JP2003285972A - Winding control monitoring device for yarn winder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem in a conventional yarn winder which determines whether a tension value remains in a certain range from the beginning to the end of winding a package, or recognizes transient tension fluctuations, which has made it impossible to exactly recognize abnormality when the tension value is in the certain range or there are no great local fluctuations. <P>SOLUTION: This winding control monitoring device for a yarn winder TW, which forms packages P1 to P6 by winding yarn around a bobbin 11, stores a relationship between winding time obtained as a result of normal winding operation in an operation pattern determined by a control target value such as yarn winding speed, and a target monitoring value such as tension specific to the operation pattern, as a monitoring reference value in a storage means M installed on the device, compares measured monitoring value obtained after winding operation is performed in an operation pattern in which the monitoring reference value is obtained by a computing device C, with the monitoring reference value, and determines whether a deviation of the measured monitoring value from the monitoring reference value is within a prescribed value. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a winding control and monitoring device of a yarn winding machine which forms a package by winding a yarn on a bobbin.

[0002]

2. Description of the Related Art Conventionally, a yarn winding machine such as a take-up winder has been known, in which a yarn is continuously fed to a bobbin while being traversed and at the same time the bobbin is rotated to wind the yarn. In such a yarn winding machine, in order to obtain a good quality package, the winding operation is controlled so that the winding speed of the yarn is maintained at a constant target value.
Therefore, a means for detecting the winding speed is provided, and whether or not the actual winding speed detected by the detecting means is deviated from the target winding speed is greatly deviated from the target winding speed. In this case, it was decided that some abnormality occurred in the winding process. That is, the winding speed was set as the control target value and was also monitored.

Also, the tension of the wound yarn may show a constant change pattern depending on the winding time unless there is any abnormality in the spinning process upstream of the winding process in the yarn winding machine. Are known. Therefore, in order to wind up a package having higher quality such as winding shape, unwinding property, and transportation stability, the tension of the yarn to be wound is detected and the abnormality in the winding process is grasped by the detected tension. Things are also being done. For example, as shown in FIG. 5B, when the winding speed is kept constant and the winding operation is performed, the tension value is within a certain constant range R as shown by the solid line in FIG. 5A. Therefore, it is determined whether or not the detected tension value is outside the range R from the start of winding the package to the time when the package is fully wound, and the process abnormality is grasped. Further, as shown in FIG. 6B, recently, in order to obtain the best package, it is possible to control the winding speed and the traverse speed of the yarn to be changed so as to change in a pattern during winding. In this case, as shown by the solid line in FIG. 6A, the tension also changes according to the winding speed and the like. Therefore, in this case, the transient tension fluctuation is recognized by detecting the degree of change between the tension value at a certain time point and the tension value immediately before, and when the tension fluctuation becomes large like ΔTb. It is possible to determine that there is an abnormality.

[0004]

However, as shown in FIG. 5, it was judged that there was no abnormality if the tension value was within a certain range from the start of winding of the package to the full winding. Then, for example, although the detected tension value is within a certain range as in the change in tension value shown by the dotted line in FIG. 5A, the tension value indicated by the solid line is large at the winding time D. Even if a change pattern having a value difference ΔTa is shown, it is determined that there is no abnormality. Further, in the case where the transient tension fluctuation is recognized, as shown by a dotted line in FIG. 6A, when a large fluctuation is not locally observed, the tension change pattern (solid line However, there is a problem that the abnormality cannot be recognized even if it is largely deviated from the pattern shown by.

[0005]

The problem to be solved by the present invention is as described above, and the means for solving this problem will be described below.

That is, according to the first aspect of the present invention, there is provided a winding control monitoring device of a yarn winding machine which forms a package by winding a yarn on a bobbin, and an operation pattern determined by a certain control target value. The relationship between the winding time and the target monitoring value specific to the operation pattern obtained as a result of performing the normal winding operation is stored in the storage means provided in the device as the monitoring reference value, and the monitoring reference is calculated by the calculating means. It compares whether the actual measurement monitoring value and the monitoring reference value obtained when the winding operation is executed in the operation pattern having the value is compared, and whether the deviation of the actual measurement monitoring value from the monitoring reference value is a predetermined value or more. Make a decision.

