JP3473564B2 - Fixed length winding device for automatic winder - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic winder that unwinds a yarn and winds it in a package, and more particularly to a technique for accurately grasping the length of the yarn wound in the formed package.

[0002]

2. Description of the Related Art Conventionally, an automatic winder in which a take-up tube is brought into contact with a rotary drum having traverse grooves, unwinds a yarn, and traverses the rotary drum to wind a package on the take-up tube. It has been known. The package completed by winding the yarns by such an automatic winder needs to have the yarns of a predetermined constant length wound therein. Therefore, in the automatic winder, a yarn winding length, that is, a yarn constant, which is wound into a package while the rotating drum makes one rotation, is set before the operation, and after the operation is started, the rotating drum is set on the yarn constant. The length of the yarn wound on the package was calculated by multiplying the number of rotations of. And
The operation was stopped when the calculated length of the yarn reached the predetermined length.

[0003]

As described above, in the conventional automatic winder, a constant yarn constant value is uniformly set, and based on this value, the yarn is wound into the package from the start of winding. The length of the yarn was calculated. However, due to slippage between the rotary drum and the package, the yarn constant value is such that the presence or absence of wax coating on the yarn, the yarn count, the number of winds on the traverse drum, etc. Since the length varies depending on the winding conditions such as winding conditions and package diameter, the yarn length calculated based on the uniformly set values is
It may not be accurate because it may deviate from the actual yarn length. Therefore, allow a margin in the yarn length value to ensure that the yarn length wound in the completed package is equal to or greater than a certain length. I had to stop the operation after winding the strip. As described above, since it has been forced to wind extra yarns more than necessary into the package, the manufacturing cost of the package is increased.

[0004]

The above is the problem to be solved by the present invention. Next, the means for solving the problem will be described. That is, as in claim 1, wherein, while abutting the package to the rotating drum, in the automatic winder winds the unwound the yarn package, the drum times
A detection unit that detects the number of turns, a storage unit that stores a plurality of set values of the yarn winding length wound around the package per one rotation of the drum, and one of the set values stored in the storage unit Selecting means for selecting and reading, set values read by the selecting means, and drums detected by the detecting means
And a calculation unit that calculates the winding length of the yarn wound on the package based on the number of rotations .

According to a second aspect of the present invention, each set value in the storage section is stored in association with a yarn winding condition,
The selecting means is configured to read a set value corresponding to the yarn winding condition from the storage unit based on the input yarn winding condition.

According to a third aspect of the present invention, there is provided a detecting means for detecting a yarn winding state, each set value of the storage section is stored at least in association with the yarn winding state, and the selecting means is: Based on the yarn winding state detected by the detecting means, a set value corresponding to the yarn winding state is read from the storage unit.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a schematic view showing an automatic winder equipped with a constant length winding device according to the present invention, and FIG. 2 is a yarn constant when the yarn is not wax-coated and a yarn when the yarn is wax-coated.・ Comparison with the constant, Fig. 3 shows the difference in the yarn winding length depending on the number of winds of the traverse drum, and Fig. 4 shows the set value of the yarn constant that changes according to the package diameter. FIG. 5 is a diagram showing the relationship between the yarn constant and the package diameter.

First, a schematic structure of an automatic winder equipped with a constant length winding device according to the present invention will be described with reference to FIG. In the automatic winder 1, the yarn supplying section is arranged in the lower part and the winding section is arranged in the upper part. The yarn supplying bobbin 2 and the like are arranged in the yarn supplying portion, and the traverse drum 6 and the package 3 and the like are arranged in the winding portion.

The yarn Y wound around the yarn supplying bobbin 2 is unwound upward and, after passing through the yarn defect detecting head 5 on the way, is a traverse drum which is a rotary drum having traverse grooves formed therein. 6 is wound around the winding tube 3d while being traversed by 6, and is wound up as a package 3.

