JPH06101132A - Thread tension control device - Google Patents

Abstract

(57) [Summary] [Purpose] To easily change the tension at the time of winding the warp sheet in a complicated manner according to the winding amount of the beam for each yarn type. [Structure] A winding amount detecting device 9, 12, 13 for detecting the winding amount of the beam B is provided, and a tension signal is obtained from a winding amount signal output from the winding amount detecting device by using a preset relational expression. An arbitrary function setting type tension setting device 14 is provided, and a tension control device 15 for controlling the tension at the time of winding the warp sheet y according to the tension signal output from the tension setting device is provided. The tension is set to change in a curved shape or a polygonal line shape according to the relational expression of setting in the tension setting device 14. The tension setting device 14 presets a plurality of relational expressions corresponding to a plurality of yarn types and uses the selected relational expression.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for controlling the tension of a warp sheet wound around a beam in a weaving preparation machine such as a warp sizing machine, a beam rewinding machine and a warping machine.

[0002]

2. Description of the Related Art In a weaving preparation machine, the tension of a warp sheet wound around a beam is kept constant during winding or is reduced at a constant rate.

In the warp sheet wound up in the beam in this way, residual stress is not uniform in each layer of the wound layer, and inconvenience may occur in the subsequent steps.

Therefore, as illustrated in JP-A-57-195071, in order to make the residual stress after the winding of the warp sheet uniform in each layer of the winding layer, the tension at the time of winding the warp sheet is set. Is changed into a curved shape or a broken line shape in a complicated manner according to the winding diameter of the beam.

Since the elastic properties of the warp relating to the residual stress after the winding of the warp sheet are different for each yarn type, the method of changing the tension of the warp sheet is changed when the yarn type is different.

[0006]

However, in the weaving preparation machine, when the tension at the time of winding the warp sheet is complicatedly changed into a curved shape or a bent line shape in accordance with the winding amount of the beam, the worker winds the wound yarn. Operate manually while watching the amount. Also, the manual operation is performed according to the yarn type.

Accordingly, since the manual operation requires a lot of trouble, there is an erroneous operation, and the tension at the time of winding the warp sheet does not change as desired.

After all, it is difficult to change the tension at the time of winding the warp sheet intricately according to the winding amount of the beam for each yarn type.

An object of the present invention is to solve the above conventional problems.

[0010]

SUMMARY OF THE INVENTION According to the present invention, in a yarn tension control device for changing the tension of a warp sheet wound around a beam according to the winding amount of the beam, a winding amount detection for detecting the winding amount of the beam. A tension setting device of an arbitrary function setting type is provided to obtain a tension signal using a relational expression preset from the winding amount signal output from the winding amount detection device. A tension control device for controlling the tension at the time of winding the warp sheet is provided, and the tension at the time of winding the warp sheet is configured to change in a curved shape or a polygonal line shape according to a relational expression preset in the tension setting device. It is a characteristic yarn tension control device.

Further, according to the present invention, in the above-described yarn tension control device, the tension setting device presets a plurality of relational expressions corresponding to a plurality of yarn types and uses the selected relational expression. Is a yarn tension control device.

[0012]

In the present invention, the tension at the time of winding the warp sheet changes according to the relational expression preset in the tension setting device of the arbitrary function setting type. If a relational expression of a curved line or a broken line is set in advance in the tension setting device, the tension at the time of winding the warp sheet changes to a curved line or a broken line.

Further, in the present invention, when winding a warp sheet having a different thread type from the previous time, the relational expression corresponding to the current thread type is selected from a plurality of relational expressions preset in the tension setting device. . Then, the tension at the time of winding the warp sheet changes according to the selected relational expression.

[0014]

In the present invention, the tension at the time of winding the warp sheet changes in accordance with the relational expression preset in the tension setting device of the arbitrary function setting type, and therefore, unlike the conventional manual operation, It is easy to change the tension at the time of winding the warp sheet in a curved shape or a polygonal line shape in accordance with the winding amount of the beam without the trouble of

Further, in the present invention, when winding a warp sheet having a different yarn type, a relational expression corresponding to the yarn type may be selected from a plurality of relational expressions preset in the tension setting device. It is easy to change the tension of each yarn type.

