JP2002284448A - Method for winding synthetic fiber, and winding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To restrict yarn quality change on a package surface layer, to dispense with a removing process to surface yarn, to achieve high-level change success ratio, and to dispense with a tail processing. SOLUTION: In a process of moving a yarn-wound package 8 from a winding position to a stand-by position, rotation of a turret member 10 is stopped before the yarn gets in contact with an empty bobbin 11, where an upper yarn collecting guide 15 and a lower yarn collecting guide 14 are synchronized to actuate, so that yarn is collected to a yarn holding part on the empty bobbin 11 without stopping traversing yarn. Simultaneously, by action of at least one of the upper yarn collecting guide 15, the lower yarn collecting guide 14, and the turret member 10, the yarn is wound on a circumferential surface of the empty bobbin 11 to change the yarn.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a turret type winder for continuously winding a yarn.

[0002]

2. Description of the Related Art When winding a synthetic fiber yarn spun from a spinning device, a turret type winder in which the yarn is wound alternately by two spindles is mainly used. Are described in, for example, JP-A-63-92578, JP-A-1-231177, and JP-A-4-759.
No. 75, and a method described in JP-A-8-12191 is known. In these methods, by improving the yarn path bending at the time of yarn switching or by reducing unnecessary contact with the peripheral surface of the empty bobbin, the switching success rate is improved, and the winding package surface layer is improved. Although the yarn quality is reduced, the yarn is temporarily stopped and supported with the yarn removed from the traverse device before the yarn switching. For this reason, a surface bunch, which is an unnecessary rod winding in which the yarn is not traversed, is inevitably formed on the package surface layer. When the surface bunch is formed, the winding diameter rapidly increases in a short time when it is formed, thereby increasing the winding tension. Therefore, the yarn quality is often changed as compared with a portion where a normal yarn layer is formed. Also, even when the yarn quality is at a usable level, when the package is sent to the next process such as false twisting, weaving, knitting and the like and the yarn is unwound, unwinding different from a normal yarn layer is performed. Due to the tension, it is a cause of quality abnormality and thread breakage. Therefore, there is a problem that an operation of stripping it is necessary, and that waste is generated.

Further, in the above method, even after the yarn is switched, the yarn is supported against the force of moving toward the center of the traverse and is temporarily stopped. In addition, a tail bunch, which was a stick wound, was also formed. Because this tail bunch is unnecessary thread,
There is a problem that a tail treatment for removing this is required in a later step, and a work load corresponding to this is required.

[0004] On the other hand, as a method of not forming such a surface bunch and a tail bunch, Japanese Patent Publication No. 61-547.
A method as described in Japanese Patent Publication No. 11 has been proposed.

[0005] This switching method is schematically shown in a front view, FIGS.
This will be described with reference to a schematic side view and FIG. First, FIG.
8 shows a normal winding state, in which the yarn supplied from the upper spinning machine (not shown) is centered on the swinging fulcrum guide 2,
The package 6 is traversed by the traverse device 3, fed by the contact pressure roll 4, and wound by the bobbin tightened by the spindle 5 at the winding position. As for the guide for guiding the yarn at the time of switching, first, the yarn pulling guide 7 for pulling the yarn in the direction of the yarn gripping portion at the time of switching is located close to the side of the contact pressure roll 4.
There are two yarn path regulation guides 9 that regulate the thread path leading to
These are fixed on the turret member 10 at positions symmetrical to each other with respect to a line connecting the centers of the two spindles and at positions where they do not come into contact when the package is wound up. When the package 6 is wound up to a predetermined amount, switching starts, the spindle 5 at the standby position starts rotating, and when the rotation speed reaches a predetermined speed, the turret member 10 is rotated in a direction opposite to the spindle rotation direction. At 180 degrees to the state shown in FIG. Since the spindle 5 is attached to the turret member 10, the winding package 8 at the winding position moves toward the standby position, and the empty bobbin 11 at the standby position moves toward the winding position. At this time, the yarn is wound up in the wound package 8 while still traversing while being in contact with the peripheral surface of the empty bobbin. Next, as shown in FIG. 30, the yarn moving guide 7 is operated in the direction parallel to the spindle axis to move the yarn toward the yarn gripping portion 12 at the end of the empty bobbin. At the slant groove 13 provided at the side, and acts to keep the yarn path of the shifted yarn parallel to the yarn gripping portion 12, and finally the yarn is gripped by the yarn gripping portion 12, and the yarn is switched. Can be The yarn immediately after the switching becomes the yarn path shown by the broken line in FIG. 29, automatically disengages from the upper yarn pulling guide 7, moves toward the traverse center, and starts normal winding.

