JPH076103B2 - Thread withdrawal method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a yarn winding machine which detects and eliminates a cycle deviation occurring in a process of drawing a yarn end from a winding package side by a suction mouth at the time of yarn splicing. The present invention relates to a thread drawing method.

[0002]

2. Description of the Related Art In a yarn spinning machine, two yarns fed from two packages on the yarn supplying side are combined into one yarn shape and traversed on a core tube to form a winding package. It has become.

When a yarn breakage occurs during the operation, the yarn end is pulled out from the yarn layer surface by a suction mouth while rotating the winding package in the reverse direction, and the yarn end is separated into two yarns. A method has been proposed in which the yarn is spliced to two yarn ends on the yarn supplying side guided to the yarn splicing part by the intermediate splicing pipe and single yarns. In this yarn joining method, since the two yarn joining portions are displaced in the yarn direction, they can be formed so that the seams are displaced.
The seam can be made smaller and inconspicuous as compared with the case where the yarn is spliced as it is.

[0004]

By the way, when the yarn end is pulled out from the winding package by the suction mouth, two yarns are not pulled out at the same time due to the fluff entanglement, and one yarn is pulled out first, and the winding package is Or, after reverse rotation several times, the other thread may be pulled out. In this way, when the two yarns are separated from each other and drawn with a deviation of one cycle or several cycles, that is, when the yarns with a deviation of the cycle occur, the two threads are permanently aligned in one thread shape. If the yarn splicing is carried out as it is, there will be an abnormal winding package.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a yarn drawing method for a yarn spinning machine, which can detect and eliminate the occurrence of a yarn misalignment with a period shift.

[0006]

In order to achieve the above object, according to the present invention, when a yarn end is pulled out from a winding package by a suction mouth for yarn splicing, is the yarn to be pulled out divided into two? It detects whether or not, and when it is separated, traverses one of the preceding threads and cuts the winding package in reverse 1.
After the rotation, the yarn end drawing operation is performed again.

[0007]

First, when the yarn end is pulled out by the suction mouth from the winding package for splicing, the number of yarns to be pulled out is two.
It is detected whether or not the book is divided. If it is not known, the yarn splicing is continued as it is because it is normal.

However, when the yarn to be drawn is divided into two yarns, so-called period deviation yarn splitting occurs, so that yarn splicing is not performed and first traverse during yarn drawing is performed. The yarn is cut and the winding package is rotated once in reverse. As a result, the other yarn is pulled out by one rotation, and when the two yarns are deviated by one period, the period deviation is eliminated and the two yarns are aligned in one yarn shape.

Then, the drawing operation of the yarn end is again performed by the suction mouth, and when the drawn yarn is not divided into two yarns, the yarn joining is continued. 2
When the two yarns are deviated by several cycles, the yarn end drawing operation is performed several times, and when the two yarns are aligned into one yarn, the yarn joining is continued.

[0010]

An embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

In FIG. 1, 1 is a yarn spinning machine, and 2 is a lower part.
The individual yarn supplying packages 2 are supported via the package supporting member 3, and a balloon breaker 4 and a yarn sensor 5 are provided above the yarn supplying packages 2, respectively. Above the yarn sensor 5, there is provided a yarn guide 6 which guides the two yarns Y1 and Y2 from the yarn feeding package 2 together into one, and above the yarn guide 6, one yarn guide 6 is provided. A tenser 7 for sandwiching the thread Y from both sides to apply a constant tension, and a cutter 8 for cutting the thread Y in response to a thread break signal from the at least one thread sensor 5 are sequentially provided.

On the other hand, a traverse drum 9 is horizontally provided above the cutter 8, and a core tube 10 is rotatably supported above the traverse drum 9 via a cradle arm (not shown). . The core tube 10 is brought into contact with the traverse drum 9 and rotated, and the combined yarn Y is wound on the core tube 10 while traversing the traverse drum 9 to form a package (referred to as a winding package). 11 is formed.

Between the cutter 8 and the traverse drum 9, a yarn end (also referred to as upper yarn) YA on the side of the winding package and a yarn end (also referred to as lower yarn) on the side of the yarn supplying package, which are cut by the cutter 8. A yarn splicing device 12 for splicing YB with each other is provided. When performing yarn splicing, at least one of the yarn supplying packages 2 has a yarn breakage. Therefore, the yarn supplying is changed, and the two yarn supplying devices are previously fed.
Lead to the top.

