JP4081104B2 - Lens layout block device and spectacle lens processing method - Google Patents

Description

The present invention relates to a method of processing a lens for layout block apparatus and the spectacle lens.

   There are various types of spectacle lenses (hereinafter also simply referred to as “lenses”) such as single focus lenses, multifocal lenses, progressive multifocal lenses, etc., and the diameter, outer diameter, lens power, etc. are different for each lens type. It is necessary to make the lens.

  Conventionally, such edge trimming of lenses has been performed according to the following procedure. For example, in the case of processing a single focus lens, first, when a prescription lens is determined first, in the case of a normal prescription, a prescription lens is selected from a stock lens (a mass-produced product in stock) and is not in the stock lens. In the case of lenses (custom products that are not in stock), they are manufactured according to orders at the factory.

  The stock lens has a predetermined lens curvature (curve) on the front surface (convex lens surface) and back surface (concave lens surface) based on the optical design so as to achieve a predetermined lens power. The process is performed up to the final process up to the surface treatment such as prevention coating.

  On the other hand, in the case of a custom-made product, the lens material is prepared in the state of a semi-finished product (semi-lens) in advance. It is used.

  When the prescription lens is manufactured, the lens is horizontally stored in the lens storage tray with the concave lens surface facing down together with the processing instruction sheet, and conveyed to the edging processing line. Then, the operator takes out the prescription lens from the tray, and places it on an inspection table of a predetermined inspection device such as a lens meter to check the lens power, the astigmatic axis, etc. of the prescription lens, and this lens information and lens frame shape data and From the prescription data of the wearer, the processing center and the mounting angle of the processing jig (lens holder) with respect to the lens are determined (optical layout).

  Next, based on this, the lens holder is attached to the processing center of the lens (block). Then, the lens holder is mounted on the edging apparatus together with the lens, and the lens is edged with a grindstone or a cutter to obtain a shape that matches the frame shape of the spectacle frame.

  By the way, conventionally, an optical layout and a block of a lens, which is a pre-process for lens edge trimming, are manually performed by an operator using a dedicated device. However, such work is inefficient and has low productivity, which has been a major obstacle to labor saving. In addition, it is necessary to pay close attention to handling the lens so that it is not soiled, damaged, or damaged, so that the burden on the operator is great, and the lens holding surface matches the curvature of the prescription lens. When the lens holder is selected, there is a problem that an error such as an operator selecting a different type of lens holder is likely to occur. In addition, when the operator sticks the elastic seal to the lens holder, there is a problem that sticking failure occurs because the pressing force varies.

For this reason, devices for single focus lenses, progressive multifocal lenses, and multifocal lenses that have recently improved the working efficiency by automatically performing lens optical layout and lens blocking by a lens holder ( ABS; Auto Blocker for Single Vision Lens,
Development of ABM (Auto Blocker for Multi-focus Lens) is required. Hereinafter, such a device is referred to as a layout block device.

  Further, as lens holders used for edge-stripping processing of spectacle lenses, for example, those disclosed in Japanese Utility Model Laid-Open No. 6-024852 and Japanese Patent Laid-Open No. 9-225798 are known. This lens holder is usually formed of a cylindrical body and has a concave spherical lens holding surface on the tip surface. When holding the lens, a thin elastic seal is attached to the lens holding surface in advance. Adhere the elastic seal against the convex lens surface of the lens. On the lens holding surface, in order to increase the tight coupling force with the elastic seal and prevent the elastic seal from rotating, a large number of minute protrusions having a triangular cross-sectional shape are formed radially over the entire circumference.

  When a lens is mounted on a conventionally known lens holder, the lens is mounted on an edging apparatus together with the lens holder, and the outer peripheral surface of the lens is edged with a grindstone or a cutter to match the frame shape of the spectacle frame. Shape.

  In the case of edge trimming, a lens holder holding a lens is attached to one of two coaxially arranged clamp shafts, and both surfaces of the lens are held between the lens holder and the other clamp shaft. Then, the two clamp shafts are rotated in the same direction, and at the same time, the movement is controlled in the direction perpendicular to the axis line based on the lens frame shape data, and the edge is processed with a grindstone or a cutter.

  The type of lens is infinite due to the combination of a convex curve and a concave curve for one lens power D (diopter), but is actually determined in consideration of optical aberration and inventory management. Specifically, by adopting a lens design in which the type of convex curve is reduced and the concave curve is different, for example, in a progressive multifocal lens, about 8 types of 2 to 9 curves are prepared. In general, since the corresponding frequency range is wide, for example, 12 types from 0 curve to 11 curve may be prepared.

  The lens power D is expressed by the difference in curvature between the convex curve D1 and the concave carp D2. In the case of a semi-finished lens such as a single focus lens or a progressive multifocal lens, the lens power is classified only by the convex curve D1. ing. For example, in the case of a single focus lens having a convex lens power D of 4, it is called a 4-curve lens, and its radius of curvature is determined by D = (N−1) × 1000 / R (mm). In this case, N is the refractive index of the lens, and is 1.50 in the case of diethylene glycol bisallyl carbonate, which is the most versatile plastic lens material. R is the radius of curvature of the convex lens surface. Therefore, in the case of 4 curves, when substituting into the above equation, R = 125 mm from 4 = (1.5−1) × 1000 / R. Similarly, in the case of 7 curves, when converted to the radius of curvature, it is about 71 mm, and in the case of 11 curves, it is about 45 mm.

  Conventionally, as a lens holder, for a stable holding, an individual lens having a different lens power is used for each power, or two types for a shallow curve and a deep curve are used. However, when preparing several types of lens holders with different curvatures of the lens holding surface and trying to select and use them according to the curvature of the convex lens surface of the lens to be held, there are many types of holders themselves, and their maintenance and management Problems arise.

  On the other hand, the two types of holders for shallow curves and deep curves use flexible holders (for example, plastic) as the material of the holder itself, but there are problems with its durability and accuracy. there were.

  In addition, since the lens holders must be manufactured to have the same size regardless of the curvature of the lens holding surface, conventionally, the type of holder is identified by an identification symbol or a number displayed on the outer periphery of the lens holder by a stamp or the like. It was. However, in that case, there is a problem that the work is troublesome because the operator must display the identification symbol or the number by engraving or the like. In addition, the operator must not only pick up and check the lens holder, but if the identification symbol or number becomes unclear due to dirt, wear, imprinting failure, etc. on the surface of the holder itself, it is difficult for the operator to read it. It is necessary to pay careful attention to handling. In particular, when applied to the above-described layout block device, it is required that the operator and the sensor can easily and reliably identify the type of the lens holder.

  In any case, in the layout blocking process before the conventional edge trimming of the lens, it is necessary to go through various work processes of the operator, and such work should be performed in a limited space. It was required and work efficiency was very bad.

