EP1857394A1 - Automatic winder and method for pulling out a yarn end from a winding package - Google Patents
Automatic winder and method for pulling out a yarn end from a winding package Download PDFInfo
- Publication number
- EP1857394A1 EP1857394A1 EP07107811A EP07107811A EP1857394A1 EP 1857394 A1 EP1857394 A1 EP 1857394A1 EP 07107811 A EP07107811 A EP 07107811A EP 07107811 A EP07107811 A EP 07107811A EP 1857394 A1 EP1857394 A1 EP 1857394A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- yarn
- winding package
- winding
- package
- intake port
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004804 winding Methods 0.000 title claims abstract description 146
- 238000000034 method Methods 0.000 title claims description 24
- 230000002950 deficient Effects 0.000 abstract description 6
- 238000007796 conventional method Methods 0.000 description 6
- 238000001514 detection method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H67/00—Replacing or removing cores, receptacles, or completed packages at paying-out, winding, or depositing stations
- B65H67/08—Automatic end-finding and material-interconnecting arrangements
- B65H67/081—Automatic end-finding and material-interconnecting arrangements acting after interruption of the winding process, e.g. yarn breakage, yarn cut or package replacement
- B65H67/085—Automatic end-finding and material-interconnecting arrangements acting after interruption of the winding process, e.g. yarn breakage, yarn cut or package replacement end-finding at the take-up package, e.g. by suction and reverse package rotation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2701/00—Handled material; Storage means
- B65H2701/30—Handled filamentary material
- B65H2701/31—Textiles threads or artificial strands of filaments
Definitions
- the present invention relates to an automatic winder in which a cut yarn is suctioned and caught to be guided into yarn splicing means, and particularly to a method for pulling out a yarn end from a winding package.
- Automatic winders unwind a number of spun yarns from yarn supply bobbins produced by a ring spinner or the like, and splice the unwound yarns before rewinding a predetermined amount of yarn around packages.
- the automatic winders include yarn splicing means for suctioning and catching yarns having been cut when being rewound from the yarn supply bobbins onto the winding packages, and guiding the yarns for splicing.
- the winding package is typically rotated in a direction opposite to a winding direction to draw (pull) out an end of the yarn from the winding package.
- Japanese Laid-Open Patent Publication No. 7-82622 has proposed a pullout method for winding package.
- this method when a yarn from a winding package is suctioned and caught, the winding package is temporarily rotated in a direction opposite to a winding direction, as in the aforementioned usual conventional method (see, for example, claim 1 of Japanese Laid-Open Patent Publication No. 7-82622 ).
- multi-pullout occurs because of a slack portion of the yarn being suctioned and caught, making it difficult to prevent a defective yarn from occurring.
- a problem sought to be solved by the present invention is to provide an automatic winder and a method for pulling out a yarn end from a winding package used therein that are capable of reliably preventing plural portions of yarn from being pulled out from the winding package, so as not to wind a defective yarn around the winding package.
- the present invention provides a method for pulling out a yarn end from a winding package in an automatic winder in which a yarn having been cut when being rewound from a yarn supply bobbin onto the winding package is suctioned and caught to be guided into yarn splicing means for yarn splicing.
- the method includes a first step for rotating the winding package in a winding direction, with an intake port for suctioning and catching a yarn on the winding package side being positioned close to the winding package.
- the method further includes a second step for rotating the winding package in a direction opposite to the winding direction with the intake port being positioned close to the winding package after performing the first step, and then moving the intake port away from the winding package, to guide the yarn on the winding package side into the yarn splicing means.
- the present invention provides an automatic winder comprising means for performing control such that a yarn having been cut when being rewound from a yarn supply bobbin onto a winding package is suctioned and caught to be guided into yarn splicing means for yarn splicing.
- the control means includes a first function for rotating the winding package in a winding direction, with an intake port for suctioning and catching a yarn on the winding package side being positioned close to the winding package.
- the control means further includes a second function for rotating the winding package in a direction opposite to the winding direction with the intake port being positioned close to the winding package after performing the first step, and then moving the intake port away from the winding package, to guide the yarn on the winding package side into the yarn splicing means.
- the automatic winder includes means for detecting a yarn break, and the first and second steps (functions) are performed when the detecting means detects the yarn break.
- the first and second steps are performed when the detecting means detects the yarn break within a predetermined period of time immediately after a rewinding operation is started.
- the winding package is rotated in the winding direction, with the intake port being positioned close to the winding package.
- the winding package is rotated in the winding direction with a slack portion of the yarn being suctioned and caught, so that the yarn is rewound around the winding package.
- the slack portion of the yarn can be eliminated from the winding package.
- the winding package is rotated in the direction opposite to the winding direction, so that while being suctioned and caught reliably, the yarn on the winding package side can be drawn out and guided into the yarn splicing means in such a manner as not to pull out multiple portions of the yarn.
