EP1609893A2 - Vorrichtung zum Nachweis eines abnormalen Zustandes in einem Streckwerk einer Spinnmaschine - Google Patents

Vorrichtung zum Nachweis eines abnormalen Zustandes in einem Streckwerk einer Spinnmaschine Download PDF

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Publication number
EP1609893A2
EP1609893A2 EP05011192A EP05011192A EP1609893A2 EP 1609893 A2 EP1609893 A2 EP 1609893A2 EP 05011192 A EP05011192 A EP 05011192A EP 05011192 A EP05011192 A EP 05011192A EP 1609893 A2 EP1609893 A2 EP 1609893A2
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EP
European Patent Office
Prior art keywords
drafting
motors
abnormality
rollers
load
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.)
Granted
Application number
EP05011192A
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English (en)
French (fr)
Other versions
EP1609893B1 (de
EP1609893A3 (de
Inventor
Hisaaki Hayashi
Kiwamu Niimi
Yutaka Shinozaki
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
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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 EP1609893A2 publication Critical patent/EP1609893A2/de
Publication of EP1609893A3 publication Critical patent/EP1609893A3/de
Application granted granted Critical
Publication of EP1609893B1 publication Critical patent/EP1609893B1/de
Ceased legal-status Critical Current
Anticipated expiration legal-status Critical

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    • 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
    • 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
    • D01H13/20—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to excessive tension or irregular operation of apparatus

