JP2005060039A - Ribboning preventive method and ribboning preventive device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a ribboning preventive method capable of more completely preventing ribboning. <P>SOLUTION: The ribboning preventive method comprises a first step (P<SB>-2</SB>-P<SB>-1</SB>) winding by small disturb control with a speed increasing/decreasing ratio W2 smaller than a predetermined speed increasing/decreasing ratio W1 before a winding diameter that makes a large ribboning; a second step (P<SB>-1</SB>-P<SB>+1</SB>) winding by large disturb control by a speed increasing/decreasing ratio W3 larger than the predetermined speed increasing/decreasing ratio W1 immediately before the winding diameter that makes the large ribboning until immediately after passing through the winding diameter; and a third step (P<SB>+1</SB>-P<SB>+2</SB>) winding by small disturb by a speed increasing/decreasing ratio W4 smaller than the predetermined speed increasing/decreasing ratio W1 immediately after passing through the winding diameter that makes the large ribboning. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a ribbon winding prevention method such as an automatic winder and a ribbon winding prevention device.

  In an automatic winder, a spinning bobbin produced by a spinning machine is wound around a package rotating on a traverse drum to form a package having a predetermined yarn amount and shape.

  When the number of rotations of the traverse drum and the package becomes an integral multiple or a fraction of an integer during winding of this package, the traverse cycle and the winding cycle of the package are synchronized, and the wound yarn is the same. As a result, the so-called ribbon winding occurs.

  In a package in which ribbon winding has occurred in this way, ribbon winding yarns are entangled with each other, and when the package yarn is unwound in a later process, the ribbon winding is unwound at once from the package. End up.

  Conventionally, in order to prevent this ribbon winding, as proposed by the present inventor in the following Patent Document 1, the disturbance control is performed, that is, the rotation of the traverse drum is accelerated and decelerated near the ribbon winding generation diameter. Ribbon breakage can be achieved by causing slippage between the drums and dispersing and winding the traverse yarn path.

  That is, even if the winding drum (Dw) traverse drum is accelerated or decelerated at the drum rotation speed (Nd), the package rotates at a substantially constant rotation speed (Np) by its inertial force, so Pw = Dw × Np Ribbon breakage can be performed by changing the number of package winds (Pw) indicated by / Nd.

  By the way, as described above, when disturb control is performed by increasing / decreasing the drum rotation speed in the vicinity of the ribbon winding generation diameter, the number of winds wound around the package changes finely. Actually, fine ribbon winding occurs even at the ribbon generation diameter, and when the package is unwound, the ribbon yarns are entangled with each other to cause latching, resulting in yarn breakage.

Therefore, in Patent Document 2 below, from the beginning of winding of the package to before the winding diameter where a large ribbon can be formed, winding is performed by disturb control with a reduced speed increase / decrease ratio of the traverse drum, and to some extent before the winding diameter where a large ribbon can be formed. Winding is performed without disturb control from before to immediately before, and then wound with disturb control with a large increase / decrease ratio of the traverse drum from just before the winding diameter where a large ribbon is formed until it passes the winding diameter. Proposed.
This makes it possible to rotate at a constant speed without performing disturb control to some extent before a large ribbon is generated, so that the ribbon winding diameter becomes accurate, and by performing large disturb control immediately before that, a large ribbon break is effectively performed. This can be done reliably.
Japanese Examined Patent Publication No. 2-40577 JP 2000-247544 A

  By the way, as in Patent Document 2, even if the disturbance control is performed by changing the speed increase / decrease ratio of the drum rotation speed before the ribbon winding generation diameter, fine ribbon winding occurs in the ribbon winding region, and the package is unwound. It has been found that it is not possible to prevent the yarns from becoming entangled and causing latching during wrinkling.

  As a result of unpacking a large number of packages for this latching, the number of winds in the package is remarkable around 1.5 W where a large ribbon is formed, and the occurrence of latching is observed with fine yarns. There was found.