- FIG. 1 is a front view illustrating the automatic winder according to the present invention.
- FIG. 2 is a side view of the automatic winder shown in FIG. 1.
- FIGS. 3 and 4 are diagrams for explaining the pullout method according to the present invention.
- FIG. 5 is a timing chart illustrating the relationship between the rotational operation of a winding package and the position of an intake port of a suction mouth.
- the automatic winder includes a number of winding units 1 arranged in a line, and control devices 10 for controlling the winding units 1.
- the winding units 1 each include a yarn supply bobbin 8 produced by a ring spinner or the like, and a winding package 2 formed by rewinding a spun yarn Y from the yarn supply bobbin 8.
- the winding package 2 is in contact with a traverse drum 3 under pressure.
- the traverse drum 3 is connected to a motor 30 by which the traverse drum 3 is rotationally driven. Accordingly, the winding package 2 is rotated following the rotational drive of the traverse drum 3.
- the rotational direction of the traverse drum 3 is controlled by the control device 10 connected to the motor 30.
- the traverse drum 3 has formed therein a groove 31 for guiding and traversing the yarn Y from the yarn supply bobbin 8.
- the winding unit 1 rotationally drives the traverse drum 3 to traverse and unwind the yarn Y from the yarn supply bobbin 8, so that the unwound yarn Y is rewound around the winding package 2.
- the yarn Y passes through a yarn guide 20, which stabilizes an unwound balloon, and a tension device 21, which controls winding tension.
- the winding unit 1 further includes a yarn splicing device 6 such as splicer between the yarn supply bobbin 8 and the winding package 2.
- the winding unit 1 further includes a suction mouth 4 for guiding an upper yarn Y' on the winding package 2 side into the yarn splicing device 6, and a suction pipe 5 for guiding a lower yarn Y" on the yarn supply bobbin 8 side into the yarn splicing device 6.
- the suction mouth 4 and the suction pipe 5 are arm-like intake tubes.
- the winding unit 1 further includes a clearer (detection device) 7.
- the clearer 7 detects, when the yarn Y is traveling, that the yarn Y is traveling (whether a yarn break has occurred) and also detects the thickness of the yarn Y.
- the clearer 7 detects a slub (yarn unevenness) based on the detected thickness of the yarn Y, cuts and eliminates the slub by a cutter (not shown) provided therein.
- the suction mouth 4 and the suction pipe 5 each have an intake port 4a, 5a at one end.
- the winding unit 1 further includes an intake pipe 22 extending in the direction along which the units 1 are arranged (FIG. 2).
- the suction mouth 4 and the suction pipe 5 are connected to the intake pipe 22 by which intake airflow is provided at the intake ports 4a and 5a.
- the suction mouth 4 and the suction pipe 5 each have a rotational shaft 4b, 5b at the other end.
- the suction mouth 4 and the suction pipe 5 are connected to motors 40 and 50, respectively, by which the suction mouth 4 and the suction pipe 5 are rotationally driven about their respective rotational shafts 4b and 5b.
- the rotational drives and directions of the suction mouth 4 and the suction pipe 5 are controlled by the control device 10 connected to the motors 40 and 50.
- the clearer 7 provides a detection signal to the control device 10 upon detection of a yarn break or slub in the traveling yarn Y.
- the clearer 7 cuts the traveling yarn Y by the cutter, whereas when a yarn break has been detected, the cutter of the clearer 7 is not activated.
- the yarn Y is cut into an upper yarn Y' on the winding package side and a lower yarn Y" on the yarn supply bobbin side.
- the control device 10 controls a rotational operation of the winding package 2 for yarn splicing, in a usual conventional method as described below. Reference should be made to FIG. 5 for the rotational operation of the winding package and the position of the suction mouth intake port in the usual conventional method.
- the control device 10 stops the rotation of the motor 30. As a result, the traverse drum 3 and the winding package 2 stop rotating. By inertial rotation of the winding package 2, the upper yarn Y' is wound around the winding package 2.
- the drive of the motor 40 causes the suction mouth 4 to pivot upwardly about the rotational shaft 4b.
- the intake port 4a of the suction mouth 4 moves from its original position (bottom position) to the vicinity of the winding package 2 (top position) as shown in FIG. 2. At this time, the suction pipe 5 does not move, and therefore the intake port 5a remains at its bottom position.
- Each of the intake ports 4a and 5b generates intake airflow by virtue of the intake pipe 22.
- the winding package 2 With the intake port 4a of the suction mouth 4 being located in the vicinity of the winding package 2 (top position), the winding package 2 is rotated by the rotational drive of the motor 30 in a direction opposite to rotation in a winding direction (hereinafter, the rotation in the winding direction is referred to as the "positive rotation”, and the rotation in the opposite direction is referred to as the "negative rotation”).
