JPH0223251B2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to submarine optical cables using optical fibers as transmission media, and in particular, to a pressure-resistant layer of submarine optical cables that protects optical fibers (units). The present invention relates to a method for manufacturing divided metal pieces.

(Conventional technology) Optical fiber has characteristics such as low loss, wide bandwidth, and light weight, so it is economically advantageous to use it in submarine optical cables that transmit large amounts of information over long distances. Figure 10 shows an example of the cross-sectional structure of such a submarine optical cable, where 1 is an optical fiber unit;
Reference numeral 2 denotes a metal pressure-resistant layer that protects the optical fiber unit 1 from high water pressure and is also used as a power supply path.This voltage-resistant layer 2 is divided into three fan-shaped pieces 2a, 2b, It is composed of 2c vertically aligned. The gap 3 of the pressure-resistant layer 2 is filled with a compound, and the compound is also filled in the gaps 3 of the tensile strength wires and metal tubes inside and outside the pressure-resistant layer 2, mainly to prevent water running. It is. 4 is a tensile strength wire twisted around the outer periphery of the pressure-resistant layer 2, which mainly adds tensile strength to the submarine optical cable. Reference numeral 5 indicates a metal tube to which the tensile strength wire 4 is fixed, and the gaps between these tubes are also filled with compound. 6 is an insulating layer made of plastic or the like.

Note that the outer periphery of the insulating layer 6 may be provided with an exterior covering to prevent damage to the cable, if necessary.

The characteristics of such submarine optical cables are
As described in Japanese Patent No. 7361, the divided pieces 2a, 2b, and 2c constituting the pressure-resistant layer 2 have characteristics.

That is, since the pressure-resistant layer 2 is fixed to the outer periphery of the optical fiber unit 1 by vertically aligning the divided pieces 2a, 2b, and 2c, it has a thickness that can sufficiently protect the optical fiber unit 1 even under high water pressure. It has the advantage that it can be made thicker, and also has the advantage that the transmission characteristics of the optical fiber are not impaired because the pressure-resistant layer is not heated and formed during manufacturing. Further, it has advantages such as being able to function as a tension member.

(Problem to be solved by the invention) However, such divided pieces 2a, 2
b and 2c, when forming the pressure-resistant layer 2, it is required to finish the surface with the highest possible precision so that there are no steps on the inner and outer peripheral surfaces, but due to vertical alignment, the pressure-resistant layer 2 Because of the structure, when bending stress etc. are applied, the divided pieces 2
There is a problem in that the mutual bonding surfaces of a, 2b, and 2c are displaced or depressed, and therefore, even if the inside of the pressure-resistant layer 2 is filled with a compound, the water running effect is not sufficiently exhibited. In particular, the optical fiber unit 1
Since it is not possible to apply a large contact force to the pressure-resistant layer 2 and the optical fiber unit 1, the interlayer adhesion between the pressure-resistant layer 2 and the optical fiber unit 1 is low, and there is a fear of water running. The joint surface is also filled with compound, but there is a sufficient risk of water running on this joint surface as well.

This problem can be solved by applying a satin finish to the circumferential surface of each divided piece to effectively prevent water running. However, applying a satin finish to the divided individual pieces means that the depth of the groove is small. Therefore, it is difficult to achieve satin finish by shot blasting etc.

In view of the actual situation, the present invention uses a working roll having a satin-finished portion on the outer circumferential surface of the divided metal pieces constituting the pressure-resistant layer, so that the divided metal pieces with a slight satin-finished portion can be produced. The purpose of this invention is to provide a manufacturing method for continuously producing .

(Means for Solving the Problems) The technical means taken by the present invention to achieve the above-mentioned object are characterized by the fact that a metal material having a satin finish is subjected to satin finish processing by passing the metal material through a processing roll. In the method for manufacturing a material, the metal material is a pressure-resistant layer of a submarine optical cable formed by combining individual metal pieces having a curvature shape or a tapered shape, and the metal material is shaped into the shape of the metal pieces on the outer peripheral surface of the plurality of processing rolls. A molding path is formed so that the divided metal pieces pass through the molding path, and a satin finish is applied to the metal pieces by a satin finish section previously formed on the processing roll.

(Example) In FIG. 1, 10 is a first roller shown by a smooth roll.
The processing roll 11 is a second processing roll shown as a matte finish roll, and both rolls 10 and 11 are rotatable in the direction of the arrow.

Here, the term "freely rotatable" includes a case where it rotates freely and a case where one or both of them are actively rotated at the same speed.

12 is a pair of feed rolls, and 12A is a pair of feed rolls.
It is possible to continuously insert the molding passage 14 into a forming passage 14 having a sector-shaped cross section and formed by the outer circumferential surfaces of the rolls 1 and 1.

Referring to FIG. 2, the first processing roll 10 has a concave circumferential curved surface 1 on its body through a pair of tapered circumferential surfaces 15.
6, and the second processing roll 11 is provided with a circumferential groove having a tapered circumferential surface 18A that receives and supports the tapered circumferential surface 15 by slidingly contacting the tapered circumferential surface 15 in a recessed manner. The bottom of the groove has a convex circumferential curved surface 18 on which a molded part 19 is formed, and both molded parts 17 and 19 form a molded passage 14 having a fan-shaped cross section.

