JPS5993262A - Automatic polishing measurement apparatus in lens polishing mechanism - Google Patents

Abstract

PURPOSE:To automate polishing measurement by fixing a dial gauge equipped with an electrical contact onto a holder arm through an installation plate, in a polishing mechanism for a fine spherical-core lens having a small or medium diameter. CONSTITUTION:In an automatic polishing measurement apparatus, a lens (work) L to be polished is set onto an abrasive saucer 1, and a polishing holder 24 is set onto the lens L while, the polishing measurement value for the lens L to be polished is determined, and a control knob 32 is set. Then, an abrasive saucer revolving and switching mechanism and a mechanism B are operated. Then, simultaneously with the revolution of the saucer 1, a whole box swings, and the polishing holder 24 is pressurized through a holder shaft 20, and the lens L set between the saucer 1 and the holder 24 is polished automatically. With such a measurement apparatus installed, manual operation can be eliminated, and perfect control through automatic control is permitted.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lens grinding machine, especially a small one. This invention relates to a polishing mechanism for medium-diameter precision spherical lenses.

Lens polishing devices that have been commonly used can be roughly divided into two types, depending on whether the direction in which the holder shaft (hairpin) is inserted always presses the spherical core of the polishing plate or not. The present invention belongs to the latter category, and is primarily an apparatus for polishing a lens by swinging a spherical core of a polishing plate. In these conventional devices, the center of the rocking motion is the lens R.
There are two methods: one in which the boulder shaft is swung toward the spherical center of the polishing plate R, and the other in which the boulder shaft is swung toward the spherical center.In the former, the angle of the lens changes, so pressure is always applied to the lens in an unbalanced manner. Therefore, if the reproducibility of the lens becomes worse, 7J
)Rika.

Since the polishing plate wears out very quickly, it is necessary to frequently readjust the plate R and readjust the swing angle and width. Further, although the latter poses no problem in the case of a concave lens, many problems arise when polishing a convex lens.

Therefore, the applicant of the present application has developed a system to solve the above-mentioned drawbacks and problems based on the results of many years of research, and has previously filed a patent application (Japanese Patent Application No. 74289/1989). That is, a drive shaft with a spindle is installed in the center of the cylindrical box, a polishing plate with a spherical recess is attached to the tip of the drive shaft, and a V-pulley is attached to the other end of the drive shaft. A polishing plate rotating/swinging mechanism (A) that rotates the polishing plate and swings the entire box in a pendulum shape via a bearing attached to a center shaft above the box.
and an abrasive holder fixing and pressurizing mechanism (B) in which a holder shaft to which an abrasive holder is connected is fixed to the upper part of the abrasive plate, and a holder arm with a spring for pressurizing is completely attached to the holder shaft. By placing the lens (L) between the polishing plate and the polishing holder of both mechanisms and polishing by rotating and rocking the polishing plate, the lens is always applied from the spherical direction to the polishing plate at any angle. The present invention has disclosed a lens polishing device which is capable of polishing in a stable state at all times because the applied pressure is always a constant pressure, and which aims to obtain accurate and high-quality polished lenses.

The present invention relates to an improvement of the disclosed device, including the polishing holder fixing and pressing mechanism (B).

A grounded measuring terminal is attached to the dial gauge with electrical contacts, and the measuring terminal is fixed to the holder shaft via a detection plate connected to an adjustment bolt, and the dial gauge with electrical contacts is attached to the holder via the mounting plate. The present invention provides an automatic polishing measurement device for a lens polishing mechanism, which aims to automate polishing measurement by being fixed to an arm.

An embodiment of the present invention will be described below with reference to one drawing.

Figure 1 shows a conventional lens polishing device.
It can be roughly divided into a polishing plate rotating and swinging mechanism (A) and a polishing holder fixing and pressing mechanism CB).

The polishing plate rotating and swinging mechanism (A) has a drive shaft 2 with a spindle 3 attached to a bearing 15*1 in the center of a cylindrical box.
A polishing plate 1 for polishing a lens (L) having a spherical recess is screwed onto the upper end of the drive shaft 2, and a V pulley 4 is attached to the other lower end. ,
It rotates via a V-pulley 5 and a belt 7.

The V-pulley 5 is attached to a drive shaft 6 that is linked to a spindle motor 9, and the operation of the spindle motor 9 allows the polishing plate 1 to rotate freely. A center shaft 12 is attached to the center shaft 12 through a swing post 16 which is linked to a spindle motor 9.
It can be freely swung in a pendulum shape via the swing cylinder 17 and the swing cylinder 17. That is, the polishing plate rotating and swinging mechanism (A) automates the rotational movement of the polishing plate and the swinging movement of the box. 8 is the sleeve, 10 is the sleeve base,
13 is the bearing case, 14 is the frame base, 18
is cylinder two 1-. It is 19 ha frames. next,
The polishing holder fixing pressure mechanism (B) is made of metal 22
The abrasive holder 24 is attached to the tip of the boulder shaft 20 attached to the holder arm 21 through the holder arm 21, and the spring 23 for pressurizing the holder arm 21 is fixed to pressurize the holder shaft 20. The lens (L) placed on the polishing plate L is to be pressurized. In other words, the polishing holder fixing pressure mechanism (B
) fixes the polishing holder 24 and always applies pressure to the spherical core of the polishing plate 1 from a fixed direction (vertical direction) to remove the lens (L).
This is a mechanism for placing the polishing plate 1 and the polishing holder 24 in the correct position. Note that 25 is an abrasive drain bit.