  Then, the objective of this invention is providing the ribbon winding prevention method and ribbon winding prevention apparatus which solve the said subject and can perform more complete ribbon winding prevention.

In order to achieve the above object, the ribbon winding prevention method according to the first aspect of the present invention includes a disturb control for increasing / decreasing the traverse drum at a predetermined acceleration / deceleration ratio when winding the yarn while rotating the package on the traverse drum. A ribbon winding prevention method for winding while performing,
A first step of winding with a small disturb control with an acceleration / deceleration ratio smaller than the predetermined acceleration / deceleration ratio before the winding diameter where a large ribbon is formed;
A second step of winding with a large disturb control with an acceleration / deceleration ratio larger than the predetermined acceleration / deceleration ratio from immediately before the winding diameter where a large ribbon is formed to immediately after passing through the winding diameter;
And a third step of winding with a small disturbance with an acceleration / deceleration ratio that is smaller than the predetermined acceleration / deceleration ratio immediately after passing through a winding diameter for forming a large ribbon.

  The ribbon winding prevention method according to the second aspect of the present invention is the method according to the first aspect, wherein the winding diameter detects the rotational speed of the traverse drum and the rotational speed of the package, and the diameter of the traverse drum and the rotational speed are detected. It is calculated from the ratio of numbers.

  The ribbon winding prevention method according to the third aspect of the present invention is the method according to the first or second aspect, wherein the traverse groove formed on the traverse drum has a plurality of traverse grooves having different winding numbers, and the traverse drum is arranged in the second step. And the number of winds of the traverse drum is returned in the third step.

The ribbon winding prevention device of the present invention 4 is a ribbon winding prevention device when winding a yarn while rotating a package on a traverse drum,
An inverter device that performs disturb control to increase / decrease the traverse drum at a predetermined acceleration / deceleration ratio;
A package diameter detecting means for detecting the diameter of the package from some extent before the winding diameter where a large ribbon is formed;
A detection value of the package diameter detection means is input, and a first disturb command signal for winding with a small disturb control with an acceleration / deceleration ratio smaller than the predetermined acceleration / deceleration ratio is output to the inverter device before the winding diameter for forming a large ribbon. First control means;
The detection value of the package diameter detection means is input, and then the winding is performed with a large disturb control with an acceleration / deceleration ratio larger than the predetermined acceleration / deceleration ratio from immediately before the winding diameter where a large ribbon is formed to immediately after passing through the winding diameter. Second control means for outputting a 2 disturb signal to the inverter device;
A detection value of the package diameter detecting means is input, and then a second disturb command signal for winding with a small disturbance with an acceleration / deceleration ratio that is smaller than the predetermined acceleration / deceleration ratio immediately after passing through the winding diameter with which a large ribbon is formed is sent to the inverter device. And a third control means for outputting.

  According to a fifth aspect of the present invention, there is provided the apparatus for preventing re-turn winding according to the fourth aspect, wherein the package diameter detecting means comprises: a detecting means for detecting the rotational speed of the traverse drum; a detecting means for detecting the rotational speed of the package; And a calculating means for calculating a winding diameter from the rotation speed ratio.

  A ribbon winding prevention device according to a sixth aspect of the invention is the ribbon winding prevention device according to the fourth or fifth aspect, wherein the yarn is wound while rotating the package on the traverse drum, and the inverter device for controlling the rotation of the traverse drum. The package diameter sensor that detects the diameter of the package from a certain extent before the winding diameter where a large ribbon is formed, and the detection value of the package diameter sensor are input, and from the beginning of winding the package to a certain extent before the winding diameter where a large ribbon can be formed, Disturbance control with a small increase / decrease ratio of the traverse drum is performed. Disturbance control is not performed until just before the winding diameter where a large ribbon is formed, and until the winding diameter where a large ribbon is formed is passed until the traverse drum passes. Outputs a disturb command signal to the inverter so that disturb control with a larger acceleration / deceleration ratio is performed. A ribbon winding prevention apparatus that includes a logic circuit.

