JP2011031331A - Lens cleaning apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lens cleaning apparatus capable of continuously and efficiently cleaning a plurality of lens. <P>SOLUTION: The lens cleaning apparatus includes: a lens rotating mechanism 2 for rotating a lens (spectacle lens L) around an optical axis thereof; a wiping mechanism 3 that has a pair of pressure pads 13 facing the rotating lens from both sides of front and rear and wipes the lens from both sides of front and rear; a wiping sheet 4 interposed between the respective pressure pads 13 and the lens; and a sheet feed mechanism 6 for feeding the wiping sheet 4 to a sheet recovery portion 15 through the pair of pressure pads 13 from a sheet feeder 14 along a sheet feed path 5. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a lens cleaning device for wiping a lens such as an eyeglass lens.

Conventionally, using a roller as a driving source, three rollers that rotate the lens around its outer surface (edge), a pair of wipes that wipe the front and back surfaces of the lens, and a pressure cylinder (air cylinder). Each arm is supported by a pair of arms having a parallel link mechanism that is moved and pressed against the lens, and two fixed pairs of each parallel link mechanism, and each wiping dish is circularly moved in a horizontal plane via each arm. A lens wiping device comprising a rotating cylinder (
A lens cleaning device) is known (see Patent Document 1).
In this lens cleaning device, while the wiping dish is pressed by a pressing cylinder against a lens rotated by three rollers, it is moved in an arc shape toward the outside of the lens by a rotating cylinder, and the contact point between the wiping dish and the lens surface is continuously provided. By changing the distance between the two lens surfaces, the front and back lens surfaces are wiped off satisfactorily.

Japanese Patent Laid-Open No. 2003-039295

In such a lens cleaning device, when a plurality of lenses are continuously wiped, there is a problem that dirt accumulates on the wiping tray and the dirt is reattached to the lens to be wiped. In order to prevent such redeposition of dirt, the wiping tray must be frequently replaced, which causes a problem that the working efficiency of lens cleaning is lowered.

It is an object of the present invention to provide a lens cleaning device capable of continuously and efficiently cleaning a plurality of lenses.

The lens cleaning device of the present invention has a lens rotation mechanism that rotates the lens around its optical axis, and a wiping mechanism that has a pair of pressing pads facing the rotating lens from both the front and back sides, and that wipes the lens from both the front and back sides. A wiping sheet interposed between each pressing pad and the lens, and a sheet supply mechanism that sends the wiping sheet from the sheet supply unit to the sheet collection unit via the pair of pressing pads along the sheet feeding path, It is provided with.

In this case, the sheet feeding path includes a feeding path from the sheet supply unit to one pressing pad, a bypass path that bypasses the lens from one pressing pad to the other pressing pad, and a sheet recovery from the other pressing pad. It is preferable to have a delivery path leading to the section.

According to these configurations, since the wiping sheet is sent from the sheet supply unit to the sheet collection unit via the pair of pressing pads by the sheet supply mechanism, the same portion of the sheet surface is repeatedly used for the lens. Therefore, cleaning can be performed by always contacting a new wiping surface. For this reason, it can prevent that the foreign material once wiped off adheres to a lens, and can give priority to uniform press performance in a press pad. Accordingly, it is not necessary to replace the pressing pad, and the lens wiping work efficiency can be improved by using a long wiping sheet. Furthermore, since both surfaces of the lens surface can be wiped simultaneously, the time required for the wiping operation can be greatly shortened.

In this case, the sheet supply mechanism is provided in the sheet supply unit, feeds out a wiping sheet wound in a roll shape, path changing means for changing the path of the wiping sheet along the sheet feeding path, and sheet recovery It is preferable to have a take-up reel that is provided in the section and takes up the sent wiping sheet.

According to this configuration, a long wiping sheet can be efficiently supplied to the lens.

In this case, it is preferable that the path changing unit has a sheet reversing mechanism that faces the detour path and reverses the wiping sheet.

