JP2001232542A - Layout and block device for lens - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve workability and productivity by performing layout and block of a lens for performing edge grinding of the lens automatically. SOLUTION: A holder supply mechanism 28 is provided to supply a plurality of types of lens holders per type. This lens supply mechanism 28 is provided with a plurality of chutes 30 on which cassettes 31 storing the lens holders 2 per type are mounted and a shutter mechanism discharging the lens holders 2 from the chutes 30 one by one. A holder supporting mechanism 29 receiving, supporting, and centering the lens holders 2 supplied from the holder supply mechanism 28 is provided. This holder supporting mechanism 29 is provided with a stage 43 reciprocating and moving between a holder mounting position A4 and terminal positions A1, A2, A3 of each chute 30, holder hands 48A, 48B provided on the stage 43 to hold the lens holders 2, and a centering mechanism centering the lens holders 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lens layout for determining a processing center of a lens for edging a spectacle lens, and mounting a processing jig at the processing center.
Related to block devices.

[0002]

2. Description of the Related Art There are various types of spectacle lenses (hereinafter, also simply referred to as lenses) such as a single focus lens, a multifocal lens, a progressive multifocal lens, and the like. It is necessary to produce many kinds of lenses because they are different.

[0003] Conventionally, such edging of a lens is performed by:
It was performed according to the following procedure. That is, for example, in the case of processing a single focus lens, firstly, when a prescription lens is determined, in the case of a normal prescription, a prescription lens is selected from stock lenses (mass-manufactured products in a stock) and the If there is no lens (custom-made product that is out of stock), it will be manufactured at the factory according to the order. The stock lens has a front surface (convex lens surface) and a back surface (concave lens surface) finished to a predetermined lens curvature (curve) based on an optical design so as to have a predetermined lens power. The process is performed up to the final step up to the surface treatment such as the prevention coat. On the other hand, for custom-ordered products,
A lens material is prepared in advance as a semi-finished product (semi-lens), which is roughly cut and polished according to the prescribed prescription frequency, and then subjected to a surface treatment to be used as a prescription lens.

[0004] When the prescription lens is manufactured, the lens is stored horizontally together with the processing instruction sheet in the lens storage tray with the concave lens surface down, and is conveyed to the edge finishing line.
Then, the operator removes the prescription lens from the tray, places it on the inspection table of a predetermined inspection device such as a lens meter, checks the lens power and astigmatism axis of the prescription lens, and obtains the lens information and the lens frame shape data. From the prescription data of the wearer, an attachment angle of a processing jig (hereinafter, referred to as a lens holder) with respect to a processing center and a lens is determined (optical layout). Next, based on this, the lens holder is attached to the processing center of the lens (block). And
This lens holder is attached to the edging device together with the lens, and the lens is edged with a grindstone or cutter.
Shape it to match the frame shape of the eyeglass frame.

[0005]

As described above, in the prior art, the layout and the block of the lens, which are the pre-process for the edging of the lens, have been performed by the operator using a dedicated device. However, such operations are inefficient and have low productivity, and are a major obstacle to labor saving.
In addition, it is necessary to pay close attention to the handling of the lens so as not to stain, damage, or damage the lens, so that not only the burden on the operator is large, but also the lens holding surface that matches the curvature of the prescription lens is provided. When selecting a lens holder, there is also a problem that an error such as an operator selecting a different type of lens holder is likely to occur.

For this reason, recently, a device for a single focus lens and a device for a multifocal lens (ABS; Auto Blocker) for improving work efficiency by automatically performing lens layout and lens blocking by a lens holder. f
or Single Visoion Lens, ABM; Auto Blocker for M
ultifocus Lens) has been requested. Hereinafter, in the present invention, such a device is referred to as a layout block device.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems and demands, and it is an object of the present invention to automatically perform a layout and a block of a lens for edge trimming of a lens, and It is an object of the present invention to provide a lens layout / block device which can improve labor and productivity and save labor.