In the second aspect, the yarn winding machine is
A tension detecting means for detecting the tension of the wound yarn and a winding speed detecting means for detecting the winding speed of the yarn are provided, and the control target value and the monitoring value are the winding speed value and the tension value of the yarn, or the yarn. Is the tension value and the winding speed value.

In the third aspect, the monitoring reference value is
It is obtained from the actual monitoring value during the winding operation performed a plurality of times before the winding operation.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Next, embodiments of the present invention will be described. 1 is an overall front view of a yarn winding machine equipped with a winding control and monitoring device of the present invention, and FIG. 2 is a block diagram showing the yarn winding machine.
FIG. 3 is a diagram showing the relationship between the winding time and the rotation speed and tension of the contact roller when the rotation speed of the contact roller is the control target value and the tension is the monitoring target. FIG. 4 shows the tension as the control target value. FIG. 5 is a diagram showing the relationship between the winding time and the rotation speed and tension of the contact roller when the rotation speed of the contact roller is monitored, and FIG. 5 shows a conventional yarn winding machine.
FIG. 6 is a diagram showing the relationship between the package diameter and the tension when the contact roller is held at a constant rotation speed, and FIG. 6 shows the contact roller rotation speed in a certain pattern in a conventional yarn winding machine. It is a figure which shows the relationship between a package diameter and tension at the time of driving by driving.

The structure of a take-up winder as a yarn winding machine equipped with the winding control and monitoring device of the present invention will be described. As shown in FIG. 1, a plurality of (six in the figure) filament yarns (hereinafter referred to as yarns) supplied from a spinning head (not shown) pass through a pair of godet rollers 2 and 3 and then to a fixed frame 5. A tension sensor S that is inserted into each of the traverse fulcrum guides 6 provided on the
It passes through 1 to S6 and is sent to the take-up winder TW.

The take-up winder TW has two spindles 7 and 8 respectively located at the winding position and the standby position. A plurality of (six in the figure) bobbins (paper cylinders) 11 (shown in FIG. 2) are mounted on the spindle 7, and a thread is wound on each bobbin 11. The bobbins 11 on which the thread layer is formed are called packages Pl to P6. When the yarn layers of the packages Pl to P6 reach the specified amount and become fully wound, the spindle 7 at the winding position and the spindle 8 at the standby position are exchanged, and the yarn is wound on the empty bobbin of the spindle 8.
In the vicinity of the yarn layer peripheral surface of the packages Pl to P6, a contact roller 9 is provided for applying an appropriate contact pressure to the yarn layer peripheral surface. In this way, the spindle 7 and the bobbin 1
The winding mechanism is configured with 1 as a basic element.

A traverse device 10 for traversing the yarn (shaking the yarn within a predetermined width of the bobbin 11) is provided above the spindle 7. Further above the traverse device 10, there are provided a fulcrum guide 6 that serves as a traverse fulcrum of the yarn, and tension sensors Sl to S6 composed of strain gauges and the like. In this way, the traverse mechanism is configured with the traverse device 10 as a basic element.

As shown in FIG. 2, the spindles 7 and 8 are
First and second spindle motors MSP1 and MSP respectively
2 are driven to rotate, and the rotation speeds of the spindles 7 and 8 are respectively the first and second spindle sensors SSP1 and SSP.
It is detected at SP2. The traverse of the yarn is performed by rotationally driving the traverse cam 4 by the traverse motor MTR, and the traverse frequency is detected by the traverse sensor STR. Further, the rotation speed of the contact roller 9 which rotates in contact with the spindle 7 is detected by the contact roller sensor SCR.

Each sensor SSP1, SSP2, STR, S
The detection signals of CR and S1 to S6 are input to the arithmetic unit C, and the drive rotation speeds of the motors MSP1, MSP2, and MTR are controlled by the inverter INV. Further, the tension of the yarn is calculated by the arithmetic unit based on the detection signals from the tension sensors Sl to S6.

As described above, the spindles 7 and 8 and the traverse cam 4 are rotationally driven by the first and second spindle motors MSP1 and MSP2 and the traverse motor MTR under the control of the inverter INV, respectively. Package P1 with high quality such as reliability and transportation stability
To obtain P6 to P6, control is performed such that the rotation speed of the contact roller 9 (that is, the winding speed of the yarn) that is in pressure contact with the package changes in a certain pattern between the winding start and the winding end of the packages P1 to P6. Has been done. Further, when the same yarn is wound with the same traverse speed pattern and the same winding speed pattern, the detected change in tension is a constant pattern.

