, the driving of the other does not stop, so that the first moving means and the second moving means may be driven independently.

As an example, a description will be given of a case where one drive unit starts moving the first clamp pin unit and the second clamp pin unit, and the first clamp pin unit contacts the lens earlier than the second clamp pin unit. For example, the stop of opening and closing of the first clamp pin unit may be configured so as not to interfere with the opening and closing of the second clamp pin unit. That is, even if the opening and closing of the first clamp pin unit is stopped by contacting the lens, the opening and closing of the second clamp pin unit may be continued by continuing to drive the drive section. This allows both the first clamp pin unit and the second clamp pin unit to move until they come into contact with the lens. Even if the second clamp pin unit comes into contact with the lens before the first clamp pin unit, the stopping of the opening and closing of the second clamp pin unit does not interfere with the opening and closing of the first clamp pin unit. By doing so, both the first clamp pin unit and the second clamp pin unit can be moved until they come into contact with the lens. That is, the first clamp pin unit and the second clamp pin unit are independently moved to be opened and closed.

For example, the conveying device in this embodiment includes a first clamp pin unit having a pair of clamp pins for clamping the lens from the lateral direction, and a clamp pin unit for clamping the lens from the lateral direction different from the first clamp pin unit. and a second clamp pin unit having a pair of clamp pins, and the first clamp pin unit and the second clamp pin unit are moved independently of each other in the opening and closing directions. As a result, for example, even if the lens has an elliptical shape, the clamp pins provided in each clamp pin unit come into contact with the side surfaces of the lens from both the major axis direction and the minor axis direction of the lens. Therefore, the lens can be held stably.

For example, the first pin and the second pin included in the first clamp pin unit may be arranged equidistantly from the clamp center position (for example, clamp center position D1) of the clamp pin unit. Also, the first pin and the second pin may be arranged to face each other. In addition, the first pin and the second pin may be arranged at the same distance from the center position of the clamp and facing each other. Also, the first pin and the second pin may be arranged equidistant from the center position of the clamp and not facing each other. Also, the first pin and the second pin may be arranged at different distances from the center position of the clamp and facing each other. Also, the first pin and the second pin may be arranged at different distances from the center position of the clamp and not facing each other.

Similarly, for example, the third pin and the fourth pin of the second clamp pin unit may be arranged equidistant from the clamp center position (for example, clamp center position D2) of the clamp pin unit. Also, the third pin and the fourth pin may be arranged to face each other. In addition, the third pin and the fourth pin may be arranged at the same distance from the center position of the clamp and facing each other. Also, the third pin and the fourth pin may be arranged equidistant from the center position of the clamp and not facing each other. Also, the third pin and the fourth pin may be arranged at different distances from the center position of the clamp and facing each other. Also, the third pin and the fourth pin may be arranged at different distances from the center position of the clamp and not facing each other.

For example, the clamp center position is the point of contact when the first and second pins or the third and fourth pins are brought into contact with each other. In addition, when the side of the second pin is viewed from the side of the first pin (or when the side of the fourth pin is viewed from the side of the third pin), each pin is opposed to each other. It suffices that they face each other to such an extent that at least a part thereof overlaps each other. That is, the angle between the straight line connecting the first pin and the center of the clamp and the straight line connecting the second pin and the center of the clamp does not necessarily have to be 180 degrees.

For example, in this embodiment, the first pin and the second pin provided in the first clamp pin unit are arranged to face each other at an equal distance from the clamp center position of the clamp pin unit, and the third pin provided in the second clamp pin unit is arranged to face each other. A pin and a fourth pin are arranged at an equal distance from the clamp center position of the clamp pin unit and facing each other. For example, if the lens has an elliptical shape, the distances from the center of the lens to two points on the side surface of the lens located on a straight line passing through the center of the lens are equal. When the center of the lens is aligned with the center of the clamp, the first pin and the second pin are arranged at the same distance from the center of the clamp and face each other, so the distance until each pin contacts the side of the lens can be made equal. Similarly, by arranging the third pin and the fourth pin to face each other at the same distance from the center position of the clamp, the distance until each pin contacts the side surface of the lens can be the same. Therefore, the lens can be stably held and the lens can be easily centered.

The distance from the first and second pins to the center position of the clamp and the distance from the third and fourth pins to the center position of the clamp may be different or may be the same (that is, equidistant). There may be. If the distance from the 1st and 2nd pins to the center of the clamp and the distance from the 3rd and 4th pins to the center of the clamp are set to different distances, it will be difficult to clamp the lens between the pins. , the lens can be held stably by considering the major axis direction and the minor axis direction of the lens. For example, the clamp pin unit with a long distance from each pin to the center of the clamp clamps the long axis of the lens, and the clamp pin unit with a short distance from each pin to the center of the clamp clamps the short axis of the lens. The position of the clamp pin or the orientation of the lens may be adjusted as desired.

For example, in this embodiment, the distance from the first and second pins to the clamp center position and the distance from the third and fourth pins to the clamp center position are set to be equal. As a result, the lens can be accommodated in each pin without considering the orientation of the lens with respect to each clamp pin unit, so the lens can be easily clamped. It also makes it easier for the lens to be centered (aligned).

Further, for example, in this embodiment, the first pin and the second pin of the first clamp pin unit and the third pin and the fourth pin of the second clamp pin unit have the same circumference around the clamp center position. They may be arranged at regular intervals in the upper circumferential direction. That is, the first and second pins of the first clamp pin unit and the third and fourth pins of the second clamp pin unit are arranged so that the angles formed by the straight lines connecting each pin and the center position of the clamp are equal. A pin and may be placed. For example, if the first pin, the second pin, the third pin, and the fourth pin are not evenly spaced, there will be a direction in which the lens is strongly clamped and a direction in which the lens is weakly clamped. , the lens can be held uniformly, and the lens can be held more stably.

For example, the conveying device in this embodiment may comprise control means (for example, the control section 280). A control means controls the position of the lens with respect to the clamp pin unit. For example, the control means may control the position of the lens such that the center of the lens is positioned near the center position of the clamp. In this case, the control means detects the center of the lens held by the lens transport unit (for example, lens transport unit 200) for transporting the lens using the measurement unit (for example, measurement unit 300), and detects the center of the lens. The drive of the lens conveying unit may be controlled so that the center of the lens that has been clamped coincides with the center position of the clamp. For example, when manually controlling the position of the lens so that the center of the lens is located near the center position of the clamp, , the lens placement position may be guided.

For example, the conveying device in this embodiment controls the position of the lens so that the center of the lens is located near the center position of the clamp, and the lens positioned by the control means is clamped by the first moving means and the second moving means. do. That is, the control means conveys the lens so that the center of the lens is positioned near the clamp center position, and the first clamp pin unit and the second clamp pin unit clamp the lens positioned by the control means. For example, clamping a lens whose position is controlled in advance using each clamp unit facilitates adjustment when the lens is centered. In this embodiment, the center of the lens may be at least either the geometric center or the optical center of the lens.

