JPS60154829A - Stranding method of deformed wire rod - Google Patents

Abstract

PURPOSE:To perform stranding without leaving a residual stress in a deformed wire rod stranded by an untwistable system by providing a twist to each of said wires to strand them around a core wire with a planetary system and annealing them for removing the strain of each wire thereafter. CONSTITUTION:A twist is provided to a deformed wire rod 7 to be taken up by a bobbin 12 by passing it through a guide plate 9 and preforming rolls 10, both of which are rotated synchronously with the bobbin 12. Plural number of the wire rods 7 are sent to a planetary type stranding machine of untwistable system. A core wire 2 such as an optical fiber unit is fed by rotating a guide plate 16 and preforming rolls 17 synchronously with the planetary motion of each bobbin 12. When respective wire rods 7 are revolved in the arrow 19 direction, the wire rods 7 are stranded around the core wire 2 at the position of an assembling die 18, to achieve a desired stranding. This strand is introduced to a heat treating device such as a high-frequency induction heating device, to remove the strain of each wire in a state of constraining the stranded form.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention is directed to the method of twisting irregularly shaped wires. The stranded wires obtained by the method of the present invention typically include stranded overhead wires such as overhead ground wires or overhead transmission lines, but also include stranded wires such as ropes. Note that the present invention is particularly advantageous when applied to an optical composite overhead ground line equipped with an optical transmission function.

BACKGROUND OF THE INVENTION OR PRIOR ART For example, the oldest overhead ground wire that has been used is an aluminum sheathed wire with a circular cross section. [11 and/or aluminum alloy wire is used, and is constructed by twisting, for example, six strands around one wire. However, recently, with the spread of optical transmission, this overhead ground wire has been provided with an optical transmission function in order to make efficient use of the overhead ground wire.

The overhead ground wire that has an optical transmission function uses an optical fiber unit for its center wire.

There are various types of optical fiber units, but most of them are typically of a type in which an optical fiber core is housed in a pipe made of aluminum or an alloy thereof. However, optical fiber units have a lower tensile strength than ordinary wires, and when optical fiber units are used in this way, the strength of the overhead ground wire as a whole is reduced. Therefore, in order to cape the required 41A degree as an overhead ground wire, we decided to
However, if such measures were simply carried out, the outer diameter of the overhead ground wire (t = a) would increase, making the wind pressure more manageable. ξ The number of receiving numbers increases, and if we consider the use of the overhead ground wire, it can be seen that this does not lead to very favorable results.

I・KO(°, increase the cross-sectional area of each strand while reducing the 51'1 diameter of the whole strand wire t! Increasing the strength'
As for lJ payment, the following proposal f was made. The rope too,
Light) 7/ The cross section of the wires twisted around the Ibaconite is substantially fan-shaped, and the outer surface of the twisted overhead ground wire is formed into a substantially cylindrical periphery. Note that the fan shape here refers to the part sandwiched between two concentric circles.
It has a C-divided shape with a cutting axis pointing in the radial direction. When a stranded wire is constructed using strands having such a cross-sectional shape.

Not only is the tensile strength improved without increasing the outer diameter of the stranded wires, but the bridging effect of each strand that makes up the M-wire layer reduces the pressure from the surroundings applied to the optical fiber unit passing through the center. It also has the additional effect of alleviating the

However, in the case of irregularly shaped wires having irregularly shaped cross sections such as fan shapes, the I! Several similar problems are encountered in the IIN process. Conventional wire twisting methods are roughly divided into two types in terms of lit type, one of which is the so-called "J type with twisting", and a wire twisting machine that performs this type of twisting is There is a "planetary type stranding machine" or a "tubular type N1N11A". Another type of M-wire is the so-called RM non-return type, and an example of a wire twisting machine that performs this type of twisting is the F-rigid type wire twisting machine.

