JPH03192072A - Traverse variation in thread winding machine and device therefor - Google Patents

Abstract

PURPOSE:To eliminate the change of the winding attitude of a package through the lapse of time, improve releasing performance, and permit the storage for a long period, by carrying out winding by gradually reducing the variation width of the traverse variation by setting the min. traverse width constant in the part from the start of winding to the end. CONSTITUTION:The reciprocating movement of a traverse variation rod 22 is constant, and the engagement position of the center part 17a and the left edge part 17b of a cam lever and the first and second cams 20 and 21 gradually shifts to the cam 21 side from the cam 20 side during the shift of the rod 22. Since this operation is repeated from the start of winding to the end in the traverse variation operation, the min. traverse width in operation is made constant. With a constant width, the turning-back parts at the package edge are formed at the same positions A3 and A3, and even if winding proceeds, a pressing force applied to the inner layer of an upper layer thread does not act horizontally. Further, though a pressing force vertically acts because of the lamination layer of threads, winding is carried out slightly firmly only on the parts A3 and A3, and the change through the lapse of time is not generated. Further, when the traverse variation width is gradually reduced, the winding density in the inclination part of the wound-up package reduces, and the generation of the high ear part phenomenon is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to stretchable yarns such as stretch yarns of false twisted yarns, polyurethane elastic yarns such as spandex, or coated elastic yarns made by coating these elastic yarns with natural fibers, etc. The present invention relates to a traverse variation method and device for winding a strip into a piconic shape.

2. Description of the Related Art In general, a yarn winding machine winds a yarn into a so-called piconical shape in which both end surfaces of a puff cage are inclined.

A traverse variation is performed in which the traverse is successively reduced from the beginning of winding the package, and the regular traverse width is periodically changed by a minute amount from time to time. (
(For example, Japanese Patent Publication No. 49-10627) This is to avoid the selvedge phenomenon where the ends of the package swell up compared to other parts because the yarn is folded back and wound at the ends of the pan cage. It is. At this time, the range of change in traverse variation has conventionally varied from the winding start position B+ B+ to the winding end position B, as shown in FIGS. 12 and 14.
This was done with a constant width y until t Bt.

Problems to be Solved by the Present Invention However, the conventional apparatus cannot handle particularly stretchable yarns such as stretch yarns of false twisted yarns, polyurethane elastic yarns such as spandex, or coated elastic yarns made by coating these elastic yarns with natural fibers, etc. When the strips are rolled up into a piconical package, there is no visible bulging phenomenon at the edges of the package at the beginning of the first roll, but after leaving the puff cage for a few days after it has been rolled up, the package is unwound. As a result, as shown in FIG. 13, there was a tendency for a phenomenon in which the edges of the package swelled to become more prominent.

This is because when winding elastic yarn, the tension fluctuations caused by the traversal motion at the center and ends of the package are larger than in the case of regular yarn, so the package that has been wound up one time will be affected by the tension fluctuations at the center. This is because the edge height phenomenon becomes apparent due to changes in the internal stress of the package as 9 hours pass from the point where the package is soft and the end portion is tightly wound.

For this reason, when such a package is released, thread breakage tends to occur frequently, impeding production efficiency, and the package cannot be stored for a long period of time.

Means for Solving the Problems According to the present invention, the above-mentioned technical problems are solved by taking the following measures. That is, it has a traverse width reduction mechanism that gradually reduces the traverse width from the beginning to the end of winding the package, and a traverse variation mechanism that periodically changes the traverse width by a small amount during winding. When winding yarn into a piconical package with sloped end faces using a winding machine.

The winding device is characterized in that the minimum traverse width when performing traverse variation is kept constant and the width of change in traverse variation is gradually reduced from the start of winding to the end of winding.

Operation When the traverse variation is activated, by keeping the minimum traverse width constant and gradually decreasing the variation width of the traverse variation, the biconical package wound twice will have a higher winding density near the slopes at both ends compared to the conventional one. Since the minimum traverse width is always constant as it becomes smaller.

The folded part is folded back at the same point near the end of the parallel part of the package winding form and is stacked on top of the two winding tubes from bottom to top, so in this part, the sloped part of the other parts and the package However, this tightly wound part blocks the pressing force acting on the central part of the package from the sloped part of the package, making it particularly difficult for elastic yarns to be wound. This reduces changes in internal stress over time, allowing the bag to maintain its rolled appearance as long as it was rolled up.

The unrollability of such a package is extremely good.

Real MBf! 4 An example of an apparatus for carrying out the present invention will be described in detail with reference to the drawings in FIGS. 1 and 3.