For example, the conveying apparatus in this embodiment may include determination means (for example, control unit 380). The determination means determines whether or not the center of the lens coincides with the center position of the clamp. For example, the determination by the determination means may be always performed when the lens is transported by the lens transport unit, or may be performed at the timing when the transported lens is clamped by the clamp pin unit.

For example, the determination means may determine that the center of the lens and the center position of the clamp match when the center of the lens is positioned within a predetermined allowable range around the center position of the clamp. Further, for example, the determination means determines that the center of the lens and the center position of the clamp do not match when the center of the lens is not positioned within a predetermined allowable range around the center position of the clamp. good too. The predetermined permissible range may be set in advance based on experiments, simulations, or the like, or may be set arbitrarily.

For example, based on the determination result by the determination means, at least one of the first moving means and the second moving means again implements clamping of the lens by the clamp pin unit, and the center of the lens and the clamp center position of the clamp pin are adjusted. may be matched. That is, when the determination means determines that the center of the lens and the center position of the clamp do not match, the lens is clamped by the clamp pin unit again to match the center of the lens and the center position of the clamp pin. You may do so.

In this case, only the first moving means may be controlled and clamping by the first clamp pin unit may be performed again. Only the second moving means may be controlled and clamping by the second clamp pin unit may be performed again. Of course, by controlling the first moving means and the second moving means, clamping by the first clamp pin unit and the second clamp pin unit may be performed again. For example, re-clamping by the first clamp pin unit and the second clamp pin unit may be alternately and repeatedly performed so that the center of the lens and the clamping center position of the clamp pin gradually coincide. For example, when the spectacle lens is clamped, even if the center of the spectacle lens and the clamping center position of the clamp pin do not match, by providing such a configuration, it is possible to accurately center the spectacle lens. .

For example, the conveying device in this embodiment includes lens support means (for example, a lens support portion) for placing a lens, and lens holding means (for example, a lens axis position setting means for setting the axis position, which is the attachment position of the chuck shaft, to the lens, and the axis position setting means for setting the axis position of the lens placed on the lens support means (for example, and a measurement optical system 310). Further, for example, the conveying device in this embodiment is cup mounting means for mounting a cup for holding the lens on the lens holding means to the lens based on the axis-aligned position set by the axis-aligned position setting means, and a cup attachment means (eg, cup attachment portion) for attaching the cup to the surface of the lens placed on the lens support means. For example, the axis alignment position may be at least one of the optical center position, the geometric center position, and the like of the lens.

<Example>
Exemplary embodiments of the present disclosure will now be described with reference to the drawings. FIG. 1 is a schematic view of the appearance of the conveying device. The transport device 1 transports spectacle lenses. For example, the transport device includes a tray transport unit 100, a lens transport unit 200, a measurement unit 300, a lens processing unit 400, and the like.

The tray transport unit 100 transports the tray 500 on which the pair of left and right lenses LE are placed to a predetermined transfer position. The lens transport unit 200 holds and transports the lens LE between the tray 500 placed at a predetermined transfer position and the measurement unit 300 . Also, the lens transport unit 200 holds and transports the lens LE between the tray 500 placed at a predetermined delivery position and the lens processing unit 400 . The measurement unit 300 detects the optical center of the lens LE held by the lens transport unit 200 and measures its optical characteristics. The lens processing unit 400 grinds the lens LE. The configuration of each device will be described below in order.

<Tray transfer unit>
For example, the tray transport unit 100 is configured with a belt conveyor 101 . A tray 500 is placed on the belt conveyor 101, and attached to the tray 500 is an ID tag 501 in which the work number of the lens LE is stored. The tray 500 is sequentially conveyed in the direction of arrow A, and stopped at a predetermined position Q1 where the lens conveying unit 200 delivers the lens LE. The ID tag 501 on the tray 500 is read by an ID tag reader 502 arranged at a predetermined position Q1.

<Lens transport unit>
FIG. 2 is a schematic diagram of the lens transport unit 200. As shown in FIG. The lens transport unit 200 includes a first hand 210, a second hand 220, an XYZ moving mechanism 230, and the like. The XYZ movement mechanism 230 moves the first hand 210 and the second hand 220 in the horizontal direction (X direction), the vertical direction (Y direction), and the front-back direction (Z direction). The XYZ movement mechanism 230 includes a transport base 231, rails 232, an X movement base 240, a Y movement base 250, and the like.

The transport base 231 extends parallel to the tray transport unit 100 , the measurement unit 300 and the lens processing unit 400 . A rail 232 is provided on the transport base 231 . The X movement base 240 is attached so as to be movable in the left-right direction (X direction) on the rail 232 . A motor 235 is attached to the transport base 231 . Ball screw 234 is connected to the rotating shaft of motor 235 . A connecting block 236 is fixed to the X movement base 240 and screwed with the ball screw 234 . For example, when motor 235 is driven, ball screw 234 rotates, and connecting block 236 and X movement base 240 fixed to connecting block 236 move along rail 232 in the X direction.

The guide shaft 233 is fixed to the X movement base 240 . Motor 237 is attached to X movement base 240 . Ball screw 243 is connected to the rotating shaft of motor 237 . Y movement base 250 is screwed with ball screw 243 . For example, when the motor 237 is driven, the ball screw 243 rotates and the Y movement base 250 moves along the guide shaft 233 and the ball screw 243 in the Y direction.

Holder 238 is pivotally mounted on Y movement base 250 . Motor 239 is provided within Y movement base 250 . For example, when the motor 239 is driven, the holder 238 turns 180 degrees via a gear (not shown) attached to the rotating shaft of the motor. The first hand 210 is a lens holding portion for sucking and holding the unprocessed lens LE, and is provided at one end of the holder 238 . The second hand 220 is a holding portion for sucking and holding the processed lens LE, and is provided at the other end of the holder 238 . The first hand 210 and the second hand 220 are held by the holder 238 so as to be movable in the vertical direction (Z direction) by the motors 241 and 242, respectively.

FIG. 3 is an enlarged view of the tip portion of the first hand 210. As shown in FIG. A suction base 211 is fixed to the tip of the first hand 210 . For example, the suction base 211 in this embodiment is formed in a U-shape (substantially U-shape) so as not to interfere with the measurement of the optical characteristics of the lens LE by the measurement unit 300, the detection of marks such as marking points, and the like. . The suction base 211 is provided with three suction pieces 212 on its lower surface. For example, the suction pieces 212 in this embodiment are arranged at regular intervals around the XZ-direction holding reference axis L1 of the first hand 210, and suction the surface of the unprocessed lens LE. Each suction piece 212 is provided with a suction hole, and the suction hole communicates with the tube 213 through an air passage formed inside the suction base 211 and the first hand 210 . The tube 213 is connected to a pump unit 214 for sucking and delivering air. For example, when the pump unit 214 is driven to suck, the lens LE is sucked and held by the suction piece 212 . Further, for example, when the suction driving of the pump unit 214 is stopped, the suction returns to the atmospheric pressure, and the suction holding of the lens LE is released.

