JP3275147B1 - How to attach elastic seal to lens holder - Google Patents

Abstract

Abstract: PROBLEM TO BE SOLVED: To automatically attach an elastic seal to a lens holder used for edge trimming of a lens to improve workability. An elastic seal (3) is provided by a seal supply device (2).
Is supplied to the sticking position A5. The elastic seal 3 is loaded in the tape loading section 63 in the form of a seal tape 62 wound in a roll shape and covered with the backing paper 60 and the protective paper 61, and is conveyed in a state where the protective paper 61 is peeled off by driving of the motor 86. . At the sticking position A5, the sensor 108 detects the front edge of the positioning hole 69 of the backing sheet 60,
After the seal tape 62 has been fed for a predetermined time from the detection, the conveyance is stopped. The stop position is determined as the sticking reference position of the elastic seal 3, and the lens holder 2 is pressed against the elastic seal 3 from above to stick.

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.
The present invention relates to a block device, and more particularly, to a method of attaching an elastic seal to a processing jig.

[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, the conventional layout of the lens and the block of the lens by the lens holder, which are the pre-processes for the edging of the lens, are performed by a worker using a dedicated device. I was However, such operations are inefficient and have low productivity, and are a major obstacle to labor saving. In particular, since the worker attaches an elastic seal to the lens holder so as not to damage the lens, and the lens is held by this seal,
The sticking work is cumbersome, and it takes time to stick the pieces exactly at the center, and there is a problem that the sticking position varies. Also, if your finger touches the adhesive applied to the elastic seal, the adhesive strength of that part will decrease,
It is necessary to pay sufficient attention to the handling of the elastic seal, and there is a problem that the burden on the operator is large.

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 an object of the present invention is to provide a layout and block device used for performing edge edging of a lens. An object of the present invention is to provide a method of attaching an elastic seal to a lens holder, which can automatically attach a seal and improve workability and work efficiency.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides an elastic seal on a backing sheet having positioning holes formed at a predetermined pitch with its center hole aligned with the positioning hole. A sealing tape supply device having a transport mechanism for transporting a seal tape in which the surface of the mount and the elastic seal are covered with protective paper at a predetermined feed speed with the protective paper peeled to a seal sticking position, A holder holding device for holding the lens holder up and down and rotatably in a horizontal plane. The holder holding device conveys the lens holder to the seal sticking position and lowers the lens holder, thereby forming the elastic seal. A method of attaching an elastic seal to a lens holder to be pressed and attached,
When transporting the seal tape to the seal sticking position,
After detecting the leading edge of the positioning hole of the backing paper by a sensor, and sending the sealing tape for a predetermined time from the time of the detection,
Stop the conveyance of the seal tape, position the position as the sticking reference position of the elastic seal, drive-control the holder holding device based on the sticking reference position information, and press the lens holder against the elastic seal. It is to stick.

In the present invention, the seal tape stops when a predetermined time has elapsed after the sensor detects the leading edge of the positioning hole, and this stop position is defined as the sticking reference position of the elastic seal. For example, the sensor detects the leading edge of the positioning hole, and then conveys and stops by a distance corresponding to the radius of the positioning hole, so that the center of the elastic seal matches the center of the sticking position of the seal, and the sticking is performed. It is positioned as the arrival reference position. Then, when the center of the lens holder is made to coincide with the sticking reference position and pressed against the elastic seal, the elastic seal is stuck to a predetermined position accurately without causing a positional shift with respect to the lens holder.

[0010]

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, and FIG. FIG. 7 is a front view of the sealing tape supply device, and FIG.
FIG. 9 is a diagram showing a feed roller, FIG. 10 is a plan view showing a sticking position of a seal and its vicinity, FIG.
1 is a cross-sectional view of a seal sticking position, FIG. 12 is a plan view and a side view of a seal peeling mechanism, and FIG. 13 is a view showing a seal tape.

First, the structure and the like of a lens and a lens holder processed by an ABS device for a single focus lens are shown in FIGS.
It will be described based on. 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.

The type of the lens 1 is one lens power D
(Diopter) is infinite due to the combination of the convex curve and the concave curve, and is actually determined in consideration of optical aberration and inventory management. Specifically, by adopting a lens design in which the types of convex curves are reduced and the concave curves are different, for example, a progressive multifocal lens is prepared from about 8 types of curves from 2 curves to 9 curves. Generally has a wide corresponding frequency range, so for example, 1 from 0 curve to 11 curve
Two types may be prepared. 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, the type of lens power is determined only by the convex curve D1. 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.

