JPS5841638A - Twice twisted wire twisting machine - Google Patents

Abstract

PURPOSE:To reduce tension of a stranded wire cord, and to manufacture a stranded wire cord having an excellent quality, by providing a turn roller on the shaft core of the side where a feed strand goes in by a rotary body, in a twice twisted wire twisting machine which has provided a freely floatable cradle on the inside of the rotary body. CONSTITUTION:Plural steel wire strands 1 pass through a panel board 3, are twisted by a collection voice 4, become a stranded wire cord 2, are wound round an overtwist roller 5, are led into a rotary body 10, are received by a turn roller l1a, pass through a bow-like guide 13, are turned by a turn roller 11 of the opposite side, are led into a cradle 12, and are wound round a take-up reel 16. In this way, the stranded wire 2 is fed out by weak tension at a constant speed before it is rotated round the cradle 12, passes through the bow-like guide 13 rotating round the cradle, passes through the turn roller 11 of the opposite side, and is led into the cradle, therefore, twist-returning due to twice twist is executed smoothly, and a stranded wire cord which is uniform and good in its appearance is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a double-twist wire stranding machine for obtaining strands of good quality steel wire.

The quality of stranded wire, especially the quality of stranded wire used as rubber reinforcing materials such as tire cords, is determined by its straightness (curlability), rotationability (kink), repulsion (flare), and even Adhesion to rubber is important. These qualities have a lot to do with the fact that the cord is forcibly bent, rubbed, and strained by turn rollers, guide tips, etc. during the stranded wire manufacturing process. In other words, when the wire or cord is forcibly bent or rubbed, the curl of the cord is deformed and the internal stress changes, which deteriorates the uniformity of the cord and causes curls, kinks, and poor flaring. This has the disadvantage that the plating applied to the surface of the cord may be scratched off, and when these stranded wires are used as a rubber reinforcing material, they cannot perform their function satisfactorily. For this reason, in conventional wire twisting machines, in order to reduce the above-mentioned drawbacks and to minimize the resistance at the passage of the strands and stranded wire cord, the diameter and diameter of the turn rollers are increased and the number of combs is reduced. In addition, surface treatments have been applied to make the roller surface smooth, and even an arcuate guide has been installed to make the shape of the coid circular when rotating around the cradle. The current situation is that it has not yet reached the point where it is effective.

For example, with a conventional double-twist wire twisting machine as shown in Fig.
When twisting a stranded wire cord of 5 X O, 25IIIφ,
The supply wire (1) must have a tension of at least 500 g each, and if this is 1 x 5, the wire feeding force alone is 2.5 g.
kf, and further includes a mirror board 3, a collective voice 4, an overtwist roller 5, a turn roller 11. After passing through the arcuate guide 13 and the turn roller 11, the tension becomes 10.0 kf or more before being taken up by the take-up capstan 17. This tension increases the resistance between the cord and the guide rollers, guide tips, etc.

The present invention has been made to eliminate the above-mentioned drawbacks, and provides a double-twisting wire twisting machine that can easily reduce the tension of the stranded wire cord when it passes through a guide during the production of stranded wire.

An embodiment of the present invention will be described below based on the drawings. Second
In the figure, 1 is the supply wire fed out from the feed reel, 3 is the head plate that separates the supply wire 1, 4 is a collective voice that collects the supply wire 1 that has passed through the head plate 3, and 5 is the voice It is an over-twist roller and is mounted in balance with a weight 6 of the over-twist device No. 7 which rotates around the stranded wire cord 2. Reference numeral 10 denotes a rotating body that is equipped with a turn roller 11 on its axis and further has an arcuate guide 13 that rotates around the cradle 12. Among the turn rollers, at least the turn roller 11a on the wire supply side is configured to be actively rotated in the cord traveling direction by a transmission gear 9 via a bevel gear 8. -1 and 12 are cradle, inside of which are a guide roller 14, a traverse roller 15, and a take-up reel 16. is provided. The take-up reel 16 has a mechanism for winding the stranded wire onto the reel using a torque limiter, a torque motor, or the like.