  According to the first or third aspect of the invention, by changing the increase / decrease ratio of the disturbance from small to large to small before and after the large ribbon is generated, it overlaps with the traverse position where the large ribbon is generated despite the disturbance. The number of traverses can be reduced as much as possible.

  According to the second or fourth aspect of the present invention, the winding diameter of the package can be accurately detected, and the control switching timing before and after the large ribbon is generated can be accurately performed.

  According to the invention 3 or 5, the position where the large ribbon is generated can be overcome by changing the number of windings of the traverse drum so that the large ribbon is not formed.

  Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

  First, the basic configuration of an automatic winder to which the ribbon winding prevention method and apparatus of the first embodiment of the present invention is applied will be described with reference to FIG.

  The unit body 10 is provided with a traverse drum 11, and a cradle 13 that is rotatable around a shaft 12 is provided behind the unit body 10. The package P is rotatably held by the cradle 13 and rotated in contact with the traverse drum 11, and the yarn Y from the spinning bobbin (see FIG. 6) is guided by the traverse groove 14 of the traverse drum 11 and traversed. However, it is wound around the package P. As shown in FIG. 6, the package P is formed in a cone shape.

  The traverse drum 11 is connected to a drive motor 16 via a transmission device 15 so that the drive motor 16 can be driven by an inverter device 18 so that the number of rotations can be varied.

  The bobbin holder shaft 19 of the cradle 13 is provided with a tachometer (rotation number detecting means) 36 for detecting the rotation number of the package 9. Further, the drive shaft 20 of the traverse dowel 11 is provided with a tachometer (rotation number detecting means) 37 for detecting the rotation speed of the traverse drum 11. As the tachometers 36 and 37, for example, a combination of a gear provided on the rotating body side and a magnetic sensor is used. Outputs from these tachometers 36 and 37 are input to the programmable logic circuit 21. Then, the winding diameter calculation means (package diameter detection means) 31 of the logic circuit 21 calculates the winding diameter at the time of winding.

  The inverter device 18 converts the alternating current from the commercial power supply 22 into a direct current once, and converts the direct current into a variable frequency alternating current power supply by ON / OFF control of the transistor.

  The logic circuit 21 outputs a frequency command signal 23 to the inverter device 18 based on a control program for the rotational speed of the traverse drum 11 from the start to the end of winding of the package P.

The control program of the logic circuit 21 receives the detection value of the package diameter detecting means 31 and is wound in a small disturb control with a small speed increasing / decreasing ratio smaller than the predetermined speed increasing / decreasing ratio before the winding diameter where a large ribbon is formed. First control means 32 for outputting a disturb command signal to the inverter device;
The detection value of the package diameter detecting means 31 is input, and then winding is performed with a large disturb control with an acceleration / deceleration ratio larger than the predetermined acceleration / deceleration ratio from immediately before the winding diameter where a large ribbon is formed to immediately after passing through the winding diameter. Second control means 33 for outputting a second disturb signal to the inverter device;
The inverter device receives a second disturb command signal for winding with a small disturbance with an acceleration / deceleration ratio that is smaller than the predetermined acceleration / deceleration ratio immediately after passing through a winding diameter that allows a large ribbon to be formed after the detection value of the package diameter detecting means 31 is input. And a third control means 34 for outputting to the output.

  2 and 3 show an example in which the logic circuit 21 performs control to increase / decrease the rotational speed of the traverse drum 11 with respect to the package wind number change with respect to the package diameter.

With respect to the ribbon winding of this package, when the winding number of the traverse drum is Dw, the drum diameter is Dd, the winding number of the package is Pw, and the package diameter (winding diameter) is Pd, the following equation (1) is established.
Pw = Dw × Dd / Pd (1)
Further, when the drum rotation speed is Nd and the package rotation speed is Np, the package wind number Pw is expressed by the following equation (2).
Pw = Dw × Np / Nd (2)

  As shown in FIG. 2, the package diameter (Pd) increases and the wind number Pw of the package decreases. When the drum rotational speed (Nd) is increased / decreased, the package P rotates at a substantially constant rotational speed (Np) by its inertial force, so that the package wind number (Pw) shown in the above equation (2) fluctuates. The zigzag ribbon break shown in the figure is performed.

