JPS6038304B2 - Thread path difference absorption device in a thread winding mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a thread winding mechanism for forming cheese by winding continuously fed thread around the outer periphery of a bobbin while traversing it in an open-end paper machine. The present invention relates to a path difference absorbing device for absorbing a yarn path difference that occurs due to traverse during winding operation of a mechanism.

Conventionally, in a bobbin winding mechanism installed in an open-end fine loom, as shown in FIG. is traversed in the left-right direction by the traverse guide 6 via the winding drum 7.
The cheese 9 was wound around the outer periphery of the bobbin 8 which was being rotated in contact with the cheese 9.

However, in the conventional thread winding mechanism configured as described above, when the thread 4 is wound around the outer circumference of the bobbin 8 while being traversed by the traverse guide 6, the thread 41 has a path difference due to this traverse. This caused the tension of the thread to fluctuate significantly, posing a major hindrance to the formation of cheese 9.

In other words, ``As is clear from Figures 1 and 2, the thread 4
is traversed left and right with a traverse width T based on the nib point A between the delivery roller 2 and the top roller 3, and the winding position B of the yarn 4 at the contact area between the winding drum 7 and the cheese 9 is reciprocated left and right. When the thread is moved, "the path lo of the thread turtle from the nip point A to the winding position B at the center of the traverse,"
The path changes from the nip point A to the winding position B at both ends of the traverse as shown in path 1, and as the yarn 4 moves toward path 1 at both ends of the traverse with path lo at the center of the traverse as a reference, the path difference increases. It got bigger. Therefore, in the secondary thread winding mechanism, due to the thread path difference caused by the above-mentioned traverse, the thread tension fluctuates significantly during the winding operation, which has an adverse effect on the winding shape of the cheese 9, especially on both end faces. In addition to the shape being distorted, the hardness of the cheese 9 was not uniform in the axial direction, making it difficult to unwind the thread from the cheese 9 in the subsequent process, resulting in frequent thread breakage. .

In order to eliminate such defects, as shown in FIG. 3, a fixed path difference absorbing guide 10 is provided at the yarn passing position between the delivery roller 2 and the winding drum 7, and a guide 10 is provided at the front edge of the guide 10. A thread winding mechanism has also been proposed in the past that is configured to absorb the path difference of the thread 4 caused by traverse by guiding the thread 4 via the formed substantially arc-shaped cam surface 10a. However, in the secondary thread winding mechanism equipped with this path difference absorbing guide 10, when the thread 4 is traversed and wound onto the bobbin 8 as shown by solid lines in FIGS. 4a and 4b, the path difference absorbing guide 10 cam surface 1
Due to the contact resistance between 0a and the thread 4, the thread 4 on the cam surface 10a
Even though the cam surface 10a of the path difference absorbing guide 10 was formed according to the path difference of the yarn 4 during traverse, the path difference of the yarn could not be reliably absorbed.

Furthermore, when the thread 4 is traversed toward the right as shown in FIG. 4a, and when it is traversed toward the left as shown in FIG. 4b, the thread on the cam surface 10a is 4 is in the opposite direction, so even though the winding position of the yarn 4 at the contact point between the winding drum 7 and the cheese 9 is at the same point), the amount of path difference absorption depends on the direction of traverse. As a result, it was not possible to uniformly absorb the difference in the thread path in the reciprocating stroke of the traverse.
Further, at the turning points of the yarn at both ends of the traverse, for example, when the yarn 4 is traversed to the left and the winding position reaches the left end BI point, as shown in FIG. The contact position of the thread 4 on the top is at a position delayed from point C, and while the thread 4 is turned back and traversed to the right and the winding position is transferred from point B to point B2, the contact position on the cam surface IQa is The contact position of the thread 4 was not moved from point C due to the above-mentioned contact resistance, and the path difference of the thread 4 could not be absorbed at all between the folded portions BI-B2 at both ends of the traverse.

This invention was made in order to eliminate the defects in the conventional thread winding mechanism as described above, and its purpose is to:
A new thread winding mechanism that can reliably absorb thread path differences caused by traversing during winding operation, reduce fluctuations in thread tension, and form cheese with a uniform winding shape and hardness. An object of the present invention is to provide a yarn path difference absorbing device.

