EP1310587A2 - Verfahren zur Steuerung des Schussfadenrückzuges - Google Patents

Verfahren zur Steuerung des Schussfadenrückzuges Download PDF

Info

Publication number
EP1310587A2
EP1310587A2 EP02013834A EP02013834A EP1310587A2 EP 1310587 A2 EP1310587 A2 EP 1310587A2 EP 02013834 A EP02013834 A EP 02013834A EP 02013834 A EP02013834 A EP 02013834A EP 1310587 A2 EP1310587 A2 EP 1310587A2
Authority
EP
European Patent Office
Prior art keywords
weft
fluid
jet loom
pullback
picking
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Withdrawn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
EP02013834A
Other languages
English (en)
French (fr)
Other versions
EP1310587A3 (de
Inventor
Tomokazu Ishita
Kenji c/o Asahi-Schwebel Co. Ltd. Kiyohara
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.)
Tsudakoma Corp
Asahi Schwebel Co Ltd
Original Assignee
Asahi Schwebel Co Ltd
Tsudakoma Industrial Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Asahi Schwebel Co Ltd, Tsudakoma Industrial Co Ltd filed Critical Asahi Schwebel Co Ltd
Publication of EP1310587A2 publication Critical patent/EP1310587A2/de
Publication of EP1310587A3 publication Critical patent/EP1310587A3/de
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/34—Handling the weft between bulk storage and weft-inserting means

