JPH08245080A - Filament switching method for turret type winder and winding package - Google Patents

Abstract

PURPOSE: To dissolve the possibility of wound yarn passing a yarn grip groove again and secure sufficiently long tail yarn length by forming a bar winding layer and a tail winding layer between the bobbin yarn grip groove and a bobbin winding layer. CONSTITUTION: A first yarn guide 5 moves laterally to enter a traverse area, catches filament Y fed from a shogging fulcrum guide 15 to remove it from a traverse guide 13, and stops in front of the extension line S of a yarn grip groove 3. A second yarn guide 6 advances while catching the filament Y and moves from the extension line S of the yarn grip groove 3 over to the bobbin end face side. At this time, the filament Y is caught in the yarn grip groove 3 and wound onto an empty bobbin 1 and at the same time separated from a full-wound bobbin 1. The filament Y forms a bar winding part in an area on the inner side of the yarn grip groove. When the first yarn guide 5 is returned into the original position, the filament Y is caught by a traverse guide 13a and then wound into a winding area at the center of the bobbin to form a bobbin winding layer 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a yarn switching method in a turret type winding machine and a yarn winding package formed by the yarn switching method.

[0002]

2. Description of the Related Art In general, a bobbin package having a bobbin wound with a synthetic fiber yarn is formed as shown in FIG. That is, a bobbin layer 2 is formed in the central region of the bobbin 1,
A thread gripping groove 3 for locking the winding start thread end and a bar winding portion 4 are formed at the end of the bobbin. The rod winding portion 4 is provided as a means for stopping the yarn so that the yarn end does not come loose from the bobbin 1, and is formed by winding the yarn in multiple places.

The user of the above-mentioned wound package uses the tail yarn Yt at the bobbin end of one of the wound packages and the tail yarn on the surface side of the yarn layer of the other wound package when continuously using a plurality of wound packages. I am trying to continue. In order to take out the tail yarn Yt at the end of the bobbin in splicing such a yarn, it is necessary to shift the rod winding portion 4 toward the end face of the bobbin and remove it.

In the conventional bobbin package, in order to facilitate the work of removing the bar winding portion 4 as described above, the bar winding portion 4 is provided outside the bobbin from the thread gripping groove 3 as shown in FIG.
Further, since the rod winding portion 4 is formed on the bobbin end portion on the outer side of the yarn gripping groove 3 in this manner, the conventional yarn switching method of the turret type winding machine has been carried out as shown in FIG. That is, as shown in FIG. 4, the bobbin 1 at the upper winding position is
When is fully wound, the turret board 10 rotates, the full bobbin 1 moves to the lower standby position, and the empty bobbin 1 at the lower standby position switches to the upper winding position. Next, the first yarn guide 5 for pulling up the yarn above the winding position moves laterally, catches the middle of the yarn Y traveling from the upper swing fulcrum (not shown) to the full bobbin 1, and ends the empty bobbin 1 end. It moves to a position slightly beyond the extension line S of the yarn gripping groove 3 of the portion.

Next, the yarn Y running between the first yarn guide 5 and the full bobbin 1 is hooked by the second yarn guide 6 below the winding position to move laterally, and the yarn Y is emptied. Since the yarn Y passes over the yarn gripping groove 3 while sliding upward, when the yarn Y is caught on the yarn gripping groove 3 (at an angle θ with respect to the extension line S), the yarn Y is caught in the yarn gripping groove 3. Is wound around the empty bobbin 1 and is simultaneously separated from the full bobbin 1. The yarn Y wound up on the empty bobbin 1 is wound by the yarn tension from the first yarn guide 5 so as to be orthogonal to the bobbin axis, and thus forms the bar winding portion 4 in the outer region of the yarn gripping groove 3.

However, according to the above-mentioned yarn switching method, when the first yarn guide 5 returns to the initial position and the yarn Y moves to the regular winding region (traverse region) in the central region of the bobbin 1, Since the line Y has to cross the yarn gripping groove 3 again, it is temporarily caught in the yarn gripping groove 3 and stays there. Therefore, as shown in FIG. 5, the yarn is spirally wound at a small angle θ ₁ with respect to the bobbin circumferential direction from the bar winding portion 4 to the yarn gripping groove 3, but is wound from the yarn gripping groove 3 at the center. When moving to the region, the yarn is temporarily retained in the yarn gripping groove 3, and thus moves to the central winding region while being wound by a spiral having an angle θ ₂ larger than the angle θ ₁ . Therefore, the length that can be used as the tail yarn Yt becomes short.

