JPS58122140A - Manufacture of twisted wire - Google Patents

Abstract

PURPOSE:To save energy for a work, and to elevate the rate of operation of a wire twisting machine, by installing a bobbin to which plural steel strands have been bundle-wound, in a flyer, drawing out and twisting these strands, and after that, winding them in the outside of the wire twisting machine. CONSTITUTION:A strand supplying bobbin 1 to which plural steel strands for constituting the same layer of a twisted wire structure have been boundle-wound is installed in a state that it has been held by a cradle 28, in a flyer 20 of a wire twisting machine 2. Subsequently, a parallel strand bundle 3 drawn out from the bobbin 1 is wound round a twist back flow preventing roller 6 by 1 piece each and more than once, respectively, through guide rollers 4, 5, and after that, is led into an end plate 7. The end plate 7 has a small hole placed so as to be similar to the twisted wire structure. Each strand is bundled, keeping a similar figure with the twisted wire strcuture by feeding it to a voice 8 through each small hole of this end plate 7, and at this stage, it is twisted by rotation of the flyer 20. Subsequently, this strand bundle is drawn out to the outside of the wire twisting machine 2 through guide rollers 9, 10, and is wound round to a winding bobbin 15 after prescribed twist has been given.

Description

[Detailed description of the invention] The present invention relates to a method for manufacturing stranded wire.

Conventionally, the method of manufacturing stranded wire from steel cable using a wire twisting machine (twice twisting machine) is to supply the strands from outside the wire twisting machine, twist them, and then strand them inside the fryer. There is an external supply method in which the strands are wound up, and an internal supply method in which the strands are supplied from inside the stranded fryer, twisted, and then wound outside. Of these, in the external supply method,
In addition to the winding bobbin inside the fryer, there is a capstan,
゛The capacity of the stranded wire winding bobbin is limited to the inner space of the fryer because the stranded wire tensioning device and the device to guarantee the quality of the stranded wire, such as a speed reducer, over twister 1 correction roller, traverser, etc., are installed. significantly smaller compared to In this case, if an attempt is made to increase the bobbin capacity by enlarging the flyer, the number of rotations of the seven liers will decrease, making it difficult to perform high efficiency wire twisting work. Therefore, as long as the flyer is made to a size that does not cause such a decrease in work efficiency, the winding bobbin capacity will be very small, which will increase the frequency of bobbin replacement, and this replacement will require a lot of manpower. This has the disadvantage that it also leads to a decrease in the operating rate of the wire twisting machine. On the other hand, according to the internal supply method, the above-mentioned equipment for tensioning and quality assurance is placed outside the 7-tier fryer, so it is possible to prevent these equipment from limiting the internal space of the fryer. However, with this conventional method,
7. Since the number of wire supply bobbins corresponding to the number of wires according to the strand configuration was built into the 7-layer, the size of each bobbin was limited. As the individual bobbin capacity becomes smaller,
There was a drawback that the frequency of replacing the wire supply bobbin increased.

In view of these circumstances, the present invention reduces the frequency of replacing the bobbin for supplying strands without reducing the efficiency of the wire stranding operation in an internal supply type stranded wire manufacturing method, thereby saving labor and improving the stranding machine. The purpose of the present invention is to provide a method for manufacturing stranded wires that makes it possible to improve the operating rate of the stranded wire.

That is, in the present invention, after a plurality of steel cables constituting the same layer in a stranded wire structure are bundled and wound on the same bobbin, the bobbin is installed in the 7-layer of a twisting machine, and then these steel cables are pulled out and twisted. This method is characterized in that the wire is wound outside the twisting machine after being wired.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a first embodiment of the present invention, in which 1
After bundling and winding a plurality of steel cable wires (hereinafter referred to as "strand wires") using the strand wire supply bobbin, the 7-layer 2 of the twice-twisting machine 2
0 while being held in a cradle 28, which will be described later. 20a is a rotating shaft of the fryer. Reference numeral 3 denotes a bundle of parallel wires pulled out from the bobbin 1, and the bundle of parallel wires 3 passes through guide rollers 4 and 5, and is wound one or more times around a twisted backflow prevention roller 6. It is introduced into the mirror plate 7. The mirror plate 7 has a small hole arranged similarly to the stranded wire structure. Each element wire is sent to the voice 8 through each small hole in the end plate 7, and is bundled while maintaining a similar shape to the stranded wire structure.
Torsion is given by the rotation of . At the exit of the voice 8, the strand bundle is twisted by a predetermined half, and then this strand bundle is pulled out of the twisting machine 2 through guide rollers 9 and 10 installed at both ends of the 7 strands 20. , a predetermined twist is given. Furthermore, over twister-11
The strands 16 are then shaped and corrected by the straightening roller 12 to finish a predetermined stranded wire 16.
3 and a traverser 14, and then wound onto a winding bobbin 15.