- the upper yarn Y ' is unwound from the winding package 2, so that the intake port 4a suctions and catches the upper yarn Y'.
- the suction port 4a With the suction port 4a catching the upper yarn Y', the winding package 2 continues the negative rotation, and the suction mouth 4 is caused to pivot downwardly to return to its original position.
- the intake port 4a moves from the top position to the bottom position, guiding the upper yarn Y' downwards. Thereafter, the motor 30 stops operating, so that the rotation of the winding package 2 is stopped, and the unwinding of the upper yarn Y' is stopped.
- the intake port 5a of the suction pipe 5 located at its bottom position suctions and catches the lower yarn Y''. With the intake port 5a catching the lower yarn Y", the suction pipe 5 is caused to pivot upwardly about the rotational shaft 5b. As a result, the suction port 5a moves from the bottom position to the top position, guiding the lower yarn Y" upwards.
- the suction mouth 4 and the suction pipe 5 are operated in the above described manner to respectively guide the upper yarn Y' and the lower yarn Y" into the yarn splicing device 6.
- the yarn splicing device 6 then splices the upper yarn Y' and the lower yarn Y" together to form a single yarn Y.
- any slub in the yarn Y is cut, and the cut slub is suctioned and removed by the suction mouth 4 or the suction pipe 5.
- the motor 50 drives the suction pipe 5 to pivot downwardly to return to its original position, while the winding package 2 is caused to perform the positive rotation to restart an operation of rewinding the yarn Y from the yarn supply bobbin 8 onto the winding package 2.
- a yarn break might occur again within a predetermined period of time (e.g., 1.5 to 2.0 seconds) immediately after the restart of the rewinding operation.
- the yarn break can easily occur on such occasions as when the traveling yarn Y is trapped by a damaged portion of a core 80 of the yarn supply bobbin 8, or when a significant variation occurs in the tension of the yarn Y due to sloughing (i.e., slipping-off).
- the winding package 2 is rotated at a relatively low speed because that period follows immediately after the start-up operation.
- the upper yarn Y' might be loosely wound around the winding package 2, with little tension being applied thereto, failing to be wound tightly- As a result, the upper yarn Y' might be wound while protruding a slack portion Ya from the winding package 2 ((a) of FIG. 3).
- the slack portion Ya of the yarn Y is drawn out from the winding package 2 (i.e., multi-pullout) as shown in (a) of FIG. 3.
- the control device 10 controls the rotational operation of the winding package 2 for yarn splicing, in accordance with a method of the present invention as described below.
- FIG. 5 is referenced for the rotational operation of the winding package and the position of the suction mouth intake port in the method of the present invention.
- the intake port 4a of the suction mouth 4 moves to the vicinity of the winding package 2 (the top position) as shown in (b) of FIG. 3.
- the winding package 2 is not rotating.
- the suction mouth 4 suctions and catches the slack portion Ya of the upper yarn Y' with the intake port 4a as shown in (b) of FIG. 3.
- the traverse drum 3 is rotated with the drive of the motor 30 to cause positive rotation of the winding package 2 (in a rotational direction 2a indicated by an arrow).
- the winding package 2 performs the positive rotation, with the slack portion Ya of the upper yarn Y' being suctioned and caught by the suction mouth 4 and therefore the position thereof being fixed.
- the upper yarn Y' is wound around the winding package 2, with the slack portion Ya being eliminated as shown in (d) of FIG. 3.
- the upper yarn Y' is tightly rewound while being held between the winding package 2 and the traverse drum 3 as shown in FIG. 4(e).
- the winding package 2 After the winding package 2 is rotated in the positive direction a predetermined number of times (or for a predetermined period of time) as shown in (c) and (d) of FIG. 3 and (e) of FIG. 4, the winding package 2 is rotated in the negative direction (rotational direction 2b indicated by an arrow) as shown in (f) of FIG. 4.
- the end Yb of the upper yarn Y' is unwound, and caught by the intake port 4a of the suction mouth 4.
- the suction mouth 4 is caused to pivot downwardly, so that the intake port 4a moves to the bottom position as shown in (g) of FIG. 4, unwinding the upper yarn Y' from the winding package 2 followed by guidance of the upper yarn Y' into the yarn splicing device 6.
- the winding package 2 is temporarily rotated in the positive direction to tightly rewind the upper yarn Y' and eliminate the slack portion Ya, thereby making it possible to prevent multi-pullout and therefore prevent occurrence of a defective yarn.
- the rotational operation in the method of the present invention may be performed upon each detection of a yarn break by the clearer 7 (in this case, the clearer 7 is not necessarily required to detect a slub), or the rotational operation may also be performed upon detection of a slub by the clearer 7 (as well as upon detection of a yarn break). It should be understood that if the winding package 2 is rotated in the method of the present invention when no slack portion Ya is present, the upper yarn Y' can be guided into the yarn splicing device 6 without problems.
