JPH027737B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for manufacturing a stranded wire including a wire with a modified cross section, and more specifically, a wire having a modified cross section other than a circular cross section and a wire having a circular cross section. The present invention relates to a method for manufacturing a mixed stranded wire in which the strands are twisted together to form the same stranded layer around a center line.

[Conventional technology]

As shown in Figure 2, an irregular cross-section strand made of a highly conductive material such as copper or aluminum alloy and having a cross section other than a circular cross section (hereinafter simply referred to as an irregular strand)
2 and a wire having a circular cross section (hereinafter simply referred to as round wire) 1 made of a high tensile strength material such as copper are twisted in the same layer around a solid or hollow center line 3. Since the strands 2 have a non-circular cross section, they cannot be twisted together with a twist, and therefore are manufactured using a twisting machine that does not have a twist.

[Problem to be solved by the invention]

However, stranded wires twisted by a twisting machine that does not allow twisting have a weak clamping force between the strands as a whole, and in particular, the round wire 1 is made of a high tensile strength material such as steel wire with a large elastic restoring force. In some cases, a large torsional stress remains in the strands, which tends to rotate in the opposite direction to the direction of rotation of the strands and try to loosen them, causing the entire strand to come apart. It was almost impossible to obtain twisted wire.

[Means to solve the problem]

The present invention was made in order to eliminate such conventional inconveniences, and the present invention has been made in order to eliminate such conventional inconveniences. A step of twisting a plurality of circular cross-section strands arranged around the center line and sending them out at the same time; a step of guiding the strands to a mating die and arranging the irregular cross-section strands and the circular cross-section strands alternately in the circumferential direction of the center line, and converging them so as to form the same twisted layer around the center line; The method includes the step of imparting a twisting twist in a direction opposite to the twisting direction to the bundled wire group consisting of the irregular cross-section wire and the circular cross-section wire.

In addition, the present invention provides a center line and a plurality of irregular cross-section strands arranged around the center line without twisting, and a plurality of circular cross-section strands arranged around the center line. a step of feeding out the twisted cross-section strands at the same time with a twist; a step of suppressing twisting rotation of each of the fed-out irregular cross-section strands about their own longitudinal axis; Each circular cross-section wire is guided to a common twisting die, and the irregular cross-section wire and the circular cross-section wire are arranged alternately in the circumferential direction of the center line, and the same twisted layer is placed around the center line. and a step of imparting a twisting twist in a direction opposite to the twisting direction to the bundled wire group consisting of the irregular cross-section wire and the circular cross-section wire. It is.

[Effect]

Since the irregularly shaped wires are not twisted, the posture they should take within one twisted layer is constant, and together with the round wires mixed in every other wire, they densely form one continuous cylindrical twisted layer. .

In addition, since the round wires are twisted in the opposite direction to the twisting direction, the torsional elastic restoring force of each round wire also generates a rotational force in the direction that further promotes the twisting, which causes the twisted wires to become loose. Tighten better without straining.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG. 1, which shows an example of an apparatus for carrying out the method of the present invention.

In this figure, what is designated as a whole by the reference numeral 9 is a feeding device for the round wire 1, and in this example, four feeding bobbins 91 for the round wire 1 are connected to the center of the feeding wire via a rotating frame 92. It is mounted rotatably around the axis. The mechanism for rotating each rotating frame 92 includes, for example, a spur gear 93 fixed to the shaft of each rotating frame 92 as shown in the figure, and a drive gear 94 fixed to a hollow shaft located at the center position.
The drive gear 94 may be engaged with the drive gear 94 from the periphery and rotated at the same time by the drive gear 94. A solid or hollow center line 3 of the twisted wire runs along the central axis position of this hollow shaft, and a rotating frame 92 runs around this center line 3.
By the rotation of the wire, four twisted round wires 1 are sent downstream.

