EP2620403A2 - Garnwickelmaschine und Garnwickelverfahren - Google Patents

Garnwickelmaschine und Garnwickelverfahren Download PDF

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Publication number
EP2620403A2
EP2620403A2 EP12195544.7A EP12195544A EP2620403A2 EP 2620403 A2 EP2620403 A2 EP 2620403A2 EP 12195544 A EP12195544 A EP 12195544A EP 2620403 A2 EP2620403 A2 EP 2620403A2
Authority
EP
European Patent Office
Prior art keywords
yarn
package
rotation
guide
traversing
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Withdrawn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
EP12195544.7A
Other languages
English (en)
French (fr)
Inventor
Katsufumi Muta
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 EP2620403A2 publication Critical patent/EP2620403A2/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Withdrawn legal-status Critical Current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
    • B65H57/00—Guides for filamentary materials; Supports therefor
    • B65H57/006—Traversing guides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H54/00—Winding, coiling, or depositing filamentary material
    • B65H54/02—Winding and traversing material on to reels, bobbins, tubes, or like package cores or formers
    • B65H54/28—Traversing devices; Package-shaping arrangements
    • B65H54/2884—Microprocessor-controlled traversing devices in so far the control is not special to one of the traversing devices of groups B65H54/2803 - B65H54/325 or group B65H54/38
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H57/00—Guides for filamentary materials; Supports therefor
    • B65H57/003—Arrangements for threading or unthreading the guide
    • 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 structure that controls driving of a yarn guide in a yarn winding machine that winds a yarn while traversing the yarn with the yarn guide that is driven to reciprocate.
  • the yarn winding machines of this type are disclosed in Japanese Unexamined Patent Publication No. 2009-508782 and Japanese Patent Application Laid-open No. 2007-210776 .
  • the yarn winding machine winds a yarn supplied from a yarn supplying section (a spinning cop in Japanese Unexamined Patent Publication No. 2009-508782 and a supply bobbin in Japanese Patent Application Laid-open No. 2007-210776 ) around a periphery of a winding bobbin (a cross-wound bobbin in Japanese Unexamined Patent Publication No. 2009-508782 ) that is driven to rotate.
  • the winding bobbin with the yarn wound around its periphery is particularly referred to as a "package".
  • the yarn winding machines disclosed in Japanese Unexamined Patent Publication No. 2009-508782 and Japanese Patent Application Laid-open No. 2007-210776 include a traversing device that traverses the yarn that is to be wound into the package.
  • This traversing device has an elongated arm member and a yarn guide arranged at a free end of the arm member. The yarn guide hooks and guides the yarn.
  • the fixed end of the arm member is fixed to an output shaft of a driving motor (driving device). This driving motor drives the arm member to reciprocate in a winding width direction of the package.
  • the traversing device temporarily moves the yarn guide to a non-interrupting position where the yarn guide would not engage with the yarn. That is, in the non-interrupting position, the yarn guide is in a state of the yarn being disengaged therewith. Consequently, if the rotation of the package is to be resumed in a state where the yarn guide is in the non-interrupting position, a task of hooking the yarn onto the yarn guide (i.e., engaging the yarn with the yarn guide) is required so that the yarn guide can guide the yarn.
  • the task of hooking the yarn onto the yarn guide is sometimes referred to as "threading".
  • threading is performed with a tension applied to the yarn by causing relative movements between the yarn guide and the yarn. More specifically, an automatic cross-winding machine in Japanese Unexamined Patent Publication No. 2009-508782 reversely rotates the package (the cross-wound bobbin) to catch the yarn by suction with a suction nozzle. At this point, the yarn guide is moved to perform threading, and then yarn joining (a yarn joining process) is performed by a yarn joining device (splicer). Consequently, the threading can be reliably performed with the technique disclosed in Japanese Unexamined Patent Publication No. 2009-508782 .
  • the automatic cross-winding machine sucks the yarn pulled from the package with the suction nozzle and then applies a tension to the yarn pulled out of the package before performing the threading.
  • "false yarn end finding" tends to occur, where a part of the yarn, which is not the yarn end, on a surface of the package is pulled toward the suction nozzle.
  • the automatic cross-winding machine of Japanese Unexamined Patent Publication No. 2009-508782 has a structure that performs the threading to the yarn guide with a suction force acting onto the surface of the package with the suction nozzle.
  • the yarn guide may be damaged or the like if the yarn that is causing the false yarn end finding (the yarn on the surface of the package that is being pulled toward the suction nozzle) is entangled with the yarn guide.
  • a yarn winding machine includes a first driving section, a yarn guide, and a control section.
  • the first driving section drives and rotates a package into which a yarn is wound.
  • the yarn guide performs reciprocating movements to traverse and guide the yarn when the yarn is to be wound into the package.
  • the control section controls the first driving section and the yarn guide to stop the reciprocating movements of the yarn guide while rotation of the package is stopped, and to start the reciprocating movements of the yarn guide after the rotation of the package that has been in a stopped state in a winding direction is started.
  • a yarn winding method includes driving, traversing, and controlling.
  • driving a package into which a yarn is wound is driven to rotate.
  • traversing the yarn is traversed and guided by causing a yarn guide to perform reciprocating movements when the yarn is to be wound into the package.
  • controlling the yarn guide is controlled to stop the reciprocating movements of the yarn guide while rotation of the package is stopped, and to start the reciprocating movements after the rotation of the package that has been in a stopped state in a winding direction is started.
  • an automatic winder (yarn winding machine) according to a first embodiment, multiple yarn winding units 10 are arranged in a line, each of them having a structure as shown in FIG. 1 .
