JPH03272973A - Winding method of thread - Google Patents

Abstract

PURPOSE:To minimize the influence of a ribbon to the utmost by conducting a disturb during winding of a standard wind number, and increasing the disturb width according to the ratio of a determined wind number increasing together with winding thickening. CONSTITUTION:A traverse cam rotation command signal f3 for controlling traverse jump and disturb is outputted from the output port P3 of a host computer 13 to a control box 16, and an inverter 15 outputs a determined frequency to an induction motor 14 for driving a traverse cam 4 on the basis of the output voltage from the control box 16. During winding of a standard wind number, a disturb by traverse speed change within a determined wind number X 2 is performed, and the disturb width is increased according to the ratio of determined wind number X 2/standard wind number increasing together with winding thickening.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a yarn winding method for preventing ribbons (also referred to as twill) generated during yarn winding.

(Prior art) In the process of winding thread onto a bobbin holder at high speed,
A winding method is adopted in which the winding angle of the thread is within a predetermined range. In this winding method within a predetermined winding angle, when the wind number (the number of revolutions of the bobbin while the thread advances through the winding width) reaches a certain value (an integer is a typical value), the thread being wound passes through the same place. Overlapping ribbons occur. This ribbon can cause vibrations in the touch roller (part of the package gets high due to overlapping yarns and hits the touch roller) or unwinds the yarn (tick-off).
Sometimes, the overlapping threads form a clump and cause problems when pulled out.

As a method of winding yarn to prevent the occurrence of ribbons, the applicant first winds the yarn with a constant number of standard winds, which is a predetermined number of winds away from the dangerous number of winds near the normal wind angle where ribbons are generated. We have proposed a yarn winding method in which a new reference wind number is set and a traverse jump occurs when the minimum wind angle is reached. First, we will explain the ribbon generation conditions and the basic idea for avoiding them, and then we will explain the yarn winding method using this traverse jump.

In FIG. 6, a rectangle 20 represents the development of the bobbin in the circumferential direction, and a trajectory 21 of the thread is shown on this development surface. Here, D is the bobbin diameter, 2XS is the double stroke, W
A is the edge angle, and πDtanWA indicates the distance that the thread travels during one rotation of the bobbin. If the trajectory of the first rotation of the thread is 21a, the trajectory of the second rotation is 21b, and when the thread reaches the upper right corner of the bobbin development surface at trajectory a 2 +, c, it is reversed and becomes a trajectory 21d shown by a dotted line. In FIG. 6, the threads draw trajectories that overlap at the same location, resulting in a so-called ribbon generation state. In order to analyze the occurrence of such a ribbon, a wind number WN is used, which indicates how many times the yarn is folded back during the double stroke 2XS.

There is also. In such a case, X/1 (-round trip), X/
2 (Two round trips LX/3, X/4, X15, X/6...X
/ n exists infinitely. However, as the denominator n of χ/n increases, the degree of overlapping of the threads naturally decreases. Therefore, we will consider up to n-10.

Table 1 shows the number of winds WN (dangerous wind This is a study of decimal numbers (iWNA). (
Margin below) X5 WN= ・・・・・・■π
DtanWA In the case of FIG. 6, WN=8, which means that the bobbin rotates 8 times while the thread advances 2×S. When this WN becomes an integer value χ, i-nobon occurs, but not only when it overlaps in one round trip as shown in Fig. 6, but also when it overlaps every two round trips, three round trips, four round trips, etc. Table 1 In, X/1 is the case where the ribbon is generated in one round trip, and x = 1 to infinity (
The common feature is that the decimal part of the number of winds WN is 0 (the number of winds increases). For X/2 where the ribbon is generated in two reciprocations, l/'2.3/2.5/2.
7/2.9/'2 and the decimal part of the wind number WN are , 5
They have something in common: 2/2.4/2 left blank
．． 6/2.8. /2 is already the dangerous number of winds W N A
The decimal part restored as 0 is left blank as it overlaps with 0. For X/3, where a ribbon is generated in three round trips, the decimal part of 1/3.4/3.7/3 is 333
...and the decimal part of 2/3.5/3.8/3 is , 66
Two types of 66... are restored/restored. In addition, X
The reason why only -1 to .9 is written is that for X-10 or more, X = 1 to 9 are repeated. X/4~χ/
10 was examined in the same way, and a total of 33 decimal values in the rightmost column of Table 1 were restored from all such dangerous wind number decimal values WNA. That is, by calculating the wind number WN in a certain winding state, paying attention to its decimal part, and comparing whether it corresponds to the dangerous wind number decimal value WNA, it is possible to predict ribbon occurrence.