  The procedure for breaking the zigzag ribbon will be described with reference to FIG. FIG. 4 shows a large-diameter side yarn path wound around a package P having a certain diameter. A solid line represents a yarn path 27 wound in the next traverse (traverse swing) with respect to the dotted line thread path 26. If it is wound as shown, traverse end portions 26a and 27a are formed on the large-diameter side by turning back the yarn paths 26 and 27, and the circumferential position thereof is set to “deviation”. In this case, with respect to the traverse end portion 26a, it is possible to analyze the shift for each traverse, assuming that the traverse end portion 27a formed in the next traverse shifts in the rotation direction and is positive, and if the traverse end portion 27a shifts in the reverse direction, it is negative. .

  By performing the disturbance control, the traverse position where the large ribbon is formed is overcome while repeating the change of the traverse position where the traverse end portion repeats the shift in the plus direction and the minus direction alternately.

  In this case, for example, when the drum wind number Dw of the traverse drum 11 is 2.5 W and the drum diameter Dd is 105 mm, the package diameter Pd of 1.5 W (number of package winds) that can form a large ribbon is as described above. From the formula (1), it is 175 mm.

Therefore, in the present invention, as shown in FIG. 3, until the package diameter reaches 169 mm (P ₋₂ ), for example, a standard acceleration / deceleration ratio of ± 1.2% and a period of 0.8 / 0.8 sec Winding is performed by disturb control with a predetermined increase / decrease ratio. In this state, even if the traverse position varies due to disturb control, the traverse position where a large ribbon is formed varies with a margin on the minus side.

Then, the first control means 32 is 169 mm (P ₋₂ ) before the winding diameter (P ₀ ) where a large ribbon is formed, and is smaller than the predetermined speed increasing / decreasing ratio, for example, the speed increasing / decreasing ratio ± 0.8%, First disturb control with a period of 0.8 / 0.8 sec is performed. This small first disturb control is continued until 171 mm (P ₋₁ ) immediately before the package diameter (P ₀ ) where a large ribbon is formed thereafter.
Due to the small first disturbance by the first control means 32, the plus / minus fluctuation range of the traverse position becomes small. For this reason, the traverse position where a large ribbon can be made can be changed while leaving a margin on the negative side.
As described above, the acceleration / deceleration ratio (W2) and the section (P- _{2 to} P- ₁ ) of the small first disturb by the first control means 32 are the traverse positions where the fluctuation of the plus / minus traverse position due to the disturb is large ribbon. It is selected so that it does not apply (does not overlap).

Next, the second predetermined control means 33 increases the standard predetermined increase / decrease from 171 mm (P ₋₁ ) immediately before the package diameter (P ₀ ) where a large ribbon is formed to 177 mm (P ₊₁ ) immediately after passing through the package diameter. Second disturb control that is larger than the speed ratio, for example, an acceleration / deceleration ratio of ± 6% and a period of 1/1 sec is performed.
Since the second disturb has a large acceleration / deceleration ratio, the fluctuation range of plus and minus due to the disturb is large, and the traverse position is widely scattered, but passes through the traverse position where a large ribbon is formed. For this reason, the number of (overlapping) traverses at the traverse position where a large ribbon is formed is small.
Thus, the large second disturb section (P _{−1 to} P ₊₁ ) by the second control means 33 is such that it does not reach the traverse position where a large ribbon can be formed even when the plus / minus fluctuation due to disturb becomes small. Selected.