  • the automatic winder according to the present embodiment includes a main controller (not shown) that centrally controls the yarn winding units 10.
  • Each yarn winding unit 10 unwinds a yarn 12 from a supply bobbin 11 and winds it around a winding bobbin 14.
  • the winding bobbin 14 with the yarn 12 wound thereon is referred to as a package 15.
  • An "upstream side” and a “downstream side” mentioned in the explanation below refer to the upstream and downstream sides with respect to a running direction of the yarn 12.
  • the yarn 12 that is unwound from the supply bobbin 11 at a yarn supplying section 16 is wound by a winding section 17 as shown in FIG. 1 or the like.
  • the upstream side is therefore the side of the yarn supplying section 16, and the downstream side is the side of the winding section 17.
  • Each yarn winding unit 10 includes the yarn supplying section 16, the winding section 17, and a unit controller 18.
  • the unit controller 18 includes, for example, a central processing unit (CPU), a random access memory (RAM), a read-only memory (ROM), an input/output (I/O) port, and a communication port.
  • a computer program for controlling the components of the yarn winding unit 10 is stored in the ROM.
  • the components of the yarn winding unit 10 (described later in detail) and the main controller are connected to the I/O port and the communication port.
  • the unit controller 18 carries out communications such as transmission of control information. The unit controller 18 can thereby control the operations of the components of the yarn winding unit 10.
  • the yarn supplying section 16 holds the supply bobbin 11, from which the yarn 12 is supplied, at a predetermined position.
  • the winding section 17 winds the yarn 12 supplied from the yarn supplying section 16 around the periphery of the winding bobbin 14 while traversing the yarn 12. More specifically, the winding section 17 includes a cradle 19, a contact roller 20, and a traversing device 21.
  • a pair of center bearings 22 and 23 is arranged on the cradle 19.
  • the center bearings 22 and 23 are rotatable with respect to the cradle 19 around its shaft line and are positioned to face each other in a direction of this shaft line.
  • the cradle 19 supports the winding bobbin 14, with the center bearings 22 and 23 grasping the winding bobbin 14 therebetween in the shaft line. With this arrangement, the cradle 19 can support the package 15 rotatably around its shaft line.
  • One of the center bearings 22 and 23 (the center bearing 23 in FIG. 1 ) is coupled to a rotation output shaft of a package driving motor (first driving section) 24 in a manner not to rotate relative to the package driving motor 24.
  • the package 15 can be directly driven to rotate by driving the package driving motor 24 to rotate, with the center bearings 22 and 23 grasping the package 15 therebetween.
  • the yarn winding unit 10 includes a package driving controller 25 that controls operations of the package driving motor 24.
  • the unit controller 18 sends the package driving controller 25 a command value for a rotation frequency of the package driving motor 24 (i.e., the number of rotations per unit time).
  • the unit controller 18 therefore can also be referred to as a rotation command section 54.
  • the package driving controller 25 performs control such that the package driving motor 24 is driven to rotate at a rotation frequency designated by the command value that is received from the rotation command section 54. With this arrangement, the package 15 can be rotated at a desired rotation frequency.
  • a package rotation sensor (rotation detecting section) 26 is arranged on the cradle 19 to detect the rotation of the package 15.
  • This package rotation sensor 26 is, for example, an incremental rotary encoder.
  • the package rotation sensor 26 sends a pulse signal to the unit controller 18 every predetermined angular degrees the center bearing 22 rotates (in other words, every predetermined angular degrees the package 15 rotates).
  • the unit controller 18 detects an amount of rotation made by the package 15.
  • the traversing device 21 is arranged near the cradle 19.
  • This traversing device 21 is an arm-type traversing device. More specifically, as shown in FIG. 2 , the traversing device 21 includes a yarn guide 27, a traverse arm 28, and a traverse driving motor (second driving section) 29.
  • the yarn guide 27 is arranged at a free end of the traverse arm 28.
  • This yarn guide 27 is shaped into a hook. More specifically, the yarn guide 27 is bent on one side, and has a narrow yarn hooking groove 30 in an inner perimeter of the yarn guide 27 to hook and guide the yarn 12.
  • a fixed end of the traverse arm 28 (a side of the traverse arm 28 opposite the yarn guide 27 in a longitudinal direction of the traverse arm 28) is fixed to the driving shaft of the traverse driving motor 29.
  • the traverse driving motor 29 is a servomotor or the like and is arranged to drive and pivot the traverse arm 28.
  • the yarn guide 27 is driven to reciprocate in a traversing width direction (side-to-side direction in FIG. 1 ).
  • the yarn guide 27 can guide the yarn 12 by hooking the yarn 12 (i.e., by engaging itself with the yarn 12).
  • the yarn winding unit 10 includes a traverse controller 31 that controls this traverse driving motor 29.
  • the traverse controller 31 controls the traverse driving motor 29 based on a control signal from the unit controller 18.
  • the contact roller 20 is arranged near the cradle 19.
  • the contact roller 20 is brought into contact with the periphery of the package 15 so that the contact roller 20 can rotate together with the package 15. As shown in FIG. 2 , the contact roller 20 is arranged in contact with the yarn 12 that is wound into the package 15. By winding the yarn 12 into the package 15 while causing the yarn 12 to be in contact with the contact roller 20, the track of the yarn 12 can be stabilized. This prevents the yarn 12 from being overly swung by the yarn guide 27.
  • the yarn 12 can be wound around the surface of the package 15 while being traversed.
  • the traverse driving motor 29 and the package driving motor 24 are provided separately. With such an arrangement, the automatic winder according to the present embodiment can traverse the yarn 12, independent of the rotation of the package 15. This allows for flexible control of traversing start timing and the like.