Reference numeral 1 denotes a rotating shaft driven by a machine drive source via a suitable transmission means, and a grooved cam 2 having a groove formed on the surface of a cylindrical body is fixed to the rotating shaft. Reference numeral 3 denotes a thread guide having an L-shape having a short axis and a long axis that are substantially perpendicular to each other; The grooved cam 2 reciprocates left and right as the grooved cam 2 rotates.

Reference numeral 5 denotes a slide piece that is integrally attached to the thread guide 3, and the slide piece is attached to the building guide 6.
It is loosely attached to the groove 6a.

The building guide 6 is a rectangular parallelepiped with a groove 6a bored in its side surface, and is rotatably supported by a pin 8 on a bracket 7 fixed to a machine frame 9. Further, in FIGS. 1 and 2, 10 is a take-up roll that serves as a drive source when forming a package using a surface friction drive method, 11 is a cradle that grips the winding tube 12 with both arms, and 13 is the aforementioned A pan cage formed by winding yarn on the surface of the winding tube 12, 14
is a biconical cam with a tapered bent tip.
The biconical cam is integrally fixed to the cradle 11. Reference numeral 15 denotes a cam pin that engages with the biconical cam 14, and the cam pin is a square fixing piece 1 for attaching the cam lever 17 to the lower end of the thin rod 15a.
5b is attached.

Reference numeral 16 denotes a cam pin holder that guides the cam bin 15, and the cam pin holder is fixed to the machine frame 9. 1
7 is a cam lever that has the function of determining the inclination angle of both ends of the piconical package as well as the width of the traverse variation.

The cam lever is connected to the fixed piece 15b of the cam pin 15 by a pin 1B. Furthermore, this cam lever 17
As shown in FIG. 1, the upper part of the left end portion 17b engages with the lower part of the builder guide 6.

- The center part 17a of the cough cam lever is in contact with the first cam 20, and is biased with clockwise rotational force by the spring 19 using this as a fulcrum, so that the builder guide 6
is pressed upward. Therefore, the inclination angle of the builder guide 6 with respect to the horizontal direction is controlled by the cam lever 17.

A first cam 20 engages with the cam lever 17 and serves as its fulcrum, and the first cam has a parallel portion and an inclined portion.
When the cam lever 17 is located in the parallel part, the thread guide 3 is located at the outer end of the traverse width, and when the force lever 17 is located in the inclined part, it is in the position to perform traverse variation. There was a certain time.

21 is a second cam that engages with the cam lever 17;

The cam has an inclined surface that is inclined with respect to the parallel portion of the first cam 20, and when the left end portion 17b of the cam lever 17 is in contact with this inclined surface, the minimum traverse width of the thread guide 3 is It's up to you to decide.

Here, the first cam 20 and the second cam 21 are fixed to a traverse variation rod 22.

It is configured to move left and right together with the traverse variation rod 22.

It should be noted that the horizontal distance between the first cam 20 and the second cam 21 determines the range of change in traverse variation, and this distance is adjustable. Further, the first cam 20 and the second cam 21 may be of integral construction, but in this case, the inclination of the end face of the package is constant.

The traverse variation link rod 22 is driven by a machine drive source via a suitable transmission means so as to reciprocate over a constant width in the left-right direction in FIG.

This horizontal movement of the rod 22 serves as a driving source that determines the operating state of the traverse Balinese silane.

An example of a device for carrying out the present invention is constructed as described above, and its operating state will now be described.

First, to explain the piconical mechanism (gradual reduction mechanism of the traverse width) in which both end faces of the package are inclined, the winding of the package is started by passing the grooved cam 2 through the rotating shaft 1 as shown in FIGS. 1, 3, and 4. When the thread guide 3 rotates, the thread guide 3 performs a so-called traverse movement, which is a reciprocating movement from side to side, via the cam dock 4 that engages with the groove of the grooved cam 2. At this time, the relationship between the cam lever 17 and the first cam 20 is such that the central portion 17a of the cam lever 17 is in contact with the parallel portion of the first cam 2o. On the other hand, the builder guide 6 is rotatably supported by the bracket 7 using a pin 8 as a fulcrum.

It is in a state where a clockwise rotational force is applied by the spring 19. Therefore, the upper part of the left end 17b of the cam lever 17 is engaged with the lower part of the rudder guide 6. Since the cam lever 17 itself is supported by the first cam 20 at its central portion 17a, the spring 19
The right end 17c of the cam lever 17 and the cam pin 15 are pressed against the biconical cam 14.

When the package is wound up in this state, the cradle 11 rotates clockwise about the cradle shaft 11a as shown in FIG. 2 as a fulcrum. Then, the cam pin 15 moves according to the shape of the biconical cam 14. This is because the builder guide 6 is biased with a clockwise rotating force about the pin 8 by the spring 19 shown in FIG.