Further, the sheet reversing mechanism has a pair of path changing rollers that hang the wiping sheet in a reversed state, and a holding roller that holds the twisted state of the wiping sheet between the pair of path changing rollers. Preferably it is.

According to these configurations, by inverting the wiping sheet, both surfaces of the wiping sheet can be used for lens cleaning. As a result, the wiping sheet can be used without waste, and a significant cost reduction can be achieved.

In this case, a cleaning liquid supply mechanism that drops the cleaning liquid on the wiping sheet
Furthermore, it is preferable to provide.

According to this configuration, the cleaning liquid serves as a wetting agent and promotes the adhesion of foreign matter to the wiping sheet, so that efficient cleaning can be performed without damaging the lens.

In this case, it is preferable to further include a wiping movement mechanism that moves at least one of the lens rotation mechanism and the wiping mechanism so that the pair of pressing pads move relative to the lens in the radial direction.

According to this configuration, it is possible to wipe the entire area of the lens to be wiped without causing unwiping.

In this case, each pressing pad is preferably formed like a rubber balloon, and further includes a compressed air supply mechanism that supplies compressed air to the pair of pressing pads.

According to this configuration, the pressing pad is deformed by the pressing force, and the wiping sheet can contact with the gap without following the shape of the lens via the pressing pad. This allows the lens to be cleaned without wiping away.

  In this case, the lens is preferably a spectacle lens.

According to this structure, the foreign material adhering to the spectacle lens can be removed and cleaning can be performed.

It is a top view of the lens cleaning apparatus which concerns on this embodiment. It is a side view of the lens cleaning device concerning this embodiment.

Hereinafter, a lens cleaning device according to the present invention will be described with reference to the accompanying drawings.
This lens cleaning device is for wiping off foreign matters such as abrasives adhering to the surface of the spectacle lens after being polished.

As shown in FIGS. 1 and 2, the lens cleaning device 1 includes a lens rotating mechanism 2 that rotates the spectacle lens L in a plane, and a wiping mechanism having a pair of pressing pads 13 that wipes both the front and back surfaces of the spectacle lens L at the same time. 3 and a wiping sheet 4 that is interposed between each pressing pad 13 and the spectacle lens L and wipes off foreign matter adhering to the front and back surfaces of the spectacle lens L;
A sheet supply mechanism 6 that sends the wiping sheet 4 along the sheet feed path 5 from the sheet supply unit 14 to the sheet collection unit 15 via the pair of pressing pads 13, and a cleaning liquid supply mechanism that drops the cleaning liquid onto the wiping sheet 4 7, a wiping movement mechanism 8 that moves the lens rotation mechanism 2 in a substantially radial direction with respect to the wiping mechanism 3, a machine base 9 that supports these mechanisms, and a control device 16 that performs overall control of the apparatus. Yes. In addition, the lens cleaning device 1 includes a carry-in / carry-out mechanism 11 that carries the spectacle lens L into and out of the lens rotation mechanism 2, and a discharge material robot 12 that discharges the spectacle lens L from the carry-in / carry-out mechanism 11. ing.

The eyeglass lens L transferred to the carry-in / carry-out mechanism 11 from the material-carrying material tray 17 (schematically illustrated by the small size) by the paper-carrying material robot 12 is carried into the lens rotating mechanism 2 by the carry-in / carry-out mechanism 11. Is passed on. On the other hand, the pair of pressing pads 13 with the wiping sheet 4 interposed therebetween contact the eyeglass lens L delivered to the lens rotating mechanism 2 from above and below.
In this state, the eyeglass lens L is rotated in the horizontal posture by the lens rotation mechanism 2, and at the same time, the wiping sheet 4 is fed by the sheet supply mechanism 6. Further, in this state, the wiping movement mechanism 8 moves the spectacle lens L together with the lens rotation mechanism 2 in the radial direction, so that the entire area of the front and back surfaces of the spectacle lens L is wiped simultaneously. When the wiping operation of the eyeglass lens L is completed, these mechanisms are stopped and the loading / unloading mechanism 11 faces the lens rotation mechanism 2. Here, the carry-in / carry-out mechanism 11 receives the eyeglass lens L from the lens rotation mechanism 2, conveys it to the position of the supply material robot 12, and delivers it to this. Then, the supply material robot 12 transfers the received spectacle lens L to the supply material tray 17.