FIG. 4 is an enlarged view of the tip portion of the second hand 220. As shown in FIG. A suction base 221 is fixed to the tip of the second hand 220 . A trumpet-shaped suction piece 222 is provided on the lower surface of the suction base 221 around the XZ-direction holding reference axis L2 of the second hand 220 . A suction hole is provided in the suction piece 222 , and the suction piece 222 communicates with the tube 223 through an air passage formed inside the suction base 221 and the second hand 220 . The tube 223 is connected to a pump unit 224 for sucking and delivering air. For example, by driving the pump unit 214, similarly to the first hand 210, the suction holding of the lens LE by the suction piece 222 and its release are performed.

For example, with such a configuration, the lens transport unit 200 moves the first hand 210 and the second hand 220 in the horizontal direction (X direction), the vertical direction (Y direction), and the front-back direction (Z direction). Also, the lens LE sucked and held by the first hand 210 and the second hand 220 is transported to the measurement unit 300 and the lens processing unit 400 . Note that the first hand 210 and the second hand 220 may be configured to hold the peripheral edge of the lens LE, and are not limited to this embodiment.

<Measurement unit>
FIG. 5 is a schematic diagram of the measurement unit 300. As shown in FIG. The measurement unit 300 has a measurement optical system 310 inside a housing 301 . For example, the measurement unit 300 includes a measurement optical system for detecting at least the optical characteristics of the lens LE, and lens information different from the optical characteristics (for example, the outer shape of the lens, the marking points attached to the lens, etc.). with a measurement optical system for sharing. A measurement optical system for detecting the optical characteristics of the lens LE and a measurement optical system for detecting lens information different from the optical characteristics may be separately provided.

For example, the measurement optical system 310 includes an illumination light source 311, a collimator lens 312, a half mirror 313, an aperture 314, an imaging lens 315, an imaging element 316, and the like on the surface side of the lens LE. The measurement optical system 310 also includes an index plate 317, a reflecting member 318, and the like on the rear surface side of the lens LE. The illumination light source 311 may be composed of an LED (Light Emitting Diode). The collimator lens 312 makes the measurement light emitted from the illumination light source 311 parallel (substantially parallel) to the optical axis L3. The diaphragm 314 is arranged at the focal position of the imaging lens 315 and has a conjugate positional relationship with the illumination light source 311 . The imaging element 316 may be configured with a CCD (Charge Coupled Device) or a CMOS (Complementary Metal Oxide Semiconductor). The imaging element 316 captures the measurement index image projected onto the lens LE by the index plate 317, the marking points provided on the lens LE, and the like. On the index plate 317, measurement indices for measuring the optical characteristics of the lens LE are formed in a predetermined pattern. For the configuration of the measurement index and the measurement of the optical properties of the lens LE using the measurement index, see Japanese Patent Application Laid-Open No. 2008-241694. The reflecting member 318 reflects the measurement light in the same direction (substantially the same direction) as the incident direction, and illuminates the lens LE from the back side.

For example, the measurement light emitted from the illumination light source 311 diffuses in various directions, passes through the collimator lens 312, is refracted parallel to the optical axis L3, and reaches the reflecting member 318 through the indicator plate 317. . This measurement light is reflected by the reflecting member 318 and the half mirror 313 , is refracted parallel to the optical axis L 4 , and reaches the imaging device 316 via the diaphragm 314 and the imaging lens 315 .

The measurement unit 300 also includes a clamp mechanism 320 that clamps the lens LE transported by the lens transport unit 200 . FIG. 6 is a schematic diagram of clamping mechanism 320 . 6(a) shows the clamping mechanism 320 from above, and FIG. 6(b) shows the clamping mechanism 320 from below. For the sake of convenience, in FIG. 6A, the base plate 321 indicated by the dotted line in FIG. 6B is omitted. The clamp mechanism 320 includes a first clamp pin unit 10, a second clamp pin unit 20, a first ring member 30, a second ring member 40, pulleys 50 (pulleys 50a, 50b, and 50c), pulleys 60 (pulleys 60a, 60b , and 60c), a motor 322, a motor 323, a base plate 321, and the like.

The first clamp pin unit 10 clamps the lens LE from the lateral direction. The first clamp pin unit 10 has a pair of clamp pins, a first clamp pin 10a and a second clamp pin 10b. The first clamp pin 10a and the second clamp pin 10b are arranged equidistantly and oppositely from a clamp center position D1, which is a point of contact when the first clamp pin 10a and the second clamp pin 10b are brought into contact with each other. be. In this embodiment, the angle between the straight line connecting the first clamp pin 10a and the clamp center position D1 and the straight line connecting the second clamp pin 10b and the clamp center position D1 is 180 degrees (approximately 180 degrees). , the first clamp pin 10a and the second clamp pin 10b are arranged. In other words, the midpoint of the straight line connecting the first clamp pin 10a and the second clamp pin 10b is the clamp center position D1.

The second clamp pin unit 20 clamps the lens LE from a side direction different from that of the first clamp pin unit 10 . The second clamp pin unit 20 has a pair of clamp pins, a third clamp pin 20a and a fourth clamp pin 20b. The third clamp pin 20a and the fourth clamp pin 20b are arranged equidistantly and facing each other from the clamp center position D2, which is the point of contact when the third clamp pin 20a and the fourth clamp pin 20b are brought into contact with each other. be. In this embodiment, the angle between the straight line connecting the third clamp pin 20a and the clamp center position D2 and the straight line connecting the fourth clamp pin 20b and the clamp center position D2 is 180 degrees (approximately 180 degrees). , the third clamp pin 20a and the fourth clamp pin 20b are arranged. In other words, the midpoint of the straight line connecting the third clamp pin 20a and the fourth clamp pin 20b is the clamp center position D2.

For example, by arranging the first clamp pin unit 10 and the second clamp pin unit 20 at equal intervals from the clamp center position, the center of the lens is aligned with the clamp center position (see below). When the lens is transported so that the pins are substantially coincident with each other, the distances until each pin moves and touches the side surface of the lens are equal. The moving distance of the first clamp pin 10a and the second clamp pin 10b of the first clamp pin unit 10 is the same whether the lens is circular or elliptical. Further, the moving distances of the third clamp pin 20a and the fourth clamp pin 20b of the second clamp pin unit 20 are the same. Therefore, when the lens is clamped, the lens is stably held.

