JPH0233070A - Treatment of double yarn on package side - Google Patents

Abstract

PURPOSE:To perfectly remove a yarn wound on the outer periphery of the core tube, etc. of a package by allowing a slab catcher to detect the sucked yarn sucked into a suction mouth and setting the reversal time of the package longer than a prescribed time for the preceding processes, in the next yarn relaying. CONSTITUTION:When double yarn is sucked into a suction mouth 7 during the yarn relaying operation, a slab catcher 4 detects said suction, and in the next yarn relaying operation, the yarn wound onto the outer periphery of a core tube, etc. of a package 6 can be surely removed by setting the reversal time of the package 6 longer than a prescribed time for the preceding processes.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a method for processing yarn during a yarn splicing operation in an automatic winder, etc. The yarn from the spinning bobbin is wound onto a package rotated by a drive drum driven by a motor via a slab catcher that is equipped with abnormal yarn detection and yarn cutting functions. During this winding, if the slab catcher detects an abnormal system, it cuts the abnormal yarn, and after cutting, brings the package side suction mouth close to the outer periphery of the package, and while the package is reversed for a predetermined period of time by the drive drum, the yarn end on the package side is suctioned with a suction mouth on the package side, and the yarn end is guided to the splicing device. [Problems to be solved and attempted by the invention] However, the yarn end of the package after abnormal yarn cutting is not necessarily aligned with the outer peripheral surface of the package. Depending on the traverse position at the time of cutting, the end of the thread may fall off the package.
If the thread is wrapped around the package's core tube, etc., the thread suctioned by the suction mouth becomes a double system, with the end of the thread wrapped around the outer circumference of the package's core tube, etc. The suction mouse sucks up the thread.

If you suction the 2ffi thread with the suction mouth,
The slab catcher detects this, cuts the double yarn, and performs the yarn splicing operation again, but the yarn ends may remain wrapped around the outer periphery of the core tube of the cage. In this case, if the slab catcher detects an abnormal system7 and the yarn splicing operation is repeated several times, the yarn may not be able to be spliced normally due to the yarn wrapped around the outer periphery of the core tube of the package. or stop.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and provides a method for processing double yarn on the package side, which can completely remove the yarn wrapped around the outer periphery of the package.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides an I! A The package is rotated by a moving drive drum to wind the yarn from the spinning bobbin, and abnormalities in the yarn during winding are detected by a slab catcher and cut. When the side yarn end is suctioned by the suction mouth and the suctioned yarn end is guided to the yarn splicing device for splicing, when the double yarn is suctioned by the suction mouth, the slab catcher detects this and 1 , the reversal time of the package is set longer than the predetermined time during the next yarn splicing operation.

[Function] With the above configuration, when double yarn is sucked into the suction mouth during a yarn splicing operation, the slab catcher detects this, and during the next yarn splicing operation, the reversal time of the package is made longer than the predetermined time. By doing so, the threads wrapped around the outer periphery of the core tube, etc. of the package can be removed more reliably.

[Example] Preferred embodiments of the present invention will be described based on the accompanying drawings.