As shown in FIG. 1, the material removal robot 12 is a horizontal articulated robot (scalar robot).
The eyeglass lens L on the material supply tray 17 is chucked (sucked) by a collet 19 provided at the tip of the robot arm 18 and is turned to be transferred (placed) to the loading / unloading mechanism 11. Further, with respect to the spectacle lens L that has been wiped away, the deburring material robot 12 receives the spectacle lens L from the carry-in / carry-out mechanism 11 in a procedure reverse to the above and transfers it to the deburring material tray 17. On the other hand, the loading / unloading mechanism 11 is composed of a direct-acting rodless cylinder, and a cylinder body 21.
And a mounting table 22 that is advanced and retracted by the cylinder main body 21. When the spectacle lens L is placed on the placement table 22 by the material removal robot 12, the cylinder body 21.
Is driven, and the spectacle lens L is moved forward and carried into the center position of the lens rotation mechanism 2. Also,
The carry-in / carry-out mechanism 11 receives the spectacle lens L from the lens rotation mechanism 2 in the reverse procedure, and carries it out to the position (home position) of the supply material robot 12 in the reverse procedure.

The lens rotating mechanism 2 includes a plurality of (four in the illustrated example) rolling contact rollers 23 that rotatably support the edge of the spectacle lens L, and one rolling contact roller 23 among the plurality of rolling contact rollers 23. Two roller advancing and retracting mechanisms 25 that support the roller driving mechanism 24 that rotates and the adjacent two rolling rollers 23 among the other three rolling rollers 23 so as to freely advance and retract in the radial direction of the eyeglass lens L, respectively. And a mechanism base 26 that supports these components. The lens rotation mechanism 2 that can be moved by the wiping movement mechanism 8 uses the position where the pair of pressing pads 13 come into contact with the center of the set spectacle lens L from above and below, that is, the wiping start position as the home position.

When the eyeglass lens L is carried into a position surrounded by the plurality of rolling rollers 23, the roller advance / retreat mechanism 25 is driven to advance the two rolling rollers 23 in the radial direction. As a result, the eyeglass lens L is chucked by the plurality of rolling rollers 23, and in this state, the eyeglass lens L rotates in the horizontal plane around the optical axis by driving the roller driving mechanism 24. A position away from the wiping start position may be the home position of the lens rotation mechanism 2. In this case, in the wiping operation, it is necessary to move the lens rotating mechanism 2 to the wiping start position by the wiping movement mechanism 8 after the eyeglass lens L is set.

The plurality of rolling rollers 23 are equally arranged in the circumferential direction, and are configured by three driven rollers 27 that are driven and rotated in a vertical posture, and one drive roller 28 that is driven and rotated in a vertical posture. Each driven roller 27 and the driving roller 28 are in contact with the edge of the spectacle lens L at four points, and stably rotate the spectacle lens L while pinching the spectacle lens L securely. Of the three driven rollers 27, the two driven rollers 27 are connected to the eyeglass lens L by the roller advance / retreat mechanism 25.
The one driven roller 27 is fixedly erected on the mechanism base 26.

Each rolling roller 23 has its roller shaft 29 installed in a vertical posture, and the roller body 31 has a first rolling contact portion 32 that rolls in contact with one edge of the lens edge and a second rolling contact with the other edge. And a rolling contact portion 33. The first rolling contact portion 32 is formed in a tapered shape, and the second rolling contact portion 3
3 is formed in the reverse taper shape with respect to the 1st rolling contact part 32, and is formed in the drum shape as a whole. When the first rolling contact portion 32 and the second rolling contact portion 33 apply the component forces, respectively, the spectacle lens L is located at a position where the component forces of the first rolling contact portion 32 and the second rolling contact portion 33 antagonize during rotation.
The position of is regulated. Each rolling roller 23 (roller body 31) is made of rubber, polyurethane, or the like in order to prevent the eyeglass lens L from being chipped or scratched.