Definitions

  • the present invention relates to a weft pullback control method of controlling a weft pullback device disposed between a weft storage device for storing a weft unwound from a yarn package and a picking nozzle to pull back the weft delivered from the picking nozzle.
  • a fluid-jet loom disclosed in JP-U No. 79778/1994 is provided with a weft pullback device disposed between a weft storage device and a picking nozzle.
  • the weft pullback device is provided with fixed yarn guides and a movable yarn guide that operate cooperatively to pull back a weft by bending a part, extending between the weft storage device and the picking nozzle, of the weft after the completion of a picking operation so that the weft may not extend excessively from the tip of the picking nozzle toward a fabric on the fluid-jet loom and the next picking operation may be stabilized.
  • a weft pullback operation is continued not only while the fluid-jet loom is in operation, but also while the fluid-jet loom is stopped.
  • a weft having a large unit weight, such as a glass yarn is picked, the weft forms a large balloon between the weft storage device and the picking nozzle as shown in Fig. 1, and the next picking operation is started before the balloon of the weft disappears completely even if the weft is pulled back after the preceding picking operation because a high centrifugal force acts on the balloon.
  • the balloon disappears completely when the fluid-jet loom is stopped.
  • a weft pullback control method of controlling a weft pullback device included in a fluid-jet loom having a weft storage device for storing a length of a weft unwound from a yarn package, and a picking nozzle, disposed between the weft storage device and the picking nozzle to pull back a leading end part of the weft extending between the weft storage device and the picking nozzle after the completion of a picking operation includes making the weft pullback device pull back the weft by a length greater than that by which the weft is pulled back while the fluid-jet loom is in operation, at least in a particular period in a period between the stoppage of the fluid-jet loom and the start of the first picking operation after the restart of the fluid-jet loom.
  • the "particular period” is (1) the entire period between the stoppage of the fluid-jet loom and the start of the first picking operation after the restart of the fluid-jet loom, (2) the entire period of stoppage of the fluid-jet loom, (3) at least a period of a shedding motion during the inching operation of the fluid-jet loom, (4) a period immediately before the start of the picking operation, (5) a desired period or (6) a period including some of the periods (1) to (5).
  • the fluid-jet loom may include a weft storage device, a picking nozzle, and a plurality of weft pullback devices disposed between the weft storage device and the picking nozzle. At least one of the plurality of weft pullback devices is operated both while the fluid-jet loom is in operation and while the fluid-jet loom is stopped, and at least one of the plurality of weft pullback devices is operated only while the fluid-jet loom is stopped.
  • the length of the weft pulled back at least in the particular period in the period between the stoppage of the fluid-jet loom and the start of the first picking operation after the restart of the fluid-jet loom is greater than the length by which the weft is pulled back after the picking operation while the fluid-jet loom is in operation.
  • Figs. 1 and 2 show a principal part of a picking system included in a fluid-jet loom 1.
  • the picking system includes a weft storage device 2 including a rotary yarn guide 7, a holding pin 8 and a storage drum 9, a picking nozzle 3 and a weft pullback device 4.
  • a weft 5 pulled out from a yarn package 6 is passed through the rotary yarn guide 7.
  • a part of the weft 5 is held on the storage drum 9 by the holding pin 8, and the rotary yarn guide 7 rotates to wind the weft 5 around the storage drum 9.
  • the weft 5 thus stored on the storage drum 9 is picked by a picking operation of the picking nozzle 3.
  • the holding pin 8 is advanced toward and retracted away from the storage drum 9 by an actuator 10.
  • the weft 5 is extended via the weft pullback device 4 into the picking nozzle 3.
  • the weft pullback device 4 is disposed between the weft storage device 2 and the picking nozzle 3 to pull back the weft 5 extending through the picking nozzle 3.
  • the weft pullback device 4 includes two fixed yarn guides 11 and 12, a movable yarn guide 13 supported on an arm so as to be movable in a space between the fixed yarn guides 11 and 12, a rotary actuator 14 for turning the arm supporting the movable yarn guide 13 to move the movable yarn guide 13, and a pullback controller 15.
  • the fixed yarn guides 11 and 12 are fixedly supported on a frame, not shown.
  • the arm has one end supporting the movable yarn guide 13 and the other end connected to the shaft of the rotary actuator 14.
  • the actuator 14 turns the arm supporting the movable yarn guide 13 counterclockwise, as viewed in Figs. 1 and 2, to increase the length of a part, extending between the fixed yarn guides 11 and 12, of the weft 5 so that a part, extending through the picking nozzle 3, of the weft 5 is pulled back.
  • the pullback controller 15 controls the actuator 14.
  • the pullback controller 15 receives an operation signal S1 and a timing signal S3 from a loom controller 16. While the fluid-jet loom 1 is in operation, the actuator 14 turns the arm counterclockwise, as viewed in Fig. 1, in a period between the cutting of the picked weft 5 by a yarn cutter 22 after a picking operation and time immediately before the next picking operation to move the movable yarn guide 13 away from the two fixed yarn guides 11 and 12, so that a predetermined length of a leading end part of the weft 5 extending through the picking nozzle 3 is pulled back.
  • the loom controller 16 gives a stop signal S2 and the timing signal S3 to the pullback controller 15 to operate the actuator 14 for a pullback operation to pull back the leading end part of the weft 5 by a predetermined length to prevent the leading end part of the weft 5 from being woven into a fabric 24 on the fluid-jet loom 1.
  • the loom controller 16 measures the angular position of a main shaft 18 included in the fluid-jet loom 1, gives the timing signal S3 to the pullback controller 16, and executes control operations necessary for the operation of the fluid-jet loom 1. Configuration of the pullback controller 15 is shown in Fig. 4.
  • the leading end part, extending from the tip of the picking nozzle 3, of the weft 5 is liable to be accidentally woven into the fabric 24 during a repairing operation while the fluid-jet loom 1 is stopped or to be entwined with the yarn cutter 22 or warps 23 to form defects in the fabric 24.
  • the pullback controller 15 carries out a weft pullback control method in a preferred embodiment according to the present invention.
  • the weft pullback control method operates the weft pullback device 4 at least in a particular period in a period between the stoppage of the fluid-jet loom 1 and the start of the first picking operation after the restart of the fluid-jet loom 1 to pull back the weft 5 by a length greater than that by which the weft 5 is pulled back while the fluid-jet loom 1 is in operation.