[0016]

EXAMPLE This example is a yarn tension control device for controlling the tension of a warp sheet wound around a beam of a loom in a winding section of a warp sizing machine or a beam rewinding machine.

In the winding section, as shown in FIG. 1, the warp sheet y passes through the reed 1, the length measuring roller 2, the feed roller 3, the tension detecting roller 4 and the guide roller 5 in sequence and is wound around the beam B. A tension detector 6 for detecting the force exerted by the warp sheet y on the tension detection roller 4 is provided.

As shown in FIG. 1, the feed roller 3 is connected to a feed roller drive motor 8 via a transmission mechanism 7, and the transmission mechanism 7 is connected to a warp speed detecting device 9 for detecting the traveling speed of the warp sheet y. is doing.

As shown in FIG. 1, the shaft for supporting and rotating the beam B is connected to a beam drive motor 11 via a transmission mechanism 10, and the transmission mechanism 10 rotates the beam to detect the number of rotations of the beam B. The number detection device 12 is connected.

The warp speed signal output by the warp speed detecting device 9 and the beam speed signal output by the beam speed detecting device 12 are input to a winding diameter calculator 13 as shown in FIG. The signal is divided by the beam rotation speed signal and converted into a winding diameter signal. That is, the warp speed detecting device 9, the beam rotation speed detecting device 12, and the winding diameter calculator 13 constitute a winding diameter detecting device for detecting the winding diameter of the beam B.

The winding diameter signals output from the winding diameter detecting devices 9, 12, and 13 are input to the tension setting device 14, as shown in FIG. The tension setting device 14 is an arbitrary function setting type, and a plurality of relational expressions showing the relation between the tension at the time of winding the warp sheet y and the winding diameter of the beam B are preset in the form of a number table or an equation. , The tension signal is obtained from the winding diameter signal by using one relational expression selected in advance from the plurality of set relational expressions.

A tension signal output from the tension setting device 14,
The winding diameter signals output from the winding diameter detecting devices 9, 12, and 13 are input to the tension control device 15, as shown in FIG.
Further, the tension control device 15 receives the detected value of the tension output from the tension detector 6 and the preset value of the warp speed set in the warp speed setter 16. In the tension control device 15, the detected value of the tension output by the tension detector 6 is compared with the tension signal output by the tension setting device 14, that is, the set value of the tension, and there is a difference between the detected value of the tension and the set value. If there is a difference,
Also, the rotational speed of the beam drive motor 11 is increased or decreased in accordance with the set value of the warp speed and the rotational speed of the beam B obtained from the winding diameter signal to adjust the tension of the warp sheet y and set the detected tension value. Match the value.

The warp speed signal output from the warp speed detecting device 9 and the set value of the warp speed preset in the warp speed setting device 16 are input to the warp speed control device 17, as shown in FIG. In the warp speed control device 17, the detected value of the warp speed output by the warp speed detection device 9 is compared with the set value of the warp speed preset in the warp speed setting device 16 to detect the detected value of the warp speed and the set value. If there is a difference between them, the number of rotations of the feed roller drive motor 8 is increased or decreased according to the difference to adjust the speed of the warp sheet y so that the detected warp speed matches the set value.

In the yarn tension control device of this embodiment, the relational expression showing the relation between the tension at the time of winding the warp sheet y and the winding diameter of the beam B is applied to the tension setting device 14 of the arbitrary function setting type. ) Three types of yarns, polyester yarns and glass yarns are stored in advance.

In the relational expression PA for polyamide yarn,
As shown in the upper part of FIG. 2, the tension T at the time of winding the warp sheet y changes in a curved shape, increases as the winding diameter D of the beam B increases from the minimum winding diameter, and reaches the maximum value. After that, the winding diameter D of the beam B decreases as the winding diameter D increases, and the beam B
When the winding thread diameter D becomes the maximum winding thread diameter, it becomes the minimum value.

