JPH0373760A - Taking-up of yarn and device therefor - Google Patents

Abstract

PURPOSE:To improve fraying performance and prevent the rise of ear part and arrange the package edges by increasing the rate of selecting the outside turn line than the rate of selecting the inside turn line. CONSTITUTION:The shorter diameter part division 20A of a synchro cam 20 is set larger than the longer diameter part division 20B, and the rate of selecting the outside turn line is set larger than the rate of selecting the inside turn line. Therefore, the cyclic selection for the traverse edge is changed from outer outer inner inner to outer outer inner (or outer outer outer outer inner), and the amplitude of the traverse width is changed from the distance difference between the inner inner traverse and the outer outer traverse to the distance difference between the inner outer tranverse and the outer outer traverse, and the amplitude difference is reduced to the half. Therefore, also the variation of the taking-up tension reduces, and the creeping ratio and the degree of freedom in setting the creeping length are spread. Further, when the cyclic selection for the traverse edge is outer outer inner, superposition is generated in the seventh turn, and the degree of ribbon winding can be reduced.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a yarn winding device for winding yarn onto a bobbin or the like in various spinning machines such as a spinning device, a yarn twisting device, and a wine goo. There are two turn lines formed by the left and right traverse ends of the yarn, an inner and an outer turn line, and the yarn winding method involves periodically selecting and traversing between the two inner and outer turn lines.

[Conventional technology]

A typical example of a turn line created by the conventional yarn winding method is shown in Fig. 10(a), where the left and right traverse ends of the yarn are ■→■→■→
It progresses from ■→■～■ (repeat ■～■), changes the traverse width and turns.

This change during traverse is performed by a combination of making the turn line into two inner and outer turns, llllA1 and A, and further changing each turn line A, , A, (bending inward). By the way, the reason why the two turn lines AI and A3 are used is mainly to prevent ribbon winding. Also, change each turn line A,,A,(
The reason for bending inward is mainly to prevent ear height. In order to avoid both ribbon winding and selvedge height, there are two turn lines, each of which is bent.

Ear height occurs when the traverse width is kept constant, and the phenomenon in which the yarn layer at the folded position at the traverse end becomes thicker and the yarn layer at the traverse end protrudes is called selvage height.If the selvage height increases, the package shape deteriorates. In addition, the contact pressure exerted by the touch roller becomes excessive, and the unwinding property of the yarn deteriorates. Therefore, each turn line of the traverse is bent inward to disperse the yarn layer at the turn-back position.

This operation is called creeping. That is, in FIG. 10(a), the ratio (Tt/T+) of the section T2 bent inward to the creeping cycle T of the outer turn line A1 is called the creeping ratio. By optimizing the creeping ratio, the height of the edges of the package can be prevented. Also, the inner turn line A2
The same creeping ratio as above (Fig. 10(a)
), the ratio is 100%), it is possible to prevent the ear height on the inner turn line A.

Ribbon winding occurs when threads overlap directly and parallel to each other over a certain length on a package, and the phenomenon in which the overlapping thread portions become intertwined with each other is called ribbon winding. This ribbon winding deteriorates the unwinding properties of the yarn.

Therefore, the degree of overlap is reduced by periodically selecting and traversing between the two inner and outer turn lines. In FIG. 12, which conveniently shows the case where there is no creeping, the traverse ends of ■ to ■ are periodically selected from outside → outside → inside → inside.
The thread trajectory between ■■ (1), the thread trajectory between ■■ (2), the thread trajectory between ■■ (3), and the thread trajectory between 1 and ■■ (4) are all different and do not overlap. Thread trajectory between ■■ which is a turn (1)
This will overlap. Therefore, the degree of overlap is smaller than when there is only one turn line and they overlap at the third turn.