[0006] Finally, the yarn pulling guide 7 is returned to the original position, and the switching is completed.

However, in this method, not only does the yarn traverse before the yarn switching but also contacts the peripheral surface of the empty bobbin, but the yarn path leading to the winding package 8 is extremely adjusted by the yarn path guide 9. Because of the bending and switching, a large rubbing action and accompanying frictional force act here to make the yarn tension on the downstream side excessive, so that the yarn quality of the surface layer of the wound package greatly changes. Furthermore, a large frictional force acts in the traverse direction at the bent portion, and the winding position is extremely close to the center, so that it is necessary to remove the surface yarn. In addition, since the yarn tension upstream of the bent portion decreases, the yarn is easily reversely wound on the godet roll that supplies the yarn to the winding machine, and the switching success rate cannot be maintained high. From the time until the moment of switching, it is common to increase the winding speed of the winding package from the normal speed and increase the winding tension in advance to compensate for the decrease in tension. However, there is a problem that the yarn quality of the surface layer is incompatible with the improvement of the switchability because the rubbing action of the rubber is increased and the yarn quality is further largely changed.

[0008]

As described above, according to the conventional techniques, the following two problems associated with the switching of the yarn, the change in the yarn quality of the package surface layer and the formation of the surface bunch can be solved at the same time. Did not. Therefore, three simultaneous solutions, including the formation of a tail bunch, which is another problem, could not be achieved. Therefore, an object of the present invention is to firstly provide a winding method capable of suppressing a change in the yarn quality of the package surface layer occurring at the time of switching and not forming a surface layer bunch, thereby eliminating the need for a surface yarn stripping process. By doing so, the second problem is to provide a winding method that, in addition to the first problem, eliminates the need for tail treatment by not forming a tail bunch, and can largely omit the end yarn processing work of the package as a whole. A third object is to provide a winding method capable of achieving a high level of switching success rate while satisfying the first and second objects.

It is another object of the present invention to provide a winding device that solves the above problem.

[0010]

In order to solve this problem, the yarn winding method according to the present invention employs a swing fulcrum guide, which serves as a fulcrum for traversing the yarn, and traverses right and left before winding the yarn. A traverse device, a contact pressure roller that abuts on the wound yarn and applies a predetermined surface pressure, and two spindles that alternately wind the traversed and fed yarn. A turret member for mounting two spindles and rotating them alternately between a winding position and a standby position, and an empty package tightened to the other spindle from a winding package tightened to one spindle. When switching to bobbins,
An upper yarn pulling guide that removes the yarn from the traverse device on the upstream side with respect to the yarn running direction across the empty bobbin and moves the yarn toward the yarn gripping portion on the empty bobbin, and on the downstream side, the yarn is also moved on the empty bobbin. Using a yarn winding device including a lower yarn pulling guide that moves in the direction of the yarn gripping portion and a yarn winding guide that controls the yarn path of the yarn from the lower yarn pulling guide to the winding package. In the process of switching the winding package from the winding position to the standby position, the rotation of the turret member is stopped before the yarn comes into contact with the empty bobbin, and then the lower yarn pulling guide and the yarn path By moving the regulating guide between the empty bobbin and the winding package, and then operating the upper and lower thread guides in synchronization, the thread can be emptied without stopping the thread during traverse. Bo To the thread gripper on the thread so that it is substantially parallel to the thread gripper, and at the same time, at least one of the upper thread guide, lower thread guide, and turret Thus, the yarn is switched around by winding the yarn around the empty bobbin. Further, in addition to the above-described means, immediately after the yarn switching, the yarn gripping point on the empty bobbin shifts in the empty bobbin rotation direction which is the opposite direction to the yarn traveling direction, and the yarn is automatically moved from the upper yarn pulling guide. The thread is detached, and a normal traverse is started. Further, in addition to the above-described means, the operation of winding the yarn and the operation of winding the yarn around the empty bobbin can be performed by using a member in which both the upper and lower yarn guides are fixed together in the longitudinal direction of the spindle shaft and the spindle. The movement is performed at a time by moving in a direction oblique to both directions perpendicular to the axis.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
This will be described using FIG. 24 as an example.

