JPH051906A - Automatic lens edger - Google Patents

Abstract

PURPOSE:To detect a lens distortion continuously in the same process with grinding work by providing a distortion detection means which detects the lens distortion through the observation of an interference fringe. CONSTITUTION:A lens A, which is clamped between both lens rotating shafts 15, 15 of a grinding portion 12 is pressed to a rotating grinding wheel so as to be ground. During its grinding work, a soundproof cover f6 is closed to reduce the outward leak of noise. When the work of the lens is completed, the soundproof cover 16 is opened so that the lens is taken out and is put into the lens frame of a frame. The soundproof cover 16 is closed so as the lens fitted in the frame to be arranged between two pieces of polarizing filters 23, 24. Lighting an illuminating lamp 25, the lens fitted in the frame L is observed via the polarizing filter 23 from above the polarizing filter 23. Whether the lens fitted in the frame L has distortion or not, can be determined, while whether interference fringe, caused by the interference of two polarization lights, appears or not Accordingly the distortion detection of the lens fitted in the frame, which is put into the frame after the grinding work, can continuously performed in the same process with the grinding work.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ball shaving machine having a grinding portion for grinding a lens to be processed.

[0002]

2. Description of the Related Art Conventionally, a ball-shaving machine having a grinding portion for grinding a lens to be processed has been known.

This grinding machine grinds an unprocessed lens into a shape corresponding to the shape of the lens frame by a grindstone provided in a grinding section in order to insert the lens into the lens frame of the spectacle frame. .

The processed lens that has been ground is framed in the lens frame of a spectacle frame, but if the framed lens does not fit the frame shape accurately, the lens will be distorted. Therefore, it is necessary to inspect whether or not the lens fits the frame shape accurately by the strain detector.

[0005]

However, the lens-framed lens, which has been framed after being ground by the ball-slicing machine, is used to detect the lens distortion in a separate process using a strain-detecting device which is a device different from the ball-slicing machine. There was a problem that it was inconvenient to do.

The present invention has been made in view of the above problems, and an object of the present invention is to detect distortion of a framed lens framed after grinding in the same process as grinding. It is to provide a ball slicing machine that can be used.

[0007]

In order to achieve the above object, a ball slicing machine according to the present invention is a ball shaving machine having a grinding portion for grinding a lens to be processed, and the distortion of the lens is observed by observing interference fringes. It is characterized by having a distortion detecting means for detecting.

Further, in a ball shaving machine having a main body provided with a grinding section for grinding a lens to be processed and a display means, a liquid crystal panel forming a display means is provided with an openable / closable soundproof cover for covering the grinding section. When the soundproof cover is closed, it functions as a polarizing filter, the eccentric axis is orthogonal to the liquid crystal panel, and the lenses are arranged so as to face each other with a gap, and the distortion of the lens positioned between them is observed by an interference fringe. The sound-proof cover is provided with a polarization filter to be detected by.

Further, in a ball-sliding machine having a main body in which a grinding part for grinding a lens to be processed is formed, the soundproof cover is attached to each of the openable and closable soundproof covers for covering the main body and the grinding part, and the soundproof cover is closed. At this time, the two eccentric axes are orthogonal to each other and are arranged facing each other with a space therebetween, and it is characterized by having two polarizing filters for detecting the distortion of the lens positioned between them by observing the interference fringes. .

[0010]

With the ball shaving machine according to the present invention, the lens ground in the grinding section and framed in the lens frame is arranged between the two polarizing filters facing each other with the soundproof cover closed, and the polarizing filter is As a result, the distortion of the framed lens after grinding is judged depending on whether interference fringes due to the interference of two polarizations appear or not. The detection can be performed continuously in the same step as the grinding process.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of a ball-sliding machine according to the present invention will be described below with reference to the drawings.

In FIGS. 1 to 3, 10 is a ball shaving machine and 11
Is the main body of the ball mill.

The main body 11 has a grinding section 12 for grinding the lens A to be processed and an operating section 13 (see FIG. 1).