As described above, it is necessary to secure the minimum length of the tail thread Yt in order to connect a plurality of thread winding packages. However, in the conventional thread winding package, the tail thread length is set to the above reason. It was unstable and sometimes it was not possible to obtain the required tail thread length. Further, as described above, in the conventional thread switching method, the first thread end is the thread gripping groove 3
When it is caught by the thread winding thread 4 and when the tail winding is performed toward the thread winding layer 2 after forming the rod winding portion 4, the thread passes through the thread gripping groove 3 again, so that the yarn is bitten into the thread gripping groove 3 twice. Therefore, when attempting to automatically mechanically remove the bar-wound portion 4,
There is a problem that the removal cannot be performed smoothly, and the removal work becomes very complicated.

[0008]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned conventional problems, to secure a sufficient tail yarn length, and to facilitate the automatic winding work of the winding portion. It is an object of the present invention to provide a yarn switching method for a turret type winding machine that enables the formation of such a wound package and the wound package.

[0009]

In the yarn switching method according to the present invention for achieving the above object, when the bobbin at the winding position reaches a full winding in the turret type winding machine, the full bobbin is moved to the standby position. The empty bobbin waiting at the standby position is changed to the winding position, and the intermediate portion of the yarn traveling from the swing fulcrum to the full-winding bobbin is moved in the axial direction of the bobbin in the upstream side of the winding position. By the yarn pulling operation of the first yarn guide movable in parallel and the second yarn guide movable in parallel to the bobbin axial direction between the winding position and the standby position, the yarn holding groove at the end of the empty bobbin is formed. In the method of engaging and engaging and separating the full bobbin to switch the yarn, the first yarn guide corresponds to the yarn gripping groove while hooking the traveling yarn to the end side of the empty bobbin at the winding position. Slightly to the center of the bobbin Moved on standby, then the second
The yarn guide is engaged with the yarn gripping groove by moving the yarn guide to the end side of the empty bobbin slightly from the position corresponding to the yarn gripping groove to the bobbin end face side while hooking the traveling yarn. By winding the empty bobbin around the empty bobbin and further winding it while being guided by the first thread guide, a bar winding portion is formed closer to the center of the bobbin than the thread gripping groove.

Further, the bobbin package according to the present invention has the bobbin layer in the central region of the bobbin, and the rod winding part and the tail winding part are formed between the bobbin layer and the thread gripping groove provided at the end of the bobbin. It is characterized by. Thus, in the present invention,
Since the rod winding portion is formed together with the tail winding between the thread winding groove and the thread winding layer, when the winding moves from the rod winding portion to the regular winding area while the tail winding is performed, the yarn re-enters the thread holding groove. Never pass. That is, since the yarn is not caught twice in the yarn gripping groove, the work of automatically removing the winding portion is facilitated. Further, since the formation of the tail winding is not temporarily held in the yarn gripping groove and hindered, the tail length is not shortened and the tail length can be guaranteed to be a constant length.

[0011]

EXAMPLES The present invention will be described below with reference to the examples shown in the drawings. 1 and 2 are schematic views illustrating a yarn switching method of a turret type winder according to the present invention. In FIGS. 1 and 2, a pair of spindles 12 and 12 is attached to a turret board 10 supported by a rotary shaft 11, and bobbins 1 and 1 are attached to the spindles 12 and 12, respectively. The upper side of the pair of spindles 12, 12 is in the winding position, and the lower side is in the standby position.

A traverse device 13 is provided above the winding position on the upper side, and a swinging fulcrum guide 15 serving as a supply point of the yarn Y is provided above the traverse device 13. The yarn Y supplied from the swing fulcrum guide 15 is the traverse guide 13
The bobbin 1 at the winding position is wound up as a bobbin layer 2 while being reciprocally traversed left and right by a.

When the bobbin 1 at the winding position is fully wound, as shown in FIG.
By rotating the turret board 10 by 180 ° as shown in (A), the full bobbin 1 moves to the standby position on the lower side as shown in FIG. 2 (B), and the empty bobbin 1 waiting on the lower side. Moves to the upper winding position. When the position of the bobbin is exchanged in this manner, the yarn Y that is being wound on the lower fully-wound bobbin 1 is regulated by the yarn guide regulation guide 14 while contacting the surface of the upper empty bobbin 1 in the middle thereof. To form a yarn path leading to the full bobbin 1.

When the state of FIG. 2B is reached as described above,
The first yarn guide 5 waiting on the outside of the traverse area by the traverse guide 13a above the winding position moves laterally as shown in FIG. 1 to enter the traverse area, and the yarn supplied from the swing fulcrum guide 15 The thread Y is hooked to be removed from the traverse guide 13a, further advanced to the vicinity of the end of the empty bobbin, and stopped slightly before the extension line S of the thread grip groove 3. At this time, the yarn path of the yarn Y is bent by the first yarn guide 5 into a V shape as shown by the solid line, and is regulated by the yarn guide 15 on the lower yarn guide regulating guide 14 to be full. It is adapted to be wound up on the winding bobbin 1.