A lens holder 2 holds the convex lens surface 1a of the lens 1 via an elastic seal 3. As the lens holder 2, it is most desirable to use a dedicated lens for each lens having a different lens power D in order to stably hold the lens 1. However, if that is the case, the number of types of the holder itself is significantly increased. 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 9 are prepared in advance and selected according to the convex curve. To use. Specifically, in the case of 12 types of single focus lenses from curve 0 to curve 11, there are three lens groups, for example, a first lens group of 0 to 3 curves, and a fourth lens group of 4 to 6 curves according to the large, medium, and small curves. By classifying into two lens groups and a third lens group having a curve of 7 to 11 and preparing three types of lens holders 2 having different curvatures of the lens holding surfaces 9 corresponding to these lens groups, the common lens holder 2 It is trying to make it.

Such a lens holder 2 is formed of a metal such as stainless steel in a flanged cylindrical body, so that the fitting shaft 4 and the outer periphery of the fitting shaft 4 are shifted toward the front end and the front end. And a flange 5 and a lens holding portion 6 provided integrally with each other. The fitting shaft 4 has a length of, for example, 35 m.
m, outer diameter is about 14mmφ, and hole diameter of center hole 7 is 10m
It is about mφ.

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. 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. Since the radius of curvature of the lens holding surface 9 differs for each of the first, second, and third lens groups as described above, three types of lens holders 2 are prepared.

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 four, seven, and eleven curves are prepared for the lens holding surface 9, and the lens holder having four curves is set to zero.
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.

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 seal 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 storing 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 identifying 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 lens holder 2 is formed. 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 0.5-0.
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, a schematic configuration of the ABS device for a single focus lens will be described with reference to FIGS. A for single focus lens
The BS device 20 is installed adjacent to the edging device, and includes a holder transfer device 22 provided on a base 21;
A holder holding device 23, a sealing tape supply device 24,
A batch system that includes a lens supply device 25, a lens meter 26, and the like and randomly processes sequentially 12 types (0 to 11 curves) of single focus lenses having different convex curves 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 comprises three lens holders 2 arranged in parallel in the width direction at an angle (eg, 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. 4). 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.

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 31 and is supported by the holder supporting mechanism 29. The shutter mechanism 31 includes a pair of stopper pins 32 for locking the first lens holder 2 by normally closing the discharge port 30a of the chute 30, and an air cylinder 33 for vertically moving the stopper pins 32. The lens holder 2 is discharged from the chute 30 by driving the air cylinder 33 according to a supply signal from the control unit.

The holder support mechanism 29 is disposed so as to face the end of the chute 30, and the ABS device 2
A stage 36 is provided which is movable in the front-rear direction 0 (the direction of the arrow Y in FIG. 5) and reciprocates between the end positions A1, A2, A3 of the chutes 30 and the holder mounting position A4. The stage 36 is movably held by a pair of left and right rails 37 and a ball screw 38 installed on the base 21. When the ball screw 38 is rotated by the drive of the drive motor 46, the rail 37 and the ball screw It is configured to move along. At the terminal positions A1, A2, A3 of the chutes 30, the terminal portions 30b of the chutes 30 are positioned.

A stopper 41 for receiving the lens holder 2 supplied to the end portion 30b of the chute 30 and a pair of holder hands 42A and 42B for supporting the lens holder 2 are provided on the upper surface of the stage 36. An air cylinder (not shown) for operating the holder hands 42A, 42B in a direction in which the holder hands 42A, 42B approach and separate from each other is provided. Such a stage 36 holds the lens holder 2 by the holder hands 42A and 42B,
After being transferred to the holder mounting position A4 and centered by a centering mechanism (not shown), the holder holding device 23
Of the lens holder 2 is performed.

When the holder holding device 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 the lens holder 2 The lens 1 is held via an elastic seal 3. Such a holder holding device 23 includes a rotating arm 44, a clamp device 45 attached to the tip of the rotating arm 44, a driving mechanism (not shown) for rotating the rotating arm 44, and a clamp device. Drive mechanism (not shown) for moving 45 up and down
Etc. are provided.

The rotation arm 44 is configured to be rotated about a rotation center O in a horizontal plane. The clamp device 45 moves the holder mounting position A4 and the seal attaching position A by the rotation of the rotation arm 44.
5, lens holding position A6 and holder transfer position A7
The drive is controlled so as to reciprocate between them. Therefore, the clamp device 45, 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 centering on the rotation center O of the rotating arm 44. ing.