The grinding section 12 has a carriage 14 mounted on the upper surface 11a of the main body 11 so as to be driven left and right.
The carriage 14 has a lens rotation shaft 1 for holding a lens.
Reference numerals 5 and 15 are rotatably mounted. A lens A to be processed is sandwiched between the two lens rotation shafts 15 and 15. The lens A to be processed is placed under the lens A to be processed and is brought into pressure contact with a rotating grindstone (not shown) for grinding. Is processed.

The grinding portion 12 is covered with a soundproof cover 16 which can be opened and closed.

The operation unit 13 is provided on an inclined surface 11b formed in the front portion of the upper surface 11a, and at a substantially center thereof, a liquid crystal panel (LC) as a display means for displaying a grinding condition and the like.
D) 17 is provided with a mounting plate 18 for mounting the glasses G, which is formed of transparent glass, synthetic resin or the like, adjacent to the liquid crystal panel 17 in the substantially left half.
A measurement switch 19 is provided on the right side of the liquid crystal panel 17.

A slit 20 extending in the front-rear direction is formed at the left end of the inclined surface 11b, and the slit 20 is closed by a lid 20a that opens and closes (see FIG. 2).

Between the grinding section 12 and the operating section 13,
It is partitioned by a partition wall 21 rising from the upper surface 11a.

A liquid crystal panel 17 is provided at the front edge of the inclined surface 11b.
A contact wall 22 having a reference contact surface 22a is formed corresponding to the load plate 18 and the load plate 18.
The eyeglasses G placed on the table are prevented from slipping off (see FIG. 3).

The soundproof cover 16 is rotatably attached to the upper part of the rear end of the main body 11, and when closed, the front end 16a contacts the upper surface 21a of the partition wall 21 and the side end 16b contacts the upper surface 11a. Main body 1 with the grinding part 12 included
It is placed on the upper surface 11a of the sheet 1 in a substantially contact state (see FIG. 2). A finger hook 16c is provided on the front end 16a.

At the front end 16a of the soundproof cover 16, there is provided a polarizing filter 23 which is spaced apart upward from the mounting plate 18 and is positioned substantially parallel to the soundproof cover 16 when the soundproof cover 16 is closed (see FIG. 1). ).

Then, facing the polarization filter 23,
A polarization filter 24 is installed on the upper surface of the mounting plate 18 (see FIG. 1), and an illumination lamp 25 as an illumination light source that irradiates the polarization filter 24 is provided below the mounting plate 18 ( (See FIG. 6).

By closing the soundproof cover 16, these two polarizing filters 23, 24 are positioned in parallel with each other with their eccentric axes orthogonal to each other and with a space therebetween. When the positioned lens is distorted, interference fringes appear due to the interference of two polarized lights.

Therefore, the distortion of the lens can be detected by observing the interference fringes. These two polarizing filters 23 and 24 function as distortion detecting means.

The polarizing filter 24 is rotatably attached to the rear end of the mounting plate 18, and can be held upright at the rear of the mounting plate 18 when not in use. (See Figure 3). Further, the polarizing filter 24 may be used as it is as a mounting plate.

As shown in FIGS.
Below the base plate, the base plate 2 fixed in the main body 11
6 are provided. Guide rails 27, 27 extending in the front-rear direction are fixed in parallel to the base plate 26, and a slider 28 having a left-right length slightly longer than the base plate 26 is attached to the guide rails 27, 27 so as to be movable back and forth. (See Figure 4).

A nut 28a is attached to the center of the slider 28, and a feed screw 29 arranged in parallel with the guide rails 27, 27 is screwed into the nut 28a. The feed screw 29 is rotatably supported by the base plate 26 via a bearing 29 a, and is rotationally driven by a pulse motor 30 fixed to the base plate 26. Microswitches 31 and 32 for slider detection fixed to the base plate 26 are disposed near both ends of one guide rail 27 (see FIG. 5).

A one-dimensional CCD 33 having a length substantially equal to the lateral width of the base plate 26 is attached to the upper surface of the slider 28 as a light receiving portion, and one end portion of the slider 28 has an upper end portion of a vertically extending cylindrical body 34. Is fixed.
In the cylindrical body 34, a piston 35 is slidably arranged, and a spring 36 for biasing the piston 35 upward is arranged.

