EP2700601A2 - Garnwickeleinheit und Garnwickelmaschine - Google Patents

Garnwickeleinheit und Garnwickelmaschine Download PDF

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Publication number
EP2700601A2
EP2700601A2 EP13175465.7A EP13175465A EP2700601A2 EP 2700601 A2 EP2700601 A2 EP 2700601A2 EP 13175465 A EP13175465 A EP 13175465A EP 2700601 A2 EP2700601 A2 EP 2700601A2
Authority
EP
European Patent Office
Prior art keywords
yarn
winding
traversing
package
section
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Withdrawn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
EP13175465.7A
Other languages
English (en)
French (fr)
Other versions
EP2700601A3 (de
Inventor
Tetsuya Namikawa
Yasunobu Tanigawa
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 EP2700601A2 publication Critical patent/EP2700601A2/de
Publication of EP2700601A3 publication Critical patent/EP2700601A3/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Withdrawn legal-status Critical Current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
    • 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
    • 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
    • B65H54/34—Traversing devices; Package-shaping arrangements for laying subsidiary winding, e.g. transfer tails
    • B65H54/343—Traversing devices; Package-shaping arrangements for laying subsidiary winding, e.g. transfer tails when starting winding on an empty bobbin
    • 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 yarn winding unit that winds a yarn, while traversing the yarn, into a package, and a yarn winding machine including such a yarn winding unit.
  • Yarn winding machines in which a winding tube is rotatably supported with a cradle and a yarn is wound, while being traversed, around an outer peripheral surface of the winding tube into a package are known in the art.
  • the yarn winding machines of this type include, for example, a traverse guide, which engages with and traverses the yarn, and a traverse driving section, which drives the traverse guide, as a yarn traversing structure.
  • Japanese Patent Application Laid-open No. 2009-227412 discloses a technique of controlling the traverse driving section to change a traversing width of a traversing device. More specifically, the yarn winding machine reduces the traversing width when a rotational speed (winding speed) of a package is rising, and increases the traversing width (to a normal traversing width) once the winding speed reaches a predetermined speed.
  • the yarn is joined and then caught by the traversing device. Thereafter, the rotational speed of the package is gradually increased while the yarn is being traversed.
  • the package is removed after being fully wound, and a new winding tube is supplied to the cradle, bunch winding or the like is formed around this winding tube. Thereafter, the yarn is caught by the traversing device, and the rotational speed of the package is gradually increased. If the traversing device is made to catch the yarn while the traversing speed is high, yarn breakage can occur when the traversing device touches the yarn.
  • Such yarn breakage tends to occur especially in a yarn winding machine in which a doffing device or the like forms bunch winding. How this happens is explained with reference to FIGS. 10A and 10B .
  • the traversing speed becomes zero at the end portions of the traversing width and reaches the highest at or about the center of the traversing width (center portion). Such minute details are not indicated in FIGS. 10A and 10B , however.
  • the traversing speed is synchronized with the rotational speed of the package in the yarn winding machine, and therefore the two speeds are indicated basically by the same lines.
  • FIG. 10A How the rotational speed of the package (i.e., the traversing speed) changes after yarn joining is shown in FIG. 10A .
  • the package is not rotated during the yarn joining, and therefore the initial rotational speed of the package is zero.
  • the traversing device catches the yarn at a predetermined timing (when time t a has elapsed) after the start of rotation of the package.
  • the traversing speed at this timing is represented as v a .
  • FIG. 10B How the rotational speed of the package (i.e., the traversing speed) that changes after a doffing device or the like forms bunch winding is shown in FIG. 10B .
  • the bunch winding is formed by the doffing device or the like while the package is already being rotated, and therefore the initial rotational speed of the package is not zero.
  • the acceleration of rotation of the package is the same, irrespective of whether it is after the bunch winding or after the yarn joining.
  • the timing at which the traversing device catches the yarn after the bunch winding with respect to the start of the yarn winding is also the same as the timing of catching the yarn after the yarn joining.
  • a yarn winding unit includes a winding section and a control section.
