EP1314804A1 - Méthode et dispositif de détection d'anomalies pour la commande du système d'étirage d'une machine de filature - Google Patents

Méthode et dispositif de détection d'anomalies pour la commande du système d'étirage d'une machine de filature Download PDF

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Publication number
EP1314804A1
EP1314804A1 EP02026321A EP02026321A EP1314804A1 EP 1314804 A1 EP1314804 A1 EP 1314804A1 EP 02026321 A EP02026321 A EP 02026321A EP 02026321 A EP02026321 A EP 02026321A EP 1314804 A1 EP1314804 A1 EP 1314804A1
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EP
European Patent Office
Prior art keywords
drafting
driving
electric current
driving motor
abnormality
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Withdrawn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
EP02026321A
Other languages
German (de)
English (en)
Inventor
Yoshimasa Kabushiki Kaisha Fujii
Yutaka Kabushiki Kaisha Shinozaki
Kiwamu Kabushiki Kaisha Niimi
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.)
Toyota Industries Corp
Original Assignee
Toyota Industries Corp
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 Toyota Industries Corp filed Critical Toyota Industries Corp
Publication of EP1314804A1 publication Critical patent/EP1314804A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H13/00—Other common constructional features, details or accessories
    • D01H13/14—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
    • D01H1/14—Details
    • D01H1/20—Driving or stopping arrangements
    • D01H1/22—Driving or stopping arrangements for rollers of drafting machines; Roller speed control