Next, the constant length winding device of the automatic winder 1 will be described. A drum rotation speed sensor 7 is arranged beside the traverse drum 6, and a package diameter sensor 8 is arranged beside the package 3. The drum rotation speed sensor 7 and the package diameter sensor 8 are connected to the controller 9.

An arithmetic unit 11 is formed in the controller 9, and the number of rotations of the traverse drum 6 detected by the drum rotation number sensor 7 and yarn winding conditions such as the presence / absence of wax coating on the yarn Y, etc. The length of the yarn Y wound on the package 3 is calculated based on the above.

Specifically, the so-called yarn constant value, which is the winding length of the yarn Y wound around the package 3 during one rotation of the traverse drum 6, is stored in the controller 9 as described later. Among the plurality of yarn constant values stored in the storage device 12, a plurality of yarn constant values stored in the device 12 are stored in the storage unit 12. The yarn constant values corresponding to the yarn winding conditions such as the yarn winding condition and the package diameter are stored. A selection unit 11a that selects and calls from the storage device 12 is provided, and the yarn constant value called by the selection unit 11a is multiplied by the rotation speed of the traverse drum 6 detected by the drum rotation speed sensor 7. The length of the yarn wound on the package 3 is calculated.

Here, it was found from an experiment that there is a relationship between the yarn constant value and the package diameter as shown in FIG. As can be seen from FIG. 5, the yarn constant value increases with the diameter up to a certain package diameter Ra, and becomes a substantially constant yarn constant value La above a certain package diameter Ra. Further, it was found from an experiment that the yarn constant value changes depending on the presence or absence of wax coating on the yarn Y and the yarn winding conditions such as the yarn count of the yarn Y.

For example, when wax is applied to the yarn Y, the slip between the package 3 around which the yarn Y is wound and the traverse drum 6 becomes larger than that when the wax is not applied. As shown in FIG. 2, the yarn constant value Yq when the wax is applied to the yarn Y is generally smaller than the yarn constant value Yp when the wax is not applied to the yarn Y. It becomes a value.

The value of the yarn constant also varies depending on the size of the yarn count of the yarn Y wound up in the package 3, that is, the thickness of the yarn Y. When the yarn diameter is small, the yarn is constant. The yarn constant value is generally higher than that of the case where the diameter is thick.

Further, the yarn constant value is also the same depending on the winding number of the traverse drum 6 (the number of revolutions of the traverse drum 6 required for the yarn Y to be traversed from one end to the other end of the traverse range). On the contrary, when the number of winds is small, the value of the yarn constant is larger than that when the number of winds is large. This is because the length of the yarn Y wound up during one rotation of the traverse drum 6 differs depending on the number of winds. For example, as shown in FIG. 3, the winding length W1 when the number of winds is 1 W is √
(T ² + C ² ), and the winding length W2 when the number of winds is 2 W is √ {(1 / 2T) ² + C ² }, so that the winding length W1 of 1 W with a small number of winds is The wind number is 2
This is because the winding length W of W is longer than W2. In this case, T represents the traverse length of the traverse drum 6 per rotation, and C represents the perimeter of the traverse drum 6.

As described above, since the yarn constant value varies depending on the presence or absence of wax in the yarn Y, the yarn count, and the number of winds of the traverse drum 6, the set value of the yarn constant to the automatic winder is uniform. If it has been decided, a deviation may occur between the set value and the actual yarn constant value, and the accuracy of the calculated yarn length may deteriorate.

Therefore, in the automatic winder, the storage device 12 stores various yarn winding conditions such as the presence or absence of wax on the yarn Y, the yarn count, the number of winds of the traverse drum 6, and / or the package diameter. A plurality of yarn constant set values set according to the yarn winding state of the above are stored, and an appropriate yarn constant value corresponding to the yarn winding condition and the yarn winding state is read from the storage device 12 and read out. Based on the yarn constant value and the drum rotation speed detected by the drum rotation speed sensor 7, the arithmetic unit 11 calculates the total yarn length wound on the package 3. In this case, the yarn length is calculated by considering only the yarn winding condition without considering the yarn winding state (package diameter, etc.) that changes during winding, and the yarn winding without considering the yarn winding condition. There are cases in which the yarn length is calculated considering only the state, and cases in which the yarn length is calculated considering both the yarn winding condition and the yarn winding state. First, only the yarn winding condition is considered. The case will be described.