FIG. 1 is a schematic front view of a turret type multi-filament winding device according to an embodiment of the present invention, and FIG. 2 is a schematic side view thereof. 3 to 9 are schematic front views showing the automatic switching operation from the winding package to the empty bobbin in a more simplified and time-series manner, and FIGS. 10 to 12 are schematic side views thereof.

First, FIG. 3 shows a normal winding state, in which a yarn supplied from an upper spinning machine (not shown) is traversed by a traverse device 3 around a swing support guide 2.
It is fed by a contact pressure roll 4 and wound by a bobbin tightened to a spindle 5 at a winding position to form a package 6. When the package 6 is wound up to a predetermined amount, the spindle 5 at the standby position starts rotating, and when the rotation speed reaches a predetermined speed, the turret member 10 starts rotating in a direction opposite to the spindle rotation direction. Then, the winding package 8 at the winding position is moved toward the standby position, and the empty bobbin 11 at the standby position is moved toward the winding position, as shown in FIG. Stop at the halfway stop position.

Next, as shown in FIGS. 5 and 10, the lower yarn pulling guide 14 and the yarn path regulating guide 9 are moved between the empty bobbin 11 and the winding package 8. At this time,
As shown by the broken line in FIG. 10, the yarn is still traversed,
It is wound up by the winding package 8.

Next, as shown in FIGS. 6 and 11, the upper thread guide 15 and the lower thread guide 14 are operated in synchronization with each other so that the thread in the traverse is not stopped and the thread is moved in the direction parallel to the spindle axis. The yarn is moved so as to be substantially parallel to the yarn gripping portion 12 up to the yarn gripping portion 12 on the bobbin, and at the same time, the turret member 10 is rotated to move the yarn onto the peripheral surface of the empty bobbin 11. As a result, the yarn is fixed to the yarn gripping portion 12, and the yarn is cut between the wound package 8 and the empty bobbin 11 on the downstream side of the empty bobbin 11, and the yarn is switched. Next, as shown in FIGS. 7 and 12, as the upper yarn pulling guide 15 returns to the original position, the yarn is again captured by the traverse device 3 and normal traverse is started.

Next, as shown in FIG.
4, and return the yarn path regulation guide to the original position.

Next, as shown in FIG.
Is turned again to start the winding, the bobbin 16 reaches the normal winding position, and the normal winding is started again.

In the above embodiment, the operations of the upper yarn guide 15 and the lower yarn guide 14 are synchronized at the time of yarn switching.
Furthermore, the reason why the winding operation is performed simultaneously is to suppress the deterioration of the yarn quality of the package surface layer and to minimize the formation of the surface bunch. That is, unless the operations of the upper yarn guide 15 and the lower yarn guide 14 are synchronized, one of the guides completes the operation first and stops, and then the other guide reaches the yarn gripper 12. Then, the surface bunch is wound until the yarn is switched, and if the winding operation is not performed simultaneously and the winding is performed first, the yarn traverses and the empty bobbin 11 comes into contact with the peripheral surface. If the yarn is seriously damaged and fuzz is generated on the surface of the package, and if the yarn is moved first, the winding operation starts after the yarn movement is completed, and the yarn is wound enough for switching. The yarn is stopped until it is switched by contacting the peripheral surface of the empty bobbin 11 by an amount, and a surface bunch is formed.

In order to prevent the formation of the surface bunch, it is necessary to sufficiently increase the yarn pulling speed. As can be seen from FIG. 11, the lower thread guide 14
11 is supported within the range of the outer circumference of the winding package 8 by the yarn path regulating guide 9, so that the yarn pulling guide 15 passes over the yarn path regulating guide 9 when viewed from the direction of FIG. The movement of the yarn under the yarn path regulation guide 9 stops during the time from when the yarn reaches the yarn gripping portion 12, and the surface bunch is slightly wound. However, in practice, if the speed of the yarn pulling is sufficiently high, the yarn path going up from the lower yarn pulling guide 14 to the package 8 in the process of performing the yarn pulling has an oblique shape with a delay as shown in FIG. The time required for the yarn to reach the yarn path regulation guide 9 is also delayed, and the time required for winding the surface bunch is also short. The amount can be so small that there is no problem in the operation. As a guide of the yarn pulling speed, it is sufficient that the yarn pulling mechanism moves smoothly by visual observation within an adjustment range when the yarn pulling mechanism is driven by a general air cylinder. In addition, the slightly wound surface bunch is a good mark because it defines the position of the yarn end when searching for the yarn end of the surface layer of the wound package in the next step.