[0008]

According to a first aspect of the present invention, a plurality of types of lens holders having lens holding surfaces having different curvatures according to the curvature of the convex lens surface of the lens are provided. And a holder support mechanism for receiving and supporting and centering a lens holder supplied from the holder supply mechanism, wherein the holder supply mechanism is arranged side by side for each type of lens holder. A plurality of chutes are arranged at the ends of these chutes, and usually close the discharge ports of the chutes.
A shutter mechanism for discharging the second lens holder,
The holder support mechanism includes a stage that reciprocates between a holder mounting position and an end position of each of the chutes, a holder hand provided on the stage for holding a lens holder supplied from the chutes, and a holder hand that holds the lens holder. And a centering mechanism for centering the lens holder.

[0009] The second invention is the above-mentioned first invention, wherein:
A cassette for accommodating the lens holder is mounted on the chute, and the lens holder is normally locked near the discharge side opening inside the cassette, and opened to release the lens holder when mounted on the chute. A pin is provided.

In the present invention, the lens holder is automatically supplied to the holder support mechanism from a dedicated chute for each type. Therefore, an erroneous selection of the holder by the operator is prevented. The shutter mechanism sequentially supplies the lens holders one by one to the holder support mechanism. When holding the lens holder, the holder support mechanism conveys the lens holder to the holder mounting position. The centering mechanism centers the lens holder. The falling-off prevention pin prevents the lens holder from falling off the cassette.

The types of lenses can be said to be infinite with a combination of a convex curve and a concave curve with respect to one lens power D (diopter), and are actually determined in consideration of optical aberration and inventory management. More specifically, by adopting a lens design that reduces the types of convex curves and changes the concave curves, for example, a progressive multifocal lens is prepared from eight types of two to nine curves,
In the case of a single focus lens, the corresponding power range is generally wide, and thus, for example, 12 types of curves from 0 curve to 11 curve may be prepared. Note that a lens having a zero curve is a lens having a flat convex lens surface.

The lens power D is represented by the difference between the curvature of the convex curve D1 and the curvature of the concave carp D2. In the case of a semi-finished lens such as a single focus lens or a progressive multifocal lens, only the convex curve D1 is used. I'm sharing. For example, in the case of a single focus lens having a convex lens power D of 4,
It is called a curved lens, and its radius of curvature is D = (N
-1) It is determined by × 1000 / R (mm). In this case, N is the refractive index of the lens, which is 1.50 in the case of diethylene glycol bisallyl carbonate, which is the most general-purpose plastic lens material. R is the radius of curvature of the convex lens surface. Therefore, in the case of four curves,
Substituting into the above equation, 4 = (1.5-1) × 1000 /
From R, R = 125 mm. Similarly, in the case of seven curves, the radius of curvature is about 71 mm, and in the case of eleven curves, it is about 45 mm.

As a lens holder, it is most desirable to use a dedicated lens holder for each lens having a different lens power in order to stably hold the lens. However, if this is done, the number of types of the holder itself will increase significantly. In order to cover several kinds of lenses having different convex curves with one kind of lens holder, several kinds of lenses having different curvatures of the lens holding surface are prepared in advance and selected according to the convex curve. I'm using For example, in the case of 12 types of single focus lenses from 0 to 11 curves, three types of lens holders having a lens holding surface of 4 curves, 7 curves, and 11 curves are prepared, and a lens of 0 to 3 curves is replaced with 4 curves. The lens is held by a lens holder, the lens of 4 to 6 curves is held by the lens holder of 7 curves, and the lens of 7 to 11 curves is held by the lens holder of 11 curves. Such a lens holder is formed in a cylindrical body and has a concave spherical lens holding surface on one end side, and holds the convex lens surface of the lens via a thin elastic seal attached to the holding surface. (Eg, Japanese Utility Model Application Laid-Open No. Hei 6-24854, Japanese Patent Application No. 11-22).
No. 4598).