The one indicated by the symbol 8 as a whole is the irregularly shaped wire 2.
This is a feeding device in which four irregularly shaped wire sending bobbins 81 are mounted, from which four irregularly shaped wires 2 are loaded.
is sent out.

The center line 3, the four round wires 1, and the four irregularly shaped wires 2 are arranged in the relative positional relationship shown in FIG.
At this point, each wire is focused toward the winding bobbin 5 so as to assume the cross-sectional position shown in FIG.

The take-up bobbin 5 is mounted on a rotating frame 4 that is driven to rotate about the central axis of the twisting die 6. In other words, the device shown in Fig. 1 is a winding and rotating type wire twisting machine, and by rotating the rotating frame 4, the round wire 1 and the irregularly shaped wire 2 are twisted in the same number and in the same direction. is granted. In this case, of course, the center line 3 is given the same number of twist turns in the same direction, but if this is not desired, the delivery bobbin (not shown) of the center line 3 is rotated around the axis of the center line 3. It is sufficient to rotate it in the same direction and at the same rotation speed as 4.

In this manner, the stranded wire S including the irregularly shaped wire 2 having the cross-sectional shape shown in FIG. 2 is wound onto the winding bobbin 5.
In this stranded wire S, since the round wires 1 are twisted, the torsional elastic restoring force of each round wire 1 acts as a rotational force in the direction of further tightening the twist of the stranded wire S inside the stranded wire S. Therefore, even if the round wire 1 is made of a high tensile strength material such as a steel wire, the strands will not come loose or become loose. Furthermore, round line 1
The direction of the twisting twist applied to the round wire 1 is of course opposite to the direction of the twisting twist of the entire stranded wire, and the degree of twisting, that is, the twisting rate, can be selected appropriately depending on the diameter of the round wire 1, the material, etc. .

By the way, since the wire twisting machine shown in FIG. 1 is of the winding and rotating type as already mentioned, the twisting twist given to the bundled strands by the rotation of the rotating frame 4 in the direction of the arrow shown is in the S twist direction. Also, the twisting of the round wire 1 indicated by the arrow in the figure is the Z twisting direction, and these directions are opposite to each other, as specified in the claims.

The method according to the embodiment of the present invention described above can be carried out in exactly the same manner using the cage rotating type wire twisting machine shown in FIG. In this case, in order to give the round wire 1 and the irregularly shaped wire 2 the same number of twist twists in the same direction, they are connected to the round wire delivery section 12A and the irregular shaped wire delivery section of the same rotary cage 12, respectively. 12
It is sent out from B. In FIG. 3, elements that are the same as or correspond to those shown in FIG. 1 are designated by the same numbers. In addition, in the same figure, the reference numeral 16
21 is an under roller that rotatably supports a hollow cylindrical rotary cage 12; and 21 is a rotary cage 1.
Reference numeral 20 indicates a drive gear that engages with and rotates the ring gear 21, reference numeral 14 indicates a drive shaft, and reference numeral 15 indicates a fixed winding bobbin. Further, the arrows shown in FIG. 3 indicate that the twist applied to the round wire 1 is a Z twist, and the twisted twist applied to the round wire 1 is an S twist.

Note that the method described with reference to FIG. 1 (winding rotation type) and FIG. 3 (cage rotation type) corresponds to the first claim.

Another embodiment of the invention will now be described with reference to the example of the apparatus shown in FIG. 4 for carrying out the method. In the apparatus shown in FIG. 4, the same reference numerals are used for the same elements as in the apparatus of FIG. The characteristic process in this embodiment is that in order to ensure the correct phase of the irregularly shaped strands 2 converged on the twisting die 6, a rotation-preventing dividing plate 17 is used to ensure that each irregularly shaped strand 2 is aligned with its own. This prevents the twisting and rotation around the longitudinal axis from progressing towards the twisting die 6. For example, as shown in FIG. 4 and FIG.
It is sufficient to guide the wire to the twisting die 6 through the anti-rotation device 18 made of 18B, thereby making it possible to obtain a twisted wire with a more regular shape.