In the "with twist" type, the bobbin that supplies the strands rotates 3I2 around the center wire while keeping its axial direction constant.
It is something that undergoes u motion. Therefore, the inclination posture on the cross section of each strand twisted around the center wire remains constant, and the wires are twisted around the center wire (- spirally wound?
I'm going to be happy. However, if the cross-sectional shape of the cable wire is circular, even with this MS wire system, it is possible to create a state in which the τ-layer wires are arranged on the outer circumferential surface of the central wire. However, it is not possible to use the unique thread line (2), which has a fan-shaped irregular cross section, in a pure manner.

On the other hand, according to the 25th wire of the non-twisting method, the above-mentioned irregularly shaped wires can be twisted together in close surface contact with the outer peripheral surface of the center wire.

However, Yuki III, who was punished by this h-type.
A large stress remains, and unless this stress is removed, P5fG= with good performance cannot be obtained. As for the stranded wire, Naso's 1゛hara GJ J /
71, no untwisting (untwisting) of the entire B wire, and no undulations (ii) (to be straight as a whole). however,
If the wire is twisted in the 1-no-twist method, the above-mentioned performance required for the twisted wire cannot be met due to the residual stress of the 1M jFl wire. Therefore, conventionally,
When the wires are twisted using the non-twisting method, the wires are passed through a post-forming step after the twisting step to remove residual stress inside the strands. This post-forming step is carried out by applying pressure from the outside of the stranded wire, for example with a post-forming roller.

However, even if this postform process is carried out, all the problems caused by the non-twisting J method will not be solved.

First, for materials with high tensile strength, such as copper wire, residual stress cannot be completely removed by the post-forming process alone. In addition, especially in the case of stranded wires in which the optical fiber unit is the central wire rod as described above, the optical fiber unit may be damaged by this postform process. In other words, the postform The pressure applied during the process may dent the vibrator that makes up the outer periphery of the optical fiber unit, crushing the optical fiber inside, or the tension applied by the rollers used in the postform process may cause the optical fiber inside to collapse. may be cut off.

OBJECTS OF THE INVENTION According to the twisted wire of the above-mentioned "with twist" method, at least the problems caused by residual stress that occur in the "no twist" method are solved. Therefore, it is preferable to use this "untwisted" type of stranded wire for the stranded wires of irregularly shaped wires.

Therefore, the purpose of this invention is to use a "twisting" type Wi
It is an object of the present invention to provide a method for twisting irregularly shaped wires, which can be used to form wires.

Summary of the Invention The wire twisting method of the present invention is directed to a method of twisting a plurality of deformed wires around a center wire. This method includes the following steps.

In other words, there is a process of imparting a helical twist to each irregularly shaped wire, and then twisting the twisted multiple irregularly shaped wires around a central wire in a planetary type (“untwisted” method). and a step of heat-treating the irregularly shaped strands thus twisted to remove distortion.

Preferably, the heat treatment performed to remove distortion of the deformed east wire is performed in an in-line process before winding M@ consisting of a plurality of twisted deformed strands and a center wire. Preferably, high frequency induction heating is used for this heat treatment. In addition, direct current heating or a tunnel furnace may be used.

Effects of the Invention According to the method of the present invention, it is possible to perform planetary type stranding of the so-called "j method with twisting" even with odd-shaped strands, and there is no residue left on each strand after twisting. The stress is
It can advantageously be removed by heat treatment. Therefore, the required performance as a stranded wire, that is, each J! It is possible to satisfy all of the following performance requirements: no U-dispersion J of the wire, no rotation of the entire stranded wire, and no "undulation" of the stranded wire. In addition, since no boss form rollers are used to remove residual stress in the wires after twisting, mechanically weak materials such as optical fiber units can be used as the center wire material without any problems. . Therefore, the wire twisting method of the present invention has a wide range of application.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a partially cutaway fApA diagram showing an optical composite aerial site WA1 obtained by implementing the present invention. The optical composite overhead ground wire 1 shown here includes an optical fiber unit 2 as a central Iil material. The optical fiber unit 2 includes a circular pipe 3 made of aluminum or an alloy thereof, and a plurality of optical fiber cores 4 are passed through the inside thereof. The optical fiber core 4 is accommodated in a groove 6 extending spirally in the circumferential surface of a spacer 5 made of, for example, aluminum. On the outer periphery of such an optical fiber unit 2, six irregularly shaped strands 7 having a substantially fan-shaped cross section are twisted together. The irregularly shaped wire 7 is made of #I wire or aluminum coated steel wire, and has a tensile strength of 60 kg/
The significance of the present invention becomes particularly significant when more than go+' is used. Each irregularly shaped wire 7 constitutes a substantially cylindrical Wi-line layer on the outer peripheral surface of the optical fiber unit 2.

