JPH0781843A - Method for adjusting tension of winder - Google Patents

Abstract

PURPOSE:To enable a winder which applies high tension to a thread to be assembled into a large package without the amplifying action of the tension resulting from fluctuations in the traverse length of the thread during winding traverse motion. CONSTITUTION:This method is for winding a thread 3 to be wound, that is released from a feed bobbin, onto a package 14 via a feed-roller type thread tension adjustment means 1, a fixed guide 9, a thread retaining guide 11, and a traverse guide 12 for reciprocating the thread 3 horizontally, the package 14 rotating in contact with a driving drum 13. The working surface of the thread retaining guide 11 is curved with respect to a horizontal plane, and the tension applied to the thread 3 and the traverse are utilized to wind the thread 3 in sliding contact with the curved surface.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a winding machine provided with a winding traverse that reciprocates in the horizontal direction, and more particularly to the problem of the winding machine requiring a high tension in the processing of yarns and the like. The present invention relates to a tension adjusting method for preventing the tension amplifying action caused by the fluctuation of the traverse length of the yarn at the time of high-speed winding traverse.

[0002]

2. Description of the Related Art Conventionally, fluctuations in yarn speed and fluctuations in tension caused by a winding traverse in a winding machine have been absorbed by the expansion and contraction action of yarns such as ballooning which occurs during yarn unwinding. Further, the absorption capacity is larger as the frictional resistance to the yarn from the yarn feeding to the winding is smaller, and the large frictional resistance to the yarn from the yarn unwinding to the winding traverse is larger than that of the yarn path in general. Amplifies the tension and its fluctuation. Therefore,
Generally, in high-speed winders such as cheese winding that require high-speed traverse, the yarn speed fluctuation and tension fluctuation are increased by the speed, so the yarn path from the yarn supplying bobbin to the winding is as straight as possible. In addition, by reducing the frictional resistance to the yarn, it is possible to suppress tension fluctuations and support high-speed traverse.

However, in a take-up machine, such as a fluffing machine, which requires a high tension to process a yarn, when the take-up traverse speed is high, the change in tension between the traverses and the change in yarn speed increase. Therefore, the repulsive force of high frictional resistance to the yarn is increased, and the tension and its variation in yarn processing and winding are greatly increased. Therefore, in general, flange bobbin winding that does not cause traversing even if the traverse speed is slowed down relative to the winding speed is adopted, and it is handled by suppressing the increase in tension and its fluctuation due to high speed traverse. ing.

However, the flange bobbin winding interferes with the unwinding of the flange, and if the diameter of the flange is large, the frictional resistance to the yarn at the time of unwinding the yarn also becomes large. Thread breakage occurs frequently and it cannot be packaged in large packages. Therefore, even in a winder that requires high tension for thread processing, etc.
In order to prevent traversing, it is necessary to wind it into a shape such as cheese winding without a flange that requires high-speed traverse. In this case, as a thread tension adjusting means, a feed roller as shown in FIG. 4 was used. A thread delivery mechanism is required.

The outline of the feed roller type yarn tension adjusting means will be described with reference to FIG. 4. The means (1) is a feed roller (2) which is positively driven and a guide roller (4) which is driven by a yarn (3). The running yarn (3) is composed of two pairs of rollers (2).
After winding the outer circumference of (4) several times as shown in the figure, the winding tension adjusting roller (5) and thread guide (6) enter the grooved drum (7), and the winding is then pressed against the groove. The bobbin (8) is wound up. The feed roller type yarn tension adjusting means (1) is configured to weaken the tension by winding the yarn (3) in contact with the surface of the rotating feed roller (2) and feed it out. When the frictional resistance of the feed roller (2) is large, the repulsive force of tension fluctuation increases, so the surface is smoothed,
The yarn (3) slides on the surface of the feed roller (2) to reduce tension fluctuation due to repulsive force of frictional resistance to the yarn (3). Therefore, generally, the peripheral speed of the feed roller (2) is made faster than the winding yarn speed, and the tension is adjusted while sliding the yarn (3).