This is because the cam lever 17 receives a force in a counterclockwise direction using its central portion 17a as a fulcrum, thereby pressing the cam pin 15 upward in FIG. As a result, the horizontal inclination angle of the builder guide 6 gradually changes from being inclined upward to the right in FIG. 4 at the beginning of winding the package to downward to the right in FIG.

As the builder guide 6 tilts from the upward-right position to the downward-right position, the traverse width is reduced from the width of the thread guide 3 reciprocating from side to side shown in Fig. 4 to the width l shown in Fig. 5. Changes to That is, the reason is that the thread guide 3 has an L-shape, and the cam dog 4 that is loosely attached to the base of the thread guide 3 engages with the groove 2a of the groove cam 2, and the cam dog 4 itself has left and right sides. The width of the traverse is always constant. However, the slide piece 5 attached to the short diameter portion of the L-shaped thread guide 3 is engaged with the groove 6a of the builder guide 6 and is restrained by the groove 6a. Therefore, when the inclination angle of the builder guide 6 changes from the upward-rightward state in FIG. 4 to the downward-rightward state in FIG. 5, the L-shaped thread guide 3 itself is , the angle in the vertical direction is tilted by the amount of change in the tilted angle of the builder guide 6. That is, in FIGS. 4 and 5, the thread guide 3 rotates clockwise from the beginning of winding to the end of winding using its base point (attachment part of cam dog 4) as a fulcrum on the left side part, while the thread guide 3 rotates clockwise from the beginning of winding to the end of winding on the left side part. From to the end of the winding, its base point (cam dog 4 installation part)
Rotate counterclockwise using the fulcrum as the fulcrum. Therefore, the traverse width becomes narrower than before.

Next, the traverse variation mechanism will be explained.

1 and 6 to 8, when the traverse variation is activated, first the traverse variation rod 22 is moved in the left direction 2 in FIGS. 1 and 6. The first cam 20 and the second cam 21 also move to the left. Then, the central fulcrum 17a of the cam lever 17 engages with the inclined portion of the first cam 20, resulting in the state shown in FIG. 7.

The fulcrum of the central portion 17a of the cam lever 17 is the first cam 20.
as it moves from the parallel part to the inclined part.

The vertical position of the second cam 21 is lowered, and accordingly, the second cam 21
The left end portion 17b of the cam lever 17 is engaged with the left end portion 17b of the cam lever 17. Therefore, the builder guide 6 rotates clockwise about the pin 8 and tilts downward to the right.

If this builder guide 6 tilts downward to the right.

The traverse width becomes narrower as described above with the traverse width reduction mechanism. Then, the traverse width changes by this narrowing, resulting in so-called traverse variation.

This traverse variation rod 2 is applied to the traverse variation rod 2 in 9 cycles from the beginning of winding to the end of winding.
By activating 2, the traverse width is reduced by a very small amount from the normal width 3 4 .

By the way, let me explain about keeping the minimum traverse width constant when traverse variation is activated.
The left and right reciprocating motion of the traverse variation rod 22 is constant, and this traverse variation rod 22
During the movement, as shown in FIGS. 7 and 8, the engagement position between the center portion 17a of the cam lever 17 and the first cam 20 and the engagement position between the left end portion 17b of the cam lever 17 and the second cam 21 gradually shift. It changes from the first cam 20 side to the second cam 21 side. When the traverse variation rod 22 is at the leftmost position, the cam lever 1
The upper end of the left end 17b of the cough cam lever 17 is in contact with the builder guide 6, and the lower end of the left end 17b of the cough cam lever 17 is in contact with the second cam 21. As a result, the horizontal inclination angle of the builder guide 6 is determined by the shape of the left end portion 17b of the cam lever 17 and the inclined surface of the second cam 21.

In this way, this operation is repeated from the beginning of the second winding to the end of winding when the traverse Balinese Silon is activated, so that the minimum traverse width when the traverse variation is activated is constant.

By the way, if the minimum traverse width is kept constant during the traverse variation operation, the folded portion at the end of the package will be at the same location A3°A3 from the beginning of winding to the end of winding, as shown in FIGS. 9 and 11. Even as winding of the package progresses, the positions of A, , A, within the first yarn layer do not change, so at this position, no pressing force on the inner layer of the upper layer yarn at the time of turning acts in the horizontal direction.

On the other hand, in the vertical direction, as the yarns are stacked, a pressing force acts from the upper layer to the lower layer, but at the same location A3. Since it is acting with As, only that part is wound somewhat more tightly than the other parts in the horizontal direction. Even if the tightly wound portion is further pressed from above, no change will occur over time. However.