SUMMARY OF THE INVENTION An object of the present invention is to provide a lens layout block device that solves the above-described conventional problems and meets the demands.
That is, the present invention provides a lens for blocking the raw lens on a lens holder that is mounted on a mounting portion of an edging apparatus that processes the raw spectacle lens into a lens frame shape of a predetermined spectacle frame. a use layout block unit, and attaching a resilient seal to the lens holder, and the elastic seal comprising a holder holding unit for blocking the ophthalmic lens on the lens holder is adhered is the holder holding device A rotating arm that is pivotably attached to a vertical rotating shaft, a clamp device that is pivotably attached to the rotating arm, and a holder that is mounted on the clamp by rotating the rotating arm. Arm drive device that sequentially moves to a position, a sticking position and a lens holding position, and a clamp drive device that moves the clamp device up and down And an arm fixing device that fixes the pivot arm to the pivot position when the clamp device moves to the lens holding position, and the clamp device includes a cylindrical main body to which the lens holder is fitted, A holder fixing mechanism for fixing the lens holder to the cylindrical main body, the holder fixing mechanism including a rotatable holder fixing member and a spring for biasing the holder fixing member in a direction away from the lens holder. And a driving device that presses the holder fixing member against the lens holder against the spring, and the clamping device moves to the holder mounting position by the rotation of the rotating arm, thereby the cylindrical body. Holding the lens holder and moving the sticker to the sticking position to stick the elastic seal to the lens holder; It is to block the unprocessed lens to the elastic seal by moving the lifting position.

Furthermore, the present invention provides a spectacle lens processing method for processing an unprocessed spectacle lens into a lens frame shape of a predetermined spectacle frame by using a lens edging apparatus, in the mounting portion of the edging apparatus. The step of blocking the unprocessed spectacle lens on the lens holder to be mounted is performed using the lens layout block device according to claim 1, and the rim processing device rims the blocked lens. To be processed.

According to the present invention, the rotation arm, the clamp device attached to the rotation arm so as to be movable up and down, and the clamp driving device for moving the clamp device up and down are provided. Since the elastic seal sticking and lens holding of the lens holder can be performed sequentially, the step of holding the lens holder, the step of sticking the elastic seal to the lens holder, and the series of steps of holding the lens by the elastic seal Can be done automatically. Therefore, the burden on the worker is remarkably reduced, and the work efficiency and productivity can be improved and labor can be saved. In addition, since the operator does not hold the lens during the above process, there is no possibility that the lens becomes dirty or damaged.

Hereinafter, an apparatus for attaching a lens to a lens holder according to the present invention will be described in detail based on an embodiment shown in the drawings.
1A and 1B are a front view and a rear view of a lens holder used in an apparatus for attaching a lens to a lens holder according to the present invention, and FIG. 2 is a state in which the lens is held by an elastic seal on the lens holder. 3A, 3B, and 3C are an enlarged sectional view taken along line III-III in FIG. 1, a diagram showing a lens holding surface, and an enlarged sectional view of the lens holding surface.

  In these drawings, reference numeral 1 denotes a plastic single-focus lens for eyeglasses (hereinafter simply referred to as a lens), which has a convex lens surface 1a and a concave lens surface 1b, and the outer peripheral surface is formed into a lens frame shape by an edging device. Edge trimming is performed to match.

  In the case of a single focus lens, the lens 1 generally has a wide corresponding frequency range as described above. For example, twelve types from 0 curve to 11 curve are prepared, but the lens holder 2 is shared. Therefore, the lens is classified into a plurality of lens groups each having an approximate curve, for example, a first lens group having 0 to 3 curves, a second lens group having 4 to 6 curves, and a third lens group having 7 to 11 curves. ing. An elastic seal 3 is attached to the lens holder 2, and the convex lens surface 1 a of the lens 1 is held by the lens holder 2 through the elastic seal 3.

The lens holder 2 is formed integrally with the fitting shaft portion 4 and the outer periphery of the fitting shaft portion 4 at the distal end portion and the distal end portion by being formed into a cylindrical body with a flange using a metal such as stainless steel. A flange 5 and a lens holding part 6 are provided. The fitting shaft portion 4 has, for example, a length of 35 mm, an outer diameter of about 14 mmφ, and a hole diameter of the center hole 7 of about 10 mmφ.

  The flange 5 defines a fitting amount of the fitting shaft portion 4 to a clamp shaft described later, and has a thickness of about 5 mm and an outer diameter of about 20 mmφ. In addition, a notch groove 8 is formed on the peripheral surface of the flange 5 as a rotation preventing portion for preventing the lens holder 2 from rotating with respect to the clamp shaft. A taper surface 8a that opens outward is formed in the open portion of the notch groove 8 opposite to the lens holding portion 6 side in order to facilitate fitting to the clamp shaft.

  The lens holding portion 6 is provided on the outer periphery on the distal end side of the fitting shaft portion 4 and has a thickness and an outer diameter substantially equal to those of the flange 5, and an interval of about 5 mm is set between the lens holding portion 6 and the flange 5. The surface of the lens holding portion 6 to which the elastic seal 3 is in close contact forms a concave spherical lens holding surface 9 corresponding to the convex lens surface 1 a of the lens 1. If the radius of curvature of the lens holding surface 9 is larger than the radius of curvature of the convex lens surface 1a, only the center portion of the lens holding surface 9 is in contact with the convex lens surface 1a and the outer peripheral portion is not in contact, which is unstable. On the other hand, if it is small, only the outer peripheral portion of the lens holding surface 9 comes into contact with the convex lens surface 1a and the central portion is not in contact, so that stable holding is achieved, and an axial deviation or the like can be prevented.

  Therefore, in the present embodiment, lens holders 2 having different curvature radii of the lens holding surface 9 are prepared for each lens group, and those used for the first lens group having the 0 to 3 curves described above are 4 curves and 4 to 4 curves. Those used for the second lens group having 6 curves are set to 7 curves, and those used for the third lens group having 7 to 11 curves are set to 11 curves. That is, the lens holder 2 has a number of types (three types) corresponding to the number of lens groups, and has a lens holding surface 9 having a smaller radius of curvature than the convex lens surface 1a of the lens 1 belonging to each lens group ( However, the lens with the 11 curve is a lens holder with the same curve), and the lens 1 is made to come into contact with the convex lens surface 1a. As described above, when the curvature of the lens holding surface 9 of the lens holder 2 is made deeper than the convex lens surface 1a of the lens 1 for each lens group, the lens holding surface 9 is mainly held at the outer peripheral edge as shown in FIG. can do. However, only the curvature of the lens holding surface 9 is different, and the other structure of the lens holder 2 is exactly the same. In addition, since the adhesion degree of these both surfaces will become low if the difference of the curvature radius of the convex side lens surface 1a and the lens holding surface 9 is large, it is desirable that the difference is small.

  In addition, a large number of minute protrusions 10 are formed radially on the entire circumference of the lens holding surface 9 in order to increase the tight coupling force with the elastic seal 3. The projecting body 10 is formed in an isosceles triangle cross-section, so that the wall surface 10b on the rotation direction side of the lens holder 2 and the wall surface 10c on the opposite side of the lens holder 2 have the same inclination angle (for example, 45 °). In this way, when the same angle is set, the elastic seal 3 is in close contact with both slopes, and by increasing the contact area, appropriate flexibility and deformability of the sheet are utilized to increase the lens holding force. be able to. In addition, since the elastic seal 3 is in pressure contact with both inclined surfaces having the same inclination angle, the unbalanced rotational force is canceled and is not generated, and the elastic seal 3 is not rotated and the holding accuracy of the lens is not lowered. .

  On the peripheral surfaces of the flange 5 and the lens holding portion 6, a rotation preventing portion 11 that engages with an engaging portion of a holder storing cassette 31 that stores the lens holder 2, which will be described later, is formed. The rotation prevention unit 11 is a groove formed by cutting a part of the peripheral surface of the flange 5 and the lens holding unit 6 from a direction orthogonal to the axis, and is 180 ° so as to be back-to-back with the rotation prevention unit 8. They are formed with different phases.