Because of this configuration, the fed wire 1 passes through the end plate 3, is twisted by the collective voice 4, and is twisted into the twisted wire cord 2.
Then, it is wound around the overtwist roller 5 and introduced into the rotating body lO. The turn roller 11a provided on the axis of the rotary body 10 rotates around the stranded cord together with the rotary body, and is further forcibly rotated in the direction of movement of the stranded cord, so it takes over the stranded cord, Furthermore, the turn roller 11 of the rotating body on the opposite side is passed through the arcuate guide.
The device rotates at the cradle and sends it out into the cradle.

The fed-out stranded cord passes through an arcuate guide 13, a turn roller 11, a guide roller 14, and a traverse roller 15 with a tension necessary for winding, and is wound onto a take-up reel 16. In this case, the linear speed of the stranded cord is determined by the rotation of the turn roller 11a in the traveling direction, and the twist pitch of the stranded cord is also determined thereby. That is, in the stranding machine of the present invention, before the stranded wire is rotated around the cradle, it is sent out at a constant speed with a very low tension of 1 inch, and the bow that is rotated around the cradle is fed out at a constant speed with a very low tension. It has a structure in which it is guided through a shaped guide and into the cradle via the turn roller of the rotating body on the opposite side. Therefore, in places where the stranded wires are bent the most in a twisting cap, swung around the cradle, and roughly rubbed by guides, etc., the stranded wires are given a very weak tension to pass through. , during this time, the resistance to drop becomes very small. According to experiments, it was possible to reduce the tension in this part to about 1/2 to 1/3 compared to the conventional one. As a result, the stranded cord's curl does not change, the internal stress does not change, the plating on the surface does not get scratched off, and the stranded cord has a low tension and low resistance. Since the number of threads is small, the untwisting after twisting twice is performed smoothly, and a very uniform and clean mII cord can be obtained. ′ There is no take-up capstan even if it is inserted into the cradle, and the stranded cord is introduced with very low tension (
Furthermore, since the guide roller may have a simple structure, the structure can be simple and compact.

In the embodiment of the present invention, an arcuate guide is used in the main body of the wire twisting machine, but the same effect can be achieved even if a disk or guide roller is used instead.

Furthermore, in the one shown in FIG.
is placed on the outside, and is configured so that the turn row 5-11a immediately after passing through the collective voice 4 is actively rotated by a transmission gear 9, a bevel gear 8, etc.
This produces the same effect as the twice-twisting wire twisting machine described above.

FIG. 4 also shows that the turn rollers 11a and 11a provided on both rotating bodies 10 and 10 are connected to transmission gears 9 and 9.
, is configured to be actively rotated by a bevel gear 8.8, and is particularly effective when manufacturing thick stranded cords or when the stranding machine is large. In the above embodiment, a take-up capstan is not provided before winding, and only a guide roller is provided, but an appropriate capstan may be provided depending on the winding tension, etc.

As described above, the present invention provides a double-twist wire twisting machine in which a ladle is disposed freely inside a rotary body, and the axial center of at least the side of the rotary body into which the supply strand is introduced first. By installing a turn roller that is forcibly rotated in the direction of movement of the stranded wire cord in the section, the tension of the stranded wire cord in the double twisting machine is reduced to a low tension, and the stranded wire is twisted with very high quality. It is possible to obtain the code, and its effects are remarkable.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing a conventional double-twist wire twisting machine, FIG. 2 is an explanatory diagram showing an embodiment of the double-twist wire twisting machine of the present invention, FIG.
FIG. 4 is an explanatory diagram showing other different embodiments of the twice-twisting wire twisting machine of the present invention. . 1... Supply wire 2... Twisted wire cord 3... Mirror plate 4... Collective voice 5... ・Over twist roller 6... Weight 7... Over twist device 8 fists・- Bevel gear 9...Transmission gear 10...Rotating body 11, lla...Turn roller 12---Cradle. 13/11 arcuate guide 14...guide roller 15...traverse roller 16...take-up reel Patent applicant Hiroshi Kanai

Claims (1)

[Claims] In a double-twisting wire twisting machine in which a freely movable ladle is arranged inside the rotating body, the twisted wire is attached to the axis of the rotating body (at least on the side where the supplied strands are introduced first). A twice-twisting wire twisting machine characterized by being provided with turn rollers that are forcibly rotated in the direction in which the cord travels.