Further, in the above embodiment, the lower yarn pulling guide 14 is wound up and the yarn path regulating guide 9 is inserted from the empty bobbin 11 side from the package 8 side, but if each plays a role. It may be inserted from either side.

In particular, as a method of not forming a tail bunch, as shown in FIG. 14, the upper yarn pulling guide 15 is provided between the contact pressure roll 4 and the empty bobbin 11 and the yarn path immediately after switching shown by the broken line. It is good to provide in the position which does not cross.
Thereby, at the next moment of the switching, the empty bobbin 11 in which the yarn gripping point on the empty bobbin 11 is in the opposite direction to the running direction of the yarn.
With the shift in the rotation direction, the thread is automatically released from the upper thread pulling guide 15 and moves toward the center of the traverse without forming a tail bunch, thereby starting a normal traverse.

The halfway stop position when the turret member 10 is rotated at the time of switching is changed in accordance with the winding diameter of the winding package 8, and when the turret member 10 is rotated, the first stop position is changed. It is most preferable that the position immediately before the position where the peripheral surface of the empty bobbin 11 comes into contact with the yarn is minimized, since the bending of the yarn can be minimized. Since a device for detecting information and a device for stopping the turret operation at an arbitrary position based on the information are required, and equipment costs are increased, the middle yarn stop guide 14 is set uniformly regardless of the winding diameter.
Alternatively, the winding direction restricting portion 1 as shown in the example of the lower yarn pulling guide 14 in FIG.
7 may be provided to adapt the yarn path to a change in the winding diameter by bending the yarn path. (Hereinafter, the package in which the bobbin is wound with an extremely thin thread is referred to as an ultra-thin package 19, and the package in which the bobbin is wound to the maximum diameter of the winding machine equipment specification is referred to as a large-diameter package 18. The yarn path leading to the thin package 19 is indicated by a broken line. That is, as shown in FIG. 16, the halfway stop position is the position where the peripheral surface of the empty bobbin 11 contacts the yarn when the wound package is the large-diameter package 18. 17 and then, as shown in FIG.
By limiting the winding angle to
If the wound package is an ultra-thin package 19, the yarn path may be bent, or, as in the case of the large package 18 as shown in FIG.
Next, as shown in FIG. 18, the yarn path in the case of the large-diameter package 18 is bent by restricting the yarn in a direction in which the winding angle of the yarn around the empty bobbin 11 is reduced by the winding direction restricting portion 17. Then, as shown in FIG. 19, the turret member 10 may be rotated again to reach the halfway stop position immediately before the peripheral surface of the empty bobbin 11 comes into contact with the yarn. However, the larger winding diameter is usually the desired winding diameter, and the smaller winding diameter is specified because the winding machine has just started operation and has no product value, or thread breakage occurs on the way. In many cases, it is a low-value package in which the winding could not be performed for the amount of time, and it is better to bend the yarn path in the case of the ultra-thin package 19 as shown in FIG. Than bending the thread path in the case of
The large-diameter package 18 is preferable without deteriorating the surface yarn quality.

As means for removing the yarn from the traverse device 3 when pulling the yarn, there is a problem in the case of the traverse device 3 of the type which can be released simply by moving the upper yarn pulling guide 15 in parallel with the traverse direction. However, the yarn must be moved in a direction perpendicular to the traverse direction. For example, FIG. 20 is a top view of the traverse device 3 and a type in which one traverse guide 20 as shown here reciprocates. As shown in FIG. 20, the upper yarn pulling guide 15 has a tapered portion 21 and is moved in the traverse direction A to remove the yarn in the direction B perpendicular to the traverse direction. Alternatively, the yarn removing plate 22 is provided as shown in FIG. 21, and the yarn is removed in the direction perpendicular to the traverse direction by moving from the broken line to the solid line. Soon stop, it may be immediately actuates the upper yarn shift guide 15 in the traverse direction parallel direction.

