EP2530040B1 - Garnwicklungsvorrichtung - Google Patents

Garnwicklungsvorrichtung Download PDF

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Publication number
EP2530040B1
EP2530040B1 EP12159034.3A EP12159034A EP2530040B1 EP 2530040 B1 EP2530040 B1 EP 2530040B1 EP 12159034 A EP12159034 A EP 12159034A EP 2530040 B1 EP2530040 B1 EP 2530040B1
Authority
EP
European Patent Office
Prior art keywords
package
deceleration
yarn
diameter
condition
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.)
Active
Application number
EP12159034.3A
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English (en)
French (fr)
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EP2530040A3 (de
EP2530040A2 (de
Inventor
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
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Publication date
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Publication of EP2530040A2 publication Critical patent/EP2530040A2/de
Publication of EP2530040A3 publication Critical patent/EP2530040A3/de
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Publication of EP2530040B1 publication Critical patent/EP2530040B1/de
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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
    • B65H63/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package
    • B65H63/08—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to delivery of a measured length of material, completion of winding of a package, or filling of a receptacle
    • B65H63/082—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to delivery of a measured length of material, completion of winding of a package, or filling of a receptacle responsive to a predetermined size or diameter of the package
    • 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
    • B65H54/40—Arrangements for rotating packages
    • B65H54/44—Arrangements for rotating packages in which the package, core, or former is engaged with, or secured to, a driven member rotatable about the axis of the package
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H63/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package
    • B65H63/02—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material
    • B65H63/024—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material responsive to breakage of materials
    • B65H63/036—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material responsive to breakage of materials characterised by the combination of the detecting or sensing elements with other devices, e.g. stopping devices for material advancing or winding mechanism
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2513/00—Dynamic entities; Timing aspects
    • B65H2513/10—Speed
    • B65H2513/11—Speed angular
    • 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 generally relates to a technique for controlling deceleration of a rotating package to stop the package in a yarn winding device that directly rotates the package.
  • Yarn winding devices in which a package is directly rotated using an electric motor are known in the art (see e.g. JP 2007-238275 A ). Such yarn winding devices generally do not have a mechanical braking system for stopping rotation of the package but stop the rotation of the package by performing deceleration control on the electric motor.
  • a yarn winding device known to the inventor performs the deceleration control at a constant deceleration rate (deceleration gradient) regardless of a diameter of the package (package diameter) inclusive of a yarn wound thereon as illustrated in FIG. 10 .
  • Deceleration rate means a time derivative (gradient of the graph illustrated in FIG. 10 ) of a rotational frequency (the number of rotations per second) of the package with the sign of the time derivative reversed from positive to negative and vice versa.
  • a control is performed so as to maintain circumferential speed of the package substantially constant to achieve a substantially constant running speed of the yarn wound onto the package. Accordingly, although the rotational frequency of the package is relatively high when the package diameter is small, the rotational frequency gradually decreases as the thickness of the package increases as more yarn is wound thereon (as the package diameter increases).
  • a package having a smaller diameter has a relatively smaller moment of inertia and hence can be decelerated to a stop in a shorter time.
  • a deceleration time (period of time from a start of deceleration of a package to a stop of the package) undesirably prolongs as the package diameter decreases (as the rotational frequency of the package increases).
  • FIG. 11 shows a relation between a package diameter and a deceleration time.
  • FIG. 12 illustrates a relation between a package diameter and a braking torque necessary to stop a rotating package.
  • the conventional yarn winding devices are disadvantageous in that when the package diameter is small, the deceleration time prolongs, while when the package diameter is large, problems such as generation of heat and slippage occur.
  • Japanese Patent Application Laid-open No. S62-215476 discloses a countermeasure to this issue.
  • the disclosed yarn winding device changes a deceleration gradient based on a function relating to the number of rotations of a bobbin holder or a bobbin diameter inclusive of a yarn wound thereon. It is expected that such a yarn winding device that changes the deceleration gradient based on the bobbin diameter inclusive of a yarn wound thereon can decelerate a package to a stop appropriately irrespective of the package diameter.
  • Japanese Patent Application Laid-open No. S62-215476 has disadvantages in that it is difficult for an operator to grasp concretely how the package is decelerated to a stop along the deceleration gradient because the deceleration gradient is determined by the function. Consequently, the operator cannot change the setting of the deceleration gradient intuitively even in situations where the setting needs to be changed. Accordingly, it is difficult or impossible for an operator to change the setting of the deceleration gradient appropriately even when it is necessary to change the setting of the deceleration gradient. In this regard, no description about operator's necessity of adjusting the deceleration gradient or the like is provided in Japanese Patent Application Laid-open No. S62-215476 .
  • an optimum deceleration gradient varies depending on various winding conditions, such as a type of a yarn and winding density of a package. Accordingly, appropriate deceleration control cannot be performed unless otherwise setting of the deceleration gradient is adjusted by an operator in a situation where a winding condition has been changed or the like.
  • a yarn winding device includes a package drive section, a package-diameter obtaining section, a deceleration-condition storage section, and a control section.
  • the package drive section directly rotates a package.
  • the package-diameter obtaining section obtains a current package diameter of the package.
  • the deceleration-condition storage section stores therein a plurality of deceleration conditions, each of which is associated with a hypothetical package diameter and used in controlling the package drive section to decelerate the package to a stop.
  • the control section controls the package drive section to decelerate the package to a stop according to the current package diameter obtained by the package-diameter obtaining section and a deceleration condition associated with a hypothetical package diameter corresponding to the current package diameter.