In this method, a plurality of wires are bundled and wound around the wire supply bobbin 1 in advance so that the difference in length between them is reduced. Although the method of bundling is not limited in the present invention, for example, the method shown in FIGS. 2(a) and 2(b) may be used. That is, the wire group 60 drawn out from the final die 21 of the wire drawing machine is pulled out and passed through the capstan 22.
After applying a certain tension to the wire group 30 to reduce the length difference between the wires, these wires are passed through the turn roller 23 and the traverser 24 to the wire supply drum 1. On the outer periphery of the capstan 22, there is a touch roller 2 whose surface is coated with rubber.
5 is arranged so that it can freely rotate, and the touch roller 25
By pressing against the capstan 22 with a spring or the like,
To prevent the wire from slipping on the capstan 22. By doing this, each strand is fed out in an amount corresponding to the length of the capstan 22, and the difference in length between the strands is reduced, and the difference in length between the strands wound on the bobbin 1 is reduced to 0. 2
It can be within %. However, if the length difference between the strands is allowed to be up to 0.6%, the touch roller 25 is not necessarily required, and the number of times the strands are wound around the capstan 22 may be reduced.

FIG. 6 shows a second embodiment of the invention, in which:
In a state in which a plurality of wires are wound around the wire supply bobbin 1 so that one twist is applied each time the wire is wound, the bobbin 1 is connected to the 7-layer 20 of the wire twisting machine 2. placed within. When the strand bundle is drawn out from the bobbin 1, it is untwisted and guided out via the strand bundle drawing rotary arm 17 that rotates around the axis of the bobbin 1, thereby preventing twisted backflow. Before being wound around the roller 6, the bundle of strands 6 becomes parallel. The subsequent method is exactly the same as in the first embodiment.

By twisting the wire bundle beforehand and winding it around the bobbin 1 in this way, it is easy to reduce the difference in length between the wires. In this case, winding around the bobbin 1 is carried out as shown in FIG. 4, for example, as shown in FIG. , here it is sufficient to add twist to the strand bundle 0 The above first and second embodiments are suitable for obtaining a stranded wire structure in which all the strands are arranged in the same layer. Applicable.

FIG. 5 shows a third embodiment of the present invention, which is applied when obtaining a twisted wire structure including a core wire or core strand. In this embodiment, a bobbin 1 in which a plurality of wires constituting the side wires are bundled and wound in the same manner as the bobbin of the first embodiment, and a bobbin 18 for core wires or core strands are connected to the 7-layer wire twisting machine 2. It will be installed within 20.

Then, the parallel wire bundle and the core wire or core strand constituting the side wire are drawn out from each bobbin 1, 18, and both the parallel wire bundle and the core wire β' are moved to the guide roller 4.
．． 5 and a twisted backflow prevention roller 6, the wires are arranged similar to the stranded wire structure on the end plate 7, and the stranded wire is manufactured in the same manner as in the first embodiment. In this way, the wire groups constituting the side wire and the core wire or core strand can be connected to each bobbin 1, 18.
The required length is pulled out from each side wire, and the difference in length between the side wire and the core wire or core strand is adjusted.

In this way, when manufacturing a stranded wire with a structure in which strands are arranged in multiple layers, inside and outside, it is sufficient to equip each layer with a drum for supplying strands. Since the groups are bundled and wound around the same bobbin, the number of bobbins is significantly reduced compared to the case where a bobbin is provided for each strand. In addition, if the number of strands arranged in the same layer is large, a plurality of bobbins may be provided in which a plurality of strands are bundled and wound.

In carrying out the method of the present invention as described above, an applicable stranded wire structure is determined by variations in the length of each strand when a plurality of strands are bundled and wound around a strand supply bobbin.