  • yarn guiding portions 32 and 33 are formed in the yarn guide 27 so as to be inclined toward the yarn hooking groove 30.
  • This arrangement facilitates hooking of the yarn 12 by the yarn guide 27 (i.e., guiding of the yarn 12 into the yarn hooking groove 30).
  • the yarn hooking groove 30 has one side open in the traversing width direction. By moving the yarn guide 27 in the traversing width direction, the yarn 12 can be easily hooked onto the yarn guide 27. Simply by driving the traversing device 21, the threading can be performed onto the yarn guide 27, and thereby the yarn guide 27 becomes ready to guide the yarn 12.
  • a pivoting shaft of the traverse arm 28 (the output shaft of the traverse driving motor 29) is positioned substantially parallel to the yarn path of the yarn 12 that runs near the yarn guide 27.
  • the yarn guide 27 is driven to reciprocate on a plane that is substantially orthogonal to the yarn path, and therefore the yarn guide 27 can smoothly traverse the yarn 12.
  • the cradle 19 swings around a swing shaft 34 so that an increase in a diameter of the package 15 can be absorbed as the winding of the yarn 12 proceeds. Because the cradle 19 is swingable, the periphery of the package 15 can be suitably brought into contact with the contact roller 20, regardless of the diameter of the package 15.
  • a yarn unwinding assisting device 35, a tension applying device 36, a yarn joining device 37, and a yarn monitoring device 38 are arranged in this order from the side of the yarn supplying section 16 between the yarn supplying section 16 and the winding section 17.
  • the yarn unwinding assisting device 35 includes a restricting member 39 that can cap an inner tube of the supply bobbin 11.
  • the restricting member 39 is substantially cylindrical and is arranged in contact with a balloon formed in an upper portion of a yarn layer of the supply bobbin 11.
  • the balloon denotes a portion of the yarn 12 that is unwound from the supply bobbin 11 and centrifugally swung.
  • the tension applying device 36 applies a predetermined tension to the running yarn 12.
  • the tension applying device 36 is a gate-type device in which movable comb teeth and fixed comb teeth are arranged to correspond with one another. The movable comb teeth are urged such that they mesh with the fixed comb. By causing the yarn 12 to meander through the meshed comb teeth, a suitable tension is applied to the yarn 12, and thereby the quality of the package 15 can be improved.
  • the tension applying device 36 is not limited to the gate-type device, but a disk-type device can be employed.
  • the yarn monitoring device 38 monitors the running yarn 12. More specifically, the yarn monitoring device 38 includes a clearer head 40 that has a light transmission sensor (not shown) for detecting thickness of the yarn 12 and an analyzer 41 that processes a yarn thickness signal output by this sensor. With the analyzer 41 monitoring the yarn thickness signal output by the sensor, the yarn monitoring device 38 detects a yarn defect included in the yarn 12 (an abnormal portion in the yarn 12). A cutter 42 is arranged on an upstream side of the clearer head 40. The cutter 42 cuts the yarn 12 as soon as the yarn monitoring device 38 detects a yarn defect.
  • the yarn monitoring device 38 is not limited to the light transmission sensor, and a light reflection sensor or a capacitance sensor, for example, can be used to monitor the yarn 12.
  • the yarn joining device 37 connects (joins) a lower yarn on the supply bobbin 11 side and an upper yarn on the package 15 side.
  • the yarn joining device 37 according to the present embodiment is a splicer that twists yarn ends together by swirling airflow generated by compressed air.
  • the yarn joining device 37 is not limited to an air splicer; however, it can be a mechanical knotter, for example.
  • a lower yarn catching member 45 is arranged below the yarn joining device 37 to catch the yarn end on the supply bobbin 11 side and guide the yarn end to the yarn joining device 37.
  • An upper yarn catching member 46 is arranged above the yarn joining device 37 to catch the yarn end on the package 15 side and guide the yarn end to the yarn joining device 37.
  • the lower yarn catching member 45 includes a lower yarn pipe arm 47 and a lower yarn suction mouth 48 that is formed at a free end of the lower yarn pipe arm 47.
  • the upper yarn catching member 46 includes an upper yarn pipe arm 49 and an upper yarn suction mouth 50 that is formed at a free end of the upper yarn pipe arm 49.
  • the lower yarn pipe arm 47 and the upper yarn pipe arm 49 can pivot around pivot shafts 51 and 52, respectively. Suitable negative pressure sources (not shown) are connected to the lower yarn pipe arm 47 and the upper yarn pipe arm 49. With this arrangement, the lower yarn pipe arm 47 and the upper yarn pipe arm 49 can generate suction airflow through the lower yarn suction mouth 48 and the upper yarn suction mouth 50 respectively, and can suction and catch the ends of the lower and upper yarns respectively.
  • a yarn winding method with which the rotation of the package 15 is stopped and then the rotation of the package 15 is started by the automatic winder according to the present embodiment is explained below.
  • the unit controller 18 monitors a detection result obtained by the yarn monitoring device 38.
  • the unit controller 18 immediately operates the cutter 42 to cut the yarn 12 (Step S102).
  • the downstream yarn 12 with respect to the point where the yarn 12 is cut with the cutter 42 is wound into the package 15. Accordingly, this yarn 12 wound into the package 15 includes a yarn defect detected by the yarn monitoring device 38.
  • the upstream yarn 12 with respect to the point where the yarn 12 is cut with the cutter 42 is sectioned and caught into the lower yarn suction mouth 48.
  • the unit controller 18 stops the rotation of the package 15 at the same time as, or almost in tandem with, the cutting of the yarn 12.
