EP3127844A1 - Garnwicklungsvorrichtung, textilmaschine und paketformungsverfahren - Google Patents

Garnwicklungsvorrichtung, textilmaschine und paketformungsverfahren Download PDF

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Publication number
EP3127844A1
EP3127844A1 EP15774056.4A EP15774056A EP3127844A1 EP 3127844 A1 EP3127844 A1 EP 3127844A1 EP 15774056 A EP15774056 A EP 15774056A EP 3127844 A1 EP3127844 A1 EP 3127844A1
Authority
EP
European Patent Office
Prior art keywords
yarn
package
running
winding
period
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.)
Withdrawn
Application number
EP15774056.4A
Other languages
English (en)
French (fr)
Other versions
EP3127844A4 (de
Inventor
Hisakatsu Imamura
Shotaro Okugawa
Kenji Kawamoto
Atsushi Yamamoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Murata Machinery Ltd
Original Assignee
Murata Machinery Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Murata Machinery Ltd filed Critical Murata Machinery Ltd
Publication of EP3127844A1 publication Critical patent/EP3127844A1/de
Publication of EP3127844A4 publication Critical patent/EP3127844A4/de
Withdrawn legal-status Critical Current

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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 a technique of winding a running yarn to form a package.
  • Patent Literature 1 discloses a yarn winding apparatus, specifically, a winding unit of an automatic winder configured to rewind a yarn pulled out from a yarn supplying bobbin to form a package.
  • the winding unit includes a yarn joining device configured to join a yarn end portion on a winding package side with a yarn end portion on a yarn supplying bobbin side when the state of absence of the running yarn is established due to yarn breakage, yarn cut, or the like.
  • the winding unit includes: a suction mouth configured to suck and catch the yarn end portion on the winding package side and to guide the yarn end portion to the yarn joining device; and a suction pipe configured to suck and catch the yarn end portion on the yarn supplying bobbin side and to guide the yarn end portion to the yarn joining device.
  • the rotation of the package is stopped.
  • the yarn end portion on the package side is wound on the package due to inertial rotation of the package.
  • the package is rotated in the direction opposite to a winding direction, which is the rotation direction of the package for winding the yarn, with the suction mouth located close to the surface of the package. With this, the yarn end portion is pulled out from the package, to be sucked and caught by the suction mouth.
  • Patent Literature 1 also refers to the case where the yarn breakage or the like occurs while the rotation of the package is accelerated. Because the rotation speed of the package is still low during the acceleration of the package, the yarn is more likely to be loosely wound on the package to form a slack portion of the yarn if the package is stopped when the yarn breakage or the like occurs. If the slack portion is formed, the suction mouth may unintentionally suck the slack portion, which is an intermediate portion of the yarn, instead of the end portion of the yarn.
  • Patent Literature 1 takes the following measures: when the yarn breakage or the like occurs during the acceleration of the package, the rotation of the package is stopped once, and after the suction mouth is brought close to the package, the package is rotated again in the winding direction for a predetermined period of time (e.g., within 2 seconds). With this, the package is rotated in the winding direction while the slack portion of the yarn is sucked by the suction mouth. As a result, the slack portion of the yarn is properly rewound, and thus, the slack portion is removed.
  • a predetermined period of time e.g., within 2 seconds
  • Patent Literature 1 Japanese Unexamined Patent Publication No. 2007-302457
  • Patent Literature 1 when the yarn breakage or the like occurs during the formation of the package, the rotation of the package is stopped once, and then the package is rotated in the winding direction to rewind the yarn. Thereafter, the package is rotated in the opposite direction to pull out the yarn end portion.
  • extra time is needed for the process of stopping the package once and the process of resuming the rotation in the winding direction. As a result, the time required for catching the yarn end portion becomes longer correspondingly.
  • the suction mouth brought close to the package successfully sucks and holds the slack portion of the yarn after the package is stopped once, the slack portion of the yarn is removed by rotating the package thereafter in the winding direction.
  • the suction mouth does not always suck the slack portion of the yarn. If the suction mouth fails to suck the slack portion of the yarn, the slack portion is not held, and therefore it is difficult to remove the slack portion of the yarn by rotating the package thereafter in the winding direction.
  • An object of the present invention is to reliably prevent a yarn from being loosely wound on a package, while reducing the possibility that the operation of catching a yarn end portion takes a long time.
  • a yarn winding apparatus includes: a winding portion configured to wind a running yarn to form a package; a yarn running signal output unit configured to output a signal related to running of the yarn; and a controller configured to control the winding portion, wherein: winding of the package is stopped when output of a signal indicating presence of the running yarn from the yarn running signal output unit is stopped during formation of the package, or when a signal indicating absence of the running yarn is output from the yarn running signal output unit during the formation of the package; and when the output of the signal indicating the presence of the running yarn is stopped or when the signal indicating the absence of the running yarn is output, the controller is capable of performing acceleration continuation control of controlling the winding portion to keep rotating the package for a predetermined continuous rotation period while increasing the rotation speed of the package, and then stopping the winding of the package.
  • acceleration continuation control when the output of the signal indicating the presence of the running yarn from the yarn running signal output unit is stopped or when the signal indicating the absence of the running yarn is output from the yarn running signal output unit, due to an occurrence of yarn breakage or the like, the package is not stopped but is kept rotating while the rotation speed of the package is increased, and then winding of the package is stopped.
