JPH0426164B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an improvement in a method for twisting a filament and a twisting device, and in particular, an improvement in which the internal components of the twisted wire can be conveniently exchanged and twisted. The present invention relates to a twisted wire method and an apparatus therefor.

[Prior Art] When looking at the structure of a twisted wire, it is very rare that the twisted wire is made up of only one layer, and it is generally made of a multilayer structure of two or more layers. In such multilayer stranded wires, twisting is performed in order starting from the center, and finally the outermost layer is twisted to complete the stranding. Furthermore, it was rare to change the internal configuration of the twisted wires after such twisting was completed, and when such a need arose, the actual situation was that the twisted wires were re-twisted from the beginning. .

[Problems to be solved by the invention] When it is desired to change the internal structure of the stranded wires, it is extremely uneconomical to re-twist the wires from the beginning as in the conventional example, and there is also a large loss of time. .

On the other hand, there is a phenomenon in stranded wires in which, after being twisted, each strand is untwisted either elastically or by mechanical external force during overhead contact, and this untwisting may pose a serious problem. For example, the one shown in FIG. 3 is an optical fiber overhead ground wire (hereinafter referred to as "optical ground wire") in which fan-shaped wires 21 are twisted around the outer periphery of an OP unit 31 that houses an optical fiber 31a in an aluminum pipe.
This figure shows a cross-sectional view of an example of the external wire 21 of such OPGW (referred to as OPGW).
When the untwisting occurs, the twist pitch of the stranded wire increases and the outer stranded wire layer substantially extends in the longitudinal direction of the wire. If the outer twisted wire layer stretches like this, it is twisted together with this layer.
OP unit 31 will also be extended,
As a result, the optical fiber 31a, which has a small amount of elastic elongation and a weak mechanical strength, is also stretched, and there is a risk that the optical fiber 31a may break.

In order to minimize the occurrence of the above-mentioned untwisting in the stranded wires, a preform is given to each strand during the stranding, and the twisting force of each strand is made strong so that the above-mentioned elastic deformation does not occur in each strand. It is necessary to give a mechanical shape retention force as well as a plastic deformation as shown in Fig. 3.
In the case of OPGW, the internal component is an OP unit with low mechanical strength, and if the above-mentioned excessive preforming or twisting force is increased, there is a risk that the OP unit 31 itself will be damaged. However, there was a limit to the stress that could be applied.

[Means for Solving the Problems] The present invention has been made in view of the above-mentioned circumstances, and even in the case where an internal component such as an OP unit with low mechanical strength is included, the external stranded wire is The object of the present invention is to provide a wire twisting method capable of imparting a strong twisting force to the layer and minimizing the untwisting of the twisted wires, as well as a device therefor. After the twisted body having the outer component and the outer component are once twisted together, the outer component is untwisted and expanded, and the inner component is removed, while another inner component is separately placed inside the expanded outer component. A wire twisting method for inserting an element and retwisting the untwisted outer component around the outer periphery of another inner component, and provided as an apparatus for efficiently accomplishing such a wire twisting method. A first delivery device for delivering a ready-made stranded wire is disposed in front of an expanding device capable of temporarily holding the outer component of the stranded wire in an expanded state, and the first delivery device for delivering the ready-made stranded wire is disposed behind the expanding device. A collection die for retwisting the elements, a take-off device for taking off the re-twisted strands, and a first winding device for winding the taken-off strands are arranged, while the outer component is taken out after being expanded. a second winding device for winding up the removed inner component; and a second delivery device for feeding another inner component to the inside of the expanded outer component in place of the removed inner component. the expanding device is arranged in a non-rotating state, and the first sending device, the take-up device, the first winding device, the second sending device, and the second winding device are configured to be rotatable. It's in the device.

In addition, in the following examples, the OPGW
Although the application of the present invention is mainly explained to stranded wires, the application of the present invention is not limited to OPGW only, but can be applied to all situations where it is desired to appropriately transform the internal components of a stranded wire. Of course.

[Example] The present invention will be explained in detail below with reference to the drawings.