Definitions

  • the present invention relates to an abnormality detecting device for a drafting device of a spinning machine, and more specifically, to an abnormality detecting device for a drafting device of a spinning machine of the type in which the drafting rollers are driven by a plurality of motors.
  • a drafting device used in a spinning machine such as a ring fine spinning machine or a roving machine
  • a drafting device is of a three-line type which consists 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, in order to facilitate draft ratio change, the front bottom roller and the back bottom roller are respectively driven by separate motors, and a device which exhibits a large machine length as a result of an increase in the number of spindles, in which motors are provided at both ends of the machine, the bottom roller being driven from both sides of the machine.
  • the bottom roller is formed as a single line shaft by connecting together a plurality of roller shafts through threaded engagement of male and female screw portions formed at the ends thereof.
  • the screw direction is determined so as to effect fastening.
  • a loosening force is applied to the threaded engagement of the screw portions due to fluctuations in drafting force, etc., resulting in generation of looseness in the screw portions.
  • drafting cannot be performed at a predetermined draft ratio. In this state, the load on the motor is smaller than that during normal spinning. Thus, it is impossible to detect abnormality through detection of motor over-current or motor temperature.
  • the load on the motor may differ depending on the spinning conditions. For example, when the spinning rate is the same, the load on the motor differs between the spinning of cotton fiber and the spinning of synthetic fiber. Further, the load on the motor differs depending on the yarn count. Thus, it is necessary to store the reference values in correspondence with the spinning conditions.
  • the present invention has been made in view of the above problems. It is an object of the present invention to provide an abnormality detecting device for a drafting device of a spinning machine which can detect generation of abnormality in the drafting device during spinning with a simple construction without need for storing a strict reference value.
  • an abnormality detecting device for a drafting device of a spinning machine in which drafting rollers are driven by a plurality of motors.
  • the abnormality detecting device is equipped with a torque detecting means for detecting the load torques of at least two of the plurality of motors, and a judging means which judges there is abnormality when the difference between the load torques of the two motor is deviated from a set range.
  • Fig. 1 is a schematic plan view of a drafting device according to the first embodiment with a top roller omitted
  • Fig. 2 is a plan view, partially in section, of how roller shafts are connected together.
  • a drafting device 11 is of a three-line type construction, comprising a front line, a middle line, and a back line, and is equipped with front bottom rollers 12, middle bottom rollers 13, and back bottom rollers 14 as drafting rollers.
  • the front bottom rollers 12 are supported at predetermined positions with respect to a roller stand (not shown), and the middle bottom rollers 13 and the back bottom rollers 14 are supported through the intermediation of support brackets (not shown) secured in position so as to allow longitudinal positional adjustment with respect to the roller stand.
  • the middle bottom rollers 13 are equipped with an apron (not shown). Further, in correspondence with the bottom rollers 12 through 14, front top, middle top, and back top rollers (none of which are shown) are provided in a well-known construction.
  • Each of the bottom rollers 12 through 14 is divided into two line shafts 12a and 12b, 13a and 13b, and 14a and 14b, and respective two line shafts 12a and 12b, 13a and 13b, 14a and 14b, are arranged coaxially.
  • each of the bottom rollers 12 through 14 is divided at the longitudinal center, and each two line shafts 12a and 12b, 13a and 13b, 14a and 14b, is formed symmetrically.
  • each line shaft is formed by connecting a plurality of roller shafts 15 with each other through threaded engagement of male screw portions 15a and female screw portions 15b formed at the ends thereof.
  • Fig. 2 shows the line shaft 12a of the front bottom roller 12.
  • a pair of line shafts 12a situated on the left-hand side in Fig. 1 are driven by a first front roller driving motor 16a from one end of the machine, and a pair of line shafts 12b situated on the right-hand side in Fig. 1 are driven by a second front roller driving motor 16b from the other end of the machine.
  • the rotation of the first front roller driving motor 16a is transmitted to each line shaft 12a through a gear row (not shown), and the rotation of the second front roller driving motor 16b is transmitted to each line shaft 12b through a gear row (not shown).
  • a pair of line shafts 13a situated on the left-hand side in Fig. 1 are driven by a first middle roller driving motor 17a from one end of the machine, and a pair of line shafts 13b situated on the right-hand side in Fig. 1 are driven by a second middle roller driving motor 17b from the other end of the machine.
  • the rotation of the first middle roller driving motor 17a is transmitted to each line shaft 13a through a gear row (not shown), and the rotation of the second middle roller driving motor 17b is transmitted to each line shaft 13b through a gear row (not shown).
  • a pair of line shafts 14a situated on the left-hand side in Fig. 1 are driven by a first back roller driving motor 18a from one end of the machine, and a pair of line shafts 14b situated on the right-hand side in Fig. 1 are driven by a second back roller driving motor 18b from the other end of the machine.
  • the rotation of the first back roller driving motor 18a is transmitted to each line shaft 14a through a gear row (not shown), and the rotation of the second back roller driving motor 18b is transmitted to each line shaft 14b through a gear row (not shown).
  • variable-speed motors that are drive-controlled through inverters 19a, 19b, 20a, 20b, 21a, and 21b, respectively.
  • the inverters 19a, 19b, 20a, 20b, 21a, and 21b are controlled by a control device 30.
  • Each of the inverters 19a, 19b, 20a, 20b, 21a, and 21b inputs a direct current obtained through conversion of commercial power by an AC/DC converter (not shown), outputting an electric current corresponding to the load to rotate the driving motors 16a, 16b, 17a, 17b, 18a, and 18b at a predetermined RPM.
  • Each of the inverters 19a, 19b, 20a, 20b, 21a, and 21b is equipped with a current sensor SA for detecting the amount of electric current (motor current amount) flowing through each of the driving motors 16a, 16b, 17a, 17b, 18a, and 18b.
