JPH02282168A - Twist yarn doubling guide device - Google Patents

Abstract

PURPOSE:To obtain a cord consisting of first twist yarn with uniform doubling quality and no damage by arranging convergent guide rollers between the first and second guide rollers in a position where rotary shafts of the convergent guide rollers cross with rotary shafts of the first guide roller and/or the second guide roller. CONSTITUTION:Convergent guide rollers 7, 9, arranged between the first and second guide rollers 2 and 11, are arranged in a position in which roller rotary shafts 5, 6 of the convergent guide rollers 7, 9 cross with roller rotary shafts 3, 10 of the first guide roller 2 and/or the second guide roller 11. As a result, since one-way directional twist is provided in a first twist yarn 1, in a process of feeding the first twist yarn while it is adapted to the guide rollers 2, 7, 9, 11, in accordance with a lapland angle of the respective first twist yarn, it is moved in the axial direction respectively by a fixed distance on the convergent guide rollers 7, 9 and the second guide roller 11 providing an axis in a direction crossing with the transfer direction of the first twist yarn. Accordingly, each first twist yarn 1, focusing without overlapping with each other, can be transferred to the next process of final twist yarn.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a guide device for plying twisted yarns, and more particularly to a guide device for plying pre-twisted yarns obtained from highly rigid glass fibers or the like.

[Conventional technology]

Glass fiber rubber cord is used as a reinforcing material for rubber in belts such as timing belts and toothed belts, as well as tires and hoses. For example, timing belts are used in automobile engines, power tools, hydraulic machines, concrete mixers, etc., and are subject to severe dynamic bending fatigue. It is spirally wound and has an excellent effect on reinforcing belts. The above-mentioned rubber cord is a bundle of glass fibers, and as shown in Fig. 6, 3 to 20 first-twisted strands L are aligned parallel to the guide roller 21 and sent through a U-shaped groove. The held gold thread guide 20 bundles and doubles the threads, and then sends them through a guide roller 22 to a ply twister (not shown), where the threads are twisted. A rubber cord having a predetermined structure, tensile strength, and apparent diameter can be obtained by adjusting the number of doublings of the strands L or the degree of twisting. In the process of doubling a plurality of plied yarns l, in addition to the doubling guide 20 having a U-shaped groove shown in FIG. 1, a gold thread guide (not shown) having a V-shaped or circular hole is used. This is done by passing etc.

[Problem to be solved by the invention]

According to the conventional gold thread method described above, since the passing position of the first twisted yarn 1 to be doubled on the yarn doubling guide 20 is not determined, the guide roller 22 that guides it to the final twisting machine and the feed roller (not shown) of the final twisting machine are used. As shown in the partial cross-sectional view of the roller in FIG. 7 above, the first twisted yarns 1 are overlapped. For this reason, for the overlapping plied yarns 1, the driving radius on the guide roller 22 and feed roller, that is, the distance between the center of these rollers and the portion of the plied yarn in contact with the rollers, is
The lower twisted yarn that is in direct contact with the roller and the lower twisted yarn that overlaps the lower twisted yarn are different from each other, and the guide roller 2
2 and feed rollers to the ply-twisting process are different between the respective ply-twisted yarns 1, and there is a drawback that uniform alignment performance cannot be obtained. However, since glass fiber is a highly rigid fiber material, ply-twisted yarn, which is obtained by combining ply-twisted yarns made of glass fibers with different alignment characteristics, is made by bundling elastic materials such as synthetic fibers. Unlike yarn, the load applied to each ply twisted yarn 1 varies. In addition, during the yarn doubling process, the lower twisted yarn l is placed in a specially shaped doubling guide 20.
If you forcibly double the yarns on the upper part, the lower twisted yarn will be 1 space or 1 lower twisted yarn.
The lower twisted yarn l may be damaged due to friction between the yarn doubling guide 20 and the yarn doubling guide 20. When a rubber cord made of ply-twisted yarn made through such a gold thread process is used as a reinforcing material for belts or tires, the tension is concentrated on a specific ply-twisted yarn, or some ply-twisted yarns are damaged, so that the rubber cord as a whole However, it has the disadvantage that it cannot exhibit sufficient tensile strength and cannot be used as a reinforcing material for belts and tires used under severe conditions. SUMMARY OF THE INVENTION It is therefore an object of the present invention to overcome the drawbacks of the above-mentioned prior art techniques and to obtain a cord made of ply-twisted yarn that has uniform alignment properties and is free from damage.

[Means to solve the problem]

The above object of the present invention is achieved by the following configuration. That is, a first guide roller that guides the first twisted yarn drawn in parallel, a converging guide roller that combines the first twisted yarn transferred from the first guide roller, and a first twisting of the convergent first twisted yarn from at least one converging guide roller. In a twist yarn doubling guide device equipped with a second guide roller for sending out to a machine, the converging guide roller disposed between the first guide roller and the second guide roller has its roller rotation axis aligned with the first guide roller and the second guide roller. or a twisting yarn doubling guide device disposed at a position intersecting the roller rotation axis of the second guide roller. Further, the convergence guide roller includes at least a pair of guide rollers between which the ply twisted yarn is passed, or the rotational axis of at least one convergence guide roller is perpendicular to the roller rotation axis of the first guide roller and/or the second guide roller. placed in position.