  • the package drive section is controlled according to the deceleration condition that depends on the package diameter. Accordingly, the package can be decelerated to a stop appropriately. This leads to less heat generation by the package drive section and optimization of deceleration-to-stop time. Furthermore, the deceleration conditions can be set intuitively because the deceleration conditions are set based on the package diameters.
  • the deceleration conditions stored in the deceleration-condition storage section preferably differ from each other in at least any one of a deceleration rate and a deceleration time.
  • the deceleration rate is a time derivative of a rotational frequency of the package with a sign of the time derivative reversed from positive to negative and vice versa.
  • the deceleration time is a period of time from a start of deceleration of the package to a stop of the package.
  • the deceleration rate or the deceleration time can be changed according to the package diameter, and hence the package can be decelerated to a stop appropriately.
  • the deceleration-condition storage section preferably stores therein at least a first deceleration condition for hypothetical package diameters that belong to a first range and a second deceleration condition for a second range to which hypothetical package diameters greater than the hypothetical package diameters belonging to the first range belong.
  • the second deceleration condition includes a smaller deceleration rate and a longer deceleration time than that included in the first deceleration condition.
  • classifying package diameters into at least two ranges, for each of which a deceleration condition is set separately as described above makes it possible to control the package drive section to decelerate the package to a stop with simple setting operation.
  • the package drive section is controlled to decelerate the package to a stop according to a deceleration condition set to have a smaller deceleration rate. Accordingly, a smaller load is placed on the package drive section.
  • the package drive section is controlled to decelerate the package to a stop according to a deceleration condition set to have a higher deceleration rate. Accordingly, it is possible to bring the package to a stop in a shorter time.
  • the first deceleration condition is preferably set such that a constant deceleration rate is applied to the package so long as the current package diameter belongs to the first range.
  • the second deceleration condition is preferably set such that a constant deceleration rate is applied to the package so long as the current package diameter belongs to the second range.
  • the first deceleration condition is preferably set such that a constant deceleration time is applied to the package so long as the current package diameter belongs to the first range.
  • the second deceleration condition is preferably set such that a constant deceleration time is applied to the package so long as the current package diameter belongs to the second range.
  • the yarn winding device preferably further includes a yarn feeding section and a yarn joining device.
  • the yarn feeding section feeds a yarn to be wound onto the package.
  • the yarn joining device joins a yarn end of a yarn from the package and a yarn end of a yarn from the yarn feeding section together to bring the yarn into a connected state.
  • the control section preferably controls the package drive section to decelerate the package to a stop before the yarn joining operation is performed by the yarn joining device.
  • Yarn winding devices that include a yarn joining device frequently decelerate rotation of a package to a stop.
  • yarn winding devices by controlling the package drive section to decelerate the package to a stop according to the package diameter, reduction of a load placed on the package drive section and optimization of deceleration-to-stop time can be achieved.
  • FIG. 1 is a schematic diagram of a winder unit 10 of an automatic winder serving as a yarn winding device according to an embodiment of the present invention.
  • the winder unit 10 shown in FIG. 1 winds a yarn 20 unwound from a yarn feeding bobbin 21 onto a winding bobbin 22 while causing the yarn 20 to traverse to form a package 30 of a predetermined length and shape.
  • the automatic winder (yarn winding device) according to the present embodiment includes a plurality of winder units 10 arranged side-by-side and a not shown machine control device.
  • Each of the winder units 10 includes a winding unit body 16 and a unit control section (control section) 50.
  • the unit control section 50 includes, for example, a not shown central processing unit (CPU), a random access memory (RAM), a read-only memory (ROM), and an input-output (I/O) port.
  • Computer programs for controlling components of the winding unit body 16 are stored in the ROM.
  • the machine control device is connected to the I/O port. An operator of the machine control device can manage or control collectively the winder units 10 as required.
  • the winding unit body 16 includes a cradle 23 and a yarn feeding section 19.
  • the cradle 23 rotatably supports the package 30.
  • the yarn feeding section 19 feeds the yarn 20 to the package 30.
  • the winding unit body 16 includes an unwinding assisting device 12, a tension applying device 13, a yarn joining device 14, and a yarn-quality measuring device 15 that are arranged on a yarn feed path between the yarn feeding section 19 and the cradle 23 in this order from the side of the yarn feeding section 19.
  • the yarn feeding section 19 supports the yarn feeding bobbin 21 in a substantially upright state.
  • the unwinding assisting device 12 includes a regulating member 40 that is vertically driven.
  • the regulating member 40 assists unwinding of the yarn 20 by coming into contact with the yarn 20 being unwound from the yarn feeding bobbin 21 to thereby apply an appropriate tension to the yarn 20.
  • a not shown sensor for detecting a chase portion of the yarn feeding bobbin 21 is arranged near the regulating member 40. When this sensor detects lowering of the chase portion, the regulating member 40 is lowered with, for example, a not shown air cylinder following the lowering of the chase portion.
  • the tension applying device 13 applies a predetermined tension to the running yarn 20.
  • a gate-type tension applying device can be used as the tension applying device 13.
  • Movable combs 37 are arranged between fixed combs 36 in the gate-type tension applying device.
  • the gate-type tension applying device can improve the quality of the package 30 by causing the yarn 20 to pass between the meshed combs 36 and 37 to thereby apply a uniform tension to the yarn 20.