  • the yarn winding unit 10 does not include a braking mechanism.
  • the unit controller 18 brings the rotation of the package 15 to a stop by reducing speed of the package driving motor 24.
  • the unit controller 18 sends a control signal to the traverse controller 31 to move the yarn guide 27 to a non-interrupting position at which the yarn guide 27 would not be engaged with the yarn 12 (beyond the ends of the traverse width) and hold the yarn guide 27 at this non-interrupting position.
  • the yarn guide 27 therefore would not interrupt the yarn joining operation (described later) or the like.
  • the end of the yarn 12 cut with the cutter 42 (the downstream yarn 12 with respect to the cutter 42) is wound into the package 15. This means that, at Step S103, the yarn 12 is not guided by the yarn guide 27 (the yarn 12 is not engaged with the yarn guide 27, or in other words, the yarn 12 comes off the yarn hooking groove 30).
  • the unit controller 18 pivots the upper yarn pipe arm 49 upward (toward the winding section 17) and brings the upper yarn suction mouth 50 close to the surface of the package 15. With this positioning maintained, the unit controller 18 generates the suction airflow through the upper yarn suction mouth 50, and sends the package driving controller 25 the control signal to reversely rotate the package 15 (i.e., to rotate the package 15 in a direction opposite the winding direction, see the positioning in FIG. 5 ). In this manner, the yarn end wound into the package 15 is pulled out, and sectioned and caught into the upper yarn suction mouth 50 (Step S104).
  • the unit controller 18 causes the package 15 to reversely rotate to a predetermined extent so that the yarn defect detected by the yarn monitoring device 38 can be pulled out of the package 15 and suctioned into the upper yarn suction mouth 50. The yarn defect detected by the yarn monitoring device 38 can be thereby removed from the package 15.
  • the unit controller 18 then pivots the upper yarn pipe arm 49 downward, while suctioning and catching the yarn 12 on the package 15 side (the upper yarn) toward the upper yarn suction mouth 50.
  • the upper yarn is thereby guided to the yarn joining device 37.
  • the unit controller 18 pivots the lower yarn pipe arm 47 upward, while suctioning and catching the yarn 12 on the supply bobbin 11 side (the lower yarn) toward the lower yarn suction mouth 48.
  • the lower yarn is thereby guided to the yarn joining device 37 (Step S105).
  • the unit controller 18 sends the package driving controller 25 the control signal to stop the reverse rotation of the package 15 (Step S106).
  • the unit controller 18 Upon guiding the upper and lower yarns to the yarn joining device 37, the unit controller 18 operates the yarn joining device 37 to perform the joining operation on the upper and lower yarns. This brings the yarn 12 between the package 15 and the supply bobbin 11 into a continuous state.
  • the unit controller 18 monitors whether the package 15 is ready to start its rotation (Step S108). When the package 15 is ready to start the rotation, the unit controller 18 executes a start process (Steps S109 to S111). For example, if the rotation of the package 15 has been stopped due to the yarn joining operation as shown in the flowchart of FIG. 4 , the rotation of the package 15 can be resumed when the yarn joining operation is completed by the yarn joining device 37. The unit controller 18 therefore monitors, at Step S108, whether the yarn joining operation is completed by the yarn joining device 37, and executes the start process when completion of the yarn joining operation is detected.
  • the unit controller 18 provides control to start driving the package driving motor 24 to rotate the stationary package 15 in the winding direction (start of a package driving process, Step S109).
  • the rotation command section 54 sends the package driving controller 25 a rotation frequency having a relatively small command value.
  • the rotation command section 54 gradually increases the command value for the rotation frequency that it sends to the package driving controller 25 as time passes, until the package driving motor 24 reaches a targeted rotation frequency.
  • the rotational speed of the package driving motor 24 is gradually increased, and therefore the slipping can be prevented between the center bearing 23 and the winding bobbin 14.
  • the rotational speed of the package 15 can be increased to reach the targeted rotational speed.
  • the unit controller 18 has a timer function for measuring time.
  • the unit controller 18 therefore can also serve as a timer section 53.
  • the unit controller 18 monitors time elapsed after starting the rotation of the package 15 (Step S109), based on the timing result obtained by the timer section 53 (timing process, Step S110).
  • the unit controller 18 sends the traverse controller 31 a control signal to start driving the traversing device 21 (start of a traversing process, Step S111).
  • the yarn 12 is hooked onto the yarn guide 27 (threading), which brings the yarn 12 to a state ready to be guided by the yarn guide 27. Furthermore, the traversing of the yarn 12 is started by the yarn guide 27.
  • the rotation of the package 15 that has been stopped can be started, and the traversing of the yarn 12 can be started after threading.
  • the winding of the yarn 12 into the package 15 therefore can be suitably started.
  • the conventional yarn winding machine performs threading to the yarn guide 27 when starting the rotation of the package 15 at the latest.
  • the threading is performed under an unstable condition where a tension applied to the yarn 12 is insufficient. This can lead to a failure in threading.
  • the threading needs to be performed with a sufficient tension applied to the yarn 12.
  • the present inventor has realized that, a while after the rotation of the package 15 is started, a sufficient tension comes to be applied to the yarn 12 that is wound into the package 15. In other words, when the winding of the package 15 is started, the rotating package 15 pulls the yarn 12 downstream (upward direction in FIG. 1 ). This results in application of a certain tension to the yarn 12 (with the yarn 12 being pulled taut).
  • the present inventor After repeating investigations regarding the above point, the present inventor has discovered that it takes a certain length of time, after the rotation of the package 15 is started, to produce the straight winding 99 large enough to cause an adverse effect on the quality of the package 15.
