JPH0995827A - Winding of yarn and winder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain uniform packages over whole spindles regardless of dispersion of characteristics of each induction motor, etc., when plural winders which drive together with spindles and roller bails are put side by side and simultaneously operated. SOLUTION: In winding yarn round packages 8a and 8b formed on bobbins 7a and 7b attached to spindles 6a and 6b driven by motors while bringing a roller bails 9a and 9b into contact with these packages under pressure, plural winding systems due to spindle and roller bails are simultaneously operated and motors 10a and 10b for driving each spindle are individually controlled that peripheral speed of each roller bail becomes a definite value and command signal of rotating rate to a motor for driving each roller bail is individually set that the peripheral speed of each package become substantially a definite value.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a yarn winding method and winding device of a type in which a roller bale is driven together with a spindle, and in particular, when a plurality of weights are simultaneously wound, a uniform package can be obtained for each weight. And a winding device for the wound yarn.

[0002]

2. Description of the Related Art Generally, in a spindle drive type yarn winding device, a roller bale is provided so as to be in contact with a winding layer (package) formed on a bobbin mounted on a spindle. The shape is adjusted so that the package does not collapse. This roller bale is moved in the outer diameter direction as the package grows (thickness of winding), and usually detects the number of revolutions (peripheral speed) of the roller bale and keeps the spindle rotation drive source constant. (Motor) is controlled.

Various yarn winding devices having such a roller bale have been proposed, and various devices in which the roller bale itself is also driven by a motor have been proposed (for example, Japanese Patent Publication No. 3-67941). .

[0004]

However, when a plurality of yarn winding devices in which the roller bale is also driven by a motor are arranged side by side and the winding of a plurality of yarns is attempted at the same time, the following occurs. There is a problem.

Induction motors are usually used for spindle drive and roller bale drive. The slip ratio of each induction motor and the mechanical loss of each drive system (mechanical loss).
Even if the weights are set to exactly the same conditions, the winding conditions such as the tension of the yarn generated during winding and the relaxation of the yarn between the roller bale and the package are different. Conditions such as rate will be slightly different.

Especially, since the induction motor is used,
Even if the same rotation speed command is set for each roller bale, the actual roller bale speed (peripheral speed) may be different even if the slip ratios of the individual motors differ. The same thing happens with the spindle. Therefore, it is extremely difficult to create the same relaxed state for a plurality of series between the roller bale and the package.

Further, the induction motor has a problem that the slip ratio changes with time during operation, and in a drive system including the induction motor, mechanical loss changes with time (generally, Is decreasing over time).

Therefore, if a plurality of conventional roller bale drive type winding devices are simply installed in parallel and operated simultaneously,
The winding conditions vary among individual winding systems, and the winding conditions change with time even during the winding operation.

Such variations and changes in the winding conditions are
Variations in the yarn quality such as the bulge rate of the package, the strength of the wound yarn, and the elongation are caused, which makes it difficult to obtain a uniform and high-quality yarn quality package.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a plurality of yarn winding devices of the type that drive both a spindle and a roller bale in parallel, and to simultaneously operate them, in spite of variations in characteristics of each drive induction motor and the like. The aim is to obtain the desired uniform package over the entire weight.

[0011]

In order to solve this problem, a yarn winding method according to the present invention is applied to a package formed on a bobbin mounted on a motor-driven spindle.
When winding a yarn while applying pressure to the motor driven roller bale, multiple winding systems consisting of the spindle and the roller bale are operated simultaneously to drive each spindle so that the peripheral speed of each roller bale becomes a constant value. The method is characterized in that the motors are individually controlled, and the rotation speed command signals to the roller bale driving motors are individually set so that the peripheral speeds of the packages are substantially constant.

In such a winding method, each spindle drive motor is individually controlled so that the actual peripheral speed of each roller bale in each series (that is, the actually measured peripheral speed) becomes a constant value. Controlled. Immediately after passing the roller bale, the speed of the yarn wound as a package, that is, the actual peripheral speed of the package is set to be slower than the actual peripheral speed of the roller bale, and as a result, it is wound as a package. Relaxing is applied to the thread that is going on. Therefore, in reality, with respect to the package which is rotationally driven, the roller bale that is in contact with the package acts on the brake side. The package peripheral speed is
For each series of packages, the rotation speed command signals to the motors for driving the roller bale are individually set so that they are substantially constant, so that the above-mentioned relaxed state (relaxation rate) is approximately constant for each weight. Are aligned with. By making the relaxation rate constant for each weight, a uniform package of desired yarn quality can be obtained.

Whether or not the relaxed state between the roller bale and the package is substantially the same is confirmed by comparing the yarn qualities such as strength and elongation of the obtained packages. Although the method is preferable, this method is a little inefficient because it involves trial and error of actually performing winding and inspecting the package.

