JPH0119522B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an eyeglass frame frame V-shaped groove inner circumference length measuring device for measuring the inner circumference length of a frame frame in order to accurately match the outer shape of an eyeglass lens with the shape of an eyeglass frame frame. .

One of the operations for fitting eyeglass lenses into a frame is grinding the outer periphery of the eyeglass lenses in order to fit the frame.

Spectacle lenses are shaped by following a template that fits the frame from the required original lens. Due to processing errors and other reasons, the frame frame is different for each product, and even for the same product, the left and right sides are different, and the lens shape cannot be uniformly determined. For this reason, the eyeglass lens prepared using the copy mold is processed to be slightly larger than the frame, and the eyeglass lens is ground to fit the frame and then fitted into the frame.

Conventionally, the grinding process for frame matching involves repeating the grinding process and the process of actually fitting the frame into the frame, in order to finally match the shape of the eyeglass lens with the frame. The glasses are machined while attaching and detaching the spectacle lenses, or are processed using a handrail. Therefore, it takes a lot of time and there is a possibility that processing defects may occur.

In view of such circumstances, the present invention provides a measuring device capable of measuring the inner circumferential length of a V-shaped groove that fits with the circumferential edge of a spectacle lens in a frame, and processes the spectacle lens using a processing machine based on the measured inner circumferential length. The purpose of this invention is to dramatically improve the efficiency of frame fitting work by making it possible to immediately grind to the final shape without removing the frame, and also to greatly improve the accuracy of the grinding process.

Embodiments of the present invention will be described below with reference to the drawings.

In the figure, 1 is a main body cover, 2 is a base frame, and a turntable 3 is installed on the base frame 2. The turntable 3 is circular and has driven teeth 4 carved on its outer periphery. turntable 3
The base frame 2 is attached to the side of the base frame 2 via the bracket 5.
A motor 6 is attached to the motor 6, a pinion 7 is attached to the output shaft of the motor 6, and the driven teeth 4 are engaged with each other. A pair of roller holders 8, 8 are disposed in parallel on the turntable 3 so as to be equidistant from the rotation axis of the table, and a rotation shaft 9 is provided on the upper end surface of the roller holders 8, 8. A required number of rollers 10 are provided upright, and a roller 10 is rotatably fitted to each rotating shaft 9. The roller 1
A slide frame 12 having a pair of slide rails 11, 11 fitted on the bottom surface thereof is supported by roller holders 8, 8 via a roller 10 and a rotating shaft 9. A link frame 13 is fixed to the lower surface of the slide frame 12, and an encoder 15 is attached to the link frame 13 via parallel links 14 extending in the horizontal direction. The shaft 16 of the encoder 15 is connected to the slide frame 12 and the main body cover 1.
The rotor 17 penetrates through the body and protrudes from the main body cover 1 at its tip, and is fitted with a rotor 17 that fits into a V-shaped groove in the frame, which will be described later.

Here, a bar spring 18 is attached in a buckled state between the slide frame 12 and the turntable 3, and biases the slide frame 12 in a predetermined direction (to the left in FIG. 1). Further, 19 is a balance spring, which is hung between the encoder 15 and the link frame 13 to hold the encoder 15 at a required position. Furthermore, 20 is a micro switch, and 25 is a cam for operating the micro switch 20.

An eyeglass frame fixing plate 21 is fixed to the upper surface of the main body cover 1 so that an eyeglass frame 22 to be measured can be held and fixed.

Thus, the rotor 17 is connected to the eyeglass frame frame 23.
The rotor 17 fits into the V-shaped groove 24 of the V-shaped groove 24.
It is designed so that it can roll along the

The operation of the present invention having the above configuration will be explained.

As shown in the figure, the eyeglass frame 22 is loaded and the rotor 17 is fitted into the V-shaped groove 24. The contact pressure between the rotor 17 and the V-shaped groove 24 is applied by the bar spring 18, and in this state, the motor 6 moves the turntable 3.
Rotate. Due to the biasing force of the bar spring 18 and the sliding mechanism of the slide frame 12, the rotor 17 rotates while rolling along the V-shaped groove 24. When the turntable 3 rotates once, the cam 25 activates the micro switch 20 to stop the motor 6. Therefore, the rotor 17 has rolled by the entire inner circumference of the frame 23, and multiplying the circumference of the rotor 17 by the number of revolutions detected by the encoder 15 gives the inner circumference of the frame 23. Can be measured. Also, since eyeglass lenses are not perfectly circular, their peripheral edges are 3
The V-shaped groove 24 also moves up and down. For this vertical displacement, the parallel link 14,
The rotor 17 is caused to follow the action of the balance spring 19.

Since the outer shape of the eyeglass lens is similar to the shape of the frame when it is ground from the original lens, the eyeglass lens is adjusted so that the outer circumference of the eyeglass lens matches the inner circumference measured above. By cutting, the lens can be accurately matched to the shape of the frame without removing it from the processing machine.

Alternatively, the encoder may be held by a vertically slidable slide table, or the slide table may be supported by parallel links, or the bar spring may be replaced with an elastic member such as a coil spring, etc., without departing from the gist of the present invention. Of course, various changes can be made.

As described above, according to the present invention, the shape of a frame can be accurately measured, and the measurement results can be reflected in the grinding of eyeglass lenses, dramatically improving the efficiency of frame alignment work and preventing processing defects. It has an excellent effect of preventing.

[Brief explanation of drawings]

FIG. 1 is a side view of an embodiment of the present invention, FIG. 2 is a front view of the same, and FIG. 3 is an explanatory view showing a state in which a V-shaped groove and a rotor are fitted. 3 is a turntable, 12 is a slide frame, 15 is an encoder, 16 is a shaft, 17 is a rotor, 23 is a frame frame, and 24 is a V-shaped groove.

Claims (1)

[Claims] 1. An eyeglass frame is fixedly held above the turntable with its center substantially coinciding with the center of rotation of the turntable, and on the turntable, a plurality of rollers are provided that are rotatable around a rotation axis extending in the vertical direction. A slide frame having a pair of slide rails fitted with each roller is supported horizontally movably, and an elastic member for horizontally biasing the slide frame is attached to the turn. A link frame extending vertically is fixed to the slide frame, a rotation angle measuring device is attached to the link frame parallel to the link frame through parallel links extending horizontally, and the rotation angle A device for measuring the inner circumference of a V-shaped groove of an eyeglass frame frame, characterized in that a rotor that can fit into the V-shaped groove of the eyeglass frame frame is attached to a rotating shaft of the measuring device.