  • the winding section winds a yarn around a winding tube to form a package.
  • the control section controls the winding section.
  • the winding section includes a winding tube supporting section, a contact roller, and a traversing device.
  • the winding tube supporting section supports the winding tube.
  • the contact roller rotates in contact with the winding tube or the package.
  • the traversing device is arranged independently of the contact roller and traverses the yarn that is to be wound around the winding tube.
  • the control section controls the winding section such that a traversing speed of the traversing device is increased with a first acceleration when winding of the yarn is started while the winding tube or the package is at a stop and such that the traversing speed of the traversing device is increased with a second acceleration, which is lower than the first acceleration, when the winding of the yarn is started while the winding tube or the package is already being rotated.
  • a yarn winding machine includes a plurality of the yarn winding units.
  • an automatic winder (yarn winding machine) 1 includes a plurality of yarn winding units 10 that are arranged side by side, a doffing device (a winding tube supplying device and a bunch winding device) 60, and a main controller 90.
  • Each of the yarn winding units 10 traverses a yarn 20 that has been unwound from a supply bobbin 21 and winds the yarn 20 around a winding tube 22 that is supported by a cradle (winding tube supporting section) 23 to form a package 30.
  • the doffing device 60 moves to a position of this yarn winding unit 10, removes the fully wound package 30, and supplies a winding tube 22 (empty bobbin) around which no yarn 20 is wound yet.
  • the doffing device 60 includes a carriage section 61, a yarn drawing arm 62, a cradle releasing arm 63, and a gripping section 64.
  • the carriage section 61 is movable along a not-shown rail arranged above the yarn winding units 10 in the arrangement direction of the yarn winding units 10.
  • the yarn drawing arm 62 includes an air cylinder (cylinder) that is arranged in a substantially vertical direction. A leading end (lower end) of a cylinder rod of this air cylinder is configured in a manner as to catch the yarn 20. The yarn drawing arm 62 catches the yarn 20 and draws it toward the cradle 23.
  • the cradle releasing arm 63 operates and releases the cradle 23 to remove the fully wound package 30 from the cradle 23.
  • the gripping section 64 grips one of the winding tubes 22 stored in a bobbin container 38 ( FIG. 3 ), which will be described later, and pivots around a shaft 65 to mount the winding tube 22 onto the cradle 23.
  • the main controller 90 includes a machine setting section (setting section) 91 and a machine display section 92.
  • the machine setting section 91 performs settings onto each yarn winding unit 10.
  • the machine display section 92 has a function of displaying a winding state of the yarn 20 in each yarn winding unit 10, details of occurrence of errors, and the like.
  • each of the yarn winding units 10 includes a winding unit main body 16 and a control section 50.
  • the control section 50 includes a unit controller 51, a package driving controller 42, and a traverse driving controller 78.
  • the unit controller 51 includes, for example, a CPU, a RAM, a ROM, an I/O port, and a communication port.
  • a computer program for controlling each section of the winding unit main body 16 is recorded in the ROM.
  • Certain sections of the winding unit main body 16 and the main controller 90 are connected to the I/O port and the communication port of the unit controller 51 so that control information and the like can be communicated between the unit controller 51 and those sections of the winding unit main body 16.
  • the unit controller 51 thereby controls the operation of those sections of the winding unit main body 16.
  • the package driving controller 42 controls driving of the package 30 (more specifically, a package driving motor 41).
  • the traverse driving controller 78 controls driving of a traversing device 70 (more specifically, a traverse driving motor 76).
  • a yarn unwinding assisting device 12 In the winding unit main body 16, a yarn unwinding assisting device 12, a tension applying device 13, a yarn joining device 14, a clearer 15, and a winding section 18 are arranged in this order from the side of the supply bobbin 21 along a yarn running path between the supply bobbin 21 and a contact roller 29.
  • the yarn unwinding assisting device 12 lowers a regulating member 40, which caps a core tube of the supply bobbin 21, so as to assist unwinding of the yarn 20 from the supply bobbin 21.