In the embodiment shown in FIG. 2, the tapered peripheral surface 1 of the molded part 19
8A and the convex circumferential curved surface 18 are formed with a matte textured portion 20 which is made uneven by, for example, shot blasting, and the processed portions 20 have, for example, 50 to 30 in 1 mm ² and are deep. The diameter is said to be 0.01 to 0.1 mm.

In the embodiment shown in FIG.
A matte textured portion 20 is formed only on the surface.

In any case, the forming portions 17 and 19 of the first processing roll 10 and the second processing roll 11 constitute a forming passage 14 having a fan-shaped cross section, and in this example, the tapered peripheral surface 1
Relative misalignment in the axial direction of the rolls is regulated through the engagement and sliding contact between the rolls 5 and 17, and alignment is possible.

Therefore, according to the apparatus shown in the above-described example, the metal material deformed wire 13, which has a substantially fan-shaped cross section by wire drawing or extrusion, is transferred between the first processing roll 10 and the second processing roll 11 via the feed roll 12. In the process of being continuously inserted into the forming passage 14 and sent out by the delivery roll 12A, the satin-finished portion 21 is formed by the satin-finished portion 20 on both the inner circumferential surface and the abutting surface in the example shown in FIG. The deformed wire 13A, that is, the divided individual pieces shown in FIG. The irregular shaped wire 13A shown will be manufactured continuously.

In addition, in FIGS. 2 and 3, G is a roll gap, and within this range, a pressing force is applied to either or both of the first processing roll 10 or the second processing roll 11 by a pressing force and holding mechanism (not shown). It is adjustable.

In addition, the deformed wire 13A shown in FIG. 6 has a satin-finished portion 21 and a plain portion 21A alternately formed on the inner peripheral surface in the longitudinal direction of the wire, which is similar to that in FIG. 1 in the second processing roll 11 in FIG. It can be manufactured by using a processing roll 11 in which the reference numeral 11A shown in FIG.
In the second processing roll 11 shown in FIG. 2, by alternately forming processed portions 20 and smooth portions, a deformed wire having plain portions and satin portions alternately not only on the inner circumferential surface but also on the abutting surface is manufactured. be able to.

In the illustrated example described above, the forming portion 17 of the first processing roll 10 is a smooth portion and does not have the satin-finished portion 20;
By forming this, the satin-finished portion 21 can also be formed on the outer peripheral surface. In addition, the first processing roll 10,
The second processing roll 11 has a satin-finished portion 21 formed on both sides, so that it can have the satin-finished portion 21 all over.

Furthermore, in the above example, the irregularly shaped line 13A, that is, the divided individual pieces are fan-shaped in cross section, but in the case of the pressure-resistant layer shown in FIGS. 7 to 9, the cross-sectional shape of the divided individual pieces is not shown. Irregular street line 13
B, 13C, and 13D, and when manufacturing these tapered deformed wires 13B, 13C, and 13D, the molding passage 14 is shaped to match these.

(Effects of the Invention) The present invention provides a method for manufacturing a metal material having a satin finish by passing the metal material through a processing roll, in which the metal material combines individual metal pieces having a curvature shape or a tapered shape. A pressure-resistant layer of a submarine optical cable consisting of a plurality of processing rolls, forming a forming passage matching the shape of the metal segment on the outer circumferential surface of the plurality of processing rolls, and forming a forming passage corresponding to the shape of the metal segment when the metal segment passes through the forming passage. Since the processing roll is characterized in that a matte finish is applied to the matte finish part formed in advance, the adhesion surface area is increased and waterproofness and water immersion prevention properties are significantly improved. It has the advantage of being able to mass produce individual pieces in succession.

In the embodiment, only one pair of the first processing roll 10 and the second processing roll 11 is provided, but a plurality of sets of both rolls may be provided in the manufacturing direction.

[Brief explanation of drawings]

Figure 1 is a front view of the device used in the present invention, Figure 2 is a front view of the device used in the present invention;
The figure is an arrow view taken along the line A-A in Figure 1, Figure 3 is an arrow view of the second embodiment seen from the same direction as Figure 2, and Figures 4 to 6 are a variant obtained by the present invention. A perspective view showing three examples of wires, FIGS. 7 to 9 are explanatory views of each combination state showing other examples of divided pieces obtained by the present invention, and FIG. 10 shows a conventional cable. FIG. 10...First processing roll, 11...Second processing roll, 14...Forming passage, 21...Nearly textured portion.

Claims (1)

[Scope of Claims] 1. A method of manufacturing a metal material having a satin finish by passing the metal material through a processing roll, wherein the metal material is formed by combining individual metal pieces having a curvature shape or a tapered shape. A pressure-resistant layer of a submarine optical cable that is processed, and forming a forming passage matching the shape of the metal segment on the outer peripheral surface of the plurality of processing rolls, and forming a forming passage corresponding to the shape of the metal segment when the metal segment passes through the forming passage. A method for manufacturing individual metal pieces constituting a pressure-resistant layer of a submarine optical cable, the method comprising applying a satin finish to a roll using a matte finish formed in advance on a roll.