The roller drive mechanism 24 includes a rotation drive motor 34 serving as a power source and a rotation drive motor 3.
A driving pulley 36 that is pivotally attached to the main shaft 35, a driven pulley 37 that is pivotally attached to the roller shaft 29 of the rolling roller 23, and a timing belt 38 that spans between the driving pulley 36 and the driven pulley 37. It is configured. The rotation drive motor 34 is composed of a speed control motor or a stepping motor, and can appropriately change the number of rotations of the eyeglass lens L. The driving roller 28 is a bearing block 3 provided on the mechanism base 26.
9, and is rotatably supported by the rotation drive motor 34. In response to the rotation of the driving roller 28, the eyeglass lens L rotates, and further, the three driven rollers 27 that are in contact with the eyeglass lens L rotate.

The roller advance / retreat mechanism 25 includes an air cylinder 41 with a slider that supports two adjacent driven rollers 27 out of the three driven rollers 27 so as to freely advance and retract in the radial direction. The air cylinder 41 includes two rolling rollers 2 including a driving roller 28.
3, the other two rolling contact rollers 23 are advanced and retracted, and the spectacle lens L can be attached and detached. The mechanism base 26 supports all of the roller advance / retreat mechanism 25, the roller drive mechanism 24, and the plurality of rolling rollers 23 on the mechanism base 26.

In addition, although the number of the rolling contact rollers 23 is arbitrary, it is preferable to have one or more drive rollers 28 and to arrange a total of 4 rolling contact rollers 23 at equal intervals. By installing the four rolling contact rollers 23, the spectacle lens L can be easily attached and detached, and devices and members that access the spectacle lens L can be appropriately arranged.

The wiping mechanism 3 includes a pair of pressing pads 13 installed so as to face each other up and down around the spectacle lens L, and a compressed air supply facility (not shown) that supplies compressed air to each pressing pad 13.
A pair of upper and lower rotating arms 42 holding the respective pressing pads 13 at the tips, a pair of upper and lower servo motors 43 for rotating each rotating arm 42 so that the pressing pad 13 is separated from and contacting the spectacle lens L, and a pair of And an apparatus frame (not shown) for supporting the servo motor 43 in a state where it is arranged up and down.

The pair of pressing pads 13 are attached to the tip of the rotating arm 42, and one is arranged so as to be in contact with the front surface of the spectacle lens L and the other is in contact with the rear surface of the spectacle lens L. Each pressing pad 13 is formed in a rubber balloon shape by an elastic material such as rubber, and its surface is covered with the wiping sheet 4. Further, the compressed air supply mechanism is provided with a pressing pad 13.
And an air valve (not shown) connected to the air pipe and an air valve (not shown) provided in the air pipe for controlling the air supply. Compressed air is supplied to each pressing pad 13 through an air pipe so that the inside becomes an appropriate pressure. In this state,
Since the pressure pad 13 pressed against the spectacle lens L is deformed following the shape of the spectacle lens L, the press pad 13 can be closely adhered to the spectacle lens L to be wiped off, and good cleaning without leaving any wiping can be performed. it can. In particular, the peripheral edge of the spectacle lens L can be wiped uniformly.

The pair of rotating arms 42 are arranged vertically symmetrically so as to sandwich the eyeglass lens L facing the wiping start position from above and below. Each rotating arm 42 has an arm main body 45 whose base end is fixed to the motor shaft 44 of the servo motor 43, and a force gauge 46 for measuring the pressing force of the pressing pad 13 attached to the tip of the arm main body 45. The pair of rotating arms 42 rotates the arm body 45 with the rotation of the motor shaft 44 by the servo motor 43, and pushes the pressing pad 13 attached to the tip of the arm body 45 to the eyeglass lens L via the wiping sheet 4. The front and back surfaces of the eyeglass lens L are wiped off.

