JPS5934629B2 - How to wind the thread - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for winding a yarn, and more particularly to a method for winding a yarn supplied at a constant speed into a package while traversing and creeping the yarn from side to side using a traverse guide.

In false twisters, take-up machines, etc., yarn fed continuously at a constant speed is generally wound into cheese packages.

The above-mentioned winding is carried out by the package being pressed against the surface of a friction roller rotating at high speed and being driven to rotate, and the yarn being traversed from side to side by the reciprocating movement of a traverse guide within the cam box. In winding the yarn as described above, the traverse guide is usually caused to perform a movement called creeping in order to prevent so-called selvedge height.

In other words, at both the left and right ends of the traverse width, the operation of temporarily shortening the traverse width by several tens of points is repeated at regular intervals to prevent the edges of the package from swelling. Depending on the leaping motion, the ear height could not be completely resolved.
That is, when the creeping operation is conventionally performed repeatedly by drawing a trajectory Ti as shown in FIG. Even if the creeping operation is repeated by drawing a trajectory T2 as shown in Fig. 3 in order to eliminate the crest height that occurs at the two points of force with the end, the creeping trajectory is still unique to the creeping trajectory. Ear height occurred at the location (Figure 4)
It is.

However, the inventor of this invention focused on the above fact, that is, the change in the form of the creeping locus, which causes the force point that generates the edge height on the package to move subtly. We realized that if the loci of the leaping motion were changed for each creeping motion, the ear height formation effects based on each creeping motion would cancel each other out, and as a result of intensive research, we found that They have completed a new winding method that can satisfactorily eliminate this problem.

Embodiments of the present invention will be described below based on the drawings.

First, a winding device for carrying out the method of the present invention will be described with reference to FIGS. 5 to 8. Reference numeral 1 denotes a plurality of cams, the number of which corresponds to a plurality of packages, supported by a cam shaft 2, The angle θ (60 degrees in this embodiment) is the same minimum diameter. An L-shaped arm 4 is swingably supported on the shaft 3, and a cam roller 6 provided at the end of the first arm 4a is pressed against the cam 1 by the urging force of a spring 5. A rod 7 is pivotally supported at the end of the second arm 4b of the L-shaped arm 4.
The other end is connected to one end of a cam plate 9 that is rotatable around a fulcrum U provided within the traverse device 8. Above cam 1
, the L-shaped arm 4, the rod 7, and the cam plate 9 constitute a device S for changing the traverse width. The cam plate 9 is located above the traverse drum 10 and has a groove 11 in the longitudinal direction. A camshaft (not shown) is slidably fitted into the traverse groove 12 to support an L-shaped traverse guide 13, and a sliding piece 14 provided on one arm of the traverse guide 13 is fitted into the groove 10 of the cam plate 9. When fitted, the width of the left and right reciprocating distance is increased or decreased by turning the cam plate 9. 1
The friction roller P 5 is a winding package.

Furthermore, the cam shaft 2 supporting the plurality of cams 1 is driven by a stepping motor 17 as shown in FIG. , to rotate within a predetermined time.

The control device 18 is composed of a calculation device CPU and a pulse generator 20, and a predetermined number of pulses 21 are generated from the pulse generator 20 by a signal generated by calculation by the calculation device CPU based on data input to the calculation device CPU. The signal is emitted to the stepping motor 17.

Since the device of this embodiment is configured as described above, if the stepping motor 17 performs a predetermined rotational movement within a predetermined time according to the number of pulses, the cam 1
rotates, and the L-shaped arm 4 performs a swinging motion to pivot the cam plate 9 around the fulcrum U, thereby increasing or decreasing the traverse width of the traverse guide 13.

That is, creeping is performed, and in this embodiment, according to the present invention, the traverse guide 13
In addition, a characteristic creeping motion as shown in the trajectory T3 shown in FIG. 9 is performed. That is, this case shows an example in which good results were obtained when the creeping rate was 90% and the turning angle at both ends of the traverse groove 12 of the traverse drum 10 was 90 degrees, and the creeping trajectory T3 are four types of patterns T3Pl, T3 as shown in the figure.
It is configured to repeat P2, T3P3, and T3P4 cyclically, and such a creeping trajectory T
The control for performing step 3 is as follows.

That is, for example, when it is desired to obtain the third locus pattern T3P3 shown enlarged in FIG. Assuming that the per rotation angle is 0.3 degrees (that is, 1 rotation with 1200 pulses), the number of pulses to rotate the stepping motor 17 150 degrees, that is, the number of pulses required to rotate the traverse guide from O to 100 on the Y axis in Figure 10. Reaping movement (outward process of creeping)
The number of pulses to be caused is 150 ÷ 0.3 = 500C (out of the remaining 700 pulses, 500 pulses correspond to the return stroke of creeping, and 200 pulses correspond to the maximum width traverse stroke), and in Fig. 10. T3P3 of
-1 interval, 500 x 4/100 in 0.32 seconds
=20 (pulse), 0.32s in the T3P3-2 section
50 during 0.32sec from ec to 0.64sec
0X(20-4)/100=80(pulse), T3P3
-3 section, 500X (5
0-20)/100-150 (pulse), T3P3-4
In the same section, 500X (100
-50)/100=250 (pulses) need to be emitted to the stepping motor 17.

Similarly, in the process of increasing the traverse width, that is, the second half of the creeping operation, 250 pulses are applied in the section T3P3-5;
It is sufficient to emit 150 pulses in the 3P3-6 section, 80 pulses in the T3P3-7 section, and 20 pulses in the T3P3-8 section.