In addition, when carrying out this invention, a twist pattern may be further added to the round wire 1 fed out with a twist. That is, as shown in FIGS. 4 and 6, for example, a corrugating die 10 having corrugating holes 101 formed therein or a twisting device such as a zigzag arrangement roll (not shown) is attached to the dividing plate 17, and the twisting die is The round wire 1 is given a spiral twist before being introduced into the wire 6.
Addition of this process is effective when the round wire 1 is made of steel wire or the like with particularly high rebound resilience, and a part of the round wire 1 may jump out from the surface of the twisted stranded wire, causing the stranded wire to collapse. This is effective in preventing this and easily manufacturing stable stranded wires. Although not shown, it is of course possible to produce a multilayer stranded wire containing irregularly shaped wires in each layer by installing round wire and irregularly shaped wire feeding devices in multiple stages.

Note that the manufacturing method using the apparatus shown in FIG. 4 described above corresponds to the first and second claims of the claims.

〔Effect of the invention〕

According to this invention, in the production of a mixed stranded wire that includes a wire with an irregular cross section and a wire with a circular cross section in the same twisted layer, since the irregular cross section wire is not twisted, one twisted layer is produced. The posture inside the wire is stabilized in a predetermined direction, resulting in a highly consistent mixed stranded wire, and since the circular cross-section strands are twisted in the opposite direction to the twisting direction, their torsional elasticity is restored. The force acts in the direction of tightening the strands further,
Therefore, it is possible to obtain a tightly-tight mixed stranded wire without unraveling or loosening.

[Brief explanation of drawings]

FIG. 1 is a simplified side view showing an example of an apparatus used to carry out the method according to one embodiment of the present invention, FIG. 2 is an enlarged sectional view taken along the - line in FIG. 1, and FIG. 3 is an embodiment of the present invention. FIG. 4 is a simplified side view showing an example of an apparatus used to carry out another embodiment method of the present invention; FIG. View from arrow A in Figure 4,
FIG. 6 is a perspective view of the twister (corrugating die). 1... Circular cross-section strand (round wire), 2... Irregular cross-section strand (irregular-shaped strand), 3... Center line, 4... Rotating frame,
6... Twisting die, 7... Separating plate, 8... Irregular cross-section strand feeding device, 9, 19... Circular cross-section strand feeding device, 12... Rotating cage, 18...
Anti-rotation device.

Claims (1)

[Claims] 1 (a) A center line 3 and a plurality of irregular cross-section strands 2 arranged around the center line 3 without twisting and arranged around the center line 3. (b) Twisting a plurality of circular cross-section strands 1 together and sending them out at the same time; The irregular cross-section strands 2 and the circular cross-section strands 1 are alternately arranged in the circumferential direction of the center line 3 by being guided through a mating die 6, and are twisted to form the same layer around the center line 3. (c) a step of imparting a twisting twist in a direction opposite to the twisting direction to the bundled wire group consisting of the irregular cross-section wire 2 and the circular cross-section wire 1; A method for manufacturing a stranded wire including a wire with an irregular cross section. 2 (a) A center line 3 and a plurality of irregular cross-section strands 2 arranged around this center line 3 without twisting, and a plurality of circular cross-sections arranged around the center line 3. a step of twisting the strands 1 and sending them out at the same time; (b) a step of suppressing twisting rotation of each of the fed out irregular cross-section strands 2 about its own longitudinal axis; ) The center line 3, each irregular cross-section strand 2, and each circular cross-section strand 1 are guided to a common twisting die 6, and the irregular cross-section strand 2 and the circular cross-section strand 1 are twisted in the circumferential direction of the center line 3. a step of arranging them alternately and converging them so as to form the same twisted layer around the center line 3; A method for manufacturing a stranded wire including irregular cross-section strands, the method comprising the step of imparting a twisting twist in a direction opposite to the direction of the twisting to the wire group.