  • acceleration continuation control when the state of the absence of the running yarn is established, the rotation of the package is kept, and the rotation speed of the package is increased. As a result, the yarn is tightly wound on the package, and this prevents the yarn from being loosely wound on the package. Further, because the speed of the rotation is increased without stopping the rotation of the package, the period of time required for catching a yarn end portion is shorter than in the case where the rotation of the package is stopped once and then resumed.
  • the state of the absence of the running yarn in the present invention can be established not only when yarn breakage occurs, but also when the yarn is compulsorily cut upon detection of a defect in the yarn, and when the yarn of a yarn supplying portion to be supplied to the winding portion is exhausted.
  • the phenomena and operations which cause the state of the absence of the running yarn such as the yarn breakage, yarn cut, and exhaustion of the yarn in the yarn supplying portion, are collectively referred to as "yarn breakage or the like".
  • the yarn winding apparatus of the first aspect is arranged such that when the output of the signal indicating the presence of the running yarn from the yarn running signal output unit is stopped during an acceleration period in which the rotation speed of the package increases, or when the signal indicating the absence of the running yarn is output from the yarn running signal output unit during the acceleration period, the controller performs the acceleration continuation control.
  • the rotation speed of the package In the acceleration period before the rotation speed of the package reaches a predetermined speed, the rotation speed of the package is low, and therefore it is more likely that the yarn is slack if yarn breakage or the like occurs during the acceleration period.
  • the rotation speed of the package is increased when the state of the absence of the running yarn is established during the above acceleration period. This effectively prevents the yarn from being loosely wound on the package.
  • the acceleration period passes, i.e., after the rotation speed of the package reaches the predetermined speed, the speed of the package is not increased even though the yarn breakage or the like occurs. This prevents the operation of catching the yarn end portion from taking unnecessarily long time.
  • the yarn winding apparatus of the second aspect is arranged such that when the output of the signal indicating the presence of the running yarn from the yarn running signal output unit is stopped during a low-speed period in the acceleration period, or when the signal indicating the absence of the running yarn is output from the yarn running signal output unit during the low-speed period in the acceleration period, the controller performs the acceleration continuation control.
  • the rotation speed of the package has not been sufficiently increased yet, and therefore it is more likely that the yarn is slack if yarn breakage or the like occurs during the low-speed period.
  • the rotation speed of the package is increased when the state of the absence of the running yarn is established during the low-speed period, which is the initial stage of the acceleration and has the highest probability of forming the slack in the yarn. This effectively prevents the yarn from being loosely wound on the package.
  • the speed of the package is not increased even if the state of the absence of the running yarn is established. This prevents the operation of catching the yarn end portion from taking unnecessarily long time.
  • the yarn winding apparatus of the second or third aspect further includes a tension applying unit configured to apply tension to the running yarn, and the apparatus is arranged such that the controller controls the tension applying unit so that the tension applied to the yarn during the acceleration period is lower than the tension applied to the yarn after the acceleration period passes.
  • the tension applied to the yarn during the acceleration period is lower than the tension applied to the yarn after the acceleration period passes, and this makes it less likely that the yarn leaps when the yarn breakage or the like occurs during the acceleration period in which the rotation speed of the package is low. This makes it less likely that the yarn is loosely wound on the package.
  • the yarn winding apparatus of any one of the first to fourth aspects further includes a first setting unit through which the continuous rotation period in the acceleration continuation control is settable.
  • the optimum length of the continuous rotation period is settable through the first setting unit.
  • the yarn winding apparatus of the fifth aspect is arranged such that the continuous rotation period is settable through the first setting unit using at least one of parameters: time, the rotation speed of the package, and yarn running speed.
  • the continuous rotation period is settable using time, the rotation speed of the package, or the yarn running speed.
  • the proper use of at least one of these parameters facilitates optimum setting of the continuous rotation period, in accordance with the yarn type, winding conditions, and/or the like.
  • the yarn winding apparatus of the sixth aspect is arranged such that the time length of the continuous rotation period is set, through the first setting unit, to be not less than 0.5 seconds and less than 10 seconds.
  • the time length of the continuous rotation period is not less than 0.5 seconds, and this enables the yarn to be tightly wound on the package during the continuous rotation period, to prevent the slack of the yarn. Meanwhile, the time length of the continuous rotation period is less than 10 seconds, and therefore the period of time required for the operation of catching the yarn end portion is not unnecessarily long.
  • the yarn winding apparatus of to any one of fifth to seventh aspects is arranged such that the continuous rotation period is settable, through the first setting unit, in accordance with the winding diameter of the package.
  • the continuous rotation period is set to have a proper length, in accordance with the winding diameter of the package.
  • the yarn winding apparatus of the third aspect further includes a second setting unit through which the low-speed period is settable.
  • the optimum length of the low-speed period is settable through the second setting unit.
  • the yarn winding apparatus of the ninth aspect is arranged such that the low-speed period is settable through the second setting unit using at least one of parameters: time, the rotation speed of the package, and yarn running speed.
  • the low-speed period is settable using time, the rotation speed of the package, or the yarn running speed.
  • the proper use of at least one of these parameters facilitates optimum setting of the low-speed period, in accordance with the yarn type, winding conditions, and/or the like.