As shown in FIG. 2, the automatic winder 1 has a spinning bobbin 2.
The yarn 3 is wound up while rotating the package 6 by a drive drum 5 driven by a motor controlled by a single-spindle inverter, via a slab catcher 4 equipped with abnormal yarn detection and yarn cutting functions. During this winding, if the slab catcher 4 detects an abnormal yarn, it cuts the abnormal yarn 5.
After cutting, the suction mouth 7 on the package 6 side is brought close to the outer circumferential position 8 of the package 6, and the package 6 is rotated by the driving drum 5 in reverse order.
The yarn end on the side of the package 6 is suctioned with the suction mouth 7 on the side of the spinning bobbin 2. The yarn end on the package 6 side is suctioned with the mouse 10, and the suctioned yarn end is guided to the yarn splicing device 9 to perform yarn splicing.8 During the yarn splicing operation, the yarn end on the package 6 side
1!1! When suctioning with the J suction mouth 7, the yarn end of the package 6 is not necessarily on the outer circumferential surface of the package 6, and depending on the traverse position at the time of cutting, the yarn end may fall from the package 6, causing the yarn end of the package 6 to traverse. In that case, as shown in Fig. 1, the suction mouth 7
The suctioned yarn 11 becomes the second main yarn 11, and the yarn end 12 is wrapped around the outer periphery of the core tube 13 of the package 6, and the suction mouth 7 sucks the yarn 11 that is loosened due to the reversal of the package 6. If the suction mouth 7 suctions the two main threads 11, the slab catcher 4 detects this, cuts the double system, and outputs a double thread signal. The heavy yarn signal is stored in the memory 15 associated with the inverter control device 14, and the yarn splicing operation is performed again9.During the yarn splicing operation again, the inverter control device 14 receives 2g! from the memory 15! The motor 16 is operated based on the yarn memory signal to reverse the package 6. The package 6
A feature of the present invention is that the reversal time is configured to be longer than a predetermined time.

Next, the operation of this embodiment will be explained.

When the yarn end 12 suctioned by the suction mouth 7 wraps around the core tube 13 of the package 6 during the yarn splicing operation.

The suction mouth 7 suctions the thread 11 that has become loose due to the reversal of the package 6, and the suctioned thread 11 becomes the main thread 11.
Then, the slab catcher 4 detects this, stores the double thread signal in the memory 15, and
The main yarn 11 is cut and the yarn splicing operation is performed again. When the yarn splicing operation is started again, the inverter control device 14 operates the motor 16 based on the double yarn memory signal to reverse the pan cage 6. The content of the 2'ifL thread storage signal is predetermined and is longer than the previous package reversal speed and reversal time.

Therefore, if the yarn end 12 wound around the core tube 13 of the package 6 cannot be unraveled to a point where the circumferential length of the core tube 13 is shorter than the circumferential length of the package 6 during the previous reversal time of the package 6. However, as mentioned above, if the reversal time of the package 6 is long, the yarn end 1 wound around the core tube 13 of the package 6
3 is loosened more reliably and sucked into the suction mouth 7 on the package 6 side located at a position 8 near the outer periphery of the package 6.

As shown in 2, since the reversal time of the package 6 during the yarn splicing operation is longer than the predetermined time, the yarn wrapped around the core tube of the bar cage 6 can be completely removed. Normal thread splicing will not be possible due to the thread being wrapped around the core tube, etc., and the thread splicing operation will not stop. When there is a double thread, the slab catcher detects this and 22I! We have explained the case where the yarn is cut and the yarn splicing operation is performed again after cutting, but if the slab catcher is
The slab catcher may be constructed so that when a double yarn is detected, the double yarn is thermally cut and the splicing operation is performed again.

[Effects of the Invention] According to the present invention, it is possible to completely remove the yarn wrapped around the outer circumference of the core tube of the package.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing one embodiment of the present invention, and FIG. 2 is a schematic side view of an automatic winder. In the figure, 2 is a spinning bobbin, 3 is a yarn, 4 is a slab catcher, 5 is a driving drum, 6 is a package, 7 is a suction mouth, 9 is a yarn splicing device, 12 is a yarn end, 14 is an inverter control device, 16 is a motor 9 Patent applicant: Murata Kitsuki Co., Ltd. Representative patent attorney: Nobuo Kinutani Figure 2 76.8-ta

Claims (1)

[Claims] 1. A drive drum driven by an inverter-controlled motor rotates the package to wind the yarn from the spinning bobbin. A slab catcher detects and cuts any abnormalities in the yarn during winding. After cutting, the package is held for a predetermined period of time. When the yarn end on the package side is suctioned by the suction mouth while reversing the direction and the suctioned yarn end is guided to the yarn splicing device for splicing, when the double yarn is suctioned by the suction mouth, the slub catcher A method for processing double yarn on the package side, characterized in that this is detected and the reversal time of the package is set to be longer than the predetermined time during the next yarn splicing operation.