Therefore, when winding is performed while changing the winding speed of the yarn wound on the packages P1 to P6 in a predetermined traverse speed pattern in a pattern along a certain target value, the take-up winder is used. If there is no abnormality in the spinning process or the like on the upstream side of the TW, the yarn tension detected by the tension sensors Sl to S6 will show a constant change pattern depending on the winding time. vice versa,
When winding the packages P1 to P6 while controlling the tension of the yarn to be wound in a predetermined traverse speed pattern so as to change in a pattern according to a certain target value, the winding speed is the winding time. Will show a constant change pattern depending on.

In view of this, in the present invention, one of the winding speed of the yarn and the tension of the yarn is controlled so that it changes in a pattern along a certain target value, and the winding operation is performed while the winding operation is detected. By observing the other detection values of the winding speed and the tension of the yarn, the determination is made as to whether or not an abnormality has occurred in the packages P1 to P6.

Specifically, as a first example, first, before winding the actual product package, a speed pattern along a preset rotation target value is set from the start of winding to full winding. Then, the spindles 7 and (8) at the winding position are rotationally driven so that the contact roller 9 rotates, and the packages P1 to P6 are wound normally as the target. In this case, the rotation speed of the contact roller 9 detected by the contact roller sensor SCR is input to the arithmetic unit C, and the first / (second)
It is fed back to the inverter INV that controls the spindle motors MSP1 and (MSP2).

The storage unit M provided in the arithmetic unit C of the apparatus stores the relationship between the winding time and the winding tension of the yarn, which is obtained based on the tension signal detected during the normal target winding operation.
Remember. For example, when the winding operation is performed along the rotation speed pattern NP1 of the contact roller 9 as shown in FIG. 3B, the tension pattern as shown by the solid line in FIG. Relationship) TP1 is obtained, and the storage unit M
Memorized in.

During the subsequent winding operation, while the winding is performed according to the rotation speed pattern NP1 shown in FIG. 3B, the tension of the yarn detected by the tension sensors Sl to S6 in the arithmetic unit C and the tension pattern. TP1 is compared as needed to calculate the degree of deviation of the detected tension from the tension pattern TP1. Tension pattern TP of detected tension
The deviation from 1 is, for example, the upper limit tension pattern TPU set to a value higher than the tension pattern TP1 by a predetermined value.
And within the range between the lower limit tension pattern TPL set to a value lower than the tension pattern TP1 by a predetermined value, it is determined that no abnormality has occurred in the arithmetic unit C,
If it is out of this range, it is determined that an abnormality has occurred.
For example, when the detected tension shows a value larger than the upper limit tension pattern TPU at the winding time Pd as in the tension pattern TP1 ′ shown in FIG.
It is determined that an abnormality has occurred.

That is, the packages P1 to P are arranged so that the contact roller 9 has a pattern rotation speed along a certain target value.
6 is rotationally driven, and in order to determine whether or not the winding operation is normally performed, the tension value T of the detected yarn tension value is used as a monitoring reference value obtained in advance.
It is used as an actual monitoring value to be compared with P1.

As described above, when the winding operation is performed depending on the rotation speed pattern NP1, the tension pattern T which is uniquely determined with respect to the rotation speed pattern NP1 which is the target value.
P1 is obtained in advance, the tension detected during the winding operation is monitored, and the degree of deviation of the detected tension at each winding time from the tension pattern as the monitoring reference value is determined.
Even when the detected tension value is within a fixed range such as between the maximum value and the minimum value of the tension pattern TP1 or when there is no large local variation, the abnormality can be accurately and accurately determined.

Tension pattern TP used as a monitoring reference value
In this example, since the value obtained during one winding operation performed before the actual winding of the product package is adopted, the tension pattern TP1 can be easily grasped and monitored. The reference value can be easily set. Also,
The tension pattern TP1 may employ statistical values of a plurality of values, such as an average value of values obtained in a plurality of winding operations before performing a certain winding operation. In this case, it is possible to monitor the tension with higher accuracy as compared with the case where the tension pattern TP1 having the value obtained in one winding operation is used as the monitoring reference value. It is possible to further improve the quality of P6.