  • the yarn winding apparatus of any one of the first to tenth aspects further includes a first yarn end catcher configured to suck and catch a yarn end portion on a winding portion side from the package when the output of the signal indicating the presence of the running yarn from the yarn running signal output unit is stopped or when the signal indicating the absence of the running yarn is output from the yarn running signal output unit, and the apparatus is arranged such that the controller controls the first yarn end catcher to start operation of catching the yarn end portion during the continuous rotation period in the acceleration continuation control.
  • the first yarn end catcher starts the operation of catching the yarn end portion while the package is accelerated to wind the yarn in the continuous rotation period, and this shortens the time required for catching the yarn end portion.
  • the package may be accelerated while the yarn end portion is held using the suction force of the first yarn end catcher applied to the yarn end portion. In this arrangement, the yarn is further tightly wound on the package.
  • the yarn winding apparatus of any one of the first to tenth aspects further includes a first yarn end catcher configured to suck and catch a yarn end portion on a winding portion side from the package when the output of the signal indicating the presence of the running yarn from the yarn running signal output unit is stopped or when the signal indicating the absence of the running yarn is output from the yarn running signal output unit, and the apparatus is arranged such that the controller controls the first yarn end catcher to start operation of catching the yarn end portion after the continuous rotation period in the acceleration continuation control elapses.
  • the catching operation by the first yarn end catcher is started after the package is accelerated during the continuous rotation period to tightly wind the yarn on the package, and therefore no slack portion of the yarn is caught by the first yarn end catcher.
  • the yarn winding apparatus includes: a yarn supplying portion configured to supply yarns; a second yarn end catcher configured to catch a yarn end portion on a yarn supplying portion side when the output of the signal indicating the presence of the running yarn from the yarn running signal output unit is stopped or when the signal indicating the absence of the running yarn is output from the yarn running signal output unit; and a yarn joining portion provided between the yarn supplying portion and the winding portion, the yarn joining portion being configured to join the yarn end portion on the winding portion side with the yarn end portion on the yarn supplying portion side, wherein the first yarn end catcher guides the caught yarn end portion on the winding portion side to the yarn joining portion, and the second yarn end catcher guides the caught yarn end portion on the yarn supplying portion side to the yarn joining portion.
  • a textile machine includes: a plurality of yarn winding apparatuses each recited in any one of the fifth to eighth aspects; and a central controller configured to control the plurality of yarn winding apparatuses.
  • the first setting unit through which the continuous rotation period in the acceleration continuation control for each of the yarn winding apparatuses is set, is provided to the central controller.
  • a method for forming a package by winding, in a winding portion, a yarn supplied from a yarn supplying portion includes the step of, when a state of absence of the yarn running from the yarn supplying portion to the winding portion is established during formation of the package, keeping rotation of the package for a predetermined continuous rotation period while increasing the rotation speed of the package, and then stopping winding of the package.
  • the package when the state of the absence of the running yarn from the yarn supplying portion to the winding portion is established, the package is kept rotating without stopping the package, while the rotation speed of the package is increased, and then winding of the package is stopped. As such, the rotation of the package is kept while the rotation speed of the package is increased, and thereby, the yarn is tightly wound onto the package. This prevents yarn from being loosely wound onto the package. Further, because the speed is increased without stopping the rotation of the package, the operation for catching the yarn end portion does not take a long time.
  • the method of the fifteenth aspect is arranged such that when the state of the absence of the running yarn from the yarn supplying portion to the winding portion is established during an acceleration period in which the rotation speed of the package increases, the rotation of the package is kept for the predetermined continuous rotation period while the rotation speed of the package is increased.
  • the method of the fifteenth or sixteenth aspect is arranged such that the continuous rotation period is set using at least one of parameters: time, the rotation speed of the package, and yarn running speed.
  • the proper use of at least one of the three parameters facilitates optimum setting of the continuous rotation period, in accordance with the yarn type, winding conditions, and/or the like.
  • FIG. 1 is a front elevation of the automatic winder of the present embodiment.
  • FIG. 2 is a front elevation of a winding unit of the automatic winder.
  • an automatic winder 1 includes: a large number of winding units 2 (yarn winding apparatuses) arranged in the left-right direction of FIG. 1 ; a doffing device 3 provided to be able to travel along the large number of winding units 2 in an arrangement direction of the winding units 2; and a base controller 4 configured to perform overall control of the automatic winder 1.
  • the left-right direction in FIG. 1 (the arrangement direction of the winding units 2) is defined as a "left-right direction”.
  • the direction toward a viewer of FIG. 1 is defined as "frontward”
  • the direction away from the viewer of FIG. 1 is defined as "backward”.
  • the automatic winder 1 is structured so that: the base controller 4 gives a command to each winding unit 2; and in each winding unit 2, a yarn Y unwound from a yarn supplying bobbin 8 is wound on a take up tube 17 to form a package P.
  • the base controller 4 central controller
  • the base controller 4 is configured to control the operation of each winding unit 2, and to perform other operations such as monitoring of the operation state, and setting and storing of operational parameters.
  • the base controller 4 is provided with an operation setting unit 5 and a display 6. Through the operation setting unit 5, various settings related to the winding units 2 and the doffing device 3 are feasible.
