JPH0428672A - Stopping method for full pipe of automatic winder - Google Patents

Abstract

PURPOSE:To prevent generation of mistake in doffing without unnecessary thread winding by cutting a fed thread to stop the rotation of winding when a winding package reaches a specified length, and waiting the package under that conditions until doffing is carried out. CONSTITUTION:When a length specified unit (controller) 22 detects that a winding package P reaches a specified length, a full pipe signal is generated to move to a full pipe stop step. According to the full pipe signal, a cutter of a slab catcher 5 works to cut a fed thread Y. At the same time the unit 22 outputs a command to a splicer not to enter into a thread piecing operation, and actuates a brake to stop a drive drum 6 and put on a green lamp 10. A doffing carriage 23 which has sensed the ON operation of green lamp 10 outputs a command to a winding unit 21 to start piecing when the carriage 23 arrives at the position of the unit 21, and a specified doffing operation is started under the condition that the takeup of a bobbin thread is possible.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for winding a thread in an automatic winder.

[Prior Art] An automatic winder used in the process of rewinding yarn is designed to wind the yarn to a predetermined length while removing yarn defects in the supplied yarn.

As shown in FIG. 3, the winding unit 1 constituting this automatic winder receives the yarn Y from the yarn supply bobbin 2.
A guide 3, a ramp 4 that provides appropriate tension, and thread unevenness (
The winding package P is guided upward through a slab catcher 5 that detects yarn defects, and is wound by rotating the winding package P by a traversing drum 6 that breaks the ribbon as appropriate.

Further, a yarn splicing device (splicer) 7 is provided near the top of the slab catcher 5, and when a yarn defect is detected, it is immediately cut and removed, and the yarn ends on both sides are connected to a suction arm 8 and a suction mouth 9. After catching the yarn and guiding it to the yarn splicing device 7 and splicing the yarn, winding is continued.

When the winding package P becomes full (full winding), a green lamp (GL) 10 is turned on by a length fixing device (not shown), and a doffing cart (see Fig. (not shown) senses this and performs doffing (replacing the paper tube) of the winding unit 1.

This full-pipe signal de-energizes the ejection motor (not shown) of the traversing drum 6, and the drum 6 comes to a natural stop and waits in this state until it is doffed (see FIG. 4).

Problems to be Solved by the Invention] By the way, the above conventional method for stopping a full tube has the following problems.

- Since the inertial rotation time until the drum 6 comes to a natural stop is long, unnecessary thread (thread longer than a certain length) is wound.

■ Ribbon is not broken during inertia rotation, so a ribbon is formed on the surface of package P.

■ If the bobbin thread (thread on the yarn feeding bobbin side) runs out during inertia rotation, a doffing error will occur.

As a way to solve this problem, when the yarn is full, the yarn Y is cut to ensure a constant length, and the drum 6 is stopped after knotting is performed and the success or failure of the knotting is confirmed by yarn running. There is something.

In this way, the rotation time after the tube is full is shortened, the probability that the bobbin thread runs out is reduced, and the occurrence of ribbons is also reduced.

However, there is still a risk that ribbons may occur or the bobbin thread runs out due to the rotation for checking the thread splicing, and the thread Y is always cut when the pipe is full.
The number of yarn knots in the package increases by one, which leads to a deterioration in the quality of the package, especially if the yarn is spliced using a knotter.

In view of the above circumstances, the present invention was devised in order to provide a method for stopping a full tube of an automatic winder without the risk of ribbon generation or running out of bobbin thread, and without increasing the number of thread knots in the package.

[Means and effects for solving the problem] The present invention cuts the yarn feed when the winding package reaches a fixed length, stops the winding rotation, and performs doffing in this cut state. It will wait until it is done.

This method eliminates unnecessary rotation and also prevents yarn seams from entering the inside of the package.

〔Example〕

Embodiments of the present invention will be described below with reference to the accompanying drawings.

First, with reference to FIG. 2, a device (winding unit) for carrying out a method for stopping a full tube of an automatic winder according to the present invention will be explained.