[Effect]

Since the ply-twisted yarn has a unidirectional twist, the lapland angle of each ply-twisted yarn (both ends of the portion where the ply-twisted yarn is in contact with the guide roller surface and The guide roller rotates in one direction by a certain distance on the convergence guide roller and the second kite roller, each of which has an axis in a direction that intersects the transport direction of the first twisted yarn, depending on the angle formed by the straight lines connecting the centers of the roller rotation axes. Moving. Therefore, each ply-twisted yarn is converged without overlapping each other, and can be transferred to the next ply-twisting process. Note that the present invention is applicable not only to glass fibers but also to twisted yarns made of other highly rigid fibers such as ceramic fibers and carbon fibers.

【Example】

An embodiment of the present invention will be described. The guide device for twisting yarns is shown in FIG. 1 and FIG. 2 viewed from a direction perpendicular to FIG. 1. A rotating shaft 5 is installed below the guide roller 2 that guides the plied yarn l in a direction perpendicular to the rotating shaft 3 of the guide roller 2.
．． Two converging guide rollers 7 and 9 having a diameter of 6 are provided. These two convergence guide rollers 7.9 are arranged with a step difference in the direction of transfer of the first twisted yarn, and with a distance between the rollers in the direction perpendicular to the direction of transfer of the first twisted yarn. Furthermore, a guide roller 11 having a rotating shaft 10 in a direction perpendicular to the rotating shaft 5.6 of the focusing guide roller 7.9 is provided downstream of the converging guide rollers 7.9 in the ply-twisted yarn transfer direction. There is. These guide rollers 2, 7, 9.degree. 11 can all freely rotate around their respective rotation axes 3, 5.6.degree. 10. The first twisted yarn 1 whose direction has been changed by the guide roller 2 passes between the first convergence guide roller 7 and the second convergence guide roller 9 and is transferred to the guide roller 11. Therefore, half of the plied yarns 1 are connected to different convergence guide rollers 7.9.
come into contact with. The gold thread process of this example will be explained. Twisted strands sent from a creel (not shown) are guided as lower twisted yarns 1 on guide rollers 2 in parallel to each other, and their feeding direction is changed by guide rollers 2. It reaches between the converging guide roller 7 and the second converging guide roller 9, and here, as shown in FIG. 1 and FIG. 1 is in contact with the second convergence guide roller 9, and the lower twisted yarn 1, which was located in the left half of the guide roller 2'' in FIG. 1, is in contact with the first convergence guide roller 7.
comes into contact with. At this time, if the lower twisted yarn l is twisted as shown in FIG. 3, the lower twisted yarn l on the side that comes into contact with the second convergence guide roller 9 is twisted in the direction shown by the dotted line in the drawing. When coming into contact with the second convergence guide roller 9, the second convergence guide roller 9J: is moved in the direction of the arrow, which is the direction of the roller rotation axis, as the lower twisted yarn 1 is transferred in the direction of arrow A. The runland angle σ formed by the lower twisted yarn l at position a on the guide roller 2 shown in FIG. Because it is larger than the lapland angle β formed on the biconvergent guide roller 9 (see Figure 4)
, the displacement amount on the second convergence guide 9 is larger than that of the first twisted yarn 1 at position b of the guide roller 2 shown in FIG. Therefore, a on the guide roller 2 in Figure @1. As shown in FIG. 2, the first twisted yarn l located at position b comes into contact with the second convergence guide roller 9 at points ab', respectively. Furthermore, the lower twisted yarns 1 located at positions c and d on the guide roller 2 in FIG. Therefore, the lower twisted yarn 1 comes into contact with the first convergence guide roller 7 at positions 5t and 5t on the first convergence guide roller 7 in FIG. 2, respectively. Next, when the first twisted yarn 1 sent to the guide roller 11 via these two convergence guide rollers 7.9 comes into contact with the guide roller 11 in the same way, it is shifted in the twisting direction of the first twisted yarn 1. That is, a' of the second convergence guide roller 9 in FIG.
As shown in FIG. 1, the first twisted yarn l located at b' comes into contact with the guide roller 11 at positions A and B, respectively. Similarly, 1. of the first convergence guide roller 7 in FIG. The first twisted yarn l located at position d# is attached to the guide roller l.