  • FIG. 2 is configured to wind, on the take up tube 17, the yarn Y unwound from the yarn supplying bobbin 8, while traversing the yarn Y, to form the package P of a predetermined shape.
  • FIG. 3 is a left side view of the winding unit 2 shown in FIG. 2 .
  • the winding unit 2 includes: a yarn supplying portion 11 which supports the yarn Y on the yarn supplying bobbin 8 so as to be unwindable; a yarn processor 12 configured to carry out various processes on the yarn Y supplied from the yarn supplying portion 11; and a winding portion 13 configured to wind the yarn Y processed in the yarn processor 12 on the take up tube 17, to form the package P.
  • the yarn supplying portion 11, the yarn processor 12, and the winding portion 13 are arranged in this order from bottom to top.
  • the winding unit 2 includes a unit controller 33 communicably connected to the base controller 4 of the automatic winder 1.
  • the yarn supplying portion 11 includes: a bobbin holder 15 which holds the yarn supplying bobbin 8; and an unwinding assist unit 16 which assists unwinding of the yarn Y from the yarn supplying bobbin 8.
  • the unwinding assist unit 16 includes: a cylinder body 29 with which the yarn supplying bobbin 8 is covered from above; and a cylinder body drive motor 25 for moving the cylinder body 29 upward and downward. The cylinder body 29 is lowered by the cylinder body drive motor 25 as the unwinding of the yarn Y proceeds, and thereby, the unwinding assist unit 16 restrains the balloon of the unwound yarn Y, to stabilize unwinding tension.
  • the winding portion 13 includes: a cradle 14 which holds the take up tube 17 so as to be rotatable; a traversing drum 18; and a drum drive motor 28 configured to rotate the traversing drum 18.
  • a spiral traversing groove 18a is formed on the periphery of the traversing drum 18. With this traversing groove 18a, the yarn Y is traversed.
  • the traversing drum 18 rotates in contact with the package P formed on the take up tube 17 while traversing the yarn Y held in the spiral traversing groove 18a.
  • the winding portion 13 further includes: a drum rotation sensor 34 configured to detect the rotation speed of the traversing drum 18; and a package rotation sensor 35 configured to detect the rotation speed of the package P.
  • the yarn processor 12 provided between the yarn supplying portion 11 and the winding portion 13 includes: a yarn feeler 19; a tension applying device 20; a yarn joining device 21; and a yarn clearer 22.
  • the yarn feeler 19 is provided between the unwinding assist unit 16 and the tension applying device 20, and is configured to detect the presence or absence of the running yarn Y.
  • the tension applying device 20 is configured to apply predetermined tension to the running yarn Y.
  • the device of a so-called gate type is illustrated, by way of example.
  • Fixed gate members 20a and movable gate members 20b are alternately arranged in an up-down direction.
  • tension is applied to the yarn Y running through the fixed gate members 20a and the movable gate members 20b.
  • the yarn joining device 21 (yarn joining portion) is configured to join a lower yarn Y1 on a yarn supplying bobbin 8 side with an upper yarn Y2 on a package P side in the state of the absence of the yarn Y running between the yarn supplying portion 11 and the winding portion 13. This state is established, for example, when the yarn Y is cut by a cutter 22a after the yarn clearer 22 detects a yarn defect (which will be described later), when yarn breakage occurs during winding of the package P, and when the yarn supplying bobbin 8 is replaced with a new one.
  • a lower yarn catch guide member 23 configured to catch the lower yarn Y1 on the yarn supplying bobbin 8 side and to guide the lower yarn Y1 to the yarn joining device 21.
  • an upper yarn catch guide member 24 configured to catch the upper yarn Y2 on the package P side and to guide the upper yarn Y2 to the yarn joining device 21.
  • the lower yarn catch guide member 23 is rotatable about an axis 23a, and is configured to rotate upward and downward when driven by a motor 26.
  • the upper yarn catch guide member 24 is also rotatable about an axis 24a, and is configured to rotate upward and downward when driven by a motor 27. Further, as shown in FIG. 3 , the lower yarn catch guide member 23 and the upper yarn catch guide member 24 are connected to a sucking power source 50.
  • the lower yarn catch guide member 23 has, at its leading end portion, a sucker 30 configured to suck an end portion of the lower yarn Y1 to catch the end portion. While the end portion of the lower yarn Y1 is caught by the sucker 30, the lower yarn catch guide member 23 is driven by the motor 26 to rotate upward, thereby to guide the lower yarn Y1 to the yarn joining device 21.
  • the lower yarn catch guide member 23 and the motor 26 which rotates the lower yarn catch guide member 23 correspond to a "second yarn end catcher" in the present invention.
  • the upper yarn catch guide member 24 has, at its leading end portion, a suction mouth 31 configured to suck an end portion of the upper yarn Y2 to catch the end portion.
  • the upper yarn catch guide member 24 at the position illustrated with solid lines in FIG. 3 is first driven by the motor 27 to rotate upward to a yarn end catch position illustrated with two-dot chain lines in FIG. 3 .
  • the suction mouth 31 is positioned near a contact point between the package P and the traversing drum 18, and the suction mouth 31 sucks the end portion of the upper yarn Y2 attached to the surface of the package P, to catch the end portion.
  • the upper yarn catch guide member 24 After catching the end portion, the upper yarn catch guide member 24 is driven by the motor 27 to rotate downward, thereby to guide the thus caught upper yarn Y2 to the yarn joining device 21.