Next, the second yarn guide 6 provided in the vicinity of the yarn path regulation guide 14 starts lateral movement as shown in FIG.
The yarn Y running between the first yarn guide 5 and the yarn guide 15 is hooked and advanced, and the yarn Y moves to a position slightly beyond the extension line S of the yarn gripping groove 3 to the bobbin end face side. Thus, when the second yarn guide 6 crosses the extension line S and the yarn path of the yarn Y crosses over the yarn holding groove 3 of the empty bobbin 1 as shown by the broken line (with respect to the extension line S of the yarn holding groove 3). (When the angle becomes θ), the yarn Y is caught by the yarn gripping groove 3 and is wound up on the empty bobbin 1 and simultaneously separated from the full bobbin 1.

The yarn Y being wound up on the empty bobbin 1.
Is regulated by the first yarn guide 5, so that the bar winding portion 4 is formed in the region inside the yarn gripping groove 3 by the yarn tension as shown in FIG. Next, when the first yarn guide 5 returns to the original position outside the traverse area (the right end in FIG. 1), the yarn Y is caught by the traverse guide 13a in the middle, and thereafter, the yarn Y is traversed by the traverse guide 13a and is moved to the center of the bobbin. The yarn winding layer 2 is formed by winding in the winding area. Then, when it is fully wound, a wound package as shown in FIG. 3 is formed.

As described above, according to the yarn switching method of the present invention, the rod winding portion 4 and the tail winding portion have the thread gripping groove 3 and the thread winding layer 2.
And the tail yarn Yt is spirally wound from the rod winding portion 4 to the regular winding region (traverse region), the yarn does not pass through the yarn gripping groove 3 again. Therefore, unlike the conventional thread switching method, the tail thread Yt is temporarily held in the thread gripping groove, so that the tail thread Yt is wound at a large spiral angle, and the tail winding length is not shortened. . Further, since the yarn is not caught twice in the yarn gripping groove 3, it is possible to facilitate the work for automatically removing the bar winding portion from the yarn winding package.

[0018]

As described above, the thread switching method in the turret type winder according to the present invention and the thread winding package obtained from the thread switching method include a thread winding groove on a bobbin and a thread winding layer. Since it is formed between them, the wound-up yarn does not pass through the yarn gripping groove again when transitioning to form a regular wound layer while tail winding from the rod winding portion. Therefore, when the tail is wound after forming the rod winding portion, the tail winding length is not shortened by temporarily holding the yarn in the yarn gripping groove, and it is possible to secure a sufficiently long tail yarn length. it can. Further, since the yarn is not caught twice in the yarn holding groove, it is possible to facilitate the automatic removal of the bar winding portion.

[Brief description of drawings]

FIG. 1 is a schematic view illustrating a yarn switching method of a turret type winder according to the present invention.

FIG. 2A is a front view showing a state when the bobbin is fully wound in the yarn switching method of the turret type winding machine according to the present invention, and FIG.
It is a front view when rotating.

FIG. 3 is a front view showing a wound package according to the present invention.

FIG. 4 is a schematic view illustrating a yarn switching method of a conventional turret type winding machine.

FIG. 5 is a front view showing a conventional wound package.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 bobbin 2 thread winding layer 3 thread gripping groove 4 bar winding portion 5 first thread guide 6 second thread guide 10 turret board 12 spindle 14 thread path regulation guide 15 thread guide Y thread Yt tail thread

Claims (3)

[Claims] 1. When a bobbin at a winding position reaches a full winding in a turret type winding machine, the full bobbin is replaced with a standby position, and an empty bobbin waiting at the standby position is replaced with a winding position. Then, the intermediate portion of the yarn running from the swing fulcrum to the full-winding bobbin is provided with a first yarn guide capable of moving in parallel to the bobbin axial direction on the upstream side of the winding position, the winding position, and the standby position. In the method of engaging the yarn holding groove at the end of the empty bobbin by the yarn pulling operation with the second yarn guide that can move in parallel to the bobbin axis direction, and switching the yarn by disconnecting from the full bobbin at the same time. While moving the first yarn guide toward the end of the empty bobbin at the winding position while hooking the traveling yarn, the first yarn guide is moved to a position slightly closer to the center of the bobbin than the position corresponding to the yarn gripping groove, and then the second yarn guide is held. Guide the end of the empty bobbin By moving the running yarn to the side slightly toward the bobbin end face side from the position corresponding to the yarn gripping groove while hooking the running yarn to the side, the running yarn is engaged with the yarn gripping groove and wound around the empty bobbin, Furthermore, the yarn switching method of the turret type winder, wherein a bar winding portion is formed closer to the center of the bobbin than the yarn gripping groove by winding up while being guided by the first yarn guide. 2. A bobbin package having a bobbin layer in the central region of a bobbin, wherein a bar winding portion and a tail winding portion are formed between the bobbin winding layer and a thread gripping groove provided at an end of the bobbin. 3. The thread winding package according to claim 2, wherein the bar winding portion and the tail winding portion are arranged in this order from the thread gripping groove to the thread winding layer side.