FIG. 2 is a front view showing only one irregularly shaped wire 7 shown in FIG. 1. The heteromorpheme 117 is given a spiral twist. The cross-sectional shapes of each portion of this irregularly shaped strand 7 are collectively shown in FIG.

In FIG. 3, each fan-shaped cross section indicated by A-D corresponds to a cross section cut along line A-D in FIG. 2, respectively. In FIG. 3, as indicated by the arrows, the cross sections at each portion in the length direction of the irregularly shaped wire 7 are A, B, C,
It changes like D, A, etc. In carrying out the method of the present invention, first, a deformed wire 7 having a shape as shown in FIG. 2 is prepared. This will be explained below with reference to FIG.

FIG. 4 is a diagram for explaining the process of imparting twist to the heteromorphic element IIa7. FIG. 4 shows a rigid type of twisting l1lvs which implements the conventionally used so-called "non-twisting" method of twisting. A deformed wire 7 is wound around the bobbin 8 on the supply side in a normal state. The heteromorphic element [17 drawn out from the bobbin 8 is first passed through the batten 9, passed through the preform roller 10, and then passed through the assembly die 1.
1 and is wound onto a bobbin 12 on the winding side. Here, the bobbin 8, batten 9 and preform roller 10 are
They are rotated synchronously about the center line 13. therefore,
By adjusting the length per unit time of the irregularly shaped wire 7 wound on the bobbin 12 on the winding side and the number of rotations per unit time around the center line 13, the irregularly shaped wire 7 wound on the bobbin 12 can be adjusted. The twist pitch of 7 can be arbitrarily selected. In Fig. 4, the bobbin 8 on the supply side is shown as an imaginary line in order to clearly distinguish it from the "with twist" method described later. While the wire 7 is being drawn out, it only revolves around the center 113 and does not rotate at all.

Next, as shown in FIG. 5, a twisted 11 layer is formed on the optical fiber unit 2, which is the centerline, using a plurality of twisted twisted elements 117.

This process is performed using [Planetary type twisting that performs J-type twisting with twisting! Implemented by I. 1, that is, allomorpheme 1 with twist added! Six bobbins 12 are prepared for winding i17, and each bobbin 12 is connected to a bobbin revolution device i! (not shown). In FIG. 5, the two bobbins 12 on the near side are omitted from the illustration, but each bobbin 12 maintains its axial direction substantially constant due to this bobbin revolution device, and the optical fiber 1. Planetary motion is carried out around Nitsu T-2. This is a feature of the [with twisting] method. The irregularly shaped raw powder 7 drawn out from each bobbin 12 is passed through the batten 16 and guided by the preform roller 17.
The pieces are collected in the collection die 18. Note that the preform roller 17 is composed of, for example, a combination of three rollers, and the interval between the first roller and the third roller is selected to be the same as the twisting pitch of the twisted wire to be obtained. .

In synchronization with the 18M movement of each bobbin 12, while the battens 16 and preform rollers 17 are rotated or revolved (arrow 19), the optical fiber unit 2 serving as the center wire
is sent in the direction of arrow 20.

Although not shown, the device for feeding the optical fiber unit 2 includes a capstan and a winding drum arranged in the direction of the arrow 20.

As described above, when the optical fiber unit 2 is fed in the direction of the arrow 20 and each irregularly shaped yarn tlA7 is rotated in the direction of the arrow 19, each irregularly shaped yarn $7 is twisted together at the position of the collecting die 18 to form the desired shape. of strands is achieved.