  • a disk-type tension applying device can be used as the tension applying device 13.
  • the yarn joining device 14 connects (joins) a lower yarn from the yarn feeding bobbin 21 and an upper yarn from the package 30 when the yarn is cut due to some reason.
  • a yarn joining device that joins the upper yarn and the lower yarn a mechanical knotter or a yarn joining device that uses fluid, such as, compressed air can be used.
  • the yarn-quality measuring device 15 includes a clearer head 49 and an analyzer 47.
  • the clearer head 49 includes a not shown yarn-thickness sensor for detecting a thickness of the yarn 20.
  • the analyzer 47 processes a yarn-thickness signal output from the yarn-thickness sensor.
  • the yarn-quality measuring device 15 detects a yarn defect, such as a slub, by monitoring the yarn-thickness signal output from the sensor.
  • the yarn-quality measuring device 15 measures a length the yarn 20 has run.
  • the yarn-quality measuring device 15 can determine the length of a yarn defect in this manner, and hence can detect a yarn defect accurately.
  • a cutter 39 that cuts the yarn 20 immediately when the yarn-quality measuring device 15 detects a yarn defect is arranged near the clearer head 49.
  • a lower-yarn guiding pipe 25 that catches and guides a lower yarn, a yarn coming from the yarn feeding section 19, into the yarn joining device 14 is arranged below the yarn joining device 14.
  • An upper-yarn guiding pipe 26 that catches and guides an upper yarn, a yarn coming from the package 30, to the yarn joining device 14 is arranged above the yarn joining device 14.
  • the lower-yarn guiding pipe 25 and the upper-yarn guiding pipe 26 are pivotable about a shaft 33 and a shaft 35, respectively.
  • a suction port 32 is arranged at a distal end of the lower-yarn guiding pipe 25.
  • a suction mouth (yarn-end catcher) 34 is arranged at a distal end of the upper-yarn guiding pipe 26.
  • a not shown appropriate negative-pressure source is connected to each of the lower-yarn guiding pipe 25 and the upper-yarn guiding pipe 26. With this configuration, suction flows can be produced at the suction port 32 and the suction mouth 34 to suck and catch yarn ends of the upper yarn and the lower yarn.
  • the cradle 23 includes a pair of bearings 60 and 61.
  • the cradle 23 rotatably supports the winding bobbin 22 (and the package 30 formed by winding the yarn 20 thereonto) by arranging the winding bobbin 22 between the bearings 60 and 61.
  • the winding unit body 16 includes an arm-type traverse device 27 that causes the yarn 20 to traverse, and a contact roller 29 that rotates upon coming into contact with a peripheral surface of the winding bobbin 22 or a peripheral surface of the package 30.
  • the traverse device 27 includes an elongated arm member 28 configured to be swingable about a pivot shaft, a hook-shaped traverse guide 11 formed on a distal end of the arm member 28, and a traverse-guide drive motor 45 that drives the arm member 28.
  • the traverse-guide drive motor 45 includes a servo motor and causes the yarn 20 to traverse by moving the arm member 28 in a reciprocating swinging manner as indicated by a double-headed arrow in FIG. 1 .
  • the pivot shaft of the arm member 28 is substantially parallel to a plane where the winder unit 10 is installed.
  • the traverse device 27 may be configured as an arm-type traverse device in which the pivot shaft of the arm member 28 is substantially perpendicular to the plane where the winder unit 10 is installed.
  • the traverse device 27 is not limited to an arm-type traverse device, and can be a belt-type traverse device or a rotary traverse device, for instance.
  • a traverse control section 46 controls driving of the traverse-guide drive motor 45 according to an instruction from the unit control section 50.
  • the contact roller 29 is configured to come into contact with the surface of the package 30 to be rotated by rotation of the package 30 with the yarn 20, which is caused to traverse by the traverse guide 11, interposed between the contract roller 29 and the package 30. Accordingly, the yarn 20 is prevented from being traversed excessively, and the traverse device 27 can perform traversing of the yarn 20 appropriately.
  • a package drive motor (package drive section) 41 which is a servo motor, is mounted on the cradle 23.
  • the bearing 61 is fixed to a motor shaft of the package drive motor 41.
  • the package drive motor 41 directly rotates the winding bobbin 22 (and the package 30 with the yarn 20 wound thereonto) (what is called as a direct-drive system).
  • a motor driver 42 controls operations of the package drive motor 41.
  • the motor driver 42 applies a predetermined voltage to the package drive motor 41 according to a rotational-frequency designating signal from the unit control section 50 to rotate the package drive motor 41 at a designated rotational frequency (the number of rotations per unit time). Accordingly, the package 30 can be rotated at a desired rotational frequency.
  • the cradle 23 can move the winding bobbin 22 toward and away from the contact roller 29 by pivoting about a rotation shaft (support shaft) 48. Hence, an increase in the package diameter due to winding of the yarn 20 onto the winding bobbin 22 can be accommodated by pivoting of the cradle 23. More specifically, winding of the yarn 20 can be performed in a state where the contact roller 29 is appropriately contacting the surface of the package 30 even when the thickness of the package 30 has increased with the yarn 20 wound thereon.
  • a not shown air cylinder is coupled to the cradle 23.
  • the air cylinder applies an appropriate contact pressure between the package 30 and the contact roller 29.
  • the unit control section 50 controls operations of the air cylinder.
  • An angle sensor 44 that detects an angle (rotation angle) of the cradle 23 is attached to the rotation shaft 48.