Similarly, if you want to obtain the first trajectory pattern T3Pl shown in FIG. 9, you can uniformly emit 125 pulses throughout each section. It will be clear that a slightly different number of pulses may be emitted than for T3P3.

The transmission of the predetermined number of pulses to draw the predetermined trajectory described above involves the CPU of the arithmetic unit for a set time t1, that is, one creeping operation and one maximum width traversing operation, as shown in FIG. The time required for one cycle, the creeping time Tcl, and the Y-axis value of each section in each creeping locus pattern (Yl, Y2, Y3...Y
6) (For example, the third trajectory pattern T in FIG.
In the case of 3P3, Y1=4, Y2=20, Y3=50,
Y4=50, Y5=20, Y6=4), the arithmetic unit CPU calculates the number of pulses and causes the pulse generator 20 to continuously and repeatedly generate the pulse 21 described above according to a predetermined program. The traverse movement is made by repeatedly drawing the four types of locus patterns shown in FIG. There is.

In other words, when each of the above four types of locus patterns is repeated independently to perform the entire winding process, the positions of the generated selvedge heights on the package cage are separated from each other, and the peaks and troughs of the selvages cancel each other out. The locus patterns are set as follows, and the manner in which the ear height is generated by repeating each locus pattern alone is as shown in FIG. That is, in the trajectory patterns T3Pl, T3P4, T3P2, and T3P3, the force generating force of the ear height is closer to the end of the package, and the peak position of the ear height is skewed. The manner in which the selvage height occurs in FIG. 11 is not an actual measurement value, but is calculated by simulation using a computer, but of course it may also be measured by actually winding the yarn for each pattern.

Therefore, when constructing a creeping motion by repeating an arbitrary number of five or more types of patterns in the same way,
The form of the trajectory pattern described above is also a combination of different forms.

Furthermore, the repetition of the trajectory pattern does not necessarily have to be performed cyclically, and may be performed non-cyclically or completely randomly.

In addition, FIG. 12 shows the creeping locus T in the case of another embodiment.
4 is shown. In this case, the second trajectory pattern T4
Due to the influence of P2, the amount of winding at the extreme end of the package is reduced and there is a possibility of twill falling, so reduce the creeping rate to 80% or less and extend the maximum width traverse section to prevent twill falling. There is. Furthermore, as shown in FIG. 13, the set point (Y
If the set point of the axis value is increased, the speed change of each creeping locus will be smoother, and due to constraints on the capacity of the processing unit CPU and others, and for simplicity, the set point will be limited to only two points. In this case, the creeping locus will be as shown in Fig. 14, but in either case, each creeping locus will be the same as the one shown in Fig. 14. The creeping locus is set such that the positions of the resulting ear heights are separated from each other and the peaks and valleys of the ears cancel each other out. In any case, in the winding method of the present invention, the creeping operation includes at least one point at which the creeping speed changes during the creeping operation other than the turning point of the creeping trajectory; In other words, it is not a simple chevron-shaped creeping trajectory consisting of two straight lines as shown in FIG.

For example, as shown in Figure 2, this includes creeping operations in which the creeping speed changes during the creeping operation (of course, all creeping operations include only such creeping operations in which the creeping speed changes). In addition, the rate of change of the creeping speed in these creeping operations is made to be different for each creeping operation, that is, the form of the creeping locus is changed little by little, and it is made to be different as described above. The respective creeping operations are set so that the positions of the selvedge heights that occur when the yarn is wound by repeating each creeping operation alone are different from each other, so that the winding yarn parts cage is Then, the selvage height forming effects of each creeping operation cancel each other out, that is, the peaks and troughs of the selvage overlap, and both ends of the package become flat. In the above-mentioned embodiments, each creeping locus was made symmetrical with respect to the decreasing and increasing strokes of the traverse width, but the form of this locus may also be asymmetrical, and as described above, By changing the set time to be input, the Y-axis value at the creeping time setting point, etc. for each creeping trajectory pattern, various types of creeping trajectories can be formed, and the quality of the yarn to be wound and the creeping rate can be changed. Or, by setting the optimum creeping locus shape due to the difference in the angle at the turning part of the traverse groove, the generation of selvedge height can be reduced as much as possible, and an excellent package with flat ends can be created. Obtainable.

[Brief explanation of the drawing]

Figures 1 and 3 are diagrams showing the conventional creeping operation, Figures 2 and 4 are schematic diagrams showing the ends of the resulting package, and Figure 5 is a winding device that can carry out the present invention. 6 is a plan view showing the traverse portion, FIG. 7 is a schematic diagram showing the connection between the cam and the stepping motor, and FIG. 8 is a schematic diagram showing the control section of the stepping motor. 9 is a diagram showing the creeping operation according to the present invention, FIG. 10 is an enlarged diagram showing only the third creeping locus in FIG. 9, and FIG. 11 is a diagram showing the creeping operation according to the present invention. Graphs showing the selvage height forming effect for each leaping locus pattern, and Figures 12, 13, and 14 are diagrams showing the creeping operation in other embodiments. P...package, T3, T4...creeping locus.

Claims (1)

[Claims] 1. In a method of winding yarn by creeping the yarn while traversing the yarn from side to side in a rotating package, the creeping operation changes the point at which the creeping speed changes during the creeping operation from decreasing to increasing the traverse width. A change in creeping speed at a change point of the creeping speed in multiple creeping operations during the winding process, including at least one creeping operation other than the turning point in the creeping trajectory that changes to The creeping rate is varied for each creeping operation, and each creeping operation in which the rate of change in the creeping speed is varied is the rate of change that would occur if only those creeping operations were repeated independently. A method for winding yarn, characterized in that the positions of the threads on the package are set in creeping motions that are inconsistent with each other.