  • the upper yarn catch guide member 24 and the motor 27 which rotates the upper yarn catch guide member 24 correspond to a "first yarn end catcher" in the present invention.
  • the yarn joining device 21 is configured to join the end portion of the lower yarn Y1 guided by the lower yarn catch guide member 23 with the end portion of the upper yarn Y2 guided by the upper yarn catch guide member 24, into the single yarn Y.
  • an air splicer may be used, which is configured to untwist the end portions of the two yarns and then to intertwine the end portions together, with the use of turbulent air flow. Unnecessary parts formed as a result of joining the end portions of the two yarns, i.e., the parts of the yarns from the joint to the respective leading ends, are cut off by an unillustrated cutter incorporated in the yarn joining device 21.
  • the yarn clearer 22 constantly acquires information on the thickness of the running yarn Y. Based on the information on the yarn thickness, the yarn clearer 22 regards, as a yarn defect, an abnormal part of the yarn Y which has a thickness larger than a predetermined threshold. Thus, the yarn defect is detected. Further, the yarn clearer 22 is provided with the cutter 22a. When the yarn clearer 22 detects a yarn defect, the cutter 22a immediately cuts the yarn Y.
  • the yarn joining device 21 joins the lower yarn Y1 and the upper yarn Y2 together after removing the yarn defect from the upper yarn Y2, which has been guided by the upper yarn catch guide member 24, using an unillustrated cutter incorporated in the yarn joining device 21.
  • the unit controller 33 (controller) shown in FIG. 2 is configured to control the operation of each part of the winding unit 2 such as the winding portion 13 and the yarn joining device 21 as described above, so as to form the package P on the take up tube 17.
  • the unit controller 33 is structured by: a central processing unit (CPU); a read-only memory (ROM) in which a program executed by the CPU and data used for the program are stored; a random access memory (RAM) for temporally storing data at the time of execution of the program; and an input/output interface through which data is input from/output to the outside.
  • CPU central processing unit
  • ROM read-only memory
  • RAM random access memory
  • the unit controller 33 is electrically connected to the drive units in the winding unit 2, such as the cylinder body drive motor 25, the motor 26 for driving the lower yarn catch guide member 23, the motor 27 for driving the upper yarn catch guide member 24, and the drum drive motor 28.
  • the unit controller 33 is further electrically connected to the yarn feeler 19, the tension applying device 20, the yarn joining device 21, the yarn clearer 22, the drum rotation sensor 34, the package rotation sensor 35, and the like.
  • the unit controller 33 controls each part of the winding unit 2 based on information on winding conditions and the like transmitted from the base controller 4, which controls the overall operation of the automatic winder 1, so that the winding unit 2 performs operation of forming the package P.
  • FIG. 5 is an enlarged view of the winding portion at the time of catching the yarn end portion by the suction mouth 31.
  • the absence of the running yarn Y is detected in the following manner. First, when a yarn defect is detected by the yarn clearer 22, the yarn Y is cut by the cutter 22a provided in the yarn clearer 22. Based on a yarn defect detection signal transmitted from the yarn clearer 22, the unit controller 33 determines that the state of the absence of the running yarn Y has been established. Alternatively, the unit controller 33 may determine that the state of the absence of the running yarn Y has been established based on a signal from the yarn feeler 19, because the yarn feeler 19 no longer detects the yarn Y after the yarn Y is cut by the cutter 22a.
  • the state of the absence of the running yarn Y is also established when yarn breakage occurs between the yarn supplying portion 11 and the winding portion 13, or when the yarn supplying bobbin 8 is replaced with a new one in the yarn supplying portion 11.
  • the yarn clearer 22 transmits, to the unit controller 33, a signal indicating the absence of the running yarn.
  • output of a signal indicating the presence of the running yarn is stopped, i.e., the signal which has been output from the yarn clearer 22 is no longer output. That is, in the present embodiment, the yarn clearer 22 corresponds to a yarn running signal output unit configured to output a signal related to running of the yarn Y.
  • the yarn feeler 19 may detect the yarn breakage.
  • the phenomena and operations which cause the state of the absence of the running yarn, such as the yarn breakage, yarn cut, and replacement of the yarn supplying bobbin 8, are collectively referred to as "yarn breakage or the like".
  • a slack portion Yb may be formed, as indicated with a two-dot chain line in FIG. 5 .
  • the slack portion Yb is a portion of the upper yarn Y2 loosely wound on the package P.
  • the yarn breakage or the like occurs under the condition that the rotation speed of the package P is low, it is more likely that the yarn Y is loosely wound around the package P, to form the slack portion Yb.
  • the above condition is created, for example, when the yarn breakage or the like occurs immediately after winding of the package P is resumed subsequently to yarn joining by the yarn joining device 21.
  • the intermediate slack portion Yb is unintentionally sucked and caught by the suction mouth in this state, two yarn parts forming the slack portion Yb are guided to the yarn joining device 21 (this is referred to as "double pullout").
  • the slack portion Yb of the upper yarn Y2 and the yarn end portion of the lower yarn Y1 are joined together by the yarn joining device 21, resulting in a yarn joining anomaly.
  • the unnecessary parts from the joint to the respective ends are cut off by the unillustrated cutter in the yarn joining device 21.