  Further, a member 13 for identifying the type of the lens holder 2 is fitted into the base end side of the fitting shaft portion 4 inside the lens holder 2 by press fitting, and one end surface thereof is a base end surface of the lens holder 2. And substantially the same plane. This member 13 is formed in a cylindrical body colored in a required color with a synthetic resin. The color of the member 13 is colored, for example, in the case of a 4-curve holder, in red in the case of a 7-curve holder, and in blue in the case of an 11-curve holder. Therefore, by looking at the color of the member 13, it is possible to identify at a glance whether the lens holder 2 has a 4-curve, 7-curve or 11-curve.

  The elastic seal 3 is made of a thin rubber having a thickness of about 0.5 to 0.6 mm, and has an outer diameter larger than the outer diameter of the lens holding surface 9 (about 22 mmφ) and an inner diameter smaller than the hole diameter of the lens holder 2 ( (About 8 mm) formed in a ring shape and coated with an adhesive on both sides.

Next, the supply of the lens holder, the elastic seal with respect to the holder, the supply of the lens, and the edge trimming of the lens will be schematically described with reference to FIGS.
4 is a front view of the ABS device for a single-focus lens, FIG. 5 is a plan view of the same device, and FIGS. FIG. 7 is a cross-sectional view of the central portion of the cassette away from the pin position, FIG. 8 is a view showing the transfer portion of the lens holder, and FIG. 9 is a view of the lens. FIG. 10 is a view showing a state in which the beveling is performed, and FIG. 10 is a view taken in the direction of arrow V in FIG.

  4 to 6, the ABS device 20 is installed adjacent to an edge-grinding device (not shown), and includes a holder transport device 22 provided on a base 21, a holder holding device 23, a seal A batch method is adopted in which a supply device 24, a lens holding device 25, a lens measurement device 26, and the like are provided, and 12 types (0 to 11 curves) of single focus lenses having different convex curves are sequentially processed in a random manner.

  The holder conveying device 22 is for supplying three types of lens holders 2 of 4 curve, 7 curve, and 11 curve to the holder holding device 23, and includes a holder supply mechanism 28 and a holder support mechanism 29.

  The holder supply mechanism 28 has three chutes arranged in parallel in the width direction at an angle (for example, 20 °) at which the lens holder 2 can slide by its own weight in the supply direction of the lens holder 2 (in the direction of arrow 27 in FIG. 5). 30, and three holder storing cassettes 31 storing the required number (for example, 42) of lens holders 2 for each type are detachable at the same angle as the chute 30 on the upstream side of these chutes 30. is set up.

  In FIG. 6, the cassette 31 is formed in an elongated rectangular hollow body whose both ends are opened by metal, synthetic resin, etc., so that the lens holders 2 are aligned in a line and the direction of the rotation prevention unit 11 is made uniform. An opening 33 is formed over the entire length of the upper plate 32, and the base end side of the opening 5 protrudes above the cassette 31 from the flange 5 of the lens holder 2. Therefore, the member 13 can be seen from above the cassette 31, and when different types of lens holders 2 are mixed and stored in the cassette 31, it can be confirmed at a glance. Further, it is possible to prevent a mounting error of the cassette 31. That is, since the cassette 31 itself is also identified by the color of the member 13, it is possible to prevent a mistake that a certain cassette is installed on a chute other than the chute to be originally installed, or on a plurality of chutes.

  The width of the opening 33 is set to be slightly larger than the outer diameter of the fitting shaft portion 4 of the lens holder 2, and the lower surface of the flange 5 is slidably supported by the opening 33. The upper plate 32 is formed in a stepped manner so that one plate portion 32a is higher than the other plate portion 32b by the thickness of the cassette 31 with the opening 33 interposed therebetween. An edge portion 32a1 of one plate portion 32a is inserted into the rotation preventing portion 11 of the lens holder 2, and an inverted L-shaped bracket 34 is also inserted into the rotation preventing portion 11 on the lower surface side of the plate portion 32a. These are fixed, thereby aligning the direction of the lens holder 2 to prevent free rotation.

  A pair of drop-off prevention pins 35 for preventing the lens holder 2 from dropping off are disposed in the cassette 31 and in the vicinity of the downstream opening so as to be movable in the left-right direction. These pins 35 are connected to each other by a tension coil spring 36 at their lower ends and are biased toward each other, so that they normally contact the lens holding portion 6 to prevent the lens holder 2 from falling off. When the cassette 31 is mounted on the chute 30, the lens holder 2 is configured to move away from the tension coil spring 36 and release from the lens holder 2. The pin 35 is moved in the separation direction by an appropriate member 37 provided on the chute 30 side as shown in FIG.

FIG. 7 is a cross-sectional view of the central portion of the cassette away from the pin position, and is different in that the pair of drop prevention pins 35 shown in FIG. 6 are not provided.
When the lens holder 2 in the cassette 31 slides on the cassette 31 and the chute 30 by its own weight and is sequentially ejected one by one by the shutter mechanism 38, it is supported by the holder support mechanism 29 shown in FIGS.

  4 and 8, the shutter mechanism 38 normally closes the discharge port 30a of the chute 30 so as to lock the first lens holder 2A, and moves the stopper pins 39 up and down. The lens holder 2 is discharged from the chute 30 by driving the air cylinder 40 with a supply signal from a control unit (not shown). That is, when the stopper pin 39 is lowered by driving the air cylinder 40 and retracts from the passage of the chute 30, the first lens holder 2 </ b> A is released from the stopper pin 39, so that it comes out of the discharge port 30 a of the chute 30 by its own weight. To move onto the terminal end 30b. The end portion 30b is set to have a small inclination angle in order to slow down the sliding speed of the lens holder 2 and reduce the impact when it hits a stopper 47 (to be described later) of the holder support mechanism 29. When the first lens holder 2A passes, the stopper pin 39 rises and returns to the original state again. Therefore, when the second lens holder 2B slides on the chute 30 to the position of the stopper pin 39, the second lens holder 2B is locked by the stopper pin 39 and becomes a new first lens holder. Then, by repeating such an operation, the lens holders 2 are automatically supplied one by one. The chute 30 is also formed substantially the same as the cassette 31 and is fixed on the base 21.

  Further, sensors 41 (FIG. 4) for detecting the presence or absence of the lens holder 2 are attached to the downstream side and the middle part of the chute 30. The sensor 41 on the upstream side is turned on when nine lens holders 2 remain in the chute 30 and is for urging replenishment. The sensor 41 on the downstream side is turned on when the lens holder 2 remains in the chute 30 and stops the apparatus.

  5, 8, and 11, the holder support mechanism 29 is disposed on the base 21 so as to face the terminal end of the chute 30, and the front and rear direction of the ABS device 20 (see FIG. 5). A stage 43 is provided that is movable in the direction of arrow Y) and reciprocates between the terminal positions A1, A2, A3 of each chute 30 and the holder mounting position A4. The stage 43 is movably held by a pair of left and right rails 44 and a ball screw 45 installed on the base 21. When the ball screw 45 is rotated by driving of the drive motor 46, the rail 44 and the ball screw are moved. It is comprised so that it may move along 45. The terminal portions 30b of the chutes 30 are positioned at the terminal positions A1, A2, A3 of the chutes 30.