  • the regulating member 40 makes contact with a balloon that is formed above the supply bobbin 21 by swinging and centrifugal force of the yarn 20 unwound from the supply bobbin 21, and controls the balloon under a suitable size, thereby assisting the unwinding of the yarn 20.
  • a not-shown sensor that detects a chase portion of the supply bobbin 21 is arranged near the regulating member 40. When this sensor detects lowering of the chase portion, the yarn unwinding assisting device 12 lowers the regulating member 40 by operating, for example, an air cylinder (not shown).
  • the tension applying device 13 applies a predetermined tension to the running yarn 20.
  • the tension applying device 13 can be, for example, of a gate type in which a fixed set of comb teeth and a movable set of comb teeth are arranged such that the two sets can engage with each other.
  • the movable set of comb teeth can be swung by a rotary solenoid so that the two sets of comb teeth are brought into an engaged state or a released state.
  • the tension applying device 13 can be, for example, of a disk type.
  • the yarn joining device 14 joins a lower yarn from the supply bobbin 21 and an upper yarn from the package 30 when the yarn 20 is cut due to a yarn defect detected by the clearer 15 or when the yarn 20 unwound from the supply bobbin 21 runs out.
  • the yarn joining device 14 can be of a mechanical type or of a type that uses fluid such as compressed air.
  • the clearer 15 includes a clearer head 49 having a not-shown sensor that detects a thickness of the yarn 20 and an analyzer 52 that processes a yarn thickness signal received from this sensor.
  • the clearer 15 monitors the yarn thickness signal received from the sensor to detect whether there is a yarn defect such as a slub.
  • a cutter 39 is arranged near the clearer head 49 to cut the yarn 20 immediately if the clearer 15 detects a yarn defect.
  • a lower yarn catching member 25 is arranged below the yarn joining device 14.
  • the lower yarn catching member 25 catches a yarn end from the supply bobbin 21 and guides it to the yarn joining device 14.
  • An upper yarn catching member (guiding member) 26 is arranged above the yarn joining device 14.
  • the upper yarn catching member 26 catches a yarn end from the package 30 and guides it to the yarn joining device 14.
  • the lower yarn catching member 25 includes a lower yarn pipe arm 33 and a lower yarn suction mouth 32 at a leading end of the lower yarn pipe arm 33.
  • the upper yarn catching member 26 includes an upper yarn pipe arm 36 and an upper yarn suction mouth 35 at a leading end of the upper yarn pipe arm 36.
  • the lower yarn pipe arm 33 and the upper yarn pipe arm 36 pivot around shafts 34 and 37, respectively.
  • a suitable negative pressure source (not shown) is connected to each of the lower yarn pipe arm 33 and the upper yarn pipe arm 36.
  • a suction flow is thereby produced at each of the lower yarn suction mouth 32 and the upper yarn suction mouth 35, allowing the lower yarn pipe arm 33 and the upper yarn pipe arm 36 to suck and catch the yarn ends of the upper yarn and the lower yarn, respectively.
  • the winding section 18 includes the cradle 23 that detachably supports the winding tube 22, the contact roller 29 that is rotatable in contact with the outer peripheral surface of the winding tube 22 or the outer peripheral surface of the package 30, and the traversing device 70.
  • the cradle 23 swings around a swing shaft 48.
  • the diameter of the yarn layer on the winding tube 22 increases as winding of the yarn 20 proceeds. This increase can be absorbed by swinging of the cradle 23.
  • the bobbin container 38 is arranged above the cradle 23 so that the winding tubes 22 can be stored therein.
  • the package driving motor (second driving section) 41 is coupled to the cradle 23.
  • the package driving motor 41 drives and rotates the winding tube 22 so that the yarn 20 is wound around the winding tube 22.
  • a motor shaft of the package driving motor 41 is coupled to the winding tube 22, which is now supported by the cradle 23, in a manner not to rotate relative to the winding tube 22 (i.e., a direct drive system).
  • the operation of the package driving motor 41 is controlled by the package driving controller 42.