- the winding unit 1 may include a sensor (not shown) for detecting the amount of yarn wound around the winding package 2, and the sensor may be connected to the control device 10 to detect the diameter of the winding package 2 based on the amount of wound yarn, making it possible to perform the rotational operation of the winding package 2 in accordance with the method of the present invention only when the winding package 2 is small in diameter.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Replacing, Conveying, And Pick-Finding For Filamentary Materials (AREA)
- Spinning Or Twisting Of Yarns (AREA)
Abstract
Description
- The present invention relates to an automatic winder in which a cut yarn is suctioned and caught to be guided into yarn splicing means, and particularly to a method for pulling out a yarn end from a winding package.
- Automatic winders unwind a number of spun yarns from yarn supply bobbins produced by a ring spinner or the like, and splice the unwound yarns before rewinding a predetermined amount of yarn around packages. In addition, the automatic winders include yarn splicing means for suctioning and catching yarns having been cut when being rewound from the yarn supply bobbins onto the winding packages, and guiding the yarns for splicing.
When suctioning and catching a yarn on the winding package side for guidance, the winding package is typically rotated in a direction opposite to a winding direction to draw (pull) out an end of the yarn from the winding package. - Incidentally, when the yarn on the winding package side is suctioned and caught, there is a possibility that a slack portion of the yarn, rather than the yarn end, might be suctioned and caught, so that plural portions of the yarn are drawn out from the winding package. This state is referred to as the "multi-pullout" (in particular, the state where two yarn portions are drawn out is referred to as the "double-pullout"). If yarn splicing is performed when the multi-pullout state has occurred, the plural portions of yarns are spliced, so that a defective yarn (a waste yarn) is wound around the winding package.
- In order to prevent such a defect, for example,
Japanese Laid-Open Patent Publication No. 7-82622 claim 1 ofJapanese Laid-Open Patent Publication No. 7-82622 - Therefore, a problem sought to be solved by the present invention is to provide an automatic winder and a method for pulling out a yarn end from a winding package used therein that are capable of reliably preventing plural portions of yarn from being pulled out from the winding package, so as not to wind a defective yarn around the winding package.
- As a means for solving the above problem, the present invention provides a method for pulling out a yarn end from a winding package in an automatic winder in which a yarn having been cut when being rewound from a yarn supply bobbin onto the winding package is suctioned and caught to be guided into yarn splicing means for yarn splicing. The method includes a first step for rotating the winding package in a winding direction, with an intake port for suctioning and catching a yarn on the winding package side being positioned close to the winding package. The method further includes a second step for rotating the winding package in a direction opposite to the winding direction with the intake port being positioned close to the winding package after performing the first step, and then moving the intake port away from the winding package, to guide the yarn on the winding package side into the yarn splicing means.
- Also, the present invention provides an automatic winder comprising means for performing control such that a yarn having been cut when being rewound from a yarn supply bobbin onto a winding package is suctioned and caught to be guided into yarn splicing means for yarn splicing. The control means includes a first function for rotating the winding package in a winding direction, with an intake port for suctioning and catching a yarn on the winding package side being positioned close to the winding package. The control means further includes a second function for rotating the winding package in a direction opposite to the winding direction with the intake port being positioned close to the winding package after performing the first step, and then moving the intake port away from the winding package, to guide the yarn on the winding package side into the yarn splicing means.
- Preferably, the automatic winder includes means for detecting a yarn break, and the first and second steps (functions) are performed when the detecting means detects the yarn break.
- More preferably, the first and second steps (functions) are performed when the detecting means detects the yarn break within a predetermined period of time immediately after a rewinding operation is started.
- In the automatic winder according to the present invention and the method for pulling out a yarn end from a winding package in the automatic, winder, as described above, the winding package is rotated in the winding direction, with the intake port being positioned close to the winding package. When multi-pullout has occurred, the winding package is rotated in the winding direction with a slack portion of the yarn being suctioned and caught, so that the yarn is rewound around the winding package. As a result, the slack portion of the yarn can be eliminated from the winding package. Thereafter, the winding package is rotated in the direction opposite to the winding direction, so that while being suctioned and caught reliably, the yarn on the winding package side can be drawn out and guided into the yarn splicing means in such a manner as not to pull out multiple portions of the yarn.
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- FIG. 1 is a front view illustrating an automatic winder according to the present invention.
- FIG. 2 is a side view of the automatic winder shown in FIG. 1.
- FIG. 3 is a diagram for explaining a pullout method according to the present invention.
- FIG. 4 is a diagram continued from FIG. 3 for explaining the pullout method according to the present invention.