In other words, when the twist pitch is 5 to 10 times the twisted wire diameter, the length difference between the wires is kept within 0.2%, and the four wires shown in Figure 6 (Company) are Twisted structure of wire 31, five strands 31 shown in Figure (b)
A hollow unstable structure such as the twisted □ structure can be obtained. If the length difference in these unstable structures is 0.2% or more, the non-uniformity of the back tensile strength between each strand on the strand supply side will increase, making twist disorder likely to occur. In addition, if the difference in length between each strand is within 0.6%, the twisted structure of two strands 31 shown in FIG. ! It is possible to obtain a 31-strand twisted structure, or a 7-stranded structure consisting of a core wire 32 and a side wire 31 shown in FIG. The twisted structure shown in FIG. 8 is obtained by the method of the third embodiment. Further, using the method of the third embodiment, the six core strands 33 are twisted in advance and connected to the bobbin 18, and the nine strands 31 constituting the side wire are connected to the bobbin 18.
It is also possible to form stranded wires with the stable structure shown in Figure 9 by supplying the wires to , some of the strands on the strand supply side are significantly slackened, making it easy for the strands to become entangled and breakage.

A strand length difference of up to 0.6% is introduced into the stranded wire manufactured in this way, but if further lobes are formed from this stranded wire, the strands may be affected by shading during roving, etc. The length difference is eliminated and no quality problems occur. However, when the stranded wire is used as it is and the strand length 1 is close to 0.6%, when the stranded wire is cut, the strands may come out, causing a quality problem. In such a case, the length difference can be resolved by applying a stretch greater than the yield load to the stranded wire.

An example of a method for introducing this stretch is shown in FIG. 10. This method uses capstans 19 in two stages, front and rear, along the stranded wire movement path.
．． i9 is arranged so that the peripheral speed of the rear stage capstan 1911 is faster than the peripheral speed of the first stage capstan 19, and an arbitrary stretch load can be applied by the difference in peripheral speed. This stretch introduction means may be attached to the capstan 13 in the process shown in FIG. 1, or may be newly installed between the guide roller 10 and the over twister 11. It may be carried out in a separate process after winding onto a bobbin.

FIGS. 11 and 12 show the difference in bobbin arrangement between the method of the present invention and the conventional inner supply method. In these figures, 28 and 28'
are bobbin holding cradles installed stationary inside the 7-layer wire twisting machine, and these cradles 2
8 and 28' are both designed for a four-stranded wire structure. In the case of the method of the present invention, as shown in FIG. 11, one bobbin in which four wires are wound in a bundle is installed in the cradle within two days. On the other hand, in the conventional inner supply method, as shown in FIG. 12, four bobbins 100 each individually wound with each strand are installed in a cradle 28'. According to each of these structures, when the sizes of the cradle 28 and the cradle 28' are made the same, the winding amount of the strands of the bobbin 1 in the method of the present invention is equal to that of the four bobbins 100 used in the conventional method. It was confirmed that the total amount of wire winding can be increased by about 4.5 times.

As explained above, in the present invention, a plurality of steel cable wires constituting the same layer of a stranded wire structure are bundled and wound around the same bobbin and installed in a fryer, and the wire bundle is pulled out from this bobbin, twisted, and then twisted. Since winding is done outside the wire machine, each steel cable wire is wound on a separate bobbin as in the past.
The number of bobbins for supplying strands can be reduced compared to those arranged in the ryer, and the bobbin winding capacity can be significantly increased accordingly. Therefore, the frequency of replacing the bobbin for supplying strands is significantly reduced, making it possible to greatly save labor and making it possible to manufacture stranded wire with a large number of strands, which was difficult to do with the conventional supply method. It has many effects, such as:

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing a first embodiment of the present invention, and FIG. 2 (a
) and (b) are schematic diagrams showing an example of a method of bundling and winding strands onto a strand supply bobbin, FIG. 3 is a schematic diagram showing a second embodiment of the present invention, and FIG. A schematic diagram showing an example of the board winding method, FIG. 5 is a schematic diagram showing a third embodiment of the present invention, and FIGS. 6 to 9 are several examples of structures of stranded wires manufactured by the method of the present invention. FIG. 10 is a schematic diagram showing the stretch introduction means, FIG. 11 is a plan view showing an example of the arrangement of the wire supply bobbin in the method of the present invention,
FIG. 12 is a plan view showing an example of the arrangement of bobbins for supplying strands according to the conventional method. 1... Bobbin for supplying strands of wire, 2... Wire twisting machine, 3...
Parallel wire bundle, 15... Winding bobbin. Patent Applicant Shin###Kogyo Co., Ltd. Figure 1/7 Figure 2 Figure 3 Figure 4 Figure 5 Figure/7 Figure 6 Figure 7 Figure 8 Figure 9 Figure 1O

Claims (1)

[Claims] 1. After bundling and winding a plurality of steel cables constituting the same layer in the stranded wire structure around the same bobbin, the bobbin is placed in the
A method for producing twisted wire, which comprises placing the steel wires in a strander, then pulling out these steel wires, twisting them, and then winding them up outside the twisting machine.