In the first example in which only the yarn winding condition is taken into consideration, the storage device 12 of the controller 9 stores various information such as the presence / absence of wax in the yarn Y, the yarn count, and the number of winds of the traverse drum 6. A plurality of yarn constant set values set according to the yarn winding condition are stored. Here, each stored yarn constant value is a constant value that is not related to the package diameter. An input device 10 is attached to the controller 9 so that the yarn constant value of the storage device 12 can be set or changed. Also, the presence or absence of wax on the yarn Y, the yarn count,
Various yarn winding conditions such as the number of winds of the traverse drum 6 can be input to the selection means 11a via the input device 10. The selection means 11a is adapted to select and read the corresponding yarn constant value from the storage device 12 based on the yarn winding condition input from the input device 10.

Before starting the winding operation, the input device 10
When the above-mentioned various yarn winding conditions are input, the yarn constant setting values corresponding to the input yarn winding conditions are among the yarn constant setting values stored in the storage device 12 by the selecting means 11a. To the arithmetic unit 11, and the read yarn constant setting value is
The number of rotations of the traverse drum 6 detected by the drum rotation number sensor 7 is multiplied to calculate the length of the yarn wound around the package 3. Also, before starting the winding work,
The total yarn length of the yarn Y that needs to be wound into one package 3 is input into the controller 9 via the input device 10, and the yarn length calculated by the calculation unit 11 of the controller 9 is input. When the total thread length is reached, the operation stops,
The winding of the yarn around the package 3 is completed.

In this case, as the set value of the yarn constant, which is one of the criteria for calculating the total yarn length, values corresponding to various yarn winding conditions are read from the storage device 12 and the yarn length is calculated. Therefore, it is possible to calculate an accurate yarn length that does not deviate from the actual yarn length. As a result, the total yarn length wound around the package 3 when the automatic winder 1 is stopped and the total yarn length input from the input device 10 can be made to substantially match with each other, and unnecessary extra yarn Y is required. Since it is not necessary to wind the package 3 around the package 3, the manufacturing cost of the package 3 can be reduced. Also, since the yarn constant value is set according to various yarn winding conditions, it is possible to correspond to various yarn types, counts, forms of the package 3 to be formed, and the versatility of the automatic winder 1 is improved. Can be made.

Further, the total yarn length previously input into the controller 9 and the yarn length calculated by the arithmetic unit 11 of the controller 9 may be made to substantially coincide with each other as follows. A second example described below is an example in which only the yarn winding state is considered. In the second example, the traverse drum 6 detected by the drum rotation speed sensor 7 is set to a yarn constant set value that changes according to the package diameter of the package 3 detected by the package diameter sensor 8. The yarn length is calculated by multiplying by the number of rotations.

As shown in FIG. 5, the yarn constant increases as the package diameter increases until the package diameter reaches a certain size. Therefore, in this example, the yarn constant is wound around the package 3. The set value of yarn constant for calculating the yarn length is changed according to the package diameter.

The set value of the yarn constant which changes according to the package diameter is as shown in the table shown in FIG. 4, for example. The table is created based on the experimental data shown in FIG. The storage unit 12
Remembered in. In the table, the set value of the yarn constant from the winding start of the yarn Y to the package diameter becoming R1 is constant at L1, and the yarn constant between the package diameter becoming R1 and R2. The set value of is constant at L2, and the package diameter is R2.
The set value of the yarn constant between L3 and R3 is constant at L3, and the set value of the yarn constant is constant at L4 when the package diameter is R3 or more.

In this case, the package diameter values R1 ・ R2 ・
R3 indicates the relationship of R1>R2> R3, and the yarn constant values L1, L2, L3, and L4 indicate the relationship of L1>L2>L3> L4, respectively. Also, the package diameter R3 and the yarn constant value L4
Are the values corresponding to the package diameter Ra and the value yarn constant La in FIG. 5, respectively.