  • the rotation of the package P is kept while the rotation speed of the package P is increased in order to tightly wind the upper yarn Y2 onto the package P.
  • FIG. 6 includes graphs each showing the change in the rotation speed of the package P as a function of time.
  • FIG. 6(a) shows the change in the rotation speed of the package P in a normal winding process.
  • the unit controller 33 controls the drum drive motor 28 of the winding portion 13 to start the rotation of the traversing drum 18, thereby starting the rotation of the package P.
  • the rotation speed of the package P increases at a predetermined acceleration rate during an acceleration period TA which is the period before the rotation speed reaches a predetermined speed VA.
  • the unit controller 33 controls the drum drive motor 28 so as to rotate the traversing drum 18 at a constant speed.
  • VA substantially constant speed
  • FIG. 6(a) shows nothing more than a part of the whole process of forming the package P, and therefore the rotation speed of the package P is regarded as the constant speed VA.
  • FIG. 6(b) to FIG. 6(d) each shows the change in the rotation speed of the package P for the case where the yarn breakage or the like occurs.
  • the filled circle Pc on each of the graphs of FIG. 6(b) to FIG. 6(d) represents the timing at which the yarn breakage or the like occurs.
  • FIG. 6(b) shows the change in the rotation speed of the package P for the case where the yarn breakage or the like occurs during the normal winding period.
  • the unit controller 33 controls the drum drive motor 28 to stop the rotation of the package P (S4).
  • FIG. 6(c) shows the change in the rotation speed of the package P for the case where the yarn breakage or the like occurs during a high-speed period in the acceleration period.
  • the yarn breakage or the like occurs during the acceleration period in which the rotation speed of the package P is increasing, but it occurs at a timing T2 within the high-speed period which is the period after the rotation speed exceeds an intermediate speed VB.
  • the upper yarn Y2 wound on the package P is less likely to be slack even if the rotation of the package P is stopped immediately. For this reason, in the yarn joining process shown in FIG.
  • the unit controller 33 controls the drum drive motor 28 to stop the rotation of the package P (S4).
  • FIG. 6(d) shows the change in the rotation speed of the package P for the case where the yarn breakage or the like occurs during a low-speed period in the acceleration period.
  • the yarn breakage or the like occurs during the acceleration period in which the rotation speed of the package P is increasing, and it occurs at a timing T3 during the low-speed period in the acceleration period.
  • the low-speed period is the period before the rotation speed reaches the intermediate speed VB. Because the yarn breakage or the like occurs before the rotation speed of the package P has sufficiently increased, it is more likely that the upper yarn Y2 is loosely wound on the package P to form the slack portion Yb if the rotation of the package P is immediately stopped at this timing.
  • the unit controller 33 performs the following acceleration continuation control. First, the unit controller 33 controls the drum drive motor 28 to keep the rotation (forward rotation) of the package P in the winding direction (forward rotation) for a predetermined continuous rotation period (period Ta in FIG. 6(d) ), without stopping the package P, while increasing the rotation speed of the package P in the winding direction (S3). Then, the winding of the package P is stopped (S4).
  • the unit controller 33 controls the drum drive motor 28 to keep the rotation (forward rotation) of the package P in the winding direction (forward rotation) for a predetermined continuous rotation period (period Ta in FIG. 6(d) ), without stopping the package P, while increasing the rotation speed of the package P in the winding direction (S3). Then, the winding of the package P is stopped (S4).
  • the unit controller 33 controls the drum drive motor 28 to keep the rotation (forward rotation) of the package P in the winding direction (forward rotation) for a predetermined continuous rotation period (period Ta in FIG. 6(d
  • the acceleration rate of the rotation of the package P (inclination of the line in FIG. 6(d) ) in the continuous rotation period is identical with the acceleration rate of the package P in the period before the detection of the yarn breakage or the like.
  • the unit controller 33 stops the rotation of the package P (S4).
  • the package P is kept rotating with acceleration during the predetermined continuous rotation period immediately after the detection of the yarn breakage or the like. This prevents the upper yarn Y2 from being loosely wound onto the package P because the upper yarn Y2 is tightly wound onto the package P.
  • the low-speed period and the high-speed period in the acceleration period are settable by an operator through the operation setting unit 5 (corresponding to a second setting unit of the present invention) provided to the base controller (see FIG. 1 ).
  • the low-speed period is too long, the package P might be accelerated also in the case where the upper yarn Y2 cannot be slacked under some winding condition or the like. In this case, the time required for catching the yarn end portion Ya is unnecessarily long.
  • the threshold of the rotation speed of the package P varies depending on the yarn type, winding conditions, and the like.
  • the optimum lengths of the low-speed period and the high-speed period in the acceleration period are settable by the operator through the operation setting unit 5, in accordance with the yarn type, winding conditions, and/or the like.
  • the above periods are settable using at least one of the following parameters: time, the winding speed of the package P, and the yarn running speed.
  • a timing TB in FIG. 6 is set.
  • the period from the start of the rotation of the package P to the timing TB in the acceleration period is the low-speed period
  • the period from the timing TB to the timing TA in the acceleration period is the high-speed period.
  • the unit controller 33 incorporates therein a timer to measure the time having elapsed from the start of the rotation of the package P.