  • the package driving controller 42 adjusts, upon receiving an instruction from the unit controller 51, a rotational speed (or an acceleration) of the package driving motor 41.
  • the traversing device 70 includes a traverse guide 74 and the traverse driving motor (first driving section) 76.
  • the traverse guide 74 engages with the yarn 20 to traverse the yarn 20.
  • the traverse guide 74 is driven by the traverse driving motor 76.
  • the traverse driving motor 76 is arranged separately from the package driving motor 41.
  • the operation of the traverse driving motor 76 is controlled by the traverse driving controller 78.
  • a yarn guiding section which is shaped into, for example, a hook, is formed at a leading end of the traverse guide 74.
  • the traversing device 70 performs reciprocal movements while the yarn guiding section is holding (guiding) the yarn 20, and the yarn 20 can thereby be traversed.
  • a guide plate 28 is arranged slightly upstream of the traversing position to guide the upstream yarn 20 to the traversing position.
  • the traversing speed of the traversing device 70 (reciprocating speed of the traverse guide 74) is controlled so as to be synchronized with the rotational speed of the package 30 (i.e., to correspond to the rotational speed).
  • the unit controller 51 instructs the package driving controller 42 to drive the package 30 at a determined rotational speed (or determined acceleration), and also instructs the traverse driving controller 78 to synchronize the traversing speed with the determined rotational speed.
  • the unit controller 51 includes a storage section 54. Options for the acceleration of rotation of the package 30 (i.e., the acceleration of the traversing of the traversing device 70) when starting the winding of the yarn 20 are recorded in this storage section 54.
  • the yarn 20 that has been unwound from the supply bobbin 21 runs substantially upwardly in the automatic winder 1 and is wound into the package 30.
  • the package driving controller 42 stops rotation of the package 30, and the traverse driving controller 78 stops driving of the traverse guide 74.
  • the lower yarn catching member 25 sucks and catches the yarn end of the lower yarn above the yarn unwinding assisting device 12.
  • the lower yarn catching member 25 pivots upwardly around the shaft 34, and introduces the lower yarn to the yarn joining device 14.
  • the upper yarn catching member 26 pivots upwardly around the shaft 37 from a position indicated in FIG. 3 , and sucks and catches the yarn end of the upper yarn from the package 30.
  • the upper yarn catching member 26 pivots downwardly around the shaft 37 and introduces the upper yarn to the yarn joining device 14, as shown in FIG. 4 .
  • the yarn joining device 14 joins the upper yarn and the lower yarn, thereby making the yarn 20 continuous between the supply bobbin 21 and the package 30.
  • the package driving controller 42 starts the rotation of the package 30, and the traverse driving controller 78 starts the driving of the traverse guide 74.
  • the traverse guide 74 catches the yarn 20 and starts the traversing of the yarn 20, the winding of the yarn 20 into the package 30 can be started (or resumed).
  • the unit controller 51 sends a signal to the clearer 15 to operate the cutter 39 and cut the yarn 20. Consequently, the yarn 20 downstream of the cutting position is wound into the package 30.
  • the unit controller 51 controls the lower yarn catching member 25 to pivot downwardly so that the yarn end of the lower yarn can be sucked into the lower yarn suction mouth 32.
  • the yarn 20 caught by the lower yarn catching member 25 is shown in a solid line in Fig. 5 .
  • the unit controller 51 also instructs the package driving controller 42 to stop the rotation of the package 30 and instructs the traverse driving controller 78 to stop the driving of the traverse guide 74.
  • the unit controller 51 sends a doffing request signal to the main controller 90.
  • the main controller 90 sends a signal to the doffing device 60.
  • the doffing device 60 moves to a position directly above the yarn winding unit 10 that has the fully wound package 30, and stops at this position.
  • the doffing device 60 operates the cradle 23 with the cradle releasing arm 63 and removes the fully wound package 30 from the cradle 23.
  • the removed package 30 is transferred to a not-shown conveyor belt arranged at the rear of the yarn winding unit 10.
  • the conveyor belt carries the package 30 to the next process.