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, 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, FIG. 2 is a cross-sectional view showing a state where a lens is held by a lens holder via an elastic seal, and FIGS. 3A and 3B. , (C) is III-II of FIG.
FIG. 4 is an enlarged sectional view of the line I, a view showing the lens holding surface, and an enlarged sectional view of the lens holding surface. FIG. 4 is a front view of the ABS device for a single focus lens, FIG. 5 is a plan view of the ABS device, FIG.
(B) and (c) are cross-sectional views of the holder storage cassette, a view showing a state before being mounted on the chute and a view showing the mounted state, and FIG. 7 is a cross-sectional view of a cassette central portion away from the pin position. 8 is a view showing a shutter mechanism of the lens holder, FIGS. 9A and 9B are a plan view and a front view of the holder support mechanism, and FIGS. 10 and 11 are views showing a holding operation of the lens by the holder support mechanism. 12 (a) and 12 (b) are views showing the centering operation of the lens holder by the centering mechanism, FIG.
(A), (b) is a figure which shows delivery of the lens holder to a holder holding device.

First, the structure of a lens and a lens holder processed by the single focus lens ABS device will be described with reference to FIGS. In these figures, reference numeral 1 denotes a single-focus lens for plastic spectacles (hereinafter simply referred to as a lens), which has a convex lens surface 1a and a concave lens surface 1b, and whose outer peripheral surface is formed into a lens frame shape by an edge finishing device. The edging is performed so as to match. Also, this lens 1
In the case of a single focus lens, since the corresponding power range is generally wide as described above, for example, twelve types from a 0 curve to an 11 curve are prepared. Three lens groups according to large, medium, and small, for example, a first lens group having 0 to 3 curves, and 4 to 6
It is classified into a second lens group having a curve and a third lens group having a curve of 7 to 11. 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 via the elastic seal 3.

The lens holder 2 is formed in a flanged cylindrical body with a metal such as stainless steel, so that the fitting shaft 4 and the outer periphery of the fitting shaft 4 are integrated with the leading end and the leading end. And a lens holding portion 6 provided in the lens. The fitting shaft portion 4 has, for example, a length of about 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 the amount of fitting of the fitting shaft portion 4 to the clamp shaft of the edging machine, 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 a peripheral surface of the flange 5 as a rotation preventing portion for preventing the rotation of the lens holder 2 with respect to the clamp shaft. An open portion of the notch groove 8 on the side opposite to the lens holding portion 6 side forms a tapered surface 8a that is opened outward to facilitate fitting to the clamp shaft.

The lens holding portion 6 is provided on the outer periphery of the distal end side of the fitting shaft portion 4, has substantially the same thickness and outer diameter as the flange 5, and has an interval of about 5 mm between the flange 5 and the lens 5. I have. The surface of the lens holding portion 6 with which the elastic seal 3 is in close contact forms a concave spherical lens holding surface 9 corresponding to the convex lens surface 1a of the lens 1.

In this case, if the lens holding surface 9 corresponding to the convex curve is formed for each lens, the type of the lens holder 2 itself increases, so that the radius of curvature of the lens holding surface 9 is changed stepwise. The number of types of lens holders 2 is reduced, and one type of lens holder 2 holds several types of lenses 1 having different convex curves. Specifically, three types of lens holders 2 are prepared by making the radii of curvature of the lens holding surfaces 9 different for each of the first, second, and third lens groups.

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 central portion of the lens holding surface 9 contacts the convex lens surface 1a and the outer peripheral portion is not in contact. On the other hand, when the lens 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. Therefore, in the lens holder 2, the radius of curvature of the lens holding surface 9 is set to a value smaller than or substantially equal to the smallest radius of curvature of each lens in the lens group corresponding to the holder. The stable lens holding by the outer peripheral portion of the holding surface 9 is enabled. However, if the difference between the two radii of curvature is large, the degree of adhesion between the lens holding surface 9 and the convex lens surface 1a decreases, so that the difference is desirably small.

For this reason, in the present embodiment, three types of lens holders 2 having a lens holding surface 9 of four curves, seven curves, and eleven curves are prepared.
7 for the first lens group consisting of lenses
A curved lens holder is used for the second lens group composed of 4-6 curved lenses, and an 11 curved lens holder is
Each of them is used for a third lens group composed of lenses having up to 11 curves. The three types of lens holders 2 including the four curves, the seven curves, and the eleven curves are different from each other only in the radius of curvature R of the lens holding surface 9 and are completely the same in other structures.

