JPH03104940A - Spindle of double twister - Google Patents

Abstract

PURPOSE:To dispense with the preliminary setting of additional tension even in the case of varying the kind or size of package or the yarn count number, etc., by forming a continuous groove encircling several turns on the outer circumference of a yarn-storage part. CONSTITUTION:The objective apparatus is provided with a continuous groove 3 encircling several turns on the outer circumference of a yarn storage part 1. When an additional tension is set to a low level or there is remarkable fluctuation of reeling tension, the yarn reeled from a yarn-feed package is guided into the groove 3 on the outer circumference of the yarn-storage part 1 to absorb the yarn tension.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Object of the Invention [Field of Industrial Application] This invention relates to a spindle in a double twisting machine.

[Conventional technology]

In the spindle of a conventional double twisting machine, the yarn unwound from the yarn supply package is introduced into a tensioning device installed in the center hole of the yarn supply package, passes through the spindle center hole, and is transferred to the yarn storage section of the spindle. The fibers are sent out through a radially shaped guide tube. At that time, tension fluctuations occur in the thread, but the balloon tension is kept constant by changing the length of the thread wrapped around the outer periphery of the thread storage part of the spindle each time (for example, Utility Model Publication No. 59-43403
(see publication).

[Problem to be solved by the invention]

With the spindle of a conventional double-twisting machine, the yarn sometimes winds around the outer periphery of the yarn reservoir of the spindle many times, and in that case, the yarn wraps around the yarn that was wrapped earlier. Something like that happened. In other words, since there is a limit to the length of yarn that can be wound around the outer circumference of the yarn storage part of the spindle to absorb changing tension, the yarn unwound from the yarn supply package is wound inside the center hole of the yarn supply package as described above. The yarn is introduced into a tensioning device attached to the yarn through the center hole of the spindle, and the tensioning device can be used to easily set the additional tension depending on the type and size of the yarn supply package, yarn count, spindle rotation speed, etc. It needed to be done. Setting the additional tension in this manner is not only troublesome, but also has the problem that the larger the additional tension, the more fluff is generated.

The object of the present invention is to provide a spindle that does not require setting the additional tension in advance even if the package type, size, yarn count, spindle rotation speed, etc. change.

mouth. Structure of the Invention [Means for Solving the Problems] In order to achieve the above object, the spindle of the double twisting machine of the present invention has a groove 3 that is continuously wound a plurality of times around the outer periphery of the yarn storage portion l. It was established.

[For production]

In the spindle of the double yarn twisting machine configured as described above, when the additional tension is set to a small value or when the unwinding tension varies greatly, the yarn unwound from the yarn supply package is unwound from the yarn storage section 1. The material is guided into the groove 3 on the outer periphery of the material, and the tension is absorbed.

〔Example〕

To explain with reference to the drawings, in FIG. 1, the spindle of the double twisting machine of the present invention is also similar to the conventional double twisting machine.
The yarn unwound from the yarn supply package is introduced into a tension device installed in the center hole of the yarn supply package, passes through the spindle center hole, and passes through the yarn guide formed in the radial direction of the yarn storage part of the spindle. The yarn is sent out through the opening 2 of the tube, and a groove 3 is provided on the outer periphery of the yarn storage section 1 so that the yarn can be wound multiple times in succession. .

FIG. 2 is a diagram showing the relationship between the rotational speed of the spindle and the thread tension, and the mechanism of the balloon tension will be explained using this diagram.

The solid line is the balloon tension T, and the dotted line is the unwinding tension Tk plus the additional tension Tf applied by a tensioning device mounted in the center hole of the yarn feeding package.

The unwinding tension Tk varies depending on the outer diameter of the yarn supply package, the traverse width at the time of winding, and the like.

Ta in the figure is the tension at the so-called lag corner caused by the yarn being wound around the outer periphery of the yarn storage portion l of the spindle in order to absorb the varying tension. The tension Ta at the lag corner is proportional to the angle (lag angle) formed between the axial center of the spindle and the length of the yarn wound around the outer periphery of the yarn storage portion l of the spindle.

The relationship T=Ta+Tf+Tk holds between the above tensions. The additional tension Tf depends on the type of yarn supply package,
It is preset based on the size, yarn count, spindle rotation speed, etc., and the unwinding tension Tk decreases as the outer diameter of the yarn supply package decreases, or changes instantaneously. .

However, if this additional tension Tf is increased, it is easy to cause fluff, etc., so if a small value with less influence is chosen, as can be seen from the previous equation, the tension Ta at the lag corner must be increased. It turns out. If this is done, the delay angle will inevitably become large, but in such a case, the spindle provided with the outer circumferential groove 3 of the yarn storage portion l of the present invention is very effective. As it is configured as explained above,
This produces the effects described below.

That is, even if the value of the additional tension Tf becomes low due to the generation of fluff, leaf crumbs, etc., and the delay angle becomes large, the yarn will not be further wound on top of the previously wound yarn. In addition, once a small additional tension Tf is set, even if the package type, size, yarn count, spindle rotation speed, etc. change,
There is no need to set the additional tension each time, and there is no need to worry about that.

Furthermore, even if the tension fluctuation is large due to a decrease in the outer diameter of the yarn supply package, it can be sufficiently absorbed, and the balloon form is stabilized.

[Brief explanation of drawings]

Figure 1 is a side view of the spindle of the double twisting machine of this invention;
FIG. 2 is a diagram showing the relationship between the rotation speed of the spindle and the tension of the thread. 1- Single thread storage part, 2- Opening of thread conduit, 3 grooves

Claims (1)

[Claims] 1. A spindle for a double-twisting machine, which is provided with a groove 3 around the outer periphery of a yarn storage section 1 for continuous winding a plurality of times.