  • the leading end part of the weft 5 extending between the weft storage device 2 and the picking nozzle 3 is prevented from being drawn out of the picking nozzle 3 by a length corresponding to a slack in the leading end part of the weft 5 produced when the balloon disappears toward the fabric 24 by a slight force exerted thereon by the fluid being continuously jetted through the picking nozzle 3.
  • the leading end part of the weft 5 does not project excessively from the tip of the picking nozzle 3 in the particular period in the period between the stoppage of the fluid-jet loom 1 and the start of the first picking operation after the restart of the fluid-jet loom 1, and hence the leading end part of the weft 5 is not woven accidentally into the fabric 24 and is not entwined with the yarn cutter 22 and the warps 23.
  • the particular period is (1) the entire period between the stoppage of the fluid-jet loom 1 and the start of the first picking operation after the restart of the fluid-jet loom 1, (2) the entire period of stoppage of the fluid-jet loom 1, (3) at least a period of a shedding motion during the inching operation of the fluid-jet loom 1, (4) a period immediately before the start of the picking operation, (5) a desired period or (6) a period including some of the periods (1) to (5).
  • the weft pullback controller 15 includes a control condition setting unit 19, a pullback control unit 20 and a drive unit 21.
  • the control condition setting unit 19 is operated to specify pullback control conditions including a length of the weft to be pulled back while the fluid-jet loom 1 is in operation for the type of the weft, a length of the weft to be pulled back while the fluid-jet loom 1 is stopped for the type of the weft, angular positions of the main shaft 18 respectively for the start and end of pullback, and angular positions of the main shaft 18 respectively for start and end of the particular period in a state where the fluid-jet loom 1 is stopped.
  • the specified pullback control conditions are stored in a storage device included in the pullback control unit 20.
  • the pullback control unit 20 While the fluid-jet loom 1 is in operation, the pullback control unit 20 detects the angular position of the main shaft 18 from the timing signal S3, controls the driving unit 21 for a specified pullback period so that the arm supporting the movable yarn guide 13 is turned counterclockwise, as viewed in Fig. 4, to pull back the leading end part of the weft 5 from the picking nozzle 3.
  • the pullback control unit 20 controls the driving unit 21 to make the weft pullback device 4 pull back the leading end part of the weft by a length greater than that by which the weft is pulled back while the fluid-jet loom is in operation, in the predetermined particular period.
  • the weft pullback device 4 pulls back a length of the leading end part of the weft 5 greater by a length corresponding to a slack in the leading end part of the weft 5 resulting from the disappearance of the balloon than that of the weft to be pulled back while the fluid-jet loom is in operation. Consequently, the leading end part of the weft 5 extending between the weft storage device 2 and the picking nozzle 3 is prevented from being drawn out of the picking nozzle 3 by a slight force exerted thereon by the fluid being continuously jetted through the picking nozzle 3.
  • the leading end part of the weft 5 does not project excessively from the tip of the picking nozzle 3 and hence the leading end part of the weft 5 is not woven accidentally into the fabric 24 and is not entwined with the yarn cutter 22 and the warps 23.
  • Fig. 5 shows a fluid-jet loom 1 similar to that shown in Fig. 1, except that the fluid-jet loom shown in Fig. 5 is provided with two weft pullback devices 4a and 4b interposed between a weft storage device 2 and a picking nozzle 3.
  • At least one of the weft pullback devices 4a and 4b operates to pull back a fixed length of a weft 5 both while the fluid-jet loom 1 is in operation and while the fluid-jet loom 1 is stopped, and at least the other weft pullback device, for example, the weft pullback device 4b disposed near the weft storage device 2, operates to pull back a fixed length of the weft 5 only while the fluid-jet loom 1 is stopped.
  • the positions of the weft pullback devices 4a and 4b may be interchanged.
  • the fluid-jet loom 1 described above by way of example is provided with a rotary actuator 14, the fluid-jet loom 1 may be provided with a linear actuator instead of the rotary actuator 14.
  • the fluid-jet loom does not need to be provided with one or two weft pullback devices, but may be provided with three or more weft pullback devices.
  • the number of the weft pullback devices is determined taking into consideration the length of the weft to be pulled back.
  • the fluid-jet loom is a multiple-color loom provided with a plurality of picking nozzles and a plurality of weft storage devices respectively for storing and picking different wefts
  • a plurality of weft pullback devices are used in combination with the picking nozzles respectively for picking the different wefts, respectively.
  • the weft pullback control method of controlling the weft pullback device included in the fluid-jet loom makes the weft pullback device pull back the weft by a length greater than that by which the weft is pulled back while the fluid-jet loom is in operation, at least in a particular period in a period between the stoppage of the fluid-jet loom and the start of the first picking operation after the restart of the fluid-jet loom.
  • the weft pullback device pulls back a length of the leading end part of the weft greater by a length corresponding to a slack in the leading end part of the weft resulting from the disappearance of the balloon than that of the weft to be pulled back while the fluid-jet loom is in operation. Consequently, the leading end part of the weft extending between the weft storage device and the picking nozzle is prevented from being drawn out of the picking nozzle.
  • the leading end part of the weft does not project excessively from the tip of the picking nozzle and hence the leading end part of the weft is not woven accidentally into the fabric and is not entwined with matters around the weft during a setting operation before restarting the fluid-jet loom, so that formation of defects in the fabric can be avoided.
  • the fluid-jet loom When the fluid-jet loom is provided with a plurality of weft pullback devices, at least one of the weft pullback devices operates to pull back a fixed length of a weft both while the fluid-jet loom is in operation and while the fluid-jet loom 1 is stopped, and at least the other weft pullback device operates to pull back a fixed length of the weft only while the fluid-jet loom is stopped.
  • the leading end part of the weft can be pulled back properly both while the fluid-jet loom is in operation and while the same is stopped.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP02013834A 2001-07-11 2002-06-21 Verfahren zur Steuerung des Schussfadenrückzuges Withdrawn EP1310587A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2001210297A JP3654350B2 (ja) 2001-07-11 2001-07-11 緯糸引き戻し制御方法
JP2001210297 2001-07-11