  Further, on the upper surface of the stage 43, a stopper 47 for receiving the lens holder 2 supplied to the terminal portion 30b of the chute 30, a pair of holder hands 48A and 48B for supporting the lens holder 2, and these holder hands 48A , 48B are operated in synchronism with the direction of approaching and separating from each other. One holder hand 48A is formed of a rod-like body having a circular cross-sectional shape, and holds the rotation preventing portion 11 of the lens holder 2 on the peripheral surface of the tip portion. The other holder hand 48B is formed of a rod-shaped body having a rectangular cross-sectional shape, and a V-shaped concave portion 50 is formed on a side surface facing the lens holder 2 at the tip, and the concave portion 50 prevents the lens holder 2 from rotating. The outer peripheral surface of the flange 5 and the lens holding part 6 is held on the side opposite to the part 11.

  The stage 43 is moved in advance to the end position of the chute to which the lens holder 2 is to be supplied, for example, the A1 position among the three chutes 30 when the lens holder 2 is supplied, and waits in a state where the holder hands 48A and 48B are opened. When the lens holder 2 is supplied onto the end portion 30b of the chute 30, the stopper 47 receives the lens holder 2, and the pair of holder hands 48A and 48B are closed to sandwich the lens holder 2. (FIG. 13). Thereafter, the held lens holder 2 is transported to the holder mounting position A4, and the lens holder 2 is centered.

  In FIG. 14, a centering mechanism 153 for centering the lens holder 2 supported by the holder hands 48A and 48B is disposed at the holder mounting position A4. The centering mechanism 153 includes an elevating table 154 and an air cylinder 155 that elevates the elevating table 154. On the upper surface of the elevating table 154, a relatively shallow concave portion 56 having a hole diameter slightly larger than the outer diameter of the lens holding portion 6 of the lens holder 2 is formed. In addition, a circular convex portion 157 is provided at the center of the concave portion 156, and the outer diameter thereof is set slightly smaller than the center hole 7 (FIGS. 1 and 3) of the lens holder 2. Such an elevating table 154 is usually located at a position substantially directly below the lens holder 2 (FIG. 14A), and is raised by driving the air cylinder 155 when the lens holder 2 is centered (FIG. 14B). ), The concave portion 156 receives the lens holding portion 6 of the lens holder 2, and the convex portion 157 is fitted into the center hole 7, whereby the center of the lens holder 2 and the center of the convex portion 157 are aligned. At this time, the pair of holder hands 48A and 48B are open and flexible to enable centering, and hold the lens holder 2 so as to be movable in the left and right and front and rear directions. When the lens holder 2 is centered, the elevating table 154 is subsequently lowered and returned to the original initial position, thereby completing the centering.

  5 and 15 to 17, the holder holding device 23 is disposed in a space between the seal supply device 24 (FIG. 5) and the lens holding device 25 on one side of the holder support mechanism 29. . When the holder holding device 23 receives the lens holder 2 centered from the holder support mechanism 29 at the holder supply position A4, the lens holding surface of the lens holder 2 that is conveyed and held at the seal attachment position A5. After the elastic seal 3 is attached to the lens 9, the lens 1 is conveyed to the lens holding position A6 and held by the elastic seal 3. Such a holder holding device 23 includes a rotating arm 160 (FIG. 15), a clamp device 161 that is attached to the tip of the rotating arm 160 and holds the lens holder 2, and the rotating arm 160 in a horizontal plane. Arm driving motor (arm driving device) 162 and a clamp air cylinder (clamp driving device) 163 for moving the clamp device 161 up and down.

  The rotating arm 160 is fixed to an upper end portion of a vertical rotating shaft 165 erected on the base 21. The rotating shaft 165 is rotatably disposed in a cylindrical body 166 standing on the base 21 via a radial bearing 167 and a thrust bearing 168, and a toothed pulley 169 is fixed to a lower end. The drive motor 162 is vertically fixed to an attachment member 170 provided on the base 21 with the output shaft 171 facing upward. A shaft 172 is connected to the output shaft 171 via a coupling 173. The shaft 172 includes a toothed pulley 174, and a timing belt 175 is stretched between the pulley 174 and the pulley 169. Therefore, when the drive motor 162 is driven to rotate the output shaft 171, this rotation is transmitted to the rotating shaft 165 via the coupling 173 -shaft 172 -pulley 174 -timing belt 175 -pulley 169, and the rotating arm 160 is moved horizontally. It can be rotated inside. The rotation angle of the rotation arm 160 is 300 ° in the present embodiment.

  The clamp device 161 includes a cylindrical main body 82 into which the fitting shaft portion 4 of the lens holder 2 is fitted, a holder fixing mechanism 83 that fixes the lens holder 2 to the main body 82 and prevents the lens holder 2 from falling off. Yes. The main body 82 is fixed to the lower end of a holding shaft 85 that is disposed at the tip of the rotating arm 160 so as to be movable up and down and rotatable. The holder fixing mechanism 83 includes a holder fixing member 84 that is pivotally supported in the direction of arrow 87 in FIG. 15R> 5 by a support pin 86 provided on the main body 82. The holder pressing member 84 presses and fixes the lens holder 2 to the main body 82, and the lower end forms a pressing portion 84 a that presses the fitting shaft portion 4 of the lens holder 2, and is formed on the peripheral surface of the main body 82. The pressing portion 84a normally protrudes outside the main body 82 by being disposed in the elongated hole 88 that is long in the axial direction and biased counterclockwise in FIG. 13 by the tension coil spring 89. . This is to facilitate the fitting of the lens holder 2 to the main body 82.

  Furthermore, the holder fixing mechanism 83 includes an air cylinder 90 that operates the holder fixing member 84. The air cylinder 90 is attached to the outer periphery of the main body 82 with the operating rod 90a facing the holder fixing member 84. When the fitting shaft portion 4 of the lens holder 2 is fitted to the main body 82, air is supplied. The movable rod 90a is configured to press the holder fixing member 84 and rotate it clockwise against the tension coil spring 89. Therefore, the pressing portion 84a of the holder fixing member 84 presses the fitting shaft portion 4 of the lens holder 2 and presses it against the inner peripheral surface of the main body 82, thereby preventing the lens holder 2 from falling off.

  The shaft 85 is disposed to penetrate the outer cylinder 94 fixed to the distal end of the rotating arm 160 so as to be movable up and down and rotatable, and has an upper end coupled to the clamping air cylinder 163. And a lower end of the sleeve 102 disposed below the outer cylinder 94 is rotatably and vertically movable. The coupling 95 includes a cylindrical first coupling 95A fixed to the movable rod 63a of the air cylinder 163, and a second coupling 95B including a cylindrical body connected to the first coupling 95A via a connection pin 96. The upper end of the shaft 85 is rotatably supported by a bearing 97 disposed in the second coupling 95B, and the setscrew 98 prevents the second coupling 95B from falling off. Both end portions of the connecting pin 96 are slidably supported by an inner cylinder 100 provided so as to protrude upward inside the outer cylinder 94, thereby preventing the second coupling 95B from rotating. A pair of guide holes 101 for guiding the connecting pins 96 are formed in the circumferential surface of the inner cylinder 100 so as to be long in the axial direction. Therefore, when the air cylinder 163 is driven to lower the movable rod 163a, the clamp device 161 is lowered together with the shaft 85.

