JPS60228062A - Driving device for rotating polishing disk - Google Patents

Abstract

PURPOSE:To accurately and efficiently polish the end face of an optical fiber, by engaging a pinion with an internal gear to impart a rotative motion to a cylindrical annular member which is fitted on a support shaft and performs an eccentric motion, and by securing a polishing disk to a flange at the top of the cylindrical annular member in such a manner that the disk can be centered at will. CONSTITUTION:A support shaft 29a is eccentrically moved by the rotation of a support shaft 29 so that a disk 3 and a cylindrical annular member 36 fitted on the support shaft are eccentrically moved and a pinion 36a is rotated on the internal circumferential surface of an internal gear 35 in the direction opposite to that of the eccentric motion of the disk 3 and the member 36. The tip face of a ferrule 11 pushed on a polishing sheet by the weight of a collet chuck 12 is accurately polished with a high degree of parallelism as polishing water is cooling the ferrule and washing away dust made by the polishing. The degree of parallelism for the eccentrically rotated disk 3 is finely adjusted by an adjusting screw 38 so that the degree of squareness for the tip face of the ferrule is ensured to be high. Since the disk 3 is optionally removable from the support shaft 29a at the eccentric shaft 29, the degree of parallelism can be easily adjusted after the disk 3 is removed from the eccentric shaft 29. Work efficiency is thus promoted.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rotational drive device for a polishing disk in an optical fiber end face polishing machine, and is configured to perform eccentric rotational movement using a rational configuration.

The conventional optical fiber end face polishing device is disclosed in Japanese Patent Application Laid-open No. 57-12.
As seen in No. 7656, etc., on a rotating polishing disk,
This is a method of polishing the connector end face of an optical fiber attached to a sample holder by pressing it with an appropriate weight force. The sample holder is vibrated on the disk so that no cracks are formed on the end face. The disadvantages of this polishing method are:
A driving device is required for each of the polishing disk and the sample holder, which not only complicates the configuration but also makes it difficult to provide a plurality of polishing disks in a compact manner. (2) Since the sample holder makes a rocking motion, it is difficult to obtain the surface angle of one end of the optical fiber.

(2) When the sample holder swings, the optical fiber cord attached to it also swings, weakening the strength of the optical fiber, especially at the connector portion. etc.

Therefore, the ideal type of optical fiber end face polishing apparatus is one in which the polishing steps of roughing, lapping, and polishing can be quickly changed over, and the sample holder does not swing. For this purpose, it is desirable to have a dedicated polishing disk for each polishing process, and to provide a disk rotation drive device that rotates the polishing disk eccentrically. In an end-face polishing device equipped with only one polishing disk, it is possible to replace the polishing sheet of each grain size by attaching and replacing the polishing disk with a polishing sheet of each grain size by a simple means. It is hoped that it can be replaced.

The present invention aims to provide a rotational drive device for a polishing disk that can meet the above-mentioned needs.

That is, in the rotary drive device of the present invention, a cylindrical ring having a pinion and a flange is removably fitted onto a support shaft on an eccentric shaft rotated by a drive motor, and the pinion of this cylindrical ring moves eccentrically. A grinding disk is fixed to the top flange of the cylindrical ring so as to be freely aligned. This results in
The rotational drive mechanism of the polishing disk is simply constructed, and the polishing disk can be freely attached to and removed from the eccentric shaft and the parallelism of the polishing disk can be aligned.
It can be polished with high efficiency.

DESCRIPTION OF THE PREFERRED EMBODIMENTS A rotational drive device for a polishing disk according to the present invention will be described below with reference to embodiments shown in the drawings.

First, reference numeral 100 denotes an optical fiber end face polishing apparatus according to the present invention, in which a polishing disk 2 for roughing, a polishing disk 3 for lapping, and a polishing disk for boring are provided on the upper surface 1a of a cubic housing 1. 4 and a maximum of six optical fiber connectors for polishing, and a polishing water supply tank 6.