In order to improve this, it is preferable to monitor the tension of the yarn on the upstream side of the roller bale, which has a corresponding relationship with the relaxation rate.

That is, the tension of the running yarn is detected on the upstream side of the roller bale as seen in the running direction of each yarn,
It is preferable to individually control the rotation speed command signals to the respective roller bale driving motors so that the detected tension has a substantially constant value.

Further, as described above, the winding condition also changes with time. For example, at the beginning of winding, the rolling resistance (mechanical loss) of the roller bale and the spindle is relatively large due to lubrication and the like, but the resistance becomes smaller over time. Therefore, even with the same yarn, the relaxed state between the roller bale and the package changes from the start of winding until the rotation resistance reaches a constant value.

To deal with this, during winding of the yarn,
It suffices that the individual setting of the rotation speed command signal for each roller bale drive motor can be varied. For example, if the yarn tension on the upstream side of the roller bale is detected and the detected value can be fed back momentarily, it is possible to sufficiently follow the change with time. By doing so, it is possible to wind the entire weight under the target uniform condition from the beginning to the end of winding.

The yarn winding device according to the present invention for carrying out the winding method as described above includes a motor-driven roller bale in a package formed on a bobbin mounted on a motor-driven spindle. It is a device that winds a yarn while applying pressure, and a winding system consisting of a spindle and a roller bale is installed side by side so that multiple series can be operated simultaneously, and the peripheral speed of each roller bale becomes a constant value. As described above, it has means for individually controlling the spindle driving motor and means for individually setting the rotation speed command signal to the roller bale driving motor so that the peripheral speed of the package becomes a substantially constant value. It is characterized by being present.

In the above device, the yarn tension detecting means is provided on the upstream side of the roller bale as viewed in the running direction of each yarn, and each tension detecting means feeds back the detected tension to correspond to each of the above-mentioned respective tensions. It is preferably connected to a means for individually setting a rotation speed command signal to the roller bale driving motor.

In the above apparatus, the spindle driving motor and the roller bale driving motor are induction motors, and each induction motor is drive-controlled via an inverter.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a yarn winding device according to an embodiment of the present invention, in which two out of a large number of winding lines arranged in parallel so as to be simultaneously operable are taken out and illustrated.

In the figure, Y indicates a yarn sent from a spinning means (not shown) or the like, and each yarn Y passes through the first-stage Goddie roller 1 and the second-stage Goddie roller 2, It is sent to each winding machine 3a, 3b. In this embodiment, tensiometers 4a and 4b for detecting the tension of the running yarn Y are provided immediately before the winding machines 3a and 3b.

Each winding machine 3a, 3b has an induction motor (M
_s ) Spindle 6 driven to rotate by 5a, 5b
a and 6b are provided. The spindle may be of a turret type that can swing between a winding position and a standby position. Bobbins 7a and 7b are mounted on the spindles 6a and 6b, and the yarn Y is wound on the bobbins 7a and 7b as packages 8a and 8b having a predetermined shape. Roller balers 9a and 9b arranged parallel to the spindles 6a and 6b are brought into contact with the packages 8a and 8b, so that the packages 8a and 8b do not collapse and are formed into a package having a predetermined shape. Is to be done. The roller veils 9a and 9b are formed by suitable means (not shown).
The contact pressure is controlled by the
As the packages 8a and 8b grow, they are moved in the package outer diameter direction by an appropriate means (not shown). The roller veils 9a and 9b are rotationally driven by induction motors (M _R ) 10a and 10b.

The spindle driving motors 5a and 5b are controlled as follows. The peripheral speed (or rotation speed) of the roller veils 9a and 9b is detected by the rotation speed detection pickups 11a and 11b that are arranged to face the roller veils 9a and 9b or that are connected to the rotation shafts of the roller veils 9a and 9b. , The detection signal is the controller (CONT) 1
2a, 12b. Controller 12a, 12b
Then, the speeds set by the setting devices 13a and 13b are compared with the detection signals from the pickups 11a and 11b, and the inverter (INV) 14a,
Each motor 5a, 5b is controlled via 14b, whereby the peripheral speed of each roller bale 9a, 9b is set by the setter 13.
It is controlled so as to match the values set in a and 13b. This peripheral speed is V _CONT . The V _CONT is controlled individually for each of the winding machines 3a and 3b, but the V _CONT itself is controlled to have the same value for both the winding machines 3a and 3b.