Publications (2)

Publication Number Publication Date
EP1310587A2 true EP1310587A2 (de) 2003-05-14
EP1310587A3 EP1310587A3 (de) 2003-09-17

Family

ID=19045792

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02013834A Withdrawn EP1310587A3 (de) 2001-07-11 2002-06-21 Verfahren zur Steuerung des Schussfadenrückzuges

Country Status (3)

Country Link
EP (1) EP1310587A3 (de)
JP (1) JP3654350B2 (de)
CN (1) CN1283862C (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1741817A1 (de) * 2005-07-07 2007-01-10 L.G.L. Electronics S.p.A. Faden-Rückzugsvorrichtung für Textilmaschinen
WO2018009119A1 (en) * 2016-07-06 2018-01-11 Iro Aktiebolag Weft yarn feeding device forming an intermediate yarn buffer and a method for controlling a weft yarn feeding device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101054757B (zh) * 2007-05-15 2011-04-20 江苏万工科技集团有限公司 喷气织机的选纬装置
JP5163301B2 (ja) * 2008-06-10 2013-03-13 株式会社豊田自動織機 流体噴射式織機における緯糸引戻し装置の操作方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4481982A (en) * 1982-08-04 1984-11-13 Nissan Motor Company, Limited Weft pull-back device of a jet weaving loom
JPH02160950A (ja) * 1988-12-15 1990-06-20 Nissan Motor Co Ltd 織機の緯糸引き戻し装置
EP0467059A1 (de) * 1990-06-11 1992-01-22 NUOVA VAMATEX S.p.A. Vorrichtung zur Spannungsregulierung und Rückziehen von Schussgarn in Webmaschinen
US5564473A (en) * 1994-05-30 1996-10-15 Sulzer Managment Ag Apparatus and method for correcting irregularities in a series shed weaving machine
US5590692A (en) * 1994-10-29 1997-01-07 Lindauer Dornier Gesellschaft Mbh Method for avoiding fabric faults during transitional loom operating conditions