For example, in this embodiment, the distance from each clamp pin provided in the first clamp pin unit 10 to the clamp center position D1 and the distance from each clamp pin provided in the second clamp pin unit 20 to the clamp center position D2 are set equidistant. Therefore, the clamp center position D1 and the clamp center position D2 are the same position. For example, since each clamp pin unit can move independently of each other (details will be described later), the distance from each clamp pin of the first clamp pin unit 10 to the clamp center position D1, If the distance from each clamp pin to the clamp center position D2 is the same, the elliptical shape can be clamped in the major axis direction and the minor axis direction without considering the direction of the conveyed lens.

The distance from each clamp pin provided in the first clamp pin unit 10 to the clamp center position D1 and the distance from each clamp pin provided in the second clamp pin unit 20 to the clamp center position D2 are set to different distances. may be In this case, the position of each clamp pin with respect to the clamp center position may be changed so that each clamp pin can clamp the lens in the major axis direction and the minor axis direction. Alternatively, a configuration may be provided for changing the orientation of the lens during transportation of the lens.

Further, for example, in this embodiment, the straight line connecting the clamp pins provided in the first clamp pin unit 10 and the straight line connecting the clamp pins provided in the second clamp pin unit 20 are 90 degrees (approximately 90 degrees). That is, the first clamp pin 10a, the second clamp pin 10b, the third clamp pin 20a, and the fourth clamp pin 20b are equally spaced (in other words, etc.) in the circumferential direction on the same circumference around the clamp center position. angle). Therefore, the lens can be uniformly clamped in the major axis direction and the minor axis direction, and the lens can be held more stably.

FIG. 7 is an enlarged view of the second clamp pin 10b. FIG. 7(a) shows a state in which the second clamp pin 10b is in the supporting position. FIG. 7(b) shows a state in which the second clamp pin 10b is at the retracted position. In this embodiment, the configuration of the first clamp pin 10a and the configuration of the second clamp pin 10b are the same, so only the configuration of the second clamp pin 10b will be described. In addition, the structure with which these clamp pins are provided may be partially different.

A second clamp pin 10 b is arranged at the tip of the lens side arm 11 . The rear end of the lens-side arm 11 and the rear end of the spring-side arm 12 are fixed to the connecting shaft 13 passing through the first ring member 30 . A spring hook pin 14 is fixed to the tip of the spring side arm 12 . The spring hooking pin 14 passes through an opening 44 provided in the second ring member 40 (openings provided in a connecting plate 41, a connecting plate 42, and a pressing plate 43, which will be described later). A spring 16 is hooked between the spring hook pin 14 and the spring hook 15 fixed to the rear surface of the first ring member 30 . The spring 16 biases the second clamp pin 10b in the direction of closing (in other words, the direction of supporting the lens LE).

Pulleys 60a, 60b, and 60c are fixed to the base plate 321 (see FIG. 6B). Each pulley rotatably supports the second ring member 40 . A gear 17 meshes with the rotating shaft of the motor 323 , and the gear 17 meshes with the second ring member 40 . For example, when the motor 323 rotates, the gear 17 rotates and the second ring member 40 rotates around the central axis P. Since the second ring member 40 is penetrated by the spring hooking pin 14 , the spring side arm 12 rotates around the central axis S<b>1 of the connecting shaft 13 in conjunction with the rotation of the second ring member 40 . Further, in conjunction with the rotation of the spring side arm 12, the lens side arm 11 rotates about the central axis S1 of the connecting shaft 13. As shown in FIG. In this embodiment, the rotation of the second ring member 40 in the arrow B direction causes the lens side arm 11 to move in the arrow C direction. As a result, the second clamp pin 10b provided in the first clamp pin unit 10 changes from the state shown in FIG. 7(a) to the state shown in FIG. 7(b), and moves from the support position to the retracted position. That is, by rotating only the second ring member 40 without rotating the first ring member 30, the second clamp pin 10b moves from the support position to the retracted position. Although not described in this embodiment, the first clamp pin 10a provided in the first clamp pin unit 10 and the third clamp pin 20a and fourth clamp pin 20b provided in the second clamp pin unit 20 are the same. and move from the support position to the retracted position.

Pulleys 50 a , 50 b , and 50 c are fixed to the base plate 321 . Each pulley rotatably supports the first ring member 30 . A gear 18 meshes with the rotating shaft of the motor 322 , and the gear 18 meshes with the first ring member 30 . For example, when the motor 322 rotates, the gear 18 rotates, and the first ring member 30 rotates around the central axis P. Since the connecting shaft 13 passes through the first ring member 30 , the connecting shaft 13 also rotates around the central axis P in conjunction with the rotation of the first ring member 30 . At this time, the second ring member 40 is rotated around the central axis P integrally with the first ring member 30 so as to maintain the positional relationship between the connecting shaft 13 and the spring hook pin 14 . As a result, the position of the second clamp pin 10b relative to the central axis P is moved. That is, by rotating both the first ring member 30 and the second ring member 40, the position of the second clamp pin 10b with respect to the central axis P is moved. Although not described in this embodiment, the first clamp pin 10a provided in the first clamp pin unit 10 and the third clamp pin 20a and fourth clamp pin 20b provided in the second clamp pin unit 20 are the same. , the position relative to the central axis P moves.

For example, in this embodiment, by rotating the second ring member 40, the first clamp pin 10a and the second clamp pin 10b included in the first clamp pin unit 10 can be moved in conjunction with each other in the opening/closing direction. can. Similarly, the third clamp pin 20a and the fourth clamp pin 20b included in the second clamp pin unit 20 can be moved in conjunction with each other in the opening/closing direction. The opening and closing direction of the clamp pin is the direction in which the clamp pin moves from the support position to the retracted position or from the retracted position to the supported position. Further, for example, in this embodiment, by rotating the second ring member 40, the first clamp pin unit 10 and the second clamp pin unit 20 can be moved independently in the opening/closing direction. The second ring member 40 will be described in detail below.

FIG. 8 is a schematic diagram of the second ring member 40. As shown in FIG. FIG. 8(a) shows the entire second ring member 40. FIG. FIG. 8(b) shows an opening 44 through which the spring pin 14 of the second clamp pin 10b passes. The second ring member 40 is composed of a connecting plate 41, a connecting plate 42, a pressing plate 43, and the like. In this embodiment, a connecting plate 41 is arranged on the upper surface side of the second ring member 40, a holding plate 43 is arranged on the lower surface side of the second ring member 40, and a connecting plate 42 is arranged between the connecting plate 41 and the holding plate 43. be done.