The yarn splicing devices 12 may be individually provided in a plurality of units of the yarn winding machine 1 arranged side by side, but as shown by phantom lines, the yarn splicing devices 12 are provided in a carriage 13 which runs along the units and is commonly used. You may do it.

The yarn joining device 12 is provided with two yarn joining portions 14 including a knotter and a splicer. These yarn splicing portions 14 are arranged so as to be displaced in the yarn direction so that the two joints do not overlap. In the vicinity of the yarn splicing portion 14, a suction mouth 15 and a relay pipe 16 are provided so as to be rotatable about horizontal swivel shafts 15a and 16a, respectively. The suction mouth 15 swivels upward from the lower standby position to approach the winding package 11, sucks the yarn end YA along with the reverse rotation of the winding package 11, and then swivels downward to pull out the yarn end YA. The yarn joining portion 14 is guided. The intermediate splicing pipe 16 swivels downward from the upper standby position to approach the vicinity of the yarn guide 6, sucks the yarn end YB on the yarn feeding side, and then swivels upward to pull out the yarn end YB and the yarn splicing portion 14 I will guide you to.

Above the yarn splicing portion 14, the suction mouth 1
A thread guide 1 for guiding the upper thread YA guided downward by 5.
7 is provided, and below the yarn joining portion 14, an upper yarn separating device 18 that divides an intermediate portion of the upper yarn YA into two single yarns Y1 and Y2 in the left-right direction and guides them to the left and right yarn joining portions 14 is provided. Has been.
Further, above the cutter 8, there is provided a lower thread separating device 19 which separates an intermediate portion of the lower thread YB into two single threads and guides them to the left and right thread joining portions 14.

As shown in FIG. 2, the thread guide 17 has two guide pieces 17a and 17b which are vertically spaced from each other.
Both guide pieces 17a, 17b have a groove width that allows the yarn YB traversed by the traverse drum 9 that rotates in the reverse direction at the time of drawing the yarn to have a groove width that is widened forward,
21 is formed. The groove width of the lower guide piece 17b is formed narrower than the groove width of the upper guide piece 17a, and it is detected whether or not the yarn to be pulled out is divided into two by facing both sides of the narrow guide groove 21. Pair of sensors 23 for
Is provided. The sensor 23 is composed of an optical sensor or the like.

On the other hand, on both sides of the upper guide groove 20, a pair of cutters 24 for cutting one of the preceding yarns Y1 by traversing when the yarn is drawn out is provided. Both cutters 24
Is composed of a fixed blade 24a and a rotatable movable blade 24b, and both movable blades 24b are simultaneously driven by a common air cylinder 26 via an operating arm 25.

The controller 27, which inputs the output signals of both the sensors 23 in order to cut only the one yarn Y1 preceding by the traverse with the cutter 24, has two yarns Y1 and Y1.
2 is detected at the same time, the other yarn Y2 is
The solenoid valve 28 for the air cylinder 26 is set to open in order to operate the cutter 24 after a lapse of a predetermined time from the separation to the separation.

After the cutter 24 is actuated, the controller 27 causes the traverse drum 9 to rotate in the opposite direction so that the winding package 11 rotates once, and then the suction mouth 15 pulls the yarn end YA again. It is set. When the sensor 24 does not detect the split yarn, the splicing is continued as it is, that is, the splicing such as separation of the upper yarn YA by the upper yarn separating device 18 is continued.

Next, the operation of the embodiment will be described. When at least one of the yarn sensors 5 detects the yarn breakage of the yarn supplying yarns Y1 and Y2 in the operating state of the yarn winding machine 1, the cutter 8 operates to cut the yarn Y. This prevents the problem that only one single yarn is wound on the winding package 11.

After the operation of the cutter 8, the yarn joining device 12 starts the yarn joining operation. First, the suction mouth 15 swivels upward from the standby position and approaches the winding package 11. At this time, the winding package 11 is reversely rotated so that the suction mouth 15 sucks the yarn end YA from the winding package 11. , The upper yarn YA is drawn from the winding package 11 while being turned downward, and is guided to the yarn joining portion 14. Suction mouse 1
The reverse rotation of the winding package 11 is stopped at the time when 5 has finished turning downward.