  • a potentiometer for instance, can be used as the angle sensor 44.
  • the angle sensor 44 transmits an angle signal representing an angle of the cradle 23 to the unit control section 50.
  • the yarn 20 can be wound onto the winding bobbin 22 to form the package 30 of a predetermined shape by causing the package drive motor 41 to rotate the winding bobbin 22 while causing the traverse device 27 to traverse the yarn 20.
  • the automatic winder according to the present embodiment does not include a mechanical braking system for stopping the package 30, but stops rotation of the package 30 by performing deceleration control on the package drive motor 41.
  • the unit control section 50 performs the control of bringing the package 30 to a stop.
  • the unit control section 50 includes a deceleration-condition storage section 51 that stores therein a deceleration condition.
  • the deceleration condition defines how a rotational frequency of the package 30 is to be reduced when the control of decelerating the package 30 to a stop is performed.
  • the deceleration condition includes "deceleration rate" and "deceleration time".
  • the deceleration rate is a time derivative of the rotational frequency of the package 30 with a sign of the time derivative reversed from positive to negative and vice versa.
  • the deceleration time is a period of time from a start of deceleration of the package 30 to a stop of the package 30.
  • the deceleration condition can be presented in a graph where the rotational frequencies of the package 30 are plotted along the vertical axis, while time is plotted along the horizontal axis.
  • the graphs illustrated in FIGS. 3A to 3C depict deceleration conditions employed in the present embodiment. As illustrated in FIGS. 3A to 3C , the deceleration conditions are set such that the rotational frequency of the package 30 linearly decreases with time in the present embodiment.
  • the gradient of each of the graphs illustrated in FIGS. 3A to 3C corresponds to the deceleration rate.
  • the deceleration time undesirably prolongs when the package diameter is small, while loads placed on the package drive motor 41 and the motor driver 42 undesirably increase when the package diameter is large.
  • an optimum deceleration condition for a package having a smaller package diameter differs from that for a package having a larger package diameter.
  • the unit control section 50 changes the deceleration condition according to the package diameter. This will be explained more concretely below.
  • package diameters are classified into three ranges. More specifically, as illustrated in FIG. 2 , a range of relatively small package diameters is defined as a "first range”, a range of package diameters (medium-size package diameters) larger than those of the first range is defined as a “second range”, and a range of package diameters still larger than those of the second range is defined as a "third range”.
  • the rotational frequency of the package 30 decreases (the package 30 rotates more slowly) as the yarn 20 is wound onto the package 30 and the package diameter increases. Accordingly, the rotational frequency of the package 30 of a diameter that belongs to the second range is smaller than the rotational frequency of the package 30 of a diameter that belongs to the first range. The rotational frequency of the package 30 of a diameter that belongs to the third range is smaller than the rotational frequency of the package 30 of a diameter that belongs to the second range.
  • a plurality of deceleration conditions can be stored in the deceleration-condition storage section 51.
  • Each of the deceleration conditions can be associated with any one of the package diameter ranges (the first range, the second range, and the third range). More specifically, a first deceleration condition (the graph illustrated in FIG. 3A ) associated with the first range, a second deceleration condition (the graph illustrated in FIG. 3B ) associated with the second range, and a third deceleration condition (the graph illustrated in FIG. 3C ) associated with the third range can be stored in the deceleration-condition storage section 51.
  • a deceleration rate (the gradient of the graph illustrated in FIG. 3A ) set in the first deceleration condition is greater than a deceleration rate (the gradient of the graph illustrated in FIG. 3B ) set in the second deceleration condition.
  • the deceleration rate (the gradient of the graph illustrated in FIG. 3B ) set in the second deceleration condition is greater than a deceleration rate (the gradient of the graph illustrated in FIG. 3C ) set in the third deceleration condition.
  • a deceleration time over which the package 30 is to be decelerated to a stop under the first deceleration condition is likely to be shorter than a deceleration time over which the package 30 is to be decelerated to a stop under the second deceleration condition because the deceleration rates are set as described above.
  • the deceleration time over which the package 30 is to be decelerated to a stop under the second deceleration condition is likely to be shorter than a deceleration time over which the package 30 is to be decelerated to a stop under the third deceleration condition.
  • the unit control section 50 performs deceleration-to-stop control on the package 30 by switching among the deceleration conditions according to the current package diameter.
  • the unit control section 50 performs deceleration control on the package 30 according to the first condition.
  • the unit control section 50 performs deceleration control on the package 30 according to the second condition.
  • the unit control section 50 performs deceleration control on the package 30 according to the third condition.
  • FIG. 4 illustrates a relation between the diameter of the package 30 and a period of time over which the package 30 is decelerated to a stop.
  • the control according to the present embodiment can reduce the deceleration time of the package when the package diameter is small as compared with that of the conventional control (the control illustrated in FIG. 10 ) that applies a constant deceleration rate. Accordingly, the control according to the embodiment can reduce the time required to bring the package 30 to a stop, thereby increasing productivity of the automatic winder.
  • FIG. 5 illustrates a relation between the diameter of the package 30 and a braking torque necessary to stop the package 30.
  • the control according to the present embodiment can reduce the braking torque produced in the package drive motor 41 when the package diameter is large as compared with that of the conventional control (control illustrated in FIG. 10 ) that applies a constant deceleration rate. Accordingly, loads on the package drive motor 41 and the motor driver 42 are prevented from instantaneously increasing to be excessively high.