Further, on the lens holding surface 9, a large number of minute projections 10 are formed radially over the entire circumference in order to increase the tight bonding force with the elastic seal 3.
The protruding body 10 has a cross-sectional shape formed into an isosceles triangle, 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 have the same inclination angle with respect to the vertex 10a (for example, 45 °). With the same angle, the elastic seal 3 comes into close contact with both slopes evenly, and the contact area increases.
Appropriate flexibility and deformability of the sheet can be utilized to increase the lens holding force. In addition, since the elastic seals 3 are uniformly pressed against the two inclined surfaces having the same inclination angle, the unbalanced rotational force is canceled out and no longer occurs.
Does not degrade the holding accuracy of the lens due to the rotational displacement.

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

Further, a member 13 for discriminating the type of the lens holder 2 is press-fitted inside the lens holder 2 at the base end side of the fitting shaft portion 4, and one end face of the member 13 is inserted into the lens holder 2. It forms substantially the same plane as the base end face. This member 1
Numeral 3 is formed in a cylindrical body colored in a required color by a synthetic resin. The color of the member 13 is colored white, for example, in the case of a four-curve holder, red in the case of a seven-curve holder, and blue in the case of an eleven-curve holder. Therefore, by observing the color of the member 13, it is possible to identify at a glance whether the lens holder 2 has four curves, seven curves, or eleven curves.

The elastic seal 3 has a thickness of 0.5 to 0.5 mm.
A thin rubber of about 6 mm is formed in a ring shape having 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). What is applied is used.

Next, the configuration of the ABS device for a single focus lens will be described with reference to FIGS. 4 and 5, the single-focal-length lens ABS device 20 is installed adjacent to the edging device, and includes a holder transport device 22 provided on a base 21, a holder holding device 23, and a seal. It has a supply device 24, a lens supply device 25, a lens meter 26, and the like, and has 12 types (0 to 1) having different convex curves.
A batch system in which single-curve lenses of one curve are randomly and sequentially processed is adopted.

The holder transfer device 22 has four curves, seven
This is for sequentially supplying the three types of lens holders 2 of the curve and the eleven curve to the holder holding device 23 according to the prescription lens. The holder supply mechanism 28 and the holder support mechanism 2 are provided.
9 is provided.

The holder supply mechanism 28 includes three lens holders 2 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 holder supply direction (the direction of arrow 27 in FIG. 5). On the upstream side of the chutes 30, three holder storage cassettes 31 each storing a required number (for example, 42) of lens holders 2 for each type are detachable at the same angle as the chutes 30. It is installed in.

In FIG. 6, the cassette 31 is formed of a metal, synthetic resin or the like into an elongated rectangular hollow body whose both ends are open, so that the lens holders 2 are arranged in a line and the direction of the rotation preventing portion 11 is changed. The opening 33 is formed in the upper plate 32 over the entire length, and the base end side of the lens holder 2 from the flange 5 is projected upward of the cassette 31 from the opening 33. I have. Therefore, the member 13 can be visually recognized from above the cassette 31, and when different types of lens holders 2 are mixed and stored in the cassette 31,
You can check at a glance. In addition, it is possible to prevent the mounting error of the cassette 31. That is, the cassette 3
Since 1 itself is also identified by the color of the member 13, a certain cassette is set on a chute other than the chute to be originally set, or a plurality of cassettes accommodating the same kind of lens holder are set on a plurality of chute. Such mistakes can be prevented.