FIG. 1 is an explanatory diagram showing a situation in which OPGW is twisted by applying the present invention. First sending device 1
As separately shown in the sectional view of FIG. 2, a false twisted wire 20 in which external strands 21 are temporarily twisted is wound around the outer periphery of a false core wire 22 having high mechanical strength such as a steel wire. It is rolled out. Since the inner core wire of this false twisted wire 20 is a steel wire, when twisting the outer wire 21, unlike when the inner wire is the OP unit 31, it is possible to give the wire 21 a strong preform. Of course, it is possible to apply a strong twisting force during the twisting work, to create a strong twisting habit in each strand, and to twist the wires in a state where the occurrence of untwisting is minimized. I can do it. False twisted wire 2 twisted in this way
0 is sent out from the first sending device 1 as shown in the figure,
Expanding eye plate 4 that passes through the shaft center 3 of the first rotation cage 2 and is attached to the end of the shaft center 3
The external wires 21, 21 are expanded. This expansion plate 4 is constructed as shown in FIG. 5, for example, and has a hole 4b in the center and radially formed protrusions 4a, 4a between the protrusions. The respective strands 21, 21 are untwisted and housed separately in the troughs to be in an expanded state. This untwisting and spreading is carried out on the false twisted wire 20 as shown in FIG.
is in a non-rotating state, and the first rotating cage 2 is set at its axis 3.
If the expansion plate 4 fixed to the shaft center 3 is rotated in the direction of the arrow in FIG. It is loosened and expanded by a perforated board.
Once expanded, the wires 21, 21 are gathered again in the gathering die 6, and the gathering die 6 is rotated together with the second rotating cage in the direction of the arrow in FIG. 1, so that the wires 21, 21 are twisted again. It is configured to be integrated.

In the present invention, when the strands 21, 21 are expanded at the expansion plate 4 portion, the false core wire 22, which is an internal component of the false twisted wire, is removed laterally as shown in FIG. On the other hand, as shown in FIG. 5, the second delivery device 5 is
The OP unit 31 that has been wound around the strands is supplied as a new core wire to the strands 21, 21 to be retwisted, so that they are finally twisted into an OPGW as shown in FIG. That is, by going through the above steps, the inner component of the twisted wire is replaced from the temporary core wire 20 to the OP unit 30. As described above, the false twisted wires 20 are twisted so that each wire has a sufficient preform and a strong twisting force is applied during twisting. , 21 will be re-twisted with a sufficient twisting tendency, and the wire will be completely twisted, so it will be different from the conventional method.
Much stronger twisting is achieved than in the case of OPGW, where the twisting is insufficient due to damage to the OP unit. As a result, the untwisting of the OPGW can be minimized, and it is possible to completely prevent optical fiber breakage accidents due to stretching of the entire stranded wire, thereby making it possible to significantly ensure reliability. In FIG. 1, 8 is the axis of the second rotation cage 7, 9 is a guide pulley for the removed temporary core wire 22, 10 is a second winding device for winding the removed temporary core wire, and 11 is a rewinding device. A capstan takes over the stranded OPGW,
12 is a first winding device that winds up the OPGW.

The device shown in Figure 1 shows the principle and tends to have a slightly complicated configuration.In order to actually twist wires efficiently, it is necessary to use the device shown in Figure 4. It is better to use equipment. In Fig. 4, the same reference numerals are given to the components that have substantially the same operation as in Fig. 1 to facilitate comparative consideration, but there are considerable differences in the substantive operation. be. First, in the case of FIG. 1, the expansion aperture plate 4 is rotated, but in the case of FIG. 4, it is in a non-rotating state, which is a major feature. In contrast to the expansion plate 4 being set in a non-rotating state, in FIG. Both the take-off device 10 and the take-off device 11' are in a rotating state, and each is configured to rotate synchronously. The false twisted wire 20 wound on the first sending device 1 is sent out as shown in FIG.
21 is untwisted and expanded, and the strands 21,
21 is assembled again by the assembly die 6,
It is taken up by a caterpillar (substantially the same as the capstan shown in FIG. 1) 11' and finally wound up by a first winding device 12. During the above process, the temporary core wire 22 is removed laterally when the strands 21, 21 are expanded at the expansion plate 4 as shown in the figure, and the OP unit 31 is removed as shown in the figure when the wires are retwisted. Regarding the supply, there is no difference from the case in FIG. 1. The difference is that, as mentioned above, everything except the expansion eye plate 4 is rotated synchronously. However, it will be easily understood that configuring the stranded wire device in this way simplifies the configuration and smoothes the operation much more than the case shown in FIG. The applicant also uses the wire twisting device shown in FIG.
We succeeded in manufacturing OPGW industrially.