A winding device for selecting and creeping the two inner and outer turn lines is disclosed in Japanese Patent Application Laid-Open No. 61-2174.
There is one disclosed in Japanese Patent No. 78, in which a synchro cam selects two turn lines, inside and outside, and a creeping cam performs creeping. That is, the structure is such that a cam plate that makes the traverse width of the thread guide variable is swung through a swiveling lever operated by both the synchro cam and the creeping cam. In particular, the conventional synchro cam has a short diameter portion 60A (120″C) and a long diameter portion 6, as shown in FIG.
0B (120°C) and the transition area 60C (60°C) between these
°×2). When the cam roller 33 is located at ■ and ■ on the short diameter portion 60A, the outer turn line is selected, and when the cam roller 33 is located at ■ and ■ on the long diameter portion 60A, the inner turn line is selected. With one rotation of the synchro cam 60, the traverse end is periodically selected from outside → outside → inside → inside. This synchro cam 60 is configured to rotate synchronously with a traverse drum for traverse, and the length of the short diameter portion 60A and the long diameter portion 60B of the synchro cam 60 is equal. On the other hand, the creeping cam has a steplessly variable diameter and is independently driven back and forth, making the rotation angle etc. variable. Therefore, adjustments to prevent the selvage height and improve unwinding performance have been made by changing the creeping ratio and creeping length by changing the rotation angle of the creeping cam.

[Problem to be solved by the invention]

In the conventional yarn winding method described above,
Adjustments to prevent ear height and improve unwinding performance were made by appropriately setting the creeping ratio and creeping length. In other words, in order to prevent ear height, the first
As shown in Figure (b), the creeping ratio of the outer turn line was increased (100%) and the creeping length L was increased.

However, especially when winding synthetic filament, if the reaping length L is set too high, the amplitude of the traverse width (the difference in distance between the inward traverse and the suburban traverse) will become too large, resulting in fluctuations in the winding tension. grow bigger,
For example, when this is used for high torque yarn such as nylon yarn, twill drop phenomenon may occur frequently. The twill drop phenomenon is a phenomenon in which the yarn near the end surface of the package slips off the shoulder of the package and rolls around, and is a phenomenon that is noticeable in high-torque yarns that have many yarns with a circular cross section. Therefore, in order to prevent the twill drop phenomenon, the creeping ratio is reduced to make the package shoulders closer to a right angle (by increasing the flat part of the outer turn &?+A+ in Fig. 10(a)).
The amount of winding at the end of the package increases and the selvage becomes high, making it difficult to unwind the yarn. As described above, the conventional yarn winding method has a problem in that there is a limit to the adjustment that can be made to prevent selvage height and improve unwinding performance. Further, the ribbon winding avoidance by the synchro cam is fixedly set to the fifth overlap, and there is a problem in that there is a limit to the improvement in unwinding performance by ribbon winding avoidance.

The present invention was made in view of the above-mentioned problems of the conventional technology, and its purpose is to improve the unwinding performance, prevent selvage height, and provide a yarn winding with a uniform package end surface. The purpose of this paper is to provide a method and a device for the same.

[Means to solve the problem]

In order to achieve the above object, the yarn winding method of the present invention involves periodically selecting and traversing between the two inner and outer turn lines, in which the ratio of selecting the outer turn line is This is a larger percentage than selecting the inner turn line.

The thread winding device for this purpose is equipped with a synchro cam that has a long diameter part and a short diameter part and rotates according to the traverse speed, and the traverse width of the thread guide is variable according to the positive movement angle of the cam plate. In a yarn winding device that swings the cam plate via a swing lever that comes into contact with the synchro cam, there is one in which the short diameter section of the synchro cam is longer than the long diameter section.

[Effect]

When the rate of selecting the outer turn line becomes larger than the rate of selecting the inner turn line, the periodic selection of the traverse edge is changed from outside → outside → inside → inside → outside → outside → inside (or outside → outside → outside →
The amplitude of the traverse width changes from the inward traverse to the 4-way traverse due to the distance difference between the inward traverse and the 4-outer traverse.
This becomes a distance difference in the outer traverse, and the amplitude difference is halved. Therefore, fluctuations in the winding tension are also reduced, and the degree of freedom in setting the creeping ratio and creeping length is increased. Moreover, if the periodic selection of the traverse ends is from outside to outside to inside, the ends will overlap at the seventh turn, which will also reduce the degree of ribbon winding.

Then, when changing the selection ratio of inside and outside turn lines,
This can be easily changed by making the shorter diameter section of the synchro cam longer than the longer diameter section.