The servo motor 43 includes a drive motor 47 serving as a drive source for rotating the motor shaft 44, an encoder (not shown) for detecting the rotation angle of the motor shaft 44, and a signal based on the calculation result of the control device 16. And a power converter (not shown) that converts the power into the power required for driving. The drive motor 47 is controlled based on the measurement signal from the force gauge 46 and the output signal from the encoder.

The cleaning liquid supply mechanism 7 is located above the feeding side of the wiping sheet 4 (feeding path 52).
And a cleaning liquid tank (not shown) and a dispenser (not shown) connected to the cleaning liquid tank. This dispenser faces the wiping surface of the wiping sheet 4, and in accordance with the feeding operation of the wiping sheet 4, cleaning liquid such as acetone and alcohol supplied from the cleaning liquid tank is supplied to the wiping sheet 4.
Dripping into. That is, the control device 16 drives the cleaning liquid supply mechanism 7 in synchronization with the sheet supply mechanism 6. The cleaning liquid dropped on the wiping sheet 4 serves as a wetting agent and prevents friction between the spectacle lens L and the wiping sheet 4, so that the wiping operation can be performed without damaging the spectacle lens L.

The wiping movement mechanism 8 is provided on the machine base 9 and slidably supports the mechanism base 26. The front and rear sliders 49 are fixed to the back surface of the mechanism base 26 and engage the guide rail 48. And a motor (not shown) that linearly moves the mechanism base 26 with the guide rail 48 as a guide. The guide rail 48 extends in the extending direction of the rotating arm 42, and the wiping movement mechanism 8 moves the lens rotating mechanism 2 together with the mechanism base 26 in the extending direction. That is, during the wiping operation, the wiping movement mechanism 8 moves the lens rotation mechanism 2 at the home position by a distance corresponding to the approximate radius of the eyeglass lens L in the material supply position direction. By this movement and rotation in the radial direction, both the front and back surfaces of the spectacle lens L can be wiped without being left behind. The wiping movement mechanism 8 is not the lens rotation mechanism 2 but the wiping mechanism 3.
The pair of pressing pads 13 may be moved relative to the eyeglass lens L in the radial direction by moving.

The control device 16 is composed of a personal computer (PC), and performs overall control of the entire lens cleaning device 1. Further, the control device 16 receives input of various parameters from the user using an input device such as a keyboard, and presents (notifies) the state of the lens cleaning device 1 to the user by output means such as a display or a speaker.

Next, the sheet supply mechanism 6 which is a characteristic part of the present invention will be described in detail. The sheet supply mechanism 6 includes a sheet supply unit 14 that supplies the wiping sheet 4, a sheet collection unit 15 that collects the wiping sheet 4 after the wiping operation, and a sheet collection unit 15 from the sheet supply unit 14.
Path changing means 51 constituting the sheet feeding path 5 of the wiping sheet 4 leading to The sheet feeding path 5 includes a feeding path 52 from the sheet supply unit 14 to the upper pressing pad 13, and a detour path 53 that bypasses the eyeglass lens L from the upper pressing pad 13 to the lower pressing pad 13. And a delivery path 54 from the lower pressing pad 13 to the sheet collecting unit 15.

The sheet supply unit 14 includes a supply reel 55 in which the wiping sheet 4 is wound in a roll shape,
And a feeding motor 56 for feeding and rotating the feeding reel 55. The feeding motor 56 feeds the wiping sheet 4 with tension, and is constituted by, for example, an induction motor. On the other hand, the sheet collection unit 15 includes a take-up reel 57 that takes up the wiping sheet 4 after the wiping operation, and a take-up motor 58 that takes up and rotates the take-up reel 57. The winding motor 58 winds up the wiping sheet 4 at a constant speed and tension, and is composed of, for example, a torque motor. The feeding motor 56 and the winding motor 58 rotate synchronously, and the wiping sheet 4 in a stretched state is
The sheet is fed from the sheet supply unit 14 to the upper pressing pad 13 via the feeding path 52, led to the lower pressing pad 13 via the detour path 53, and finally to the sheet collecting unit 15 via the feeding path 54. Into.