  • the unit controller 51 controls the lower yarn catching member 25 to pivot upwardly, as indicated by a thick arrow in FIG. 5 , and to stay at a position indicated by a chained line in FIG. 5 (delivery position).
  • the doffing device 60 operates the air cylinder of the yarn drawing arm 62 to extend its length and lowers the leading end of the yarn drawing arm 62 toward the leading end of the lower yarn catching member 25 that is held at the delivery position (see FIG. 6 ).
  • the yarn drawing arm 62 thereby catches the yarn 20 near the lower yarn catching member 25.
  • the doffing device 60 operates the air cylinder of the yarn drawing arm 62 to contract its length so that the yarn 20 is pulled further upwardly.
  • the gripping section 64 grips one of the winding tubes 22 stored in the bobbin container 38 and supplies the winding tube 22 to the cradle 23.
  • the position of the yarn 20 caught by the yarn drawing arm 62 is adjusted so as to be set between the leading end of the winding tube 22 and the cradle 23.
  • the doffing device 60 instructs the yarn winding unit 10 to rotate the package 30 at low speed and form bunch winding.
  • the package driving controller 42 increases the rotation speed of the package 30, and the traverse driving controller 78 starts the driving of the traverse guide 74. With the traverse guide 74 that catches and traverses the yarn 20, the winding of the yarn 20 into the package 30 can be started.
  • the control of the rotational speed of the package 30, which is performed after the yarn is joined or after the bunch winding is formed by the doffing device 60 as explained above, is now explained with reference to FIGS. 7A and 7B , respectively.
  • the traversing speed is zero at the end of the traversing width, and reaches the maximum at or near the center of the traversing width (center portion).
  • Graphs in FIGS. 7A and 7B or in later-discussed FIGS. 8A and 8B do not show such details, however.
  • an acceleration is selected from two accelerations (first and second accelerations, the first acceleration being higher than the second acceleration) depending on the situation so that the traversing speed at the timing of catching the yarn 20 is lower than a predetermined speed (for example, a speed at which the yarn 20 breaks). More detailed explanation is presented below.
  • control section 50 (the package driving controller 42) does not allow the package 30 to rotate during the yarn joining. After the yarn joining, the control section 50 starts driving of both the package 30 and the traversing device 70 substantially at the same timing (in other words, the package 30 is at a stop when the winding of the yarn 20 is started).
  • the control section 50 performs control so that the rotational speed of the package 30 (i.e., the traversing speed of the traversing device 70) increases with the first acceleration.
  • the first acceleration is relatively high, the traversing speed of the traversing device 70 is not too high at the timing of catching the yarn 20 (after elapse of time t a ) because the rotation of the package 30 is accelerated from the stop state.
  • the control section 50 rotates the package 30 at a constant speed (prescribed winding speed).
  • the control section 50 (the package driving controller 42) rotates the package 30 at low speed during the bunch winding, and accelerates the rotation of the package 30 after the bunch winding is completed. In other words, in the situation of the bunch winding, the package 30 is already being rotated when the winding of the yarn 20 is started.
  • the control section 50 controls the rotational speed of the package 30 (i.e., the traversing speed of the traversing device 70) such that the rotation is accelerated at the second acceleration. Since the second acceleration is relatively low, the traversing speed of the traversing device 70 is not too high at the timing of catching the yarn 20 (after elapse of the time t a ) as the package 30 is accelerated when the package 30 is already rotating. Subsequently, when the package 30 reaches the predetermined rotational speed, the control section 50 rotates the package 30 at a constant speed (prescribed winding speed). The acceleration of rotation of the package 30 can be increased steeply after the yarn 20 is caught in order to cause the package 30 to reach the predetermined rotational speed in a shorter time.
  • the traversing speed is prevented from overly increasing when catching the yarn 20. Consequently, yarn breakage that tends to occur when the traversing device 70 (more specifically, the yarn guiding section of the traverse guide 74) touches the yarn 20 is reliably prevented.
  • any method can be adopted for the unit controller 51 to determine whether the current state is after the yarn joining or after the bunch winding.
