EP1101852A1 - Méthode de contrôle de la tension de la chaíne - Google Patents

Méthode de contrôle de la tension de la chaíne Download PDF

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Publication number
EP1101852A1
EP1101852A1 EP00123397A EP00123397A EP1101852A1 EP 1101852 A1 EP1101852 A1 EP 1101852A1 EP 00123397 A EP00123397 A EP 00123397A EP 00123397 A EP00123397 A EP 00123397A EP 1101852 A1 EP1101852 A1 EP 1101852A1
Authority
EP
European Patent Office
Prior art keywords
warp
tension
roll
crossing
dedicated
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
EP00123397A
Other languages
German (de)
English (en)
Other versions
EP1101852B1 (fr
Inventor
Zenji Tamura
Kenjiro Oono
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
Original Assignee
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 Tsudakoma Industrial Co Ltd filed Critical Tsudakoma Industrial Co Ltd
Publication of EP1101852A1 publication Critical patent/EP1101852A1/fr
Application granted granted Critical
Publication of EP1101852B1 publication Critical patent/EP1101852B1/fr
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Expired - Lifetime legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D49/00—Details or constructional features not specially adapted for looms of a particular type
    • D03D49/04—Control of the tension in warp or cloth
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D49/00—Details or constructional features not specially adapted for looms of a particular type
    • D03D49/04—Control of the tension in warp or cloth
    • D03D49/12—Controlling warp tension by means other than let-off mechanisms

Definitions

  • the present invention relates to a method for controlling the tension of a warp for production of textiles, such as satin stripe textiles, fine pattern textiles, and textiles dotted with small patterns, partially with a different textile texture in the width direction of the textile, that is, with the number of crossing of the warp with respect to the weft smaller in a part compared with the other part. More specifically, it relates to a method for controlling the tension of a warp in the part with a small number of crossing, that is, of a warp corresponding to the part of the textile with the small number of crossing.
  • the weaving ratio length of the consumed warps per a unit textile length
  • the weaving ratio is smaller in the textile texture with a small number of crossing, so that the warp in the part tends to be loosened on the warp line. Therefore, shedding failure is generated so that the weft is caught by the warp during the picking of the weft, and thus a problem of the weft picking failure arises.
  • a first aspect of the invention is a method for controlling the tension of a warp with a warp tension controlling apparatus for production of a textile with the number of crossing of the warp with respect to the weft smaller in a part compared with the other part of the textile in the width direction, wherein a warp corresponding to the part with a small number of crossing (hereinafter referred to simply as a "warp with a small number of crossing”) and a warp corresponding to the other part with a large number of crossing (hereinafter referred to simply as a "warp with a large number of crossing”) are drawn out from a warp beam and are placed on different rolls, the roll dedicated to the warp with the small number of crossing is movably provided in the direction crossing with the axis of the roll, and wherein the method comprises the steps of: temporarily reducing the tension of the warp with the small number of crossing via the dedicated roll immediately before beating; increasing the tension of the warp with the small number of crossing via the dedicated roll after beating
  • the correction can be executed based thereon.
  • the position of the dedicated roll is detected, the deviation with respect to the target position is calculated, and at least one of the degree of reducing the tension of the warp with the small number of crossing immediately before beating and the target tension value to be used for the tension control after beating is corrected so as to decrease the deviation.
  • the degree of reducing the tension of the warp is reduced or the target tension value is increased.
  • the tension of the warp with the small number of crossing is controlled so as to be higher immediately before beating so that the loosening amount of the warp to be transmitted to the cloth fell with the beating operation is reduced, and as a result, the weaving ratio of the warp with the small number of crossing is lowered.
  • the above-mentioned operation is repeated until the deviation is offset, so that the weaving ratio of the warp with the small number of crossing is finally equal to that of the warp with the large number of crossing.
  • the tension of the warp with the small number of crossing becomes small immediately before subsequent beating so that the loosening amount of the warp to be transmitted to the cloth fell with the beating operation is increased, and as a result, the weaving ratio of the warp with the small number of crossing is increased.
  • the correcting operation is repeated until the deviation is offset so that the weaving ratio of the warp with the small number of crossing can finally be equal to that of the warp with the large number of crossing.
  • the swing roll 6 as the subject for control is supported rotatably at the tip end of an arm 14 so as to be moved forward or backward according to swinging of the arm 14 in the front and back direction.
  • the arm 14 is interlocked with an output shaft 16 of a servo motor 15 for controlling the swing roll 6.
  • the servo motor 15 is controlled by a control device 17 so as to temporarily reduce the tension of the warp 3 immediately before beating and increase the tension of the warp 3 after beating for regaining the target tension value, in one cycle of the weaving machine (one rotation of the main shaft 18 of the weaving machine).
  • the tension control unit 24 also comprises an integrator (not shown) for inputting the correction amount signal from the correction device 20 to the integrator, and outputs to the servo controller 27 the current value corresponding to the target tension value after correction obtained by adding the output from the integrator (integration amount of the correction amount) to the output (target tension value) from the setting unit 26 as the command signal.
  • FIG. 3 shows a specific embodiment of the correction device 20.
  • a detection signal from the position sensor 21 is amplified by an amplifier 29 so as to be inputted into a roll position calculator 30.
  • the roll position calculator 30 inputs a detection signal from the position sensor 21 each time a sampling signal is inputted so as to store the detected position, finds the average value of the stored detected positions per one cycle of the weaving machine from a signal showing a zero rotation angle, and sends this out to a comparator 31.
  • the comparator 31 compares the average value and a target position preset in a setting unit 32 for finding the deviation, and inputs a signal corresponding to the positional deviation to a correction amount calculator 33.
  • the correction amount calculator 33 calculates the correction amount for the rotation amount of the servo motor 15 for advancing the swing roll 6 according to the deviation and the correction amount for the target tension value preset in the setting unit 26 each time the deviation is inputted, so that the former correction amount is outputted to the position control unit 23 and the latter correction amount is outputted to the tension control unit 24.
  • FIG. 4 shows the position control period and the tension control period in one cycle of the weaving machine.
  • the position control period including the beating point is for example, set in the period with a 270 to 20 degree rotation angle of the main shaft 18.
  • the tension control period including the maximum shedding point is for example, set in the period with a 20 to 270 degree rotation angle.
  • the position control unit 23 increases the output rotation amount to the servo controller 27, consequently the advancing amount of the swing roll 6 is increased so that the degree of reducing the tension of the warp is larger in the position control period, and thus the tension of the warp 3 immediately before beating is still lower so as to increase the weaving ratio of the warp 3.
  • the control for reducing the warp tension immediately before beating can be executed by the tension control unit 24.
  • the tension control unit 24 is provided as shown in FIG. 5.
  • a predetermined value for subtraction of the target tension value for reducing the tension of the warp 3 immediately before beating is inputted in a setting unit 53.
  • the position control unit 23 and the setting unit 25 of the control device 17 can be eliminated.
  • a gate circuit 52 is driven to open the gate in a 270 to 20 degree rotation angle by the timing signal input.
  • the predetermined value on the setting unit 53 side is outputted as the subtraction value for the target tension value from the setting unit 26 side, more specifically, for the target tension value after correction obtained by adding the output from an integrator 50 to the target tension value set in the setting unit 26.
  • the tension control unit 24 outputs a command signal based on the final target tension value obtained by subtracting the predetermined value on the setting unit 53 side from the corrected target tension value to a servo controller 72. Accordingly, the torque applied on the swing roll 6 is reduced, and thus the tension of the warp 3 immediately before beating can be reduced as well.
  • the gate circuit 52 is not driven, that is, in a predetermined period after beating (20 to 270 degree rotation angle), the value obtained by adding the output from the integrator 50 to the target tension value preset in the setting unit 26 is regarded as the target tension value after correction, and a command signal corresponding thereto is outputted to the servo controller 72.
  • the correction device 20 finds the deviation of the average value of the position and the target position of the swing roll 6 in one cycle of the weaving machine, and outputs the correction amount corresponding to the deviation to the integrator 50 and the integrator 51. Specifically, a negative correction amount is outputted to the integrator 50 for lowering the target tension value to be the base for the command signal to be outputted to the servo controller 72 in a predetermined period after beating (20 to 270 degree rotation angle), and a positive correction amount is outputted to the integrator 51 for further lowering the target tension value in the other period including the beating period (270 to 20 degree rotation angle).
  • the weaving ratio of the warp 3 can be increased.
  • the correction amount can be outputted only to the integrator 51 without the output to the integrator 50, or the correction amount can be outputted only to the integrator 50 without the output to the integrator 51.
  • the position of the swing roll can be detected at a single set rotation angle in one rotation of the main shaft of a weaving machine, so that the correction is executed based on the deviation of the detected position and the target position per each detection.
  • the position of the swing roll 6 can be detected per predetermined time instead of the rotation angle of the main shaft of a weaving machine.
  • the predetermined time set as a time sufficiently shorter than the time necessary for one rotation of the main shaft, a plurality of positions can be detected during one rotation, so as to find the average value of the detected positions per predetermined rotations (one rotation or a plurality of rotations) of the main shaft.
  • each warp can be drawn out via a roll dedicated to each of them, with the rolls corresponding to the other warps, except the warp corresponding to the part with the largest number of crossing, provided movably, and each roll can be controlled independently according to the above-mentioned embodiment.
  • the weaving ratio of the warp can be equal to the weaving ratio of a warp in a part with a large number of crossing, so that a textile with a good quality can be produced stably.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP20000123397 1999-11-19 2000-10-31 Méthode de contrôle de la tension de la chaíne Expired - Lifetime EP1101852B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP33068399 1999-11-19
JP33068399 1999-11-19
JP2000197743 2000-06-30
JP2000197743A JP3466547B2 (ja) 1999-11-19 2000-06-30 経糸張力制御方法

