JPH07100286B2 - Eyeglass lens peripheral chamfering device - Google Patents

Description

TECHNICAL FIELD The present invention relates to an eyeglass lens peripheral edge chamfering device used for chamfering both side corners of an eyeglass lens.

(Prior Art) As an apparatus of this type, there is, for example, a lens outer peripheral processing machine as shown in FIGS. 6 and 7 (see Japanese Patent Laid-Open No. 56-15964).

In this lens peripheral processing machine, the lens 4 to be processed is held between the lens shafts 2 and 3 of the main body 1 to rotate the lens shafts 2 and 3 at a low speed, while the cutting blade 6 driven by the motor 5 is processed to the lens to be processed. 4 to move the cutting blade 6 to the peripheral surface of the lens 4 to be pressure-contacted to control the lens 4 to be processed.
The shape is roughly cut into the shape of the lens frame of the eyeglass frame to be mounted.

Further, the bevel grindstone 7 is moved onto the lens 4 to be processed which is roughly cut in this way, and the bevel grindstone 7 is rotationally driven by the motor 8 so that the bevel grindstone 7 is self-weighted to the peripheral portion of the lens 4 to be processed. By lightly pressing with, the beveled portion 4a is formed on the peripheral portion of the lens 4 to be processed as shown in FIG. During this processing, the lens 4 to be processed is rotated by the lens shafts 2 and 3, so the length of the lens 4 to be processed up to the contact portion with the bevel grindstone 7, that is, the radius vector changes with the rotation. However, the beveling grindstone 7 swings up and down by the swingable arm 9 according to the change in the radius vector.

In this way, the beveled lens 4 has a beveled portion.
It has corners a and b on both sides of 4a.

Then, in order to chamfer the corners a and b, the chamfering grindstone 10 in which the angle θ of the V groove is smaller than that of the bevel grindstone 7 is used in the above-described lens peripheral processing machine.

The chamfering grindstone 10 is attached to an output shaft of a motor 11, and a support plate 12 holding the motor 11 is attached to a support shaft 13 so as to be rotatable and axially movable.

In such a lens outer circumference processing machine,
The corners a and b are chamfered by pressing 12 by hand to bring the chamfering grindstone 10 into pressure contact with the bevel portion 4a of the lens 4 to be processed. The inclination angles of the chamfered slopes 10a and 10b of the chamfering grindstone 10 are constant.

(Problems to be Solved by the Invention) By the way, a lens L to be processed which is chamfered in this manner
For example, in the case of a concave lens, the edge thickness of the bevel portion 4a is not constant over the entire circumference, because the thickness of the lens increases as the distance from the optical axis center increases, and the radius of movement of even one lens changes. Have Moreover, the range of change in the edge thickness is large depending on the power and the lens shape.

Therefore, there is a range in which both side corners a and b of the bevel portion 4a can be chamfered by the chamfering grindstone 10 having a constant angle.
For this reason, conventionally, it is necessary to prepare a large number of chamfering grindstones with an inclination angle according to the range of change in the edge thickness and replace the chamfering grindstone according to the edge thickness, which is necessary for parts management and replacement work There was a problem that it took time.

Therefore, the present invention does not require a large number of chamfering grindstones, is easy to manage parts, and even if the chamfering edge thickness of both corners of the lens to be processed changes significantly, chamfering of one chamfering grindstone An object of the present invention is to provide a spectacle lens peripheral edge chamfering device that can easily adjust the slope according to the edge thickness.

(Means for Solving the Problem) In order to achieve this object, according to the present invention, a support shaft arranged in parallel with a lens axis of a ball slide machine can be moved back and forth in a direction intersecting the lens axis. The chamfered bevel is attached to the main body or carriage of the ball slide machine, the slider is slidably held on the support shaft, and the motor is attached to the slider so that the motor can be tilted in any direction. The chamfering grindstone provided is fixed to the output shaft of the motor, and the slider is a spectacle lens peripheral edge chamfering device that is biased by biasing means in the direction in which the chamfered slope advances.