Definitions

  • the present invention relates to an abnormality detecting method and an abnormality detecting device for the drafting device of a spinning machine and to a control device for a spinning machine and, more specifically, to an abnormality detecting method and an abnormality detecting device for the drafting device of a spinning machine in which the driving of the lifting driving system and the spindle driving system is effected by a motor separate from the one for the driving of the drafting part driving system and to a control device for such a spinning machine.
  • roving supplied from a roving bobbin is drafted by a drafting device and sent out from a front roller before it is taken up by a bobbin rotating integrally with the spindle by way of a snail wire, an anti-node ring, and a traveler traveling on the ring.
  • a drafting device is of a three line type consisting of front, middle, and back rollers in which front bottom, middle bottom, and back bottom rollers are driven by a single motor.
  • a device in which, to facilitate the changing of draft ratio, the front bottom roller and the back bottom roller are driven by separate motors, and a device in which, as a result of an increase in the number of spindles, the length of the machine base is large and motors are provided at both ends of the machine base, the bottom roller being driven from both sides of the machine base.
  • the value of the over-current or the value of the motor temperature rise serving as the reference value for stopping the driving of the motor, that is, for stopping the operation of the machine base is set to a level that will not cause damage to the motor.
  • the driving of the motor is continued as long as the motor is not under an overload condition, which means there is the danger of the parts of the drafting device being damaged.
  • Such a state is caused, for example, when the same motor is mounted on machine bases of different specifications and, depending on the machine base specifications, the load of the drafting device under an overload condition is smaller than the allowable load of the motor.
  • the present invention has been made in view of the above problem in the prior art. It is a first object of the present invention to provide an abnormality detecting method and an abnormality detecting device for the drafting device of a spinning machine which make it possible, with a simple construction, to detect that the drafting device is under an overload condition within the allowable load range of the driving motor of the drafting device.
  • a second object of the present invention is to provide a control device for a spinning machine capable of preventing the operation of the spinning machine from being continued, with the drafting device being in an abnormal state.
  • this invention provides an abnormality detecting method for a drafting device of a spinning machine in which separate motors are used for the driving of the lifting driving system and the spindle driving system and for the driving of the drafting part driving system.
  • monitoring is effected to see whether there is any variation in the load torque applied to the driving motor for driving the drafting roller.
  • the load torque varies to a degree not less than a predetermined ratio, it is determined that there is an abnormality.
  • monitoring is effected to see whether there is any variation in the load torque applied to the driving motor for driving the drafting roller, and when the load torque has varied to a degree not less than a predetermined ratio, it is determined that there is an abnormality.
  • the amount of electric current supplied to the driving motor is in proportion to the magnitude of the load torque. Since the load torque of the drafting roller remains constant unless the spinning conditions (spinning material and drafting ratio) are changed, a fixed amount of electric current is supplied to the driving motor in a fixed acceleration range and a constant speed range as long as the normal state is maintained.
  • the thickness of the supplied material is not uniform, and the number and length of the short fiber comprising the roving or sliver are not uniform either, meaning that the load torque of the drafting roller fluctuates slightly. Therefore, in the case of a variation to a degree not less than the fluctuation ratio attribute to non-uniformity of thickness, etc. of the supplied material, it is determined that there is an abnormality.
  • a sensor for detecting winding of roving or sliver around the drafting roller it is possible, with a simple construction, to detect that the drafting device is in an overload condition within the allowable load range of the driving motor of the drafting device.
  • the amount of electric current supplied to the driving motor is in proportion to the magnitude of the load torque applied to the driving motor. Thus, it is possible to detect whether there is any abnormality from variation in the electric current amount.
  • this invention provides an abnormality detecting device for the drafting device of a spinning machine in which the motor for driving the lifting driving system and the spindle driving system is different from the motor for driving the drafting part driving system.
  • the abnormality detecting device comprises electric current amount detecting means for detecting the amount of electric current supplied to the driving motor for driving the drafting roller, and judgment means which, in a state in which the acceleration or speed of the drafting roller is fixed, makes a judgment as to whether the amount of the supply electric current has varied to a degree not less than a predetermined ratio on the basis of a detection signal from the electric current amount detecting means and which outputs an abnormality signal when the amount of the supply electric current has varied to a degree not less than the predetermined ratio.
  • the amount of electric current supplied to the driving motor for driving the drafting roller is detected by the electric current amount detecting means.
  • the judgment means makes a judgment, in a condition in which the acceleration or speed of the drafting roller is fixed, as to whether the supply electric current amount has varied to a degree not less than a predetermined ratio on the basis of a detection signal from the electric current amount detecting means.
  • an abnormality signal is output.