If the width of change in traverse is constant as in the conventional case, the 12th
As shown in the figure and FIG. 14, as the package is wound up, the pressing force exerted by the upper layer yarn on the inner layer at the folded portion of the yarn is not at the same location but moves from B3 to 84 along the slope of the package 5.

For this reason, at the folded end (between B3 and B4), this moving pressing force acts on the soft part of the inner layer in the center of the package. induces a high phenomenon. However.

When the minimum traverse width during traverse variation operation is kept constant as in the case of the present invention.

If the folded portion (A3. Therefore, the pressing force that acts from the outer sloped part toward the center of the puff cage is blocked by this hard part, and even with stretchable threads such as polyurethane elastic threads, the selvage height phenomenon over time is avoided. Furthermore, if the width of change in traverse variation is gradually reduced from the beginning of winding to the end of winding, the winding density of the two-wound package at the inclined part will be lower (because the amount of yarn laminated is smaller than before). As a result, changes in internal stress over time due to the pressing force acting from the ends of the package toward the center become smaller, and in this respect as well, the occurrence of the selvedge phenomenon is avoided.

Effects As described above, the present invention can be used when winding a yarn into a piconical package with both end faces inclined.

When performing a traverse variation, the minimum traverse width is kept constant from the beginning of the 9th roll to the end of the 9th roll, and the range of change in the traverse variation is gradually reduced as the 9th roll is raised. Even with stretchable yarn, the winding density at the edges of the pan cage is reduced, and the internal stress acting from the edges of the package to the center can be reduced, eliminating changes in the winding shape of the package over time. However, even after the package has been left for several days, it has an extremely good unrolling property, and has the effect of allowing the package to be stored for a long period of time.

In addition, the device can be provided by partially modifying a conventional device and adding simple parts, and the equipment cost is also low.

[Brief explanation of drawings]

FIG. 1 is a schematic plan view of the main parts showing an example of an apparatus for implementing the present invention, FIG. 2 is a side view of the main parts including a partial cross section of FIG. 1, and FIG. 4 to 8 are explanatory diagrams showing the operating state of the device of the present invention, FIG. 9 and FIG. 10 are explanatory diagrams of the shape of the package rolled up by the device of the present invention, and FIG. Figures 12 and 13 are explanatory diagrams of the traverse variation pattern, and are explanatory diagrams of the shape of the package rolled up by the conventional device.
FIG. 14: [This is an explanatory diagram of the pattern of the next traverse variation. Rotating shaft groove cam thread guide cam dog slide piece builder guide 9 11 --- Cradle 12 --- Winding tube I3 --- Package 14 --- Biconical cam 15・・・・・−・・Cam bin 17・・・・−・−・Cam lever 20−・・−・−・First cam 21・・・−・・−Second cam 22・・・−−−−− ) 5 Hearth Variation Rondo 0 Figure 9 Figure 10 Figure 12 Figure 11 Figure 2 2 114 Figure 2 2

Claims (1)

[Claims] 1. From the beginning to the end of winding the package,
This winding machine has a traverse width reduction mechanism that gradually reduces the traverse width and a traverse variation mechanism that periodically changes the traverse width by a small amount during winding, and winds the yarn into a biconical package with both end faces sloped. When winding the winding, the minimum traverse width when performing traverse variation is kept constant from the start of winding to the end of winding, and the width of change in traverse variation is gradually decreased. A traverse variation method for a winding machine. 2. A thread guide 3 having a cam dog 4 that engages with a grooved cam 2 serving as a drive source for traverse motion, a built-in slide piece 5 that restrains the movement of the thread guide 3, and the thread guide 3, and its inclination. A builder guide 6 that determines the traverse width of the thread guide 3, a cam lever 17 that controls the inclination of the builder guide 6 by changing its support position, and a cam pin 15 connected to the cam lever 17 engage with each other. a traverse width reduction mechanism consisting of a cradle 11 that rotates as the winding diameter of the package increases and a biconical cam 14 that is integrally attached; and a first traverse width reduction mechanism that is integrally attached to a traverse variation rod 22 that separately reciprocates. The winding machine is equipped with a traverse variation mechanism that periodically changes the traverse width by a minute amount by changing the support position of the cam lever 17 when the cam 20 engages with the cam lever 17 of the traverse reduction mechanism. A second cam 21 is integrally attached to the traverse variation rod 22 in addition to the first cam 20 that determines the variation width, and the support position of the cam lever 17 that controls the inclination of the builder guide 6 when the traverse variation is activated is set to the second cam 21. A traverse variation device for a yarn winding machine, characterized in that the inclination of the builder guide 6 is made constant by shifting from the first cam 20 to the second cam 21.