The roller veils 9a and 9b are the package 8
The pressure is applied to a and 8b, but as described later, the roller bail 9
Since the yarn Y that is wound between the a and 9b and the packages 8a and 8b is relaxed, the peripheral speed V _P of the packages 8a and 8b is set to the roller bale 9a and 9b.
It becomes slower than the peripheral speed V _{CONT of} b. That is, as mentioned above,
Spindle drive motor 5 so that V _CONT becomes a constant value
Although a and 5b are controlled, the peripheral speed V _P of the packages 8a and 8b at this time is controlled to a speed slower than V _CONT .

On the other hand, the roller bale driving motor 10a,
10b is controlled as follows. The setter 15 sets the setting signal V _SET (setting 1, setting 2) individually for each series. This signal V _SET is sent as a rotation speed command signal to each roller bale driving motor, and each inverter 16
The induction motors 10a and 10b are controlled via a and 16b. At this time, although the command signal V _SET is sent,
Since each induction motor 10a, 10b has a slip ratio and the roller bale drive system including each induction motor 10a, 10b has a mechanical loss, each roller bale 9a,
9b is actually a speed V _RB slightly slower than the above V _SET.
Try to rotate with.

The speed V _RB of this roller bale is a speed that does not appear as an actual peripheral speed, and if the roller bale is rotated in a free state without contacting the package, it will rotate at that speed. It's speed. That is, as described above, the roller veils 9a and 9b are provided with the spindle drive motors 5a and 5b so that their actual peripheral speeds become constant.
Since it is controlled by control b, it rotates at V _CONT as the actual peripheral speed. However, by making the relationship of V _RB > V _CONT > V _P , V _{R is} exactly V _RB −V _CONT ,
It is possible to make a difference between _CONT and V _P.
CONT -V _P is the relaxation of the yarn will be wound up as a package. In other words, while giving a command to the roller bale driving motors 10a, 10b to rotate at a speed V _RB faster than V _CONT , the actual peripheral speed of the roller bale is controlled by the spindle driving motors 5a, 5b. By controlling to a constant value V _CONT , the roller bale can be made to act on the brake side, and the yarn can be relaxed between the roller bale and the package. The relationship between V _RB , V _CONT and V _P is schematically shown in FIG.

The object of the present invention is to make the above-mentioned relaxed state uniform over the entire weight. A control example will be described using Table 1 below.

[0029]

[Table 1]

In Table 1, the column of the winder 3a indicates a certain operating condition, that is, V _CONT is a peripheral speed of 5000 m / min, and V
_SET is 5100 m / min, V _{RB at} that time is 5080 m / min
Min, V _P is 4920 m / min, V _CONT -V _P
Shows the state of relaxing (-80 m / min). At this time, in the case where a plurality of winders having the same specifications are simply installed in parallel as in the conventional case, in the winder 3b, for example,
V _CONT is the same 5000m / min, V _SET is the same 5100m
/ Min, V _RB is 5060 m / min, V _P is 4940
At m / min, it indicates that the relaxation was -60 m / min. As described above, even if the winders have the same specifications and the same V _CONT and V _SET , due to the difference in the slip ratio of the induction motor and the difference in the mechanical loss of the drive system as described above, Differences appear in the relaxation rate that appears.

The purpose of the present invention is to correct this difference in the relaxation rate. That is, in the conventional winding machine 3b, V _RB is 5060 with respect to V _SET 5100 m / min.
Since it is m / min, the influence of the slip ratio of the induction motor and the mechanical loss of the drive system is exerted only by 40 m / min. V _P (4940 m / min) is later than V _CONT by the amount (−60 m / min) that offsets the amount corresponding to V _RB −V _CONT (+60 m / min), and this −60 m / min is , I'm relaxing on the thread.

On the other hand, in the present invention, V _SET is, for example, 5120 m / min. At this time, since it is considered that the slip ratio of the induction motor and the mechanical loss of the drive system act substantially the same amount as the conventional method (that is, 40 m / min), V _RB is 5080 m / min (+80 m / min for V _CONT).
Min), and to cancel this +80 m / min, V _P
Is 4920 m / min (-80 m / min for V _CONT ). That is, V _CONT −V _P = 80 m / min (−80 m / min of relaxation), and the same relaxed state as that of the winder 3a is controlled.

As described above, according to the present invention, by setting the rotation speed command signal to the roller bale driving motor individually for each winding machine while keeping V _CONT constant for each winding machine, Regardless of variations in the slip ratio and mechanical loss of the drive system, substantially the same relaxation ratio can be obtained, and it becomes possible to obtain a desired package with all weights.

In addition, the slip ratio of the induction motor and the mechanical loss of the drive system change with time (for example, from the beginning of winding to the time of winding).
It may change at the end of winding. Even in such a case, if the set value V _SET of the rotation speed command signal to the roller bale drive motor can be individually changed according to the change, the relaxation rate can be maintained with time. It becomes possible to make it substantially constant over the entire weight.