  • the quality of the package 15 is not affected for a while after starting the rotation of the package 15 even if no traversing of the yarn 12 is performed.
  • the experiments conducted by the present inventor have also revealed that the length of time required for applying a tension sufficient for threading the yarn 12 after the start of the rotation of the package 15 is shorter than the length of time required for producing the straight winding 99 large enough to cause an adverse effect on the quality of the package 15. Therefore, the quality of the package 15 would not be deteriorated even if the threading is waited until the tension applied to the yarn 12 becomes sufficient.
  • the yarn guide 27 is moved to the non-interrupting position when the rotation of the package 15 is being stopped, and after the rotation of the package 15 is started, the driving of the traversing device 21 is started after a predetermined traverse standby time is elapsed.
  • Step S110 After waiting for the predetermined traverse standby time from the start of the rotation of the package 15 (Step S110 as explained above), the driving of the traversing device 21 is started (Step S111 as explained above). Only then, the yarn guide 27 is moved in the traversing width direction as shown in FIG. 9 . In this manner, a sufficient tension can be applied to the yarn 12, and the threading can be conducted with the track of the yarn 12 being stabilized. The reliability of the threading is thereby improved.
  • the yarn 12 is continuously wound without being traversed. This would result in the straight winding 99 large enough to deteriorate the quality of the package 15 ( FIG. 10 ).
  • time is measured by the timer section 53.
  • the driving of the traversing device 21 is started when the traverse standby time is elapsed after the rotation of the package 15 is started.
  • the yarn 12 therefore would be wound into the package 15 without being traversed, no longer than a predetermined period of time.
  • the traversing of the yarn 12 can be reliably started by the traversing device 21 before any adverse effect is caused to the quality of the package 15.
  • a proper value for the traverse standby time varies in accordance with the type and/or winding speed of the yarn 12 and the like.
  • the automatic winder according to the present embodiment can change the traverse standby time as needed. More specifically, the operator can perform an operation of inputting or changing the traverse standby time on the main controller of the automatic winder so that the traverse standby time can be set for all the yarn winding units 10 of the automatic winder at a time.
  • the traverse standby time can also be set individually for the different yarn winding units 10.
  • the traverse standby time can be automatically set in accordance with winding conditions.
  • the automatic winder according to the present embodiment directly drives the package 15, and therefore the driving of the traversing device 21 can be started after reliably starting the rotation of the package 15.
  • a system of indirectly rotating the package 15 can be employed.
  • the system of indirectly rotating the package 15 includes, for example, driving the contact roller 20 to rotate and causing the package 15 to follow the rotation of the contact roller 20. When the package 15 is rotated in this manner, slipping can occur between the package 15 and the contact roller 20. When this occurs, even if driving of the contact roller 20 for rotation has been started, the rotation of the package 15 may not always be started.
  • the package 15 is directly driven by the package driving motor 24, the package 15 can be reliably rotated when the driving of the package driving motor 24 is started. Consequently, the threading can be performed while a tension sufficient to perform the threading is reliably applied to the yarn 12.
  • the yarn winding machine disclosed in Japanese Unexamined Patent Publication No. 2009-508782 moves the yarn guide while suctioning the yarn of the package. If the yarn guide becomes tangled with the undesired portion of the yarn pulled out due to the false yarn end finding, a breakage of the yarn guide can occur.
  • the yarn guide 27 is moved to the non-interrupting position. There is no possibility that the yarn guide 27 is broken by being tangled with the undesired portion of the yarn pulled out due to the false yarn end finding.
  • the undesired portion of the yarn can be pulled out of the package 15 and guided to the yarn joining device 37. If the yarn joining device 37 performs the yarn joining operation in this state, a poor-quality joined portion shall be formed. If the rotation of the package 15 is started in the winding direction under such a condition, the poor-quality joined portion can be wound into the package 15.
  • the threading is completed by the time the yarn joining operation is started. This means that the poor-quality joined portion can pass through the yarn guide when the rotation of the package is started after completion of the yarn joining operation. Then, the poor-quality joined portion can become tangled with the yarn guide and break the yarn guide. Because the yarn guide can catch the yarn during the false yarn end finding, both breakage of the yarn guide and production of a defective package can be incurred.
  • the yarn monitoring device 38 detects any poor-quality joined portion when starting the rotation of the package 15 after completion of the yarn joining operation. If the yarn monitoring device 38 detects a poor-quality joined portion, the unit controller 18 immediately operates the cutter 42 to cut the yarn 12. With this arrangement, even if a poor-quality joined portion is formed during the yarn joining operation, the yarn 12 can be immediately cut with the cutter 42. Moreover, the automatic winder according to the present embodiment does not perform the threading before the traverse standby time elapses from the start of the rotation of the package 15. Therefore, it is highly probable that the cutter 42 is operated to cut the yarn 12 before the threading.
  • the automatic winder includes the package driving motor 24, the yarn guide 27, and the unit controller 18.
  • the package driving motor 24 rotates the package 15 that has been brought to a stop and into which the yarn 12 is to be wound.
  • the yarn guide 27 is driven to reciprocate with the yarn 12 that is to be wound into the package 15 being guided (i.e., with the yarn 12 engaged with the yarn guide 27)
  • the yarn guide 27 traverses the yarn 12.
  • the unit controller 18 stops the driving of the yarn guide 27 when the rotation of the package 15 is stopped, and at such time, the yarn guide 27 does not guide the yarn 12 (i.e., the yarn guide 27 is disengaged from the yarn 12).
  • the unit controller 18 controls the package driving motor 24 and the yarn guide 27 such that the threading to the yarn guide 27 is performed and also the traversing of the yarn guide 27 can be started, by starting the reciprocating movement of the yarn guide 27 after the rotation of the package 15 is started in the winding direction.
  • the traversing of the yarn 12 is started after the rotation of the package 15 is started in the winding direction, and therefore the threading to the yarn guide 27 can be performed with a tension applied to the yarn 12. Consequently, the success rate can be improved in threading to the yarn guide 27.
  • the automatic winder includes the traverse driving motor 29 to drive the yarn guide 27 to reciprocate, separately from the package driving motor 24.
  • the unit controller 18 starts driving the traverse driving motor 29 after starting driving the package driving motor 24.
  • the control can be readily realized such that the threading is performed after the rotation of the package 15 is started.
  • the automatic winder according to the present embodiment further includes the timer section 53 that measures the length of time.
  • the unit controller 18 controls the yarn guide 27 such that, when the timer section 53 counts up to the predetermined length of elapsed time, the traversing by the yarn guide 27 is started.
  • the threading can be performed only after a suitable tension is applied to the yarn 12 that is to be wound into the package 15. Because the timing of starting the traversing is controlled by time, the traversing of the yarn 12 can be started within a predetermined length of time. Consequently, the traversing of the yarn 12 can be reliably started before the straight winding large enough to adversely affect the quality of the package 15 is formed.
  • the package driving motor 24 directly drives the package 15 to rotate.
  • the rotation of the package 15 can be reliably started by starting the driving of the package driving motor 24. Consequently, the threading can be performed after the rotation of the package 15 is reliably started.
  • the yarn guide 27 has the yarn hooking groove 30 that is open on its one end in the traversing direction of the yarn 12.
  • the yarn winding method includes the package driving process, the traversing process, and the starting process.
  • the package driving process the package 15 into which the yarn 12 is wound and that has been in the stopped state is rotated.
  • the traversing process the yarn 12 is traversed by driving the yarn guide 27 to reciprocate with the yarn guide 27 guiding the yarn 12 that is to be wound into the package 15.
  • the driving of the yarn guide 27 for the reciprocating movement is stopped when the rotation of the package 15 is stopped, and the driving of the yarn guide 27 for the reciprocating movement is started after the rotation of the package 15 in the winding direction is started.
  • the yarn winding method includes the timing process for measuring the length of time. With this yarn winding method, when the predetermined length of elapsed time is measured in the timing process, the traversing process is started.
  • the automatic winder starts driving the traversing device 21 from a time point when the amount of rotation of the package 15 reaches a predetermined amount after starting the rotation of the package 15.
  • the unit controller 18 measures the amount of rotation of the package 15 with the package rotation sensor 26. Because the package rotation sensor 26 outputs a pulse signal every predetermined angular degrees the package 15 rotates, the unit controller 18 can detect how much the package 15 rotates by counting the pulse signals.
  • the unit controller 18 When the rotation of the package 15 is stopped, the unit controller 18 holds the yarn guide 27 on standby at the non-interrupting position. Once the rotation of the package 15 is started, the unit controller 18 starts counting the pulse signals output by the package rotation sensor 26. When the number of pulse signals output by the package rotation sensor 26 reaches a predetermined number after the counting is started, the unit controller 18 judges that the amount of rotation of the package 15 reaches the predetermined amount, and starts the driving of the traversing device 21. With this arrangement, the threading to the yarn guide 27 is performed with a sufficient tension applied to the yarn 12, and therefore the success rate in the threading can be improved.
  • the automatic winder includes the package rotation sensor 26 that detects the rotation of the package 15.
  • the unit controller 18 controls the yarn guide 27 such that the traversing by the yarn guide 27 is started.
  • the yarn winding method followed by the automatic winder according to the second embodiment includes a rotation detecting process, in which the package rotation sensor 26 detects the rotation of the package 15.
  • the traversing process is started when the amount of rotation of the package 15 that is calculated based on the detection result obtained in the rotation detecting process reaches the predetermined value.
  • the timing of threading can be suitably controlled.
  • the amount of rotation of the package 15 is detected based on the output of the package rotation sensor 26.
  • the automatic winder of this modification example calculates a rotational speed of the package 15 based on the output of the package rotation sensor 26. Because the package rotation sensor 26 outputs a pulse signal every predetermined angular degrees the package 15 rotates, the unit controller 18 can calculate the rotational speed of the package 15 by counting the pulse signals output per unit time by the package rotation sensor 26.
  • the unit controller 18 calculates the rotational speed of the package 15 in real time based on the pulse signals output by the package rotation sensor 26.
  • the unit controller 18 provides control to start driving the traversing device 21. Consequently, the threading to the yarn guide 27 can be performed with a sufficient tension applied to the yarn 12, and therefore the success rate in the threading can be improved.
  • the unit controller 18 controls the yarn guide 27 such that the traversing by the yarn guide 27 is started when the rotational speed of the package 15 calculated based on the detection result obtained by the package rotation sensor 26 reaches a predetermined value.
  • the traversing process is started when the rotational speed of the package 15 calculated based on the detection result obtained in the rotation detecting process reaches the predetermined value.
  • the automatic winder starts driving the traversing device 21 when, after the rotation of the package 15 is started, the command value for the rotation frequency that is output from the rotation command section 54 to the package driving controller 25 reaches or exceeds a predetermined value.
  • the rotation command section 54 gradually increases the command value for the rotation frequency that is to be transmitted to the package driving controller 25. In this manner, the rotation of the package driving motor 24 can be gradually accelerated. Because the package 15 is driven by the package driving motor 24 to rotate, the command value for the rotation frequency that the rotation command section 54 transmits to the package driving controller 25 indicates the current rotational speed (rotation frequency) of the package 15.