  • the unit controller 33 is able to determine the state of the package P at the time of occurrence of the yarn breakage or the like.
  • the winding speed VB of the package P in FIG. 6 is set.
  • the period before the rotation speed of the package P reaches VB in the acceleration period is the low-speed period
  • the period after the rotation speed of the package P reaches VB and before the rotation speed reaches VA in the acceleration period is the high-speed period.
  • the actual rotation speed of the package P is detected by the package rotation sensor 35.
  • the unit controller 33 is able to determine the state of the package P at the time of occurrence of the yarn breakage or the like.
  • FIG. 7 is a graph showing the change in the yarn running speed as a function of time.
  • a yarn running speed VB' in FIG. 7 corresponding to the intermediate speed VB of the package P in FIG. 6 is set. Since the yarn running speed is equal to the peripheral speed of the package P, the yarn running speed is obtainable from the rotation speed of the traversing drum 18 detected by the drum rotation sensor 34.
  • the unit controller 33 is able to determine the state of the package P at the time of occurrence of the yarn breakage or the like.
  • the low-speed period and the high-speed period in the acceleration period may be settable through the operation setting unit 5 using two or more of the three parameters: time, the winding speed of the package P, and the yarn running speed.
  • time time
  • winding speed of the package P winding speed
  • yarn running speed the yarn running speed
  • the continuous rotation period which is the period during which the accelerated rotation in the forward direction is kept after the yarn breakage or the like occurs, is also settable by the operator, as well as the low-speed period and the high-speed period in the acceleration period.
  • the continuous rotation period is settable through the operation setting unit 5 (corresponding to a first setting unit in the present invention) provided to the base controller 4 (see FIG. 1 ), in accordance with the yarn type, winding conditions, and/or the like.
  • the continuous rotation period is also settable using at least one of the parameters: time, the winding speed of the package P, and the yarn running speed.
  • the period Ta in FIG. 6(d) is set.
  • the unit controller 33 keeps rotating the package P for the period Ta while accelerating the package P at the acceleration rate which is the same as that before the detection of the yarn breakage or the like.
  • a speed VC in FIG. 6(d) is set. In this case, the unit controller 33 keeps rotating the package P until the speed reaches the speed VC while accelerating the package P at the acceleration rate which is the same as that before the detection of the yarn breakage or the like.
  • a speed VC' in FIG. 7 is set. In this case, the unit controller 33 keeps rotating the package P until the yarn running speed reaches the speed VC' while accelerating the package P to increase the yarn running speed at the acceleration rate which is the same as that before the detection of the yarn breakage or the like.
  • the target speed at which the continuous rotation period ends may be set by incrementing the speed at the time when the yarn breakage or the like occurs by a predetermined rate. For example, if the increment rate of the speed is set to 10%, the accelerated rotation in the forward direction is kept until the speed reaches the value obtained by incrementing the speed at the time of detection of the yarn breakage or the like by 10%.
  • the continuous rotation period may be settable through the operation setting unit 5 using two or more of the three parameters: time, the winding speed of the package P, and the yarn running speed.
  • time time
  • winding speed of the package P winding speed of the package P
  • yarn running speed yarn running speed
  • the time length of the continuous rotation period is not less than 0.5 seconds, for example. However, if the continuous rotation period is long more than necessary, delay is caused in the following processes. This unnecessarily prolongs the period of time required for the suction mouth 31 to catch the yarn end portion Ya, and eventually, prolongs the period of time required for the overall yarn joining operation. In view of the above, it is preferable that the time length of the continuous rotation period is less than 10 seconds. Further, the length of the continuous rotation period with which the slack of the upper yarn Y2 is prevented differs depending on the yarn type, winding conditions, and the like. Thus, the operator sets the optimum length of the continuous rotation period using at least one of the above three parameters, through the operation setting unit 5, in accordance with the yarn type, winding conditions, and/or the like.
  • the continuous rotation period is settable through the operation setting unit 5, in accordance with the winding diameter of the package P.
  • the operator sets, through the operation setting unit 5, a plurality of lengths of the continuous rotation period respectively corresponding to a plurality of winding diameters of the package P.
  • the unit controller 33 is capable of obtaining the winding diameter of the package P.
  • the unit controller 33 selects the length of the continuous rotation period corresponding to the winding diameter of the package P at this timing.
  • the sucker 30 provided at the leading end portion of the lower yarn catch guide member 23 in FIG. 2 is on standby at a lower position (the position below the tension applying device 20, as shown in FIG. 2 ) during the winding of the package P. Therefore, when the yarn breakage or the like occurs, the lower yarn Y1 is immediately caught by the sucker 30 of the lower yarn catch guide member 23.
  • the unit controller 33 controls the upper yarn catch guide member 24 to start the operation of catching the yarn end portion Ya of the upper yarn Y2 (S5). That is, the unit controller 33 controls the motor 27 to rotate the upper yarn catch guide member 24 upward. Then, as shown in FIG. 3 , the suction mouth 31 at the leading end portion of the upper yarn catch guide member 24 is brought close to the surface of the package P.
  • the unit controller 33 controls the drum drive motor 28 to rotate the package P in an unwinding direction which is opposite to the winding direction (reverse rotation), to pull out the yarn end portion Ya wound on the package P (S6).