  • the amount of electric current supplied to a motor is in proportion to the load torque of the motor, so that the current sensor SA functions as a torque detecting means for indirectly detecting the load torque of the motor.
  • the control device 30 is equipped with a CPU (central processing unit) 31, a ROM 32, a RAM 33, an input device, and an input/output interface (not shown).
  • the control device 30 is electrically connected to the current sensors SA of the inverters 19a, 19b, 20a, 20b, 21a, and 21b.
  • the CPU 31 controls the driving motors 16a, 16b, etc. through the inverters 19a, 19b, etc.
  • the CPU 31 as the judging means obtains the load torque difference between the two front roller driving motors 16a and 16b, the load torque difference between the two middle roller driving motors 17a and 17b, and the load torque difference between the two back roller driving motors 18a and 18b. Then, the CPU 31 makes a judgment as to whether the differences are deviated from a set range or not, and when the differences are deviated therefrom, judges that there is abnormality.
  • the "set range” refers to a value obtained by adding a permissible error to the load torque fluctuation amount attributable to the unevenness in thickness, or the like of the supplied material (roving) , and is previously obtained through test. The set range is not changed according to the spinning yarn count or the fiber type but is set to a common range.
  • the CPU 31 also controls motors (not shown) for driving a lifting drive system and a spindle drive system, and the control device 30 also functions as the control device for the fine spinning machine. When it is determined that there is abnormality, the CPU 31 effects control so as to stop the operation of the fine spinning machine.
  • the ROM 32 stores program data, and various items of data necessary for the execution thereof.
  • the program data includes correspondence data between spinning conditions and rotating speeds, a map, etc.
  • the correspondence data are ones between the spinning conditions, such as various fiber materials, spinning yarn count, and twist number, and the spindle rotating speed during normal operation and the motor rotating speed of a draft drive system and the lifting drive system.
  • the map indicates the relationship between RPM and current supply amount for various winding amounts.
  • the ROM 32 stores the range of supply current amount corresponding to the load torque during normal operation. When, as abnormality in the drafting device 11, looseness is generated in the roller shaft 15 constituting the line shaft 12a, etc., this value is used to make a judgment as to on which side of the line shaft the abnormality has been generated.
  • the RAM 33 temporarily stores data inputted by the input device, computation results obtained by the CPU 31, etc.
  • the input device is used to input the spinning condition data, such as the 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 the fiber material, spinning yarn count, and twist number
  • the rotation of the driving motors 16a, 16b, 17a, 17b, 18a, and 18b is controlled through the inverters 19a, 19b, 20a, 20b, 21a, and 21b based on a command from the control device 30 and in conformity with the spinning conditions. Further, the driving motors of the spindle drive system and the lifting drive system are controlled so as to attain a predetermined rotating speed.
  • the roving passes the intervals between the back, middle, and front rollers of the drafting device 11 to be thereby drafted, and is then taken up on a bobbin, which is integrally rotated with the spindle, in a take-up portion (not shown).
  • the amount of electric current supplied to the driving motors 16a, 16b, etc. as detected by the current sensors SA of the inverters 19a, 19b, etc. is inputted to the control device 30.
  • the CPU 31 makes a judgment as to whether or not there is any deviation from the set range of the difference between the amounts of electric current supplied to the two driving motors driving the same drafting rollers, that is, the first and second front roller driving motors 16a and 16b, the first and second middle roller driving motors 17a and 17b, and the first and second back roller driving motors 18a and 18b.
  • an abnormality signal is outputted.
  • operation stop control for the machine is executed, and an informing means, such as a buzzer or an alarm lamp, is driven, whereby the operator is informed of the alarm condition.
  • the amount of electric current supplied to the driving motors 16a, 16b, 17a, 17b, 18a, and 18b is in proportion to the magnitude of the load torque. Further, the load torque of each drafting roller is substantially fixed within a range corresponding to the unevenness in roving thickness unless the spinning material and drafting ratio are changed.
  • the front bottom rollers 12, the middle bottom rollers 13, and the back bottom rollers 14 are divided into two at the longitudinal center, with each being driven by two driving motors.
  • the load torque difference between the two motors driving each category of bottom rollers 12 through 14 for example, the load torque difference between the first front roller driving motor 16a and the second front roller driving motor 16b
  • the load torque difference between the first front roller driving motor 16a and the second front roller driving motor 16b is small and within the set range, with the difference between the amounts of electric current supplied to the two driving motors 16a and 16b being also within the set range.
  • abnormality such as winding of roving around the drafting rollers or gripping of the apron
  • the load torque of the driving motors also increases, with the result that the difference is deviated from the set range.
  • This embodiment differs from the first embodiment in that all the bottom rollers 12 through 14 are each formed of a single line shaft 12c, 13c, 14c, and each of the front bottom roller 12, the middle bottom roller 13, and the back bottom roller 14 is driven from both sides by two motors.
  • the portions that are the same as those of the first embodiment are indicated by the same reference numerals, and a detailed description thereof will be omitted, the description being centered on the differences.
  • the bottom rollers 12 through 14 constituting the drafting device 11 extend parallel to each other between gear boxes 22 and 23.
  • One gear box 22 contains a gear row (drive gearing) (not shown) which transmits to the right and left bottom rollers 12 through 14 the rotation of a driving shaft 26 to which the rotation of a first driving motor 24a is transmitted through a belt transmission mechanism 25.
  • the other gear box 23 also contains a gear row (drive gearing) (not shown) which transmits to the right and left bottom rollers 12 through 14 the rotation of a driving shaft 26 to which the rotation of a second driving motor 24b is transmitted through a belt transmission mechanism 25.
