JPS597549A - Pressing and positioning mechanism of lens in polishing device thereof - Google Patents

Abstract

PURPOSE:To enable grinding processing highly efficiently and precisely, by providing an adsorbing part adsorbing a lens to a grinding holder through suction air and supporting the lens positionably and oscillatably. CONSTITUTION:A holder arm 20 is positioned in accordance with a lens A to be ground through a clamp lever 25, pressing on a holder shaft 1 is adjusted while an adjusting knuckle 33 is slackened little by little adjusting a wing bolt 34 and pressing and adjustment on an adsorbing pipe 4 are performed. Then, a vacuum pump B is actuated to adsorb air from adsorbing groove 16 of a holder 14 and the lens A is made to adsorb and hold to an adsorbing part 15. With this construction, the lens A is turned and oscillated freely for grinding.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lens grinding machine, and more particularly to a polishing apparatus for small and 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 lenses by swinging the spherical core of the polishing plate. In these conventional devices, there are two methods: one in which the center of rocking motion is the spherical center of the lens R and the polishing plate R, and the other in which the holder shaft is swung toward the spherical center. Since the lens is always subjected to unbalanced pressure, it not only worsens the reproducibility of the lens.

Since the polishing plate wears out very quickly, it is necessary to frequently readjust the MR and readjust the swing angle and inside. In addition, although the latter poses no problem in the case of four lenses, many problems arise when polishing a convex lens.

Therefore, after many years of research, the two applicants have developed a lens polishing device (patent application filed in 1983) to solve these problems.
-74289) 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-shape is attached to the other end of the drive shaft.
A polishing plate rotation return mechanism (A) in which a pulley is attached to rotate the polishing plate via a motor, and a center shaft is attached above the box to swing the entire box in a pendulum shape via a bearing; A polishing holder fixing and pressurizing mechanism CB in which a holder shaft with a polishing holder connected thereto is fixed to the upper part of the polishing plate, and a holder arm with a spring for pressurizing is attached to the holder shaft.
), and the lens (L) is compressed between the polishing plate and the polishing holder of both mechanisms to rotate the polishing plate.

In addition, by oscillating the lens and polishing it, the pressure on the lens is always constant against the polishing plate no matter what the angle, so it is possible to polish the lens in a stable state at all times, resulting in accurate and high-quality polished lenses.

The present invention provides a polishing holder fixing pressure mechanism (
B) has been further improved by providing a holder shaft with a center point whose tip is shaped like a trumpet tube.

A polishing holder is attached to the holder shaft, which has a suction groove inside and a center tip whose upper part is formed into a V-shaped cross section, and a spring-equipped suction pipe with a cylinder loft connected to the holder shaft is attached. Attach the air hose to the suction pipe, move the suction pipe up and down via the air cylinder and vacuum pump, position the lens by placing it in the polishing holder, and place it on the polishing plate. A lens in a lens polishing device that aims to improve the positioning of the lens, which is compressed between holders, by freely rotating and oscillating the polishing, and to improve the polishing effect. An embodiment of the present invention will be described below with reference to one drawing.

FIG. 1 schematically shows a lens pressurizing and positioning mechanism in a lens polishing apparatus according to the present invention. In the figure, 1 is a holder shaft, and a polishing holder 14 is attached to the tip. This holder shaft 1 has a suction pipe 4 with seven flange 5 fitted in the downward direction, and a spring 6 is further wound around the cylinder knuckle 10.

Numeral 011, which is connected to the cylinder rod 9, is a head nut for fixing the cylinder knuckle 10 to the suction vibrator 4. 20 is a polishing holder arm, which is fastened to the holder shaft 1 with a slide metal 21. This polishing holder arm 20 is fixed to an air cylinder 21 for suction via a shaft just base 23. The shaft just space 23 is provided with a vertically elongated hole 26 for vertically positioning the polishing holder arm with a clamp lever 25.

24 is an air hose. 27 is holder shaft 1
The just stopper base 2 is fixed to the shaft adjustment base 23 and the spring base 28 through the shaft adjustment base 23.
It is 7. 30 is a shaft stopper for fixing this just stopper base 27, and 29 is a shaft lock nut for further fixing to the holder shaft 1.

Reference numeral 31 denotes a pressurizing knuckle for the holder 7), one end of which is fixed to the upper end of the holder 7) 1, and the other end fixed to a spring adjustment knuckle 33 via a pressurizing spring 32. Reference numeral 34 denotes a butterfly bolt, which is provided with a spring adjustment knuckle 33 for vertical adjustment.