The means for winding the yarn around the peripheral surface of the empty bobbin 11 is preferably performed by rotating the turret member 10 as shown in the above embodiment, since it is possible to reduce the bending of the yarn path. FIG. 15 shows one or both of the upper and lower thread guides 15 and 14.
The winding direction regulating portion 17 as shown in the example is provided, and the guide provided with the winding direction regulating portion 17 is moved in the direction approaching the empty bobbin 11 at the same time as the yarn pulling direction, so that the yarn is moved to the empty bobbin. 11 may be wound. Further, as shown in FIG. 22 which is a schematic front view of the yarn pulling and winding operation, and FIG. 23 shows a detailed view near the empty bobbin, the upper yarn pulling guide 15 and the lower yarn pulling guide 14 are fixed to one connecting member 23. And the connecting member is defined as a spindle shaft center longitudinal direction C,
In the direction E perpendicular to the spindle axis and oblique to the direction D approaching the empty bobbin, only one linear motion mechanism 24 is provided.
Also, the upper side yarn guide 15 moves
The three movements of the lower yarn guide 14 and the winding by the lower yarn guide 14 can be reliably synchronized, and the apparatus configuration can be simplified, which is preferable. 22 and 23 show a case where the winding direction regulating portion 17 is provided on both the upper and lower yarn pulling guides.

Further, in the above embodiment, the turret member 10 is rotated after the yarn is switched, the bobbin is started to reach a regular winding position and the normal winding is started again. When the yarn switching is completed, the bobbin that has begun to wind has already reached the normal winding position based on the turret member 10, the contact pressure roll 4, and the swinging fulcrum guide 2, and their respective sizes and relative positional relationships. For example, if the state at the moment of switching is as shown in FIG. 24 and the position of the empty bobbin 11 is already at the normal winding position in this state, it is not necessary to rotate the turret member 10 after switching.

[0026]

The present invention will be described below in more detail with reference to specific examples. Note that the present invention is not limited to such an embodiment.

The yarn was actually wound up under the following conditions and evaluated.

<Winding conditions> Type of yarn: Polycapramide nylon filament yarn (5
0 denier, 17 filaments) Winding device: Turret type winding device (8 yarn winding) Thread bobbin: Paper tube provided with yarn gripping groove at outer peripheral end (140 mm outer diameter) Traverse device: 6 sheets Type with rotating blades arranged on three axes Winding speed: 4000 m / min Package diameter: 250 mm, 370 mm (2 conditions) Speed-up rate at switching: 0.3%, 4% (changed according to switching method) Switching method : Five representative switching modes "I to E" of the present invention shown in the embodiments of the present invention, and a switching mode "F" using the prior art. "I-E" was used for Examples 1-10, and "F" was used for Comparative Examples 1 and 2 (for details, see the description below).

Here, the package diameter is set to 250 mm and 37 mm.
The reason why the two conditions of 0 mm are set is that the yarn bending accompanying the switching differs depending on the winding diameter, and the influence on the yarn quality also changes accordingly. The diameter was selected because the maximum product diameter of the winder used in the evaluation was 370 mm and the minimum product diameter was 250 mm.
mm.

The speed-up rate at the time of switching means that the switching operation is started in order to prevent the yarn from being reversely wound around the godet roll that supplies the yarn to the winding machine due to the decrease in tension accompanying the normal switching and the switching from failing easily. From then until the moment of switching, the winding speed of the winding package is increased from the normal speed, and the winding tension is increased in advance to compensate for the decrease in tension. Point to.

<Evaluation Items> (1) Presence or absence of surface bunch It was visually determined whether or not the rod winding portion could be confirmed.

(2) 15% stress of package surface yarn The 15% stress is defined as follows.
The elastic force generated when a 15% strain is applied is expressed in grams. A rise in tension and abrasion of the yarn occur with the yarn switching, but under these influences, the 15% stress has a tendency to increase, which is an index indicating a change in yarn quality. When measuring, a tensile tester “Tensilon Universal Tester RTC-1210” manufactured by Orientec Co., Ltd.
Using "A", in order to avoid the part where the yarn was cut, a distance of 1.5 m from the yarn end of the package surface layer was removed, and a yarn having a length of about 50 cm was collected therefrom. did. The number of measurements was 1 for each of the 8 packages.
Each time, the total was eight times.