  • the first and second driving motors 24a and 24b are connected to inverters 27a and 27b, and are variable-speed-controlled by the control device 30 through the inverters 27a and 27b.
  • the inverters 27a and 27b input a direct current obtained through conversion of commercial power by an AC/DC converters (none of which are shown), and, in order to rotate the driving motors 24a and 24b at a predetermined RPM, supply an electric current corresponding to the load to the driving motors 24a and 24b.
  • the inverters 27a and 27b are equipped with current sensors SA as the torque detecting means for detecting the amounts of electric current supplied to the driving motors 24a and 24b.
  • the load torques acting the two driving motors 24a and 24b are indirectly detected by the current sensors SA.
  • the loads acting on the two driving motors 24a and 24b are equivalent to each other, and the load torque difference is within a set range.
  • the values of the load torques acting on the first and second driving motors 24a and 24b differ according to the difference in the distance between the position of occurrence of the abnormality and the drafting roller end.
  • the CPU 31 constantly monitors to check whether the load torque difference is deviated from the set range or not based on the output signals from the current sensors SA of the inverters 27a and 27b. When the load torque difference is deviated, it is determined that there is abnormality, and an abnormality signal is outputted. Based on the abnormality signal, operation stop control is executed on the machine, and an informing means is driven to inform the operator of an alarm condition.
  • this embodiment provides the following effects:
  • the first embodiment it is possible not to store the range of supply current amount corresponding to the load torque for normal operation, and to omit the judgment as to whether the load torque is smaller than the value during normal operation or not. In this case also, generation of abnormality can be accurately detected.
  • the dividing position is not restricted to the center.
  • a load torque in proportion to the lengths of the line shafts and the number of spindles is applied to each of the two motors driving the drafting rollers, so that there is a difference in the load torques between the two motors in the normal state.
  • an electric current amount detecting means for detecting the amount of electric current supplied to the driving motors 16a, 16b, etc. it is possible to use, instead of the current sensors SA, which directly detect electric current amount, sensors detecting a voltage corresponding to the electric current amount.
  • the torque detecting means for detecting the load torque acting on the driving motors 16a, 16b, etc. it is also possible toprovide, instead of the construction in which the amount of electric current supplied to the driving motors 16a, 16b, etc. is detected, a torque detecting means for detecting a change in torque in the rotating portions between the output shafts of the driving motors 16a, 16b, etc. and the side end portions of the drafting roller driving motors.
  • a torque converter or the like is used as the torque detecting means. The torque converter converts torque to an electric signal (e.g., voltage).
  • strain gauges to the ends of the drafting rollers on the driving motors 16a, 16b side to detect the load torques of the drafting rollers.
  • the portions of detection are the rotating portions from the driving motor side end portions of the drafting rollers to the output shafts of the driving motors, it is possible to reliably detect the loads on the drafting rollers.
  • the means for monitoring the difference between the load torques acting on the driving motors 16a, 16b, etc. and judging that there is abnormality when the difference between the load torques is deviated from the set range is not restricted to the construction using the CPU 31.
  • a comparator in making a judgment as to whether the difference between the load torques acting on the driving motors 16a, 16b, etc. is deviated from the set range or not.
  • the present invention is not restricted to the construction in which the set range for use in the comparison with the difference between the load torques acting on the driving motors 16a, 16b, etc. is previously stored as data in the ROM 32, etc. of the control device 30; it is also possible to store the same in the RAM 33 by the input device.
  • the present invention is not restricted to the construction in which the bottom rollers 12 through 14 are driven from both sides of the machine by the driving motors 16a, 16b, etc., respectively; it is also possible to drive part of the bottom rollers (for example, the middle bottom rollers 13) from both sides of the machine, driving the remaining bottom rollers from one side of the machine.
  • control device 30 instead of immediately stopping the operation of the spinning machine by the control device 30, upon output of an abnormality detection signal from the abnormality detecting device, it is also possible to perform control so as to stop the operation of the spinning machine at the point when the abnormality detection signal has continued for a predetermined period of time. In this case, when the load torque abnormality is of a transient nature, there is no need to stop or re-start the machine.
  • the drafting device 11 is not restricted to the three-line type; it may also be a device having four or more drafting rollers on one side.
  • the present invention is not restricted to a ring fine spinning machine.
  • the present invention may be applied to other spinning machines such as a ring fine spinning machine which spins a spun yarn directly without making a roving by drafting a sliver, a binding spinner, or a roving machine.
  • the judgment means identifies a drafting roller in which abnormality has been generated based on the actual difference between the load torques of the two motors and on the difference between the load torques of the motors with respect to the load torque thereof in the normal state.
  • the judgment means when making an abnormality judgment from the difference between the load torques of the two motors, the judgment means makes a judgment as to the load torque of which motor is deviated from the normal value based on the difference between the load torque of each motor in the normal state, whereby it is possible to identify more accurately the drafting roller in which abnormality has been generated.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
EP20050011192 2004-06-18 2005-05-24 Spinnmaschine mit Vorrichtung zum Nachweis eines abnormalen Zustandes in einem Streckwerk Ceased EP1609893B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2004181567 2004-06-18
JP2004181567A JP2006002300A (ja) 2004-06-18 2004-06-18 紡機におけるドラフト装置の異常検出装置