However, although this slippage has a buffering effect against the impact due to the tension fluctuation, it does not have the ability to contract the yarn (3), and the yarn speed fluctuation and the tension fluctuation due to the high speed traverse have large frictional resistance. It is transmitted to the yarn processing section to amplify tension fluctuations. Therefore, in a winding machine that requires high tension for yarn processing, even if the above-mentioned feed roller type yarn tension adjusting means (1) is used, the limit of high strength that can withstand large amplified tension fluctuations. Only the thread (3) that has been cut can be set. In addition, the greatest factor that the tension fluctuation is amplified is the yarn speed fluctuation caused by the high-speed traverse, and it is necessary to prevent the tension fluctuation from being amplified unless the yarn speed fluctuation is transmitted to the yarn processing part with a large friction resistance. I can't. Therefore, it is difficult to make a large package in a winding machine such as a fluffing machine that requires a high tension to process the yarn, except for a special yarn with high strength,
The doffing man-hours are enormous.

[0007]

As described above, when it is desired to make the winding package large, the flange of the flange bobbin hinders unwinding, so that the cheese bobbin or the like must be formed without a flange. However, in order to wind the yarn in a shape without a flange, a high-speed traverse is required to prevent traversing, and under a high-speed traverse, the yarn speed change between traverses becomes noticeable.
The following problems are caused.

That is, as shown in FIG. 3, when the center point of the traversed yarn is set to 0, the yarn (3) is wound while linearly reciprocating between the ends AB of the traverse.
However, the traverse length L of the yarn (3) is changed between traverses because what is to be reciprocated on an arc whose radius is the traverse distance L of the yarn (3) is converted into a linear motion. Changes. If the traverse speed is V _t ,
Since V _t is always constant, even if the winding speed is constant, the running length of the yarn per time between traverses,
That is, the yarn speed changes according to the variation of the traverse length L. Here, if the conversion angle of the traverse motion is θ, the yarn speed difference between traverses is V _t · tan θ, and if the traverse speed is fast, the yarn speed difference is also increased, and because the traverse speed is fast, the yarn speed is abruptly increased. The speed fluctuates.

Further, the fluctuation of the yarn speed in the above description affects the frictional resistance to the yarn (3), but the acceleration due to the rapid fluctuation of the yarn speed is added to this. Therefore, if the frictional resistance to the yarn is small, the effect of the sudden change in acceleration is small, but if the frictional resistance to the yarn is large, the sudden change in acceleration and the frictional resistance to the yarn act alternately and the tension Fluctuations are amplified and push up the overall tension. Therefore, in a winder such as a fluffing machine that requires a high frictional resistance to the yarn, fluctuations in the yarn speed due to the increased traverse speed are transmitted to the high frictional resistance portion to the yarn. Due to the interaction between the fluctuation and the frictional resistance, the tension and the fluctuation of the tension are amplified and the yarn breaks frequently, making it impossible to wind.

As described above, the root cause of the problem is the fluctuation of the traverse distance L due to the conversion of the traverse motion from the circular arc motion to the linear motion, and based on this, as described above,
Fluctuations in yarn speed and tension are caused by "interaction between yarn speed fluctuation and frictional resistance". The present invention has an object to solve such a problem, and solves the above problem by deforming the locus of the yarn path according to the variation of the traverse distance L.

[0011]

In order to achieve the above object, the method of the present invention specifically has the following constitution. That is,
The yarn to be wound up unwound from the yarn supplying bobbin is sequentially passed through a feed roller type yarn tension adjusting means, a fixed guide, a yarn storage guide, and a traverse guide for horizontally reciprocating the yarn to a drive drum. A method of winding on a package that rotates in contact, in which the working surface of the yarn storage guide is formed into a curved surface with respect to a horizontal plane, and the tension is applied to the target yarn and the traverse causes it to slide on the curved surface. It is characterized by winding while moving.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The method of the present invention will be specifically described below with reference to the embodiments shown in the drawings. In the following embodiments, the same components as those of the conventional device are designated by the same reference numerals, and detailed description thereof will be omitted. First, the structure of an apparatus for carrying out the method of the present invention will be described. As shown in FIG. 1, a yarn (3) to be wound is unwound from a yarn supplying bobbin (not shown), and a feed roller (2) actively driven and a guide roller (following rotation by a yarn (3) ( 4) a feed roller type yarn tension adjusting means (1), a fixed guide (9) serving as a fulcrum of a traverse motion generated by a traverse motion described later, and a cam box (1).
0) A semi-circular guide rod standing upright on the yarn storage guide (1
1), a drive drum (13) that positively rotates and the drum (1) via various mechanisms of a traverse guide (12) that reciprocates the target yarn (3) horizontally and horizontally in the figure.
3) enters the nip point between the packages (14) that are driven to rotate and is wound around the packages (14).