  A driving motor 105 for rotating the clamp device 161 is installed on the upper surface of the rotating arm 160 downward. The drive motor 105 is for rotating the clamp device 161 in accordance with the angle of the astigmatism shaft, and the upper end of the driven shaft 107 is connected to the output shaft 105 a via the coupling 106. The driven shaft 107 is rotatably supported by a bearing 108 provided on the mounting member 110, and a small-diameter gear 109 is fixed to an intermediate portion. The attachment member 110 is fixed to the rotating arm 160. A transmission shaft 111 is disposed on the side of the driven shaft 107 in parallel with the driven shaft 107. The transmission shaft 111 is rotatably supported by a bearing 112 provided on the mounting member 115, a toothed pulley 113 is fixed to the upper end, and a large-diameter gear 114 that meshes with the small-diameter gear 109 at an intermediate portion. Is fixed. The attachment member 115 is fixed to the rotating arm 160.

  A toothed pulley 116 is disposed at an intermediate portion of the shaft 85 corresponding to the toothed pulley 113, and a timing belt 117 is stretched around the pulleys 113 and 116. The toothed pulley 116 is rotatably disposed between the inner cylinder 100 and the sleeve 102 via a bearing 119, and is attached to the shaft 85 so as to be relatively slidable by spline fitting. Yes. For this reason, a long groove 120 is formed on the outer periphery of the shaft 85 in the axial direction, and a protruding body is provided on the inner peripheral surface of the toothed pulley 116 so that the groove 120 is slidably fitted. Yes. Accordingly, the rotation of the drive motor 105 is decelerated by the gears 109 and 114, and then transmitted to the shaft 85 via the toothed pulleys 113 and 116 and the timing belt 117, whereby the clamp device 161 is connected to the astigmatic shaft. It is rotated by an angle.

  The outer cylinder 94 is provided with an origin sensor 121 for positioning the shaft 85 at the origin position and a limit sensor 122 for limiting the rotation range of the shaft 85 to 360 °.

  An arm fixing device 127 is attached to the cylindrical body 166 via a mounting plate 128, and a detent 129 is fixed to the lower surface of the rotating arm 160 corresponding to the arm fixing device 127. When the clamp device 161 is moved to the lens holding position A6 by the rotation of the rotation arm 160 and stopped, the arm fixing device 127 temporarily fixes the rotation arm 160 at the rotation position. Thus, the clamp device 161 is prevented from rotating when the clamp device 161 is pressed against the lens 1. As such an arm fixing device 127, an air cylinder is used, and it is fixed to the mounting plate 128 with its movable rod 127a facing upward. An inverted V-shaped engagement member 130 is attached to the upper end of the movable rod 127a. A V-shaped groove 129a that engages with the engagement member 130 when the clamp device 161 moves to the lens holding position A6 and stops is formed on the lower surface of the rotation stop 129.

  As shown in FIG. 16, the holder mounting position A4, the sticking position A5, the lens holding position A6, and the holder delivery position A7 are centered on the rotation center O of the rotating arm 160, and the distance to the clamping device 161 is a radius. It is provided so that it may be located on the same circumference. The holder mounting position A4 is a position where the clamp device 161 receives and holds the lens holder 2 from the holder support mechanism 29. From this position, the seal attachment position A5 is shifted by 120 ° counterclockwise, and the holder delivery position A7 is 230. The lens holding position A6 is shifted by 270 °. The seal attachment position A5 is a position where the elastic seal 3 is attached to the lens holder 2 held by the clamp 1 device 61. The lens holding position A <b> 6 is a position where the lens holder 2 held by the clamp device 161 holds the lens 1 via the elastic seal 3. The holder transfer position A7 is a position where the lens holder 2 holding the lens 1 (held by the clamp device 161) is transferred to the transfer robot for supplying to the edging apparatus. Note that a standby position A8 for waiting the clamp device 161 is provided between the holder mounting position A4 and the lens holding position A6.

  When the lens holder 2 is held by the clamp device 161, the clamp device 161 is moved above the holder mounting position A4 as shown in FIG. 17 by turning the turning arm 160 (FIG. 17A). When the clamp device 161 stops above the holder mounting position A4, the air cylinder 163 (FIG. 15) is driven to lower the shaft 85, and the main body 82 of the clamp device 161 is moved onto the fitting shaft portion 4 of the lens holder 2 from above. It is made to fit (FIG.17 (b)).

  Next, the air cylinder 90 is driven to rotate the holder fixing member 84 in the clockwise direction against the tension coil spring 89, thereby pressing the pressing portion 84 a of the holder fixing member 84 against the fitting shaft portion 4. Next, when the holder arms 48A and 48B of the holder support mechanism 29 are opened to release the support of the lens holder 2, the lens holder 2 is held by the clamp device 161, and the delivery from the holder support mechanism 29 to the clamp device 161 is completed. . Then, the clamp device 161 rises again, and conveys the lens holder 2 held by the rotation of the rotation arm 60 to the seal attachment position A5.

  4 and 5, the seal supply device 24 is for intermittently supplying the elastic seal 3 to the seal attachment position A5, and faces the holder supply mechanism 28 with the holder support mechanism 29 interposed therebetween. Are disposed at the sticking position A5. The elastic seal 3 is loaded on the roll loading unit 142 in the form of a roll 141 wound around a shaft 140. The roll 141 is formed by arranging the elastic seals 3 in a line at a predetermined interval on the mount 253 (FIG. 18) and covering the surface with the protective paper 254. The protective paper 254 is provided at the sticking position A5. Supplied in a peeled state.

  When the elastic seal 3 is supplied to the sticking position A5 and stopped, the clamp device 161 is moved above the sticking position A5 by the rotation of the rotating arm 160 and stopped. Next, the clamp device 161 descends, and the protruding body 10 bites into the elastic seal 3 by pressing the lens holding surface 9 of the lens holder 2 against the upper surface of the elastic seal 3. When the clamp device 161 is raised, the elastic seal 3 is peeled off from the mount 253 and attached to the lens holding surface 9. When the elastic seal 3 is adhered to the lens holding surface 9, the rotating arm 160 rotates the lens holder 2 held by the clamp device 161 by rotating a predetermined angle counterclockwise in FIG. 5 to the lens holding position A6. Move to. In the middle of this, the presence or absence of the lens holder 2 and the elastic seal 3 is detected. And if it moves to the lens holding position A6 and stops, it will descend | fall and the elastic seal 3 stuck to the lens holder 2 will be pressed and contact | adhered to the lens 1 supplied to lens holding position A6. For this reason, the lens 1 is held by the lens holder 2 via the elastic seal 3. FIG. 2 shows this state. At the lens holding position A6, a lens support device 145 (FIG. 15) for supporting the lens 1 supplied by the lens holding device 25 (FIG. 5) is disposed.

  Here, at the block position A6, the pressing force when the elastic seal 3 attached to the lens holding surface 9 of the lens holder 2 is pressed against the lens 1 and the lens 1 is attached to the elastic seal 3 is sticker attached. At the position A5, the pressing force is switched by the pressing force variable device 255, which is smaller than the pressing force when the lens holder 2 is pressed against the elastic seal 3 and the elastic seal 3 is adhered to the lens holding surface 9. . Hereinafter, switching of the pressing force by the pressing force variable device will be described in more detail with reference to FIGS. 18 and 19.

  18 and 19, reference numeral 240 denotes an air cylinder, reference numeral 241 denotes a support column that is moved up and down by the air cylinder 240, and the rotating arm 50 is rotatably disposed on the upper surface of the support column 241. Reference numeral 244 denotes a shaft that pivotally supports the rotating arm 160.

  The pressing force varying device 255 includes the air cylinder 240, an air supply source 256 that supplies compressed air to the air cylinder 240, a switching valve 258 that is connected to the air supply source 256 via a pipe 257, Pipes 259, 260 and the like for connecting the switching valve 258 and the air cylinder 240 are provided, and the column 241 is installed and fixed to the outer end of the piston rod 261 of the air cylinder 240.