Next, the third control means 34 is smaller than the standard predetermined acceleration / deceleration ratio from 177 mm (P ₊₁ ) immediately after passing the package diameter (P ₀ ) where a large ribbon is formed to 184 mm (P ₊₂ ) after passing. For example, the third disturb control is performed with an acceleration / deceleration ratio of 0.8% and a cycle of 0.8 / 0.8 sec. The speed increase / decrease ratio of the third disturb control is substantially equal to the speed increase / decrease ratio of the first disturb control.
Since the third disturb control has a small acceleration / deceleration ratio, the fluctuation range of plus / minus due to the disturb becomes small. Therefore, it can be changed with a margin on the plus side with respect to the traverse position where a large ribbon is formed.
Thus, the small third disturbance acceleration / deceleration ratio (W4) and the section (P _{+2 to} P ₊₁ ) by the third control means 34 are such that fluctuations in plus and minus due to disturbance do not reach the traverse position where a large ribbon can be formed. Selected.

Next, after passing through the package diameter (P ₀ ) where a large ribbon is formed, the standard predetermined acceleration / deceleration ratio, for example, the acceleration / deceleration ratio ± 1.2%, and the cycle 0.8, after 184 mm (P ₊₂ ). Winding is performed by disturb control with a standard predetermined speed increase / decrease ratio of /0.8 sec.
In this state, even if the traverse position varies due to disturb control, the traverse position where a large ribbon is formed varies with a margin on the plus side.

  The ribbon winding prevention control of FIG. 3 is programmed in the logic circuit 21 of FIG. 1 by programming a pattern in which the change in the command frequency of the frequency command signal 24 to the inverter device 18 based on the disturb control is a disturb command signal. The control timing is determined based on the diameter of the package P detected by the diameter calculating means 31.

  By the control means 32 to 34 described above, the first step of winding with a small disturb control with an acceleration / deceleration ratio smaller than the predetermined acceleration / deceleration ratio before the winding diameter with which a large ribbon is formed, and then the winding diameter with which a large ribbon is formed A second step of winding with a large disturb control with an acceleration / deceleration ratio larger than the predetermined acceleration / deceleration ratio from immediately before to immediately after passing through the winding diameter, and then the predetermined acceleration / deceleration immediately after passing through the winding diameter that produces a large ribbon. The third step of winding with a small disturbance with an acceleration / deceleration ratio that is smaller than the ratio is executed in order.

  As a result, the number of traverses that overlap the traverse position where the large ribbon is generated can be reduced as much as possible by changing the disturbance from small to large and further small, and a large ribbon break can be effectively and reliably performed. It is possible to take up a more complete package, which is less susceptible to slacking during unraveling.

  The package winding diameter detecting means includes a tachometer (rotation number detecting means) 36 of the traverse drum 11, a package tachometer (rotation number detecting means) 37, the diameter of the traverse drum 11 and the rotation speed. And a calculating means (winding calculating means) 21 for calculating a winding diameter from the ratio of the above. The winding diameter is calculated from the ratio of the diameter of the traverse drum 11 and the rotational speed by detecting the rotational speed of the traverse drum 11 and the rotational speed of the package P. Therefore, the disturbance can be changed precisely before and after the winding diameter where a large ribbon is generated.

  In the above-described embodiment, an example of 0.8% is shown as the first disturb and the third disturb, and 6% of the disturb is shown as the second disturb. It is not limited to this numerical value, and disturb control may be performed while changing the speed increasing / decreasing ratio within a range of several percent as appropriate.

  Although the description has been given mainly with the drum 11 having 2.5 W, it is needless to say that the present invention can be applied to drums having 3 W, 2 W, and 1.5 W.

  Further, as a package winding diameter detection means, a package diameter transmission member that rotates together with the cradle 13 is provided on the shaft 12 of the cradle 13, and the unit body 10 is provided with the package P from the rotational position of the package diameter transmission member. A package diameter sensor that detects a diameter, particularly a diameter from 1.5 wind (1 W) to some extent before the package P may be used.

  Next, the basic configuration of an automatic winder to which the ribbon winding prevention method and apparatus of the second embodiment of the present invention is applied will be described with reference to FIGS. 5 and 6.