(3) Presence or absence of a tail bunch It was visually determined whether or not the rod winding portion could be confirmed.

(4) Switching success rate The switching success rate was determined to be 100 times when the switching was successful, and when all eight yarns were successful, the switching was successful.

<Description of Switching System>"Switching System A" In the embodiment of the invention, the switching operation is described in chronological order with reference to FIGS. 3 is provided at the upstream portion, the stop position in the middle of the rotation of the turret member 10 is changed according to the winding diameter, and the lower
This is a method in which the yarn path regulation guide 9 is inserted from the empty bobbin 11 side from the side, and the winding of the yarn is performed by rotating the turret member 10. The speed increase rate at the time of switching is 0.3%.

"Switching method b" In the switching method of the first embodiment, as shown in FIG. 14, the upper thread pulling guide 15 is inserted between the contact pressure roll 4 and the empty bobbin 11 at a position that does not cross the thread path after switching. It is a method that has been changed to a form that does The speed increase rate during switching is 0.
3%. "Switching method C" The switching method of the second embodiment is described in FIGS.
3, the upper and lower thread guides 15 and 14 are fixed to one connecting member 23, and
In the longitudinal direction C of the spindle axis and a direction E perpendicular to the spindle axis and oblique to the direction D approaching the empty bobbin.
In this method, the yarn is moved and wound by a single linear motion mechanism 24 so that the yarn pulling and winding are performed at once.
The speed increase rate at the time of switching is 0.3%.

"Switching method d" In the switching method of the second embodiment, the rotation of the turret member 10 is stopped halfway at only one position corresponding to the case of the large-diameter package 18 as shown in FIG. The lower thread pulling guide 14 provided with the winding direction regulating portion 17 is wound up and inserted from the package side,
This is a method in which the yarn path in the case of the ultra-thin package 19 is changed to be bent. In FIG. 25, the package diameter is 250
The outer diameter of the package in mm and the yarn path leading to the package are indicated by alternate long and short dash lines. The speed increase rate during switching is 0.
3%.

The switching method according to the second embodiment is different from the switching method according to the second embodiment in that the rotation of the turret member 10 is stopped at only one position corresponding to the case of the large-diameter package 18 as shown in FIG. The yarn path regulating guide 9 provided with the winding direction regulating section 17 is inserted from the empty bobbin side 11 to bend the thread path in the case of the large-diameter package 18, and then the turret member 10 is turned again as shown in FIG. In this method, the empty bobbin 11 is moved to a stop position immediately before the peripheral surface of the empty bobbin 11 comes into contact with the yarn. In FIG. 27, the package diameter is 250
The outer diameter of the package in mm and the yarn path leading to the package are indicated by dashed lines. The speed increase rate at the time of switching is 0.3
%. "Switching method F" is a method in which a surface bunch and a tail bunch described in Japanese Patent Publication No. 61-54511 are not formed. The speed increase rate at the time of switching is 4%.

Table 1 shows the above evaluation results.

[0040]

[Table 1] The presence or absence of a surface bunch was not seen in any of the examples. For 15% stress, package surface layer is 100m
The yarn in the normal wound state before the stripping and switching operation was started was taken out, and the 15% stress was measured. As a result, it was 75 g. It was found that there was no change in the quality, and there was a slight change in the yarn quality in the case of Example 10, but at a small level. On the other hand, in the case of Comparative Examples 1 and 2, the value is extremely large. In Comparative Example 1, the yarn quality is extremely changed while the winding diameter is slightly smaller when the winding diameter is smaller. all right. Regarding the presence or absence of a tail bunch, a tail bunch was observed in Examples 1 and 2, but was not observed in other Examples and Comparative Examples. The switching success rate was 100% in all the examples, while the comparative examples 1 and 2 were as low as 97 and 95%.
From this, according to the winding methods of Examples 1 to 9, stripping of the surface yarn of the package is unnecessary, and according to Example 10, sufficient stripping of the yarn is not required in the next step depending on how the yarn is used. Further, in Examples 3 to 10, since there was no tail bunch, it was found that both the tail treatment and the removal of the surface yarn were unnecessary. On the other hand, according to Comparative Examples 1 and 2, it was found that the surface yarn had to be removed.