Next, as a second example, contrary to the first example described above, the packages P1 to P6 are wound while controlling the tension of the wound yarn to change in a constant pattern. Meanwhile, a case where the degree of deviation of the rotation speed of the contact roller 9 as the monitoring value from the monitoring reference value is determined will be described.

Specifically, first, before winding the actual product package, the tension of the yarn to be wound keeps the tension of the pattern along a certain target value from the start of winding to full winding. Spindle 7 · (8) at the winding position so that
Is normally driven to wind the normal packages P1 to P6.

During this normal winding operation, the contact roller 9
Of the contact roller sensor SCR
The relationship between the winding time and the contact roller rotation speed, which is detected based on the detected rotation speed signal, is stored in the storage unit M provided in the arithmetic unit C of the apparatus. For example, the tension pattern TP as shown in FIG.
When the winding operation is performed in accordance with No. 2, the rotation speed pattern (the winding time and the contact roller 9) shown by the solid line in FIG.
(Relationship with the rotation speed of NP) is obtained and stored in the storage unit M.

In the subsequent winding operation, while rotating according to the tension pattern TP2 shown in FIG. 4A, the arithmetic unit C rotates the contact roller 9 detected by the contact roller sensor SCR, Speed pattern NP2
And are compared at any time, and the degree of deviation of the detected rotation speed from the rotation speed pattern NP2 is calculated. The deviation of the detected rotation speed from the rotation speed pattern NP2 is, for example, an upper limit rotation speed pattern NPU set to a value higher than the rotation speed pattern NP2 by a predetermined value, and lower than the rotation speed pattern NP2 by a predetermined value. If it falls within the range between the lower limit rotation speed pattern NPL set to the value and the arithmetic unit C determines that no abnormality has occurred, and if it falls outside this range, it is determined that an abnormality has occurred. For example, when the detected rotation speed is the winding time Pe as shown in the rotation speed pattern NP2 ′ shown in FIG.
When the value is smaller than the lower limit rotation speed pattern NPL, it is determined that an abnormality has occurred.

That is, the packages P1 to P are so arranged that the yarn to be wound has a tension of a pattern along a certain target value.
6 is rotated, and the detected contact roller 9 is used to determine whether or not the winding operation is normally performed.
The rotational speed (i.e., the winding speed of the yarn) is used as an actual monitoring value for comparing with the rotational speed pattern NP as a monitoring reference value that is obtained in advance.

As described above, when the winding operation is performed depending on the tension pattern TP2, the rotational speed pattern NP2 that is uniquely determined with respect to the target tension pattern TP2.
Is calculated in advance, and the rotation speed of the contact roller 9 detected during the winding operation is monitored to determine the degree of deviation of the detected rotation speed at each winding time from the rotation speed pattern NP2 as the monitoring reference value. Thus, even when the detected rotation speed value is within a certain range such as between the maximum value and the minimum value of the rotation speed pattern NP2 or when there is no large local variation, the abnormality is accurately and accurately determined. be able to.

As described above, one of the winding speed of the yarn and the tension of the wound yarn is used as the control target value when performing the winding operation, and the winding speed of the yarn and the wound yarn are used as the monitoring values. The other tension is used. Therefore, when the control target values of the take-up rotation speed itself and the tension itself are monitored and the control target and the monitor target are the same, for example, when the take-up rotation speed is the control target and the monitor target. Even if an abnormality occurs in the physical properties such as the elastic modulus of the wound yarn, it is difficult to catch the change if the device itself does not change, but the control target value and the monitoring target are set to the winding speed. If different parameters such as the thread tension and the thread tension are used, even if there is an abnormality in the physical properties such as the elastic modulus of the wound thread, the change can be captured, so highly accurate determination can be performed. It is possible.

The "rotation speed of the spindle at the winding position" may be used as the "winding speed". Further, the “package diameter” may be used instead of the “winding time”. Further, the "traverse speed" can be used as the control target value. In the operation in this case, for example, the traverse speed is changed and the traverse speed is changed to perform winding, or the traverse speed is changed and the winding is performed while changing the winding speed.

[0032]

Since the present invention is constructed as described above,
The following effects are achieved.