A lower end of a column 37 is attached to the piston 35, and an arm 38 is attached to an upper end of the column 37.
Is attached at the base end so as to be horizontally rotatable.

Although not shown in the drawing, a mark is provided on the support column 37 and the arm 38 so that the arm 38 and the one-dimensional CCD 33 are aligned in parallel with each other, and the positioning is ensured at this position. Means are provided between the column 37 and the arm 38.

As the positioning means, the column 37 and the arm 3 are used.
8 may be provided with stoppers (not shown) that come into contact with each other, or may be a moderation mechanism for engaging a ball urged by a spring provided on one side with a positioning groove provided on the other side.

On the arm 38, a linear illumination lamp 39 extending in the same direction as the arm 38 is held slidably in the longitudinal direction. A parallel luminous flux is projected from the illumination lamp 39 toward the one-dimensional CCD 33.

Further, in FIG. 6, reference numeral 40 is an arithmetic control circuit. The arithmetic control circuit 40 includes the one-dimensional C described above.
Output data from the CD 33 and the micro switch 31,
The ON / OFF signal from 32 is input to the arithmetic and control circuit 40, and the ON signal from the measurement start switch 41, that is, the measurement start signal is input.

Moreover, the arithmetic and control circuit 40 uses a one-dimensional CC.
Based on the output data from D33, the geometric center distance of the glasses G (FPD in the case of rim frameless glasses) is calculated, and a control signal to be displayed on the liquid crystal panel 17 is output.
When the measurement start signal is input, the arithmetic control circuit 40 turns on the illumination lamp 39, which is an illumination light source, and also causes the slider 28 to pulse in the direction in which the guide rails 27, 27 move from one end to the other end. The operation of the motor 30 is controlled. Further, the arithmetic and control circuit 40 uses the pulse motor 30.
When an ON signal is input to either one of the microswitches 31 and 32 during the operation of, the pulse motor 30 is stopped and controlled.

The function of the arithmetic control circuit 40 will be described together with its function.

(1) Non-Measurement Normally, when the geometric center distance of the spectacles G is not measured, first the illumination lamp 39 is slid to the base of the arm 38 and the length from the column 37 to the tip of the illumination lamp 39 is increased. In addition to minimizing the height, the column 37 is positioned at the end of the slit 20, and the arm 38 and the illumination lamp 39 are horizontally rotated to be parallel to the slit 20. In this state, the illumination lamp 39 is pressed downward against the spring force of the spring 36, whereby the illumination lamp 39, the arm 38, and the column 37 are displaced downward and housed in the slit 20, and the lid 20a slits the slit. Close 20. It should be noted that, after the turning operation to the storage position, the upper surface of the illumination lamp 39 is held by a stopper (not shown) provided on the main body 11. The stopper may be a rotating member mounted so as to be able to move forward and backward with respect to the opening of the slit 20, or a pin that can be moved forward and backward with respect to this opening.

(2) At the time of measurement When measuring the distance between the geometric centers of the glasses G, the support 37 is pulled out from the slit 20 and the illumination lamp 3 is used.
Slide 9 to the tip of arm 38 to move arm 3
By rotating 8 horizontally, the illumination lamp 39 is disposed on the mounting plate 18 and is parallel to the one-dimensional CCD 33 (see FIGS. 1 and 3). Note that when the illumination lamp 39 is pulled out, the slider 28 causes the micro switch 3 to move.
Either one of 1 and 32 is turned on.

On the other hand, for example, rim frameless glasses G are placed on the mounting plate 18, and the lower ends of the left and right lenses of the glasses G are brought into contact with the reference contact surface 22a (FIG. 3).
reference). In the figure, B is a bridge of glasses G.

In such a state, the measurement switch 1
Press 9 to input the measurement signal to the arithmetic and control circuit 40. As a result, the arithmetic control circuit 40 turns on the illumination lamp 39, controls the operation of the pulse motor 30 to rotate the feed screw 29, and causes the slider 28 to move to the guide rail 27.
27 is moved from one end to the other end. When the slider 28 turns on one of the microswitches 31 and 32 by this movement, an ON signal is input to the arithmetic control circuit 40, and the arithmetic control circuit 40 controls the pulse motor 30 to stop.