  • this invention provides a control device for a spinning machine in which the lifting driving system and the spindle driving system are driven by a motor which is different from the motor for driving the drafting part driving system. Monitoring is effected to see whether there is any change in the load torque applied to the driving motor for driving the drafting roller; when an abnormality signal is output from an abnormality detecting device which determines that there is an abnormality when the load torque has varied to a degree not less than a predetermined ratio, control is effected to stop the operation of the spinning machine.
  • an abnormality in the drafting device is detected, the operation of the spinning machine is stopped, so that it is possible to reliably prevent the operation from being continued under an overload condition to cause damage to the parts. Further, it is also possible to perform control to stop the operation of the spinning machine when an abnormality signal is output from the abnormality detecting device continuously for a predetermined period of time.
  • Fig. 1 is a schematic plan view of a drafting device
  • Fig. 4 is a schematic side sectional view of the drafting device.
  • a drafting device 11 is of a three-line type construction equipped with a front bottom roller 12 serving as the drafting roller, a middle bottom roller 13, and a back bottom roller 14.
  • the front bottom roller 12 is supported at a predetermined position with respect to a roller stand (not shown), and the middle and back bottom rollers 13 and 14 are supported through the intermediation of a support bracket (not shown) fixed such that positional adjustment can be effected in the longitudinal direction with respect to the roller stand.
  • a bottom apron 15 is wrapped around a bottom tenser 16, a tensioner 17, and the middle bottom roller 13.
  • a front top roller 19, a middle top roller 20, and a back top roller 21 are supported by a weighting arm 18 at positions respectively corresponding to the front bottom roller 12, the middle bottom roller 13, and the back bottom roller 14 through the intermediation of a top roller support member 22.
  • An apron 22a is wrapped around the middle top roller 20.
  • Each of the top rollers 19 through 21 is supported as a pair consisting of two spindles.
  • the weighting arm 18 is equipped with a lever 18a rotatable between a pressurizing position and a rotating position.
  • a lever 18a rotatable between a pressurizing position and a rotating position.
  • the lever 18a In the condition in which the lever 18a is at the pressurizing position shown in Fig. 4, the lever being in contact with a frame 18b of the weighting arm 18; a lock state is maintained in which the top rollers 19 through 21 supported by the weighting arm 18 are at pressurizing positions (spinning positions), the top rollers being pressurized against the bottom rollers 12, 13, and 14 side.
  • the lock state is canceled.
  • drafting device 11 is provided symmetrically with respect to the machine base of the spinning machine, only one side thereof is shown in Fig. 4.
  • the bottom rollers 12 through 14 forming the drafting device 11 are arranged between gear boxes 23 and 24 so as to be parallel to each other.
  • the driving side gear box 23 contains a gear row (driving gearing) (not shown) for transmitting to the bottom rollers 12 through 14 on the right and left sides (on the upper and lower sides in Fig. 1) the rotation of a driving shaft 27 to which the rotation of a driving motor 25 is transmitted through a belt transmission mechanism 26.
  • a gear row (not shown) for connecting together the front bottom roller 12 and the middle bottom roller 13 on the left hand side and the front bottom roller 12 and the middle bottom roller 13 on the right hand side.
  • the driven side of the two back bottom rollers 14 is simply supported by a bearing and is not connected to the gear row.
  • the driving motor 25 is connected to an inverter 28, through which it undergoes speed change control by a machine base control device 29.
  • the inverter 28 inputs a direct current obtained by converting commercial power by an AC/DC converter (not shown) to the driving motor 25 to rotate the driving motor 25 at a predetermined RPM, so that an electric current corresponding to the load is output.
  • the inverter 28 is equipped with a motor current detecting circuit 30 as the electric current amount detecting means for detecting the amount of electric current supplied to the driving motor 25.
  • the machine base control device 29 is equipped with a CPU 31, a ROM 32, a RAM 33, an input device, and an input/output interface (not shown).
  • the machine base control device 29 is connected to the inverter 28 through a communication line 34.
  • the communication line 34 is constructed so as to allow serial communication using a serial interface.
  • the CPU 31 makes a judgment, on the basis of a detection signal from the motor current detecting circuit 30, as to whether the supply electric current amount has varied to a degree not less than a predetermined ratio or not and, at the same time, constitutes judgment means for outputting an abnormality signal when the supply electric current amount has varied to a degree not less than a predetermined ratio.
  • an abnormality detecting device for the drafting device 11 is formed by the motor current detecting circuit 30 and the CPU 31.
  • the expression: "variation to a degree not less than a predetermined ratio" refers to a variation beyond the ratio of fluctuation attributable to non-uniformity of thickness, etc. of the supplied material (roving).
  • the CPU 31 also controls a motor (not shown) for driving the lifting driving system and the spindle driving system, functioning also as a control device for the spinning machine.
  • a motor not shown
  • the CPU 31 performs control so as to stop the operation of the spinning machine.
  • the CPU 31 constitutes a control device which stops the operation of the spinning machine when an abnormality detection signal is output from the abnormality detecting device for the drafting device 11.
  • the ROM 32 stores program data and various items of data necessary for the execution thereof.
  • the program data includes various fiber materials, spinning conditions, such as count of spinning yarn and number of twist, spindle rotating speed during normal operation, correspondence data regarding the rotating speeds of the motors for the draft driving system and the lifting driving system, a map indicating the relationship between RPM and supply electric current amount at various winding amounts, etc.