The route changing means 51 includes a first change roller 61 that changes the feeding route 52 from the sheet supply unit 14 toward the upper pressing pad 13, and a second change roller 62 that changes the route on the upstream side of the detour route 53. And a third change roller 63, a sheet reversing mechanism 59 interposed at the midpoint of the detour path 53, a fourth change roller 64 and a fifth change roller 65 that change the path on the downstream side of the detour path 53, and sending A sixth changing roller 66 that changes the path 54 from the lower pressing pad 13 toward the sheet collecting unit 15.

The first changing roller 61 and the second changing roller 62 change the path of the wiping sheet 4 so that the wiping sheet 4 being sent covers the lower surface of the upper pressing pad 13 in an arc shape. Similarly, the fifth changing roller 65 and the sixth changing roller 66 change the path of the wiping sheet 4 so that the wiping sheet 4 being sent covers the upper surface of the lower pressing pad 13 in an arc shape. The third changing roller 63 and the fourth changing roller 64 are arranged close to each other and change the path so that the wiping sheet 4 passing through the sheet reversing mechanism 59 circulates in a substantially “C” shape.

The sheet reversing mechanism 59 includes a pair of upper and lower reversing portion changing rollers 67 that hangs the wiping sheet 4 in a state where the front and back are reversed, and a holding roller that holds the twisted state of the wiping sheet 4 between the pair of reversing portion changing rollers 67. (Inclined pulley) 68. The pair of reversing part changing rollers 67 is arranged at a sufficient distance in the vertical direction, and the wiping sheet 4 is reversed between both reversing part changing rollers 67, that is, 180 °.
It is stretched over a twisted state. On the other hand, the holding roller 68 is composed of a pair of free rollers disposed at an intermediate position between the two reversing part changing rollers 67. The pair of free rollers has the form of a nip roller and guides the traveling of the wiping sheet 4 twisted at 90 °.

In the detour path 53, the wiping sheet 4 sent via the upper pressing pad 13
Is sent from the third change roller 63 to the sheet reversing mechanism 59, where the front and back are reversed,
Guided from the fourth change roller 64 to the lower pressing pad 13. Thereby, the wiping sheet 4 wipes the front surface and the back surface of the spectacle lens L with different wiping surfaces. Therefore, both surfaces of the wiping sheet 4 can be used without waste, and a significant cost reduction can be achieved. The number of holding rollers 68 can be set arbitrarily, and two or more holding rollers 68 may be set according to the twist angle of each part of the wiping sheet 4.

Here, the operation of the eyeglass lens L wiping operation (cleaning operation) will be briefly described.
First, the eyeglass lens L transferred from the discharge material tray 17 to the placement table 22 by the discharge material robot 12 is loaded into the lens rotation mechanism 2 by the loading / unloading mechanism 11 and delivered.
Thereafter, the user inputs a target pressing force F, which is an ideal pressing force of the pressing pad 13 against the spectacle lens L, using an input device such as a keyboard. This target pressing force F is preferably obtained experimentally in advance.

Next, the pair of rotating arms 42 are rotated by the drive motor 47, and the pressing pads 13 fixed to the tips of the respective rotating arms 42 are brought into contact with each other so as to be sandwiched from both surfaces of the eyeglass lens L. While the front and back surfaces of the spectacle lens L are pressed, the spectacle lens L is rotated in the horizontal plane by the lens rotation mechanism 2, and at the same time, the wiping sheet 4 is fed by the sheet supply mechanism 6. Each rolling contact roller 23 that grips the eyeglass lens L regulates the position of the eyeglass lens L at a position where the component forces of the first and second rolling contact portions 32 and 33 antagonize, so that the eyeglass lens L is placed in a specific plane. Rotate with high stability.