That is, as described in claim 1, there is provided a winding control monitoring device for a yarn winding machine which forms a package by winding a yarn on a bobbin, and has an operation pattern determined by a certain control target value. The relationship between the winding time and the target monitoring value peculiar to the operation pattern obtained as a result of normal winding operation is stored in the storage means provided in the device as a monitoring reference value, and is monitored by the computing means. Whether the actual measurement monitoring value obtained when the winding operation is executed with the operation pattern having the reference value and the monitoring reference value are compared, and whether the deviation of the actual measurement monitoring value from the monitoring reference value is a predetermined value or more. Since the detection monitoring value is within a certain range such as between the maximum value and the minimum value of the monitoring reference value pattern, or when there is no large local variation, the detection monitoring value can be accurately and accurately detected. You can judge.

According to a second aspect of the present invention, the yarn winding machine is
A tension detecting means for detecting the tension of the wound yarn and a winding speed detecting means for detecting the winding speed of the yarn are provided, and the control target value and the monitoring value are the winding speed value and the tension value of the yarn, or the yarn. Since the tension value and the winding speed value of the control target value are the winding speed itself and the tension itself, and the control target and the monitoring target are the same, for example, the winding speed is controlled. When the target and monitoring target are used, even if an abnormality occurs in the physical properties such as the elastic modulus of the wound yarn, it is difficult to capture the change if there is no change in the device itself. If the monitoring target is set to different parameters such as the winding speed and the tension of the yarn, even if the physical properties such as the elastic modulus of the wound yarn are abnormal,
Since the change can be captured, highly accurate determination can be performed.

As described in claim 3, the monitoring reference value is
Since it is obtained from the actual measurement monitoring value during multiple winding operations performed before the winding operation, compared to the case where the tension pattern of the value obtained in one winding operation is used as the monitoring reference value. Thus, it becomes possible to monitor the tension with higher accuracy, and it is possible to further improve the quality of the package.

[Brief description of drawings]

FIG. 1 is an overall front view of a yarn winding machine including a winding control monitoring device of the present invention.

FIG. 2 is a block diagram showing a yarn winding machine.

FIG. 3 is a diagram showing the relationship between the winding time and the rotation speed and tension of the contact roller when the rotation speed of the contact roller is set as a control target value and the tension is monitored.

FIG. 4 is a diagram showing the relationship between the winding time and the rotation speed and tension of the contact roller when the tension is set as a control target value and the rotation speed of the contact roller is monitored.

FIG. 5 is a diagram showing the relationship between the package diameter and the tension when the conventional yarn winding machine is operated while keeping the rotation speed of the contact roller constant.

FIG. 6 is a diagram showing the relationship between the package diameter and the tension when the conventional yarn winding machine is operated by changing the rotation speed of the contact roller in a certain pattern.

[Explanation of symbols]

TW take-up winder C arithmetic unit INV inverter SCR contact roller sensor P1-P6 package S1 to S6 tension sensor 7.8 spindle 9 Contact roller 11 bobbins

Claims (3)

[Claims] 1. A winding control monitoring device for a yarn winding machine that forms a package by winding a yarn on a bobbin, and performs a normal winding operation in an operation pattern determined by a certain control target value. The relationship between the winding time and the target monitoring value specific to the operation pattern obtained as a result of the operation is stored in the storage means provided in the device as the monitoring reference value, and the operation pattern for which the monitoring reference value is obtained by the computing means It is characterized in that the actual measurement monitoring value and the monitoring reference value obtained when the winding operation is executed are compared with each other, and whether or not the deviation of the actual measurement monitoring value from the monitoring reference value is a predetermined value or more. A winding control monitoring device for a yarn winding machine. 2. The yarn winding machine comprises a tension detecting means for detecting a tension of a wound yarn and a winding speed detecting means for detecting a winding speed of the yarn, and the control target value and the monitored value are The winding control value monitoring device of the yarn winding machine according to claim 1, wherein the winding speed value and the yarn tension value are the yarn tension value or the yarn tension value and the winding speed value. 3. The yarn according to claim 1, wherein the monitoring reference value is obtained by an actual measurement monitoring value during a plurality of winding operations performed before the winding operation. A winding control and monitoring device for a strip winding machine.