JPH02265864A - Winding method for thread - Google Patents

Abstract

PURPOSE:To prevent a twill drop generated at the time of restarting in case of ending by setting ratio of a speed of a friction drum to a speed of a traverse cam smaller at the time of restarting from the time of thread ending than that at the normal time. CONSTITUTION:At the time of restarting a traverser device from the time of ending, ratio of a speed of a friction drum 4 in a rewinder device to a speed of a traverse cam 10 is set smaller than at the normal time. Thus in case of rising at the time of restarting after ending, the traverse cam 10 is placed in a condition that it operates prior to the friction drum 4, increasing a twill angle larger at the time of restarting than a twill angle at the time of end breakage, and a staying time in the end part of a winding package 1 is shortened, advancing returning a yarn guide 9. Also a yarn 2 is early returned in a manner wherein it is drawn by an early turn of the yarn guide 9, as a result the yarn is not wound to the end part of the package 1, eliminating any twill drop.

Description

[Detailed description of the invention]

r Industrial Application Field 1 The present invention relates to a method for winding yarn into a package using a traverse device.

[Prior art I] In a conventional yarn winding device, as shown in Fig. 4,
When winding the yarn 2 around all the winding packages 1, the yarn 2 is traversed by the traverse guide device 3, and the yarn 2 is evenly or in any shape on the rotating winding package 1 in pressure contact with the friction drum 4. Perform winding. In this case, a two-motor drive device that independently rotates the friction drum and drives the traverse guide Ili& may be used. That is, the friction drum 4 is moved by the motor 5 to the pulley 6. A traverse cam 10 that is driven via a belt 7 and a pulley 8 and guides a yarn guide 9 of a traverse guide device M3 is driven by a motor 11.
pulley 12. Belt 13. They are each driven via pulleys 14. The yarn guide 9 performs traversing while being guided by a rod 17 by a guide roller 16 that is guided within a cam groove 15 by rotation of the traverse cam by 1 degree. In such a device, when winding is performed at a constant winding angle, the rotation of the friction drum and the rotation of the traverse cam are synchronized. Therefore, when restarting after yarn breakage occurs and yarn splicing is performed, the motor 5 for driving the friction drum 4 and the traverse cam 1
The o drive motor 11 was started at the same time. Therefore, as shown in the graph of FIG. 5, a yarn winding method was adopted in which the rotations of the friction drum and the traverse cam started at the same time and reached a steady rotation speed almost simultaneously at time T. Problems to be Solved by the Invention In the conventional winding method as described above, when the yarn is restarted after yarn breakage, the rotation of the friction drum and traverse cam synchronize and increase at a constant rate, so the ridge angle also increases during normal operation. It is wound up at a constant angle similar to time. Therefore, in a state where the winding tension tends to be low and the winding state is not stable, such as when restarting, there is a drawback that the twill falls off at the end face of the package.

[How to solve the problemFjJ In a method for winding yarn on a traverse device driven by a motor and a winding device driven by a motor separate from the motor, the rotation of the friction drum relative to the rotation speed of the traverse cam is The ratio is set so that it is smaller than normal when restarting from yarn splicing, thereby preventing twill drop that occurs when restarting yarn splicing. [Function] When restarting after yarn splicing, the traverse cam operates in advance of the friction drum, and the ridge angle at the time of restart is larger than the ridge angle at the time of yarn breakage. Uradome time is short and the yarn guide returns quickly. The yarn also returns quickly as it is dragged along by the rapid turns of the yarn guide, and as a result, it does not wind up all the way to the edge of the package, eliminating twill-fall.

[Embodiment 1] A first embodiment of the present invention will be described based on FIGS. 1 and 2. The method of the present invention can be carried out using the conventional two-motor drive type doubling machine shown in FIG. When winding the yarn 2 onto the winding package 1, the winding package 1 rotates by pressing against the fliximin tram 4 while performing traversing with the traverse guide @[if3. Let's do it. The friction drum 4 is connected to a pulley 6 by a motor 5. It is driven via a belt 7 and a pulley 8. On the other hand, traverse guide 8M3
A traverse cam 10 that guides a yarn guide 9 is moved by a motor 11 to a pulley 12 . Belt 13. It is driven via a pulley 14. In this device, when a thread breakage occurs, each motor 5, 11 is stopped, and after the thread is spliced, each motor is restarted. Initially, at time T1, the motor 11 is driven and only the traverse cam 10 is rotated. Next, at time T2, the motor 5 is driven to rotate the friction drum 4, but between T1 and T2, only the traverse cam takes the lead and winding is not performed. ■After point 2, winding is performed, but the rotational speed ratio of the friction drum and traverse cam changes from graph b' of the conventional friction drum when the friction drum is operated at the same time as the traverse cam to graph b. Because of this, the rotation of the friction drum is relatively slow. Therefore, the traverse cam reaches a steady rotation speed at time T3, and this tendency continues until the friction drum reaches a steady rotation speed at time T4. When the traverse guide enters the leading state in this way, the thread 2 to be wound onto the winding package changes from the normal winding state of C to the edge angle of d, as shown in FIG. 2 as a developed view of the package surface. Although it is a large winding, at the traverse end, the yarn is pulled by the quick return of the yarn guide, causing the yarn to turn inward from the panguji end, and return quickly before reaching the package end. As a result, twill drop can be prevented. A second embodiment of the present invention is shown in the graph of FIG. In this embodiment, at time T5, the motor 5 and the motor 11 are driven simultaneously, so that the friction drum 4 and the traverse cam 10 are operated simultaneously. However, the rotation speed of the motor 5 starts up later than the rotation speed of the motor at normal restart, and the Flixmintrum 4
transitions from the conventional graph b' to the graph b of this embodiment. As a result, the traverse cam reaches a steady rotation speed at T6, while the friction drum
The rotational speed of the motor 5 is controlled so that it reaches steady rotation at point 7. As a result, the traverse cam 10 precedes the rotation of the normal friction drum 4, and the first
It has the same effect as the embodiment. Effects of the Invention The present invention provides a yarn winding method and a traverse device in which a yarn winding device and a traverse device that traverses the yarn wound by the winding device are driven by separate drive sources. The ratio of the rotation speed of the friction drum of the take-up device to the rotation speed of the traverse cam was set to be smaller than normal when the traverse cam was restarted after the yarn splicing. Since it operates in advance, the edge angle of the thread to be wound will be larger at the time of restart than at the time of thread breakage, and the return of the thread at the traverse end will be a little faster, allowing the system to wind up to the end of the package. This prevents twill from falling off.

[Brief explanation of drawings]

FIG. 1 is a graph showing the operation of the first embodiment of the present invention;
The figure is a developed view of the surface of a package wound by the method of the present invention, and FIG. 3 is a graph showing the operation of the second embodiment of the present invention.
A fourth perspective view of a conventional winding device, and FIG. 5 is a graph showing the operation of the conventional device. 1... Winding package, 2... Thread. 3...Traverse guide. 4...Friction drum, 5.11...Motor. 9... Yarn guide, 10... Traverse cam patent applicant Murata Kousai Co., Ltd. Agent Patent attorney Katsu Ohno Agent Patent attorney Reiko Ohno Figure 1 Figure 4 Figure 2 Figure 3

Claims (1)

[Claims] 1. In a yarn winding method in which a yarn winding device and a traverse device that traverses the yarn wound by the winding device are driven by separate drive sources, restarting the traverse device from the time of yarn splicing. A yarn winding method characterized in that the ratio of the rotation speed of a friction drum of a winding device to the rotation speed of a traverse cam is set to be smaller than normal.