The function and shape of the yarn accumulating guide (11) which is a feature of the method of the present invention in the winding machine having the above-mentioned structure will be described in detail with reference to FIG. That is, the target yarn (3) is traversed by the reciprocating motion of the traverse guide (12) around the fixed guide (9) and is wound around the package (14). At this time, as described above, the yarn in the traverse motion is wound. Since the circular arc motion of (3) is converted into the linear motion, the traverse length L becomes the minimum in the central portion of the traverse, and the fluctuation of the traverse length becomes the largest factor of the yarn speed fluctuation. Therefore, if the linear motion of the yarn (3) in the winding traverse is reconverted into an arc motion, the traverse length does not change, but it cannot be reconverted in the horizontal direction. Therefore, the yarn (3) is used in the present invention. It is intended to make the traversing length constant by moving the and the circular arc in the vertical direction. That is, an arc-shaped yarn storage guide (1
1) is erected, and the traverse guide (12) is intended to be corrected by sliding the traverse yarn (3) on the yarn accumulating guide (11) to make it constant. ) To set the thread (3) on B-
A yarn storage guide (11) is provided between B '. At this time, as the yarn storage guide (11) approaches the fixed guide (9), the radius of the arc-shaped yarn storage guide (11) becomes smaller and the rising resistance of the sliding yarn (3) becomes larger. The storage guide (3) should be as close as possible to the traverse guide (12) as long as it does not affect workability.

The shape of the yarn accumulating guide (11) is determined by the standing position and the height of the traverse center, that is, the height H of the yarn accumulating guide (11). The traverse length can be corrected in a timely manner by using an arc connecting the tops of the height H, but the length of the yarn sliding on the yarn storage guide (11), that is, from the fixed guide (9) to the yarn storage guide. (1
The length d up to 1), the length e from the yarn storage guide (11) to the guide guide (15), and the length c between the guide guide (15) and the traverse guide (12) are added. The height H of the yarn storage guide (11) is determined so that the maximum traverse length L is the same.

That is, L = d + e + c, but since d and e are unknowns, the distance from the fixed guide (9) to the yarn storage guide (11) is a, and the yarn storage guide (11) to the guide guide (11). B) the distance to 15) and the guide (1
Assuming that the distance from 5) to the traverse guide (12) is c, the triangle dHa and the triangle eHb are right triangles, so the Pythagorean theorem holds and the equation 1 holds.

[Equation 1] By substituting Equation 1 into L = d + e + c, Equation 2 is obtained, and by transforming Equation 2, the height H of the yarn storage guide (11) is obtained by Equation 3.

[Equation 2]

[Equation 3] At this time, a, b, and c are constants on the device setting, and the maximum traverse length L is also determined by the traverse width W. Therefore, it is obtained by the following formula by the Pythagorean theorem, and by the following formula 4,
Can be calculated.

[Equation 4] Therefore, the height H of the yarn accumulating guide (11) is determined by the expression 3, and the shape of the yarn accumulating guide (11) is an arc connecting the points BB ′ and H.

When the yarn (3) is slid on the yarn storage guide (11) and the guide guide (15), the traverse length (d + e + c) of the yarn (3) at the both ends of the traverse is the maximum traverse. It becomes the same as the swing length L, the yarn storage guide (11) rises in an arc shape as the traverse goes to the center, the yarn (3) is lifted according to the traverse, and the traverse length of the yarn (3) is increased. The yarn (3) is stored in an appropriate amount in a timely manner so that (d + e + c) is always equal to the maximum swing length L.

The method of the embodiment is carried out by using the apparatus having the above-mentioned structure. The embodiment will be described below with reference to FIG. The feed roller (2) interlocking with the drive drum (13) rotates at a slightly higher speed than the peripheral speed of the drive drum (13) at an overfeed rate determined by an experimental value, and is used in a pretreatment process such as fluffing. The yarn (3) with enhanced spinning tension is wound around the feed roller (2) with an appropriate contact length in a state that the yarn (3) is not entangled by the guide roller (4) to achieve an appropriate winding tension. It is adjusted and sent out.