  • the thus pulled out yarn end portion Ya is sucked and caught by the suction mouth 31. If the rotation speed of the package P at the time of occurrence of the yarn breakage or the like is low, the accelerated rotation of S3 is performed, and with this, the yarn is tightly wound on the package P to prevent the formation of the slack portion Yb. For this reason, no slack portion Yb is caught by the suction mouth 31.
  • the unit controller 33 starts the catching operation by the suction mouth 31 (the rotation of the upper yarn catch guide member 24).
  • the catching operation by the suction mouth 31 is started after the package P is accelerated for the continuous rotation period to tightly wind the upper yarn Y2 on the package P, and therefore no slack portion Yb of the upper yarn Y2 is caught by the suction mouth 31.
  • the unit controller 33 may start the catching operation by the suction mouth 31 during the continuous rotation period in S3.
  • the period of time required for catching the yarn end portion Ya is shortened.
  • the package P may be rotated in the forward direction while the yarn end portion Ya is held using the suction force of the suction mouth 31 applied to the yarn end portion Ya.
  • the upper yarn Y2 is further tightly wound on the package P.
  • the unit controller 33 controls the motor 27 to rotate the upper yarn catch guide member 24 downward, thereby to guide the yarn end portion of the upper yarn Y2 caught by the suction mouth 31 to the yarn joining device 21. Then, the unit controller 33 controls the motor 26 to rotate the lower yarn catch guide member 23 upward, thereby to guide the yarn end portion of the lower yarn Y1 caught by the sucker 30 to the yarn joining device 21.
  • the unit controller 33 controls the yarn joining device 21 to join the yarn end portion of the lower yarn Y1 guided by the lower yarn catch guide member 23 with the yarn end portion of the upper yarn Y2 guided by the upper yarn catch guide member 24 (S7).
  • the package P when the yarn breakage or the like occurs to establish the state of the absence of the running yarn Y, the package P is kept rotating without being stopped while the rotation speed of the package P is increased.
  • the rotation of the package P is kept, and the rotation speed of the package P is increased.
  • the upper yarn Y2 after the yarn breakage or the like is tightly wound on the package P, to prevent the upper yarn Y2 from being loosely wound on the package P.
  • the speed of the rotation of the package P is increased without stopping the rotation of the package P, the operation of catching the yarn end portion Ya of the upper yarn Y2 does not take long time, and eventually, the overall yarn joining operation does not take long time.
  • lint is generated as a result of cutting of the unnecessary parts of the yarns in the yarn joining device 21.
  • the lint may be involved in the package P. In this regard, the generation of such lint is prevented in the present embodiment.
  • the acceleration rotation of the package P is performed. This effectively prevents the upper yarn Y2 from being loosely wound on the package P.
  • the rotation speed of the package P is higher than a predetermined speed, the package P is not accelerated even if the yarn breakage or the like occurs. This prevents the operation of catching the yarn end portion Ya from taking unnecessarily long time.
  • the low-speed period in the acceleration period based on which it is determined whether the acceleration rotation of the package P is performed, and the continuous rotation period for which the acceleration rotation of the package P is performed are settable through the operation setting unit 5.
  • the above periods are settable using time, the rotation speed of the package P, or the yarn running speed. The proper use of at least one of these parameters facilitates the optimum setting of these periods in accordance with the yarn type, winding conditions and/or the like.
  • the operation setting unit 5 is provided to the base controller 4 of the automatic winder 1. This enables the operator to collectively set the above periods for the plurality of the winding units 2 through the operation setting unit 5.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Replacing, Conveying, And Pick-Finding For Filamentary Materials (AREA)
  • Winding Filamentary Materials (AREA)
EP15774056.4A 2014-04-03 2015-02-25 Garnwicklungsvorrichtung, textilmaschine und paketformungsverfahren Withdrawn EP3127844A4 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2014077108A JP2015196598A (ja) 2014-04-03 2014-04-03 糸巻取装置、繊維機械、及び、パッケージの形成方法
PCT/JP2015/055350 WO2015151656A1 (ja) 2014-04-03 2015-02-25 糸巻取装置、繊維機械、及び、パッケージの形成方法

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EP3127844A1 true EP3127844A1 (de) 2017-02-08
EP3127844A4 EP3127844A4 (de) 2017-11-08

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CN111761840B (zh) * 2019-04-01 2022-02-01 中国航发商用航空发动机有限责任公司 纤维织物卷绕系统及卷绕变形控制方法

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JPS5424026B2 (de) * 1973-10-15 1979-08-17
JPH0729102Y2 (ja) * 1990-03-14 1995-07-05 村田機械株式会社 ワインダーの糸継動作制御装置
JP4120635B2 (ja) * 2004-11-19 2008-07-16 村田機械株式会社 繊維機械
JP5007826B2 (ja) * 2008-03-31 2012-08-22 村田機械株式会社 糸巻取装置及びこの糸巻取装置を備える自動ワインダ
JP5471924B2 (ja) * 2010-07-15 2014-04-16 村田機械株式会社 糸巻取装置
JP2013052997A (ja) * 2011-09-06 2013-03-21 Murata Machinery Ltd 糸巻取機

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WO2015151656A1 (ja) 2015-10-08
CN106029540B (zh) 2019-03-29
JP2015196598A (ja) 2015-11-09
EP3127844A4 (de) 2017-11-08

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