The width of the opening 33 is set slightly larger than the outer diameter of the fitting shaft 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 stepwise so that one plate portion 32a is higher than the other plate portion 32b by the plate 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 the plate portion 3a
An inverted L-shaped bracket 34 inserted into the rotation preventing portion 11 is also fixed to the lower surface side of 2a, and the orientation of the lens holder 2 is aligned by these to prevent free rotation. A pair of falling-off prevention pins 35 for preventing the lens holder 2 from falling off is provided in the cassette 31 near the downstream opening so as to be movable in the left-right direction. Since the lower ends of these pins 35 are connected to each other by a tension coil spring 36 and are urged in a direction approaching each other, the pins 35 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 tension coil spring 36
The lens holder 2 moves in the direction away from each other against
Is released. Note that pin 3
The movement of 5 in the separating direction is performed by an appropriate member 37 provided on the chute 30 side.

FIG. 7 is a cross-sectional view of the central portion of the cassette remote from the pin position, which differs from the first embodiment in that a pair of falling-off prevention pins 35 is not provided.

The lens holder 2 in the cassette 31 slides on the cassette 31 and the chute 30 by its own weight, and is successively discharged one by one by the shutter mechanism 38, and is supported by the holder supporting mechanism 29.

4 and 8, the shutter mechanism 38 comprises a pair of stopper pins 39 for locking the first lens holder 2A by normally closing the discharge port 30a of the chute 30, and these stopper pins 39 And an air cylinder 40 that moves the lens holder 2 up and down. The lens holder 2 is discharged from the chute 30 by driving the air cylinder 40 according to a supply signal from the control unit. That is, when the stopper pin 39 is lowered by driving of the air cylinder 40 and retreats from the passage of the chute 30, the first lens holder 2A is released from the stopper pin 39.
a and moves onto the terminal end 30b. This terminal part 30
b is set to a small inclination angle in order to reduce the sliding speed of the lens holder 2 and reduce the impact when the lens holder 2 hits a stopper 47 of the holder support mechanism 29 described later. When the first lens holder 2A passes, the stopper pin 39 rises and returns to the original state again. For this reason, the second lens holder 2B slides on the chute 30 to the position of the stopper pin 39 and is locked by the stopper pin 39 to become the first lens holder. By repeating such operations, the lens holders 2 are automatically supplied one by one. Note that the chute 30 is also formed substantially the same as the cassette 31, and is fixed on the base 21. Further, sensors (FIG. 4) 41 for detecting the presence / absence of the lens holder 2 are attached to two locations on the downstream side and the intermediate portion of the chute 30.
The upstream sensor 41 is turned on when the number of remaining lens holders 2 in the chute 30 becomes nine, and prompts replenishment. The sensor 41 on the downstream side is turned on when the remaining lens holder 2 in the chute 30 becomes one and stops the apparatus.

5, 8 and 9, the holder support mechanism 29 is disposed on the base 21 so as to face the end of the chute 30, and is disposed in the front-rear direction of the ABS device 20. A stage 43 is provided which is movable in the direction of arrow Y in FIG. 5 and which reciprocates between the end positions A1, A2, A3 of the chutes 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 the driving of the drive motor 46, the rail 44 and the ball screw It is configured to move along 45. At the terminal positions A1, A2, A3 of the chutes 30, the terminal portions 30b of the chutes 30 are positioned.

On the upper surface of the stage 43, a stopper 47 for receiving the lens holder 2 supplied to the end portion 30b of the chute 30 and a pair of holder hands 48A, 48B for supporting the lens holder 2 are provided. An air cylinder 49 for operating the holder hands 48A and 48B in synchronization with each other in a direction of approaching and separating from each other is provided. One holder hand 48A is formed of a rod-shaped body having a circular cross-sectional shape, and holds the rotation preventing portion 11 of the lens holder 2 on the peripheral surface at the distal end. The other holder hand 48B is formed of a rod-shaped body having a rectangular cross section, and the lens holder 2
A V-shaped concave portion 50 is formed on the side surface facing the
The concave portion 50 holds the outer peripheral surfaces of the flange 5 and the lens holding portion 6 on the opposite side of the lens holder 2 from the rotation preventing portion 11. Such a stage 43 is provided with the lens holder 2 of the three chutes 30 when the lens holder 2 is supplied.
The lens holder 2 moves to the end position of the chute to be supplied, for example, the position A1, and stands by with the holder hands 48A and 48B opened (FIG. 10). Then, the stopper 4
7 receives the lens holder 2 and a pair of holder hands 4
The lens holder 2 is clamped by closing 8A and 48B (FIG. 11). Thereafter, the clamped lens holder 2 is transported to the holder mounting position A4, and after the lens holder 2 is centered, the lens holder 2 is transferred to the holder holding device 23.