FIG. 2 shows a state in which the automatic polish measuring device of the present invention is attached to a conventional polishing device.

The automatic polish measuring device of the present invention is attached to the polishing holder fixing and pressing mechanism (B) of the conventional device, and 30 is its main body, which is a dial gauge with an electric contact. This dial gauge 30 has an electrical contact activated through a lead wire for taking out a signal, and is grounded to a measurement terminal 33 attached to the upper part. That is, the measurement terminal 33
The suppressing operation activates the electrical contacts in the dial gauge 30 to issue a stop signal. Reference numeral 32 is an adjustment knob for the electrical contact, and is an adjustment knob for predetermining the polishing measurement value. In other words, if the abrasion measuring device is set using the adjustment knob 32 to match the scale of the dial gauge 30, the needle will move to the adjusted scale by pressing the measurement terminal 33, and a stop signal will be issued. be. Reference numeral 34 denotes an adjustment bolt, which is fixed to the upper part of the tip of the measurement terminal 33 via a detection plate 35. This adjustment bolt 34 is for positioning the polishing measurement value by adjusting the length of contact with the measurement terminal 33, and is connected to the holder shaft 20 for detecting and operating the adjustment bolt 34. It is a single plate for interlocking. That is, by vertical movement of the holder shaft 20.

This is to move the adjustment bolt 34 up and down to the adjustment pole, and by moving the adjustment bolt 34 up and down, the measurement terminal 3
The tip of 3' can be pressed freely. 36 is a dial gauge mounting plate, which is mounted between the measurement terminal 33 and the holder arm 21.

This mounting plate 36 fixes the dial gauge 3o to the holder arm 21, and by this fixing, the detection plate 35 fixed to the holder shaft 20 can be moved up and down. This figure shows the operation of the apparatus of the present invention, and is an enlarged view of the polishing holder fixing and pressing mechanism (B). To explain the automatic polish measuring device of the present invention in detail with reference to this figure, first, a lens (work) L for polishing is placed on the polishing plate 1, a polishing porter 24 is placed lightly on it, and the lens L to be polished is placed on the polishing plate 1. Determine the polishing measurement value and set the adjustment knob 32. Next, the polishing plate rotating and swinging mechanism (4) and the polishing holder fixing and pressing mechanism (B) are activated.

Then, as the polishing plate 1 rotates, the entire box swings, and the polishing holder 24 is pressurized via the holder shaft 20.
The lens L in between will be polished automatically. When the dial gauge 30 is polished up to the point I on which the measured value has been set in advance, the polishing plate 1 automatically stops when the needle moves to the desired scale (S). At the same time, the pressurization of the holder shaft 20 is also stopped at the same time. In other words, if the lens L is polished by (B), the adjustment bolt 34 moves downward and presses the measurement terminal 33 by (M), so that the measured value becomes equal to (M). This is possible.

The present invention is configured as described above.

It has many advantages over the conventional method, including the following.

(1) In the conventional system, it was necessary to constantly adjust the guideline during operation, but by installing nine devices, this operation is not necessary at all, and all adjustments can be made automatically.

(2) Since the adjustment itself of this device is very simple and the operation is easy, it can be easily operated even without special skill.

(3) Since there are no measurement errors with measuring instruments or equipment setting errors, it is possible to obtain products of uniform and good quality.

(4) Products that require high precision require particularly high reliability, which is impossible in the past.

Products with high precision, which had been considered difficult, can now be easily obtained.

(5) The time required for polishing operations 7, etc. can be shortened.

Work efficiency will be improved.

The present invention has many effects as described above.

It can be said that this is an automatic polishing measuring device for lens polishing mechanisms that is excellent from all aspects including performance aspects, work aspects, economic aspects, and practical aspects.

[Brief explanation of the drawing]

Figure 1 is an overall schematic diagram showing a conventional lens polishing device;
FIG. 2 is a schematic explanatory diagram showing the automatic polish measuring device of the present invention attached to the conventional device shown in FIG. 1, and FIG. 3 is an enlarged explanatory diagram showing two essential parts of the present invention. 1... Polishing plate 3... Spind/L/11...
Sleeve 12... Center shaft 20... Holder shaft 21... Holder arm 23...
・30 springs Dial gauge 31...Lead wire 32...Adjustment knob 33...Measuring terminal 34
...Adjustment bolt 35...Detection plate patent applicant: Haru Chika, secret agent, patent attorney Joji Karaki, Figure 3

Claims (1)

[Claims] A polishing plate rotating/swinging mechanism (A) that rotates a polishing plate installed in the center of the box and swings the entire box in a pendulum shape, and a polishing holder connected to the polishing plate. , and a polishing holder fixing and pressing mechanism (B) that pressurizes the holder shaft via a spring, and the polishing holder fixing and pressing mechanism (B) is grounded to a dial gauge with an electric contact. A lens characterized in that a terminal is attached, the measuring terminal is fixed to a holder shaft via a detection plate connected to an adjustment bolt, and the dial gauge with electric contacts is fixed to a holder arm via a mounting plate. Automatic polishing measuring device in polishing mechanism.