In FIG. 6, the holder mounting position A4
Is a position where the clamp device 45 receives and holds the lens holder 2 from the holder support mechanism 29, from which the sticking position A5 is shifted 120 ° in the counterclockwise direction, the holder transfer position A7 is shifted 230 °, The lens holding position A6 is shifted by 270 °. Seal sticking position A5
Is the lens holder 2 held by the clamp device 45
This is the position where the elastic seal 3 is attached. The lens holding position A6 is a position at which the lens 1 is held by the lens holder 2 held by the clamp device 45 via the elastic seal 3. The holder transfer position A7 is located at the lens holder 2 (the clamp device 4) holding the lens 1.
5) is transferred to a transfer robot for supplying the edging apparatus. A standby position A8 for holding the clamp device 45 is provided between the holder mounting position A4 and the lens holding position A6.

When the clamp device 45 moves to a position above the holder mounting position A4 and stops, the clamp device 45 is lowered and the lens holder 2 held by the holder support mechanism 29 is moved downward.
Is controlled so as to receive and hold the data. Further, when the lens holder 2 is received from the holder supporting mechanism 29, the elastic arm 3 is moved to the position above the sticking position A5 by the rotation of the rotating arm 44 and the elastic seal 3 is attached 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.

The lens supply device 25 includes two guide rails 47, a Y table 49 movable in the Y-axis direction by a ball screw 48, and two guide rails 50 and a ball screw 51 on the Y table 49. An X table 52 that is movable in the X-axis direction by being installed through
The X table 52 includes a Z table 53 that is movable in the Z-axis direction and a drive motor (not shown) that drives these tables. Further, the Z table 53 includes a pair of left and right hands 54A and 54B, and is configured to hold four outer peripheral edges of the lens 1 supplied to the lens supply device 25 by these hands.
When the pair of hands 54A and 54B receive and hold the lens 1 supplied to the lens supply device 25, the pair of hands 54A and 54B convey the lens 1 to the lens meter 26 and measure the lens. When the measurement is completed, the lens 1 is transported to the lens holding position A6 and mounted on the lens support.
The lens holder 2 held by 5 holds the lens 1. During this time, the height of the concave lens surface 1b of the lens 1 is measured.

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

At the lens holding position A6, when the lens holder 2 holds the inspected lens 1, the lens holder 2 is transferred to the holder transfer position A7 and stopped. When the lens 1 is removed from the clamp device 45, the edge is moved by an appropriate transfer robot. It is transported to the processing device. 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.

Next, a detailed configuration of the sealing tape supply device 24 will be described with reference to FIGS. The seal tape supply device 24 is for intermittently supplying the elastic seal 3 to the seal attaching position A5 in response to the supply of the lens holder 2 by the holder transport device 22, and sandwiches the holder support mechanism 29. And is arranged so as to face the holder supply mechanism 28.

As shown in FIG. 13, the elastic seal 3 supplied to the seal sticking position A5 is a tape in the form of a seal tape 62 in which the elastic seal 3 is covered with a mount 60 and a protective paper 61 and wound in a roll shape. It is loaded into the loading section 63 (FIG. 7). The mount 60 has a width of 32 mm, and a positioning hole 69 is formed at the center in the width direction at a pitch of 24 mm. The elastic seal 3 is attached to the positioning hole 69 so that the center hole 70 is aligned. The positioning hole 69 and the center hole 70 of the elastic seal 3 have the same hole diameter (8 mmφ). The protective paper 61 has the same width as the mount 60.

The seal tape 62 is wound around a spool 71, and each end of a shaft 72 has a pair of opposed side plates 73 forming the tape loading section 63.
And is supported by being inserted into and removed from above in a bearing hole 74 formed therein. Further, the pair of left and right side plates 73 includes a protective paper peeling mechanism 75 for peeling the protective paper 61 from the backing paper 60,
A feed roller 76 for feeding the seal tape 62 from which the protective paper 61 has been peeled off is provided. The protective paper peeling mechanism 75 is rotatably disposed between a first roller 78 disposed above the bearing hole 74 by a support member (not shown) and a rear end of the pair of side plates 73. The protective paper 61 peeled off from the seal tape 62 is attached to these rollers 78, 79, and is dropped by its own weight when the seal tape 62 is fed.
The feed roller 76 is rotatably supported by a bearing hole 80 formed in the upper surface on the front end side of the pair of side plates 73,
The lower surface (the lower surface of the mount) of the seal tape 62 from which the protective paper 61 has been peeled off is attached.