The connecting plate 41 is provided with an opening 45a through which the spring pin of the first clamp pin 10a penetrates and an opening 45b through which the spring pin 14 of the second clamp pin 10b penetrates. The openings 45a and 45b have a width approximately equal to the diameter of the spring pin. Further, the connecting plate 41 is provided with an opening 45c through which the spring pin of the third clamp pin 20a penetrates, and an opening 45d through which the spring pin of the fourth clamp pin 20b penetrates. The openings 45c and 45d have a width greater than the diameter of the spring pin.

The connecting plate 42 is provided with an opening 46a through which the spring pin of the first clamp pin 10a passes and an opening 46b through which the spring pin of the second clamp pin 10b passes. Apertures 46a and 46b have a lateral width greater than the diameter of the spring pin. Further, the connecting plate 42 is provided with an opening 46c through which the spring pin of the third clamp pin 20a penetrates and an opening 46d through which the spring pin of the fourth clamp pin 20b penetrates. The openings 46c and 46d have a width approximately equal to the diameter of the spring pin.

Spring hooks of the first clamp pin 10a and the second clamp pin 10b provided in the first clamp pin unit 10 and the third clamp pin 20a and the fourth clamp pin 20b provided in the second clamp pin unit 20 are attached to the pressing plate 43. An opening 47 is provided through which the pin extends. The opening 47 may have any size as long as it does not hinder the movement of each spring hook pin described later. The pressing plate 43 is provided to prevent the connecting plate 41 and the connecting plate 42 from coming off.

For example, since the spring hooking pins passing through the openings 47a and 47b of the connecting plate 41 move as the connecting plate 41 rotates, the first clamp pin 10a and the second clamp pin 10b move in the opening/closing direction. to move. The spring hooking pins that pass through the openings 47a and 47b of the connecting plate 41 also pass through the openings 46a and 46b of the connecting plate 42, respectively. Even if the first clamp pin 10a and the second clamp pin 10b move, the third clamp pin 20a and the fourth clamp pin 20b do not move.

Similarly, for example, the spring hooking pins passing through the openings 46c and 46d of the connecting plate 42 move as the connecting plate 42 rotates, so that the third clamp pin 20a and the fourth clamp pin 20b move in the opening/closing direction. move in conjunction with The spring hooking pins that pass through the openings 46c and 46d of the connecting plate 42 also pass through the openings 47c and 47d of the connecting plate 41, respectively. Even if the third clamp pin 20a and the fourth clamp pin 20b move, the first clamp pin 10a and the second clamp pin 10b do not move.

For example, since the second ring member 40 is configured as described above, when the motor 323 is driven, the first clamp pin unit 10 and the second clamp pin unit 20 move in conjunction with each other. Even if one of the first clamp pin unit 10 and the second clamp pin unit 20 contacts the lens and stops moving, by continuing to drive the motor 323, the other can move until it contacts the lens. . That is, the first clamp pin unit 10 and the second clamp pin unit 20 can be moved independently in the opening/closing direction. In this embodiment, the first clamp pin unit 10 and the second clamp pin unit 20 are independently moved by one motor (motor 323), but the present invention is not limited to this. For example, by providing a motor for moving the first clamp pin unit 10 and a motor for moving the second clamp pin unit 20, each clamp pin may be moved independently in the opening/closing direction. .

<Lens processing unit>
FIG. 9 is a schematic diagram of the lens processing unit 400. As shown in FIG. The lens chuck shaft consists of an upper chuck shaft 401 and a lower chuck shaft 402 which extend vertically, and can hold and rotate the lens LE to which the processing jig is not attached. The upper chuck shaft 401 is vertically moved by a chuck upper mechanism 404 provided in the center of the sub-base 403 and rotated by a pulse motor 406 attached to a holder 405 . A lens retainer 407 is attached to the lower end of the upper chuck shaft 401 . The lower chuck shaft 402 is rotatably held by a holder 409 fixed to the main base 408 and rotated in synchronization with the upper chuck shaft 401 by a pulse motor 406 .

FIG. 10 is an enlarged view of the lens chuck shaft. An adsorption member 410 having an adsorption portion 410a made of rubber is attached to the upper end of the lower chuck shaft 402 . The adsorption portion 410a is formed in a trumpet shape with a depressed central portion. A suction hole is formed in the central portion of the suction portion 410 a , and a pump unit 412 for sucking and sending air is connected via an air passage 411 formed inside the lower chuck shaft 402 . When the lens conveying unit 200 places the lens LE on the attracting member 410, the upper chuck shaft 401 descends and the pump unit 412 starts sucking. This keeps the lens LE from moving during processing of its periphery. When the lens LE is to be removed, the pump unit 412 stops driving the suction, so that the suction returns to the atmospheric pressure, and the lens LE is released from being held by suction.

The lens LE held by the lens chuck shaft is ground from two directions by the grindstone groups 430 provided in the left and right lens grinding units 420L and 420R. For example, the grindstone group 430 may be a plastic coarse grindstone, a finishing grindstone having a bevel groove, and the like. The lens grinding units 420L and 420R are bilaterally symmetrical, and each moves vertically and horizontally by a moving mechanism provided on the sub-base 403. As shown in FIG. Further, a lens shape measuring unit (not shown) is accommodated in the central depth side of the sub-base 403 . For details of lens shape measurement by the lens shape measuring unit, grinding by the lens grinding unit, etc., see Japanese Patent Application Laid-Open No. 9-253999.

In this embodiment, the lens processing unit 400 grinds the lens LE using the grindstone group 430, but the present invention is not limited to this. For example, the lens processing unit 400 may be provided with a cutting tool or the like, and the lens may be cut by the cutting tool. Also, in this embodiment, the lens processing unit 400 has an example of a configuration in which the lens chuck shaft holds the lens LE by suction, but the present invention is not limited to this. For example, the lens LE may be adhesively held by adhesive resin or the like. Any lens chuck shaft may be used as long as it can hold the lens LE.

<Control system>
FIG. 11 is a block diagram showing the control system of the conveying device. In this embodiment, the tray transport unit 100 is provided with a controller 180, the lens transport unit 200 is provided with a controller 280, the measurement unit 300 is provided with a controller 380, and the lens processing unit 400 is provided with a controller 480, respectively. Each control unit controls driving of a motor or the like included in each unit. Note that each control unit may be realized by a general CPU (processor), ROM, RAM, and the like. Each control unit is connected to a host computer (hereinafter abbreviated as host PC) 600 and an ID tag reader 502, and can communicate wirelessly or by wire. Data regarding the lens LE can be input to the host PC 600 from an input unit (not shown). The host PC 600 also includes a memory 610 as a storage unit. The memory 610 may be a non-transitory storage medium that can retain stored content even when the power supply is interrupted. For example, the memory 610 can be a hard disk drive, flash ROM, removable USB memory, or the like.