〔Example〕 Hereinafter, the present invention will be described in detail with reference to the drawings.

First, the overall structure and operation of the yarn winding device will be explained with reference to FIGS. 6 to 9. Figure 6 is a sectional view of the thread winding device;
7 is a perspective view of the yarn winding device, FIG. 8 is a view taken along arrow B in FIG. 7, and FIG. 9 is a sectional view taken along the line A--A in FIG. 7.

In FIGS. 8 and 9, reference numeral 1 denotes a traversing drum which is housed in a box 2 together with a guide rod 3. A cam plate 4 is swingably supported inside a lid 6 of the cam box by a shaft 5, and is provided with a cam groove 7 in the longitudinal direction. A traverse guide 10 is swingably supported on the guide rod 3. The traverse guide 1o is a guide block 1 that is swingably fitted to the guide rod 3.
1, a guide arm 13 having two arms 13' and 13' is rotatably supported by a shaft 12, a thread guide 16 is attached to the arm 13', and a cam of the cam plate 4 is attached to the arm 13'. It has a slide piece 15 that swings into the groove 7, and a cam shoe 14 on the lower surface of the guide block 11 that swings into the guide groove A of the lla swing drum I. An arm 13' of the guide arm 13 projects out of the box from a window 9 of a front plate 8 provided between the box 2 and the lid 6. A roller 47 connected to a creeping m structure, which will be described later, is pivotally supported on the end surface of the cam plate 4. Reference numeral 46 denotes a spring that urges the cam plate 4 to pivot in the clockwise direction in FIG.

In the above winding device, when the cam plate 4 swings by the roller 47, the degree of movement of the arm 13' of the traverse guide 10 depends on the amount of swing, that is, the degree of movement of the arm 13' of the traverse guide 10.
The size of roller 4 during traverse is determined.
The mechanism for operating 7 will be explained. In FIGS. 6 and 7, a trapezoidal swinging arm 3° swingably supported by a shaft 31 is connected to an interlocking arm 3 supported by a shaft 39 to one arm 35.
It has 8. The roller 47 comes into contact with one end of this interlocking arm 38. A connecting rod 45 is pivotally supported at the other end of the interlocking arm 38, and the cradle arm 4 is connected via a cam roller 44 at the tip of the connecting rod 45.
It is in contact with a cam disk 43 provided at the base of 0. Cam board 4
The cam surface 43a of 3 is the part 4 near the cradle arm 40.
3b is closer to the support shaft 4 of the cradle arm than the tip 43c.
1, and as the cradle arm 40 rises as the diameter of the package P increases, it acts to push the cam roller 44 and the connecting rod 45 to the right in FIG. The other arm 32 of the two-acting arm 30 has cam rollers 33 and 34 attached to both ends by a shaft 51.
A swing lever 53 having a swing lever 53 is swingably provided, and
The lower end of the arm 32 is formed into an arcuate concave surface 30A having the same curvature as the shaft 54 of the creeping cam 26, which will be described later, so that it comes into surface contact with the shaft 54 of the creeping cam 26, which will be described later. The movement of the swing arm 30 in the clockwise direction in FIG. 6 is restricted. The cam roller 33 and the cam roller 34 are provided so as to be in contact with the synchro cam 20 and the creeping cam 26, respectively. The synchro cam 20 has a long diameter part and a short diameter part, and rotates the traversing drum 1 through a pulley 21, 24, 25, 2.
The creeping cam 26 is rotated by being transmitted through a combination of endless belts 22 and 23 (see FIG. 7).
It has a steplessly variable diameter and is reciprocated by a pulse motor 27 (see Fig. 7).