  • the rotational speed (rotation frequency) of the package 15 can be found out by obtaining the command value for the rotation frequency output by the rotation command section 54.
  • the unit controller 18 monitors the command value for the rotation frequency that the rotation command section 54 transmits to the package driving controller 25. Upon detecting that the command value reaches or exceeds the predetermined rotation frequency, the unit controller 18 starts driving the traversing device 21. Consequently, the threading to the yarn guide 27 can be performed with a sufficient tension applied to the yarn 12, and therefore the success rate in the threading can be improved.
  • the automatic winder includes the rotation command section 54 that transmits the command value for the rotation frequency to the package driving controller 25.
  • the unit controller 18 controls the yarn guide 27 such that the traversing by the yarn guide 27 is started when the command value transmitted by the rotation command section 54 reaches the predetermined value.
  • the yarn winding method followed by the automatic winder according to the third embodiment includes a rotation command process in which the command value for the rotation frequency is transmitted to the package driving controller 25. With this yarn winding method, the traversing process is started when the command value reaches the predetermined value.
  • control By performing control based on the command value issued for the package driving controller 25, the control can be realized in accordance with the rotational speed of the package 15, without requiring a sensor such as the package rotation sensor 26 in the second embodiment. Consequently, the control can be readily realized such that the traversing is started when the rotational speed of the package 15 reaches or exceeds the predetermined speed after the start of the rotation of the package 15.
  • the structure of the present invention is not limited to the automatic winder; it can be widely applied to, for example, a rewinding machine, a spinning machine (air-jet spinning frame and open-end spinning frame) as well as any other yarn winding machines.
  • the pivoting shaft of the traverse arm 28 is substantially parallel to the yarn path of the yarn 12 that runs near the yarn guide 27, and the yarn guide 27 is driven to reciprocate on a plane substantially orthogonal to the yarn path.
  • the layout of the traversing device 21, however, is not limited thereto.
  • the layout of the yarn guide can be such that the yarn guide performs the reciprocating movement in a plane substantially parallel to the yarn path.
  • the traversing device 21 is not limited to an arm-type traversing device.
  • it can be a belt-type or a rotary-type traversing device.
  • the yarn guide 27 is shaped into a hook, but the shape is not limited thereto.
  • the shape is not limited thereto.
  • it can be of a finger type with its free end open.
  • the yarn winding unit 10 does not include any mechanical braking mechanism to stop the package 15; however, the yarn winding unit 10 can include such a braking mechanism.
  • the package rotation sensor 26 detects the rotation of the package 15 by detecting the rotation of the center bearing 22 that grips the package 15.
  • the structure of the rotation detecting section is not limited thereto, however.
  • the rotation of the package 15 can be detected by detecting the rotation of the center bearing 23, the rotation of the contact roller 20 that rotates in contact with the package 15, and/or the rotation of the package driving motor 24.
  • the rotation detecting section is not limited to the rotary encoder, but can be an angular velocity sensor.
  • the rotational speed of the package 15 is calculated in the modification example of the second embodiment.
  • the rotational speed for example, an angular velocity, the rotation frequency (number of rotations per unit time), the circumferential velocity of the package 15, and the like can be calculated.
  • a certain tension is applied to the yarn 12 by the tension applying device 36.
  • the objective is to produce a loosely wound package (fluffy package)
  • it can be chosen to apply a low tension (by slightly engaging the teeth of the tension applying device 36 with one another), or to apply no tension (by not operating the tension applying device 36 or omitting the tension applying device 36 from the structure) to wind the yarn 12 (soft winding).
  • the tension applied to the yarn tends to be insufficient, which results into a low success rate in the threading.
  • the success rate in the threading can be improved.
  • the driving source (package driving motor 24) for rotating the package 15 and the driving source (traverse driving motor 29) for driving the yarn guide 27 to reciprocate are separately arranged.
  • both the package and the yarn guide can be driven by a single driving source.
  • a clutch for example, is arranged between the yarn guide and the driving source.
  • the driving source starts the rotation of the package, the clutch is disengaged. After a certain period of time elapses, the clutch is engaged to start driving the yarn guide.
  • the package driving controller 25 and the traverse controller 31 are both arranged separately from the unit controller 18.
  • functions of at least either of the package driving controller 25 and the traverse controller 31 can be combined with those of the unit controller 18.
  • the package 15 is driven to rotate directly by the package driving motor 24.
  • the yarn winding unit 10 can include a motor that directly drives the contact roller 20 to rotate so that the package 15 can be rotated along with the contact roller 20.
  • a yarn winding machine includes a first driving section, a yarn guide, and a control section.
  • the first driving section drives a package into which a yarn is wound and that has been in a stopped state.
  • the yarn guide performs reciprocating movements to traverse and guide the yarn when the yarn is to be wound into the package.
  • the control section controls the first driving section and the yarn guide such that the yarn guide does not perform the reciprocating movements while rotation of the package is stopped, and the yarn guide starts the reciprocating movements after the rotation of the package in a winding direction is started.
  • the yarn winding machine further includes a second driving section that drives the yarn guide to perform the reciprocating movements, separately from the first driving section.
  • the structure in which the driving source for the rotation of the package and the driving source for traversing are arranged separately from each other facilitates the control for performing the threading after starting the rotation of the package.
  • the yarn winding machine further includes a timer that measures time.
  • the control section controls the yarn guide such that the yarn guide starts traversing when the time measured by the timer elapses a predetermined length of time.