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4481982A (en) * 1982-08-04 1984-11-13 Nissan Motor Company, Limited Weft pull-back device of a jet weaving loom
JPH02160950A (ja) * 1988-12-15 1990-06-20 Nissan Motor Co Ltd 織機の緯糸引き戻し装置
EP0467059A1 (de) * 1990-06-11 1992-01-22 NUOVA VAMATEX S.p.A. Vorrichtung zur Spannungsregulierung und Rückziehen von Schussgarn in Webmaschinen
US5564473A (en) * 1994-05-30 1996-10-15 Sulzer Managment Ag Apparatus and method for correcting irregularities in a series shed weaving machine
US5590692A (en) * 1994-10-29 1997-01-07 Lindauer Dornier Gesellschaft Mbh Method for avoiding fabric faults during transitional loom operating conditions

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 014, no. 423 (C-0757), 12 September 1990 (1990-09-12) & JP 02 160950 A (NISSAN MOTOR CO LTD), 20 June 1990 (1990-06-20) *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1741817A1 (de) * 2005-07-07 2007-01-10 L.G.L. Electronics S.p.A. Faden-Rückzugsvorrichtung für Textilmaschinen
WO2018009119A1 (en) * 2016-07-06 2018-01-11 Iro Aktiebolag Weft yarn feeding device forming an intermediate yarn buffer and a method for controlling a weft yarn feeding device

Also Published As

Publication number Publication date
JP2003020544A (ja) 2003-01-24
CN1396324A (zh) 2003-02-12
CN1283862C (zh) 2006-11-08
EP1310587A3 (de) 2003-09-17
JP3654350B2 (ja) 2005-06-02

Similar Documents

Publication Publication Date Title
US4619294A (en) Method of and apparatus for controlling motor-driven let-off and take-up system for looms
JPS5966540A (ja) 無杼織機における緯糸欠点織込み防止方法
EP1310587A2 (de) Verfahren zur Steuerung des Schussfadenrückzuges
US5335698A (en) Method of restarting a loom after stoppage
JP4573513B2 (ja) 織機の停止段防止方法
JP2611702B2 (ja) ジェットルームにおける起動方法
JPH059838A (ja) ジエツトルームにおける製織方法
JP3132071B2 (ja) 織機における織段発生防止装置
JP2565006B2 (ja) ジェットルームにおける１ショット緯入れ方法
JP3674108B2 (ja) 織機における表示装置
JP2906731B2 (ja) ジェットルームにおける１ショット緯入れ方法
JP4057089B2 (ja) 織機における織段発生防止方法及び装置
JP2006161236A (ja) パイル経糸張力の調整方法
JP3134331B2 (ja) ジェットルームにおける１ショット緯入れ方法
JP2611696B2 (ja) ジェットルームにおける織段発生防止方法
JP2622708B2 (ja) 織機の運転方法
JP2005273076A (ja) 織機のスタート制御装置およびスタート制御方法
US5161582A (en) One pick weft inserting method and control system for jet loom start-up
JP3148431B2 (ja) 不良糸除去方法
JPH0210253B2 (de)
JP2715089B2 (ja) 織機の運転方法およびその装置
JP2001020156A (ja) 流体噴射式織機における緯糸引戻し装置の操作方法
JPH05179540A (ja) 織機の織前位置調整方法
JPH07189083A (ja) 織機における不良緯糸処理方法およびその処理装置
JPH09195146A (ja) 織機の再起動方法

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

17P Request for examination filed

Effective date: 20031203

AKX Designation fees paid

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20070103