In the yarn winding device having the above structure, the reciprocating width of the yarn guide 16 of the traverse guide 10 is determined by the movement of the arm 37 of the interlocking arm 38. That is, in FIG. 8, t
When the three-movement arm 30 swings and the arm 37 of the interlocking arm 38 also swings, the cam plate 4 swings about the shaft 5 via the roller 47, and the inclination of the cam groove 7 changes. When the cam plate 4 swings counterclockwise about the shaft 5, the traverse guide 10, in which the slide piece 15 is slidably fitted into the cam groove 7, will move when it is located at the left end of the guide rod. Rotate the arm 13' clockwise around the shaft 12,
Similarly, when it is at the right end, it turns counterclockwise to reduce its traverse width, and when the cam plate 4 moves clockwise, the traverse guide 10 turns its guide arm 13 in the opposite direction to increase its traverse width. do. Further, in FIG. 6, the movement of the interlocking arm 38 is regulated by the movement of a cam disk 43 provided on the synchro cam 20, the creeping cam 26, and the cradle arm 40. Since the package width is gradually narrowed, the following explanation will ignore the movement of the cam disk 43.

Next, the shape and operation of the synchro cam 20, which is the main part of the present invention, will be explained with reference to FIGS. 1 to 3.

In FIG. 1, the synchro cam 20 has a short diameter portion 20A (
160°), a major diameter portion 20B (40″), and a transition portion 20C (80″×2) between these.

Then, when the cam roller 33 is located at ■ and ■ on the short diameter portion 20A, the outer turn line is selected and the cam roller 33
3 is located at ■ on the long diameter portion 20B, the inner turn line is selected, and one rotation of the synchro cam 20 periodically selects the traverse end from outside → outside → inside turn line. . Therefore, the short diameter section 20A of this synchro cam 20 is longer than the long diameter section 20B. And synchro cam 20 and traverse drum 1
The deceleration ratio is selected to be a multiple of 1/3, for example, 1/12 (in the conventional example shown in FIG. There is.

In other words, the second example shows the case where there is no creeping for convenience.
In the figure, the traverse ends of ■ to ■ are periodically selected from outside → outside → inside turn line.

Therefore, since the combination of amplitudes during a traverse is an inner-outer traverse and a suburban traverse, and there is no inner-inner traverse, the difference in distance during a traverse is compared to the combination of an inner-inner traverse and a suburban traverse (see Figure 12). The difference has been halved. When the amplitude difference decreases,
Fluctuations in winding tension are also reduced, and when this is used for high torque systems such as nylon threads, it is possible to prevent the twill drop phenomenon and increase the degree of freedom in setting the creeping ratio and creeping length.

Furthermore, in Figure 2, the thread trajectory between ■■ (1), the thread trajectory between ■■ (2), the thread trajectory between ■■ (3), the thread trajectory between ■■ (4), the thread trajectory between ■■ Thread trajectory (5), Thread trajectory between ■■ (6
) are all different and do not overlap, and it is the 7th turn■■
They will overlap at the thread locus (1) in between. Therefore, 5
Compared to the twelfth illustration in which they overlap in the second turn, the degree of overlap is even smaller.

Next, the interlocking operation of the synchro cam 20 and the creeping cam 26 will be explained with reference to FIG.

FIG. 3 shows the movements of the synchro cam 20 and the creeping cam 26 and the corresponding internal and external turn lines for each of the traverse positions (1) to (2) of the yarn on the package. The synchro cam 20 has a short diameter portion 20A and a long diameter portion 20B and always rotates in a fixed direction, whereas the creeping cam 26 has a short diameter inclined portion 48 and a long diameter inclined portion 49 and reciprocates therebetween. (This can be adjusted by setting the reciprocating rotation angle.) In the turn position ■■ in FIG. The plate 4 is shifted clockwise and oscillated (see FIG. 8) to take an outer turn line with increased traverse width. In addition, the arcuate concave surface 30A
Since the swinging arm 30 is in contact with the support shaft 54 and the swinging of the swinging arm 30 is restricted, the outer turn line is flat. At turn position ■ in FIG. 3, the shaft 51 of the swing lever 53
is in a relatively raised position, the swinging arm 3° arm 32 is raised, and the cam plate 4 is shifted and swung counterclockwise (see Figure 8) to take an inside turn line with a reduced traverse width. . Furthermore, since the long-axis inclined portion 49 of the creeping cam 26 is in contact with the cam roller 34, the inner turn line is bent inward. In turn position (2) in FIG. 3, compared to turn position (2), the longer diameter inclined portion 49 of the creeping cam 26 is in contact with the cam roller 34, so the outer turn line is bent inward. Turn position in Figure 3 ■
, ■ move in the same way as turn positions ■ and ■. By the way, since the amplitude difference is small and the variation in winding tension is small due to the four outer turns or outer and inner turns, the creeping length L should be set longer (that is, the AA section shown in the third figure should be made larger). becomes possible. As a result, it is possible to prevent the selvedge height caused by the inner and outer turn lines being too close together, and to increase the creeping rate of the outer turn lines.

