JPH0342468A - Thread end drop preventing method - Google Patents

Abstract

PURPOSE:To prevent the thread end of a package with an end breakage from being dropped from the end section of the package by moving the thread end to the center of the package by air before the package is stopped. CONSTITUTION:When an end breakage signal is generated, a suction mouth 3 starts to be rotated and moved upward. When the tip opening section 3C of the suction mouth 3 is moved near a contact section between a package 1 and a drum 2, a sucking force is applied to the thread end A of the package 1 rotated positively. When the opening section 3C of the suction mouth 3 is moved to the rotating end, a braking force is applied to the package 1 for ending, and the package 1 is decelerated. The centrifugal force applied to the thread end A is gradually decreased, the thread end A with a reduced centrifugal force is rotated and moved toward the package center by receiving a sucking force in the axial direction of the suction mouth 3. The thread end A is withdrawn toward the package center, and the end drop of the thread end A can be prevented.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for preventing the end face of yarn from falling off, and particularly relates to a method for preventing the end face of yarn from falling off from the end of the package. This relates to a method for preventing falls.

[Prior Art] Generally, in a winder, as shown in FIG. 7, a cheese or cone-shaped package is formed for winding yarn from a spinning bobbin or the like.

This package 1 is rotationally driven by coming into contact with a rotationally driven drum 2. Further, during winding, a defective portion of the yarn is detected, and when the defective portion of the yarn is detected, the yarn is cut by mechanical or electrical means.

When such a yarn breakage occurs, a yarn end on the package side and a yarn end on the yarn supply side are formed, and these yarn ends are spliced.

When splicing the yarn end A on the package side, the rotationally driven package 1 is decelerated and stopped, and then the package 1 is driven in reverse rotation while suctioning the yarn end B from the package surface with the suction mouth 3.

[Problems to be Solved by the Invention] By the way, when yarn breakage occurs during such winding, since the package 1 is rotating, the yarn end A
is rotated by centrifugal force, and when the package 1 is decelerated for splicing, the centrifugal force acting on the yarn IA gradually becomes smaller. As a result, the yarn end A becomes unstable, and there is a problem in that it gets caught up in static electricity and wind generated by the rotation of the drum and falls off the end face of the package.

The present invention has been devised to effectively solve the above problems.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for preventing yarn ends from falling off by bringing the yarn ends closer to the center of the package.

[Means and effects for solving the problems] The present invention provides a winding method in which yarn is wound by a package that is rotationally driven on a drum, and the package is stopped in order to splice the yarn end when the yarn breaks. A suction mouse is moved close to the package in front of the package to suck the yarn end toward the center of the package, and the suction force holds the yarn end on the package surface.

In addition, in a winding method in which yarn is wound in a package that is rotatably driven on a drum, and the package is stopped in order to splice the yarn end when the yarn breaks, an air nozzle is used to send air from an air nozzle toward the front of the center of the package before stopping the package. The yarn ends are drawn toward the center of the package by being sprayed with air, and the yarn ends are held on the package surface using pressurized air.

[Actual example] Hereinafter, one embodiment of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIGS. 1 and 2, a rotatably driven package 1 is formed in the winder, and this package 1 is in surface contact with a rotatably driven drum 2. As shown in FIGS. The drum 2 drives the package 1 in forward rotation during winding, and after decelerating and stopping the package 1 during yarn splicing, drives the package 1 in reverse rotation.

Further, below the drum 2, a sacsicon mouse 3 is supported so as to be freely rotatable in the vertical direction, to suck and pull out the yarn IA from the package 1, which is driven to rotate in reverse so as to splice the yarn when the yarn breaks. The suction mouth 3 is curved from its base end 3a to its distal end 3b and has a passage cross-sectional area that gradually increases. An opening 3c with a rectangular cross section is formed.

In particular, when a yarn breakage occurs, the suction mouth 3 is moved close to the package 1 before the pub gauge 1 stops, and the drum 2 is driven to rotate at a reduced speed while sucking the yarn end A from the package 1. That is, before the package 1 is driven to reverse rotation for yarn splicing, the yarn end A of the package 1, which is rotating by inertia in the forward direction, is sucked toward the center of the package.

Specifically, as shown in FIG. 3, when a thread breakage signal is received, the succinct mouse 3 starts to rotate upward.

When the tip opening 3c of the suction mouth 3 moves close to the contact area between the package 1 and the drum 2, a suction force acts on the yarn end A of the package 1 which is being rotated in the forward direction.

Further, when the opening 3c of the succinct mouth 3 moves to the rotation end, a braking force is applied to the package 1 for splicing, and the package is decelerated. Therefore, the centrifugal force acting on the yarn end A gradually becomes smaller.