(Operation) According to such a configuration, the angle of the chamfered grindstone with respect to the lens to be processed is deflected by adjusting the output shaft of the motor by tilting.

(Example) Hereinafter, an example of the present invention will be described with reference to Figs.
An explanation will be given based on (b).

FIG. 1 shows a ball-sliding machine equipped with a spectacle lens peripheral edge chamfering device according to the present invention.

In FIG. 1, reference numeral 14 is a ball-sliding machine, and 15 is a chamfering device on both side corners of the peripheral portion of the spectacle lens according to the present invention.

The ball slide machine 14 includes a main body 16 and bearing projections 16a, 16 on the rear portion of the main body 16.
A support shaft 17 spanned between a, a carriage 18 attached to the support shaft 17 so as to be vertically movable and movable in the axial direction, a mold receiver 19 mounted on the main body 16 so as to be lifted, and a main body 16 It has a lens grinding wheel 20 rotatably attached. The carriage 18 is controlled to move in the longitudinal direction of the support shaft 17 by a drive motor (not shown), the die receiver 19 is vertically controlled by a pulse motor (not shown) in the main body 16, and the lens grinding wheel 20 is
It is designed to be rotated at high speed by a motor (not shown) inside 16. In addition, the lens grinding wheel 20 is a rough grinding wheel 21.
And equipped with a bevel grindstone 22.

Shaft mounting projections 18a, 18b are provided on both sides of the free end of the carriage 18, and lens shafts 23, 24 parallel to the support shaft 17 are rotatably mounted on the shaft mounting projections 18a, 18b, respectively. . Further, the lens shafts 23, 24 are arranged in series on the same axis line, and the lens shaft 24 is provided so that it can be moved back and forth with respect to the lens shaft 23 by rotating the operation knob 25.
Therefore, by this operation, the lens L to be processed is moved to the lens axis 23,2.
It can be held between four or the lens L to be processed can be removed from between the lens shafts 23 and 24. Reference numeral 25 is a template removably attached to the lens shaft 23, 26 is a spindle attached to the carriage 18 in parallel with the lens shaft 23 and rotatable about its axis, 27
Is a stopper lever fixed to the support shaft 26. A notch engaging portion (not shown) is provided at the tip of the stopper lever 27, and the engaging notch engages / disengages with the end of the lens shaft 23 by the turning operation of the stopper lever 27. It is supposed to do.

The construction and operation of such a ball slicing machine are well known, so a detailed description of the operation will be omitted.

As shown in FIGS. 2 and 3, the chamfering device 15 according to the present invention described above includes a locking frame detachably locked to the carriage 18, a grindstone mounting frame 28, and a grindstone mounting frame 28. It has a swing arm attached to the locking frame.

As shown in FIGS. 2 and 4, the locking frame is a support piece.
A pair of side plates 29, 29 formed in a substantially y-shape from 29a, 29b, 29c
And a pair of side plates 29, 29 having connecting shafts 30, 31, 32 for fixing the support pieces 29a, 29a, 29b, 29b and 29c, 29c. Further, each side plate 29 has a shaft engaging notch 29d formed between the base portions of the support pieces 29a, 29b.

The swing arm has side plates 33, 33 whose bases are rotatably mounted on both sides of the connecting shaft 32, and a connecting shaft 34 connecting between the end portions of the side plates 33, 33.

The grindstone mounting frame 28 is a cylindrical connecting shaft that is rotatably fitted to the outer sides of the connecting shaft 34 and the side plates 51, 51 having an inverted V shape and that connects and fixes the central portions of the side plates 51, 51. 52 and side plates 51,51
Has connecting shafts 53, 54 for connecting and fixing the side portions of the. A first slider 55 is attached to the connecting shafts 52 and 53, and a second slider 56 is attached to the connecting shafts 52 and 54.

The first slider 55 has a motor mounting plate portion 57 extending downward, and the motor mounting plate portion 57 is provided with mounting angle adjusting means 58.