- FIG. 5 is a timing chart illustrating the relationship between the rotational operation of a winding package and the position of a suction mouth intake port.
- Hereinafter, an automatic winder according to the present invention and a method for pulling out a yarn end from a winding package used therein will be described in detail with reference to the drawings.
- FIG. 1 is a front view illustrating the automatic winder according to the present invention. FIG. 2 is a side view of the automatic winder shown in FIG. 1.
FIGS. 3 and 4 are diagrams for explaining the pullout method according to the present invention. FIG. 5 is a timing chart illustrating the relationship between the rotational operation of a winding package and the position of an intake port of a suction mouth. - The automatic winder includes a number of
winding units 1 arranged in a line, andcontrol devices 10 for controlling thewinding units 1. Thewinding units 1 each include ayarn supply bobbin 8 produced by a ring spinner or the like, and awinding package 2 formed by rewinding a spun yarn Y from theyarn supply bobbin 8. Thewinding package 2 is in contact with atraverse drum 3 under pressure. Thetraverse drum 3 is connected to amotor 30 by which thetraverse drum 3 is rotationally driven. Accordingly, thewinding package 2 is rotated following the rotational drive of thetraverse drum 3. - The rotational direction of the
traverse drum 3 is controlled by thecontrol device 10 connected to themotor 30. Thetraverse drum 3 has formed therein agroove 31 for guiding and traversing the yarn Y from theyarn supply bobbin 8. Thewinding unit 1 rotationally drives thetraverse drum 3 to traverse and unwind the yarn Y from theyarn supply bobbin 8, so that the unwound yarn Y is rewound around thewinding package 2. At this time, the yarn Y passes through ayarn guide 20, which stabilizes an unwound balloon, and atension device 21, which controls winding tension. - The
winding unit 1 further includes ayarn splicing device 6 such as splicer between theyarn supply bobbin 8 and thewinding package 2. Thewinding unit 1 further includes asuction mouth 4 for guiding an upper yarn Y' on thewinding package 2 side into theyarn splicing device 6, and asuction pipe 5 for guiding a lower yarn Y" on theyarn supply bobbin 8 side into theyarn splicing device 6. Thesuction mouth 4 and thesuction pipe 5 are arm-like intake tubes. Thewinding unit 1 further includes a clearer (detection device) 7.
The clearer 7 detects, when the yarn Y is traveling, that the yarn Y is traveling (whether a yarn break has occurred) and also detects the thickness of the yarn Y. The clearer 7 detects a slub (yarn unevenness) based on the detected thickness of the yarn Y, cuts and eliminates the slub by a cutter (not shown) provided therein. - The
suction mouth 4 and thesuction pipe 5 each have anintake port winding unit 1 further includes anintake pipe 22 extending in the direction along which theunits 1 are arranged (FIG. 2). Thesuction mouth 4 and thesuction pipe 5 are connected to theintake pipe 22 by which intake airflow is provided at theintake ports suction mouth 4 and thesuction pipe 5 each have arotational shaft suction mouth 4 and thesuction pipe 5 are connected tomotors suction mouth 4 and thesuction pipe 5 are rotationally driven about their respectiverotational shafts suction mouth 4 and thesuction pipe 5 are controlled by thecontrol device 10 connected to themotors - The clearer 7 provides a detection signal to the
control device 10 upon detection of a yarn break or slub in the traveling yarn Y. When a slub has been detected, the clearer 7 cuts the traveling yarn Y by the cutter, whereas when a yarn break has been detected, the cutter of the clearer 7 is not activated. As a result, the yarn Y is cut into an upper yarn Y' on the winding package side and a lower yarn Y" on the yarn supply bobbin side. Thereafter, thecontrol device 10 controls a rotational operation of thewinding package 2 for yarn splicing, in a usual conventional method as described below. Reference should be made to FIG. 5 for the rotational operation of the winding package and the position of the suction mouth intake port in the usual conventional method. - The
control device 10 stops the rotation of themotor 30. As a result, thetraverse drum 3 and the windingpackage 2 stop rotating. By inertial rotation of the windingpackage 2, the upper yarn Y' is wound around the windingpackage 2. The drive of themotor 40 causes thesuction mouth 4 to pivot upwardly about therotational shaft 4b. Theintake port 4a of thesuction mouth 4 moves from its original position (bottom position) to the vicinity of the winding package 2 (top position) as shown in FIG. 2. At this time, thesuction pipe 5 does not move, and therefore theintake port 5a remains at its bottom position. Each of theintake ports intake pipe 22. - With the