  • the threading can be performed after a sufficient tension is applied to the yarn that is to be wound into the package, by simple control of starting the traversing of the yarn after an elapse of a predetermined length of time. Because the traversing start timing is controlled in accordance with time, the traversing of the yarn can be started within the predetermined length of time. Consequently, the traversing of the yarn can be reliably started before straight winding that is large enough to adversely affect the quality of the package is produced.
  • the yarn winding machine further includes a rotation detecting section that detects a parameter relating to the rotation of the package.
  • the control section controls the yarn guide such that the yarn guide starts traversing when any one of a rotation amount and a rotational speed of the package that is calculated based on the parameter detected by the rotation detecting section reaches a predetermined value.
  • the timing of threading can be suitably controlled.
  • the yarn winding machine further includes a rotation command section that transmits a command value for a rotational speed to the first driving section.
  • the control section controls the yarn guide such that the yarn guide starts traversing when the command value received from the rotation command section reaches a predetermined value.
  • the control in accordance with the rotational speed of the package can be realized without requiring, for example, any additional sensor such as a dedicated sensor for detecting the rotational speed of the package. This facilitates the control for performing the threading when the rotational speed of the package reaches or exceeds a predetermined speed after the rotation of the package is started.
  • the first driving section of the yarn winding machine directly drives the package to rotate.
  • the rotation of the package can be reliably started by starting the driving of the first driving section. Therefore, the threading can be performed after the rotation of the package is reliably started.
  • the yarn guide of the yarn winding machine includes a yarn hooking groove having one side open in a traversing direction of the yarn.
  • the threading can be readily performed simply by moving the yarn guide in a traversing direction.
  • a yarn winding method includes driving, traversing, and controlling.
  • driving a package into which a yarn is wound and that has been in a stopped state is driven to rotate.
  • traversing the yarn is traversed and guided by causing a yarn guide to perform reciprocating movements when the yarn is to be wound into the package.
  • controlling the yarn guide is controlled not to perform the reciprocating movements while rotation of the package is stopped, and to start the reciprocating movements after the rotation of the package is started in a winding direction.
  • the threading to the yarn guide can be performed with a tension applied to the yarn. This improves the success rate in the threading to the yarn guide.
  • the yarn winding method further includes measuring time. The traversing is started when the time measured at the measuring elapses a predetermined length of time.
  • the traversing of the yarn by the yarn guide can be started after a sufficient tension is applied to the yarn that is to be wound into the package. Because the traversing start time is controlled in accordance with time, the traversing of the yarn can be started within a predetermined time. Consequently, the traversing of the yarn can be reliably started before straight winding that is large enough to adversely affect the quality of the package is produced.
  • the yarn winding method further includes detecting a parameter relating to the rotation of the package.
  • the traversing is started when at least one of a rotation amount and a rotational speed of the package that is calculated based on the parameter detected at the detecting reaches a predetermined value.
  • the timing of performing the threading can be suitably controlled.
  • the yarn winding method further includes transmitting a command value for a rotational speed to a driving section that drives the package to rotate.
  • the traversing is started when the command value reaches a predetermined value.
  • the control can be realized in accordance with the rotational speed of the package without requiring, for example, any additional sensor such as a dedicated sensor for detecting the rotational speed of the package. Consequently, the control can be readily realized for performing the threading when the rotational speed of the package reaches or exceeds the predetermined speed after the rotation of the package is started.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Winding Filamentary Materials (AREA)
EP12195544.7A 2012-01-30 2012-12-04 Garnwickelmaschine und Garnwickelverfahren Withdrawn EP2620403A2 (de)

Applications Claiming Priority (1)

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JP2012016706A JP2013154991A (ja) 2012-01-30 2012-01-30 糸巻取機及び糸巻取方法

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Cited By (1)

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EP2937303A1 (de) * 2014-04-25 2015-10-28 Murata Machinery, Ltd. Wickeltrommel, wickelvorrichtung und garnwickelmaschine

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Publication number Priority date Publication date Assignee Title
JP2015036324A (ja) * 2013-08-13 2015-02-23 村田機械株式会社 糸巻取機及び糸巻取方法
JP2017088325A (ja) * 2015-11-11 2017-05-25 村田機械株式会社 糸引出装置及び糸巻取装置
US20200225136A1 (en) * 2017-08-25 2020-07-16 Nippon Steel Nisshin Co., Ltd. Thread guide wear testing machine and thread guide wear testing method

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JP2007210776A (ja) 2006-02-13 2007-08-23 Murata Mach Ltd 糸巻取方法及び糸巻取装置
JP2009508782A (ja) 2005-09-24 2009-03-05 エーリコン テクスティル ゲゼルシャフト ミット ベシュレンクテル ハフツング ウント コンパニー コマンディートゲゼルシャフト 糸通しする方法
JP2010042904A (ja) 2008-08-12 2010-02-25 Murata Machinery Ltd 糸巻取機

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JP2009508782A (ja) 2005-09-24 2009-03-05 エーリコン テクスティル ゲゼルシャフト ミット ベシュレンクテル ハフツング ウント コンパニー コマンディートゲゼルシャフト 糸通しする方法
JP2007210776A (ja) 2006-02-13 2007-08-23 Murata Mach Ltd 糸巻取方法及び糸巻取装置
JP2010042904A (ja) 2008-08-12 2010-02-25 Murata Machinery Ltd 糸巻取機

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2937303A1 (de) * 2014-04-25 2015-10-28 Murata Machinery, Ltd. Wickeltrommel, wickelvorrichtung und garnwickelmaschine

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