In FIG. 12, the holder mounting position A4
A centering mechanism 53 for centering the lens holder 2 supported by the holder hands 48A and 48B.
Are arranged. The centering mechanism 53 includes a lifting table 54 and an air cylinder 55 that moves the lifting table 54 up and down. A relatively shallow recess 56 having a hole diameter slightly larger than the outer diameter of the lens holder 6 of the lens holder 2 is formed on the upper surface of the lifting table 54. Further, a circular convex portion 57 is provided at the center of the concave portion 56, and the outer diameter of the circular convex portion 57 is set at the center hole 7 of the lens holder 2.
It is set slightly smaller than (FIG. 3). Such an elevating table 54 is normally positioned substantially below the lens holder 2 and spaced apart (FIG. 12A), and is raised by driving the air cylinder 55 when centering the lens holder 2 (FIG. 12B). ), The concave portion 56 receives the lens holding portion 6 of the lens holder 2 and the convex portion 57 is fitted into the center hole 7, so that the center of the lens holder 2 and the center of the convex portion 57 are aligned and centered. At this time, the pair of holder hands 48
A and 48B are air cylinders 4 to enable centering.
The lens holder 2 is open to provide flexibility, and holds the lens holder 2 movably in the left-right and front-back directions. When the lens holder 2 is centered, the elevating table 54 is subsequently lowered to return to the original initial position, thereby completing the centering.

5 and 13, the holder holding device 23 is disposed in a space between the seal supply device 24 and the lens supply device 25 on one side of the holder support mechanism 29. When the holder holder 23 receives the lens holder 2 centered from the holder support mechanism 29, the holder sticks the elastic seal 3 to the lens holding surface 9 of the lens holder 2, and then attaches the elastic seal to the lens holder 2. 3
The lens 1 is held through the lens. Such a holder holding device 23 includes a rotating arm 60, a clamp device 61 attached to a tip end of the rotating arm 60,
A drive mechanism (not shown) for rotating the rotation arm 60 and a drive mechanism (not shown) for vertically moving the clamp device 61 are provided.

The rotation arm 60 is configured to be rotated about a rotation center O in a horizontal plane. The clamp device 61 is configured to move the holder mounting position A4 and the seal attaching position A
5, lens holding position A6 and holder transfer position A7
The drive is controlled so as to reciprocate between them. Therefore, the clamp device 61, the holder mounting position A4, the sticking position A5, the lens holding position A6, and the holder transfer position A7 are located on the same circumference around the rotation center O of the rotation arm 60. ing. Holder mounting position A4 is
At the position where the clamp device 61 receives and holds the lens holder 2 from the holder support mechanism 29, the sticking position A5 is shifted 120 ° in the counterclockwise direction from this position, the holder transfer position A7 is shifted 230 °, Position A6 is off 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 device 61. Lens holding position A
Reference numeral 6 denotes a position where the lens 1 is held by the lens holder 2 held by the clamp device 61 via the elastic seal 3. The holder transfer position A7 is the lens 1
This is a position where the lens holder 2 (held by the clamp device 61) holding the lens is transferred to a transfer robot for supplying the edge processing device. A standby position A8 for holding the clamp device 61 on standby is provided between the holder mounting position A4 and the lens holding position A6.

When the clamp device 61 moves above the holder mounting position A4 and stops as shown in FIG. 13 (FIG. 13A), the clamp device 61 descends and releases the lens holder 2 held by the holder support mechanism 29. Drive control is performed so as to receive and hold (FIG. 2B). Further, when the lens holder 2 is received from the holder support mechanism 29, the elastic arm 3 is moved to the position above the seal adhering position A5 by the rotation of the rotation arm 60 and the elastic seal 3 is adhered to the lens holding surface 9 of the lens holder 2. Thereafter, the lens 1 is moved to the lens holding position A6 and lowered to drive and control the lens 1 to be in close contact with the elastic seal 3.