The yarn (3) whose tension is weakened by the feed roller type yarn tension adjusting means (1) is then placed above the fixed guide (9), the yarn storage guide (11) and the guide guide (15). Traverse guide (1
2) Reach the top. Then, a proper traverse angle is formed by the reciprocating motion of the traverse guide (12) around the fixed guide (9), and the traverse guide (12) is wound around the package (14) of the cradle (16) which rotates in contact with the driving drum (13). Taken. In the above process, between the fixed guide (9) and the traverse guide (12), the yarn storage guide (11) designed as described above is installed on the upper part of the cam box (10) together with the guide guide (15). Thread to be wound (3)
The upper part of the yarn storage guide (11) and the guide guide (15)
By reciprocating under the traverse guide (12), the linearized traverse motion is corrected into an arc shape. Therefore, the traverse length of the yarn (3) is stored in a timely manner as much as the reduced length, the traverse length of the yarn (3) is always constant, and the yarn speed of the entire yarn path is stabilized. Therefore, there is no occurrence of "interaction between yarn speed fluctuation and frictional resistance", and the tension of the entire yarn path is extremely stable.

[0019]

The tension adjusting method of the present invention has the following two effects. First of all, it is possible to make a large package in a winding machine such as fluffing, which requires high tension to process a yarn. That is, in the prior art, when the traverse speed becomes high, the tensions of the yarn processing part and the winding part are amplified due to the "interaction between the yarn speed fluctuation and the friction resistance". Although large packaging such as cheese winding could not be performed, according to the tension adjusting method of the present invention, there is no "interaction of yarn speed fluctuation and frictional resistance", so there is no tension amplifying action, and all types It is possible to package a large package. Therefore, the number of times the yarn is fried by a yarn processing machine such as fluffing, which requires a long time for the doffing work because of the complicated yarn setting method, can be greatly reduced. In addition, the large packaging greatly reduces the yarn refill process in the next process, and contributes to the improvement of quality by reducing the number of joints.

The second effect is that the limit of speeding up becomes higher. That is, when the tension adjusting method of the present invention is not used, "interaction between yarn speed fluctuation and frictional resistance" occurs, so even if the bobbin bobbin winding has a traverse speed slower than the winding speed, If the winding speed is increased, the traverse speed is also increased, and "interaction between yarn speed fluctuation and frictional resistance" is generated and the tension is also amplified. Therefore, in a winder, such as a fluffing machine, which requires high tension for thread processing, the limit of speedup is low even with flange bobbin winding, but according to the tension adjusting method of the present invention, Even if the traverse speed is fast, "interaction between yarn speed fluctuation and frictional resistance" does not occur, so that the limit of speeding up can be extremely increased regardless of the winding shape. Further, since the tension fluctuation does not increase even if the speed is increased, the yarn breakage does not increase, and the productivity per person is significantly increased.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of an apparatus for carrying out the method of the present invention.

FIG. 2 is an explanatory diagram showing a main part of the device shown in FIG.

FIG. 3 is an explanatory diagram for analyzing a yarn speed difference caused by a traverse motion.

FIG. 4 is a perspective view showing a feed roller type thread tension adjusting means in a conventional mechanism.

[Explanation of symbols]

 1 Thread tension adjusting means 3 Thread 9 Fixed guide 11 Thread storage guide 12 Traverse guide 13 Drive guide 14 Package

Claims (1)

[Claims] 1. A yarn tension adjusting means (1) of a feed roller type, a fixed guide (9), a yarn accumulating guide (11), a yarn to be wound (3) unwound from a yarn supplying bobbin,
A method for winding a target yarn (3) on a package (14) rotating in contact with a drive drum (13) by sequentially passing through a traverse guide (12) that reciprocates the target yarn (3),
The action surface of the yarn accumulating guide (11) is formed into a curved surface with respect to a horizontal plane, and the tension is applied to the target yarn (3) and traverse to wind it while sliding it in contact with the curved surface. A method for adjusting tension of a winder, characterized by: