JP3159120B2 - Automatic winder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic winder for winding a yarn unwound from a yarn supplying bobbin into a winding package while bringing the winding package into contact with a rotating drum.

[0002]

2. Description of the Related Art Generally, in an automatic winder configured by arranging a plurality of winding units in parallel, one having an automatic yarn splicing device in each winding unit is used. In this type of automatic winder, the yarn pulled out from the yarn supplying bobbin at a high speed is wound on a winding package which rotates while being in contact with a rotating drum having traverse grooves. A yarn clearer is disposed near the yarn splicing device, and monitors for defects such as slabs in the yarn drawn from the yarn supplying bobbin.
When a yarn defect is detected by the yarn clearer, the drum is stopped, the running yarn is forcibly cut by a cutter built in the yarn clearer, and then the yarn splicing device is operated to remove the yarn defect and wind the yarn. The upper thread on the take-up package side and the lower thread on the yarn supply bobbin are spliced, and winding is resumed. The upper yarn is guided to the yarn splicing device by a rotating suction mouth, and the lower yarn is guided to the yarn splicing device by a rotating relay pipe.

[0003]

In a conventional automatic winder as described above, when a yarn defect larger than a predetermined thickness is detected by using a yarn clearer, the yarn is cut immediately by a cutter built in the yarn clearer. And the rotating drum is stopped. At this time, the yarn defect is wound up by the winding package due to the inertial rotation of the rotary drum, but can be entirely removed by suction using a suction mouth that rotates during a series of subsequent yarn joining operations. However, if the detected yarn defect is thicker than the normal thickness but smaller than the predetermined thickness, the running yarn is not immediately cut off, and the yarn is removed only when the slightly thick yarn defect continues for a predetermined length. Is disconnected. In this case, a long yarn defect would be wound up by the winding package, and it was not possible to remove all of the suction with a suction mouth that swirled during a series of yarn joining operations. Therefore, when the slightly long yarn defect is wound up by the winding package, the automatic winder is stopped, an alarm is issued, and the long yarn defect is manually pulled out and removed by the operator.

[0004] In order to remove long yarn defects in this manner, there is a problem that the defect must be removed manually and the efficiency is greatly reduced because the automatic winder is stopped.

The present invention has been made in view of the above problems, and has as its object to provide an automatic winder capable of automatically and efficiently removing a long yarn defect even if it is wound up in a winding package. Is to provide.

[0006]

In order to achieve the above object, the invention according to claim 1 detects a yarn defect of a running yarn.
To detect the yarn defect detected by the
Cutting means for forcibly cutting the running yarn by operating
Suction captures the upper thread on the take-up package side and guides it to the yarn joining device
And a winding unit for performing the yarn splicing operation.
And a central processing unit for controlling the threading unit. In an automatic winder for winding the yarn unwound from the yarn supplying bobbin into a winding package while bringing the winding package into contact with a rotating drum, the central processing unit includes a yarn splicing device. Upper thread suction means in operation
With the rotating drum while sucking the upper thread on the winding package side.
When the yarn defect is sucked and removed by reverse rotation, the yarn defect detection means
The upper thread suction means moves the winding path according to the detected yarn defect length.
Change the amount of rotation of the rotating drum when facing the package
Control the yarn splicing operation to change the yarn defect removal length
Characterized in that it. In the present invention, upon detecting a yarn defect by the yarn defect detecting means, Ru predetermined yarn defect removing process after cutting the yarn is performed at the cutting means. In the yarn defect removal processing
Depends on the yarn defect length detected by the yarn defect detection means.
Rotation with the yarn suction means facing the winding package
The reverse rotation amount of the drum is changed. Detected by yarn defect detection means
If the length of the thread defect is long, the upper thread suction means
Increase the amount of reverse rotation of the rotating drum when facing the package.
If the length of the comb defect is short, the upper thread suction means
Amount of rotation of the rotating drum in the state facing the picking package
And the yarn defect removing operation can always be automatically performed regardless of the length of the yarn defect.

According to a second aspect of the present invention, a yarn defect detecting means is provided.
Indicates the number of types detected from the thickness and length of the detected yarn defect.
Output to the central processing unit to detect the yarn defect.
The central processing unit having means for determining the type of the output signal,
Upper thread suction means according to the type of input thread defect detection signal
Of the rotating drum opposite to the winding package
The amount of transfer was changed .

According to a third aspect of the present invention, a running yarn breakage is provided.
Yarn defect detecting means for detecting points;
A cutting hand that forcibly cuts the running yarn by operating based on point detection
The step and the lower thread on the supply side held by the yarn trap are sucked.
Lower yarn suction means for catching and guiding to the yarn joining device, and yarn joining operation
A central processing unit that controls the winding unit to perform
The winding package comes into contact with the rotating drum.
The yarn unwound from the yarn supplying bobbin is wound into a winding package.
In an automatic winder, the central processing unit
A long yarn defect is detected by the point detection means, and the running yarn is cut.
Then, the upper thread on the winding side and the lower thread on the feeding side are spliced and wound.
The yarn is connected between the yarn supply side and the yarn supply side.
Absorb the yarn defect into the yarn trap while reversing the rotating drum.
After pulling and removing, the yarn cutting and splicing operation is again performed by the cutting means.
After joining the yarn on the winding side and the yarn on the yarn feeding side
Controlling the winding unit to restart winding
Features . In this invention, by rotating the rotating drum in a state where the yarn is connected between the winding side and the yarn supply side ,
The yarn is sucked into the yarn trap to remove the yarn defect.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings, but the present invention is not limited to the embodiments without departing from the spirit of the present invention.

In FIG. 1, reference numeral 1 denotes a take-up unit. A large number of take-up units 1 are arranged between a conveyor belt 16 for supplying an actual bobbin and a conveyor belt 17 for transferring an empty bobbin in the conveying direction. Thus, one automatic winder is configured. In each winding unit 1, the yarn Y pulled out from the yarn supplying bobbin 5 on the tray 7, which is a bobbin transport medium, is supplied to a balloon breaker 8, a yarn guide 9,
After passing through a tensor 10 and a yarn clearer 11, it is wound on a winding package 6 which rotates while being in contact with a traverse drum 12 which is a rotating drum. When a yarn defect is detected by the yarn clearer 11 as yarn defect detecting means during winding of the yarn, a cutter (not shown) as cutting means built in the yarn clearer 11 operates to remove the traveling yarn Y. Disconnect forcibly.

When the running yarn Y is cut by a cutter built in the yarn clearer 11, the winding rotation of the traverse drum 12 is stopped. At this time, the upper thread on the winding package 6 side is wound as it is on the winding package 6 by the inertial rotation of the traverse drum 12, and the yarn supplying bobbin 5
The lower thread is sucked and held by a yarn trap 3 disposed near and below the yarn clearer 11.

Thereafter, a normal yarn joining operation as described below is performed. First, the suction pipe 13 as the upper thread suction means and the relay pipe 15 as the lower thread suction means start turning. By starting the reverse rotation of the traversing drum 12 in a state where the suction pipe 13 is turned to the uppermost position, that is, in a state where the traverse drum 12 is opposed to the winding package 6, the upper thread of the winding package 6 is suctioned and captured by the suction pipe 13. can do. By rotating the traversing drum 12 backward for the first set time T1 while maintaining the state, the yarn having the first length L1 wound on the winding package 6 is removed by suction. Then, the suction pipe 13 performs a return turning operation, and guides the upper yarn on the winding package 6 side that is being sucked to the yarn joining device 14. Similarly, the turning operation of the relay pipe 15 causes the lower thread on the yarn supplying bobbin 5 side held by the yarn trap 3 to be connected to the yarn joining device 1.
Lead to 4. The upper yarn and the lower yarn are connected to the yarn joining device 1.
After being joined by the injection air or the like in 4, rotation of the traverse drum 12 in the winding direction is started to restart winding.

When the winding is advanced and the yarn supplying bobbin 5 becomes empty, the bobbin change mechanism 20 activates the empty bobbin to the empty bobbin conveying conveyor belt 17 and winds the bobbin from the bobbin supplying conveyor belt 16. The next yarn feeding bobbin 5 is taken into the unit 1 and positioned at the winding position 21. After the yarn is drawn out from the yarn feeding bobbin 5 and spliced in the same manner as described above, the winding direction of the traverse drum 12 is performed. Is started and winding is resumed.

Next, detection of a yarn defect by the yarn clearer 11 will be specifically described. Yarn clearer 11
Is to detect the properties such as the thickness of the yarn passing through the optical or capacitance type, and distinguishes the yarn defects into a plurality of types according to the detected thickness and length. For example, as a first yarn defect, when the thickness of A% (for example, twice or more) of the normal thickness continues for the length of A '(for example, several cm), the yarn is cut and the first yarn defect detection signal a1 is output. Is output. Further, as a second yarn defect, when the thickness of B% (for example, ± several tens%) of the normal thickness continues for the length of B '(for example, several tens of cm),
The yarn is cut and a second yarn defect detection signal a2 is output. Further, when the thickness (slightly thick) of C% (for example, ± several%) of the normal thickness continues for the length of C ′ (for example, several meters), the yarn is cut and the third yarn defect detection signal a3 is output. I do.
As described above, the yarn clearer 11 outputs a plurality of types of yarn defect detection signals a determined from the thickness and length of the detected yarn defect.
1 to a3 are output.

The yarn defect detection signal output from the yarn clearer 11 is input to a central processing unit 23 provided in an automatic winder. The central processing unit 23 has means for judging a yarn defect detection signal, and in accordance with the signal, controls the operation of the traverse drum 12, the yarn joining device 14, the bobbin change mechanism 20, and a motor (not shown) for the yarn joining operation. I do.
When the central processing unit 23 receives the yarn defect detection signal a1 or a2, the central processing unit 23 controls the winding unit 1 to perform the normal yarn splicing operation as described above. The winding unit 1 is controlled to perform the yarn splicing operation for a long defect.

[0016]

First Embodiment First, a first embodiment will be described with reference to FIG. In this embodiment, when a yarn defect is detected by the yarn clearer 11, the yarn is cut by a cutter built in the yarn clearer 11, and the rotation of the traverse drum 12 in the winding direction is stopped. Since the yarn is cut when the drum is suddenly stopped, it is possible to prevent the yarn from dropping due to slackness caused by a sudden decrease in the yarn tension. Then, based on the yarn defect detection signal a from the yarn clearer 11, it is determined whether the detected yarn defect is a long defect. In the case of a short defect, that is, in the case of the yarn defect detection signal a1 or a2, the normal yarn is detected. A splicing operation is performed. In this normal yarn splicing operation, the drum reversing time for removing the yarn defect is T1, and the length of the yarn defect that can be removed is L1 (A '<B'<L1<C'). Then, after performing the normal yarn splicing operation, the rotation of the traverse drum 12 in the winding direction is started to restart the winding.

If the detected yarn defect is determined to be a long defect based on the yarn defect detection signal a from the yarn clearer 11, that is, if it is determined to be the yarn defect detection signal a3, the normal A yarn splicing operation for a long defect different from the yarn splicing operation is performed. In the yarn splicing operation for this long fault,
When removing the yarn defect, the reverse rotation time of the traverse drum 12 in a state where the suction pipe 13 faces the winding package 6 is T2 (T2> T1). As a result, the yarn defect length that can be removed is L2 (L2> C ′> L1). The procedure of the yarn splicing operation is the same as the normal yarn splicing operation, and a description thereof will be omitted. Then, after performing the yarn joining operation for such a long yarn defect, rotation of the traverse drum 12 in the winding direction is started to restart winding.

[0018]

Second Embodiment Next, a second embodiment will be described with reference to FIG. In this embodiment, when a yarn defect is detected by the yarn clearer 11, the yarn is cut by a cutter built in the yarn clearer 11, and the rotation of the traverse drum 12 in the winding direction is stopped. Since the yarn is cut when the drum is suddenly stopped, it is possible to prevent the yarn from dropping due to slackness caused by a sudden decrease in the yarn tension. Then, based on the yarn defect detection signal a from the yarn clearer 11, it is determined whether the detected yarn defect is a long defect. In the case of a short defect, that is, in the case of the yarn defect detection signal a1 or a2, the normal yarn is detected. A splicing operation is performed.

On the other hand, in the case of a long defect, that is, in the case of the yarn defect detection signal a3, winding is resumed after performing a yarn joining operation for a long yarn defect as described below. First, a normal yarn joining operation is performed. In this yarn joining operation, first, the yarn defect having the length L1 is removed, but not all of the long yarn defect (length C ') cannot be removed. Then, after the splicing, in a state where the yarn on the winding side and the yarn on the yarn supplying side are connected, the tensor 1
The traverse drum 12 is rotated in the reverse direction while closing 0 to stop the supply of the yarn on the yarn supply side. At this time, the yarn is slackened between the winding side and the yarn supplying side, and the yarn trap 3 serving as the suction means is driven by suction, so that the yarn unwound from the winding package 6 naturally flows into the yarn trap 3. Inhaled. Then, while monitoring whether or not there is a yarn in the yarn clearer 11, the traverse drum 12 continues to reversely rotate until the set time has elapsed. When a yarn break occurs during the reverse rotation of the drum and the yarn clearer 11 detects that there is no yarn, the reverse rotation of the traverse drum 12 is stopped, and the remaining amount of reverse rotation of the drum is calculated based on the amount of reverse rotation of the drum up to that time. Then, based on that, the set time is rewritten, and after the normal yarn joining operation is performed again, the remaining yarn defect is removed based on the rewritten set time. In this way, even during yarn defect removal, monitor for yarn breakage,
When a yarn break is detected, the remaining portion is then removed based on the amount of drum reversal up to that point, so that long yarn defects can be reliably removed and unnecessary traverse drum 12 reversal is eliminated. Can be.

When the drum reverse rotation time exceeds the set time and the remaining yarn defects among the long yarn defects reach a length (L1) that can be removed by a normal yarn joining operation, the yarn clearer 11
After the yarn is cut by the built-in cutter, the reverse rotation of the traverse drum 12 is stopped, the normal yarn splicing operation is performed again, and the winding side yarn and the yarn supply side yarn are spliced. The rotation of the drum 12 in the winding direction is started to restart the winding.

Although not shown in the flowcharts of FIGS. 2 and 3, when a long yarn defect is detected, the number of times the yarn feeding bobbin 5 is checked, and when the set number of times is reached, the bobbin change mechanism 20 is activated. The yarn feed bobbin 5 is discharged by being operated. In this way, by determining the defect of the yarn supplying bobbin 5 in accordance with the number of times of detection of the long yarn defect on the same yarn supplying bobbin 5, the yarn defect such as mixing of a different number of yarns is determined. In the case where the entirety of the yarn is present, it can be detected at an early stage and the bobbin can be replaced, and when the yarn defect is partial, only the yarn defect can be removed and the yarn supplying bobbin 5 can be used effectively.

In the first and second embodiments, the detection of the amount of reverse rotation of the drum when removing the yarn defect is performed by monitoring the reverse rotation time of the drum. The number may be monitored. As a means for changing the drum reverse rotation amount, besides changing the drum reverse rotation time, the drum reverse rotation speed can be changed.

As described above, in the present embodiment, the yarn defect removal length is changed according to the yarn defect length detected by the yarn clearer 11, so that a long yarn defect is also automatically removed. Thus, the yarn defect removing process can be performed efficiently.

In particular, in the first embodiment, the amount of reverse rotation of the drum when removing the yarn defect by the suction pipe 13 is changed, that is, the amount of the yarn on the winding package 6 side sucked by the suction pipe 13 is changed. Thus, the yarn defect removing length is changed, so that a long yarn defect can be automatically and efficiently removed.