  • the unit controller 51 is aware of the yarn joining or the bunch winding (doffing) that has been performed, and therefore the determination can be made based on this information.
  • the determination can be made based on the rotational speed of the package 30 at the start of the winding of the yarn 20 (or immediately before the driving of the traversing device 70).
  • the operator can select and instruct one of the accelerations for the package 30 (i.e., the traversing device 70) by operating the setting section 55 or the machine setting section 91.
  • the accelerations include one that is to be set after the yarn joining (when the winding of the yarn 20 is started with the package 30 being at a stop) and one that is to be set after the bunch winding (when the winding of the yarn 20 is started while the package 30 is already being rotated). For example, if the yarn 20 is thin, the operator can appropriately select relatively low accelerations so that yarn breakage can be reliably prevented.
  • FIGS. 8A and 8B show how the rotational speed of the package 30 and the traversing speed of the traversing device 70 change after the bunch winding is performed by the doffing device 60.
  • the control section 50 performs control so that, even after the bunch winding is performed by the doffing device 60, the package 30 (i.e., the traversing device 70) is rotated at a relatively high acceleration (the first acceleration); however, the control section 50 sets the timing of catching the yarn 20 ahead. Consequently, the traversing speed can be prevented from overly increasing when catching the yarn 20. This can prevent yarn breakage that tends to occur when the traversing device 70 touches the yarn 20.
  • the timing of catching the yarn 20 and the acceleration for the traversing speed of the traversing device 70 can be adjusted at the same time.
  • the control section 50 synchronizes the rotational speed of the package 30 with the traversing speed.
  • the acceleration of rotation of the package 30 is set (adjusted) such that the traversing speed of the traversing device 70 would not follow the rotational speed of the package 30.
  • the traversing speed of the traversing device 70 is thereby prevented from rapidly increasing, and the traversing speed when catching the yarn 20 can be suppressed.
  • the yarn winding unit 10 includes the winding section 18 and the control section 50.
  • the winding section 18 winds the yarn 20 around the winding tube 22 to form the package 30.
  • the control section 50 controls the winding section 18.
  • the winding section 18 includes the cradle 23, the contact roller 29, and the traversing device 70.
  • the cradle 23 supports the winding tube 22.
  • the contact roller 29 rotates in contact with the winding tube 22 or the package 30.
  • the traversing device 70 is arranged independently of the contact roller 29, and traverses the yarn 20 that is to be wound around the winding tube 22.
  • the control section 50 controls the winding section 18 so that the traversing speed of the traversing device 70 is kept equal to or below a predetermined speed when starting the winding of the yarn 20.
  • the traversing speed of the traversing device 70 when catching the yarn 20 is equal to or below a predetermined speed. Consequently, the traversing device 70 (more specifically, the traverse guide 74) can be prevented from operating at high speed, and yarn breakage that tends to occur when the traversing device 70 touches the yarn 20 can be prevented.
  • the yarn winding unit 10 includes the storage section 54 in which at least the first acceleration and the second acceleration lower than the first acceleration are recorded.
  • the control section 50 performs control such that the traversing speed of the traversing device 70 is increased with the first acceleration when the winding of the yarn 20 is started while the package 30 is at a stop, and that the traversing speed of the traversing device 70 is increased with the second acceleration when the winding of the yarn 20 is started while the package 30 is already being rotated.
  • the control section 50 controls the winding section 18 in a process of forming a single package 30 such that the traversing speed of the traversing device 70 is increased appropriately with the first acceleration or the second acceleration at a given time.
  • the automatic winder 1 includes the doffing device 60, the yarn joining device 14, and the upper yarn catching member 26.
  • the doffing device 60 forms the bunch winding around the winding tube 22 supplied to the winding section 18.
  • the yarn joining device 14 joins the guided yarn 20.
  • the upper yarn catching member 26 guides the yarn end from the package 30 to the yarn joining device 14.
  • the control section 50 drives the traversing device 70 with the second acceleration.