The yarn end A, which has a reduced centrifugal force, rotates and receives a suction force in the axial direction of the suction mouth 3, and moves toward the center of the package.

After the pub gauge 1 is decelerated and stopped, when it is driven to rotate in reverse, the yarn end A is sucked into the suction mouth 3 which rotates downward and is pulled out from the package 1 for splicing.

In this way, when there is a thread breakage and the package 1 is rotating forward before stopping, the suction force by the suction mouth 3 acts on the thread end A, so the thread @A is pulled toward the center of the package, causing the end surface of the thread end A to fall off. This can be prevented.

Next, in FIGS. 4 and 6, before the package 1 is stopped, air B is blown from the air nozzle 11 toward the front of the center of the package to draw the yarn end A toward the center of the package.

In FIG. 4, a cone-shaped package 1 that is in surface contact with the drum 2 is rotatably driven, and a slab catcher 12 is provided below the drum 2, and this slab catcher 12 catches yarn defects. The thread is cut when you press it.

Therefore, when the yarn is cut, a yarn end A is formed on the package 1 side.

In particular, a pair of air nozzles lla and llb are provided on the sides of the contact area between the package 1 and the drum 2, and a connecting pipe 13a connected to these air nozzles 11a and 11b,
Air pipe 1 is connected to 13b via solenoid valve 14.
5 is connected. The solenoid valve 14 opens the connecting pipes 13a and 13b when a thread cutting signal is transmitted from the slab catcher 12. Therefore, the air B is blown out from the air nozzle 11 at the same time as the thread breaks. Each nozzle 11a.

11b is directed toward the front of the center of the package from both ends of the package axis.

That is, as shown in FIG. 5, air B is blown out from the air nozzle 11 at the same time as the yarn breaks, and when the air B is blown out, the yarn rRAA is pushed toward the center of the pub gauge before being wound around the package 1. become.

Also, at the same time as the thread breaks, package 1 is decelerated and air B
will continue to be blown out until package 1 stops. After the package 1 is stopped, it is driven to rotate in reverse to splice the yarn.

In this way, the yarn end A is pushed out and pulled toward the center of the package by the air B, so that it is possible to prevent the yarn @A from falling off the end surface.

6th rj! In i, a slab catcher 12 is provided below the drum 2, and a package 1 which is rotationally driven on the drum 2 is placed in a U-shaped open cradle 1.
It is held at 6.

Air nozzle 11 is installed in the circular tip of this cradle 16.
a and 11b are open from the end of the package l toward the center front of the drum 2. This air nozzle lla,
Connecting pipes 13a and 13b are connected to the connecting pipes 13a and 13b, and an air pipe 15 is connected to the connecting pipes 13a and 13b via a forked pipe joint 17.
A solenoid valve 14 for opening and closing is provided. The solenoid valve 14 opens the air pipe 15 in response to a thread cutting signal output from the slab catcher 12.

Therefore, the fact that the yarn has been cut by the slab catcher 12 is transmitted to the solenoid valve 14, and the air B is blown out from the air nozzle 11 to the front of the center of the drum, grazing the end of the package 1 at the same time as the yarn is cut. Air B is blown from the time the yarn breaks until the yarn @A is wound around the package 1. Therefore, the yarn end A is held so as to flow in the center of the drum, and does not fall off the end surface of the package.

[Effects of the Invention] In short, according to the present invention, since the yarn end is moved to the center of the package by air before the package is stopped, it is possible to prevent the end surface of the yarn end from falling off.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing one embodiment of the present invention, and FIG. 2 is a perspective view showing one embodiment of the present invention.
Figure 3 is a time chart of the suction mouse, Figure 4 is a perspective view showing the state of air blowing, Figure 5 is a time chart of air blowing, and Figure 6 is a time chart of air blowing. The perspective view and FIG. 7 are side views showing a conventional example. In the figure, 1 is a package, 2 is a drum, 3 is a suction mouth, and 11 is an air nozzle.

Claims (1)

[Claims] 1. In a winding method in which yarn is wound by a package that is rotatably driven on a drum, and the package is stopped in order to splice the yarn end when the yarn breaks, the package is attached to the package before the package is stopped. move the mouse close to
A method for preventing yarn end faces from falling off, characterized in that the yarn ends are suctioned toward the center of the package. 2. In a winding method in which yarn is wound by a package that is rotatably driven on a drum, and the package is stopped to splice the yarn end when the yarn breaks, air is blown from an air nozzle toward the front of the center of the package before stopping the package. A method for preventing yarn ends from falling off, characterized by blowing and pulling the yarn ends toward the center of the package.