With such an operation, the parallel light flux projected from the illumination lamp 39 sequentially linearly projects a part of the glasses G onto the one-dimensional CCD 33. Then, the output data from the one-dimensional CCD 33 is input to the arithmetic control circuit 40.

The arithmetic control circuit 40 obtains the lens size, the nose width size, etc. of the glasses G based on the output data from the one-dimensional CCD 33, and calculates the geometric center distance of the glasses G from them. The calculated geometrical center distance is displayed on the liquid crystal panel 17 and used as lens processing data by the ball shaving machine 10.

Next, the operation of the ball shaving machine having the above structure will be described.

First, both the lens rotation shafts 15 of the grinding section 12,
The lens to be processed A sandwiched between 15 is pressed against a rotating grindstone and ground. By closing the soundproof cover 16 during the grinding process, it is possible to reduce external leakage of noise.

In the grinding process, the distance between the geometric centers of the glasses G is calculated in advance to obtain lens processing data.
The geometric center distance of the glasses G is easily calculated on the spot by the ball shaving machine 10 by raising the polarizing filter 24 rearward and mounting the glasses G on the mounting plate 18 (see FIG. 3). can do.

The processed lens that has been ground is taken out by opening the soundproof cover 16 and put in the lens frame of the frame.

After framing, the illumination lamp 39 and the arm 3
8, the column 37 is stored in the slit 20, and the lid 20a
The slit 20 is closed and the soundproof cover 16 is closed (see FIG. 2), and the framing lens L is arranged between the two polarizing filters 23 and 24.

Then, as shown in FIG. 7, the illumination lamp 2
Then, the framed lens L is observed from above the polarizing filter 23 through the polarizing filter 23. As a result of the observation, it can be determined whether or not the framed lens L is distorted by whether or not interference fringes due to the interference of the two polarized lights appear.

That is, as shown in FIG. 8, when the interference fringes α are observed, it is in a non-conforming state because the distortion is generated (see (a)), and when the interference fringes are not observed, the distortion is observed. It is in a conforming state since no occurrence of (see (b)).

Therefore, the distortion of the framed lens framed after the grinding can be continuously detected in the same step as the grinding.

By the way, in the above embodiment, the example of the ball-sliding machine having the function of calculating the distance between the geometric centers of the spectacles G has been shown, but the ball not having the function of calculating the distance between the geometric centers of the spectacles G is shown. An example of the sliding machine is shown below.

A ball-sliding machine 50 shown in FIGS. 9 and 10 includes a ball-sliding machine body (main body) 51, a grinding section 12 for grinding a lens to be processed, and a liquid crystal panel (LCD) as display means for displaying a grinding condition and the like. ) 17 and does not have a function of calculating the distance between the geometric centers of the eyeglasses G, it has the same configuration as the ball shaving machine 10.

The liquid crystal panel 17 has an upper surface 51a of the main body 51.
The switch 18 is provided on the substantially left half of the inclined surface 51b formed on the front part of the switch, and on the right side of the liquid crystal panel 17.

The liquid crystal panel 17 has an analyzer and a polarizer arranged above and below the liquid crystal, and functions as a polarizing filter by the polarizer in the liquid crystal transmitting state. A backlight (not shown) is arranged below the polarizer side.

When the soundproof cover 16 is closed, the front end 16a of the soundproof cover 16 that can be opened and closed to cover the grinding portion 12 is
A polarization filter 23 is provided so as to be spaced apart upward from the liquid crystal panel 17 and positioned substantially parallel to the liquid crystal panel 17.

By closing the soundproof cover 16, the polarizing filter 23 and the liquid crystal panel 17 are positioned parallel to each other with their eccentric axes orthogonal to each other and with a space (see FIG. 10). When the framed lens L located between the liquid crystal panels 17 is distorted, interference fringes appear due to the interference of the two polarized lights.

Therefore, by illuminating the illumination lamp 25 or the backlight, the framing lens L is observed from above the polarization filter 23 through the polarization filter 23, and the distortion of the lens can be detected by the presence or absence of interference fringes. Therefore, the distortion of the framed lens L framed after the grinding can be continuously detected in the same step as the grinding.