<Control operation>
In the conveying apparatus having the above configuration, the lens conveying unit 200 conveys the elliptical lens LE to the measuring unit 300, and the clamping mechanism 320 of the measuring unit 300 clamps the lens.

The operator places a pair of left and right lenses LE on the tray 500 so that the center (substantially the center) of the lens LE coincides with a predetermined position on the tray 500 . Also, the operator inputs lens data such as lens shape data of the lens LE and layout data of the lens LE (for example, the positional relationship between the optical center of the lens LE and the lens shape) to the host PC 600. . The host PC 600 assigns a work number to each input lens data and registers the work number in the ID tag 501 of the tray 500 . Subsequently, the operator sequentially places the trays 500 on the belt conveyor 101 .

The controller 180 of the tray transport unit 100 drives the belt conveyor 101 to transport the tray 500 . Further, the control unit 180 stops driving when the tray 500 reaches the predetermined position Q1. At this time, the work number of the ID tag attached to the tray 500 is read by the ID tag reader 502 and the signal is input to the host PC 600 . The host PC 600 transmits to the lens processing unit 400 data regarding processing of the lens LE corresponding to this work number. Also, the host PC 600 transmits an operation command signal to the lens transport unit 200 .

The control section 280 of the lens transport unit 200 controls driving of each motor to transport the lens LE to the measurement unit 300 . For example, in this embodiment, driving of each motor is controlled such that the center of the lens LE is positioned near the clamping center position of the clamping mechanism 320, and the lens LE is conveyed. The center of the lens LE may be the geometric center of the lens LE or the optical center. In this embodiment, as the center of the lens LE, the case where the geometric center of the lens LE is positioned near the center position of the clamp will be taken as an example.

The control unit 280 moves the X movement base 240 and the Y movement base 250 so that the holding reference axis L1 of the first hand 210 matches (substantially matches) a predetermined position on the tray 500 . As a result, the geometric center of the lens LE is positioned near the holding reference axis L1 within the U-shape formed on the suction base 211 . After that, the control unit 280 lowers the first hand 210 and causes the pump unit 214 to start suctioning, thereby causing the suction piece 212 to suction-hold the lens LE.

Subsequently, the control unit 280 raises the first hand 210 and rotates the holder 238 by 180 degrees, thereby directing the first hand 210 toward the measurement unit 300 side. Also, the control unit 280 moves the X movement base 240 and the Y movement base 250 so that the holding reference axis L1 of the first hand 210 coincides (substantially coincides) with the optical axis L3 of the measurement unit 300 . Further, the control unit 280 lowers the first hand 210 to position the lens LE at a predetermined height (for example, the height of the central portion 5 of each clamp pin shown in FIG. 7, etc.). For example, when the placement of the lens LE is completed in this way, the host PC 600 transmits a measurement start signal to the measurement unit 300 .

The control section 380 of the measurement unit 300 controls driving of each motor to cause the clamp mechanism 320 to clamp the lens LE. FIG. 12 is a top view of the clamping mechanism 320. FIG. Although the lens LE is held by suction by the first hand 210, illustration of the first hand 210 is omitted in FIG. Also, the lens LE is positioned by the controller 280 of the lens transport unit 200 so that the geometric center of the lens LE and the clamp center position D1 (clamp center position D2) match.

The control unit 380 controls the clamp pins of the first clamp pin unit 10 and the second clamp pin unit 20 to clamp near a point on the long axis of the lens LE and near a point on the short axis of the lens LE. Alternatively, the first ring member 30 and the second ring member 40 may be rotated integrally to move the position of each clamp pin with respect to the central axis P. For example, each clamp pin at the retracted position moves toward the clamp center position D1 along the trajectory indicated by the dotted line in FIG. 12 and moves to the support position. Therefore, the control unit 380 may move each clamp pin to a position where the trajectory of each clamp pin touches at least either the vicinity of a point on the long axis or the vicinity of a point on the short axis of the lens LE.

Subsequently, the controller 380 rotates only the second ring member 40 to move each clamp pin from the retracted position to the supported position. In this embodiment, since the elliptical lens LE is sucked and held by the first hand 210, either the first clamp pin unit 10 or the second clamp pin unit 20 comes into contact with the lens LE first. . For example, when the control unit 380 rotates the second ring member 40, the second clamp pin unit 20 (that is, the third clamp pin 20a and the fourth clamp pin 20b) comes into contact with the vicinity of a point on the long axis of the lens LE. , clamp the lens LE. At this time, the first clamp pin unit 10 (that is, the first clamp pin 10a and the second clamp pin 10b) has not yet come into contact with the vicinity of the point on the minor axis of the lens LE, and cannot clamp the lens LE.

For example, the control section 380 continues the rotation of the second ring member 40 even if the second clamp pin unit 20 clamps the lens LE. Since the second clamp pin unit 20 is already in contact with the lens LE, the third clamp pin 20a and the fourth clamp pin 20b stop moving. That is, when the second clamp pin unit 20 comes into contact with the lens LE, the rotation of the connecting plate 42 is stopped. However, the first clamp pin unit 10 continues to move until it clamps the lens LE. That is, the connecting plate 41 rotates until the first clamp pin unit 10 contacts the lens LE. Thereby, after the second clamp pin unit 20 clamps the vicinity of the point on the long axis of the lens LE, the first clamp pin unit 10 clamps the vicinity of the point on the short axis of the lens LE.

For example, in the present embodiment, since the case of clamping the elliptical lens LE was taken as an example, the clamp pin unit located near a point on the long axis of the lens LE comes into contact with the lens LE and stops moving. , a clamp pin unit positioned near a point on the minor axis of the lens LE contacts the lens LE and stops moving. For example, when clamping the circular lens LE, all the clamp pin units come into contact with the lens LE at the same timing and stop moving.

For example, the control unit 380 drives the clamp mechanism 320 in this way, so that the elliptical lens LE is centripetal, and the geometric center of the lens LE and the clamp center position D1 are matched (substantially matched). can. Note that the control unit 380 may determine whether or not the geometric center of the lens LE and the clamp center position D1 match. In this embodiment, since the clamp center position D1 is positioned on the optical axis L3, it may be determined whether or not the center of the lens LE and the optical axis L3 coincide. In this case, the control unit 380 performs image processing on the lens LE image detected by the measurement optical system 310 to calculate the boxing center. The boxing center is the intersection point of straight lines connecting the midpoints of opposite sides of a quadrangle surrounding the lens LE image. For example, for an elliptically shaped lens LE, its center can be considered the boxing center.