  The switching valve 258 is turned on and off by a solenoid, and as shown in FIG. 20, a cylinder 258A, a spool 258B sliding inside the cylinder 258A, and a biasing force in a direction in which the spool 258B protrudes from the cylinder 258A. And a compression coil spring 258C. The cylinder 258A includes five ports 262a to 262e, and the spool 258B includes two annular grooves 263a and 263b. The port 262a is connected to the air supply source 256, and the ports 262b and 262c form an exhaust port for discharging compressed air returning from the air cylinder 240 to the atmosphere. The ports 262d and 262e are connected to the upper chamber 240a and the lower chamber 240b of the air cylinder 240 via the pipes 259 and 260, respectively.

  The spool 258B is held in a state of protruding from the cylinder 258A by the force of the compression coil spring 258C when the switching valve 258 shown in FIG. In this OFF state, the port 262a and the port 262e communicate with each other through the annular groove 263a, the port 262b closes, and the port 262c and the port 262d communicate with each other through the cylinder 258A. On the other hand, when the switching valve 258 is driven by the drive signal from the control unit to switch to the ON state shown in FIG. 20B, the spool 258B is immersed in the cylinder 258A against the compression coil spring 258C. In this ON state, the port 262a and the port 262d are connected via the annular groove 263a, the port 262b and the port 262e are connected via the annular groove 263b, and the port 262c is closed.

  The upstream end of the pipe 259 is connected to the port 262d of the switching valve 258, and the downstream end is connected to a chamber (upper chamber) 240a above the piston 240A of the air cylinder 240. Further, a speed controller 264 for controlling the flow rate when the compressed air in the upper chamber 240a is exhausted is provided at the downstream end.

  Further, the pipe 259 has two branch pipes 259A and 259B for high pressure and low pressure in the middle, a switching valve 265 is provided in the high pressure branch pipe 259A, and a pressure reducing valve (fluid) is provided in the low pressure branch pipe 259B. Pressure switch means) 266 and a check valve 267 are provided.

  The upstream end of the other pipe 260 is connected to the port 262e of the switching valve 258, and the downstream end is connected to a chamber (lower chamber) 240b below the piston 240A of the air cylinder 240. Further, a speed controller 268 for controlling the flow rate when the compressed air in the lower chamber 240b is exhausted is provided at the downstream end.

The pressure (original pressure) P of compressed air supplied from the air supply source 256 to the pipes 259 and 260 via the switching valve 258 is, for example, 5 kgf / cm ² and is reduced to, for example, 3 kgf / cm ² by the pressure reducing valve 66. The

  The switching valve 265 is fixed to the column 241 and is ON / OFF controlled by driving an air cylinder 270 different from the air cylinder 240. The lens holder 2 is pressed against the elastic seal 3 and elastically sealed. At the time of sticking the sticker 3 for sticking 3 to the lens holding surface 3, it is kept in the ON state (FIG. 18). At this time, the switching valve 258 is also switched to the ON state. In this ON state, the high pressure side branch pipe 259A is open, and the compressed air from the air supply source 256 is port 262a-annular groove 263a-port 262d of the switching valve 258-high pressure side branch pipe 259A-switching valve 265-speed. The air is supplied to the upper chamber 240 a of the air cylinder 240 through the controller 264. On the other hand, when the lens sticking, in which the elastic seal 3 attached to the lens holder 2 is pressed against the lens 1 and the lens 1 is attached to the elastic seal 3 is held in an OFF state (FIG. 19). The switching valve 58 is held in the ON state. When the switching valve 265 is switched to the OFF state, the high pressure side branch pipe 259A is shut off, and the air from the air supply source 256 is 262a-annular groove 263a-port 262d-low pressure side branch pipe 259B-pressure reducing valve 266 of the switching valve 258. Check valve 267 is supplied to the upper chamber 240a of the air cylinder 240 through the speed controller 264.

  The air cylinder 270 switches the switching valve 265, and when the clamp device 51 moves to the block position A6 and stops, the elastic arm 3 is temporarily fixed to the rotational position by temporarily fixing the rotational arm 160 to the rotational position. The cylinder body 271 is fixed to the column 241 and the piston rod 272 passes through the cylinder body 271. The cylinder body 271 is fixed to the column 241. And. Further, the piston rod 272 is provided with an operating member 273 for turning the switching valve 265 ON and OFF at the lower end, and a locking member 274 whose upper surface is pointed in a mountain shape is attached to the upper end side. A detent 276 having a V-shaped groove 275 is fixed to the lower surface side of the rotating arm 160 corresponding to the locking member 274. The detent 276 is attached at a position facing the locking member 274 when the clamp device 161 moves above the block position A6.

  In FIG. 18, the clamp device 161 is moved above the sticking position A <b> 5 by the rotation of the turning arm 160 and stopped, and the elastic seal 3 is attached to the lens holder 2. At this time, since the switching valve 265 is maintained in the ON state, the compressed air supplied from the air supply source 256 is switched from the port 262a of the switching valve 258 to the annular groove 263a to the port 262d to the high-pressure branch pipe 259A. It is supplied to the upper chamber 240 a of the air cylinder 240 through the valve 265 -speed controller 264, pushes down the piston 240 A, and presses the lens holder 2 against the elastic seal 3. At this time, the compressed air in the lower chamber 240b passes through the pipe 260 and is exhausted from the exhaust pipe 280 to the outside through the port 262e-annular groove 263b-port 262b of the switching valve 258.

The pressing force when pressing the lens holder 2 against the elastic seal 3 is 5 kgf / cm ² which is the same as the set pressure of the air supply source 256. Further, the air supplied from the air supply source 56 is also supplied to the low-pressure side branch pipe 259B, and the pressure is reduced to 3 kgf / cm ² by the pressure reducing valve 266. The decompressed air does not open the check valve 267 because the high-pressure compressed air from the high-pressure branch pipe 259A is added to the downstream side of the check valve 267.

  After pressing the lens holding surface 9 of the lens holder 2 against the elastic seal 3 and attaching the elastic seal, when the switch-off valve 58 is switched to the OFF state, the compressed air from the air supply source 256 becomes the port of the switch valve 258. 262a-annular groove 263a-port 262e-piping 260-speed controller 268 is supplied to the lower chamber 240b of the air cylinder 240. On the other hand, the compressed air in the upper chamber 240a is discharged from the pipe 280 to the atmosphere through the speed controller 264-low pressure side pipe 259B-check valve 267-pressure reducing valve 266-port 262d-port 262c of the switching valve 258. For this reason, piston 240A raises and returns to the original height position. Therefore, the lens holder 2 rises together with the support 241 and the rotating arm 50, and the elastic seal 3 is peeled off from the mount 253 and attached to the lens holding surface of the lens holder 2.