  • the package 30 having a larger moment of inertia is not braked suddenly, and hence slippage between the package 30 and the bearing 61 does not occur.
  • the deceleration condition can be set according to a package diameter as described above, which leads to an optimum deceleration-to-stop control.
  • the first deceleration condition is set so as to apply a constant deceleration rate (i.e., to make the gradient of the graph constant) so long as the package diameter is in the first range.
  • the second deceleration condition is set so as to apply a constant deceleration rate (i.e., to make the gradient of the graph constant) so long as the package diameter is in the second range.
  • the third deceleration condition is set so as to apply a constant deceleration rate (i.e., to make the gradient of the graph constant) so long as the package diameter is in the third range.
  • the deceleration conditions are set so as to apply a constant deceleration rate so long as the package diameter is in a predetermined range as described above. Therefore, the deceleration conditions can be set easily, and control operations to be performed by the unit control section 50 are also simplified.
  • Japanese Patent Application Laid-open No. S62-215476 discloses a technique that determines a deceleration gradient (deceleration rate) using a function of a package diameter.
  • this technique it is difficult to make adjustment so as to apply a deceleration rate that is optimum for both of a situation where the package diameter is smaller and a situation where the package diameter is larger, and hence the deceleration conditions cannot be set intuitively.
  • no description about operator's necessity of adjusting the deceleration gradient or the like is provided in Japanese Patent Application Laid-open No. S62-215476 .
  • hypothetical package diameters are classified into three ranges, and a deceleration condition is set separately for each range. Accordingly, an operator can intuitively set the deceleration conditions that depend on the package diameters.
  • an operator can perform test winding to set the first deceleration condition, the second deceleration condition, and the third deceleration condition. More specifically, the operator prepares a package having a small diameter belonging to the first range, a package having a medium diameter belonging to the second range, and a package having a large diameter belonging to the third range, and performs deceleration-to-stop control on each of the packages.
  • the operator decreases the current deceleration rate.
  • the operator increases the current deceleration rate.
  • the operator can intuitively set an optimum deceleration rate for each of the first range, the second range, and the third range. Thus, the operator can easily set optimum deceleration conditions according to the package diameter.
  • the machine control device transmits the set deceleration conditions (the first deceleration condition, the second deceleration condition, and the third deceleration condition) to the unit control section 50 of each of the winder units 10.
  • the unit control section 50 stores the received deceleration conditions in the deceleration-condition storage section 51.
  • the deceleration conditions in the plurality of winder units 10 of the automatic winder can be set at one time in this manner.
  • the automatic winder may be configured such that the deceleration conditions of each of the winder units 10 are set separately.
  • the yarn joining device 14 performs joining of yarns when the yarn 20 has broken between the yarn feeding section 19 and the package 30.
  • the unit control section 50 causes the traverse device 27 to stop traversing (Step S101).
  • the unit control section 50 obtains a current diameter of the package 30 (current package diameter) (Step S102) .
  • the unit control section 50 obtains the current package diameter based on a total length of the yarn 20 wound onto the package 30, and a winding speed and a yarn type (the thickness of the yarn 20 or the like) of the yarn 20. Accordingly, the unit control section 50 can be considered to function as a package-diameter obtaining section 52.
  • the package diameter can be empirically calculated based on the winding speed and the yarn type, and the length of the yarn 20 wound onto the package 30.
  • the package diameter can be calculated without involving complicated computation if a relation between lengths of the wound yarn 20 and package diameters is set in advance in the unit control section 50. Meanwhile, in the present embodiment, the length of the yarn 20 wound onto the package 30 is measured by the yarn-quality measuring device 15.
  • the unit control section 50 determines to which one of the first range, the second range, and the third range the current package diameter obtained at Step S102 belongs (Step S103).
  • the unit control section 50 reads out from the deceleration-condition storage section 51 a deceleration condition associated with the range to which the current package diameter belongs (Step S104).
  • the unit control section 50 outputs a rotational-frequency designating signal to the motor driver 42 according to the deceleration condition associated with the range of the package diameter. Hence, deceleration control can be performed on the package drive motor 41 using a deceleration rate according to the package diameter, thereby stopping rotation of the package 30 (Step S105). Thus, deceleration-to-stop control according to the package diameter can be implemented.
  • the unit control section 50 performs the joining of yarns by causing the lower-yarn guiding pipe 25 and the upper-yarn guiding pipe 26 to carry an upper yarn and a lower yarn to the yarn joining device 14, and driving the yarn joining device 14 (Step S106).
  • the unit control section 50 causes the package 30 to resume rotation and simultaneously causes the traverse device 27 to resume traversing of the yarn 20 (Step S107) . By these operations, winding of the yarn 20 onto the package 30 is resumed.
  • the automatic winder according to the present embodiment can perform appropriate deceleration control according to a package diameter during the joining operation, thereby minimizing time for bringing the package 30 to a stop and reducing the total duration of the joining operation. As a result, productivity of the winder unit 10 in producing of the package 30 can be increased.
  • the automatic winder includes the package drive motor 41, the package-diameter obtaining section 52, the deceleration-condition storage section 51, and the unit control section 50.
  • the package drive motor 41 directly rotates the package 30.
  • the package-diameter obtaining section 52 obtains a current package diameter.
  • the deceleration-condition storage section 51 stores therein a plurality of deceleration conditions, each of which is associated with a hypothetical package diameter and used in controlling the package drive motor 41 to decelerate the package 30 to a stop.