In this embodiment, from the tensiometers 4a and 4b,
The detected tension of each yarn Y during running (winding) is set momentarily 1
It will be fed back to 5, so V
_SET can be changed to the optimum value. That is, since the tension of the yarn Y corresponds to the relaxation rate that is actually applied to approximately 1: 1, the speed setting V _SET of the roller bale should be adjusted so that the yarn tension becomes substantially constant. Then, a uniform relaxed state appears.

[0036]

【Example】

Example 1 70 denier (d) nylon yarn was controlled speed (V _CONT ).
The roller bale was wound at 5000 m / min, and the rotation speed of each roller bale was set so that the yarn tension was approximately 10 g. The rotation speed of the roller bale was set by the overfeed rate (OF rate) with respect to V _CONT . Table 2 shows the yarn strength, the elongation, and the bulge rate of the package in the obtained package.

The OF rate of the roller bale was set as an acceleration rate for V _CONT of 5000 m / min on the assumption that the slip rate was 0. Further, the bulge rate is [(maximum winding width-mechanical winding width) / mechanical winding width] × 100.
Expressed as (%).

[0038]

[Table 2]

As shown in Table 2, by setting the OF rate of the roller bale to different setting values for the respective winding machines 3a and 3b, the yarn strength, the elongation and the bulge rate of the package are substantially uniform and uniform. I was able to get the package.

Comparative Example 1 A yarn of the same type as in Example 1 was used for controlling speed (V _CONT ) 500.
When winding at 0 m / min, the OF rate of the roller veils of both the winders 3a and 3b is the same in accordance with the conventional method.
It was set to 2%. The results are shown in Table 3.

[0041]

[Table 3]

As shown in Table 3, in Comparative Example 1,
Although the strength of the yarn was substantially uniform, the elongation and the bulge rate of the package were greatly different, and a uniform package could not be obtained.

[0043]

As described above, according to the yarn winding method and winding device of the present invention, the spindles are set so that the peripheral speed of each roller bale becomes a constant value during the simultaneous operation of a plurality of series. The drive motors are individually controlled, and the rotation speed command signals to the roller bale drive motors are individually set so that the peripheral speeds of the packages are substantially constant. On the other hand, the relaxation rate can be substantially the same, and a uniform package having a desired yarn quality can be obtained.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a yarn winding device according to an embodiment of the present invention.

FIG. 2 is a schematic configuration diagram showing a relationship between respective speeds in a winding unit of the apparatus shown in FIG.

[Explanation of symbols]

 1, 2 Godie rollers 3a, 3b Winder 4a, 4b Tensiometer 5a, 5b Spindle drive motor 6a, 6b Spindle 7a, 7b Bobbin 8a, 8b Package 9a, 9b Roller bale 10a, 10b Roller bale drive motor 11a, 11b Rotation speed detection pick-up 12a, 12b Controller 13a, 13b Setting device 14a, 14b Inverter 15 Setting device 16a, 16b Inverter

Claims (6)

[Claims] 1. When winding a yarn on a package formed on a bobbin mounted on a spindle driven by a motor while the roller bale driven by the motor is brought into contact with the package,
Simultaneous operation of multiple winding systems with spindles and roller bale, each spindle drive motor is individually controlled so that the peripheral speed of each roller bale becomes a constant value, and the peripheral speed of each package is substantially constant. A method for winding a yarn, characterized in that the rotation speed command signals to the respective motors for driving the roller bale are individually set so that the values match each other. 2. A motor for driving each roller bale so that the tension of the running yarn is detected on the upstream side of the roller bale as seen in the running direction of each yarn and the detected tension becomes a substantially constant value. The method of winding a yarn according to claim 1, wherein the rotation speed command signals to the yarn are individually controlled. 3. The yarn winding method according to claim 1, wherein the rotation speed command signal to each motor for driving the roller bale is individually set or changed during winding of the yarn. 4. A device for winding a yarn while a motor-driven roller bale is in contact with a package formed on a bobbin attached to a motor-driven spindle, the device comprising a spindle and a roller bale. The systems are arranged side by side so that they can be operated simultaneously, and each winding system controls the spindle drive motor individually so that the peripheral speed of the roller bale becomes a constant value, and the peripheral speed of the package is substantially And a means for individually setting a rotation speed command signal to the roller bale driving motor so as to have a constant value. 5. A yarn tension detecting means is provided on the upstream side of the roller bale as seen in the running direction of each yarn, and each tension detecting means feeds the detected tension back to the corresponding roller bale drive. 5. The yarn winding device according to claim 4, which is connected to a unit for individually setting a rotation speed command signal to the application motor. 6. The yarn winding device according to claim 4, wherein the spindle driving motor and the roller bale driving motor are induction motors, and each induction motor is drive-controlled via an inverter.