  5 differs from FIG. 1 in that a traverse drum 110 is formed with a plurality of traverse grooves having different numbers of winds, and a switching device (changing means) 111 for changing the traverse grooves is provided. The second control means 33 is actuated. Since the other points are the same as those in FIG. 1, the same reference numerals are given and the description thereof is omitted.

  In FIG. 6, the unit body 10 of the automatic winder is a device that rewinds the spinning bobbin 2 around the package P. The spinning bobbin 2 is transported on a machine base (not shown) and arranged at a predetermined position of the unit 10, the yarn end of the spinning bobbin 2 is captured, and the yarn Y is sent upward. On the way, the yarn Y is tensioned by the tension device 4, passes through the yarn defect detection head 5, is traversed by the traverse drum 110, and then sent to the package P. This configuration is the same in FIG.

The traverse drum 110 has a continuous traverse groove 140 formed on the drum surface. The traverse groove 140 includes a traverse forward path 141 that conveys the yarn in the left direction in FIG. 1 and a traverse return path 142 that conveys the thread in the right direction, and the yarn Y traversed leftward in the traverse forward path 141 is traversed. Subsequently, the traverse return path 142 returns to the original position even if traversed in the right direction. The yarn Y traversed in the traverse groove 140 in this way is wound around the package 3 that is surface contact driven by the traverse drum 110.
The traverse drum 110 is formed with two types of continuous traverse grooves 140 having different numbers of winds (hereinafter referred to as W as appropriate) in order to further prevent ribbon winding. One of them is a traverse groove 140 during normal operation in which the traverse forward path 141 and the traverse return path 142 are both 2.5 W. The other is the traverse groove 140 during ribbon winding operation in which the traverse forward path 141 and the traverse return path 142 are both 2 W.

  The traverse groove 140 during the normal operation and the ribbon winding operation described above is branched at a branch portion (not shown), and switching of the traverse groove 140 at the branch portion is performed by a pin cylinder 111 that is a yarn path changing means. The pin cylinder 111 is configured to be switchable between ON and OFF, and in the ON state, the pin cylinder 111 protrudes to a position A in FIG. As a result, the yarn Y performs a normal operation of 2.5 W on both the forward and return paths. Further, in the OFF state, the pin cylinder 111 is retracted, the tension with respect to the yarn Y is released (the yarn path at this time is shown as Y2 in FIG. 6), and the yarn Y is subjected to a ribbon winding operation with a winding number of 2 W. is there.

With the above configuration, the ribbon winding prevention device and the control method thereof according to the present invention will be described.
From the 171 mm (P _-1 ) immediately before the package diameter (P ₀ ) where the large ribbon is formed by the second control means 33 to 177 mm (P + 1) immediately after passing through the package diameter, it is larger than the standard predetermined acceleration / deceleration ratio, For example, the second disturb control with an acceleration / deceleration ratio of ± 6% and a period of 1/1 sec is performed.
At this time, the pin cylinder (changing means) 111 is formed at the time when it becomes 171 mm (P ₋₁ ) immediately before the package diameter (P ₀ ) where a large ribbon is formed, that is, simultaneously with the output of the second disturb signal by the second control means. In addition, the wind state is switched from 2.5 W to 2 W in an OFF state (a state in which a change instruction signal is output). The 1.5 W that makes a large ribbon is changed to 1.20 W, and the degree of ribbon winding when passing through a large ribbon is reduced.
When it becomes 177 mm (P + 1) immediately after passing through the package diameter, that is, simultaneously with the output of the third disturb signal by the third control means, the ON state (return instruction signal is output to the pin cylinder (change means) 111. State) and return the wind number from 2 W to 2.5 W.

  As described above, in the number of winds in which a large ribbon is generated, by changing the number of winds of the traverse drum, it is possible to get over in a state where a large ribbon is not formed.

