JPS63283854A - Polishing tool for optical fiber edge surface - Google Patents

Abstract

PURPOSE:To shorten the installation time and polishing time by inserting a plurality of ferrules into penetration holes formed at equal intervals on a concentric circle on a polishing disc member and fixing said ferrules in lump by a fixing member and a fastening member in pairs. CONSTITUTION:A ferrule 10 is inserted into a penetration hole 4 on a polishing disc member 1, and a spring seat metal 12 is loaded onto the flange 11 of the ferrule 10. A fixing member 2 is applied from above so that the upper edge of the ferrule 10 projects from a cut part 6, and the male screw part 7 of a set screw 3 is inserted into the penetration hole 8 on the fixing member 2 and screwed into the female screw part 5 of the polishing disc member 1. At this time, the shoulder part 13 of the set screw 3 presses the upper surface of the fixing member 2, and the undersurface of the fixing member 2 presses the flange 11 of the ferrule 10 onto the upper surface of the polishing disc member 1 through the spring seat metal 12, and the ferrule 10 is fixed onto a polishing tool at the same time.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to optical fiber connection technology, and relates to a tool for polishing the end face of an optical fiber attached to a ferrule. The present invention relates to a polishing tool for polishing the end faces of a plurality of optical fibers at once.

[Prior Art] Conventionally, as a method for attaching an optical fiber and a plurality of ferrules to a polishing tool, as shown in FIG. 3, a V-shaped groove 31 and a holding plate 32 have been used. That is, a plurality of V-shaped grooves 31 are formed on the outer periphery of the polishing tool 33, and in order to fix the ferrule 35 to which the optical fiber 34 is attached to the V-shaped grooves 31, a holding plate 32 and a set screw 36 are used. I was using it.

[Problems to be Solved by the Invention] The conventional polishing tool described above requires a step of tightening a set screw each time one ferrule is attached to the polishing tool. It was troublesome to repeat such operations, and the set screws sometimes came loose during the polishing operation. In general, the number of ferrules that could be attached to the polishing tool at one time was small, 3 to 6, due to the size of the holding plate.

[Means for Solving the Problems] The optical fiber end face polishing tool of the present invention is provided with a plurality of through holes for inserting ferrules at equal angular intervals on the concentric circles of the disc, and a threaded portion at the center of the disc. A polishing disk member provided with a grinding disk member, radial notch grooves opening on the outer periphery of the disk at equal angular intervals equal to the through holes, and an inner diameter larger than the diameter of the threaded portion at the center of the disk. and a fastening member having a threaded portion that can be engaged with the threaded portion and having a portion with an outer diameter larger than the inner diameter of the through-hole of the fixing member,
This solves the above-mentioned problems.

[Example] Next, an example of the optical fiber end face polishing tool of the present invention will be described with reference to the drawings.

FIG. 1 is an exploded perspective view of this embodiment. This polishing tool consists of a circular and relatively thick polishing disc member 1, a circular and relatively thin fixing member 2, and a set screw 3. The polishing disk member 1 is provided with a total of 24 through holes 4 for inserting ferrules at equal angular intervals on two concentric circles. That is, there are 12 through holes 4 on one concentric circle, and they are arranged at angular intervals of 30 degrees. A female threaded portion 5 that engages with the set screw 3 is provided at the center.

The outer diameter of this polishing disk member 1 is 30 mm.

The fixing member 2 has the same outer diameter as the polishing disc member 1, but is relatively thin. This fixing member 2 is provided with twelve radial notches 68 at angular intervals of 30 degrees. The notch 6 is open on the outer periphery of the fixing member 2. In the center,
A through hole 8 having an inner diameter larger than the outer diameter of the male threaded portion 7 of the set screw 3 is provided.

The male threaded portion 7 of the set screw 3 is adapted to engage with the female threaded portion 5 of the polishing disc member 1. Further, the outer diameter of the shoulder portion 13 is larger than the inner diameter of the through hole 8.

Next, a procedure for attaching the ferrule 10 to which the optical fiber 9 is attached to a polishing worker will be explained.

First, the ferrule 10 is inserted into the through hole 4 of the polishing disk member 1. Although two ferrules 10 are shown in FIG. 1, in reality, 24 ferrules are each inserted into the insertion hole 4. Next, a spring washer 12 is placed on the flange 11 of each ferrule 10. Then, the fixing member 2 is placed on top so that the upper end of the ferrule 10 protrudes from the notch 6. After R, the male threaded portion 7 of the set screw 3 is passed through the through hole 8 of the fixing member 2, and the female threaded portion 5 of the polishing disc member 1 is inserted.
Screw into. At this time, the shoulder portion 13 of the set screw 3 presses against the upper surface of the fixing member 2. As a result, the lower surface of the fixing member 2 is connected to the flange 1 of the ferrule 10 via the spring washer 12.
1 onto the upper surface of the polishing disk member 1. This results in
Twenty-four ferrules 10 are simultaneously fixed to the polishing tool.

FIG. 2 is a longitudinal sectional view of the ferrule 10 fixed to a polishing tool. The tip of the ferrule 10 protrudes from the lower surface of the polishing disc member 1 by the amount of polishing.

By rubbing the polishing tools assembled in this manner in a circular motion on a polishing disk, 24 ferrules 10 can be simultaneously polished.

As a modification of the above-mentioned embodiment, a male threaded portion protruding upward is provided at the center of the polishing disk member 1, and a locking nut is prepared instead of the set screw, and this nut is connected to the male threaded portion of the polishing disk member. You may also screw it into the

[Effects of the Invention] As explained above, the present invention is configured such that a plurality of ferrules are inserted into the through holes of the polishing disc member and the ferrules can be fixed at once by a pair of fixing members and a fastening member. Compared to the conventional V-groove force type, ferrule installation can increase the density by more than five times, and the installation time is reduced by 1/10 to 1/20 per ferrule.
It can be shortened to Furthermore, even if a large number of ferrules are attached, the polishing time remains the same, so the optical fiber of the present invention is particularly suitable for splicing 100 or more optical fibers at one place, such as in a multi-core optical fiber splicer. It is convenient to use an edge polishing tool.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of one embodiment of the present invention, and FIG.
FIG. 3 is a longitudinal cross-sectional view of the assembled embodiment of the figure, and FIG. 3 is an exploded perspective view of the conventional example. 1... Polishing disc member 2... Fixing member 3... Set screw 4... Ferrule through hole 5... Female threaded portion 6. ...Notch 7 ... Male thread 8 ... Through hole 9 ... Optical fiber 10 ... Ferrule

Claims (1)

[Scope of Claims] A polished disk member, which has a plurality of through holes for inserting ferrules arranged at equal angular intervals on concentric circles of the disk, and a threaded portion provided at the center of the disk, and which is equal to the through holes. a fixing member provided with radial notch grooves opening on the outer periphery of the disk at equal angular intervals, and a through hole having an inner diameter larger than the diameter of the threaded portion in the center of the disk; An optical fiber end face polishing tool comprising: a fastening member having a threaded portion that can be engaged with the fixing member, and a fastening member having a portion with an outer diameter larger than the inner diameter of the through hole of the fixing member.