JPH0327281B2 - - 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). This invention relates to an apparatus for manufacturing divided individual pieces, that is, deformed wires.

(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. There is.

FIG. 7 shows an example of the cross-sectional structure of such a submarine optical cable, where 1 is an optical fiber unit, 2 is an optical fiber unit, and 2 is an optical fiber unit.
is 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, and this voltage-resistant layer 2 is divided into three fan-shaped pieces 2a, 2b, and 2c. It is made up of vertically aligned pieces. The gap 3 in the pressure-resistant layer 2 is filled with a compound, and this compound is also filled in the gaps 3 between the tensile strength wires and metal tubes inside and outside the pressure-resistant layer 2, mainly to prevent water running. It is something. 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. 5 is a metal tube that fixes the above-mentioned tensile strength wire 4, and these gaps 3
is 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
When the pressure-resistant layer 2 is formed, it is required to finish the surface with the highest possible accuracy to prevent the formation of steps on the inner and outer peripheral surfaces of 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.

Therefore, it has been proposed to effectively prevent water running by applying a satin finish to the circumferential surface of each divided piece, thereby forming a pressure-resistant layer for a highly reliable submarine optical cable. It is difficult to do so because the depth of the Nasashi graben is very small.

In view of the above circumstances, the present invention provides the following steps in the production of a metal material deformed wire having a fan-shaped cross section and constituting a pressure-resistant layer.
The purpose of the present invention is to provide a manufacturing device which is capable of increasing the contact area by forming a satin-finished concave portion on the inner circumferential surface thereof.

(Means for Solving the Problems) The technical means taken by the present invention to achieve the above-mentioned objects are characterized by the use of a metal wire having a fan-shaped cross section and a deformed metal wire constituting a pressure-resistant layer that protects an optical fiber unit. The device is manufactured by rolling a pair of rolling rolls, and the pair of rolling rolls 10 and 11 have a concave peripheral curved surface 1 between a pair of tapered peripheral surfaces 15 and 15 formed on the body.
The first processing roll 1 is equipped with a forming section 17 having 6
0 and a pair of tapered peripheral surfaces 18A, 1 formed on the body.
A second processing roll 11 is provided with a forming part 19 having a convex circumferential curved surface 18 between 8A, and a satin finish part 2 is provided on at least one of the forming parts 17 and 19.
0, and the tapered peripheral surface 1 of both molded parts 17, 19
5 and 18A are in sliding contact with each other, and the concave circumferential curved surface 16 and the convex circumferential curved surface 18 are aligned, forming a molded passage 14 having a fan-shaped cross section.
It is at the point where it has.

(Example) In FIG. 1, 10 is a first roller shown by a smooth roll.
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, and a molded part 19 is formed therein. This constitutes a forming 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, a satin-finished portion 20 is formed by, for example, shot blasting, and the treated portion 20 has a grain size of, for example, 50 to 30 per mm ^2.
The depth 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.

In the above illustrated example, the forming portion 17 of the first processing roll 10 is a smooth portion, and the forming portion 1 of the second processing roll 11 is a smooth portion.
9 has a satin finished part 20, but the forming part 17 of the first working roll 10 may have the satin finishing part 20, and the forming part 19 of the second working roll 11 may have a smooth part. According to the invention, there is a satin-finished portion 21 on the outer peripheral surface.
is formed. Further, in the case where the matted portions 20 are formed on both molded portions 17 and 19, the matted portions 21 are formed on the inner and outer circumferential surfaces.

Therefore, according to the embodiment of the present invention, the metal material deformed wire 13 which has been made into 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 irregularly shaped wire 13A shown in FIG. 4 is continuously produced with a fan-shaped cross section while the irregularly shaped wire 13A shown in FIG. 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 the second processing roll 11 in which a portion 11A shown in the drawing is formed as a satin finish portion 20 and a portion 11B shown as a smooth portion is alternately formed. 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.

(Effects of the Invention) The present invention is an apparatus for manufacturing a deformed metal wire having a fan-shaped cross section and constituting a pressure-resistant layer for protecting an optical fiber unit by rolling with a pair of rolling rolls, wherein the pair of rolling rolls 10 and 11 are , a concave circumferential curved surface 1 between the pair of tapered circumferential surfaces 15, 15 formed on the body.
The first processing roll 1 is equipped with a forming section 17 having 6
0 and a pair of tapered peripheral surfaces 18A, 1 formed on the body.
A second processing roll 11 is provided with a forming part 19 having a convex circumferential curved surface 18 between 8A, and a satin finish part 2 is provided on at least one of the forming parts 17 and 19.
0, and the tapered peripheral surface 1 of both molded parts 17, 19
5 and 18A are in sliding contact with each other, and the concave circumferential curved surface 16 and the convex circumferential curved surface 18 are aligned, forming a molded passage 14 having a fan-shaped cross section.
Since it is characterized by having the following characteristics, it has the advantage that it is possible to continuously mass-produce wires of cross-sectional metal material irregular shapes for pressure-resistant layer structures, which have an increased adhesion surface area and greatly improved waterproofness and water-proofing properties.

In particular, the tapered peripheral surfaces 15, 1 of the molded parts 17, 19
8A are in sliding contact and the concave circumferential curved surface 16 and the convex circumferential curved surface 18 are aligned, so that there is no deviation in the roll axis direction and it is possible to obtain the deformed wire 13A with an accurate shape.

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 a diagram indicated by the arrows A-A in Figure 1, Figure 3 is an arrow diagram of the second embodiment seen from the same direction as Figure 2, and Figures 4 to 6 are the irregular shapes obtained by the present invention. FIG. 7 is a perspective view showing three examples of cables, and FIG. 7 is a sectional view showing a conventional cable. 10...First processing roll, 11...Second processing roll, 14...Forming passage, 15, 18A...Tapered circumferential surface, 16...Concave circumferential curved surface, 17, 19...Forming part, 18...Convex Circumferential curved surface, 20... satin finished part.

Claims (1)

[Scope of Claims] 1. An apparatus for manufacturing a metal material deformed wire having a sector-shaped cross section constituting a pressure-resistant layer for protecting an optical fiber unit by rolling a pair of rolling rolls, the pair of rolling rolls 10 and 11 comprising: A concave circumferential curved surface 1 is formed between the pair of tapered circumferential surfaces 15 and 15 formed on the body.
The first processing roll 1 is equipped with a forming section 17 having 6
0 and a pair of tapered peripheral surfaces 18A, 1 formed on the body.
a second processing roll 11 having a forming part 19 having a convex circumferential curved surface 18 between 8A; a satin finished part 20 on at least one of the forming parts 17, 19; The tapered circumferential surfaces 15 and 18A of the cable are in sliding contact with each other, and the concave circumferential curved surface 16 and the convex circumferential curved surface 18 are aligned to constitute a cylindrical pressure-resistant layer of a submarine optical cable. A device for manufacturing irregularly shaped metal wires with a sector-shaped cross section.