The mounting angle adjusting means 58 includes a circular ball fixing plate 59 arranged on the side surface 57a side of the motor mounting plate portion 57, a fixing bolt 60 fixing the ball fixing plate 59 to the motor mounting plate portion 57, and a motor. It has ball receiving holes 61 and 62 formed in the mounting plate portion 57 and the ball fixing plate 59, respectively. The ball receiving holes 61, 62 have the same center line, and the diameters of the opening ends on the opposite sides are larger than the diameters of the opening ends on the opposite side.

Further, the attachment angle adjusting means 58 has a spherical body 63 arranged across the ball receiving holes 61, 62. This spherical body 63 is cut on both sides, and by loosening the fixing bolt 60, the spherical receiving holes 61, 6
It is designed to be rotatable within 2 and to be fixed between the ball receiving holes 61 and 62 by tightening the fixing bolt 60.

A shaft insertion hole 64 opening at both end surfaces is formed in such a spherical body 63, and a motor 65 is fixed to one end surface of the spherical body 63 with a bolt 66. The output shaft 65a of the motor 65 is inserted into the shaft insertion hole 64, and the chamfering grindstone 67 is detachably fixed to the output shaft 65a. A collar 68 is rotatably held on the peripheral surface of the ball fixing plate 59. In addition, chamfering grindstone 67 color 68
A chamfered slope 67a is formed on the side.

Further, an angle adjusting means, a motor, and a chamfering grindstone similar to these parts are also attached to the second slider 56, and the same parts are denoted by the reference numerals with a dash and the description thereof is omitted. The chamfered slopes 67a, 67a 'of the chamfering grindstones 67, 67' correspond to each other. These constitute chamfering means.

A spring 69 wound around the connecting shaft 52 is interposed between the first and second sliders 55 and 56 as a biasing means. With this spring 69, the sliders 55 and 56 are chamfered slopes 67a and 67a.
Is urged in the forward direction.

Although not shown, in the present embodiment, the sliders 55, 56 are
Is configured so that the spring 69 can be temporarily compressed by a solenoid. In this case, use one solenoid for slider 5
It may be inserted between 5,56 and each slider 55,5
You may make it provide a solenoid for every 6.

Next, the operation of the spectacle lens peripheral edge chamfering device having such a configuration will be described.

The lens L to be processed is roughly ground into a lens frame shape by a rough grinding wheel 21, and the peripheral edge of the roughly ground lens L is beveled by a beveling wheel 22. At this time, the chamfering device 15 is removed from the lens shafts 23 and 24.

In this way, the bevel portion is attached to the lens L to be processed by the ball slicing machine 14.
When 50 is applied, corners 50a and 50b are provided on both sides of the beveled portion 50.
Is formed as shown in FIG.

When chamfering the corners 50a and 50b, first, the die receiver 19 is raised by a motor (not shown) and the tip of the carriage 18 is raised so that the lens L to be processed is moved to the first position.
It is separated from the lens grinding wheel 20 as shown in the figure. In FIG. 1, for convenience of explanation, only the carriage 18 is raised,
Although it is shown in a state where the mold holder 19 is not raised,
19 is brought into contact with the template 25 shown.

Next, the side plates 29, 29 forming the locking frame of the chamfering device 15
While engaging the shaft engaging notches 29d, 29d of the lens shafts 23, 24 from diagonally above, the supporting pieces 29a, 29a of the side plates 29, 29 are locked to the upper edge of the carriage 18, and the side plates 29, 29 The support pieces 29d, 29d are locked to the lower edge of the carriage 18.

Next, activate the solenoid (not shown) to cut off the chamfering stones 67, 6
7 is displaced in the direction away from each other, and the motor 65,
While operating 65 ', the lens shafts 23 and 24 are rotated by a motor (not shown) to rotate the lens L to be processed. After that, the beveled portion 50 of the lens L to be processed is brought into contact with the collars 68, 68 '. In this state, since the radius vector of the lens L to be processed changes, the grindstone mounting frame 28 is moved up and down via the swing arm.