Note that this operation diagram is for convenience, and the traverse speed does not progress as shown in ■ to ■ during the 2.5 round trip traverses, and the traverse speed is actually much faster.

FIGS. 4 and 5 are diagrams showing the shape and operation of other synchro cams.

In FIG. 4, the synchro cam 5 is separated from a short diameter portion 58A, a long diameter portion 58B, and a transition portion 58C between these. Then, when the cam roller 33 is located at ■ to ■ on the short diameter portion 58A, the outer turn line is selected, and when the cam roller 33 is located at ■ on the long diameter portion 58B,
The inner turn line is selected, and the traverse end is periodically selected from outside to outside to outside to inside with one rotation of the synchro cam 58. Therefore, this synchro cam 5
8, the short diameter section 58A section is longer than the long diameter section 58B section. The deceleration ratio of the synchro cam 58 and the traversing drum l is a multiple of 115, for example 1/
10, and is configured to rotate synchronously with the traversing drum 1.

In other words, the fifth example shows the case where there is no creeping for convenience.
In the figure, the traverse ends of ■～■ are outside → outside → outside → outside →
It is a periodic selection within.

Therefore, since the combination of amplitudes during the traverse is an inside/outside traverse and a suburban traverse, and there is no inside/inside traverse, the distance difference during the traverse is 1. As in the figure, the amplitude difference is halved.

〔Effect of the invention〕

Since the present invention is configured as described above, it produces the effects described below.

The ratio of selecting the outer turn line is greater than the ratio of selecting the inner turn line, and the amplitude of the traverse width is halved to reduce fluctuations in the winding tension, increasing the degree of freedom in setting the creeping ratio and creeping length. By increasing the size of the package, it is possible to improve the unwinding property, prevent the height of the edges, and make it possible to make the end surface of the package even. Furthermore, if the periodic selection of the traverse ends is from outside to outside to inside, the degree of overlapping ribbon winding at the seventh turn can be reduced, which further improves unwinding performance.

Then, when changing the selection ratio of inside and outside turn lines,
A simple change can be made by making the short diameter section of the synchro cam longer than the long diameter section and optimizing the speed ratio, so it is possible to minimize design changes, improve unwinding performance, and prevent selvage height. can provide a winding device.

[Brief explanation of drawings]

Fig. 1 is an external view of the synchro cam, Fig. 2 is a view showing its turn line, Fig. 3 is a view showing the operation of the synchro cam and creeping cam, Fig. 4 is an external view of another synchro cam, 5 is a diagram showing the turn line, FIG. 6 is a sectional view of the thread winding device, FIG. 7 is a perspective view of the thread winding device, and FIG. 8 is a sectional view of the thread winding device.
Figure 9 is a cross-sectional view taken along the line A-A in Figure 7.
0 is a diagram showing a conventional turn line, FIG. 11 is an external view of a conventional synchro cam, and FIG. 12 is a diagram showing the turn line. 4...Cam plate, 16...Thread guide, 20.5
8-... Synchro cam, 20A, 58A'' short diameter section, 20B, 58B... long diameter section, 26... Creeping cam, 53... Rocking lever

Claims (2)

[Claims] (1) A yarn winding method that periodically selects and traverses between two inner and outer turn lines, characterized in that the proportion of the outer turn line is selected is greater than the proportion of the inner turn line selected. winding method. (2) The traverse width of the thread guide is made variable according to the swing angle of the cam plate, and a synchro cam that has a long diameter part and a short diameter part and rotates according to the traverse speed is provided, and the oscillator that comes into contact with this synchro cam A yarn winding device that swings the cam plate via a movable lever, characterized in that a short diameter section of the synchro cam is longer than a long diameter section.