  • the control section 50 drives the traversing device 70 with the first acceleration.
  • the rotational speed of the package 30 is higher after the bunch winding than after the yarn joining. Therefore, the traversing speed of the traversing device 70 when catching the yarn 20 can be prevented from overly increasing, and the yarn 20 can be prevented from being broken.
  • different accelerations are adopted for the traversing device 70 after the yarn joining and after the bunch winding performed by the doffing device 60.
  • Any structure that can control the winding section 18 such that the traversing speed of the traversing device 70 when starting the winding of the yarn 20 is maintained equal to or below a predetermined speed falls into the scope of the present invention.
  • the winding is usually started after the package 30 is stopped. This means that, even if the rotational speed of the package 30 is increased with a relatively high acceleration (the first acceleration, for example), the yarn 20 can still be prevented from being broken.
  • the rotational speed of the package 30 (or the traversing speed of the traversing device 70) can be varied in various manners.
  • the speed can be varied in the form of a curved line, or can be changed in steps.
  • the traversing speed of the traversing device 70 does not always need to be synchronized with the rotational speed of the package 30, i.e., the traversing speed of the traversing device 70 can be directly controlled.
  • a motor of any type can be used for the package driving motor 41.
  • a servomotor or a step motor can be used.
  • An alternative structure can be such that the contact roller 29 is driven by a suitable driving device so that the package 30 can be rotated in accordance with the rotating contact roller 29.
  • a motor of any type can be used for the traverse driving motor 76 also, a motor of any type can be used.
  • the traverse driving motor 76 can be a servomotor, a step motor, or even a voice coil motor.
  • the traversing device 70 is reciprocated on a substantially horizontal plane with respect to an installation surface of the yarn winding unit 10.
  • the longitudinal direction of the traversing device can be substantially perpendicular to the installation surface of the yarn winding unit.
  • a belt-type or rod-type traversing device can be adopted.
  • the doffing device 60 performs operations of doffing, supplying the winding tubes 22, and forming bunch winding. These operations can be separately performed by separate devices.
  • the package 30 has been assumed to be a cheese package.
  • the present invention is applicable to a package with tapered end surfaces or a cone package.
  • the present invention is applicable not only to the automatic winder, but also to other yarn winding machines including a rewinding machine and a spinning machine (such as an air-jet spinning machine and an open-end spinning machine).
  • a yarn winding unit includes a winding section and a control section.
  • the winding section winds a yarn around a winding tube to form a package.
  • the control section controls the winding section.
  • the winding section includes a winding tube supporting section, a contact roller, and a traversing device.
  • the winding tube supporting section supports the winding tube.
  • the contact roller rotates in contact with the winding tube or the package.
  • the traversing device is arranged independently of the contact roller and traverses the yarn that is to be wound around the winding tube.
  • the control section controls the winding section such that a traversing speed of the traversing device is increased with a first acceleration when winding of the yarn is started while the winding tube or the package is at a stop and such that the traversing speed of the traversing device is increased with a second acceleration, which is lower than the first acceleration, when the winding of the yarn is started while the winding tube or the package is already being rotated.
  • the traversing speed of the traversing device when catching the yarn can be maintained equal to or below a predetermined speed. Consequently, the yarn breakage that tends to occur when the traversing device touches the yarn at high speed can be prevented.
  • the yarn winding unit preferably includes a storage section that records therein the first acceleration and the second acceleration that is lower than the first acceleration.
  • the control section controls the winding section such that the traversing speed of the traversing device is increased with the first acceleration when winding of the yarn is started while the winding tube or the package is at a stop and such that the traversing speed of the traversing device is increased with the second acceleration, which is lower than the first acceleration, when the winding of the yarn is started while the winding tube or the package is already being rotated.
  • control section preferably controls the traversing speed of the traversing device such that the traversing speed corresponds to a rotational speed of the winding tube or the package.