  • the RAM 33 temporarily stores data input from the input device, results of computation processing in the CPU 31, etc.
  • the input device is used to input spinning condition data, such as spinning yarn count, fiber type (material), maximum spindle RPM during spinning operation, spinning length, lift length, chase length, and the length of the bobbin used.
  • the spinning conditions such as fiber material, spinning yarn count, and number of twist
  • the driving motor 25 is rotated and controlled through the inverter 28 in correspondence with the spinning conditions on the basis of a command from the machine base control device 29. Further, the driving motor for the spindle driving system and the lifting system is also controlled such that it attains a predetermined rotating speed.
  • roving R runs from the back rollers 14 and 21 of the drafting device 11 and passes between the front rollers 12 and 19 to be thereby drafted, and is then taken up in a take-up portion (not shown) by a bobbin rotated integrally with the spindle.
  • the motor current value detected by the motor current detecting circuit 30 is input to the machine base control device 29 through the communication line 34.
  • the CPU 31 constantly monitors the current value thereof. Then, it makes a judgment as to whether the current value has varied to a degree not less than a predetermined ratio; when the current value has varied to a degree not less than the predetermined ratio, it determines that there is an abnormality, and outputs an abnormality signal. On the basis of this abnormality signal, the control for stopping the operation of the machine base is executed, and informing means, such as a buzzer or an alarm lamp, is driven to inform the operator of the abnormality.
  • Fig. 2 is a graph showing change with passage of time in the RPM and torque (motor current) of the driving motor 25 in the condition in which the drafting device 11 is being driven in the normal manner
  • Fig. 3 is a graph showing change with passage of time in the RPM and torque (motor current) of the driving motor 25 in the case in which an abnormality has occurred in the drafting device 11. In the period as shown in Figs. 2 and 3, the taking-up speed of the spinning frame has not reached the maximum rotating speed.
  • the amount of electric current supplied to the driving motor 25 is in proportion to the magnitude of the load torque. Further, the load torque of the drafting roller is fixed unless the spinning material and the drafting ratio are changed.
  • the drafting device is driven by the driving motor 25 independently of the spindle driving system and the lifting driving system.
  • the motor current is fixed when the rotating speed varies at a fixed ratio, that is, when the acceleration is fixed. Also when the rotating speed is fixed, the motor current is fixed.
  • the load torque applied to the drafting roller increases as a result of the roving being wound around the drafting roller or the apron getting caught, the value of the motor current supplied to the driving motor 25 increases as shown in Fig. 3.
  • an abnormality in the load of the drafting roller is detected.
  • torque detecting means for detecting changes in the torque of the rotating portion between the output shaft of the driving motor 25 and the side end portion of the driving motor for the drafting roller as the detecting means for detecting the load torque applied to the driving motor 25.
  • a torque converter for example, is used.
  • the torque converter converts torque into an electric signal (e.g., voltage).
  • since the detection is performed on the rotating portion from the driving motor side end portion of the drafting roller to the output shaft of the driving motor 25, it is possible to reliably detect the load of the drafting roller.
  • inverter 28 with judgment means which performs monitoring to see whether there is any change in the load torque applied to the driving motor 25 and which determines that there is an abnormality when the load torque has varied to a degree not less than a predetermined ratio.
  • a construction may be adopted in which the front bottom roller 12 is driven by a single driving motor and in which the middle bottom roller 13 and the back bottom roller 14 are driven by another single driving motor. Then, the load torques applied to the driving motors are separately detected to make a judgment as to whether the device is under an overload condition or not. In this case, the changing of the drafting ratio is facilitated.
  • the reference value is not necessarily a spinning condition; it may also be a fixed value.
  • a comparator instead of using the CPU, it is also possible to use a comparator to make a judgment as to whether the value of the electric current supplied to the driving motor 25 has attained a predetermined value at which it is determined there is an abnormality. Further, it is also possible to compare the voltage value or the current value which is the output signal of the torque converter with a reference value to make a judgment as to whether there is any abnormality.
  • the drafting device 11 is not restricted to the three-line type one. It may also be a device having four or more drafting rollers on one side.
  • the present invention is applicable not only to a ring spinning frame but also to other types of spinning machines equipped with a drafting device, such as a ring spinning frame, a roving machine or the like, in which fine spinning thread is directly spun by drafting sliver omitting the roving stage.
  • the abnormality detecting device prefferably has, as the electric current detecting means for detecting the amount of electric current supplied to the driving motor for driving the drafting roller, judgment means which, in the condition in which the acceleration or the speed of the drafting roller remains constant, makes a judgment as to whether the supply electric current amount has varied to a degree not less than a predetermined ratio on the basis of a detection signal from the electric current amount detecting means and which outputs an abnormality signal when the supply electric current amount has varied to a degree not less than the predetermined ratio.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
EP02026321A 2001-11-26 2002-11-21 Méthode et dispositif de détection d'anomalies pour la commande du système d'étirage d'une machine de filature Withdrawn EP1314804A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2001359038 2001-11-26
JP2001359038A JP2003166135A (ja) 2001-11-26 2001-11-26 紡機のドラフト装置の異常検出方法及び異常検出装置並びに紡機の制御装置