  • the unit control section 50 controls the package drive motor 41 to decelerate the package 30 to a stop according to the package diameter obtained by the package-diameter obtaining section 52 and the deceleration condition associated with a hypothetical package diameter corresponding to the current package diameter.
  • the package drive motor 41 is controlled according to the deceleration condition that depends on the package diameter as described above. Accordingly, the package 30 can be decelerated to a stop appropriately. This leads to less heat generation by the package drive motor 41 and the like and optimization of deceleration-to-stop time.
  • the deceleration conditions can be set intuitively because the deceleration conditions are set as being associated with package diameters.
  • the deceleration conditions stored in the deceleration-condition storage section 51 differ from each other in at least any one of the deceleration rate and the deceleration time.
  • the deceleration rate is a time derivative of the rotational frequency of the package 30 with a sign of the time derivative reversed from positive to negative and vice versa.
  • the deceleration time is a period of time from a start of deceleration of the package 30 to a stop of the package 30.
  • the deceleration rate or the deceleration time can be changed according to the package diameter. Accordingly, the package 30 can be decelerated to a stop appropriately.
  • the deceleration-condition storage section 51 stores therein at least the first deceleration condition for hypothetical package diameters that belong to the first range, and the second deceleration condition for the second range to which hypothetical package diameters greater than the hypothetical package diameters belonging to the first range belong.
  • the second deceleration condition includes a smaller deceleration rate and a longer deceleration time than that included in the first deceleration condition.
  • package diameters are classified into at least two ranges, for each of which a deceleration condition is set separately. Accordingly, the package drive motor 41 can be decelerated to a stop with simple setting operation.
  • the package drive motor 41 is decelerated to a stop according to the deceleration condition set to have a smaller deceleration rate. Accordingly, a smaller load is placed on the package drive motor 41.
  • the package drive motor 41 is decelerated to a stop according to the deceleration condition set to have a higher deceleration rate, thereby bringing the package 30 to a stop in a shorter time.
  • the first deceleration condition is set such that a constant deceleration rate is applied to the package 30 so long as the current package diameter belongs to the first range.
  • the second deceleration condition is set such that a constant deceleration rate is applied to the package 30 so long as the current package diameter belongs to the second range.
  • the automatic winder includes the yarn feeding section 19 and the yarn joining device 14.
  • the yarn feeding section 19 feeds the yarn 20 to be wound onto the package 30.
  • the yarn joining device 14 joins a yarn end of the yarn 20 from the package 30 and a yarn end of the yarn 20 from the yarn feeding section 19 together to bring the yarn 20 into a connected state.
  • the unit control section 50 controls the package drive motor 41 to decelerate the package 30 to a stop before the yarn joining operation is performed by the yarn joining device 14.
  • Yarn winding devices that include the yarn joining device 14 frequently decelerate rotation of the package 30 to a stop.
  • control is performed by applying a constant deceleration rate when the package diameter is in a predetermined range.
  • control is performed such that a package is decelerated to a stop over a constant deceleration time when the package diameter is in a predetermined range.
  • a deceleration time (the graph illustrated in FIG. 7A ) set in the first deceleration condition is shorter than a deceleration time (the graph illustrated in FIG. 7B ) in the second deceleration condition.
  • the deceleration time (the graph illustrated in FIG. 7B ) set in the second deceleration condition is shorter than a deceleration time (the graph illustrated in FIG. 7C ) included in the third deceleration condition.
  • the deceleration conditions are set such that when the package diameter belongs to the first range (when the package diameter is small), the package 30 is decelerated to a stop over a deceleration time that is shorter than that of the package 30 whose package diameter belongs to the second range (when the package diameter is medium-sized).
  • the package diameter belongs to the second range when the package diameter is medium-sized
  • the package 30 is decelerated to a stop over a deceleration time that is shorter than that of the package 30 whose package diameter belongs to the third range (when the package diameter is large).
  • the deceleration rate at which the package 30 is to be decelerated to a stop under the first deceleration condition is likely to be greater than the deceleration rate at which the package 30 is to be decelerated to a stop under the second deceleration condition because the deceleration times are set as described above.
  • the deceleration rate at which the package 30 is to be decelerated to a stop under the second deceleration condition is likely to be greater than the deceleration rate at which the package 30 is to be decelerated to a stop under the third deceleration condition. Accordingly, the modification can also yield the similar effect to that yielded by the embodiment.
  • the first deceleration condition is set so as to decelerate the package 30 to a stop over a constant deceleration time so long as the package diameter is in the first range.
  • the second deceleration condition is set so as to decelerate the package 30 to a stop over a constant deceleration time so long as the package diameter is in the second range.
  • the third deceleration condition is set so as to decelerate the package 30 to a stop over a constant deceleration time so long as the package diameter is in the third range.
  • the deceleration conditions are set so as to decelerate the package 30 to a stop over a constant deceleration time so long as the package diameter is in a predetermined range as described above. Accordingly, the deceleration conditions can be set easily, and control operations to be performed by the unit control section 50 are also simplified.
  • the value of braking torque suddenly changes at each of a boundary between the first range and the second range and a boundary between the second range and the third range as illustrated in FIG. 5 .
  • a deceleration rate changes greatly at each of the boundaries between the first range, the second range, and the third range because the deceleration conditions are set so as to keep the deceleration rate constant so long as the package diameter is in a predetermined range.
  • the first deceleration condition is set such that a constant deceleration time is applied to the package 30 so long as the package 30 has a diameter belonging to the first range.