Therefore, the basic structure of the present invention will be explained with reference to FIGS. 6a and 6b. Yarn contact cam surfaces 20a and 20b have different shapes when traversing to the left.
It is designed to present. That is, when the thread 14 is traversed toward the right as shown in FIG. The cam surface 2 has a shape that is biased to the left due to the amount of path difference absorption due to the delay.
0a, the path difference of the yarn 14 caused by the traverse is absorbed, and the yarn 14 is traversed leftward as shown in FIG. If you tend to lag to the right,
The path difference of the thread 14 is absorbed by the cam surface 20b, which has a shape in which the amount of path difference absorption is biased to the right by the delay of the thread. Furthermore, the thread 1 at both ends of the traverse
At the turning point 4, for example, as shown in FIG. 6a, the thread 14 is moved to the right along the cam surface 20a, and after the thread winding position reaches the BI point at the right end, it is turned back to the left. When the guide 20 is moved, the cam surface of the path difference absorbing guide 20 is switched from the shape 20a to the shape 20b, and the thread 14 that was in contact with the right end point C of the cam surface 20a changes to the cam surface as shown in FIG. 6b. 20b contacts point C at the right end, and even if the contact position of the thread 14 is not moved to the left along the cam surface, as the winding position of the thread 14 is turned back and shifted to the left, the contact The amount of path difference absorption at point C is increased.

Next, the configuration of the bobbin winding mechanism in an open-end spinning machine embodying the present invention will be explained with reference to FIGS. The yarn 14 that is continuously sent out by the top roller 12 and the top roller 13 is traversed in the left and right direction by the traverse guide 16, wound around the outer periphery of the bobbin 18 which is being rotated in contact with the winding drum 17, and is wound into the cheese 19. is starting to form.

A drum-shaped path difference absorbing guide 20 is provided at the yarn path position between the pre-consignment delivery roller 12 and the winding drum 17.
is rotatably supported.

A gear coupling mechanism 23 is provided between the rotating shaft 21 of the path difference absorbing guide 20 and a traverse cam 22 for reciprocating the traverse guide 16, and absorbs path differences in synchronization with the reciprocating movement of the traverse guide 16. The guide 20 is now rotated. This synchronous operation is performed by the traverse guide 16 for one rotation of the path difference absorbing guide 20.
may be configured to reciprocate any number of times from 1 to n (an integer), but in this embodiment, the traverse guide 16 is configured to reciprocate 31 times for one rotation of the path difference absorbing guide 20. has been done. Said path difference absorption guide 2
6a so that the path difference absorbing characteristic as shown in FIG.
, b, a pair of cam surfaces 20a, 20b are continuously formed in an oblique shape.

That is, in this embodiment, the traverse guide 1
Since the path difference absorbing guide 20 rotates once for each reciprocation of the thread 14, the thread 14 is transferred from the left end to the right end by the traverse guide 16, as is clear from FIGS. 8 and 9. While the path difference absorbing guide 20 rotates half a turn, one cam surface 20a tilted to the left appears at the thread contact position C on its outer circumferential surface, and while the thread 14 is being transferred from the right end to the left end. Then, the path difference absorbing guide 20 further rotates by half a turn, and the other cam surface 20b deflected to the right side appears at the thread contact position C on the outer circumferential surface. Therefore, in the thread winding mechanism of this embodiment, during the winding operation, the path difference absorbing guide 2
0 is rotated once, the thread 14 is traversed toward the right, and the contact position C of the thread 14 against the path difference absorbing guide 20' is delayed to the left due to contact resistance, as shown in FIG. As shown by the solid line, a cam surface 20a appears in which the path difference absorption amount is biased to the left by the delay of the yarn, and the path difference of the yarn 14 caused by the traverse is absorbed.
Further, when the thread 14 is traversed toward the left and the contact position of the thread 14 against the path difference absorbing guide 201 is delayed to the right, as shown by the broken line in FIG.
A cam surface 20b having a shape in which the amount of path difference absorption is biased to the right by the delay of the yarn appears, and the path difference of the yarn 14 is absorbed.

Further, in the folded portions at both ends of the traverse, the contact position of the thread 14 with the outer peripheral surface of the path difference absorbing guide 20 is not moved in the left-right direction, but the thread 14 stopped at the same layer is cam surface 20
The terminal ends of the cam surfaces 20b and 20b come into continuous contact with the starting ends of the other cam surfaces 20b and 20a, and as the thread 14 is turned back and transferred from both ends of the traverse, the difference in the thread path is continuously absorbed. Ru.

Therefore, even if the yarn 14 is delayed on the path difference absorbing guide 20 or stopped at the folded portions at both ends of the traverse, the difference in the path of the yarn 14 caused by the traverse can be avoided during the reciprocating stroke of the traverse. The cheese 19 is absorbed accurately and uniformly through the winding operation, reducing fluctuations in thread tension during the winding operation, and forming cheese 19 with a uniform winding shape and hardness. In addition, in the above embodiment, the path difference absorbing guide 20
When the path difference absorbing guide 16 is configured to reciprocate several times for one rotation of When configured in this way, the path difference absorbing guide 20 is rotated by a predetermined angle each time the traverse guide 16 makes one reciprocation, and the approximate difference in the length of the thread 14 is absorbed by the pair of cam surfaces 20a and 20b. become.