FIG. 2 is a partially enlarged sectional view showing the main parts of the single mechanism, mainly showing the polishing holder 14.
is a center point attached to the tip of the holder shaft 1. The center point 2 has a tip shaped like a trumpet tube, and is screwed onto the holder shaft 1 via a point socket 3 so as to be detachable.

The center knee cover 18 has a trumpet-shaped tip.
This is because the center point 2 can be moved up and down to some extent through the center point 2 to give the entire polishing holder 14 some play. This is because the rotating ball 19 can be freely rotated between the chips 17. That is, a rotatable rotating ball 19 is loosely fitted between the center tip 17 with the center cover 18 fixed to the polishing holder 14 and the tip of the center point 2 attached to the tip of the holder shaft 1. Polishing holder 14
It allows for free rotation and swing. Note that the polishing holder 14 has a suction part 15 for suctioning the lens (Buddha).
and suction grooves 16 are provided internally. The suction groove 16 is a small hole formed in the center of the polishing holder 14, and is configured to be suctioned by a vacuum pump (B) through the air passage 12 of the suction pipe 4. 7 and 8 are O-rings, and 13 is an air joint.

Next, the operation of the two mechanisms will be described. First, the polishing plate rotating and swinging mechanism (not shown) is set, and then the main mechanism is set as shown in FIGS. 1 and 2. That is, the polishing holder arm 20 is positioned via the clamp lever 25 according to the shape and dimensions of the polishing lens body.Next, while adjusting the butterfly bolt 34, loosen the spring adjustment knuckle 33 little by little while adjusting the holder shaft. The pressure applied to the suction pipe 4 is adjusted by adjusting the pressure applied to the suction pipe 4. In this way.

When the pressure adjustment of the polishing holder arm 20 and the suction pipe 4 is completed, the vacuum pump 03) is activated (not shown).
If air is constantly sucked from the suction groove 16 of the polishing holder 14 and the polishing lens (4) is set so that it can be suctioned to the suction part 15, the polishing lens (A) will be attached to the suction part of the polishing holder 14 as shown in FIG. 15 and is held by suction. The polishing lens (A) held in this manner is freely rotated and oscillatedly polished by a polishing plate (not shown) of a polishing plate rotating and swinging mechanism.

The present invention is configured as described above.

Compared to the conventional method ■ With the conventional device, you had to constantly adjust the guideline while operating it, but with a single device, that is not necessary at all, and once you complete the set-up, the device itself can adjust automatically. ■It is very easy to make fine adjustments and is easy to operate, so it can be operated without any skill; ■It can increase the speed of polishing, so it can increase work efficiency; ■Furthermore, It is possible to improve the precision of the finished surface of the lens polishing, and it is also possible to obtain products of consistently high quality. Because it has many effects such as 9, it is a lens polishing device that is excellent from all aspects including performance, work, economy, and practical aspects. It can be said to be a lens pressure positioning mechanism.

[Brief explanation of drawings]

FIG. 1 is an overall schematic explanatory diagram showing a lens pressurizing and positioning mechanism in a lens polishing apparatus of the present invention. FIG. 21 is a partially enlarged view of the main part. 1...Holder shaft 2...Center point 4...-Adsorption vibe 6,32.
...Spring 7.8 ...0 ring
9... Cylinder knuckle 10... Cylinder lot 12, Curve, Air passage 13...
-・Air joint 14・Curved・Polishing holder 15
・・・−・・lP[Mr 16・river・adsorption groove
17 Center tip 18 Center cover
19...times fJ20...polishing holder arm 21...air cylinder 22.
...Cylinder 7 Lange 23...Shaft 7 Adjustment Base 24.
River...Air hose 25...Clamp lever-2
6...Elongated hole 27...Shaft stopper base 28...Spring base 29...
... Shaft 7 trot nut 31 ... Shaft pressure knuckle 33 ... Spring adjustment knuckle 34 ... Curved bolt patent applicant Co., Ltd.
Chika Haru Precision Agent Patent Attorney Kiyoshi Karagi Heir! 1rI! J, 11

Claims (1)

[Claims] A holder shaft is provided with a center point whose tip is formed into a trumpet tube shape, and a polishing holder is installed which has a suction groove inside the holder shaft and a center tip whose upper part is formed into a V-shaped cross section. Furthermore, a suction pipe with a spring attached to the cylinder rod is inserted into the holder shaft, and a suction pipe near air hose is attached to move the suction pipe up and down via an air cylinder and a vacuum pump, and the suction pipe is attached to the polishing holder. A lens pressurizing and positioning mechanism in a lens polishing device, characterized in that the lens is positioned by layering the lens, and the lens compressed between a polishing plate and a polishing holder is freely rotated and oscillatedly polished. .