By the way, when the suction mouth 15 sucks the yarn end YA from the surface of the yarn layer of the winding package 11 which rotates in the reverse direction to take out the yarn, the two yarns Y1 and Y2 are usually combined into one yarn. In this state, the yarn is sucked into the suction mouth 15 as it is, but the yarn Y1 may be sucked first by the fluff entanglement, and then the other yarn Y2 may be sucked with a delay of one cycle or several cycles (FIG. 2). Shows the state where the two yarns are displaced by one cycle.)

When the yarn YA drawn from the winding package 11 is pulled out in a state in which the yarns are out of cycle, the two sensors 23 are divided into two yarns Y.
1 and Y2 are detected simultaneously. Then, as shown in the time chart of FIG. 3, the controller 27 activates the cutter 24 at t1 after a predetermined time elapses, and the two cutters 2 are operated.
4 will be simultaneously disconnected.

In this case, both yarns Y1 and Y2 are traversed with the reverse rotation of the traverse drum 9, but the above-mentioned time delay t1.
As a result, the preceding one yarn Y1 comes close enough to the one cutter 24, and the following other yarn Y2 comes sufficiently away from the other cutter 24.
Even if is activated, only the preceding yarn Y1 is cut.

During this time, as shown in FIG. 3, the traverse drum 9
Is reversely rotating, and after the cutter 24 is operated, the reverse rotation is stopped at t2 after one rotation of the winding package 11 has elapsed. The yarn Y2 that has not been cut is pulled out by one rotation of the winding package 11, and the deviation of one cycle between the two yarns Y1 and Y2 is eliminated.

Then, the yarn end YA is pulled out again by turning the suction mouth 15, and this time, the two yarns Y1 and Y2 are aligned in one yarn form, and the yarn splitting due to the cycle deviation occurs. If not, the piecing continues.

That is, when the yarn YA drawn from the winding package 11 by the suction mouth 15 is aligned in one yarn shape, the sensor 23 does not detect the two yarns Y1 and Y2 at the same time, and the cutter 24 operates. Without doing so, the upper yarn separating device 18 in the next step operates to separate the two single yarns Y1 and Y2 forming the upper yarn YA into the left and right, and each yarn is guided to the left and right yarn joining portions 14. In this case, the sensor 23 has two single yarns Y
Although 1 and Y2 are detected at the same time, the cutter 24 does not operate at this step or stage.
Next, the intermediate pipe 16 is swung downward from the standby position and the two yarn supply (bottom yarn) YBs prepared in the yarn guide 6 portion.
Is sucked, and is swung upward and guided to the yarn joining section 14. Next, the bobbin thread separating device 19 is operated to separate the bobbin thread YB into the right and left, and the respective threads Y1 and Y2 are guided to the left and right thread joining portions 14.
Then, the upper yarn YA and the lower yarn YB are spliced to each other by the yarn splicing unit 14, and then the operation of the yarn spinning machine 1 is restarted.

When the two yarns Y1 and Y2 are deviated by several cycles, the yarn end drawing operation is performed several times, and when the two yarns Y1 and Y2 are aligned into one yarn, The piecing will continue.

[0030]

In summary, according to the present invention, when the yarn end is pulled out from the winding package by the suction mouth,
When a yarn deviation with a cycle deviation occurs, the cycle deviation can be eliminated and the two threads can be aligned and drawn out as one thread, and normal yarn splicing is possible.

[Brief description of drawings]

FIG. 1 is a front view showing a yarn spinning machine to which the present invention is applied.

FIG. 2 is a perspective view of a main part in FIG.

FIG. 3 is a diagram showing an operation timing.

[Explanation of symbols]

 1 Compounding Machine 11 Winding Package 12 Yarn Splicing Device 15 Suction Mouse 23 Sensor 24 Cutter

Claims (1)

[Claims] 1. When pulling out a yarn end from a winding package by a suction mouth for yarn splicing, the number of yarns to be pulled out is 2.
It is detected whether or not it is broken into books, and when it is broken, one of the preceding yarns is cut by traversing, the winding package is rotated once in reverse, and then the above-mentioned yarn end drawing operation is performed again. A yarn withdrawal method for a yarn spinning machine, comprising: