JPH03177271A - Taking-up device for thread - Google Patents

Abstract

PURPOSE:To take up a package which endures the high speed release without carrying out ribbon winding by forming different number of winding grooves and a branching part for assorting threads into the thread passages corresponding to different number of winding grooves on a drum and installing a changeover guide which makes the probability for assorting threads in the branching part nearly equal. CONSTITUTION:Different number of winding grooves and a branching part 1 for assorting threads into the thread passages corresponding to different number of winding grooves are formed on a drum having the grooves for directly or indirectly traversing threads. A changeover guide 2 for making the probability of assorting threads in the branching part 1 equal is installed. The probability of assorting threads in the branching part 1 is made nearly equal by the pensence of the changeover guide 2, and the threads can be assorted equally in probability into the thread passages corresponding to different number of winding grooves.

Description

Detailed Description of the Invention A1 Object of the Invention [Field of Industrial Application] The present invention relates to a yarn winding device for a spinning machine, an automatic winder, a double twisting machine, a false twisting machine, etc. having a winding device. It is something.

[Conventional technology]

In a yarn winding device such as an automatic winder, a winding repack case is driven in contact with a traversing drum having a traversing groove formed on its surface for traversing the yarn, and a yarn feeding bobbin can be wound up while performing traversing. It is being said.

When winding yarn using the traverse drum in this way,
When the winding diameter of the winding package reaches a special relationship in which the rotational speed of the traversing drum and the winding package is an integral multiple or a fraction of an integral number, the traversing period and the winding period of the winding package are synchronized. As a result, the threads to be wound pass through the same thread path, and the threads gather in the same place and overlap, resulting in the so-called ribbon winding phenomenon.

Such ribbon winding causes sluffing, latching breakage, etc. when the yarn is released in a subsequent process, and various ribbon winding prevention devices have been proposed and put into operation.

For example, in an automatic winder, the winding position is dispersed by mechanically moving the winding package toward and away from the traversing drum, or by periodically applying a brake to the traversing drum to cause the surface of the winding package to slip. There are those that cause the ribbon winding to occur, and those that activate the ribbon winding prevention device only in dangerous areas (see Japanese Patent Application Laid-open No. 161681/1983).

[Problem to be solved by the invention]

Although the above-described conventional ribbon winding prevention device is effective to some extent, it cannot sufficiently withstand the high-speed release in recent years. For example, when releasing yarn from packages supplied to a warper, 300 to 60
This was not a big problem when releasing at 0 m/a+in, but in recent years, when releasing at high speeds of 600 to 1000 m/win, troubles such as sluffing occur. In addition, in those that supply weft yarn by air jet, the yarn release speed is as high as 800 to 1500 m/sin.
The above problems occur frequently and have become a major problem.

The present invention aims to provide a yarn winding device capable of winding a package that does not involve ribbon winding and can withstand high-speed unwinding.B6 Structure of the invention [Means for solving the problem] In order to achieve the object, the yarn winding device of the present invention provides a tram having a skin for directly or indirectly traversing the yarn, grooves with different numbers of winds, and threads in the yarn paths corresponding to the grooves with different numbers of winds. It forms a branch part that distributes the
A switching guide is provided to make the distribution probability of yarns at the branching portion approximately equal.

[For production]

In the yarn winding device configured as described above, the existence of the switching guide makes the distribution probability of the yarn at the branching part of the drum approximately equal, and the yarn is stochastically distributed in the yarn path corresponding to the grooves with different numbers of winds. distributed evenly.

〔Example〕

Before describing the embodiments, first, the relationship between the ribbon winding diameter of the winding repack cane and the diameter of the traversing tram will be described.

If the ribbon winding diameter of the winding package is R (mm), the number of winds of the winding package is Pw, the diameter of the traverse drum is Dr (IIlffl), and the number of winds of the traverse drum is Dw, then the ribbon of the winding package is The winding diameter is determined by the following formula.

Dw R= Dr x --(a) Dw For example, in the case of Dr=10011n and Dw=2 winds, the ribbon winding generation diameter R1 of one wind of the winding rebound cane
is R1=100X2/1=200(-), and when the diameter of the wound package becomes 200+w,
．． Ribbon winding as shown in 5 occurs. in this case,
While the thread traverses from point A as a starting point, there is only one point of intersection, point C, between the thread going left and the thread going right. When such a package is released, the thread from one intersection to the next intersection is in a so-called free state, so
When the speed is released, sluffing becomes more likely to occur.