However, even after the above-described steps are completed, distortion remains in each of the twisted irregularly shaped threads 87. Therefore, in order to remove such distortions, heat treatment must be performed.There are two possible heat treatment methods: one in an in-line process and one in an offline process. The in-line and offline steps are illustrated in FIGS. 6A and 6B, respectively.

In the in-line system shown in FIG. 6A, the heat treatment device [14 is located downstream of the collecting die 18 shown in FIG. 5 and upstream of the capstan and the winding drum (not shown).
provided. Although the heat treatment device 14 is shown highly schematically, it may be a well-known high-frequency Ms heating device, a direct current heating device, or a tunnel furnace.

In terms of heating efficiency, it is most preferable to use high frequency induction heating. N of the optical composite overhead ground wire 1 by heat treatment equipment [14]
The deformed wire 7 constituting the IQ layer is strain-removed while being restrained in a wire twisting machine.

In the geo-offline h formula shown in FIG. 6B, the optical composite aerial area wa1 (each irregularly shaped wire 7
There are still residual stresses present.

) is once wound up on the drum 15, and then heat-treated in a batch-type heat treatment I@14a. During this heat treatment, distortion is removed from each irregularly shaped yarn 1/a7 constituting the twisted layer of the optical composite aerial fabric I11 while being subjected to a restraining force brought about by winding on the drum 15.

The above-mentioned heat treatment is performed to remove the stress remaining in the twisted irregularly shaped wire 7, and any conditions are sufficient as long as the distortion of the material of the irregularly shaped wire 7 can be removed at least.

However, if the heat treatment conditions are too severe, a strong annealing effect will occur in the material of the irregularly shaped wire 7, resulting in a significant decrease in strength. As a preferable condition, in the case of the irregularly shaped yarn 41117 made of the material as described above, the
A temperature condition of 0°C is chosen. That is, here, 200
If the temperature is less than 0.degree. C., the distortion of the irregularly shaped filament 17 cannot be removed, whereas if it exceeds 500.degree. C., the strength of the irregularly shaped strand 7 will be reduced.

Note that from the point of view of stranded wire manufacturing efficiency, the in-line process shown in FIG. 6A is more preferable than the off-line process shown in FIG. 6B [J].

In addition, fMII] lX as shown in Fig. 5 is maintained for a long time (
In other words, if it is carried out over a long distance), the error between the twist pitch of the irregularly shaped wire 7 and the twist bit of m111 will be accumulated, and the inclination on the cross section of each irregularly shaped wire located at the twisting end will be The posture may deviate from the desired position. Therefore, it is preferable to take measures to prevent this. This treatment is achieved by providing means for restraining the tilted posture of the deformed wire 7 on the cross section at at least one location between the bobbin 12 and the collecting die 18. Some examples will be explained below.

FIG. 7 shows a first example of means for restraining the tilted posture of the irregularly shaped wire. In FIG. 7, a pair of rows 521, 22 are rotatably attached to the batten 16 via brackets [23]. As is clear from FIG. 8, which shows an enlarged cross section along the line ■-■ in FIG. A pair of grooves 24, 25 are formed. Therefore, when the irregularly shaped wire 7 passes through these rollers 21.2211, its posture on the cross section is naturally restricted. If the shape of the twisted irregularly shaped wire 7 is modeled by a sine curve, the peak of this sine curve must be located at the twisting opening 26.

In the illustrated example, the rollers 21, 22 are also set to be at the peak of this sinusoidal curve.

Therefore, the positions of the rollers 21, 22 should be set so that the distance from these rollers 21, 22 to the twisting port 26 is an integral multiple of the period of the sine curve. , one irregularly shaped strand 7 (not shown), but ifPJ is formed equivalently for other irregularly shaped wires.

FIG. 9 1 shows a second example of the troublesome posture restraining means of the irregularly shaped cable wire. The configuration shown here is located, for example, where the pref A-mulola 17 of FIG. 6 is located. This example C includes three pairs of rollers 28 to 33, and the multiple pairs of rollers are rotatably held by brackets h34 to 36. The brackets 3, 1-36 are fixed to turntables 37-39, respectively. Turntable 37...
39 is rotatably mounted around an axis 43 while being held by holding bases 40-42.