The control unit 380 obtains the positional coordinates of the boxing center of the lens LE, and detects the difference from the positional coordinates of the optical axis L3 (known in design). Further, the control unit 380 may determine that the geometric center of the lens LE and the optical axis L3 (that is, the clamp center position D1) do not match when the difference is out of the allowable range. . At this time, the control unit 380 may reversely rotate the second ring member 40 to once release the clamping of the lens LE, and rotate the second ring member 40 again to clamp the lens LE again. Note that the control section 380 may re-clamp at least one of the first clamp pin unit 10 and the second clamp pin unit 20 . When the clamping mechanism 320 clamps the lens LE, the controller 280 of the lens transport unit 200 releases the first hand 210 from sucking the lens LE.

The controller 380 of the measurement unit 300 performs image analysis on the target image detected by the measurement optical system 310 and measures the optical characteristics of the lens LE. Further, the control unit 380 performs image analysis on the index image detected by the measurement optical system 310, and obtains the position coordinates of the optical center of the lens LE. When the positional coordinates of the optical center are obtained, the controller 280 of the lens transport unit 200 adjusts the X movement base so that the holding reference axis L1 of the first hand 210 matches (substantially matches) the optical center of the lens LE. 240 and Y movement base 250 are moved. Subsequently, the control section 280 lowers the first hand 210 to suck the lens LE and conveys the lens LE to the lens processing unit 400 . For example, the controller 280 controls the X movement base 240 , the Y movement base 250 and the holder 238 to place the lens LE on the adsorption member 410 of the lens processing unit 400 .

The controller 280 of the lens transport unit 200 releases the suction of the lens LE by the first hand 210 . The first hand 210 that has released the suction of the lens LE leaves the lens processing unit 400 . The controller 480 of the lens processing unit 400 causes the suction member 410 to suck the rear surface side of the lens LE by driving the pump unit 412 for suction, and lowers the upper chuck shaft 401 . As a result, the lens LE is held (chucked) by the chuck shaft with its optical center aligned with the center of the chuck shaft. When the chucking of the lens LE is completed, the host PC 600 outputs lens data and the like input by the operator to the lens processing unit 400 to start processing.

After finishing processing the lens LE, the lens processing unit 400 transmits a processing end signal to the host PC 600 . When the host PC 600 receives the processing end signal, the host PC 600 controls the lens transport unit 200 again. The controller 280 of the lens transport unit 200 turns the second hand 220 toward the lens processing unit 400 side. Further, after the upper chuck shaft 401 of the lens processing unit 400 is lifted, the control unit 280 keeps the second hand 220 until the holding reference axis L2 of the second hand 220 coincides (substantially coincides) with the rotation axis L5 of the chuck shaft. 220 is moved. Furthermore, after the suction of the lower chuck shaft 402 of the lens processing unit 400 is released, the control section 280 causes the suction piece 222 of the second hand 220 to suction and hold the lens LE. For example, the processed lens LE is transported by the second hand 220 and returned to the tray 500 again.

Incidentally, when processing of one of the pair of left and right lenses LE is completed, the other lens is also conveyed in the same procedure and processed automatically. Thereafter, the transportation and processing of the lenses placed on each tray 500 are automatically repeated.

As described above, for example, the conveying device according to the present embodiment includes a first clamp pin unit having a pair of clamp pins for clamping the spectacle lens from the lateral direction, and clamping the spectacle lens to a side different from the first clamp pin unit. a clamp pin unit including at least a second clamp pin unit having a pair of clamp pins clamped from one direction, and the first clamp pin unit and the second clamp pin unit move independently of each other in the opening and closing direction. Let As a result, for example, even if the spectacle lens has an elliptical shape, the clamp pin provided in each clamp pin unit can contact the side surface of the spectacle lens from both the major axis direction and the minor axis direction of the spectacle lens. Become. Therefore, the spectacle lens can be held stably.

Further, for example, in the conveying device of the present embodiment, the pair of clamp pins of the first clamp pin unit are arranged at equal distances from the center position of the clamp and face each other, and the pair of clamp pins of the second clamp pin unit are arranged to face each other. Clamp pins are positioned equidistantly and oppositely from the clamp center location. For example, if the spectacle lens has an elliptical shape, the distances from the center of the spectacle lens to two points on the side surface of the spectacle lens located on a straight line passing through the center of the spectacle lens are equal. When the vicinity of the center of the spectacle lens is aligned with the center position of the clamp, the first pin and the second pin are arranged to face each other at an equal distance from the center position of the clamp. can be made equal. Similarly, by arranging the third pin and the fourth pin to face each other at the same distance from the center position of the clamp, the distances until each pin contacts the side surface of the spectacle lens can be the same. Therefore, the spectacle lens can be stably held and the spectacle lens can be easily centered.

Further, for example, in the conveying device of this embodiment, the distance from the first and second pins to the clamp center position and the distance from the third and fourth pins to the clamp center position are the same. When the distance from the first pin and the second pin to the center position of the clamp is different from the distance from the third pin and the fourth pin to the center position of the clamp, the spectacle lens is clamped by each pin. In this case, it is necessary to consider the long axis direction and the short axis direction of the spectacle lens. However, by making the distance from the first and second pins to the center position of the clamp equal to the distance from the third and fourth pins to the center position of the clamp, regardless of the orientation of the spectacle lens, Since the spectacle lens can be housed in each pin, the spectacle lens can be easily clamped. Also, the spectacle lens is more likely to be centered.

Further, for example, in the conveying device of this embodiment, the first and second pins of the first clamp pin unit and the third and fourth pins of the second clamp pin unit are centered around the clamp center position. They are arranged at regular intervals in the circumferential direction on the same circle. If the first pin, the second pin, the third pin, and the fourth pin are not equally spaced, there will be a direction in which the spectacle lens is strongly clamped and a direction in which the spectacle lens is weakly clamped. By arranging them, the spectacle lenses can be held evenly, and the spectacle lenses can be held more stably.

Also, for example, the conveying device in this embodiment controls the position of the spectacle lens so that the center of the spectacle lens is positioned near the center position of the clamp. For example, by using each clamp unit to clamp the spectacle lens whose position is controlled in advance in this way, adjustment when centripetal the spectacle lens is facilitated.

Also, for example, the conveying device in this embodiment determines whether or not the center of the spectacle lens and the clamp center position match, and based on the determination result, clamps the spectacle lens again with the clamp pin unit. For example, when the spectacle lens is clamped, even if the center of the spectacle lens and the clamping center position of the clamp pin do not match, by providing such a configuration, it is possible to accurately center the spectacle lens. .