[0041]

According to the method and apparatus for winding a synthetic fiber of the present invention, it is possible to suppress the change in the yarn quality of the package surface layer that occurs at the time of switching and to eliminate the surface layer yarn by eliminating the surface bunch. And a high level of switching success rate can be achieved. Further, a preferred embodiment of the present invention eliminates the need for tail treatment by not additionally forming a tail bunch,
As a whole, the end yarn processing operation of the package can be largely omitted.

[Brief description of the drawings]

FIG. 1 is a schematic front view of a multi-thread winding device of the present invention.

FIG. 2 is a schematic side view of the multifilament winding device of the present invention.

FIG. 3 is a schematic front view illustrating a yarn switching operation of the yarn winding device of the present invention.

FIG. 4 is a schematic front view showing a yarn switching operation of the yarn winding device of the present invention.

FIG. 5 is a schematic front view showing a yarn switching operation of the yarn winding device of the present invention.

FIG. 6 is a schematic front view showing a yarn switching operation of the yarn winding device of the present invention.

FIG. 7 is a schematic front view showing a yarn switching operation of the yarn winding device of the present invention.

FIG. 8 is a schematic front view showing a yarn switching operation of the yarn winding device of the present invention.

FIG. 9 is a schematic front view illustrating a yarn switching operation of the yarn winding device of the present invention.

FIG. 10 is a schematic side view showing a yarn switching operation of the yarn winding device of the present invention.

FIG. 11 is a schematic side view showing a yarn switching operation of the yarn winding device of the present invention.

FIG. 12 is a schematic side view showing a yarn switching operation of the yarn winding device of the present invention.

FIG. 13 is a schematic side view showing a yarn switching operation of the yarn winding device of the present invention.

FIG. 14 is a schematic front view showing a yarn switching operation of the yarn winding device of the present invention.

FIG. 15 is a schematic diagram of the vicinity of a portion in which a winding direction regulating portion is provided in a lower yarn pulling guide.

FIG. 16 is a schematic front view showing a yarn switching operation of the yarn winding device of the present invention.

FIG. 17 is a schematic front view showing a yarn switching operation of the yarn winding device of the present invention.

FIG. 18 is a schematic front view showing a yarn switching operation of the yarn winding device of the present invention.

FIG. 19 is a schematic front view showing a yarn switching operation of the yarn winding device of the present invention.

FIG. 20 is a schematic top view of a traverse device that reciprocates one traverse guide.

FIG. 21 is a schematic front view showing a yarn switching operation of the yarn winding device of the present invention.

FIG. 22 is a schematic front view showing a yarn switching operation of the yarn winding device of the present invention.

FIG. 23 is a schematic view of an upper thread pulling guide and a lower thread pulling guide fixed to one connecting member.

FIG. 24 is a schematic front view showing a yarn switching operation of the yarn winding device of the present invention.

FIG. 25 is a schematic front view showing a yarn switching operation of the yarn winding device of the present invention.

FIG. 26 is a schematic front view showing a yarn switching operation of the yarn winding device of the present invention.

FIG. 27 is a schematic front view showing a yarn switching operation of the yarn winding device of the present invention.

FIG. 28 is a schematic front view illustrating a yarn switching operation according to a conventional technique.

FIG. 29 is a schematic front view showing a yarn switching operation according to a conventional technique.

FIG. 30 is a schematic side view showing a yarn switching operation according to a conventional technique.

[Explanation of symbols]

 1. Yarn winding device 2. Swing point guide 3. Traverse device 4. Contact pressure roll 5. Spindle 6. Package 7. Thread guide 8. Rolled up package 9. Thread path regulation guide 10. Turret member 11. Empty bobbin 12. Yarn gripping part 13. Slanted groove 14. Lower thread guide 15. Upper thread pulling guide 16. Winding bobbin 17. Winding direction regulating part 18. Large diameter package 19. Ultra-thin package 20. Traverse guide 21. Tapered part 22. Thread release plate 23. Connecting member 24. Linear motion mechanism

Claims (6)

