JPH0441366A - Thread winding method - Google Patents

Abstract

PURPOSE:To enable production of a cone that can be released smoothly, by varying, on the larger-diameter side of the cone, the width of traverse, wherein a change-over guide is made appear and disappear in the traverse zone when the diameter of the cone becomes at least nearly equal to the diameter of ribbon winding occurrence. CONSTITUTION:A change-over guide 2 is located near a crossing point 1 of traverse grooves, while said crossing point being at the right end of all the other crossing points of twilling grooves. The change-over guide is set in a position where selection of acting or non-acting to thread can be selected when the thread is guided to the crossing point 1 from the left side that is halfway between a traverse drum D and a guide member 4 at the center of thread traverse. The larger-diameter side of a cone-shaped bobbin B forming a cone P is located on the right side, close to the crossing point 1 on the traverse drum D. When the change-over guide 2 is projected into an acting position in the thread traverse zone, thread traverses from the left side of the traverse drum D up to a thread route shown with a dotted line, and is prevented here from further traverse. When the change-over guide 2 is retreated, the traversing thread is allowed to pass through as it is and traverse fully to a thread route shown with a solid line.

Description

Detailed Description of the Invention A1 Object of the Invention [Field of Industrial Application] The present invention relates to a method for winding yarn in a spinning machine, an automatic wine goo, 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 wine goo, a winding package is driven in contact with a traversing redrum having a traversing groove formed on its surface for traversing the yarn, and a yarn feeding bohin can be wound while 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 traverse 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 wine gourd, the winding position is dispersed by mechanically moving the winding package toward and away from the traversing tram, or by periodically applying brakes to the traversing drum to cause the surface of the winding repackage to slip. There are some that operate the ribbon winding prevention device only in dangerous areas (see Japanese Patent 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 warping machine, a release speed of 300 to 600 m/min did not pose a major problem, but in recent years, the release speed of 600 to 1000 m/min has increased.
In high-speed cancellation of in, troubles such as sluffing occur. In addition, in those that supply weft yarn by air jet, the yarn release speed is 800 to 1500.
m/mtn, the above-mentioned troubles occur frequently and become a big problem.

SUMMARY OF THE INVENTION An object of the present invention is to provide a yarn winding method that can wind a cone that can withstand high-speed unwinding without causing ribbon winding.

1. Structure of the Invention [Means for Solving the Problems] In order to achieve the above object, the yarn winding method of the present invention provides a method for winding yarn at least when the diameter of the cone reaches near the diameter at which ribbon winding occurs. A switching guide provided near the intersection of the drum grooves is moved into and out of the traverse area to vary the traverse width on the large diameter side of the cone.

[For production]

In the yarn winding device configured as described above, the switching guide moves in and out of the yarn traverse path, so that the yarn is sometimes blocked from traversing by the switching guide, and other times when the switching guide is located at the switching guide position. The traverse width changes as it passes through. The traverse width is changed on the larger diameter side of the cone.

〔Example〕

Before describing the embodiments, first, the relationship between the ribbon winding diameter of the winding package and the diameter of the traversing drum will be described. Here, for the sake of clarity, a cylindrical package, ie, cheese, will be described, but the same applies to a so-called cone, which is wrapped in a conical bohin.

The diameter of the traverse drum is Dr (mm), the number of winds of the traverse drum is Dw (mm), and the diameter of the winding package is Pr (
fflfl+), the number of winds of the winding package is Pw
(mm), the following relationship holds true between the winding package and the traversing drum: Dr-Dw-Pr-PW-(a).

Originally, Dr and Dw were fixed, so the occurrence of ribbon winding of the wound package was unavoidable.

The ribbon winding diameter R (mm) of the winding package is determined by the following formula.

Dw R=D r When it reached 200M, the third
．． Ribbon winding as shown in 4 occurs. - In this case, during one traverse of the yarn starting from point A, there is only one intersection between the left-traversing yarn and the right-traversing yarn, which is point 0.

When such a package is released, the yarn from one intersection to the next intersection is in a so-called free state, so sluffing is likely to occur if the package is released at high speed.

In formula (A), it is virtually impossible to change the diameter Dr of the traverse drum during winding package formation, so the diameter Dr of the traverse drum is constant. On the other hand, by changing the number of winds Dw of the traversing drum, the number of winds Pw of the wound package can be controlled. That is, since Dr Pw= Dw Pr, Pw is a function of Pr1DW, that is, Pw=
f (P r, Dw).

Therefore, the number of winds Dw of the traversing drum is changed to make the ribbon jump, or a curve of the number of winds that does not cause ribbon winding is formed, and the number of winds Pw of the winding package is set so that ribbon winding does not occur. be able to.

This invention was made based on this idea.