Next, a description will be given of how the traverse cam 4 is controlled using the wind number WN that avoids the dangerous wind number decimal value WNA. The traverse cam rotation speed T is xS, where YS: yarn speed, CWT) is a mechanical constant of the rubber cam.

In addition, the thread diameter is π×B Here, B: bobbin holder rotation speed.

(2) Calculate tanWA from formula 0, calculate YS from formula 0, and substitute each into formula 0, resulting in 'r'-xCWx, 2...■N. Therefore, when the bobbin holder rotation speed B and the wind number WN are known, the traverse cam rotation speed T is determined. That is, since control is possible using the number of winds WN, ribbon generation can be avoided by focusing on the number of winds WN.

Next, the specific procedure of the yarn winding method using traverse jump will be explained. FIG. 7 is a graph diagram showing a winding method that combines winding with a fixed number of standard winds and traverse jump between the normal winding angle WAN having a constant value and the minimum winding angle WAL. First, before starting,
Check whether the intersection of the winding diameter D0 and the normal wire angle VAN corresponds to the dangerous wind number decimal value WNA. The procedure is shown in the flowchart of FIG. Stenoah”
At 30, enter the necessary initial conditions. Note that the critical wind number decimal value WNA is input and stored as an initial condition value that does not require change. In step 31, a wind number WN is calculated from the initial conditions input in step 30. The arithmetic expression is performed using the above-mentioned equation (2). In step 32, it is determined whether or not the decimal part WN' of the wind number WN avoids the dangerous decimal value of the wind number WNA. If the absolute value of (WN'-WNA) is within the predetermined wind number α, in step 33, subtracting the adjusted wind number T from the wind number WN is replaced with a new wind number WN. The determination is made again in step 32, and the process is repeated until the dangerous wind number decimal value WNA is outside the range. In step 34, the first traverse cam rotation speed T1 is calculated from the wind number WN which is outside the dangerous wind number decimal value WNA. The arithmetic expression is performed using the above-mentioned 0 expression. Then, winding with a constant reference wind number WN starts at this initial traverse cam rotation speed Tl (see the line from the start point 35 to the reference wind number winding 36 in Fig. 7).Next, the details of the traverse jump are explained. The procedure will be explained based on the flowchart of FIG. In step 37, the bobbin holder rotation speed B during winding is sequentially read. In step 38, the winding angle WA ear at that time is determined from the bobbin holder rotation speed B read.
Calculate. This arithmetic expression is based on the following formula obtained by substituting D in equation (2) for D in equation (1).

X5XB WN,, XYS In the next step 39, this winding angle WA, -, is the lowest winding angle W
It is determined whether the size has decreased to AL.

As the determination value β, an extremely small value is selected. This minimum wind angle W
Standard wind number WA until AL.

The constant winding continues. When the lowest winding angle WAL is reached, the process proceeds to the next step 40. In step 40, a new number of winds WN after the traverse jump is calculated. This arithmetic expression is based on the following expression obtained by substituting D in the 0th generation into the equation (2).

In step 41, the wind number WN, the decimal part WN of 1
', it is determined whether the dangerous wind number decimal value WNA is avoided. If the absolute value of (WN'-WNA) is within the predetermined wind number α, the wind number WN minus the adjusted wind number T is replaced in step 42 with a new wind number WN0, and the determination is made again in step 41. Then, repeat until the dangerous wind number decimal (!outside WNA) is reached.