After that, when the energization of the solenoid is stopped, the chamfering grindstones 67, 6 are driven by the spring force of the spring 59 as shown in FIG.
The chamfered slopes 67a, 67a 'of 7'are elastically contacted with the corner portions 50a, 50b of the bevel portion 50, so that the corner portions 50a, 50b are chamfered to a predetermined depth.

When the edge thickness of the bevel portion 50 changes, the angles of the chamfered slopes 67a, 67a 'are adjusted according to the edge thickness. That is, when the bolts 60, 60 'of the mounting angle adjusting means 58, 58' are loosened and the motors 65, 65 'are rotated by the spherical bodies 63, 63',
The directions of the output shafts 65a and 65a 'of the motors 65 and 65' are adjusted to arbitrary directions, and the angle of the chamfered inclined surfaces 67a and 67a 'with respect to the lens L to be processed is adjusted by this adjustment. Then, tighten the bolts 60, 60 'to fix the spherical bodies 63, 63' in the ball receiving holes.
By tightening between 61 and 62 and between 61 'and 62', the chamfered slopes 67a and 67a 'are fixed at adjusted positions.

In this embodiment, until the lens L to be processed is brought into contact with the collars 68 and 68 'and the chamfering grindstones 67 and 67' are rotationally driven, the chamfering grindstone is temporarily removed from the lens to be processed using a solenoid. However, the present invention is not limited to this configuration. For example, it may be configured so that it can be manually operated by using a link, a release wire, a lever, or the like for temporarily separating from the lens to be processed. In this case, by changing the lever ratio, the chamfering grindstone can be separated from the lens to be processed by a large amount.

(Effects of the Invention) As described above, according to the present invention, the support shaft provided in parallel with the lens axis of the ball-sliding machine can be moved back and forth in a direction intersecting the lens-axis. A chamfer having a chamfered bevel on one side peripheral edge, which is held by a main body or a carriage, a slider is slidably held by the support shaft, and a motor is mounted on the slider so that the motor can be tilted in any direction. The grindstone is fixed to the output shaft of the motor, and the slider is configured to be biased by the biasing means in the direction in which the chamfered slope advances. Therefore, a large number of chamfered grindstones are not required, and the parts management is easy,
Even if the chamfered edge thicknesses of both corners of the lens to be processed change significantly, the chamfered slope of one chamfering grindstone can be easily adjusted according to the edge thickness.

[Brief description of drawings]

FIG. 1 is a perspective view of a ball shaving machine including a spectacle lens peripheral edge chamfering device according to the present invention. FIG. 2 is a plan view of an essential part of FIG. FIG. 3 is an enlarged perspective view of a main part of FIG. FIG. 4 is an operation explanatory view of a cross section taken along line IV-IV in FIG. FIG. 5 (a) is an operation explanatory view of a cross section taken along the line VV of FIG. FIG. 5B is an explanatory view of the bevel portion of the lens to be processed. FIG. 6 is an explanatory diagram showing the relationship between a conventional spectacle lens peripheral edge chamfering device and a ball slide machine. FIG. 7 is a principal part explanatory view showing the relationship between the lens to be processed and the chamfering grindstone of FIG. 14 …… Rolling machine 15 …… Chamfering device 18 …… Carriage 23,24 …… Lens shaft 65,65 ′ …… Motor (rotational drive means) 65a, 65a ′ …… Output shaft (grindstone shaft) 67,67 ...... Chamfering whetstone 67a, 67a ′ …… Chamfered slope 69 …… Spring (biasing means)

Claims (1)

[Claims] 1. A support shaft arranged parallel to a lens shaft of a ball slide machine is held by a main body or a carriage of the ball slide machine so as to be movable back and forth in a direction intersecting with the lens shaft. The slider is held slidably on the motor, the motor is mounted on the slider so that the motor can be tilted in any direction, and a chamfering grindstone with a chamfered bevel on the peripheral edge of one side is fixed to the output shaft of the motor. A spectacle lens peripheral edge chamfering device which biases the slider by a biasing means in a direction in which a chamfered slope advances.