Holding stands 40-42 are fixed to vibrator 47 via arms 44-46, respectively. The pipe 47 rotates together with the batten 16, for example, and allows the optical fiber unit 2 to pass therethrough.

As mentioned above, the turntables 37 to 39 are arranged along the axis 4.
It is rotatably mounted around 3.

Therefore, the multiple pairs of rollers 28 to 33 can change direction in the direction of arrow 48. And screws 49-51
By tightening the rollers 28 to 33, the inclination of each roller 28 to 33 is fixed.

Note that although the shapes of the rollers 28 to 33 are not particularly shown, they have grooves similar to those of the rollers 21 and 22 described above.

In FIG. 9, when the form of the heteromorphic element 17 is considered to be a sine curve, multiple pairs of rollers 28 to 33 are shown positioned at positions corresponding to the winter peaks of this sine curve. However, in this example, even if the roller does not necessarily come to the peak position, the tilted posture of the irregularly shaped wire 7 on the cross section can be restrained.

FIG. 10 shows a case where irregularly shaped strands 7a with different heel pitches are used, and in this case, as described above, the locations where the multiple pairs of rollers 28 to 33 are located are on the sinusoidal curve. Sometimes it deviates from the mountain. Each O-ra 28 to 3 shown in FIG.
The positions 3 are all offset from the peaks of the irregularly shaped strands 7a. In this case, loosen each of the screws 49 to 51 mentioned above, rotate each roller 28 to 33 around the shaft 643, set the desired inclination, and then tighten the screws 49 to 51 again to fix the inclination. do it. Such a configuration is advantageous when it is necessary to produce stranded wires with different twisting pitches using one stranding machine.

Note that if such advantages are not desired, each roller 28
- 33 may be installed with their inclinations fixed. Further, the configuration in which the inclination of the rollers can be adjusted in this manner can also be applied to the rollers 21 and 22 shown in FIG. 7 described above.

The 11th factor shows a third example of means for constraining the tilted posture of the heteromorphic element s7 on the cross section. In this example as well, the blue line is removed as in the second example. First, as in the second example, three pairs of rollers 52 to 57 are placed on the bracket 5.
It is rotatably held by 8 to 60. The mounting bases 61 and -63 extend integrally from each bracket 58 to 60.
is formed. On the other hand, the mounting plate 64, which is provided to rotate together with the opening plate 16, for example,
5 is h'1. It extends radially to form -C. The mounting plate 05 is provided with a long hole 66 extending parallel to the direction of the irregularly shaped wire 7. Each [''-ra 52・-57f take [1 (anti-65
A plurality of bolts 67 are prepared for mounting on the mounting base G1.-63, b? , l extending through the elongated hole 66 and screwed into a nut (f in the figure) on the back side of the mounting plate 65.

In the example shown in FIG. 11, although the inclinations of the rollers 52 to 57 are fixed, the position in the length direction of the heteromorphic element wA7 can be adjusted by v4. That is, each mounting base 61-63 can be moved along the elongated hole 6G by tightening the bolt 67, and can be fixed at that position by tightening the bolt 67 again. Therefore, it is possible to adjust each []-]ra 52-5 to be located at, for example, a peak position of the irregularly shaped strand 7.

In addition, as in the case of FIG. 7, in FIGS. 9 and 11, only one odd-shaped strand is shown with W4 connected, but the same configuration can be applied to other odd-shaped strands as well. has been added. However, in the example of FIG. 9, the arms 44 to 46 are
Each of them extends six times in the radial direction of the pipe 47, and in the example shown in FIG. 11, the mounting plate 65 extends six distances in the radial direction around the vibro 4.

The means for restraining the tilted posture on the cross section of the irregularly shaped yarn 417, respectively explained with reference to FIGS. 7 to 11, may be combined with each other for one twist m* and subjected to acid treatment. .

Figure 12 shows, for example, the O-ra 21.22 shown in Figure 17.
A modified example is shown. As shown in this figure, roller 2
The cross-sectional shapes of the grooves 24 and 25 formed in the grooves 1 and 22 can be changed as appropriate.