That is, while the yarn constant increases with the package diameter (from the start of winding until the package diameter reaches R3), the set value of the yarn constant changes stepwise according to the degree of increase. I am trying to make it happen. Thus, in this second example,
A plurality of yarn constant values are stored in the storage device 12 according to the package diameter. The package diameter values R1, R2, R3 and the yarn constant value L
The settings of 1, L2, L3, and L4 can be changed by the input device 10. Further, in this example, the package diameter is detected by the package diameter sensor 8, and the detected package diameter is input to the selection means 11a. The selecting means 11a is adapted to read the corresponding yarn constant value from the storage device 12 based on the inputted package diameter. The read yarn constant value is multiplied by the rotation speed of the traverse drum 6 in the calculation unit 11.

As a result, the total yarn length wound on the package 3 is calculated as follows. First, the total yarn length TL1 from the start of winding until the package diameter reaches R1 is N times the number of revolutions of the traverse drum 6 from the start of winding to the time of calculation.
If it is 1, it is calculated by TL1 = L1 × N1.
When the package diameter is within the range from R1 to R2, the total yarn length TL2 is TL2 when the number of revolutions of the traverse drum 6 is N2 from the time when the package diameter becomes R1 to the time of calculation. = TL1 + L2 × N2.

Further, when the package diameter is in the range from R2 to R3, the total yarn length TL3 is N3 as the number of revolutions of the traverse drum 6 from the time when the package diameter becomes R2 to the time of calculation. Then, TL3 = TL1 + TL2 + L3 ×
Calculated by N3. When the package diameter is larger than R3, the total yarn length TL4 is TL4 = TL1 + TL2 + TL, where N4 is the number of revolutions of the traverse drum 6 from the time the package diameter becomes R3 to the time of calculation.
It is calculated by 3 + L4 × N4.

As described above, the arithmetic unit 1 in the controller 9
1, the rotation speed of the traverse drum 6 detected by the drum rotation speed sensor 7, the package diameter of the package 3 detected by the package diameter sensor 8, and the storage unit 12
The total yarn length wound on the package 3 is calculated on the basis of the table indicating the relationship between the package diameter and the yarn constant stored in FIG.

The controller 9 is further provided with an input device 10 for inputting the total yarn length required for the formed package 3, and the calculated total yarn length reaches the input total yarn length. Then, the operation is stopped and the winding of the yarn around the package 3 is completed.

In this case, the set value of the yarn constant, which is one of the criteria for calculating the total yarn length, should be changed stepwise in accordance with the actual change of the yarn constant which changes according to the package diameter. Since the total yarn length can be accurately calculated, the total yarn length wound around the package 3 when the automatic winder 1 is stopped and the total yarn length input by the input device 10 can be calculated. It can be almost matched. As a result, it is not necessary to wind extra yarn Y around the package 3, and the manufacturing cost of the package 3 can be reduced.

Next, a third example will be described in which the yarn length is calculated in consideration of both the yarn winding condition and the yarn winding state. As described above, since the yarn constant value varies depending on various yarn winding conditions, in the third example, the storage device 12 in the controller 9 stores the yarn constant value and the package diameter corresponding to each yarn winding condition. A plurality of tables indicating the relationship with are stored. For example,
Between a plurality of tables, the yarn / constant values L1, L2, L3, L4 and package diameters R1, R2 shown in FIG.
-The value corresponding to R3 differs depending on the yarn winding conditions.

Then, by inputting the yarn diameter of the yarn Y to be wound, the presence / absence of wax application to the yarn Y, the winding number of the traverse drum 6 and the like into the input device 10. , The selecting means 11a selects the yarn according to the input condition.
A table of constant set values is read from the storage device 12, further, the selecting means 11a reads a yarn constant value corresponding to the package diameter from the table based on the package diameter detected by the package diameter sensor 8, and the read yarn.・ Using constant values,
The total yarn length wound on the package 3 is calculated by the calculation unit 11.