When the sticking of the elastic seal 3 to the lens holder 2 is completed, the turning arm 160 turns the lens holder 2 to which the elastic seal 4 is stuck at a block position A6 by rotating a predetermined angle as shown in FIG. Move up and stop. When the rotating arm 160 stops, the air cylinder 270 is driven to raise the piston rod 272 and engage the engaging member 274 with the V-shaped groove 275 of the detent 276. Further, since the actuating member 273 is separated from the switching valve 265 as the piston rod 272 is lifted, the switching valve 265 is switched to an OFF state and closes the high pressure side branch pipe 259A. Further, the switching valve 258 is also switched to the ON state. After that, compressed air is supplied from the air supply source 256 through the port 262 a of the switching valve 258, the annular groove 263 a, the port 262 d, the low pressure side branch pipe 259 B, the pressure reducing valve 266, the check valve 267, and the speed controller 264. The elastic seal 3 is pressed against the lens 1 by being supplied to the side chamber 240a and the column 241 and the rotating arm 160 are lowered, so that the lens 1 is attached. The pressing force at this time is 3 Kgf / cm ² because the compressed air supplied from the air supply source 256 is decompressed by the pressure reducing valve 266 and supplied to the upper chamber 40a.

  When the lens holder 2 is raised and returned after the lens 1 is attached to the elastic seal 3, the switching valve 258 is switched to the OFF state as in the case of sticking the seal, and the compressed air from the air supply source 256 is switched to the switching valve. 258 port 262 a -annular groove 263 a -port 262 e -pipe 260 -feed through speed controller 268 to lower chamber 240 b of air cylinder 240. Thus, the compressed air in the upper chamber 240a is discharged from the pipe 280 to the atmosphere through the speed controller 264-low pressure side pipe 259B-check valve 267-pressure reducing valve 266-port 262d-switch 258c. For this reason, piston 240A raises and returns to the original height position, and the sticking process of lens 1 is completed.

  4 and 5, the lens holding device 25 holds the uninspected lens supplied to the block position A6 and supplies it to the lens meter 26. When the lens measurement by the lens meter is completed, the lens is again returned to the block position A6. To be transported. The lens holding device 25 has three tables that are independently movable in three orthogonal directions (X, Y, and Z-axis directions), that is, two guide rails 56 and a ball screw 57 in the Y-axis direction. A Y table 58 that is freely movable, an X table 61 that is mounted on the Y table 58 via two guide rails 59 and a ball screw 60, and is movable in the X-axis direction. A Z table 62 that is movable in the Z-axis direction and a drive motor (not shown) that drives these tables are provided. The Z table 62 includes a pair of left and right hands 63A and 63B, and is configured to hold four outer peripheral edges of the lens 1 supplied to the lens holding device 25 by these hands. When the pair of hands 63A and 63B receives and holds the lens 1 supplied to the lens holding device 25, the pair of hands 63A and 63B transports the lens 1 to the lens meter 26 and performs lens measurement. When the measurement is completed, the lens 1 is moved to the lens holding position A6 and the lens 1 is placed on the lens support device 145. During this time, the height of the concave lens surface of the lens is measured.

  The lens meter or measuring device 26 measures the lens power, optical center, astigmatic axis, etc. of the unexamined lens 1 supplied to the lens holding device 25, performs optical layout, and a lens holder based on the lens frame shape data. The attachment position, angle, and the like of the second lens 1 are calculated and determined. And it is comprised so that the result may be output to a control part.

  The lens 1 measured by the lens meter 26 is held by the lens holder 2 by being conveyed to the block position A6 and then pressing the elastic seal 3 adhered to the lens holder 2 as described above. Then, when the lens holder 2 holding the lens 1 is conveyed to the holder delivery position A7 by the rotation of the rotation arm 160 and removed from the clamp device 161, it is held by an appropriate conveyance robot and conveyed to the edging apparatus. Then, as shown in FIGS. 9 and 10, the clamp shaft 70 is attached. In this case, in the present embodiment, an example is shown in which the outer periphery of the lens 1 is cut by a bevel cutter 71 and a beveling process is performed in which a V-shaped protrusion 72 called a bevel is formed on the outer periphery of the lens.

  The lens holder 2 is mounted by fitting the proximal end portion of the fitting shaft portion 4 into the center hole 70 a of the clamp shaft 70, and the flange 5 is in contact with the distal end surface of the clamp shaft 70. A protruding engagement portion 73 that engages with the rotation prevention portion 8 of the lens holder 2 is integrally provided on the tip surface of the clamp shaft 70, thereby preventing rotation of the lens holder 2 with respect to the clamp shaft 70. is doing. Further, on the opposite side of the clamp shaft 70 across the lens 1, another clamp shaft 74 is disposed with its axis aligned. A pressing member 75 made of an elastic body such as rubber that presses the concave lens surface 1 b of the lens 1 is attached to the tip surface of the clamp shaft 74. Therefore, the lens 1 is sandwiched between the elastic seal 3 and the pressing member 75. The clamp shafts 70 and 74 are rotated in the directions of arrows A and B in synchronization with the cutting of the lens 1, and at the same time, controlled to move in a direction (Y direction) orthogonal to the axis based on the lens frame shape data. It is configured.

  The bevel cutter 71 forms a milling cutter with a cutter body 77 and four cutting blades 78 attached to the outer periphery of the cutter body 77, and is attached to a shaft 79 parallel to the clamp shafts 70 and 74. . The cutting blade 78 is formed by sintering a diamond sintered body on the surface of a chip of cemented carbide or the like, and a V-shaped bevel groove 84 is formed in the intermediate portion in the width direction of the tip blade 78a. ing. There are two types of bevel grooves 84, a small bevel groove and a large bevel groove. The bevel angle α is about 110 to 125 °, and the bevel height H is, for example, about 0.4 to 0.68 mm for a small bevel and about 0.7 to 0.9 mm for a large bevel. Also, a flat cutter can be used.

Next, the beveling of the lens with the bevel cutter will be described.
First, the lens holder 2 holding the lens 1 is mounted on one clamp shaft 70, the other clamp shaft 74 is advanced, and the pressing member 75 is pressed against the concave lens surface 1b of the lens 1, and the elastic seal 3 and the pressing member are pressed. 75 holds the lens 1. Further, a machining program is created based on the lens frame shape data, and is input to the control unit of the edging apparatus.

Next, the bevel cutter 71 is rotated in the direction of arrow C so that the cutting blade 78 is directed from the top to the bottom by driving a driving device (not shown). Further, when the lens 1 is rotated in the same direction as the bevel cutter 71 and simultaneously moved in the arrow Y direction according to the machining program to bring the outer peripheral surface into contact with the lens cutter 71, the leading edge 78a of the cutting blade 78 bites into the lens outer periphery. A lens having a bevel 72 on the peripheral surface with a contour shape substantially matching the shape of the frame is finally produced by cutting a predetermined depth of cut.
In the above-described embodiment, the example in which the rotation preventing portions 8 and 11 provided on the outer periphery of the lens holder 2 are configured by the grooves has been described. However, the present invention is not limited to this, and the projecting shape is not limited thereto. It may be a body.

  In the present embodiment, at least one curve difference between the convex lens surface 1a of the lens 1 and the lens holding surface 9 is set so that the lens holder 2 always comes out, but the same curve or ± 1 curve is used. This can be covered by the thickness and characteristics of the elastic seal 3.

  As can be understood from the description of the embodiment described above, according to the present invention, the holder holding device 23 including the rotating arm 160 and the clamp device 161 attached to the rotating arm 160 so as to be movable up and down is provided. Therefore, the step of holding the lens holder 2 at the holder mounting position A4, the step of attaching the elastic seal 3 to the lens holder 2 at the seal attachment position A5, and the lens 1 at the lens holding position A6 by the elastic seal 3 All of the series of steps to be held can be performed automatically. Therefore, the burden on the worker is remarkably reduced, and the work efficiency and productivity can be improved and labor can be saved. Moreover, since the operator does not hold the lens 1 during the above-described process, there is no possibility that the lens 1 is soiled or damaged. Further, since the holder mounting position A4, the sticking position A5, and the lens holding position A6 are positioned on the same circumference centering on the rotating arm 160, a small space is not required and a small ABS device is provided. Can be provided.