4 and 5, the seal supply device 24 is for intermittently supplying the elastic seal 3 to the seal sticking position A5, and is provided with the holder supply mechanism 28 with the holder support mechanism 29 interposed therebetween. They are arranged to face each other. The elastic seal 3 is loaded in a roll loading section 65 in the form of a roll 64 wound around a shaft 63. The roll 64 is formed by arranging the elastic seals 3 in a line at predetermined intervals on a backing paper and covering the surface with protective paper, and is supplied to the seal attaching position A5 in a state where the protective paper is peeled off. You.

When the elastic seal 3 is supplied to the sticking position A5 and stopped, the clamp device 61 is moved above the sticking position A5 by the rotation of the rotary arm 60 and stopped. Next, the protruding body 10 bites into the elastic seal 3 by descending and pressing the lens holding surface 9 of the lens holder 2 against the upper surface of the elastic seal 3. Therefore, the elastic seal 3 is peeled off from the backing paper and adhered to the lens holding surface 9. When the elastic seal 3 is adhered to the lens holding surface 9, the clamp device 61 moves up again to rotate the rotating arm 60.
Is rotated to move to the lens holding position A6. And
The elastic seal 3 which is lowered and adhered to the lens holder 2
Is pressed against the lens 1 supplied to the lens holding position A6 so as to be in close contact therewith. Therefore, the lens 1 is held by the lens holder 2 via the elastic seal 3. FIG. 2 shows this state.

The lens supply device 25 includes two guide rails 70, a Y table 72 movable in the Y-axis direction by a ball screw 71, and two guide rails 73 and a ball screw 74 on the Y table 72. An X table 75 that is movable in the X-axis direction by being installed through
The X table 75 includes a Z table 76 that is movable in the Z-axis direction and a drive motor (not shown) that drives these tables. The Z table 76 includes a pair of left and right hands 77A and 77B, and is configured to hold four points of the outer peripheral edge of the lens 1 supplied to the lens supply device 25 by these hands.
When the pair of hands 77A and 77B receives and holds the lens 1 supplied to the lens supply device 25, the pair of hands 77A and 77B conveys the lens 1 to the lens meter 26 and measures the lens. When the measurement is completed, the lens 1 is conveyed to the lens holding position A6 and mounted on the lens support table. Thereafter, the lens 1 is held by the clamp device 61.

The lens meter 26 measures the lens power, the optical center, the astigmatic axis, and the like of the lens 1 supplied to the lens supply device 25, performs an optical layout, and performs lens layout of the lens holder 2 based on lens frame shape data. A mounting position, an angle, etc. with respect to 1 are calculated and determined. Then, the result is output to the control unit.

When the lens holder 2 holds the lens 1 at the lens holding position A6, the lens transfer position A7
When it is stopped after being removed from the clamp device 61, it is transported to the edging device by an appropriate transport robot. Then, the lens 1 is subjected to edge trimming such as beveling according to a processing program based on the lens frame shape data, and finally a lens having a contour shape substantially matching the shape of the frame frame is manufactured.

According to such an ABS device 20, the lens holder 2 is supplied to the chute 30, the lens 1 is supplied to the lens supply device 25, and the lens frame shape data is transmitted to the control unit by terminal equipment such as a keyboard and a touch panel. When input, supply and centering of lens holder 2 and lens holder 2
A series of processes such as attaching the elastic seal 3 to the lens, holding the lens 1 by the lens holder 2, measuring the lens 1, and laying out can be performed automatically, so that the burden on the operator is significantly reduced, Efficiency and productivity can be improved and labor can be saved. Further, since the holder supply mechanism 28 includes the shutter mechanism 38 and supplies the type of lens holder 2 corresponding to the prescription lens to the holder support mechanism 29, there is a possibility that an error such as supplying a different type of lens holder may occur. There is no. Furthermore, cassette 3
1 is provided with a pin 35 for preventing the lens holder 2 from falling off even if the discharge side opening is lowered, and when the cassette 31 is mounted on the chute 30, the pin 35 for preventing the falling off Since the lens holder 2 is automatically opened and the lens holder 2 is released, the operator does not need to operate the pin 35 each time, and the handling of the cassette 31 is easy.

