JPS58115404A - Optical fiber terminal processor - Google Patents

Abstract

PURPOSE:To prevent a connection loss of an optical transfer quantity in case of junctioning an optical fiber, by finishing a cut end face of an optical fiber made of plastic, to a specular surface having no burr. CONSTITUTION:A fiber 1 is fitted into a lead-in hole 9, is led into a cylindrical guide 5, also is inserted through a burr cut ring 3, and as for its tip part, a finish allowance delta of the end face is projected from a knife part 10. The final finish allowance delta1 is a total of delta and delta2 in the knife part 10. As for the part of the finish allowance delta1, a burr 8 is generated on the outside circumference of the knife part 10. Subsequently, a specular surface of a specular surface plate 6 is cooled by a cooling device consisting of a cooling pipe, and when the specular surface plate 6 is slide-moved backward to the opposite fiber 1 side after the end face of the fiber 1 has been cooled enough, the burr cut ring 3 cuts off the burr 8 generated up to the finish allowance delta2 pushed up by a reduction resisting spring 4, so as to extrude from the end part of the fiber 1.

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Purpose of the present invention The purpose of the present invention is to provide an optical fiber one-terminal body finishing device that finishes the cut end face to a mirror finish without any blemish by applying a method for processing the end face of a plastic optical fiber. .

(2) Disadvantages of the conventional method A method of pressing a heated mirror plate @ on the cut end face of a plastic fiber optical fiber ■ to make one end face of the fiber a mirror finish (
This is shown in Japanese Utility Model Application Publication No. 56-86807. ) had drawbacks (1) to (3) described below.

(2) IJG"l is generated at the outer peripheral end of one end face of the fiber (FIG. 1 shows this).

■It is difficult to press the mirror surface of the heated mirror plate (b) at right angles to the fiber axis, and the fiber axis and end face cannot be finished at right angles (
Figure 2 shows this. ).

(2) Due to the above-mentioned (2), optical axis misalignment occurs due to Paris θ during setting to a connector or splicer.

Furthermore, the paris θ falls off and adheres to one end face of the fiber, increasing splice loss.

(2) Due to the above-mentioned (2), a gap is created at the abutting end surfaces of the seven eyers, increasing connection loss in optical transmission.

(3) Configuration and operating state of the present invention The present invention seeks to eliminate the above drawbacks.

The present invention will be explained below based on an embodiment shown in FIGS. 3 to 6.

As shown in Figure 3, a heating device (7), a cooling device (11)
) inside and whose top surface has a substantially flat mirror surface (the button is a cylindrical guide (5) with an introduction hole (9) at one end into which the fiber (1) is fitted). The fiber (1) is fitted into the fiber (1) so as to be slidable in the axial direction of the fiber (1), and the mirror surface of the mirror plate (2) is perpendicular to the axial direction of the fiber (1).

The lower end of the paring ring (3) has a knife portion (lO) sharply formed in the inner circumferential direction, and the inner circumference is covered with fibers (
1) so as to be slidably fitted on the outside. The knife portion (10) of the paring ring (3) is in close contact with the fiber (1), but its inner surface towards the top has an angle # as shown in the figure.
1 and expands, and escapes far from the outer circumference of the fiber (1), resulting in a loosely fitted state.

Also, the outer circumference of this crisp ring (3) is a cylindrical guide (5).
), so that the crisp ring (3) slides in the axial direction of the introduction hole (9), and the anti-squeezing strip (4) is fitted on the side opposite to the knife part (10). It is supported on the introduction hole (9) side through. The knife part (10) is designed to slide.

The state of use will be explained below.

As shown in Figure 4, the fiber (1) is inserted into the introduction hole (9).
The fiber (1) is fitted into the cylindrical guide (5) and inserted into the cylindrical guide (5), and the paring ring (3) is inserted therethrough, so that the tip of the fiber (1) is made to protrude from the knife portion (10) at the finishing margin (Jl) of the end surface. The final finishing margin (Jl) is this finishing margin (J) and the finishing margin (J) inside the knife part (lO).
).

Next, as shown in Fig. 5, the heating device (7) is a heater.
) to heat the mirror surface of the mirror plate (6) to a temperature higher than the melting point of the fiber (1), and slide and press the mirror plate (6) toward the end surface of the rough eye/j7+11 inside the cylindrical guide (5). Finish the end surface to a smooth mirror surface. Due to this suppression, the anti-shrinkage strip (4) that supports the crisp ring (3) shrinks a little, so this shrinkage margin (a8) also becomes the finishing margin.

At this time, the finished white (al) portion melts and causes cracking on the outer periphery of the knife portion (10) as shown in FIG.

Next, as shown in Figure 6, a cooling device (11) consisting of cold water pipes
After the mirror surface of the mirror plate (6) is cooled and the end face of the fiber (1) is sufficiently cooled, the mirror plate (6) is slid back toward the anti-fiber mountain side, and the crisping ring (3) cuts into the anti-squeezing fiber (4).
) was pushed down to the finish line (su), which occurred (
8) is cut out so as to be pushed out from the end of the fiber (1).

(4) Effects of the present invention According to the present invention, the fiber (1) is fitted and inserted through the introduction hole (9) to align with the axial direction of the cylindrical guide (5), and the mirror plate (6) is Since the mirror surface is fitted to the cylindrical guide (5) so that it can move back and forth at right angles to the axial direction, the mirror surface is pressed at right angles to the axial direction of the fiber (1), and the end surface of the fiber (1) is pressed against the shaft. Finished at right angles.

In addition, a mirror plate (
6), the knife portion (10) of the paring ring (3) pushed out from the anti-collapsing strip removes the generated paris (8).
) on the end face of the fiber (1).
) is finished neatly without leaving any residue, and as a result, connection loss in the amount of light transmission when fiber (1) is spliced is prevented.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a conventional example, and FIGS. 2 to 4 are sectional views showing an embodiment of the present invention. Patent applicant Matsushita Electric Works Co., Ltd. Patent attorney Toshimaru Takemoto (and 2 others)

Claims (1)

[Claims] (1) An introduction hole for introducing the optical fiber is opened at one end of the cylindrical guide, and a knife part is formed at the end of the cylindrical guide on the introduction hole side through the anti-squeezing strip, and the knife part is placed on the side opposite to the introduction hole. The T14 surface is formed into a mirror surface, and the mirror plate in which the heating device and the cooling device are arranged is slidably inserted into the cylindrical guide while facing the knife portion of the paring ring. An optical fiber one-terminal assembly device made by mating.