JPH0641204Y2 - Optical repeater terminal optical fiber storage structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a terminal optical fiber housing structure of an optical repeater.

The optical repeater is arranged on the way of a transmission optical fiber cable in which a plurality of optical fibers are integrally formed in an optical transmission system. Then, the terminal optical fiber pulled out from the end of the optical repeater and the optical fiber of the transmission optical fiber cable are connected. The terminal optical fiber of the repeater is generally composed of a surplus optical fiber for transmission line and a surplus optical fiber for test continuous to this. This surplus optical fiber for test is used for various characteristics confirmation tests of the repeater at an optical repeater installation site. At this time, it is used by being connected to various measuring instruments, etc., after the test is completed, it is cut and removed from the extra long optical fiber for the transmission line, and finally the extra long optical fiber for the transmission line becomes the optical fiber of the above optical fiber cable for transmission. It is connected (often a fusion splice).

[Conventional technology]

The conventional optical repeater is not particularly provided with the terminal optical fiber housing structure, and the terminal optical fiber consisting of the extra optical fiber for transmission line and the extra optical fiber for test is It was handled just as it was pulled out from the end of the repeater.

[Problems to be solved by the invention]

In the above-mentioned conventional technique, an operator sometimes mistakenly bends the extra length optical fiber portion for the transmission line during handling of the terminal optical fiber at the time of various characteristics confirmation tests of the optical repeater, and as a result, it is left finally. There is a problem that the extra length optical fiber for the power transmission line is broken. This problem is because the optical fiber is handled almost in the same way as the conventional transmission line of a metal conductor, which is a transmission line medium, and therefore an optical fiber formed by using fragile glass is basically weak against bending. However, it is extremely difficult to surely prevent it only by the operator's attention.

[Means for solving problems]

In order to solve the above-mentioned problems, according to the present invention, in a storage structure for a terminal optical fiber, which is drawn out from an end of an optical repeater, and which comprises a surplus optical fiber for transmission path and a surplus optical fiber for test connected to the optical fiber, An optical fiber storage cylinder is attached to an end of the optical repeater, and an outer peripheral portion of the storage cylinder is divided into two first and second storage areas adjacent in the axial direction,
The first storage area located on the optical repeater side is a substantially closed space due to the partition plate attached to the storage cylinder.
The storage area and the second storage area are separated from each other in the axial direction through the partition plate and are communicated with each other through a communication port defined by the partition plate, and the extra long light for transmission path is provided in the first storage area. A structural feature is that the fiber is wound and housed, and the test surplus optical fiber is wound and housed in the second housing area.

[Action]

In the terminal optical fiber storage structure, the extra length optical fiber for the transmission path of the terminal optical fiber is wound and stored in the first storage area, and the test extra length optical fiber is located outside the first storage area in the axial direction and is partitioned by the partition plate. Since it can be stored in the second storage area, it is possible to carry out the test by handling only the test surplus optical fiber at the time of various characteristics confirmation tests of the optical repeater. It can be surely protected until it is finally connected to the optical fiber.

〔Example〕

1 and 2 are views for explaining an embodiment of the present invention, FIG. 1 is a view showing an embodiment of the present invention, and FIG. 2 is a schematic configuration diagram of an optical repeater.

First, the schematic configuration of the optical repeater will be described with reference to FIG. In the figure, a cylindrical support member 12 is provided at both ends of the optical repeater 11.
Are fitted and fixed. A cable holding member 14 is attached to the outer end surface of each tubular support member 12 via an attachment plate 13. Each holding member 14 has a transmission optical fiber cable 15 formed by integrally incorporating a plurality of optical fibers.
Are respectively inserted and held and fixed. Then, from the inner end face of each holding member 14 (end face on the optical repeater 11 side) to the optical fiber 16 of the optical fiber cable 15 (only one is shown as a representative).
While the terminal optical fiber 17 (only one is shown as a representative) is drawn from both ends of the optical repeater 11.
As will be described later, the terminal optical fiber 17 is composed of a transmission line extra length optical fiber 17a and a test extra length optical fiber 17b (Fig. 1) which is continuous to the transmission line extra length optical fiber 17a. The various characteristic confirmation tests at the installation site of the device 11 are completed, the test excess optical fiber 17b (FIG. 1) is cut and removed, and only the transmission line excess optical fiber 17a remains. Then, the extra length optical fiber 17a for the transmission line and the optical fiber 16 of the optical fiber cable 15 are used.
And are finally fused together. Reference symbol P indicates a fusion splicing portion.