intake port 4a of thesuction mouth 4 being located in the vicinity of the winding package 2 (top position), the windingpackage 2 is rotated by the rotational drive of themotor 30 in a direction opposite to rotation in a winding direction (hereinafter, the rotation in the winding direction is referred to as the "positive rotation", and the rotation in the opposite direction is referred to as the "negative rotation"). As a result, the upper yarn Y ' is unwound from the windingpackage 2, so that theintake port 4a suctions and catches the upper yarn Y'. With thesuction port 4a catching the upper yarn Y', the windingpackage 2 continues the negative rotation, and thesuction mouth 4 is caused to pivot downwardly to return to its original position. As a result, theintake port 4a moves from the top position to the bottom position, guiding the upper yarn Y' downwards. Thereafter, themotor 30 stops operating, so that the rotation of the windingpackage 2 is stopped, and the unwinding of the upper yarn Y' is stopped. - At the same time, the
intake port 5a of thesuction pipe 5 located at its bottom position suctions and catches the lower yarn Y''. With theintake port 5a catching the lower yarn Y", thesuction pipe 5 is caused to pivot upwardly about therotational shaft 5b. As a result, thesuction port 5a moves from the bottom position to the top position, guiding the lower yarn Y" upwards. - The
suction mouth 4 and thesuction pipe 5 are operated in the above described manner to respectively guide the upper yarn Y' and the lower yarn Y" into theyarn splicing device 6. Theyarn splicing device 6 then splices the upper yarn Y' and the lower yarn Y" together to form a single yarn Y. At this time, any slub in the yarn Y is cut, and the cut slub is suctioned and removed by thesuction mouth 4 or thesuction pipe 5. After the yarn splicing is completed, themotor 50 drives thesuction pipe 5 to pivot downwardly to return to its original position, while the windingpackage 2 is caused to perform the positive rotation to restart an operation of rewinding the yarn Y from theyarn supply bobbin 8 onto the windingpackage 2. - In some cases, a yarn break might occur again within a predetermined period of time (e.g., 1.5 to 2.0 seconds) immediately after the restart of the rewinding operation. The yarn break can easily occur on such occasions as when the traveling yarn Y is trapped by a damaged portion of a
core 80 of theyarn supply bobbin 8, or when a significant variation occurs in the tension of the yarn Y due to sloughing (i.e., slipping-off). In a period immediately after the restart of the rewinding operation, the windingpackage 2 is rotated at a relatively low speed because that period follows immediately after the start-up operation. When the clearer 7 detects a yarn break, the rotation of the windingpackage 2 is stopped by the control means 10 as described above. If the yarn Y breaks while the windingpackage 2 is being rotated at low speed, and the windingpackage 2 stops rotating after slowly rotating by inertia, the upper yarn Y' might be loosely wound around the windingpackage 2, with little tension being applied thereto, failing to be wound tightly- As a result, the upper yarn Y' might be wound while protruding a slack portion Ya from the winding package 2 ((a) of FIG. 3). - In such a case, the slack portion Ya of the yarn Y is drawn out from the winding package 2 (i.e., multi-pullout) as shown in (a) of FIG. 3. In this state, if the winding
package 2 is rotated in the aforementioned usual conventional method, the slack portion Ya of the yarn might be caught by thesuction mouth 4, so that an end Yb of the yarn cannot be caught thereafter, producing a defective yarn in some cases. Therefore, if the yarn breaks within a predetermined period of time (e.g., two seconds) immediately after the start of the rewinding operation, thecontrol device 10 controls the rotational operation of the windingpackage 2 for yarn splicing, in accordance with a method of the present invention as described below. - The following description will be made with reference to FIGS. 3 through 5. In particular, FIG. 5 is referenced for the rotational operation of the winding package and the position of the suction mouth intake port in the method of the present invention. From the state as shown in (a) of FIG. 3, the
intake port 4a of thesuction mouth 4 moves to the vicinity of the winding package 2 (the top position) as shown in (b) of FIG. 3. In (a) and (b) of FIG. 3, the windingpackage 2 is not rotating. In this state, thesuction mouth 4 suctions and catches the slack portion Ya of the upper yarn Y' with theintake port 4a as shown in (b) of FIG. 3. - Then, with the
intake port 4a being located at the top position, as shown in (c) of FIG. 3, thetraverse drum 3 is rotated with the drive of themotor 30 to cause positive rotation of the winding package 2 (in arotational direction 2a indicated by an arrow). As a result, the windingpackage 2 performs the positive rotation, with the slack portion Ya of the upper yarn Y' being suctioned and caught by thesuction mouth 4 and therefore the position thereof being fixed. When the positive rotation of the windingpackage 2 is continued, the upper yarn Y' is wound around the windingpackage 2, with the slack portion Ya being eliminated as shown in (d) of FIG. 3. By further continuing the positive rotation of the windingpackage 2, the upper yarn Y' is tightly rewound while being held between the windingpackage 2 and thetraverse drum 3 as shown in FIG. 4(e). - After the winding