  In the above embodiment, as the holder fixing mechanism 83, the holder fixing member 84, the spring that holds the holder fixing member 84 in an open state, and the air cylinder that operates the holder fixing member 84 and presses it against the lens holder 2. However, the present invention is not limited to this, and the holder fixing member 84 may be pressed against the lens holder 2 by a spring, and the holding of the lens holder 2 by the holder fixing member 84 may be released by an appropriate driving device, mechanism, or the like. Is possible.

  Further, according to the present embodiment, at the time of sticking the seal in which the lens holding surface 9 of the lens holder 2 is pressed against the elastic seal 3 and the elastic seal 3 is attached to the lens holding surface 3, the lens holder 2 is pressed with a large pressing force. Therefore, the elastic seal 3 can be reliably peeled off from the mount 253 and can be securely attached to the lens holding surface 9. Further, when the lens sticking, in which the elastic seal 3 attached to the lens holding surface 9 of the lens holder 2 is pressed against the lens 1 and the lens 1 is attached to the elastic seal 3, the pressing at the time of sticking the above-mentioned seal is performed. Since the pressing is performed with a pressing force smaller than the pressure, the lens 1 is not damaged and can be securely attached. Also, the structure of the pressing force variable device 255 is simple.

FIG. 21 is a schematic configuration diagram showing another embodiment of the present invention.
In this embodiment, a rotating arm 160, a clamp device 161 attached to the rotating arm 160 so as to be movable up and down, a drive motor 203 with a speed reduction mechanism for rotating the rotating arm 160, and the clamp The lens holding device 23 is constituted by the air cylinder 201 that moves the device 161 up and down. Further, the pressing force variable device 200 is provided by the air cylinder 201, the air supply source 256, the pipes 259 and 260, the switching valve 202 provided in the pipe 259 to which compressed air is supplied when the clamp device 51 is lowered. The flow path of the switching valve 202 is switched by an electrical signal from the control unit.

  In such a pressing force variable device 200, the lens holder 2 is pressed against the elastic seal 3 with a large pressing force by supplying high-pressure compressed air to the air cylinder 201 when sticking the seal. On the other hand, when the lens is attached, the switching valve 202 is switched by an electrical signal from the control unit and low pressure compressed air is supplied to the air cylinder 201, whereby the elastic seal attached to the lens holder is attached to the lens. Press with less pressing force than when wearing. Therefore, similarly to the above-described embodiment, the elastic seal 3 can be reliably peeled off from the mount 253, and the lens can be stuck without being damaged.

  In the above-described embodiment, an example is shown in which the present invention is applied to the ABS device 20 for a single focus lens. However, the present invention is not limited to this, and the present invention can also be applied to an ABM device for progressive multifocal and multifocal lenses. is there.

  Further, the pressing force variable devices 255 and 200 are not limited to the above-described embodiments, and various changes and modifications are possible. In short, the pressing force at the time of sticking a sticker and attaching a lens is important. Anything that changes

  In the above-described embodiment, an example is shown in which the present invention is applied to an ABS device for a single focus lens. However, the present invention is not limited to this and can also be applied to an ABM device for a multifocal lens.

(A), (b) is the front view and rear view of a lens holder used for the apparatus which attaches a lens to the lens holder by this invention. It is sectional drawing which shows the state which mounted | wore the lens holder through the elastic seal. (A), (b), (c) is the III-III line expanded sectional view of FIG. 1, the figure which shows a lens holding surface, and the expanded sectional view of the holding surface. It is a front view of the ABS apparatus for single focus lenses. It is a top view of the ABS apparatus of FIG. (A), (b), (c) is sectional drawing of the cassette for holder accommodation, the figure which shows the state before mounting | wearing with a chute, and the figure which shows the mounted state. It is sectional drawing of the cassette center part away from the pin position. It is a figure which shows the delivery part and shutter mechanism of a lens holder. It is a figure which shows the state which is performing the beveling process of a lens. FIG. 10 is a view on arrow V in FIG. 9. (A), (b) is the top view and front view of a holder support mechanism. It is a figure which shows holding | maintenance operation | movement of the lens by a holder support mechanism. It is a figure which shows holding | maintenance operation | movement of the lens by a holder support mechanism. (A), (b) is a figure which shows the centering operation | movement of the lens holder by a centering mechanism. It is sectional drawing of a holder holding | maintenance apparatus. It is a figure which shows the seal positional relationship example of holder mounting position A4, sticker sticking position A5, lens holding position A6, holder delivery position A7, and standby position A8. (A), (b) is a figure which shows holding | maintenance operation | movement of the lens holder by a clamp apparatus. It is a figure which shows operation | movement when sticking an elastic seal | sticker to a lens holder. It is a figure which shows operation | movement when sticking a lens on an elastic seal | sticker. (A), (b) is a figure which shows ON and OFF operation | movement of a switching valve. It is a schematic block diagram which shows other embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Lens, 2 ... Lens holder, 3 ... Elastic seal, 9 ... Lens holding surface, 23 ... Holder holding device, 31 ... Holder storage cassette, 82 ... Cylindrical main body, 83 ... Holder fixing mechanism, 84 ... Holder fixing member , 89 ... spring, 160 ... rotating arm, 161 ... clamp device, 162 ... arm drive device, 163 ... clamp drive device, A4 ... holder mounting position, A5 ... seal sticking position, A6 ... lens holding position.

Claims (2)

A lens layout block device for blocking the raw lens on a lens holder attached to a mounting portion of an edging device that rims the raw spectacle lens into a lens frame shape of a predetermined spectacle frame. There,
A holder holding device for sticking an elastic seal to the lens holder and blocking the spectacle lens on the lens holder to which the elastic seal is attached;
The holder holding device includes a rotating arm that is rotatably attached to a vertical rotating shaft, a clamp device that is attached to the rotating arm so as to be movable up and down, and a rotating device that rotates the rotating arm to rotate the rotating arm. An arm drive device that sequentially moves the clamp device to a holder mounting position, a sticker attaching position, and a lens holding position, a clamp drive device that moves the clamp device up and down, and the clamp device when moved to the lens holding position An arm fixing device for fixing the rotating arm to the rotating position,
The clamp device includes a cylindrical main body into which the lens holder is fitted, and a holder fixing mechanism that fixes the lens holder to the cylindrical main body.
The holder fixing mechanism includes a rotatable holder fixing member, a spring that biases the holder fixing member in a direction away from the lens holder, and presses the holder fixing member against the lens holder against the spring. Constituted by a drive device ,
The clamp device holds the lens holder by the cylindrical body by moving to the holder mounting position by rotation of the rotating arm, and moves the elastic to the lens holder by moving to the seal attaching position. A lens layout block device , wherein a sticker is attached and the raw lens is blocked by the elastic seal by moving to a lens holding position . In the spectacle lens processing method of using the lens edging apparatus to eddle an unprocessed spectacle lens into a lens frame shape of a predetermined spectacle frame,
The step of blocking the unprocessed spectacle lens on a lens holder mounted on a mounting portion of the edging apparatus is performed using the lens layout block device according to claim 1, and the blocked lens. A method for processing a spectacle lens, characterized in that the edging device processes the edging .

Images