Next, regarding the detailed configuration of each part, the swing arm stand 5 has its base end bearing hole 5a rotatably received in the upper shaft part 7a of the support column 7 placed on the substrate 10' in the housing 1. held. The vertical position of the swing arm stand 5 is determined by being received by the upper surface of a flange 7b extending from the upper shaft portion 7a of the support column 7. Further, the rotational positioning of the rotating arm base 5 is performed by inserting a pin 8 implanted near the base end bearing hole 5a of the arm base 5 into one of the positioning holes 9a, 9b, and 9C drilled in the upper surface of the flange 7b.
When the pin 8 is engaged with the hole 9b as shown in Figure 2, the tip of the arm stand is positioned on the polishing disk 3 for lapping. Therefore, when the pin 8 engages with the hole 9a, the arm stand 5 is positioned on the polishing disk 2 for roughing, and when the pin 8 engages with the hole 9C, it is positioned on the polishing disk 4 for polishing.

Reference numeral 10 denotes a handle attached to the upper surface of the middle of the arm stand 5. When rotating and positioning the arm stand 5 on each polishing disk, the handle is lifted and pulled out from the pin No. 8 holes 9a, 9b, and 9c, and the arm stand 5 is rotated to a predetermined position. and then insert the pin 8 again into the desired hole 98~
Used to engage 9C. At the tip of the arm stand 5, a large number of holding holes 5b are opened circumferentially in the vertical direction, and a cutout groove 5C is provided at one location on the upper side.

A collet chuck 12 that grips the ferrule 11 of the connector attached to the tip of the optical fiber F and the main body 13 are inserted into the holding hole 5b from above,
The pin 13a of the main body 13 engages with the notch groove 5C. Due to the weight of the collet chuck inserted into the holding holes 5b and its main body 13, the tip end surface of the ferrule 11 is pressed against the polishing sheet S2 stuck to the surface of the polishing disk 3.

Now, the optical fiber is
The end face of the ferrule 11 of the ferrule will be polished.

Next, the rotational drive mechanism for each of the polishing disks 2 to 4, which is the main part of the present invention, will be explained. With reference to FIG. 2, one drive mechanism (the others have the same configuration) will be explained. 0', a cylindrical base 25 has its flange 25a connected to bolts 26...
and fix the inner cylinder 25)+ through the through hole 10a of the substrate 10'.
’. Reference numerals 27 and 28 denote bearings that are press-fitted on the upper and lower sides of the inner cylinder 25b, and the eccentric shaft 29 is supported on the inner ring. The lower end of the eccentric shaft 29 is connected to the through hole 10' of the substrate 10'.
It protrudes downward from a, and the timing pulley 30 is fitted therein. This timing pulley 30 and the other two discs 2
．． A timing belt 33 is wound around the timing pulley 34 of the drive motor M placed on the substrate 10' around the pulleys 31 and 32 of No. 4. Now drive motor M
When activated, each eccentric shaft (only 29 is shown) is rotated simultaneously. A bulged large diameter portion 25c is provided above the cylindrical base 25, and the internal gear 3 is attached to the top ring portion 25d.
636, to which 5 is screwed with several screws, is a cylindrical ring, which is detachably and rotatably fitted to the support shaft 29a connected eccentrically above the eccentric shaft 29 via the thrust bearing 20. held. Then, the lower pinion 36a is engaged with the internal gear 35, and the polishing disk 3 is attached to the upper flange 36b.
is attached with several screws 37 so that the parallelism can be adjusted freely. That is, as shown in FIG. 3, the flange 36b
At the same time, the disc 3 is screwed in with the screws 37 passed through the four places on the flange 36b, and the lock nuts 39 are screwed into the adjustment screws 38 screwed back in the four places on the flange 36b. There is. By adjusting the amount of protrusion of the adjustment screw 38 with respect to the disk lower surface 3a, the eccentric shaft 29
The surface angle of the polishing disk 3 with respect to the axis 0, that is, the parallelism with respect to the ferrule 11 can be finely adjusted. Of course, the flange 25a of the cylindrical base 25 is also screwed back with adjustment screws 50 and lock nuts 51 similar to those of the disc 3, and the eccentric shaft is adjusted by the amount of protrusion from the base plate 10'. The configuration allows the axis O of 29 to be finely adjusted to the vertical position.