package 2 is rotated in the positive direction a predetermined number of times (or for a predetermined period of time) as shown in (c) and (d) of FIG. 3 and (e) of FIG. 4, the windingpackage 2 is rotated in the negative direction (rotational direction 2b indicated by an arrow) as shown in (f) of FIG. 4. As a result, the end Yb of the upper yarn Y' is unwound, and caught by theintake port 4a of thesuction mouth 4. Thereafter, thesuction mouth 4 is caused to pivot downwardly, so that theintake port 4a moves to the bottom position as shown in (g) of FIG. 4, unwinding the upper yarn Y' from the windingpackage 2 followed by guidance of the upper yarn Y' into theyarn splicing device 6. - As shown in FIG. 5, in the rotational operation of the winding package in the method of the present invention, unlike the aforementioned usual conventional method, the winding
package 2 is temporarily rotated in the positive direction to tightly rewind the upper yarn Y' and eliminate the slack portion Ya, thereby making it possible to prevent multi-pullout and therefore prevent occurrence of a defective yarn. - Then, by operating the
suction pipe 5 and theyarn splicing device 6 in the same manner as in the aforementioned usual conventional method, the upper yarn Y' and the lower yarn Y'' are spliced together to form a single yarn Y before the restart of rewinding from theyarn supply bobbin 8 onto the windingpackage 2. - While in the above embodiment the winding
package 2 performs the rotational operation in the method of the present invention when the yarn breaks within a predetermined period of time immediately after the start of the rewinding operation, the rotational operation in the method of the present invention may be performed upon each detection of a yarn break by the clearer 7 (in this case, theclearer 7 is not necessarily required to detect a slub), or the rotational operation may also be performed upon detection of a slub by the clearer 7 (as well as upon detection of a yarn break). It should be understood that if the windingpackage 2 is rotated in the method of the present invention when no slack portion Ya is present, the upper yarn Y' can be guided into theyarn splicing device 6 without problems. - In addition, the multi-pullout state easily occurs when the winding
package 2 is small in diameter because the yarn can be wound with much slack. Accordingly, the windingunit 1 may include a sensor (not shown) for detecting the amount of yarn wound around the windingpackage 2, and the sensor may be connected to thecontrol device 10 to detect the diameter of the windingpackage 2 based on the amount of wound yarn, making it possible to perform the rotational operation of the windingpackage 2 in accordance with the method of the present invention only when the windingpackage 2 is small in diameter.
Claims (6)
- A method for pulling out a yarn end (Yb) from a winding package (2) in an automatic winder in which a yarn (Y) having been cut when being rewound from a yarn supply bobbin (8) onto the winding package (2) is suctioned and caught to be guided into yarn splicing means (6) for yarn splicing, the method being characterized by comprising:a first step for rotating the winding package (2) in a winding direction (2a), with an intake port (4a) for suctioning and catching a yarn (Y') on the winding package (2) side being positioned close to the winding package (2) ; anda second step for rotating the winding package (2) in a direction (2b) opposite to the winding direction with the intake port (4a) being positioned close to the winding package (2) after performing the first step, and then moving the intake port (4a) away from the winding package (2), to guide the yarn (Y') on the winding package (2) side into the yarn splicing means (6).
- The method according to claim 1, characterized in that the automatic winder includes means (7) for detecting a yarn break, and the first and second steps are performed when the detecting means (7) detects the yarn break.
- The method according to claim 1, characterized in that the automatic winder includes means (7) for detecting a yarn break, and the first and second steps are performed when the detecting means (7) detects the yarn break within a predetermined period of time immediately after a rewinding operation is started.
- An automatic winder comprising means (10) for performing control such that a yarn (Y) having been cut when being rewound from a yarn supply bobbin (8) onto a winding package (2) is suctioned and caught to be guided into yarn splicing means (6) for yarn splicing, the automatic winder being characterized by the control means (10) performing:a first function for rotating the winding package (2) in a winding direction (2a), with an intake port (4a) for suctioning and catching a yarn (Y') on the winding package (2) side being positioned close to the winding package (2); anda second function for rotating the winding package (2) in a direction (2b) opposite to the winding direction with the intake port (4a) being positioned close to the winding package (2) after performing the first function, and then moving the intake port (4a) away from the winding package (2), to guide the yarn (Y') on the winding package (2) side into the yarn splicing means (6) .
- The automatic winder according to claim 4, characterized by comprising means (7) for detecting a yarn break, wherein the first and second functions are performed when the detecting means (7) detects the yarn break.