<transformation example>
In this embodiment, the clamping mechanism 320 included in the measurement unit 300 has been described as having two clamp pin units, the first clamp pin unit 10 and the second clamp pin unit 20. However, the present invention is not limited to this. . The clamping mechanism 320 may be configured with at least two clamping pin units. That is, in addition to the first clamp pin unit 10 and the second clamp pin unit 20, a third clamp pin unit, a fourth clamp pin unit, etc. may be provided. In this case, third moving means for interlockingly moving the third clamp pin unit in the opening/closing direction, fourth moving means for interlockingly moving the fourth clamp pin unit in the opening/closing direction, etc. are provided, and each clamp is The pin units may be driven independently of each other. In this case, the clamp pins provided in each clamp pin unit may be arranged at equal intervals (at equal angles) in the circumferential direction on the same circumference around the clamp center position. That is, each clamp pin may be arranged at an angle of 60 degrees if three pairs of clamp pin units are provided, and each clamp pin may be arranged at an angle of 45 degrees if four pairs of clamp pin units are provided.

In this embodiment, the configuration in which each clamp pin is moved from the retracted position to the supported position by rotating only the second ring member 40 of the clamp mechanism 320 has been described as an example, but the present invention is not limited to this. For example, each clamp pin may be moved from the retracted position to the supported position by rotating only the first ring member 30 . In this case, since the rotation direction of each clamp pin about the central axis S1 is opposite to that of this embodiment, the spring 16 may be biased in the direction in which each clamp pin opens.

In this embodiment, each clamp pin provided in the first clamp pin unit 10 is arranged at an equal distance from the center position of the clamp and opposed to each other, and each clamp pin provided in the second clamp pin unit 20 is arranged at a distance from the center position of the clamp. Although the configuration in which they are arranged equidistantly and facing each other has been described as an example, it is not limited to this. For example, either one of the first clamp pin unit 10 and the second clamp pin unit 20 does not have to be arranged so that each clamp pin is equidistant from the clamp center position and facing each other. That is, each clamp pin provided in one of the clamp pin units may be arranged so as to face each other at different distances from the center position of the clamp. They may be arranged equidistantly and non-oppositely from the clamp center position. They may be arranged at different distances and non-opposed from each other from the clamp center position. Even with such a configuration, the clamping mechanism 320 can clamp the lens LE.

In this embodiment, the clamping mechanism 320 clamps the elliptical lens LE. However, the configuration is not limited to this. The clamping mechanism 320 in this embodiment can clamp the lens LE having a point-symmetrical shape (including, for example, a circular shape, an elliptical shape, etc.) by having the above configuration.

In this embodiment, the clamping mechanism 320 provided clamps the lens LE sucked and held by the first hand 210, but the configuration is not limited to this. For example, the clamping mechanism 320 may be configured to include a lens support for mounting the lens LE, and clamp the lens LE mounted on the lens support. As an example of the lens supporting portion, a protective cover (for example, a transparent acrylic plate, etc.) may be provided on the upper portion of the first ring member 30 . For example, the lens LE sucked and held by the first hand 210 is placed on the protective cover by releasing the suction and holding on the protective cover. The clamping mechanism 320 may center the lens LE by clamping the lens LE resting on the protective cover in this manner. That is, the measurement unit 300 and the center of the lens LE (for example, the geometric center) may be aligned.

In this embodiment, after measuring the optical characteristics of the lens LE using the measurement unit 300, the optical center of the lens LE and the rotation axis L5 of the lens chuck shaft provided in the lens processing unit 400 are aligned. , the lens conveying unit 200 conveys the lens LE to hold the lens LE on the lens chuck shaft, but the present invention is not limited to this. For example, a configuration may be adopted in which the lens LE is conveyed with a cup attached thereto, and the cup is held by the lens chuck shaft. In this case, the measuring unit 300 is provided with a cup attachment portion for attaching the cup to the lens LE, and the lens processing unit 400 is provided with a cup holder for attaching the cup to the lens chuck shaft. As a result, the lens transport unit 200 transports the lens LE with the cup attached, and attaches the cup to the cup holder, thereby holding the lens LE on the lens chuck shaft.

10 First clamp pin unit 20 Second clamp pin unit 30 First ring member 40 Second ring member 100 Tray transport unit 200 Lens transport unit 300 Measurement unit 320 Clamp mechanism 400 Lens processing unit 600 Host computer

Claims (5)

A transport device for transporting spectacle lenses,
A first clamp pin unit having a pair of clamp pins consisting of a first pin and a second pin for clamping the spectacle lens from a side direction, and a clamp pin unit for clamping the spectacle lens from a side direction different from that of the first clamp pin unit. a second clamp pin unit having a pair of clamp pins consisting of a third pin and a fourth pin;
A first clamping pin unit for moving the first pin and the second pin in the opening/closing direction so that the first pin and the second pin maintain an equal distance from the first clamp center position of the first clamp pin unit. means of transportation;
A second clamp for moving the third pin and the fourth pin in the opening/closing direction so that the third pin and the fourth pin maintain an equal distance from the second clamp center position of the second clamp pin unit. means of transportation;
with
The first pin and the second pin are arranged to face each other from the first clamp center position, and the third pin and the fourth pin are arranged to face each other from the second clamp center position,
The first clamp center position and the second clamp center position are the same position,
With the vicinity of the center of the spectacle lens aligned with the first clamp center position and the second clamp center position, the first moving means and the second moving means are driven independently of each other , and the spectacle lens is and moving the first clamp pin unit and the second clamp pin unit until they come into contact with each other, thereby clamping the eyeglass lens between the clamp pin units.
The conveying apparatus of claim 1,
At the retracted position of the first clamp pin unit and the second clamp pin unit, a first distance from the first pin and the second pin to the first clamp center position, the third pin and the third pin. The conveying device, wherein the second distance from the 4-pin to the center position of the second clamp is the same distance.
In the conveying device according to claim 1 or 2,
The first pin and the second pin, and the third pin and the fourth pin are arranged at equal intervals in the circumferential direction on the same circumference around the center position of the first clamp and the center position of the second clamp. A conveying device characterized by:
In the transport device according to any one of claims 1 to 3,
A control means for controlling the position of the spectacle lens with respect to the clamp pin unit,
The control means controls the position of the spectacle lens so that the vicinity of the center of the spectacle lens is positioned at the first clamp center position and the second clamp center position,
The conveying device, wherein the clamp pin unit clamps the spectacle lens positioned by the control means by the first moving means and the second moving means.
The conveying apparatus of claim 1,
At the retracted position of the first clamp pin unit and the second clamp pin unit, a first distance from the first pin and the second pin to the first clamp center position, the third pin and the third pin. The second distance from the 4-pin to the second clamp center position is a different distance,
the second distance is longer than the first distance,
A control means for controlling the position of the spectacle lens with respect to the clamp pin unit,
The control means controls the position of the spectacle lens so that the minor axis direction of the spectacle lens is positioned in the direction of the first distance and the major axis direction of the spectacle lens is positioned in the direction of the second distance,
The conveying device, wherein the clamp pin unit clamps the spectacle lens positioned by the control means by the first moving means and the second moving means.

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