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EP1314804A1 true EP1314804A1 (fr) 2003-05-28

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005071148A1 (fr) * 2004-01-23 2005-08-04 Maschinenfabrik Rieter Ag Procede pour eviter les defauts d'etirage sur une meche de fibres discontinues a etirer
EP1609893A2 (fr) * 2004-06-18 2005-12-28 Kabushiki Kaisha Toyota Jidoshokki Dispositif de détection d'une anomalie dans un sytème d'étirage pour un métier à filer
US8543017B2 (en) 2010-03-18 2013-09-24 Ricoh Company, Ltd. Load abnormality detection apparatus performing accurate judgment of cause of abnormality
CN103827366A (zh) * 2011-09-22 2014-05-28 村田机械株式会社 纺纱机、卷绕装置及纤维机械
CN108350616A (zh) * 2015-11-11 2018-07-31 欧瑞康纺织有限及两合公司 用于监控在织造期间的质量的方法以及织造装置
CN110359140A (zh) * 2019-07-10 2019-10-22 东华大学 一种牵伸过程中纤维变速点位置的测试方法
EP3599299A1 (fr) * 2018-07-23 2020-01-29 Murata Machinery, Ltd. Système de surveillance de charge, dispositif d'étirage, unité de filage et métier à filer

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4534887B2 (ja) * 2005-07-19 2010-09-01 株式会社豊田自動織機 紡機におけるドラフト装置の制御方法及び制御装置
JP5782930B2 (ja) 2010-09-16 2015-09-24 株式会社リコー 負荷異常検知装置、画像形成装置、負荷異常検知プログラム、及び負荷異常検知プログラムを格納したコンピュータ読み取り可能な記録媒体

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4646391A (en) * 1983-04-27 1987-03-03 Zinser Textilmaschinen Gmbh Spinners
DE3717749A1 (de) * 1987-05-26 1988-12-15 Zubler Geraetebau Verfahren zur aktiven fadenbruchverhinderung an spinn-, zwirn- und spulmaschinenantrieben sowie deren vollautomatisches ausregeln auf maximale produktionsdrehzahlen
DE4113565A1 (de) * 1991-04-25 1992-10-29 Zinser Textilmaschinen Gmbh Verfahren und vorrichtung zur ueberwachung der verzugskraft in streckwerken von spinnereimaschinen
DE19716981A1 (de) * 1996-05-13 1997-11-20 Rieter Ag Maschf Walzeneinrichtung zum Transportieren von Textilfasermaterial

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4646391A (en) * 1983-04-27 1987-03-03 Zinser Textilmaschinen Gmbh Spinners
DE3717749A1 (de) * 1987-05-26 1988-12-15 Zubler Geraetebau Verfahren zur aktiven fadenbruchverhinderung an spinn-, zwirn- und spulmaschinenantrieben sowie deren vollautomatisches ausregeln auf maximale produktionsdrehzahlen
DE4113565A1 (de) * 1991-04-25 1992-10-29 Zinser Textilmaschinen Gmbh Verfahren und vorrichtung zur ueberwachung der verzugskraft in streckwerken von spinnereimaschinen
DE19716981A1 (de) * 1996-05-13 1997-11-20 Rieter Ag Maschf Walzeneinrichtung zum Transportieren von Textilfasermaterial

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005071148A1 (fr) * 2004-01-23 2005-08-04 Maschinenfabrik Rieter Ag Procede pour eviter les defauts d'etirage sur une meche de fibres discontinues a etirer
EP1609893A2 (fr) * 2004-06-18 2005-12-28 Kabushiki Kaisha Toyota Jidoshokki Dispositif de détection d'une anomalie dans un sytème d'étirage pour un métier à filer
EP1609893A3 (fr) * 2004-06-18 2006-06-14 Kabushiki Kaisha Toyota Jidoshokki Dispositif de détection d'une anomalie dans un sytème d'étirage pour un métier à filer
US8855512B2 (en) 2010-03-18 2014-10-07 Ricoh Company, Ltd. Load abnormality detection apparatus performing accurate judgment of cause of abnormality
US8543017B2 (en) 2010-03-18 2013-09-24 Ricoh Company, Ltd. Load abnormality detection apparatus performing accurate judgment of cause of abnormality
CN103827366B (zh) * 2011-09-22 2016-08-17 村田机械株式会社 纺纱机、卷绕装置及纤维机械
CN103827366A (zh) * 2011-09-22 2014-05-28 村田机械株式会社 纺纱机、卷绕装置及纤维机械
CN108350616A (zh) * 2015-11-11 2018-07-31 欧瑞康纺织有限及两合公司 用于监控在织造期间的质量的方法以及织造装置
CN108350616B (zh) * 2015-11-11 2021-08-06 欧瑞康纺织有限及两合公司 用于监控在变形期间的质量的方法以及变形装置
EP3599299A1 (fr) * 2018-07-23 2020-01-29 Murata Machinery, Ltd. Système de surveillance de charge, dispositif d'étirage, unité de filage et métier à filer
CN110747542A (zh) * 2018-07-23 2020-02-04 村田机械株式会社 负载监视系统、牵伸装置、纺纱单元、纺纱机
CN110359140A (zh) * 2019-07-10 2019-10-22 东华大学 一种牵伸过程中纤维变速点位置的测试方法
CN110359140B (zh) * 2019-07-10 2021-08-27 东华大学 一种牵伸过程中纤维变速点位置的测试方法

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