FIG. 1 is a perspective view of the main parts of the winder, showing a traversing drum D that directly traverses the yarn. Although this traversing drum D has three wind grooves formed therein, it may be formed with a groove having a different number of winds.

The switching guide 2 is arranged near the intersection l located on the rightmost side among several intersections of traversing grooves. This switching guide 2 acts on the yarn when it traverses from the left side of FIG. 1 and is guided to the intersection 1.
It is installed at a position where non-action can be selected, and moreover, it is located between the traversing drum D and the guide member 4 at the center of the yarn traverse. Note that 3 is a yarn splicing device.

The conical bobbin B forming the cone P has its large diameter side located on the right side near the intersection 1 of the traversing drum D.

When the switching guide 2 projects into its active position in the yarn traverse area, the yarn traverses from the left side of the traversing drum D to the yarn path indicated by the dotted line in FIG. 1, but further traversal is prevented. When the switching guide 2 is withdrawn from its operating position within the yarn traverse area, the traversing yarn passes through the yarn as it is and traverses all at once to the yarn path shown by the solid line in FIG.

This switching guide 2 may be anything, such as an electric hook, as long as it appears within the yarn traverse area. In the case of an electric hook as shown in Fig. 1, if the hook protrudes into the active position within the traverse area of the thread while the thread is being guided into the groove f, traverse to the left will be obstructed. It is a good idea to form a smooth slope on the right side of the hook so that the thread can easily pass through the hook without it being perceived as an obstruction. In addition, the operation of the switching guide 2 is controlled by the cone P.
This can be done by detecting with an optical sensor or the like that the diameter of the ribbon has reached the vicinity of the ribbon winding generation diameter, but the switching guide 2 may be operated at all times.

This switching of the yarn path may be performed according to a specific pattern such as operating the switching guide 2 using a traverse sensor to alternately repeat activation and deactivation, or it may be completely random.

FIG. 2 is a developed view of the traversing drum D shown in FIG. 1, and the explanation will be given again with reference to this figure.

There are two intersections of the traversing grooves on the upper side and three on the lower side. Among these, the traverse width is changed at the intersection l located on the rightmost side.

The traversing groove near the intersection 1 () has groove e deep and grooves f to g (
The yarn becomes shallower when entering from the outside to the inside, and the action of the switching guide 2 is to lift the yarn from the deep groove and pass it to the shallow groove.

If the switching guide 2 is in the non-operating position when the yarn is guided abccle through the traverse groove from the left side and approaches the intersection 1, the yarn will move through the traverse groove efghijk as the traverse drum D rotates. You will be guided. Further, when the switching guide 2 is in the operating position, the yarn is guided along the traverse groove as the traverse drum D rotates.

Therefore, the traverse width of the yarn varies depending on whether the switching guide 2 is activated or not. In this case, the groove ef part is
This means that it is a dedicated groove with a large traverse width.

Above, we have explained the method of winding the yarn by positioning the large diameter side of the cone P on the side closest to the intersection 1 on the right side, but the cone P°
If the yarn is wound with the small diameter side of the cone located close to the intersection l, unraveling will not proceed smoothly when the cone is subsequently unraveled.

Therefore, in order to improve the unraveling properties of the cone P, it is necessary to position the large diameter side of the cone P on the side closest to the rightmost intersection 1 of the traversing drum D.

C8 Effects of the invention Since this invention is configured as explained above,
This produces the effects described below.

That is, at least when the diameter of the cone reaches close to the diameter at which ribbon winding occurs, the yarn is wound with various changes in the traverse width, so the yarn path is not uniquely determined. With a cone that is shaped like this, the yarns that follow the same path tend to be dispersed, thus increasing the number of yarn intersections and reducing sluffing and tension fluctuations when releasing the cone at high speed. In other words, it is possible to produce a cone that can be smoothly released.

Further, since the traverse width is changed on the larger diameter side of the cone, the cone can be unraveled smoothly.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram showing an example of an apparatus for carrying out the yarn winding method of the present invention, Fig. 2 is a developed view of a traversing drum, and Figs. 3 and 4 show diameters of ribbon winding produced by a conventional apparatus. FIG. 3 is a front view of the package showing the ribbon-wrapped state. 1--Intersection of traverse grooves, 2-Switching guide, B--
One conical bobbin, D-------traverse drum, P cone, a, b, c, - to-traverse groove Agent Patent attorney Moto Fujii Yasushi 2wi C Fig. Fig.

Claims (1)

[Claims] 1. When the diameter of the cone reaches at least the diameter at which ribbon winding occurs, a switching guide provided near the intersection of the grooves of the traverse drum is moved into and out of the traverse area to change the traverse width on the large diameter side of the cone. How to wind the thread to hold.