  • the traversing speed of the traversing device When bringing the traversing speed of the traversing device into correspondence with the rotational speed of the winding tube or the package, if the winding tube or the like has already been rotating before driving the traversing device (after the bunch winding or the like), the traversing speed of the traversing device significantly increases as the rotational speed of the winding tube or the package increases. As discussed above, however, by adjusting the acceleration of the traversing of the traversing device or the like (i.e., the acceleration of the rotation of the winding tube or the like) based on the rotational speed of the winding tube or the package, the traversing speed of the traversing device can be kept from overly increasing when catching the yarn, thereby preventing the yarn breakage.
  • the acceleration of the traversing of the traversing device or the like i.e., the acceleration of the rotation of the winding tube or the like
  • the traversing device preferably includes a traverse guide that traverses the yarn in engagement with the yarn, and a first driving section that reciprocally drives the traverse guide.
  • the yarn winding unit preferably further includes a second driving section that is arranged independently of the first driving section and that drives the winding tube or the package to rotate.
  • control is performed such that, for example, the traversing device is driven at a low traversing speed. Consequently, the yarn breakage that tends to occur when the traversing device touches the yarn can be prevented.
  • a yarn winding machine includes a plurality of yarn winding units.
  • the yarn winding machine that can prevent the yarn breakage that tends to occur when the traversing device touches the yarn can be realized.
  • the yarn winding machine preferably includes a setting section that sets an acceleration of traversing of the traversing device that is to be used when starting the winding of the yarn.
  • the acceleration of the traversing can be reduced, or the timing at which the traversing device catches the yarn can be set ahead.
  • the yarn breakage that tends to occur when the traversing device touches the yarn can thereby be reliably prevented.
  • the yarn winding machine preferably includes a winding tube supplying device that supplies the winding tube to the winding section of at least any one of the yarn winding units.
  • the yarn winding machine preferably further includes a bunch winding device, a yarn joining device, and a guiding member.
  • the bunch winding device forms bunch winding around the winding tube supplied by the winding tube supplying device to the winding section.
  • the yarn joining device joins the yarn that is guided.
  • the guiding member guides at least an end of the yarn from the package to the yarn joining device.
  • the control section controls the winding section such that the traversing device is driven to increase the traversing speed with the second acceleration after the bunch winding device forms the bunch winding and to increase the traversing speed with the first acceleration, which is higher than the second acceleration, after the yarn joining device joins the yarn.
  • the rotational speed of the package after the bunch winding is higher than the rotational speed after the yarn joining.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Winding Filamentary Materials (AREA)
EP13175465.7A 2012-08-23 2013-07-08 Garnwickeleinheit und Garnwickelmaschine Withdrawn EP2700601A3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2012184019A JP2014040316A (ja) 2012-08-23 2012-08-23 糸巻取ユニット及び糸巻取機

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EP2700601A2 true EP2700601A2 (de) 2014-02-26
EP2700601A3 EP2700601A3 (de) 2014-08-27

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Cited By (1)

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Publication number Priority date Publication date Assignee Title
CN109911694A (zh) * 2017-12-12 2019-06-21 村田机械株式会社 纱线卷取机、纱线卷取方法以及存储介质

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Publication number Priority date Publication date Assignee Title
DE102014011817A1 (de) * 2014-08-08 2016-02-11 Saurer Germany Gmbh & Co. Kg Verfahren und Vorrichtung zum Bewickeln einer Auflaufspule
JP2020203780A (ja) * 2019-06-19 2020-12-24 村田機械株式会社 糸巻取装置及びバンチ形成方法
CN111309063B (zh) * 2020-02-27 2021-04-06 广东利元亨智能装备股份有限公司 放卷速度控制方法、装置、电子设备及存储介质

Citations (1)

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Publication number Priority date Publication date Assignee Title
JP2009227412A (ja) 2008-03-24 2009-10-08 Murata Mach Ltd 糸巻取機及び糸巻取方法

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009227412A (ja) 2008-03-24 2009-10-08 Murata Mach Ltd 糸巻取機及び糸巻取方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109911694A (zh) * 2017-12-12 2019-06-21 村田机械株式会社 纱线卷取机、纱线卷取方法以及存储介质

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