In the relational expression PE for polyester yarn, as shown in the middle part of FIG. 2, the tension T at the time of winding the warp sheet y changes into a curved shape, a straight shape and a curved shape, and the beam B is wound. The yarn diameter D increases in a curve as the yarn winding diameter D increases from the minimum winding yarn diameter, and is maintained at the maximum value even if the winding yarn diameter D of the beam B is increased for a certain period after reaching the maximum value. As the winding diameter D of B increases, it decreases in a curve, and when the winding diameter D of the beam B reaches the maximum winding diameter, it becomes the minimum value.

In the relational expression GL for glass yarn, FIG.
As shown in the lower part of FIG.
Changes to a polygonal line shape, and even if the winding diameter D of the beam B increases from the minimum winding diameter, it is maintained at the maximum value for a certain period, and then becomes constant as the winding diameter D of the beam B increases. When the winding diameter D of the beam B reaches the maximum winding diameter, it becomes the minimum value.

When the warp sheet y wound around the beam B is a polyamide yarn, the relational expression PA for the polyamide yarn is selected by a switch (not shown) before winding. Then, the tension T at the time of winding the warp sheet y changes in a curved shape as shown in the upper part of FIG. 2 as the winding diameter D of the beam B increases.

When winding the polyester yarn after winding the polyamide yarn, the relational expression PE for the polyester yarn is selected. Then, the tension T at the time of winding the warp sheet y changes as shown in the middle part of FIG. 2 as the winding diameter D of the beam B increases.

After that, when winding the glass yarn, the relational expression GL for the glass yarn is selected. Then, the warp sheet y
The tension T at the time of winding is changed as shown in the lower stage of FIG. 2 as the winding diameter D of the beam B is increased.

<Modification> 1) In the embodiment, the winding diameter detecting device for detecting the winding diameter of the beam B is composed of a warp speed detecting device 9, a beam rotation speed detecting device 12 and a winding diameter calculator 13. Although configured, another detection device such as detecting the displacement of the roller contacting the surface of the winding layer of the beam B is used.

2) In the embodiment, the winding amount detecting device for detecting the winding amount of the beam is the winding diameter detecting devices 9, 12,
13 and the relational expression showing the relation between the tension at the time of winding the warp sheet y and the winding diameter of the beam B is set in the tension setting device 14. The winding amount detecting device is the winding length detecting device. Then, in the tension setting device 14, a relational expression showing the relation between the tension at the time of winding the warp sheet y and the winding length of the beam B is set.

[Brief description of drawings]

FIG. 1 is a schematic view showing a side view of a mechanical portion and a block diagram of an electric portion of a yarn tension control device according to an embodiment of the present invention.

FIG. 2 is a diagram schematically showing a relationship between a tension at the time of winding a warp sheet and a winding diameter of a beam for a polyamide yarn, a polyester yarn and a glass yarn.

[Explanation of symbols] y warp sheet B beam 9, 12, 13 winding diameter detection device, winding amount detection device 14 tension setting device of arbitrary function setting type 15 tension control device PA relational expression for polyamide yarn PE polyester yarn Relational Expression for GL Glass Yarn

Claims (2)

[Claims] 1. A yarn tension control device for changing the tension of a warp sheet wound around a beam according to the winding amount of the beam, wherein a winding amount detecting device for detecting the winding amount of the beam is provided to detect the winding amount. A tension setting device of an arbitrary function setting type that obtains a tension signal using a preset relational expression from the winding amount signal output from the device is provided, and when the warp sheet is wound according to the tension signal output from the tension setting device, A yarn tension control device characterized in that a tension control device for controlling the tension is provided, and the tension at the time of winding the warp sheet is changed into a curved line or a polygonal line according to a relational expression preset in the tension setting device. 2. The yarn according to claim 1, wherein the tension setting device presets a plurality of relational expressions corresponding to a plurality of yarn types and uses the selected relational expression. Tension control device.