  • the second deceleration condition is preferably set such that a constant deceleration time is applied to the package 30 so long as the package 30 has a diameter belonging to the second range.
  • a method of obtaining the package diameter is not limited to the method described above, and the package diameter can be obtained using various other methods.
  • the package diameter can be obtained by causing the angle sensor 44 to detect a rotation angle of the cradle 23. This is because the angle of the cradle 23 changes as the thickness of the package 30 increases with an increasing amount of the yarn 20 wound thereon.
  • the angle sensor 44 of the cradle 23 can be considered as the package-diameter obtaining section.
  • a time from when winding of the yarn 20 is started can be measured. If the winding speed and the yarn type (the thickness of the yarn 20 or the like) are known, the package diameter can be empirically calculated based on an elapsed time from when winding of the yarn 20 is started. To calculate the package diameter based on the elapsed time, one approach is to store in advance a relation between elapsed times from a start of winding and package diameters in the unit control section 50. Meanwhile, measurement of the elapsed time from a start of winding is desirably suspended while winding is suspended for yarn breakage, yarn joining operation, or the like. By suspending measurement in this manner, the package diameter can be obtained more accurately.
  • a yarn speed sensor may be arranged at some point on a running path of the yarn 20 to calculate the package diameter based on a running speed of the yarn 20 detected by the yarn speed sensor. More specifically, a winding angle is calculated based on the running speed and a traverse speed of the yarn 20. Furthermore, the circumferential speed of the package 30 is calculated based on the winding angle and the yarn speed. The package diameter can be calculated based on the number of rotations of the package 30 and the circumferential speed of the package 30.
  • the deceleration conditions that cause a rotational frequency of the package 30 to linearly decrease with respect to time as illustrated in FIGS. 3A to 3C have been described, the deceleration conditions are not limited thereto. As a matter of course, a deceleration condition that causes a rotational frequency of the package 30 to decrease in a curve with respect to time can alternatively be employed.
  • deceleration rate can be stored as numerical data.
  • graphs such as those illustrated in FIGS. 3A to 3C can be stored as two-dimensional tables.
  • package diameters are classified into the three ranges, for each of which a deceleration condition is set separately.
  • package diameters may be classified into two ranges or four or more ranges.
  • the greater the number of ranges the more finely deceleration conditions can be set, leading to optimum deceleration-to-stop control.
  • the number of ranges increases, the number of deceleration conditions that need to be set also increases, thereby placing greater burden on the operator. Accordingly, in terms of operator's ease in setting the deceleration conditions, it is preferable that the number of ranges be as less as three as in the embodiment.
  • the type of the package drive motor 41 (package drive section), and various types of motors, such as a stepping motor and an induction motor, can be used as the package drive motor 41.
  • the technique of the present invention is also applicable to a configuration in which the package 30 is rotated by rotation of the contact roller 29 that is driven to rotate.
  • the package drive motor 41 is used only to brake the package 30. More specifically, during normal winding, the package drive motor 41 is placed in a state where no voltage is applied, while the package 30 is rotated by rotation of the contact roller 29 that is driven to rotate. When it is required to stop the package 30, the cradle 23 is caused to pivot to separate the package 30 from the contact roller 29.
  • a predetermined voltage is applied to the package drive motor 41 while simultaneously controlling rotational frequency of the package drive motor 41, thereby decelerating the package 30 to a stop.
  • This configuration can also decelerate the package 30 to a stop according to the package diameter, thereby implementing optimum deceleration-to-stop control.

Landscapes

  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Winding Filamentary Materials (AREA)
  • Spinning Or Twisting Of Yarns (AREA)

Claims (6)

  1. Eine Garnwickelvorrichtung, die folgende Merkmale aufweist:
    einen Wickelkörperantriebsabschnitt (41), der angepasst ist, einen Wickelkörper (30) direkt anzutreiben;
    einen Wickelkörperdurchmesser-Gewinnungsabschnitt (52), der angepasst ist, einen aktuellen Wickelkörperdurchmesser des Wickelkörpers (30) zu gewinnen;
    einen Verzögerungsbedingungs-Speicherabschnitt (51), der angepasst ist, in demselben eine Mehrzahl von Verzögerungsbedingungen zu speichern, wobei jeder der Verzögerungsbedingungen ein hypothetischer Wickelkörperdurchmesser zugeordnet ist, wobei die Verzögerungsbedingung beim Steuern des Wickelkörperantriebsabschnitts (41) verwendet wird, um den Wickelkörper (30) zu einem Stopp zu verzögern; und
    einen Steuerabschnitt (50), der angepasst ist, den Wickelkörperantriebsabschnitt (41) zu steuern, um den Wickelkörper (30) gemäß dem aktuellen Wickelkörperdurchmesser, der durch den Wickelkörperdurchmesser-Gewinnungsabschnitt (52) gewonnen wird, und einer Verzögerungsbedingung, die einem hypothetischen Wickelkörperdurchmesser zugeordnet ist, der dem aktuellen Wickelkörperdurchmesser entspricht, zu einem Stopp zu verzögern.