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

[0047]

As described above, according to the layout block apparatus for a lens according to the present invention, since a lens supply mechanism for supplying a lens holder for each type is provided, an operator can control a prescription lens. An error such as supplying different types of lens holders can be prevented. Further, since the shutter mechanism is provided, the supply of the lens holder can be automatically performed. Furthermore, since the centering mechanism is provided, the centering of the lens holder supported by the holder supporting mechanism can be automatically performed. Therefore, there is no risk of soiling or damaging the lens, the burden on the operator is remarkably reduced, work efficiency and productivity can be improved, and labor can be saved.

Further, according to the present invention, since the cassette is provided with the pins for preventing the lens holder from falling off, the lens holder can be prevented from falling off.

[Brief description of the drawings]

FIGS. 1A and 1B are a front view and a rear view of a lens holder.

FIG. 2 is a diagram showing a state where a lens is held by a lens holder via an elastic seal.

3 (a), 3 (b) and 3 (c) are III-III in FIG.
FIG. 3 is an enlarged sectional view of a line, a view showing a lens holding surface, and an enlarged sectional view of the lens holding surface.

FIG. 4 is a front view of an ABS device for a single focus lens.

FIG. 5 is a plan view of the same device.

FIGS. 6A, 6B, and 6C are a cross-sectional view of the holder storage cassette, a view showing a state before being mounted on the chute, a view showing the mounted state, and a cross-sectional view of the holder storage cassette. is there.

FIG. 7 is a cross-sectional view of a central portion of the cassette separated from a pin position.

FIG. 8 is a view showing a shutter mechanism of the lens holder.

FIGS. 9A and 9B are a plan view and a front view of a holder support mechanism.

FIG. 10 is a diagram illustrating an operation of holding a lens by a holder support mechanism.

FIG. 11 is a diagram showing an operation of holding a lens by a holder support mechanism.

FIGS. 12A and 12B are diagrams showing a centering operation of a lens holder by a centering mechanism.

13A and 13B are diagrams showing delivery of a lens holder to a holder holding device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Lens, 2 ... Lens holder, 3 ... Elastic seal, 20
... ABS device, 21 ... Base, 22 ... Holder transfer device, 2
3 Holder holding device, 24 Seal supply device, 25 Lens supply device, 26 Lens meter, 28 Holder supply mechanism, 29 Holder support mechanism, 30 Chute, 31
Cassette, 35: Pin for preventing falling off, 38: Shutter mechanism, 43: Stage, 48A, 48B: Holder hand,
53 ... Centering mechanism, A1, A2, A3 ... End position, A4
… Holder mounting position.

Claims (2)

[Claims] 1. A holder supply mechanism for supplying a plurality of types of lens holders having lens holding surfaces having different curvatures according to the curvature of a convex lens surface of a lens for each type, and a holder supply mechanism for supplying the lens holders. A holder supporting mechanism for receiving and supporting and centering the lens holder, wherein the holder supply mechanism is provided at a plurality of chutes arranged side by side for each type of lens holder and at the end portions of these chutes. A shutter mechanism that normally closes the discharge port of the chute and opens the discharge port to discharge the first lens holder by driving according to a supply signal; and the holder support mechanism includes a holder mounting position. And a stage reciprocating between the end positions of the chutes and a holder provided on the stage and holding a lens holder supplied from the chutes. When, and a centering mechanism for centering the lens holder held by the holder hand, lens layout block apparatus characterized by. 2. A lens layout / block device according to claim 1, wherein a cassette accommodating the lens holder is mounted on the chute, and the lens holder is normally locked near the discharge opening inside the cassette. A layout block device for a lens, wherein a pin for preventing the lens holder from opening and releasing the lens holder when mounted on the chute is provided.