Next, embodiments of the apparatus of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view of the main parts of the winder, showing a traversing drum D that directly traverses the yarn. The traverse grooves are formed as grooves with different numbers of winds. That is, when the traverse drum D rotates in the direction of the arrow, when the yarn traverses from the right to the left, the yarn traverses from the branch part 1 through either the 2-wind groove a or the 3-wind groove n. , grooves a and n having different wind numbers are formed. 3 is a yarn splicing device provided in the winder.

In addition, in this example, in order to make the explanation easier to understand,
Although the cases where the number of winds of the traversing groove is 2 and 3 are shown, other combinations of different numbers of winds are also possible. For example, 3 winds and 4 winds, 1.5 winds and 2.5 winds, etc. are possible.

FIG. 2 is a developed view of the traversing tram shown in FIG. 1. As described above, the branch portion 1 is formed near the right folded end. The groove for traversing from right to left is groove abcde f for 2 winds and nop nop for 3 winds.
Qrcdef.

Each of these shares a part. Note that the traverse groove from left to right has a length of 1 m and is a 3-wind groove.

Therefore, at the branch point 1 of /Jla%n, the number of winds of the yarn wound into the winding package changes depending on whether the guided yarn enters the groove a or In. That is, the number of winds is 3 if the thread path is indicated by the solid line in FIG. 1, and 2 winds if the thread path is indicated by the broken line in FIG.

Next, an example of a thread path switching means will be described with reference to FIGS. 1 and 3.

Naturally, even without providing a means for switching the yarn path, it is difficult to make the probability of distribution to the grooves aSn at random to some extent at the branching part of the traversing red drum to be equal due to the influence of the winding tension and the like.

A plate-shaped switching guide 2 for regulating the yarn path is provided in the traverse area near the branch point l of Sokote, *a, and n. This switching guide 2 is located between the traversing tram D and the guide member 4 at the center of the yarn traverse, and forms a yarn receiving portion 5.6 facing the direction of entry of the traversing yarn. There is. In order to guide the incoming yarn to 1lla and n of the traversing tram D, the yarn receiving section 5.6 guides the former from the latter, that is, the yarn receiving section 5 is placed in front of the yarn receiving section 6 in the yarn entry direction. It stands out. Further, the yarn receiving portion 5.6 is provided with a recess or a slope as shown in the figure in order to reliably receive the traversing yarn.

By the way, the thread does not simply traverse along the same route, but constantly and subtly fluctuates due to inertial force and fluctuations in thread tension during the traverse motion. However, this variation in the traverse path is not irregular at all, and as shown in FIG. 3, it varies in a state close to a normal distribution centered on a certain position. Therefore, the thread receiving part 5
In order to make the probability of receiving the thread into the thread receiving part 6 almost equal, the boundary between the thread receiving part 5 and the thread receiving part 6 is adjusted and fixed so that it is in the most frequent position as shown in the figure. do. Reference numeral 7 denotes a long hole for adjusting the position, and the position is adjusted by loosening a screw each time the thread count is changed or the tension is set.

Note that the means for switching the yarn path is not limited to the one fixed in position as described above, but the means for switching the yarn path is not limited to the one with a fixed position as described above.
It is also possible to use a movable switching means that performs the operation of distributing the threads to the threads regardless of the rotation of the traversing drum D.

In the ribbon winding generation diameter, the more intersections of threads on the winding package, the fewer threads will pass through the same path.
Therefore, the ribbon is dispersed, tension fluctuations are reduced when the package is released, and sluffing and thread tangles are less likely to occur.

C1 Effect of the invention Since this invention is configured as explained above,
This produces the effects described below.

In other words, due to the existence of a switching guide that randomly distributes yarn with equal probability, the yarn path cannot be unambiguously determined, so the wound package follows the same path regardless of the ribbon winding diameter. The passing threads tend to be dispersed, thus allowing for more thread intersections and reducing sluffing and tension fluctuations during high speed release of the package. In other words, it is possible to produce a package that can be smoothly released.

Furthermore, since the thread distribution probability is equal, there is no bias toward one thread path, which further enhances the above-mentioned effect.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing an example of the device of the present invention, Fig. 2 is a developed view of the traversing drum, and Fig. 3 shows the relationship between the switching guide and the traverse position and frequency of the yarn entering the yarn receiving section. Figures 4 and 5 are front views of the package showing the state of ribbon winding at the ribbon winding diameter obtained by the conventional device. Branching point, 2--Switching guide, 5, 6 Yarn receiver, D - Winding package, 1 1 1 traverse groove

Claims (1)

[Claims] 1. A drum having grooves for directly or indirectly traversing the yarn is formed with grooves having different numbers of winds and a branching part for distributing the yarn to yarn paths corresponding to the grooves having different numbers of winds,
A yarn winding device that is provided with a switching guide that makes the distribution probability of the yarn approximately equal at the branching portion.