It is a figure which shows the outline of the ribbon winding prevention apparatus which concerns on 1st Embodiment of this invention. It is a figure which shows the gain control in the package diameter and package wind number in ribbon winding prevention. It is a figure which shows the detail of disturb control. It is a figure which shows the yarn path wound around the package. It is a figure which shows the outline of the ribbon winding prevention apparatus which concerns on 2nd Embodiment of this invention. It is a figure which shows the outline of the ribbon winding prevention apparatus which concerns on 2nd Embodiment of real invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Unit main body 11 Traverse drum 18 Inverter apparatus 21 Logic circuit 31 Winding diameter calculation means (package diameter detection means)
32 First control means 33 Second control means 34 Third control means 36 Tachometer (rotation speed detection means)
37 Tachometer (Rotation speed detection means)
110 Traverse drum 111 Pin cylinder (changing means)
140 Traverse groove P Package

Claims (6)

Ribbon winding prevention method of winding while performing disturb control to increase or decrease the traverse drum at a predetermined speed increase / decrease ratio when winding the yarn while rotating the package on the traverse drum,
A first step of winding with a small disturb control with an acceleration / deceleration ratio smaller than the predetermined acceleration / deceleration ratio before the winding diameter where a large ribbon is formed;
A second step of winding with a large disturb control with an acceleration / deceleration ratio larger than the predetermined acceleration / deceleration ratio from immediately before the winding diameter where a large ribbon is formed to immediately after passing through the winding diameter;
A ribbon winding prevention method comprising: a third step of winding with a small disturbance by an acceleration / deceleration ratio that is smaller than the predetermined acceleration / deceleration ratio immediately after passing through a winding diameter that allows a large ribbon to be formed.   The winding diameter is calculated from a ratio of the diameter of the traverse drum and the rotational speed by detecting the rotational speed of the traverse drum and the rotational speed of the package. The ribbon winding prevention method as described.   The traverse groove formed in the traverse drum has a plurality of traverse grooves with different numbers of winds, the wind number of the traverse drum is changed in the second step, and the traverse drum is changed in the third step. The method for preventing winding of a ribbon according to claim 1 or 2, wherein the number of winds is returned. In the ribbon winding prevention device when winding the yarn while rotating the package on the traverse drum,
An inverter device that performs disturb control to increase / decrease the traverse drum at a predetermined acceleration / deceleration ratio;
A package diameter detecting means for detecting the diameter of the package from some extent before the winding diameter where a large ribbon is formed;
A detection value of the package diameter detection means is input, and a first disturb command signal for winding with a small disturb control with an acceleration / deceleration ratio smaller than the predetermined acceleration / deceleration ratio is output to the inverter device before the winding diameter for forming a large ribbon. First control means;
The detection value of the package diameter detection means is input, and then the winding is performed with a large disturb control with an acceleration / deceleration ratio larger than the predetermined acceleration / deceleration ratio from immediately before the winding diameter where a large ribbon is formed to immediately after passing through the winding diameter. Second control means for outputting a 2 disturb signal to the inverter device;
A detection value of the package diameter detecting means is input, and then a second disturb command signal for winding with a small disturbance with an acceleration / deceleration ratio that is smaller than the predetermined acceleration / deceleration ratio immediately after passing through the winding diameter with which a large ribbon is formed is sent to the inverter device. Ribbon winding prevention device comprising third control means for outputting.   The package diameter detection means calculates the winding diameter from the rotation speed detection means of the traverse drum, the rotation speed detection means of the package, and the ratio of the diameter of the traverse drum and the rotation speed. The ribbon winding prevention device according to claim 4, comprising: means. The traverse drum has a plurality of traverse grooves having different numbers of winds, and includes changing means for changing the traverse grooves,
The second control means outputs a change instruction signal to the changing means simultaneously with the output of the second disturb signal to the inverter device,
6. The ribbon winding prevention according to claim 4, wherein the third control means outputs a return instruction signal for returning the change to the changing means simultaneously with the output of the third disturb signal to the inverter device. apparatus.

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