As described above, since a plurality of yarn constant setting values are prepared in accordance with various yarn winding conditions and / or yarn winding states, various yarn types, counts, forms of the package 3 to be formed, etc. Therefore, it is possible to achieve accurate constant length winding.

[0035]

Since the present invention is constructed as described above, it has the following effects. That is, in the automatic winder for winding the unwound yarn on the package while bringing the package into contact with the rotating drum as described in claim 1, the detecting means for detecting the number of rotations of the drum, and the drum 1
A storage unit that stores a plurality of set values of the yarn winding length wound around the package per rotation, a selection unit that selects and reads one of the plurality of set values stored in the storage unit, and the selection unit. detection in read set value by said detecting means
It has a calculation unit that calculates the winding length of the yarn wound on the package based on the number of rotations of the drum taken out, so that the yarn can be accurately wound on the package by a predetermined length. You can As a result, it is not necessary to wind an extra yarn around the package, and the manufacturing cost of the package can be suppressed.

Further, as set forth in claim 2, each set value in the storage section is stored in association with the yarn winding condition,
Since the selection means reads the set value corresponding to the yarn winding condition from the storage unit based on the inputted yarn winding condition, even if the yarn winding condition is variously changed, only the yarn of the predetermined length is changed. Can be accurately wound into a package.
This eliminates the need to wind an extra yarn around the package even when the yarn is wound under various yarn winding conditions, and the manufacturing cost of the package can be suppressed.

According to a third aspect of the present invention, a detection means for detecting the yarn winding state is provided, each set value of the storage section is stored at least in association with the yarn winding state, and the selecting means is: Since the set value corresponding to the yarn winding state is read from the storage unit on the basis of the yarn winding state detected by the detecting means, the influence of the change in the yarn constant value due to the change in the yarn winding state during the winding of the yarn is prevented. Can be lost,
The thread can be accurately wound into the package by a predetermined length. As a result, it is not necessary to wind an extra yarn around the package, and the manufacturing cost of the package can be suppressed.

[Brief description of drawings]

FIG. 1 is a schematic view showing an automatic winder equipped with a constant length winding device according to the present invention.

FIG. 2 is a diagram comparing a yarn constant when a yarn is not coated with wax and a yarn constant where a yarn is coated with wax.

FIG. 3 is a diagram showing a difference in yarn winding length depending on the number of winds of a traverse drum.

FIG. 4 is a diagram showing set values of yarn constants that change according to a package diameter.

FIG. 5 is a diagram showing the relationship between yarn constant and package diameter.

[Explanation of symbols]

1 automatic winder 3 packages 6 traverse drum 7 Drum rotation speed sensor 8 Package diameter sensor 9 Controller

Claims (3)

(57) [Claims] 1. An automatic winder for winding the unwound yarn on a package while bringing the package into contact with a rotary drum, and a detection means for detecting the number of rotations of the drum, and winding the package per one rotation of the drum. A storage unit for storing a plurality of set values of the thread winding length, a selection unit for selecting and reading one of the plurality of set values stored in the storage unit, and a setting value read by the selection unit. And detected by the detection means
A constant-length winding device for an automatic winder, comprising: a calculation unit that calculates a winding length of a yarn wound into a package based on the number of rotations of a drum . 2. Each of the set values in the storage unit is stored in association with a yarn winding condition, and the selecting means sets a set value corresponding to the yarn winding condition based on the input yarn winding condition. The fixed-length winding device for the automatic winder according to claim 1, wherein the constant-length winding device is configured to read from the storage unit. 3. A detection means for detecting a yarn winding state is provided,
Each setting value of the storage unit is stored in association with at least the yarn winding state, and the selecting unit sets the setting value corresponding to the yarn winding state based on the yarn winding state detected by the detecting unit. The constant-length winding device for an automatic winder according to claim 1 or 2, which is configured to read from the storage unit.