Next, another embodiment of the present invention shown in FIG. 10 will be described. In this embodiment, a plate-shaped path difference absorbing guide 20 having a substantially arc-shaped cam surface on the front edge is supported by a support shaft 24. When the cam surface 20a is rotatably arranged and rotated to one position as shown by the solid line in FIG. 10, a cam surface 20a whose path difference absorption amount is biased to the left appears, and as shown by the chain line in FIG. As shown, when the cam surface 20b is rotated to the other position, a cam surface 20b whose path difference absorption amount is biased toward the right side appears. The path difference absorbing guide 20 is operated by a pair of switching cams 25 mounted on the rotating shaft 21 to move the traverse guide 16 between the two positions every one reciprocation in synchronization with the reciprocating movement of the traverse guide amount 6. The kirifusuma is rotated once every year. Therefore, in this embodiment as well, the path difference of the yarn 14 caused by the traverse is corrected and uniform throughout the reciprocating stroke of the traverse by both cam surfaces 20a and 20b of the path difference absorbing guide 20, as in the previous embodiment. It is absorbed like that.

As described in detail above, the present invention operates a path difference absorbing guide for absorbing the yarn path difference caused by traverse in synchronization with the reciprocating motion of the traverse guide, and By configuring the structure so that two types of cam surfaces appear at the yarn contact position on the path difference absorption guide during the stroke, the amount of path difference absorption is biased to the opposite side by the amount of yarn delay due to contact resistance. Accurately and uniformly absorbs the yarn path difference that occurs due to traversing during handling,
This has the excellent effect of reducing fluctuations in thread tension and forming cheese with uniform winding shape and hardness. Note that this invention is not limited to the configuration of the above-described embodiments, and the configuration of each part can be arbitrarily changed without departing from the spirit of the invention.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal side view showing a thread winding mechanism of a conventional open-end spinning frame that is not equipped with a path difference absorption device; FIG. 2 is an explanatory diagram for explaining the thread path difference in the thread winding mechanism of FIG. 1; FIG. 3 is a perspective view of a main part of a thread winding mechanism equipped with a conventional path difference absorbing device, FIGS. FIG. 5 is an explanatory diagram for explaining the absorption state of the path difference between the threads at both ends of the traverse in the thread winding mechanism shown in FIG.
6a and 6b are explanatory diagrams explaining the basic structure and operation of the path difference absorbing device of the present invention, FIG. 7 is a perspective view of essential parts of a thread winding mechanism showing an embodiment of the present invention, and FIG. 8 and the ninth
The figure is an explanatory diagram for explaining the shape of the approximate longitudinal difference absorption guide shown in FIG. 7, and FIG. 10 is a perspective view of the main part of a thread winding mechanism showing another embodiment of the present invention. Thread...14, Traverse guide...16, Bobbin...
...18, Cheese...19, Path difference absorption guide
...20, cam surface ...20a, 20b. Figure 1 Figure 2 Figure 3 Figure 4 (a) Figure 4 and others Figure 5 Figure 6 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10

Claims (1)

[Scope of Claims] 1. In a thread winding mechanism that winds continuously fed thread around the outer periphery of a bobbin while traversing it using a traverse guide to form a cheese, the thread path leading to the winding position on the outer periphery of the bobbin has a A path difference absorbing guide is provided to absorb the yarn path difference caused by traversing, and this path difference absorbing guide is operated in synchronization with the reciprocating movement of the traverse guide, so that the reciprocating stroke of the yarn due to traverse is ,
A thread winding mechanism characterized in that two types of cam surfaces are formed at the thread contact position on the thread difference absorbing guide so that the amount of absorption of the thread difference is biased to the opposite side by the delay of the thread due to the contact resistance. Thread path difference absorption device. 2. A drum-shaped path difference absorbing guide is rotatably arranged so as to be rotated in synchronization with the reciprocating motion of the traverse guide, and two types of cam surfaces are successively formed on the outer peripheral surface of the guide. A thread path difference absorbing device in a thread winding mechanism according to claim 1. 3. A plate-shaped path difference absorbing guide is operable to be switched between two positions in synchronization with the reciprocating movement of the traverse guide, and in the two switched positions, a path difference absorbing guide is provided with a A thread path differential suction device in a thread winding mechanism according to claim 1, characterized in that it is configured so that two types of cam surfaces are exposed.