- The automatic winder according to claim 4, characterized by comprising means (7) for detecting a yarn break, wherein the first and second functions are performed when the detecting means (7) detects the yarn break within a predetermined period of time immediately after a rewinding operation is started.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006134993A JP4277227B2 (en) | 2006-05-15 | 2006-05-15 | Method for extracting winding package in automatic winder and automatic winder |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1857394A1 true EP1857394A1 (en) | 2007-11-21 |
EP1857394B1 EP1857394B1 (en) | 2011-07-27 |
Family
ID=38370802
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20070107811 Active EP1857394B1 (en) | 2006-05-15 | 2007-05-09 | Method for pulling out a yarn end from a winding package |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1857394B1 (en) |
JP (1) | JP4277227B2 (en) |
CN (1) | CN101074074B (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2960196A1 (en) * | 2014-06-27 | 2015-12-30 | Murata Machinery, Ltd. | Yarn winding machine |
EP2567920A3 (en) * | 2011-09-06 | 2016-04-20 | Murata Machinery, Ltd. | Yarn winding machine |
EP3808690A1 (en) * | 2019-10-16 | 2021-04-21 | Murata Machinery, Ltd. | Yarn winding device and yarn catching method |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008057321A1 (en) * | 2008-11-14 | 2010-05-20 | Oerlikon Textile Gmbh & Co. Kg | Workstation of a winder with a suction-loaded gripper tube |
DE102009030802A1 (en) * | 2009-06-27 | 2009-11-05 | Oerlikon Textile Gmbh & Co. Kg | Open end- rotor spinning machine for use in textile industry, has computer device computing optimized base setting of spinning parameters based on mathematical calculation process of spinner and transmitting base setting to workstation |
JP5471924B2 (en) * | 2010-07-15 | 2014-04-16 | 村田機械株式会社 | Yarn winding device |
JP2013067481A (en) * | 2011-09-21 | 2013-04-18 | Murata Machinery Ltd | Winding unit |
JP2013230917A (en) * | 2012-04-27 | 2013-11-14 | Murata Machinery Ltd | Yarn winder |
JP2014108846A (en) * | 2012-11-30 | 2014-06-12 | Murata Mach Ltd | Yarn winding machine and textile machine including the same |
CN111115380B (en) * | 2020-01-03 | 2021-06-01 | 金华枫叶红电器有限公司 | Intelligent winding device for carrying out broken line protection based on clamping |
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FR1442170A (en) * | 1964-08-17 | 1966-06-10 | Device for preventing the formation of loops when sucking the beginning of the thread from a spool | |
US4535945A (en) * | 1982-07-07 | 1985-08-20 | W. Schlafhorst & Co. | Method and device for locating and holding a thread end |
EP0639525A2 (en) * | 1993-08-20 | 1995-02-22 | W. SCHLAFHORST AG & CO. | Method of preparing unwinding bobbins for a rewinding process |
US5605296A (en) * | 1994-09-28 | 1997-02-25 | W. Schlafhorst Ag & Co. | Method and apparatus for winding a yarn |
Family Cites Families (2)
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DE10206288A1 (en) * | 2002-02-15 | 2003-08-28 | Schlafhorst & Co W | Textile machine work-station for cross-wound bobbin, has support roller and bobbin swivel arm lifted during break repair |
JP3697590B2 (en) * | 2003-05-30 | 2005-09-21 | 村田機械株式会社 | Yarn winding machine |
-
2006
- 2006-05-15 JP JP2006134993A patent/JP4277227B2/en not_active Expired - Fee Related
-
2007
- 2007-05-09 EP EP20070107811 patent/EP1857394B1/en active Active
- 2007-05-15 CN CN2007101039013A patent/CN101074074B/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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FR1442170A (en) * | 1964-08-17 | 1966-06-10 | Device for preventing the formation of loops when sucking the beginning of the thread from a spool | |
US4535945A (en) * | 1982-07-07 | 1985-08-20 | W. Schlafhorst & Co. | Method and device for locating and holding a thread end |
EP0639525A2 (en) * | 1993-08-20 | 1995-02-22 | W. SCHLAFHORST AG & CO. | Method of preparing unwinding bobbins for a rewinding process |
US5605296A (en) * | 1994-09-28 | 1997-02-25 | W. Schlafhorst Ag & Co. | Method and apparatus for winding a yarn |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2567920A3 (en) * | 2011-09-06 | 2016-04-20 | Murata Machinery, Ltd. | Yarn winding machine |
EP2960196A1 (en) * | 2014-06-27 | 2015-12-30 | Murata Machinery, Ltd. | Yarn winding machine |
EP3808690A1 (en) * | 2019-10-16 | 2021-04-21 | Murata Machinery, Ltd. | Yarn winding device and yarn catching method |
Also Published As
Publication number | Publication date |
---|---|
EP1857394B1 (en) | 2011-07-27 |
JP2007302457A (en) | 2007-11-22 |
JP4277227B2 (en) | 2009-06-10 |
CN101074074A (en) | 2007-11-21 |
CN101074074B (en) | 2012-08-22 |
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