As described above, by opening and closing the soundproof cover 16, the liquid crystal panel 17 can be switched to use as the display means or the strain detector, so that no dedicated strain detector is required. Further, the distortion detection of the framed lens framed after the grinding can be continuously performed in the same step as the grinding.

[0058]

The ball-sliding machine according to the present invention is a ball-sliding machine having a grinding portion for grinding a lens to be processed, and has a distortion detecting means for detecting a distortion of the lens by observing interference fringes. There is.

Further, in a ball shaving machine having a main body provided with a grinding portion for grinding a lens to be processed and a display means, a liquid crystal panel forming an opening and closing soundproof cover for covering the grinding portion and forming the display means is provided. When the soundproof cover is closed, it functions as a polarizing filter, the eccentric axis is orthogonal to the liquid crystal panel, and the lenses are arranged so as to face each other with a gap, and the distortion of the lens positioned between them is observed by an interference fringe. The sound-proof cover is provided with a polarization filter to be detected by.

Furthermore, in a ball-sliding machine having a main body in which a grinding portion for grinding a lens to be processed is formed, the soundproof cover is attached to each of the openable and closable soundproof covers for covering the main body and the grinding portion, and the soundproof cover is closed. At this time, the two eccentric axes are orthogonal to each other and are arranged facing each other with a space therebetween, and it is characterized by having two polarizing filters for detecting the distortion of the lens positioned between them by observing the interference fringes. .

A ball-sliding machine having a grinding portion for grinding a lens to be processed is characterized by having distortion detecting means for detecting the distortion of the lens by observing interference fringes.

Therefore, the distortion of the framed lens that has been framed after grinding can be continuously detected in the same step as grinding.

[Brief description of drawings]

FIG. 1 is a perspective view of a ball slicing machine according to the present invention.

FIG. 2 is a perspective view showing a state where a soundproof cover of the ball slide machine shown in FIG. 1 is closed.

FIG. 3 is a perspective view of a beading machine showing a measurement state of glasses.

FIG. 4 is an explanatory view of a main part of a geometric center distance measuring device for glasses.

FIG. 5 is a plan view of FIG.

FIG. 6 is a control circuit diagram of the geometric center distance measuring device of the glasses shown in FIG.

FIG. 7 is an explanatory diagram showing a schematic configuration of a strain detector.

8A and 8B show an observation state of interference fringes. FIG. 8A is an explanatory diagram of a state where the interference fringes are observed, and FIG. 8B is an explanatory diagram of a state where the interference fringes are not observed.

FIG. 9 is a perspective view showing another example of a ball slide machine.

FIG. 10 is a perspective view showing a state where the soundproof cover of the ball slide machine shown in FIG. 9 is closed.

[Explanation of symbols]

10,50 jade machine 11,51 body 12 Grinding section 16 soundproof cover 17 Liquid crystal panel (display means) 23, 24 Polarizing filter A Work lens

Claims (3)

[Claims] 1. A ball shaving machine having a grinding section for grinding a lens to be processed, comprising a strain detecting means for detecting a strain of the lens by observing interference fringes. 2. A ball mill having a main body provided with a grinding section for grinding a lens to be processed and a display means, and a liquid crystal panel forming an opening and closing soundproof cover for covering the grinding section, the liquid crystal panel forming the display means. Let it function as a polarizing filter,
When the soundproof cover is closed, a polarizing filter that is disposed so as to have an eccentric axis orthogonal to the liquid crystal panel and to face each other with a gap, and to detect distortion of a lens positioned between the two by observing interference fringes is provided. A ball shaving machine provided on the soundproof cover. 3. A ball mill having a main body in which a grinding portion for grinding a lens to be processed is formed, which is attached to each of the soundproof covers that can be opened and closed to cover the main body and the grinding portion, and the soundproof cover is closed. In this case, each eccentric axis is orthogonal to each other, and the two polarizing filters are arranged so as to face each other with a gap and detect the distortion of the lens positioned between them by observing the interference fringes. Throwing machine.