As already noted, the application of the wire twisting method and wire twisting device according to the present invention is applicable to the above-mentioned OPGW.
It is not limited to stranded wires, but can be applied universally to stranded wires that have an inner component and an outer component, especially for the purpose of strengthening the stranding of the outer strand layer. It goes without saying that the present invention is also applicable to cases in which it is desired to simply replace internal components, and such cases are within the scope of the technical idea of the present invention.

Furthermore, although the already explained stranding device is installed inside the factory, if the stranding device itself is modified so that it can run on the overhead wires, it is possible to improve the inner structure of the existing wires. It is also possible to replace elements while the overhead line remains in place.

[Effects of the Invention] As described above in detail, according to the wire twisting method and wire twisting device according to the present invention, it is possible to freely exchange the inner components of the twisted wires once they are twisted together. Therefore, the internal components of the stranded wire can be replaced at any time as needed, and a stranded wire that can be adapted to the intended purpose can be obtained simply and easily, and its industrial significance is enormous.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of the principle of an apparatus for carrying out the twisted wire method according to the present invention, FIG. 2 is a cross-sectional view of a false twisted wire,
FIG. 3 is a sectional view showing an example of an OPGW, FIG. 4 is an explanatory view showing another example of the stranding device according to the present invention, and FIG. 5 is an explanatory view showing an example of an expansion perforation plate. 1; first delivery device; 4; expansion device (expansion eye plate);
5; Second sending device, 6; Collecting dice, 10; Second
Take-up device, 11, 11'; Take-up device, 12; First
Winding device, 20; false twisted wire, 21; outer component (external strand), 22; first inner component (false core wire),
30; OPGW, 31; second inner component (OP unit).

Claims (1)

[Scope of Claims] 1. Untwisting the outer component of a twisted body having an inner component and an outer component to form an expanded portion, and removing the inner component from the expanded portion, while removing the expanded portion. Another inner component to replace the removed inner component is newly supplied inside the removed outer component, and the untwisted and expanded outer component is twisted again around the outer periphery of the other inner component. How to strand the wire. 2. Claim 1, wherein the outer component is an outer twisted wire layer formed by twisting metal wires together, and another newly supplied inner component is an OP unit.
Twisting method described in section. 3. The wire stranding method according to claim 2, wherein the metal wire is a fan-shaped wire. 4. Claim No. 4 in which the outer components are untwisted and retwisted by holding the twisted body in a non-rotating state and rotating the expanding means for expanding the outer components. The method for twisting wire according to any one of items 1 to 3. 5 Claims that allow the outer components to be untwisted and retwisted by rotating the twisting body and holding the expanding means for expanding the outer components in a non-rotating state. The wire twisting method according to any one of items 1 to 3. 6. A first device for delivering the ready-made strands in front of a spreading device capable of holding the outer components of the strands once expanded.
A feeding device is arranged, and behind the expanding device there is a gathering die for retwisting the expanded outer components, a take-off device for taking over the re-twisted strands, and a winding up of the taken-out strands. a first winding device is arranged, while a second winding device for winding up the inner component taken out after the expansion of the outer component and a second winding device for winding up the inner component taken out after the expansion of the outer component; disposing a second delivery device for delivering another inner component to the inside of the outer component;
A twisted wire device, wherein the expanding device is held in a non-rotating state, and the first sending device, take-up device, first winding device, second sending device, and second winding device are configured to be rotatable.