This winding unit 21 includes a traversing drum 6, which is the same as the conventional one, and a green lamp 10, which is lit when the winding length is set.
, a splicer 7 for splicing yarns, a slab catcher 5 for detecting yarn defects, and a length fixing device 22 for detecting when the winding package P reaches a fixed length. There is. This length fixing device 22 also serves as a controller for controlling a predetermined winding operation, and its output section includes a drive motor and a brake (not shown) for the traverse drum 6, a green lamp 10, a splicer 7, and a slab catcher 5. are connected to each other, and are configured to operate these as appropriate.

Next, an embodiment of the present invention will be described with reference to FIG. In addition to the full tube stop process according to the present invention, the figure also shows the winding process and doffing process before and after the full tube stop process.

When starting winding, the traversing drum 6 of the winding unit 21 described above is rotated by the drive motor, and the winding package P (paper tube) is rotated in contact (ST
1) In this winding, yarn defects such as yarn unevenness are removed (cutting-splicing) by the slab catcher 5 and splicer 7 (ST 2), and the lengthening device 22 removes yarn defects such as yarn unevenness (cutting-splicing). When it is detected that P has reached a certain length (ST3), a full tube signal is issued (ST11), and the process moves to a full tube stop stroke.

In response to this full tube signal, the cutter provided in the slab catcher 5 is activated and cuts the yarn feed Y (ST12).
At the same time, the length fixing device 22 instructs the splicer 7 not to enter the yarn splicing operation, and also activates the brake to stop the drive drum 6 (ST13).
Then, turn on the green lamp 10 (ST14)
.

When the doffing truck 23 detects this green lamp 10 and arrives at the position of this winding unit 21 (S
T21) Instructs the winding unit 21 to splice the yarn. 5T22 > Makes bobbin thread take-up possible and enters the predetermined doffing operation. In other words, the winding package P of a fixed length is discharged. At the same time as discharging the paper onto a conveyor (not shown), the empty paper tube is set (5T23) in preparation for the start of the next winding.

In this way, when the yarn is full, the yarn feeder Y is cut and the winding rotation is only stopped to allow the yarn to be spliced, so there is no wasted yarn winding after the length has been determined, and the generation of ribbons is prevented. With,
There is no risk of running out of bobbin thread, so there are no doffing mistakes.

Furthermore, since the cut yarn Y is spliced during doffing, the joint does not enter the winding package P, and the quality of the winding package P does not deteriorate.

Note that it is desirable that the doffing cart 23 be equipped with a sensor for confirming the success or failure of bobbin thread removal, so that when bobbin thread removal fails, a command is immediately given to re-splicing.

Further, in this embodiment, a slab catcher is used to cut the yarn Y, but a separate cutter may be provided to cut the yarn Y.

Furthermore, as another method to achieve the purpose of the present invention, it is also possible to cut the yarn when the tube is full, perform only the yarn splicing, and then stop the drum without starting it to confirm this. However, the following issues remain.

In other words, if you do this, the yarn will wait until it is doffed in a loosely connected state, so when the yarn breaks, the bobbin yarn will be sucked into the yarn trap that catches the yarn end.
Vibration occurs. This may cause the thread to be cut at the start of the drum after doffing, resulting in a doffing error.

The present invention prevents the occurrence of such cracks.

[Effects of the Invention] In short, the present invention provides the following excellent effects.

(1) When the winding package reaches a fixed length, the yarn is cut, the winding rotation is stopped, and the cut package waits until it is doffed. There is no wasted thread winding, ribbons can be prevented, and
The bobbin thread is secured and doffing errors do not occur.

(2) The seam of the thread splicing does not enter the package, so there is no deterioration in the quality of the wound package.

[Brief explanation of the drawing]

Fig. 1 is a flowchart showing an embodiment of the automatic winder full pipe straightening method according to the present invention, Fig. 2 is a main part configuration diagram showing a winding unit for carrying out this method, and Fig. 3 is a conventional method. FIG. 4 is a side view of an automatic winder for explaining the method for straightening a full tube in a conventional automatic winder. FIG. In the figure, P is a winding package and Y is a yarn supply. Patent applicant Murata Machinery Co., Ltd. Agent Patent attorney Nobuo Kinutani (1 other person) Figure 4

Claims (1)

[Claims] 1. An automatic winder characterized in that when the winding package reaches a fixed length, the yarn is cut, the winding rotation is stopped, and the winding package waits in this cut state until it is doffed. How to stop a full tube.