Further, a long hole 82 is formed in the side plate 73 of the pair of side plates 73 on the front side of the apparatus, and the remaining amount of the seal tape 62 is detected in the long hole 82. Sensor 83 is provided. The long hole 82 is formed in the radial direction of the seal tape 62 and has a length longer than the difference between the maximum diameter and the minimum diameter of the seal tape 62, one end of which is located near the outer periphery of the spool 71, and the other end of which is sealed. It is located outside the maximum diameter of the tape 62.
The sensor 83 for detecting the remaining amount of tape is attached to the end of the long hole 82 on the spool 71 side.
When the remaining amount becomes a certain amount, it is turned on to detect the remaining amount, and the detection signal is sent to the control unit.

On the left side of the tape loading section 63, there is provided a tape transport mechanism 85 for intermittently sending out the seal tape 62 loaded in the tape loading section 63 and supplying it to the seal sticking position A5. . The tape transport mechanism 85 includes a stepping motor 86 mounted on the lower surface side of the base 21, a gear 88 to which rotation of the motor 86 is transmitted via a timing belt 87, a pressing roller 89, and the like. The used mount 60 is pressed against the gear 88 by a roller 89 at a predetermined pressure. Therefore, when the gear 88 and the pressing roller 89 are rotated in the tape feeding direction by the driving of the stepping motor 86, the seal tape 62 is fed out from the tape loading section 63. Further, the tape transport mechanism 85 is provided with a mounting sheet feeding roller 9 rotatably disposed above the base 21.
0 is provided. Below the base 21, the gear 8
A mount storage unit 91 for collecting the used mount 60 guided downward by the pressing roller 8 and the pressing roller 89 is provided.

The mounting sheet storage section 91 is formed by a metal plate 92 such as stainless steel and the lower surface of the base 21. The metal plate 92 is formed by bending to include a curved portion 92a that is curved in an arc shape and an inclined portion 92b that extends backward from the lower end of the curved portion 92a and that is inclined backward. The upper end of the portion 92a is located below the pressing roller 89, and a tape 93 for facilitating sliding of the mount 60 is adhered to the entire surface.

A box-shaped conveyance path forming member 96 is provided on the upper surface of the base 21, and the center of the upper surface forms a seal conveyance path 97 for the seal tape 62. On both sides of the seal conveying path 97, there are provided inverted L-shaped tape guides 98 (FIGS. 10 and 11) for guiding both ends in the width direction of the seal tape 62. The front part of the seal conveying path 97 is the seal sticking position A5. At this position, both ends of the seal tape 62 in the width direction of the backing sheet 60 are pressed against the seal conveying path 97 to prevent lifting.
00 is provided. The pressing roller 100 has a pair of bearings 101, traverses the seal conveying path 97, and has both ends urged downward by a tension coil spring 102 to convey the mount 60 by the outer race of the bearing 101. It is pressed against the upper surface of the path forming member 96. The pair of bearings 101 are mounted on the mount 60.
This is used to reduce the frictional force between the elastic seal 3 and the pressing roller 100 at a larger interval than the outer diameter of the elastic seal 3 so as to contact only the end of the backing paper 60 so as to obtain a smooth conveyance of the seal tape 62. ing.

In FIG. 11, the sticking position A5
, An elastic member 104 such as rubber is provided via a metal plate 105. The upper surface of the elastic member 104 is flush with the upper surface of the transport path forming member 96 and forms a part of the seal transport path 97. The outer race of the bearing 101 is in contact with the upper surface on the tape loading section 63 side. . In addition, a circular hole 106 is formed through substantially the center of the elastic member 104. This hole 106 has the same hole diameter as the center hole 70 of the elastic seal 3, and the center is the seal sticking position A.
Coincides with the center of 5. Further, a hole 107 having the same diameter as the hole 106 is formed through the metal plate 105 so as to penetrate therethrough.
Is provided.
The optical sensor 108 moves the elastic seal 3 to the sticking position A5.
ON when the front edge 69a of the positioning hole 69 (the hole edge on the tape transport side) is detected,
When the detection signal is sent to the control unit, the control unit stops the stepping motor 86 after a predetermined time. The time from when the optical sensor 108 detects the leading edge 69a of the positioning hole 69 to when the control unit sends a signal to the stepping motor 86 to stop the stepping motor 86 is determined by the time when the sealing tape 62 This is equal to the time required to move by the radius, whereby the elastic seal 3 is accurately positioned at the center of the sticking position A5 and stopped. This stop position is set as the sticking reference position of the elastic seal 3.