An embodiment of the present invention will be described with reference to FIG.
In the figure, the same parts as those in FIG. 2 described above are designated by the same reference numerals. Therefore, reference numeral 11 is an optical repeater, 12 is a cylindrical support member, and 17 is a terminal optical fiber. These parts are arranged in the same manner as in the case of FIG. The terminal optical fiber 17 is composed of a transmission line extra length optical fiber (plural) 17a drawn from the end of the optical repeater 11, and a test extra length optical fiber 17b provided continuously to this. Reference numeral 20 indicates a terminal optical fiber housing structure which is an embodiment of the present invention. This terminal optical fiber storage structure 20,
Basically, a plurality of support columns 21 are detachably fixed on the end surface 11a of the optical repeater 11 and are fixed on the end surface of the support column 21 with a set screw 22 so as to be removable. A body 23, a first storage area 23a in the form of a groove along the circumferential direction on the outer surface of the cylindrical body 23 on the optical repeater 11 side, and a partition plate 24 for closing the opening of the first storage area 23a. , And a second storage area 25 adjacent to the first storage area 23a via the partition plate. Reference numeral 18 denotes an optical fiber tube for guiding the terminal optical fiber 17 (in this case, the extra length optical fiber for transmission line 17a) pulled out from the end of the repeater 11 to the first storage area 23a. The storage cylinder 23 is formed by molding a resin material or the like, or by pressing a metal plate or the like. The first storage area 23a formed on the outer surface of the storage cylindrical body 23 is surrounded by the outer peripheral wall 23b, and the opening thereof is outward in the axial direction of the storage cylindrical body 23 (the side opposite to the optical repeater 11). It is preferably formed to be open and integrally with the storage cylinder 23. Further, the housing cylindrical body 23 has a ring-shaped collar 23c screwed and fixed on the outer end surface (the end portion of the second housing area on the side opposite to the optical repeater 11 side). The partition plate 24 is formed as a ring-shaped disc that can be slidably fitted to the outer periphery of the storage cylinder body 23, and allows the terminal optical fiber 17 to pass through a part of the inner peripheral end surface facing the outer surface of the storage cylinder body 23. A communication port 24a for that is provided, and is screwed and fixed on the end surface of the outer peripheral wall 23b forming the first storage area 23a. Thus, the first and second storage areas adjacent to each other in the axial direction are separated by the partition plate 24.
Separated by.

The terminal optical fiber storage structure of the present invention constructed as described above
The terminal optical fiber 17 with respect to 20 is stored as follows. First, in the first storage area 23a located on the optical repeater 11 side, the extra optical fiber 17a for the transmission line of the terminal optical fibers 17 is provided.
It is stored by winding. Next, attach the partition plate 24 to the first storage area.
The opening of 23a is closed, and the communication port 2 of the inner peripheral end surface is formed.
The extra optical fiber for test 17b is passed from 4a to be partitioned from the extra optical fiber for transmission line 17a. Next, the ring-shaped brim 23c is attached, and subsequently, the extra test optical fiber 17b is wound and housed in the second housing area 25 formed on the outer surface of the housing cylinder 23 outside the partition plate 24. In this way, the terminal optical fiber 17 is accommodated in a state in which the transmission line surplus optical fiber 17a and the test surplus optical fiber 17b are partitioned in the axial direction by the partition plate 24, and the transmission line surplus optical fiber 17a is stored in the first storage area. Protected by 23a. Therefore, the optical repeater 1
At the time of the characteristic confirmation test of 1, only the test excess optical fiber 17b is handled. Therefore, even if the optical fiber is accidentally broken, only the test surplus optical fiber 17b is broken, and the finally remaining transmission path surplus optical fiber 17a is reliably protected. Then, just before the surplus optical fiber for test 17b is cut and removed and finally the surplus optical fiber for transmission line 17a is connected to the optical fiber 16 (FIG. 2) of the optical fiber cable 15, the housing structure 20 is provided with the optical repeater 11 Removed from.

The present invention is not limited to the above-mentioned embodiment, but can be applied to various modifications based on the gist of the present invention.

[Effect of device]

As described above, according to the present invention, by constructing the terminal optical fiber housing structure as described above, the extra length optical fiber for the transmission line among the terminal optical fibers is finally connected to the optical fiber of the transmission optical cable. The effect that it can be surely protected until it is obtained can be contributed to the improvement of the reliability of the optical repeater.

[Brief description of drawings]

FIG. 1 is a diagram showing a main part of an embodiment of the present invention, and FIG. 2 is a schematic configuration diagram of an optical repeater. In FIGS. 1 and 2, 20 is a terminal optical fiber housing structure of an optical repeater according to an embodiment of the present invention, 11 is an optical repeater, 15 is an optical fiber cable for a transmission line, 16 is an optical fiber, and 17 is an optical fiber. Terminal optical fiber of the repeater (11), 17a is a surplus optical fiber for transmission path, 17b is a surplus optical fiber for test, 21 is a pillar, 23 is an optical fiber storage cylinder (optical fiber storage cylinder), and 23a is the first storage area. , 24 is a partition plate, 25 is a second storage area, and P is an optical fiber connecting portion.

Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location H04B 10/16 9372-5K H04B 9/00 Q

Claims (1)

[Scope of utility model registration request] 1. An optical repeater (11) is pulled out from an end,
A storage structure for a terminal optical fiber (17) consisting of a surplus optical fiber for transmission line (17a) and a surplus optical fiber for test (17b) connected to the optical fiber, which is stored at the end of the optical repeater (11). The tubular body (23) is attached, and the outer peripheral portion of the storage tubular body (23) is axially adjacent to the first,
The first storage area, which is divided into the second two storage areas (23a, 25) and located on the optical repeater (11) side, is substantially closed by the partition plate (24) attached to the storage cylinder. (twenty three
a), and the first storage area and the second storage area (25) are axially separated via the partition plate and communicate with each other via a communication port (24a) defined by the partition plate. The extra length optical fiber (17a) for the transmission line is provided in the first storage area.
And a terminal optical fiber storage structure in which the test surplus optical fiber (17b) is stored in the second storage area.