  2. Die Garnwickelvorrichtung gemäß Anspruch 1, bei der die in dem Verzögerungsbedingungs-Speicherabschnitt (51) gespeicherten Verzögerungsbedingungen sich in einer Verzögerungsrate und/oder einer Verzögerungszeit unterscheiden, wobei die Verzögerungsrate ein Wert einer Zeitableitung einer Drehfrequenz des Wickelkörpers (30) ist, wobei ein Vorzeichen der Zeitableitung von positiv zu negativ umgekehrt wird und umgekehrt, wobei die Verzögerungszeit ein Zeitraum von einem Verzögerungsstart des Wickelkörpers (30) bis zu einem Stopp des Wickelkörpers (30) ist.
  3. Die Garnwickelvorrichtung gemäß Anspruch 2, bei der der Verzögerungsbedingungs-Speicherabschnitt (51) angepasst ist, zumindest eine erste Verzögerungsbedingung für hypothetische Wickelkörperdurchmesser, die zu einem ersten Bereich gehören, und eine zweite Verzögerungsbedingung für einen zweiten Bereich zu speichern, zu dem hypothetische Wickelkörperdurchmesser gehören, die größer als die zu dem ersten Bereich gehörenden hypothetischen Wickelkörperdurchmesser sind, und
    die zweite Verzögerungsbedingung eine niedrigere Verzögerungsrate und eine längere Verzögerungszeit als die umfasst, die in der ersten Verzögerungsbedingung beinhaltet sind.
  4. Die Garnwickelvorrichtung gemäß Anspruch 3, bei der
    die erste Verzögerungsbedingung derart festgelegt ist, dass eine konstante Verzögerungsrate auf den Wickelkörper (30) angewendet wird, solange der aktuelle Wickelkörperdurchmesser zu dem ersten Bereich gehört, und
    die zweite Verzögerungsbedingung derart festgelegt ist, dass eine konstante Verzögerungsrate auf den Wickelkörper (30) angewendet wird, solange der aktuelle Wickelkörperdurchmesser zu dem zweiten Bereich gehört.
  5. Die Garnwickelvorrichtung gemäß Anspruch 3, bei der
    die erste Verzögerungsbedingung derart festgelegt ist, dass eine konstante Verzögerungszeit auf den Wickelkörper (30) angewendet wird, solange der aktuelle Wickelkörperdurchmesser zu dem ersten Bereich gehört, und
    die zweite Verzögerungsbedingung derart festgelegt ist, dass eine konstante Verzögerungszeit auf den Wickelkörper (30) angewendet wird, solange der aktuelle Wickelkörperdurchmesser zu dem zweiten Bereich gehört.
  6. Die Garnwickelvorrichtung gemäß einem der Ansprüche 1 bis 5, die ferner folgende Merkmale aufweist:
    einen Garnzuführabschnitt (19), der angepasst ist, ein Garn (20) zuzuführen, das auf den Wickelkörper (30) zu wickeln ist; und
    eine Garnverbindungsvorrichtung (14), die angepasst ist, dann, wenn das Garn (20) getrennt ist, ein Garnende des Garns (20) von dem Wickelkörper (30) und ein Garnende des Garns (20) von dem Garnzuführabschnitt (19) miteinander zu verbinden, um das Garn (20) in einen verbundenen Zustand zu bringen, wobei
    der Steuerabschnitt (50) angepasst ist, den Wickelkörperantriebsabschnitt (41) zu steuern, um den Wickelkörper (30) zu einem Stopp zu verzögern, bevor durch die Garnverbindungsvorrichtung (14) ein Garnverbinden durchgeführt wird.
EP12159034.3A 2011-06-01 2012-03-12 Garnwicklungsvorrichtung Active EP2530040B1 (de)

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JP2014218314A (ja) 2013-05-01 2014-11-20 村田機械株式会社 糸巻取機
JP2016078995A (ja) * 2014-10-17 2016-05-16 村田機械株式会社 糸巻取装置及びパッケージ減速方法
JP2019052045A (ja) * 2017-09-19 2019-04-04 村田機械株式会社 繊維機械、管理装置、糸巻取システム及び糸巻取方法
DE102020119846A1 (de) 2020-07-28 2022-02-03 Saurer Spinning Solutions Gmbh & Co. Kg Verfahren zur Ermittlung des Massenträgheitsmoments von an Arbeitsstellen einer Textilmaschine hergestellten Kreuzspulen sowie eine Kreuzspulen herstellende Textilmaschine
DE102020132294A1 (de) * 2020-12-04 2022-06-09 Saurer Spinning Solutions Gmbh & Co. Kg Verfahren zur Zustandserfassung einer Spulenbremse sowie Arbeitsstelle einer Textilmaschine
DE102021118860A1 (de) * 2021-07-21 2023-01-26 Maschinenfabrik Rieter Ag Verfahren zum Betreiben einer Arbeitsstelle einer Textilmaschine sowie Arbeitsstelle einer Textilmaschine

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IT1223115B (it) * 1987-11-13 1990-09-12 Savio Spa Procedimento perfezionato di ripristino della continuita' el filo nella roccatura e dispositivi per la sua realizzazione
JPH08169637A (ja) * 1994-12-20 1996-07-02 Murata Mach Ltd 巻取方法
DE602004001410T2 (de) * 2003-03-17 2007-07-05 Murata Kikai K.K. Spulmaschine für Faden
JP2006009228A (ja) * 2004-06-28 2006-01-12 Toshibumi Morihashi 分繊巻取方法
JP2007238275A (ja) 2006-03-09 2007-09-20 Murata Mach Ltd 糸巻取装置
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EP2530040A3 (de) 2016-04-27
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JP2012250796A (ja) 2012-12-20
CN102807132B (zh) 2016-08-03

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