Reference numeral 40 denotes a water tray disposed below each of the polishing disks 2 to 4, and a flange 40b is attached to the open upper surface 1a of the housing 1 with screws. 41 is a water pipe connected to the annular gutter 40a of the water tray 40, the tip of which faces the drain tank 43. Polishing water is supplied to the polishing sheets 81 to S3 attached to the upper surface of each polishing disk 2 to 4 from the supply tank 6 through a vinyl pipe 45 through a through hole 5d drilled in the center of the tip of the rotating arm stand 5. The water is supplied to the water supply pipe 46 inserted into the water supply pipe 46.

The polishing disk rotation drive device of the present invention is constructed as described above and operates as follows.

Six optical fibers can be polished at the same time, and each collet chuck 12 is inserted into the holding hole 5b and held. And the rotating arm stand 5 is connected to each polishing disk 2.
Sequentially rotate and position from 4 to 4 and rough cut.

Wrapped and policed. At this time, when the eccentric shaft 29 of each of the polishing discs is rotated by the drive motor M, the support shaft 29a performs an eccentric movement (crank movement),
The cylindrical ring 36 and the disk 3 that are fitted and supported thereon move eccentrically, and rotate (rotate) as the pinion 36a rolls on the inner periphery of the internal gear 35 in a direction opposite to the direction of the eccentric movement. . Therefore, the polishing sheet 8 is moved by the weight of the collet chuck 12.
The tip end face of the ferrule 11 pressed in the ferrules 1 to S3 is polished with high accuracy with high parallelism, and during this polishing, polishing water cools the ferrule and washes away polishing dust. That is, the eccentrically rotating discs 2 to 4 are rotated by the adjusting screws 38...
・The parallelism is finely adjusted and the surface angle of the ferrule tip face is guaranteed with high accuracy. On the other hand, each disk 2~
4 is detachable from the support shaft 29a of the eccentric shaft 29, so the parallelism can be easily adjusted with the disc removed from the eccentric shaft. In the type equipped with a plate, polishing sheets 81 of various grain sizes are used.
~ During the polishing process of each disk 2 to 4 to which S3 is attached,
It can be replaced quickly and easily and does not reduce polishing efficiency.

As described above, when using the polishing disk rotation drive device adopted in the optical fiber end face polishing machine of the present invention, the rotation drive mechanism of the polishing disk is f1! ! It is neatly structured, allows multiple polishing discs to be compactly installed on one housing, and
The polishing disk can be attached and removed from the eccentric shaft and the parallelism of the polishing disk can be aligned freely, and one end face of the optical fiber can be polished with high precision. Even in a disc-replaceable polishing machine equipped with a disc-replaceable polisher, the discs can be replaced quickly and easily, and high polishing efficiency can be guaranteed.

[Brief explanation of drawings]

FIG. 1 is a plan view of an optical fiber end face polishing device according to the present invention, FIG. 2 is a cross-sectional view showing a rotational drive device for a polishing disk according to the present invention, and FIG. 3 is a bottom cross-sectional view showing an alignment mechanism for the polishing disk. and a side sectional view. 100... Optical fiber end face polishing device, 1...
Housing, 2-4...polishing disk, 5...swivel arm stand, 11...ferrule, 12...collet chuck. 25...Cylindrical base body, 29...Eccentric shaft, 29a-
9... Support shaft, 36... Cylindrical ring, 36a... Pinion, 36b... Flange, 35... Internal gear, 37... Screw, 38... Adjustment Screw, 39... Lock nut, M... Drive motor,
D...Rotation drive device. Applicant Enshu Seisaku Co., Ltd. (a) Bakadan (b)

Claims (1)

[Claims] An end polishing machine that polishes the end face of an optical fiber ferrule with an eccentrically rotating polishing disk, which has a pinion and a flange on a support shaft on an eccentric shaft that is rotatably supported by a cylindrical base on a substrate and rotated by a drive motor. A cylindrical ring is removably fitted and supported, and a pinion of the cylindrical ring that moves eccentrically is meshed with an internal gear fixed to the cylindrical base to impart rotational motion, and a polishing circle is attached to the top of the flange. A rotation drive device for a polishing disk, characterized by a plate fixed in a manner that allows free alignment.