[Claims] 1. A swing fulcrum guide serving as a fulcrum for traversing a yarn, a traverse device for traversing the yarn left and right before winding the yarn,
A contact pressure roller for applying a predetermined surface pressure by contacting the wound yarn; two spindles for alternately winding the traversed and fed yarn; and the two spindles When switching from a turret member that rotates them alternately to a winding position and a standby position and a yarn from a wound package tightened to one spindle to an empty bobbin tightened to another spindle. Then, the yarn is removed from the traverse device on the upstream side with respect to the yarn running direction with the empty bobbin interposed therebetween, and an upper yarn pulling guide for moving the yarn toward the yarn gripping portion on the empty bobbin, and the yarn is also emptied on the downstream side. A lower yarn pulling guide that moves in the direction of the yarn gripping portion on the bobbin, and a yarn winding device that includes a yarn path regulating guide that regulates the yarn path of the yarn from the lower yarn pulling guide to the winding package;
In switching the yarn, in the process of moving the winding package from the winding position to the standby position, the rotation of the turret member is stopped before the yarn contacts the empty bobbin,
By moving the lower thread guide and the thread path regulation guide between the empty bobbin and the winding package, and then operating the upper thread guide and the lower thread guide in synchronization,
Without stopping the yarn in the traverse, the yarn is pulled up to the yarn gripping portion on the empty bobbin so as to be substantially parallel to the yarn gripping portion, and at the same time, the upper yarn pulling guide, A method for winding a synthetic fiber, wherein the yarn is switched by winding the yarn around an empty bobbin peripheral surface by operation of at least one of a lower yarn pulling guide and a turret member. 2. A yarn gripping point on an empty bobbin shifts in a rotation direction of an empty bobbin opposite to a running direction of the yarn immediately after the yarn switching, and the yarn is automatically moved from the upper yarn pulling guide. 2. The synthetic fiber winding method according to claim 1, wherein the traverse is started and a normal traverse is started. 3. The operation of winding the yarn and the operation of winding the yarn on the peripheral surface of the empty bobbin are performed by moving a member having both the upper and lower yarn guides fixed thereto in a direction perpendicular to the longitudinal direction of the spindle axis and the spindle axis. 3. The method according to claim 2, wherein the movement is performed at a time by moving in a direction oblique to both directions.
A method for winding a synthetic fiber according to the above. 4. A swing fulcrum guide serving as a fulcrum for traversing a yarn, and a traverse device for traversing the yarn to the left and right before winding the yarn.
A contact pressure roller for applying a predetermined surface pressure by contacting the wound yarn; two spindles for alternately winding the traversed and fed yarn; and the two spindles When switching from a turret member that rotates them alternately to a winding position and a standby position and a yarn from a wound package tightened to one spindle to an empty bobbin tightened to another spindle. Then, the yarn is removed from the traverse device on the upstream side with respect to the running direction of the yarn with the empty bobbin interposed therebetween, and an upper yarn pulling guide that moves toward the yarn gripping portion on the empty bobbin, and the yarn is also emptied on the downstream side. What is claimed is: 1. A yarn winding device comprising: a lower yarn pulling guide that moves toward a yarn gripping portion on a bobbin; and a yarn winding restriction guide that regulates a yarn path of a yarn from the lower yarn pulling guide to a winding package. , Change the thread In the process of moving the winding package from the winding position to the standby position, the rotation of the turret member is stopped before the yarn comes into contact with the empty bobbin, and then the lower yarn pulling guide and the yarn path regulating guide Is configured to be movable between the empty bobbin and the wound package, and the upper yarn guide and the lower yarn guide are synchronized, and the yarn on the empty bobbin can be moved without stopping the yarn being traversed. The yarn gripper is configured to operate so as to be substantially parallel to the yarn gripper so as to be substantially parallel to the yarn gripper, and at least one of the upper yarn puller guide, the lower yarn puller guide, and the turret member is operated during yarn pulling. A winding device for a synthetic fiber, wherein the yarn is switched by winding the yarn around an empty bobbin. 5. The thread guide according to claim 4, wherein the upper thread guide is provided so as to cross the thread path immediately before switching and not to cross the thread path immediately after switching, as viewed from the spindle axis direction. Synthetic fiber winding device. 6. An upper thread pulling guide and a lower thread pulling guide are both fixed to one connecting member, and the connecting member is inclined in both the longitudinal direction of the spindle axis and the direction perpendicular to the spindle axis. 6. The synthetic fiber winding device according to claim 5, further comprising a mechanism for moving the synthetic fiber.