In the second embodiment, as a yarn splicing operation for a long yarn defect performed when a long yarn defect is detected, a normal yarn splicing operation, subsequent yarn defect removal by the yarn trap 3, and After that, it includes the normal yarn splicing operation performed again,
The winding unit 1 may have a structure capable of performing only a normal yarn splicing operation. For example, the present invention is also applicable to a case where a plurality of winding units 1 are subjected to a yarn splicing operation from one drive source via a line shaft. it can.

[0026]

The present invention is configured as described above.
The following effects are obtained. According to the first or third aspect of the present invention, even when a long yarn defect is detected by the yarn defect detecting means, the long yarn defect can be automatically and efficiently removed. In addition, when a yarn defect is detected, the yarn is cut when the rotary drum is stopped. Therefore, it is possible to prevent the yarn from dropping due to the sudden stop of the rotary drum, and to reliably remove the yarn defect to be performed thereafter. (2 ) According to the first aspect of the present invention, the amount of reverse rotation of the rotating drum performed while sucking the upper thread by the upper thread suction means by the upper thread suction means is changed simply and shortly without performing the splicing a plurality of times. It is possible to remove long yarn defects in a long time. According to the third aspect of the invention, even when there is no drive source for the yarn splicing operation for each winding unit, long yarn defects can be reliably removed without stopping the machine.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a winding unit showing an embodiment of the present invention.

FIG. 2 is a flowchart illustrating a first embodiment.

FIG. 3 is a flowchart showing a second embodiment.

FIG. 4 is a conceptual diagram showing how a long yarn defect is sucked into a yarn trap in a second embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Winding unit, 3 ... Yarn trap, 5 ... Yarn feeding bobbin, 6 ... Winding package, 11 ... Yarn clearer, 12 ... Twilling drum, 14 ... Yarn splicing device, 23 ... Central processing unit

Claims (3)

(57) [Claims] 1. A method for detecting a yarn defect of a running yarn.
Yarn defect detection means and yarn defect detection by the yarn defect detection means
A cutting means for operating to forcibly cut the running yarn, and a winding means
Suction to capture the upper thread on the package side and guide it to the splicer
Upper yarn suction means and winding unit for performing the yarn splicing operation
And a central processing unit that controls the reeling operation.The central processing unit controls the yarn splicing operation in an automatic winder that winds the yarn unwound from the yarn supplying bobbin into a winding package while abutting the winding package on a rotating drum . With needle thread suction means
Reverse the rotating drum while sucking the upper thread on the winding package side
When removing the yarn defect by suction, remove it with the yarn defect detection means.
Depending on the length of the drawn yarn defect, the upper yarn suction means
The amount of rotation of the rotating drum when facing the cage is changed.
Control the yarn splicing operation to change the yarn defect removal length.
Automatic winder, characterized in that that. 2. A yarn defect detecting means, comprising:
Detection of multiple types of yarn defects based on the thickness and length of the defects
The signal is output to the central processing unit, and the type of the yarn defect detection signal is determined.
The central processing unit with the means for determining
Depending on the type of the detection signal, the upper thread suction means
Change the amount of rotation of the rotating drum when facing the
Automatic winder according to claim 1, wherein that. 3. Detecting a yarn defect of a running yarn.
Yarn defect detection means and yarn defect detection by the yarn defect detection means
Cutting means for operating to forcibly cut the running yarn, and a yarn
The lower yarn on the yarn supply side held in the trap is sucked and captured and the yarn is spliced.
Lower thread suction means for guiding to the device, and for performing the yarn splicing operation
A central processing unit for controlling the winding unit.
The yarn feeding bobbin while the package abuts against the rotating drum.
Automatic yarn that winds the yarn unwound from
The central processing unit is long by the yarn defect detection means.
When the running yarn is cut due to the detection of a short yarn defect, the winding side
The upper thread and the lower thread on the feeding side are spliced and the winding side and the feeding side are connected.
The thread is connected between them and the rotating drum is reversed in that state.
After removing the yarn defect by suction into the yarn trap while rotating,
The yarn cutting and splicing operation is performed again by the cutting means, and the winding side
Winding is resumed after joining the yarn of
Characterized in that the winding unit is controlled to
Winder .