[, and contact each other at position C9D. FIG. 5(a) shows the position of each lower twisted yarn l on the guide rollers 2, 7, 93 and 11 on the rotating shafts 3 and 9 of the guide rollers 2 and 11. The figure is shown as viewed from the direction along the plane formed by lO. Also, Figure 5 (
b) is the rotating shaft 3 of the guide roller 2 and the guide roller 1.
The plane defined by the rotating shaft 10 of FIG. 1 indicates the arrangement of each lower twisted yarn I on a vertical plane during the yarn doubling process. That is, (a) is on the guide roller 2, (b) is the midpoint between the guide roller 2 and the first converging guide roller 7, and (c) is the midpoint between the first converging guide roller 7 and the second converging guide roller 9. Points (D) and (E) respectively indicate the midpoint between the second convergence guide roller 9 and the guide roller 11 and the arrangement on the guide roller 10-11. In this way, the width in the direction perpendicular to the transport direction of the first group of plied yarns is Q l s on the guide roller 2, and 1 at the midpoint between the first convergence guide roller 7 and the second convergence guide roller 9.
22, and Q on the kite roller 11, the relationship a l>a Z >Q holds between them, so gold thread is possible. At this time, from experience, it is desirable that the distance in the horizontal direction between the roller surfaces of the opposing portions of the first convergence guide roller 7 and the second convergence guide roller 9 is at least N-d/2 and at most N-d. It turns out. However, N is the lower twisted yarn l to be doubled.
is the number of yarns, and d is the apparent diameter of the first twisted yarn I. This is because if the above-mentioned distance becomes less than N-d/2, the yarns collide with each other, and as a result, the yarns overlap on the guide roller 2 or on the feed roller (not shown) of the twisting machine. Furthermore, the vertical distance between the first convergence guide roller 7, the second convergence guide roller 9, and the rotating shafts 5, 6 may be zero, but workability improves when h is increased. In addition, if the rotating shafts of the first convergence guide roller 7 and the second convergence guide roller 90 are connected at both ends thereof and configured to rotate around the center of the connecting member, the distance and h can be finely adjusted. can. In this way, gold threads are formed on the guide roller 9 and on the feed roller of the ply twisting machine, which do not overlap, are closely aligned, and have good alignment properties. Although a pair of convergence guide rollers is used in this embodiment, the present invention is not limited to this, and depending on the number of plied yarns to be twisted, the degree of twist, etc., - or more convergence guide rollers may be used. may be arranged intersecting each other. Number of strands drawn: 13, number of twists: 2. The apparent catenary of OT/2511 was measured in a span of 500 nm using a cord with a diameter of 1.3 mm, and the catenary value was reduced to 0.30% from 0.40% in the conventional one. Considering that the minimum value according to the catenary measurement method is about 0.25%, this value can be said to indicate that almost perfect alignment has been obtained. In addition, a catenary is a ply-twisted cord cut to a length of 500 m, and after untwisting the ply-twisted yarn, the length of the longest thread and the shortest thread of each ply-twisted thread is 2 and Ll, respectively. This value is calculated using the following formula. Catenary], OOX (t, t -Ll 1500
) [Effects of the Invention] Since the pulling property of the ply-twisted yarn can be obtained with a simple device, the catenary value can be reduced even for a cord having high rigidity, for example, obtained from glass m1m. Further, in the gold thread process, there is no need to forcibly converge the ply-twisted threads using a specially shaped guide, so there is no risk of damaging the cord. Therefore, a cord with high tensile strength can be obtained, and the reinforcing effect of belts and tires using the cord can be improved.

[Brief explanation of drawings]

1 and 2 are a guide device for twisting and doubling yarns of the present invention, FIG. 3 is a plan view showing a state in which the first twisted yarn is in contact with the guide roller, and FIG. 4 is a plan view showing the first twisted yarn being placed on the convergence guide roller. FIG. 5 is a side view showing the arrangement of the first twisted yarns on each guide roller or between the guide rollers, FIG. 6 is a drawing showing a conventional guide device, and FIG. FIG. 3 is a partial cross-sectional view showing the overlapping of plied yarns on a gold thread guide in a conventional guide device. Agent Patent Attorney Takayoshi Matsunaga '-Old 1-i4a',b''
Vo: kir4doora-'yht'n'FEE shi, 5a
ll-c', d' ・ Kuzu-naki l' Idro・, Kukuμ4 Lower jj1to4 I Bunkan A~D is Idrola//
)-Deme 1,000,000,000,000,000,000,000,000,000,000,000,000,000,00000000000000000000000000000000000000000000000000000000000000 that 1L (ro) (Sho・) Fig. 5 (b), ''・e DCBA 't--tis-A

Claims (3)

[Claims] (1) A first guide roller that guides the first twisted yarn drawn in parallel, at least one convergent guide roller that combines the second twisted yarn transferred from the first guide roller, and a second guide roller that guides the first twisted yarn from the first guide roller. In a twisting yarn doubling guide device equipped with a second guide roller for sending out to a twisting machine, one or more converging guide rollers disposed between the first guide roller and the second guide roller have their roller rotation axis set to the second guide roller. A twisting yarn doubling guide device characterized in that it is arranged at a position intersecting the roller rotation axis of one guide roller and/or the second guide roller. (2) The twisted yarn doubling guide device according to claim 1, wherein the convergence guide roller comprises at least a pair of guide rollers between which the first twisted yarn is passed. (3) Claim 1 characterized in that the convergence guide roller is arranged at a position where its rotation axis is orthogonal to the roller rotation axis of the first guide roller and/or the second guide roller.
Or the guide device for twisting and doubling according to 2.