JPS623372Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for manufacturing an optical communication line with extra length, in which an optical fiber wire or core wire is housed with extra length in a plastic pipe.

As shown in FIG. 1, an optical communication line 3 with an extra length has been proposed in which an optical fiber wire or core wire 2 is housed with an extra length in a pipe 1.

In such an optical communication line 3 with extra length, even if tension is applied and the pipe 1 is stretched, the internal optical fiber wire or core wire 2 has extra length, so no tension is applied and it is weak against tension. There is an advantage that the optical fiber strand or core wire 2 can be protected from tension.

Conventionally, such an optical communication line 3 with extra length has been manufactured as shown in FIG. That is, from the strand or core wire supply 4 to the optical fiber strand or core wire 2
is supplied to a crosshead 6 of an extruder 5, and while passing through this crosshead 6, a plastic pipe 1 having an inner diameter larger than the outer diameter of the optical fiber strand or core 2 is extruded and coated around the outer periphery of the optical fiber strand or core 2. The optical communication line thus obtained is sent to a cooler 7 consisting of a water tank, and the pipe 1 is cooled.
When the pipe 1 is cooled, its length shrinks, and the length of the optical fiber strand or core 2 in the pipe 1 becomes relatively longer, and the length of the optical fiber strand or core 2 in the pipe 1 becomes longer. An extra length is provided, and the optical communication line 3 with the extra length is sent out from the cooler 7 and wound up by a winder 8.

However, in this type of manufacturing equipment for optical communication lines with extra length, the extra length is added by utilizing the shrinkage of the length of the pipe 1, so the shrinkage rate differs depending on the material of the pipe, so the extra length depends on the material of the pipe. There were disadvantages in that the lengths were added in different ways, and there were also cases in which it was not possible to provide the necessary extra length.

An object of the present invention is to provide an apparatus for manufacturing an optical communication line with extra length that can reliably provide a necessary amount of extra length regardless of the material of the pipe.

The present invention supplies optical fiber strands or cores from a strand or core supply to an extruder crosshead,
In an apparatus for manufacturing an optical communication line with extra length by extruding a plastic pipe having an inner diameter larger than the outer diameter around the outer circumference of the optical fiber strand or core wire and passing it through a cooler, the wire is sent out from the cooler. a speed sensor that detects the moving speed of the plastic pipe of the optical communication line with extra length; a feeder that feeds the optical fiber strand or core wire into the crosshead of the extruder; and a speed signal from the speed sensor. A feeding speed controller that controls the feeding speed of the feeding machine so that the optical fiber strand or core wire is fed into the extruder crosshead at a speed faster than the speed signal by an amount corresponding to the extra length. It is characterized by having the following.

An embodiment of the present invention will now be described in detail with reference to the drawings. Fig. 3 shows a first embodiment of the present invention. The same reference numerals are used for parts corresponding to those in Fig. 1. In this embodiment, the manufacturing apparatus for optical communication cable with slack is provided with a feeder 9 between the bare wire or core wire supply 4 and the extruder crosshead 6, for feeding the optical fiber bare wire or core wire 2 into the extruder crosshead 6. In this embodiment, an endless track type feeder 9 is used. A speed sensor 10 is provided between the cooler 7 consisting of a water tank and the winder 8 to detect the moving speed of the plastic pipe 1 on the surface of the optical communication cable with slack 3. A speed signal from the speed sensor 10 is provided to a speed controller 11. The speed controller 11 is connected to the speed sensor 10.
Based on the speed signal from the extruder 6, the feeding speed of the feeding machine is controlled so that the optical fiber strand or core wire 2 is fed into the extruder crosshead 6 at a speed faster than the speed signal by an amount corresponding to the extra length provided.

Such a device forcibly feeds the optical fiber strand or core 2 into the extruder crosshead 6 while controlling the feeding speed with a speed controller 11. Speed controller 11
Based on the speed signal from the speed sensor 10 that detects the moving speed of the plastic pipe 1 after it has been cooled and shrunk in the cooler 7, the optical fiber element is moved at a speed corresponding to the extra length that is faster than the speed signal. Since the feeding speed of the feeder 9 is controlled so as to feed the wire or core wire 2, the required extra length can be reliably provided to the extra length optical communication line 3.

FIG. 4 shows a second embodiment of the present invention. The manufacturing apparatus of the optical communication line with extra length according to this embodiment is as follows:
This figure shows an example in which the apparatus shown in FIG. 3 is arranged vertically. Even in this case, the same effect as that shown in FIG. 3 can be obtained. In particular, when the apparatus is configured as in this embodiment, the occupied floor space can be reduced.

The optical fiber wire is one in which a primary coating is provided on the outer periphery of an optical fiber, or one in which a buffer layer is further provided on the outer periphery of the primary coating.

The optical fiber core wire is obtained by covering the outer periphery of this optical fiber wire with an outer covering such as a secondary coating.

The plastic pipe 1 may have a metal-plastic laminate tape layer on its inner surface.

As explained above, the apparatus for manufacturing an optical communication line with extra length according to the present invention uses a speed sensor to detect the moving speed of the plastic pipe on the surface of the optical communication line with extra length sent out from the cooler. Based on the speed signal of Since this is done using a container, the required extra length can be reliably provided regardless of the material of the plastic pipe. Further, in the present invention, since the moving speed of the plastic pipe after passing through the cooler is detected to determine the feeding speed, there is an advantage that the shrinkage of the plastic pipe is not taken into account.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing an example of an optical communication line with extra length, FIG. 2 is a schematic configuration diagram of a conventional device, and FIGS. 3 and 4 are first and second embodiments of the device according to the present invention. It is a schematic block diagram of an example. 1...Plastic pipe, 2...Optical fiber wire or core wire, 3...Optical communication line with extra length, 4...
Element wire or core wire supply, 6... Extruder crosshead, 7... Cooler, 8... Winder, 9... Feed machine, 10... Speed sensor, 11... Speed controller.

Claims (1)

[Scope of utility model registration request] An optical fiber strand or core wire is supplied from a strand or core wire supply to an extruder crosshead, and a plastic pipe having an inner diameter larger than the outer diameter is extruded and coated around the outer periphery of the optical fiber strand or core wire, and a cooler is formed. In an apparatus for manufacturing an optical communication line with extra length through a plastic pipe, a speed sensor for detecting the moving speed of the plastic pipe of the optical communication line with extra length sent out from the cooler, and a crosshead of the extruder are provided with the optical fiber. A feeding machine that feeds the bare wire or core wire,
Based on the speed signal from the speed sensor, the feeding speed of the feeder is set so that the optical fiber strand or core wire is fed into the extruder crosshead at a speed faster than the speed signal by the amount of extra length. What is claimed is: 1. An apparatus for manufacturing an optical communication line with extra length, characterized in that it is equipped with a feeding speed controller for controlling.