Immediately after the sticking position A5, when the lens holder 2 is pressed against the elastic seal 3, the mount 60
A seal peeling mechanism 110 for peeling the elastic seal 3 from the seal is provided. As shown in FIG. 12, the seal peeling mechanism 110 moves the seal conveying path 9 immediately after the sticking position A5.
And a pair of holding members 111A and 111B arranged to face upward and downward with the first holding member 8 interposed therebetween, and a first air cylinder for operating these holding members 111A and 111B in a direction approaching and separating from each other in synchronization. 112, and a second air cylinder 113 which lowers these holding members together with the first air cylinder 112 by a fixed amount after the holding members 111A and 111B hold the mount 60. The holding members 111A and 111B are formed of vertically symmetrical plates, and a groove 114 is formed in the center of the holding surface. The first air cylinder 112 includes a bracket 11
5 is fixed. The second air cylinder 113 is fixed to a bracket 116 provided on the base 21,
The bracket 115 is attached to the mover 113a by the set screw 11
7 fixed.

Further, the sealing tape supply device 24 comprises:
In addition to the optical sensor 108 described above, a reflective optical sensor 120 that detects whether or not the elastic seal 3 is attached to the lens holder 2 itself and the lens holding surface 9 of the lens holder 2.
(FIG. 11).

Next, a method of attaching a seal to the lens holder will be described with reference to FIG. The seal tape 62 from which the protective paper 61 has been peeled off is conveyed at a constant speed to the seal sticking position A5 by driving the stepping motor 86 (step 200). The seal tape 62 is in the sticking position A5
And the front edge 69 a of the positioning hole 69 of the mount 60.
Is matched with the sensor 108, the sensor 108 is turned on to detect the positioning hole 69 (step 201), and sends a detection signal to the control unit. Upon receiving the detection signal from the sensor 108, the control unit stops the transport of the seal tape 62 by the stepping motor 86 after a lapse of time set by the hole diameter, the rotation speed of the motor, and the like (Step 202). By this stop, the position of the positioning hole 69 which coincides with the sensor 108 is positioned as the sticking reference position of the elastic seal 3 corresponding to the hole.
The set time is determined by the sensor 108 when the positioning hole 6
This is the time required for the center of the hole 69 to move to the center of the sensor 108 after the detection of the leading edge 69a.

When the elastic seal 3 is positioned at the sticking reference position and stopped, the holder supply device 23 rotates the turning arm 44 based on the sticking reference position information from the control unit to hold the lens holder 2. The clamping device 45 is moved above the sticking position A5 and stopped. Then, the protrusion 10 is cut into the elastic seal 3 by lowering the clamp device 45 and pressing the lens holding surface 9 of the lens holder 2 against the upper surface of the elastic seal 3 (step 203). When the lens holder 2 is pressed against the elastic seal 3, the first air cylinder 112 (FIG. 12) drives the pair of holding members 111A and 111B to move in the direction approaching each other to hold the end of the backing sheet 60 ( Step 2
04) Then, the bracket 115 is lowered by a predetermined amount by driving the second air cylinder 113. For this reason, the pair of holding members 111A and 111B are also lowered by a predetermined amount to lower the holding board 60 (step 205). When the clamp device 45 is raised and returned in synchronization with this, the elastic seal 3 adhered to the lens holding surface 9 of the lens holder 2 is peeled off from the backing paper 60, and thus the elastic seal 3 is adhered to the lens holder 2. Ends (step 20).
6).

Thereafter, the clamp device 45 is moved above the lens holding position A6 by the rotation of the rotation arm 44. On the way, the sensor 120 is mounted on the lens holder 2.
It is detected whether or not the elastic seal 3 is stuck on (steps 207 and 208). When the elastic seal 3 is not attached to the lens holder 2, the control unit sends a sticking signal to the holder supply device 23 in response to a signal from the sensor 120, and the sticking operation of the elastic seal is performed again.