As this predetermined wind number α value, for example, WAN=6
．． 5'-WA, 0.0 when L=6.4°. O] is selected. In step 43, the critical wind number decimal value WNA
The next traverse cam rotation speed T7 is calculated from the outside wind number W N n. The arithmetic expression is performed using the above-mentioned 0 expression. Then, at the next traverse cam rotation speed T1, winding of the standard wind number WN- is started, and step 4
Trapper 2 of 4, a jump is performed. This traverse; 7 yambu is repeated many times by comparing and determining the winding diameter D11 and the maximum winding diameter plow □ in step 45.

That is, the winding is completed when the six diameter grooves in which the data update in step 46 is repeated reach the maximum winding diameter D m *X.

The locus of this traverse jump will be explained with reference to FIG. As winding with a constant reference wind number progresses, the winding angle gradually approaches the minimum winding angle WAL, and reaches the minimum winding angle WAL at a point 47. From this point 47, jump to C1) 9 point 48 with a new wind number that avoids the dangerous wind number decimal value. Next, from point 48, winding starts with a new wind number of 649 and a reference wind number-constant. By repeating this, a zigzag trajectory is drawn between the normal winding angle WAN and the R low winding angle WAL. Point after traverse jump (for example, point 4
8) is usually slightly protruding from the Ayakaku WAN.
This is because the shift is made to avoid the dangerous wind number decimal value WNA, and the degree of shift is not uniform.

[Problem B to be Solved by the Invention] In the yarn winding method proposed above, the ribbon generation conditions listed in Table 1, for example, are avoided.

However, there are an infinite number of ribbon generation conditions, not just those restored in Table 1, and it is not realistic to avoid all of these ribbon generation conditions.Therefore, the present invention is based on the previously proposed yarn This is an attempt to further develop the winding method, and its objectives are: 1. It is an object of the present invention to provide a yarn winding method that can reduce the shadow of the ribbon as much as possible.

Means for Solving Problem C8] In order to achieve the above object, the yarn winding method of the present invention includes:
Winding the standard number of wands that is a predetermined number of winds away from the dangerous number of winds near the normal wind angle where the ribbon occurs,
In a yarn winding method that sets a new reference wind number and traverse jumps when the minimum wind angle is reached, the reference wind number (-,) is set as the width of the nail and the traverse stray rt is fluctuated within a predetermined number of winds x 2. Disturbing is carried out, and the power is increased by 2 in accordance with the predetermined number of winds x 2/U of the standard number of winds, in which the force is increased by 11 as the winding becomes thicker.

[Function] If a disc scoop is performed by varying the traverse speed within a predetermined number of winds x 2 during winding according to the standard number of winds, the influence of finer ribbons that could not be avoided by traverse jumps can be dispersed. If the width of the X-tries is increased in accordance with the ratio of predetermined number of widths x 2/reference number of winds, which increases with the thickness of the ribbon, the disturbance period becomes larger and the influence of the ribbon becomes even smaller.

[Example] Examples will be described with reference to the drawings.