Here, the irregularly shaped thread [17] having a fan-shaped cross-sectional shape is restrained in a vertical posture. In short, the grooves formed on the rollers 21, 22 only need to be combined to form a cross section corresponding to the cross section of the irregularly shaped yarn s7.

Note that in the modification shown in FIG. 12, the rollers 52 to 57 in FIG. 11 are similarly applied to the rollers 28 to 33 in FIG.
It can also be applied to

The means for restraining the tilted posture on the cross section of the irregularly shaped yarn 117 does not need to be a pair of rollers. For example, a die 68 as shown in FIGS. 13 and 14 may be used. In FIG. 13, the die 68 is shown in a front view;
FIG. 14 shows a sectional view taken along line IV--IV in FIG. 13. A hole 69 corresponding to one side of the irregularly shaped thread 17 is formed in the die 68 . Dice 68 like this
are rollers 21 and 22 in Fig. 7, and rollers 2B to 2B in Fig. 9.
33 and the rollers 52 to 57 in FIG.

FIG. 15 shows a preferred configuration for implementing the method of the present invention. In FIG. 6, the bobbin 12 is shown with its axis always kept in the same direction during its planetary motion, but more preferably, as shown in FIG. As shown in , the structure is such that the inclination can be changed during planetary motion. 1st
In FIG. 5, the a-ra 21 and 22 which are not shown in FIG. 7 mentioned above are shown. For example, if the tilted posture of the irregularly shaped yarn 1117 on the cross section is restrained by such rollers 21 and 22, the irregularly shaped yarn 17 existing between the bobbin 12 and the rollers 21° 22 will be forced to twist. It may occur. In the configuration shown in FIG. 15, consideration has been given to eliminating this unreasonableness as much as possible. That is, a pair of rollers 71.22 are provided between the bobbin 12 and the O-rollers 21.
72 is placed and held so as to be tiltable in the direction of arrow 73.

The rollers 71, 72, like the rollers 21, 22, are provided with grooves 24, 25 as shown in FIG. Therefore, the arrow 7 of the roller 71.72
The rotation angles in three directions are also restricted. This rotation angle is detected by a rotation angle detection device 74, and its output is given to a rotation 11 control device 75. Rotation control I device 175
The bobbin 12 rotates according to the rotation of O-rough 1°72.
is controlled so as to have a desired inclination (1). In other words, according to the configuration shown in FIG.
Since the inclination of the bobbin 12 is controlled so that the angles are opposite to each other at 1°22, there is no helical force in the deformed # wire 7 that runs between the bobbin 12 and the rollers 21 and 22. It doesn't matter if the direction is impossible.

As mentioned above, when connecting optical composite overhead ground wire to v9 - (
Based on the illustrated I2 embodiment (also described in detail):
In other transmission lines and even in lobe-J'
The present invention is equally applicable to C.

In addition, although the illustrated embodiment or the cross-sectional shape of the irregularly shaped hexagonal wire is fan-shaped, it is not necessarily limited to this. All in all, it can be seen that the present invention can be used advantageously.

[Brief explanation of drawings]