When the lens holder 2 on which the elastic seal 3 is adhered moves to the lens holding position A6 and stops (step 209), the elastic seal 3 adhered to the lens holder 2 is removed by the lowering of the clamp device 45. The lens 1 supplied to the lens holding position A6 is pressed and brought into close contact (step 210). Therefore, the lens 1 is held by the lens holder 2 via the elastic seal 3. At this time,
The lens holder 2 is rotated by a predetermined angle in advance based on the calculated value at the time of measuring the lens, and the elastic seal 3 is pressed against the lens 1 (step 211).

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, a series of processes such as supply of the lens holder 2, centering, supply of the elastic seal 3 and sticking to the lens holder 2, holding of the lens 1 by the lens holder 2, and measurement of the lens 1 are all automatically performed. Therefore, the burden on the worker can be remarkably reduced, work efficiency and productivity can be improved, and labor can be saved. Further, after positioning the elastic seal 3 at the sticking reference position, the sealing tape supply device 24 conveys the lens holder 2 above the sticking reference position and lowers the lens holder 2 so that the lens holder 2 elastically moves. Since the elastic seal 3 is pressed and adhered to the seal 3, the elastic seal 3 can be accurately adhered to the lens holding surface 9 of the lens holder 2. Therefore, it is not necessary for the operator to stick the lens holder 2 one by one, and the work efficiency can be improved.

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 the present invention can be applied to an ABM device for a multifocal lens.

[0053]

As described above, according to the method for attaching an elastic seal to a lens holder according to the present invention, a seal tape is conveyed to a position where the seal is attached, a sensor detects the leading edge of the positioning hole of the mount, and After sending the seal tape for a predetermined time from the detection, the conveyance of the seal tape is stopped, the position is determined as the sticking reference position of the elastic seal, and the drive control of the holder holding device is performed based on the sticking reference position information. Then, the lens holder is pressed against the elastic seal to be adhered, so that there is no need for an operator to perform an operation of attaching the elastic seals to the lens holder one by one,
The burden on the worker is remarkably reduced, and work efficiency and productivity can be improved and labor can be saved. Also,
It does not stain or damage the lens.

[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 ABS device.

FIG. 6 is a diagram showing a positional relationship.

FIG. 7 is a front view of the sealing tape supply device.

8 is a view as viewed in the direction of arrows AA in FIG. 7;

FIG. 9 is a diagram illustrating a feed roller.

FIG. 10 is a plan view showing a sticking position of a seal and its vicinity.

FIG. 11 is a cross-sectional view of a seal sticking position.

FIG. 12 is a plan view and a side view of the seal peeling mechanism.

FIG. 13 is a view showing a seal tape.

FIG. 14 is a flowchart showing an attaching operation of an elastic seal.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Lens, 2 ... Lens holder, 3 ... Elastic seal, 20
... ABS device, 22 ... Holder transfer device, 23 ... Holder holding device, 24 ... Seal tape supply device, 25 ... Lens supply device, 26 ... Lens meter, 60 ... Mounting paper, 61 ... Protective paper, 62 ... Seal tape, 63 ... Tape loading section, 69 ...
Positioning hole, 70: center hole, 75: protective paper peeling mechanism,
85: Tape transport mechanism, 97: Seal transport path, 108:
Sensor, 110: seal peeling mechanism, 111A, 111B
.., A holding member, 112, a first air cylinder, 113, a second air cylinder, A4, a holder mounting position, A5, a sticking position, A6, a lens holding position, A7, a holder transfer position.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B24B 9/14 B24B 13/005 G02C 13/00

Claims (1)

(57) [Claims] 1. An elastic seal is attached to a mount having positioning holes formed at a predetermined pitch so that the center hole of the elastic seal coincides with the positioning hole, and the surfaces of the mount and the elastic seal are protected by protective paper. A seal tape supply device equipped with a transport mechanism that transports the covered seal tape to the seal sticking position at a predetermined feed speed with the protective paper peeled, and a lens holder that can move up and down and rotate freely in a horizontal plane. A holder holding device for holding the lens holder. The holder holding device conveys the lens holder to the seal sticking position and lowers the lens holder, thereby pressing the lens holder onto the elastic seal and sticking the lens holder. When the seal tape is transported to the seal sticking position,
After detecting the leading edge of the positioning hole of the backing paper by a sensor, and sending the sealing tape for a predetermined time from the time of the detection,
Stop the conveyance of the seal tape, position the position as the sticking reference position of the elastic seal, drive-control the holder holding device based on the sticking reference position information, and press the lens holder against the elastic seal. A method of attaching an elastic seal to a lens holder, which is characterized by attaching.