FIG. 1 is a block diagram showing the overall configuration of a yarn winding device to which the method of the present invention is applied. Bobbin holder 1 has a bobbin/
2 is installed. This bobbin 2 rotates together with the bobbin boulder 1, and the thread is picked up onto the bobbin 2. On the outer periphery of the bobbin 2, a roller 3 is rotating while abutting on a predetermined surface B. An l-rubber cam 4 is arranged on the opposite side of the touch roller 3.1. The rotation of the traverse cam 4 causes the traverse guide 5 to reciprocate and tighten the thread. This traverse cam 4
The bobbin holder 1 is connected to a spindle motor 7, and is driven by the rotation of the spindle motor 7 according to the output of an inverter 8. A pulse generator 9 for detecting the rotation speed of the touch roller 3 is provided at the shaft end of the touch roller 3.The rotation speed of the touch roller 3 is fed to a control knob 10, and
The spindle motor 7 is controlled to rotate in accordance with the yarn speed. A pulse generator 11 for detecting the rotational speed of the traverse cam 4 is provided at the shaft end of the traverse cam 4, and a pulse generator 12 for detecting the rotational speed of the bobbin holder 1 is provided at the shaft end of the bobbin holder 1. The rotation speed of the traverse cam 4 and the rotation speed of the bobbin holder 1 are input to the input port P1 of the host computer 13 as a traverse cam rotation signal f and a bobbin holder rotation signal f8. A traverse cam rotation command signal f for controlling traverse jump and disturbance from the output boat Ps of the host computer 13 to the control box 16;
is output, and based on the output voltage from the control box 16, the inverter 15 outputs a predetermined frequency to the induction motor 14 that drives the traverse cam 4.

The host computer 13 receives a traverse cam rotation signal r
Processing is performed according to a predetermined program based on the bobbin holder rotation signal f and stored data, and a traverse cam rotation command signal f is output. Further, necessary input data is input to the input port P2 of the host computer 13 using a keyboard or the like.

The inverter 15 performs frequency conversion of 0 to 300 seconds in response to a voltage output of 0 to 10 V from the control box 16, for example, and outputs a predetermined frequency to drive the induction motor 14 at a predetermined rotation speed. However, in order to perform disturbance, the voltage output from the control box 16 is slightly fluctuated, and during the fluctuation, the traverse jump is gradually increased every time. this con)
- An example of the output voltage of the Luposox 16 will be explained with reference to FIG. In Figure 2, ■→■, ■→■, ■→■ indicate traverse jumps, and ■→■, ■→■, ・■−＞3
1! The winding of the standard wind number WN is shown.

In step 8, disturbance is performed during winding of this standard number of winds, but the disturbance width D1. D Z, D
x is not constant but gradually increases. moreover,
The locus of this traverse jump will be explained with reference to FIG. As the winding of the standard number of winds progresses from the start point 35, the winding angle gradually approaches the minimum winding angle WAL, and reaches the minimum winding angle WAL at a point 47. The process jumps from this point 47 to a winding point 48 at a new reference wind number that avoids the dangerous wind number decimal value.

Next, winding of the standard winding number starts from point 48 to point 49 using a new winding number. By repeating this process, a zigzag trajectory is drawn between the normal edge angle WAN and the lowest winding angle WAL. Disturbing is provided throughout the winding of this reference number of winds to disperse any finer ribbon that may be generated by this number of reference winds.

By the way, the disc scoop width D +, D x, D s
will be changed with the new standard number of winds after the traverse jump, but the change must be such that it does not overlap with the number of dangerous winds. Therefore, a method for determining such a disturb width will be explained below. Assuming that winding is performed at a reference wind number that is 0.01 away from the dangerous wind number as a predetermined wind number, a state away from the dangerous wind number can be ensured if the variation is within this predetermined wind number 0.0IX2. In other words, the standard wind number WN
However, it is possible to disturb an amount corresponding to the predetermined number of winds x 2 (2α). In the above-mentioned item 2, since the traverse cam rotational speed T is determined by the bobbin holder rotational speed B and the wind number WN, the disc scoop width TD with respect to the traverse cam rotational speed T can be varied up to N. As a result, it is possible to add a disturbance in which the output voltage of the control box 16 shown in FIG. 1 is varied by 2α/WN.

By the way, since winding is normally performed between the edge angle WAN and the lowest winding angle WAI-, when traverse jumps are repeated, the reference wind number WN becomes smaller as the winding becomes thicker. For example, if the standard wind number WN at the beginning of the winding is 5, the standard wind number WN becomes 2 at the end of the winding. Also, if the predetermined wind number α is 0°01, the disk scoop width at the beginning of winding is 0.01X215=21500 (0.4%), but during the disturb at the end of winding, it is 0.0IX2/2=
1, /1. This means that up to OO (1.0%) is allowed, and the amount of disturbance can be increased along with the winding thickness. Thus, by disturb with a tolerance limit, the effect of the ribbon becomes less. In FIG. 1, when the output frequency of the inverter 15 is varied, it remains constant during the variation, but by varying the output voltage from the control box 16, it can be made to be arbitrary.