Publications (3)

Publication Number Publication Date
EP1609893A2 true EP1609893A2 (de) 2005-12-28
EP1609893A3 EP1609893A3 (de) 2006-06-14
EP1609893B1 EP1609893B1 (de) 2008-12-03

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EP20050011192 Ceased EP1609893B1 (de) 2004-06-18 2005-05-24 Spinnmaschine mit Vorrichtung zum Nachweis eines abnormalen Zustandes in einem Streckwerk

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EP (1) EP1609893B1 (de)
JP (1) JP2006002300A (de)
CN (1) CN100443644C (de)
DE (1) DE602005011360D1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITBS20110166A1 (it) * 2011-11-30 2013-05-31 Marzoli Spa Apparato di movimentazione per la cilindrata di un filatoio
EP2759623A4 (de) * 2011-09-22 2016-06-22 Murata Machinery Ltd Spinnmaschine, aufnahmevorrichtung, und textilmaschine
EP3153609A1 (de) * 2015-10-05 2017-04-12 Hanning Elektro-Werke GmbH & Co. KG Antriebsanordnung für eine textilmaschine
EP3599299A1 (de) * 2018-07-23 2020-01-29 Murata Machinery, Ltd. Lastüberwachungssystem, streckvorrichtung, spinneinheit und spinnmaschine

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CN103104797A (zh) * 2012-12-11 2013-05-15 吴江兰瑞特纺织品有限公司 一种纺织机械防夹装置
JP5853994B2 (ja) * 2013-05-30 2016-02-09 株式会社豊田自動織機 コーマ
JP6323328B2 (ja) * 2014-12-18 2018-05-16 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
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
JP7257099B2 (ja) * 2017-09-04 2023-04-13 株式会社豊田自動織機 紡機におけるドラフト装置
CN109974910B (zh) * 2017-12-27 2021-01-26 纳思达股份有限公司 扭矩检测方法及装置
CN108251928B (zh) * 2018-01-23 2019-12-03 苏州元联科技创业园管理有限公司 一种用于针纺织品的加捻装置
JP2019148039A (ja) * 2018-02-28 2019-09-05 村田機械株式会社 ドラフト装置及び紡績ユニット
CN109295571A (zh) * 2018-11-20 2019-02-01 宁夏如意科技时尚产业有限公司 罗拉速度监控报警系统
DE102020106278A1 (de) * 2020-03-09 2021-09-09 Saurer Spinning Solutions Gmbh & Co. Kg Vorrichtung zur Drehmomentübertragung

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EP1314803A2 (de) * 2001-11-26 2003-05-28 Kabushiki Kaisha Toyota Jidoshokki Vorrichtung zur Detektion von Spiel zwischen Streckwerkrollen einer Spinnmaschine

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2759623A4 (de) * 2011-09-22 2016-06-22 Murata Machinery Ltd Spinnmaschine, aufnahmevorrichtung, und textilmaschine
ITBS20110166A1 (it) * 2011-11-30 2013-05-31 Marzoli Spa Apparato di movimentazione per la cilindrata di un filatoio
EP2599904A1 (de) * 2011-11-30 2013-06-05 Marzoli S.P.A. Bewegungsvorrichtung für die Streckzylinder einer Spinnmaschine
CN103132183A (zh) * 2011-11-30 2013-06-05 马佐里有限公司 纺纱机
CN103132183B (zh) * 2011-11-30 2017-06-09 马佐里有限公司 纺纱机
EP3153609A1 (de) * 2015-10-05 2017-04-12 Hanning Elektro-Werke GmbH & Co. KG Antriebsanordnung für eine textilmaschine
EP3599299A1 (de) * 2018-07-23 2020-01-29 Murata Machinery, Ltd. Lastüberwachungssystem, streckvorrichtung, spinneinheit und spinnmaschine
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

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Publication number Publication date
EP1609893B1 (de) 2008-12-03
CN100443644C (zh) 2008-12-17
JP2006002300A (ja) 2006-01-05
EP1609893A3 (de) 2006-06-14
DE602005011360D1 (de) 2009-01-15
CN1710166A (zh) 2005-12-21

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