With this invention, Mue 1 figure is l? An example of a stranded wire that can be used as an optical composite fictitious 1t! 1 is a partially cutaway perspective view showing line 1. FIG. FIG. 2 is a front view showing only one irregularly shaped wire 7 shown in FIG. FIG. 3 also shows the h-plane of each part of the length-shaped heel 7 shown in FIG. 2. FIG. 4 is a diagram illustrating the process of applying a spiral twist to the irregularly shaped wire 7. FIG. 5 schematically shows the process of twisting the twisted irregularly shaped wires 7.
Figure Δ and Figure 6B schematically show the process of heat-treating the twisted irregularly shaped strands to remove distortion. Figure 7 shows
A first example of the tilt posture restraining means for the irregularly shaped wire 7 is shown. 8th
The figure is an enlarged sectional view taken along the line ■-■ of the WS7 diagram. FIG. 9 shows a second example of the tilting posture restraining means for the irregularly shaped wire 7. As shown in FIG. FIG. 10 shows one aspect of the adjustment state of each roller 28-33 in FIG. 1. FIG. 11 shows an example of WS3 of the tilt posture restraining means for the heteromorphic element a7. Figure 1112 shows a variant of the roller 21.22. FIG. 13 shows a die 6 as another example of the tilt posture restraining means.
8. FIG. Figure 14 is an import IV of Figure 13.
It is a sectional view along -IV. Figure 15 shows the bobbin 12
1 schematically shows an i-configuration for controlling the inclination of . In the figure, 1 is an optical composite overhead ground wire, 2 is an optical fiber unit as a center wire material, 7 and 7a are irregularly shaped wires, 12 is a bobbin, 14 and 14a are heat treatment devices, 45 is a drum, and le
&-thread, 1 board, 1ξ] 111 dice. Patent Applicant Sumitomo Electric Eda Co., Ltd. Shin 1 Center 2 Figure 3 Figure 5 Figure f76B Figure Error Procedure Amendment November 8, 1980 To the Commissioner of the Special Agency 1, Indication of Case 1988 Patent Application No. 10593 2, Name of the invention Method for twisting irregularly shaped cable wires 3, Relationship with the case of the person making the amendment Patent applicant address Osaka City Location Kitahama 5-15 Name (2
13) Sumitomo Electric Industries Co., Ltd. Representative Tetsube Kawakami 4, Agent address: 112-3-9 Tenjin, Kita-ku, Osaka Yachiyo Daiichi Building Telephone Osaka <06) 351-6239 (Main) Voluntary amendment 6, Amendment -7 of the detailed description of the invention for which the subject matter is clearly mis-written Corrected to ``. that's all

Claims (13)

[Claims] (1) A method of twisting a plurality of irregularly shaped strands around a central wire, wherein each of the irregularly shaped strands is given a spiral twist. The plurality of twisted wires are placed at the center l.
A method for twisting irregularly shaped wires, comprising the steps of: twisting the wires around 1lI71 in a planetary type, and heat-treating the twisted irregularly shaped wires to remove distortion. (2) The method for twisting irregularly shaped wires according to claim 1, wherein the step of imparting a screw-like twist to each irregularly shaped wire is carried out by a rigid WA machine. (3) The irregularly shaped wire is t141i! Or aluminum coated #II! And it is tensile strength! It 60 kg
/ am' or more, the method for twisting irregularly shaped strands according to claim 1 or 2. (4) The method for twisting irregularly shaped strands according to claim 3, wherein the heat treatment is performed at a temperature of 200 to 500°C. (5) The twisting process is performed at the same twisting pitch as the twisting pitch of each of the irregularly shaped east wires.
5. The NWA method for irregularly shaped strands according to any one of items 1 to 4. (6) The wire twisting process is performed using planetary type I! ! A method for twisting irregularly shaped strands according to any one of claims 1 to 5, which is carried out by a wire machine. (7) the center wire is an optical fiber unit;
A wA111 method for producing irregularly shaped strands according to any one of claims 1 to 6. (8) The method for twisting irregularly shaped wires according to any one of claims 1 to 7, wherein the cross-sectional shape of the irregularly shaped wires is substantially fan-shaped. (9) The heat treatment is performed in an in-line process before winding Ma made up of a plurality of twisted irregularly shaped strands and a center wire, according to any one of claims 1 to 8. M1 method for irregularly shaped strands as described in . (10) The heat treatment is performed on a plurality of twisted twisted wires*
A method for twisting irregularly shaped strands according to any one of claims 81F11 to 8 (as described in Claim 81F11), which is carried out in an A-line process after winding a stranded wire consisting of a center wire and a center wire. (11) The irregularly shaped wire according to claim 9 or 10, wherein high frequency induction heating is used for the heat treatment! ! ! line method. (12) The method for twisting irregularly shaped strands according to claim 9 or 10, wherein the heat treatment includes direct current heating h (used). (13) A tunnel furnace is used for the heat treatment,
A method for twisting irregularly shaped strands according to claim 9 or 10.