Next, the procedure of traverse jump and disk scoop control in the host computer will be explained with reference to the flowcharts of FIGS. 4 and 5. The difference from the flowcharts of FIGS. 8 and 9 described above is that in FIG. 4, after step 34, calculation step 5 of TD during disturbance
0 is added, and in FIG. 5, a step 51 for calculating TDn during disturb is added after step 43. TD1 during the disturbance in FIG. 4 is the traverse cam rotation number in step 34 and the
Calculated by formula. Similarly, TDll during disturbance in FIG. 5 is the traverse cam rotation speed T in step 43. It is calculated by the above-mentioned 2.

In addition, in FIG. 1, the control box 10 that controls the winding speed according to the yarn speed and the control box 16 that controls the traverse jump and day scoop are not separate alarm devices, but are all processed by the host computer 13. You can also do it. Furthermore, the winding device is not limited to a spindle drive type winding device in which the winding speed is accurately controlled by the spindle motor 7 that drives the bobbin holder 1, but also a Frixiland drive type winding device in which a friction roller accurately maintains a constant winding speed. It may be. Further, the normal winding angle WAN and the minimum winding angle WAL are not constant, but may be a function of the winding diameter.

For example, the winding angle at the beginning and end of winding is made approximately equal, and the winding angle is increased in the middle. Changing the helix angle in this manner has the effect of eliminating the so-called bulge phenomenon in which the yarn bulges in the middle of the package.

〔Effect of the invention〕

The yarn winding method of the present invention involves winding a standard number of winds that is a predetermined number of winds away from the dangerous number of winds near the normal wind angle where the ribbon occurs, and when the minimum wind angle is reached, a new standard number of winds is applied. In a yarn winding method that sets a traverse jump by setting the number of winds, a day scoop is performed by varying the traverse speed within a predetermined number of winds x 2 while winding the standard number of winds, and the number of winds increases as the winding thickens x 2/standard. It increases the amount of disturb in proportion to the ratio of the number of winds, and theoretically it is possible to erase the countless small ribbons by disturb, avoid large ribbons by traverse jump, and obtain a pan cage with an excellent winding shape. . Furthermore, the predetermined number of winds that increases as the weight increases x 2
/Reference number of winds is increased according to the ratio of the number of standard winds, and since the amount of disturbance is increased, the influence of the ribbon can be minimized.

[Brief explanation of drawings]

Fig. 1 is an equipment block diagram of a winding device used in the winding method of the present invention, Fig. 2 is a graph showing the output waveform from the control box, and Fig. 3 is a graph showing the winding method of the present invention. Figure 4 is a flowchart showing the winding start procedure, Figure 5 is a flowchart showing the traverse jump and day scoop winding procedure, Figure 6 is a developed view of the bobbin showing ribbon generation, and Figure 7 is a flowchart showing the winding start procedure. FIG. 8 is a flowchart showing a conventional winding start procedure, and FIG. 9 is a flowchart showing a conventional traverse jump winding procedure. WN...wind number, WAN...normal wind angle, WAL
...ilk low wind angle, WN...dangerous wind number, α・
...Predetermined number of winds, T...Traverse cam rotation number,
TD... Disturbing.

Claims (1)

[Claims] (1) Winding is performed using a standard number of winds that is a predetermined number of winds away from the dangerous number of winds near the normal wind angle where the ribbon occurs, and when the minimum wind angle is reached, a new standard wind number is set and a traverse jump is performed. In a yarn winding method, disturbance is performed by traverse speed fluctuation within a predetermined number of winds x 2 during winding of a standard number of winds, and the above-mentioned A yarn winding method characterized by increasing the disturbance width.