Further, the wiping sheet 4 fed out from the sheet supply unit 14 is fed along the sheet feeding path 5 while maintaining a constant speed and tension, and reaches the detour path 53 through one pressing pad 13. The wiping sheet 4 passes through the sheet reversing mechanism 59 disposed in the detour path 53 and is sent toward the other pressing pad 13 in a state where the front and back are reversed. At this time, the motor of the wiping movement mechanism 8 is driven to move the lens rotation mechanism 2 from the home position toward the material supply position. Thereby, the front and back both surfaces of the spectacle lens L are wiped off simultaneously without wiping away. When the lens rotating mechanism 2 moves a distance corresponding to the approximate radius of the spectacle lens L (radius from a position slightly beyond the center), the entire front and back surfaces of the spectacle lens L are wiped off, and the cleaning operation is completed.

After completion of the cleaning operation of the eyeglass lens L, these mechanisms are stopped, and the loading / unloading mechanism 11 faces the lens rotation mechanism 2. Here, simultaneously with the roller advance / retreat mechanism 25, the two rolling contact rollers 23 advance / retreat, and at the same time, the carry-in / out mechanism 11 receives the eyeglass lens L from the lens rotation mechanism 2 and conveys it to the position of the supply material robot 12. Pass to. Then, the supply material robot 12 transfers the received spectacle lens L to the supply material tray 17.

According to the above configuration, the wiping sheet 4 is removed from the sheet supply unit 1 by the sheet supply mechanism 6.
Since the sheet is sent from 4 through the pair of pressing pads 13 to the sheet collecting unit 15, cleaning can always be performed with a new wiping surface without repeatedly using the same portion of the spectacle lens L. Further, by inverting the front and back of the wiping sheet 4, both surfaces of the wiping sheet 4 can be used without waste, and a significant cost reduction can be achieved.

DESCRIPTION OF SYMBOLS 1 ... Lens cleaning apparatus 2 ... Lens rotation mechanism 3 ... Wiping mechanism 4 ... Wiping sheet 5 ... Sheet feed path 6 ... Sheet supply mechanism 13 ... Press pad 14 ... Sheet supply part 15 ... Sheet collection part 51 ... Path change means 52 ... Feed Route 53 ... Detour route 5
4 ... Delivery path 55 ... Delivery reel 57 ... Take-up reel 68 ... Holding roller L ...
Eyeglass lenses

Claims (9)

A lens rotation mechanism that rotates the lens around its optical axis;
A wiping mechanism having a pair of pressing pads facing both the front and back sides of the rotating lens, and wiping the lens from the front and back sides;
A wiping sheet interposed between each pressing pad and the lens;
A lens cleaning device, comprising: a sheet supply mechanism that supplies the wiping sheet from a sheet supply unit to the sheet collection unit via the pair of pressing pads along a sheet feeding path. The sheet feeding path is
A feeding path from the sheet supply unit to one of the pressing pads;
A detour path that bypasses the lens from the one pressing pad and reaches the other pressing pad;
The lens cleaning device according to claim 1, further comprising: a delivery path from the other pressing pad to the sheet collecting unit. The sheet supply mechanism is
A feeding reel provided in the sheet supply unit and for feeding out the wiping sheet wound in a roll;
Path changing means for changing the path of the wiping sheet along the sheet feeding path;
The lens cleaning device according to claim 2, further comprising: a take-up reel that is provided in the sheet collecting unit and takes up the sent wiping sheet. The lens cleaning apparatus according to claim 3, wherein the path changing unit includes a sheet reversing mechanism that faces the detour path and reverses the wiping sheet. The sheet reversing mechanism includes a pair of path changing rollers that hang the wiping sheet in a reversed state.
The lens cleaning device according to claim 4, further comprising a holding roller that holds the twisted state of the wiping sheet between the pair of path changing rollers. The lens cleaning device according to claim 1, further comprising a cleaning liquid supply mechanism that drops a cleaning liquid onto the wiping sheet. The wiping movement mechanism for moving at least one of the lens rotation mechanism and the wiping mechanism so that the pair of pressing pads move relative to the lens in a radial direction. The lens cleaning device according to any one of 1 to 6. Each pressing pad is formed like a rubber balloon,
The lens cleaning device according to claim 1, further comprising a compressed air supply mechanism that supplies compressed air to the pair of pressing pads. The lens cleaning apparatus according to claim 1, wherein the lens is a spectacle lens.

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