Publications (2)

Publication Number Publication Date
EP1101852A1 true EP1101852A1 (fr) 2001-05-23
EP1101852B1 EP1101852B1 (fr) 2004-08-04

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP20000123397 Expired - Lifetime EP1101852B1 (fr) 1999-11-19 2000-10-31 Méthode de contrôle de la tension de la chaíne

Country Status (3)

Country Link
EP (1) EP1101852B1 (fr)
JP (1) JP3466547B2 (fr)
DE (1) DE60012664T2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107344448A (zh) * 2016-05-04 2017-11-14 姚加荣 一种印花机

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102901466A (zh) * 2012-10-31 2013-01-30 江南大学 一种基于图像分析的织物纬斜检测方法
CN112030327B (zh) * 2020-09-14 2021-11-16 丹阳市益讯机械有限公司 一种织布机的纱线张力调控装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0424244A (ja) * 1990-05-18 1992-01-28 Tsudakoma Corp サテンストライプ織物などの製織方法
JPH07238443A (ja) * 1994-02-24 1995-09-12 Toray Ind Inc 柄織物の製織方法および柄織物製織用イージング装置
JPH11323699A (ja) * 1998-05-11 1999-11-26 Tsudakoma Corp イージング方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0424244A (ja) * 1990-05-18 1992-01-28 Tsudakoma Corp サテンストライプ織物などの製織方法
JPH07238443A (ja) * 1994-02-24 1995-09-12 Toray Ind Inc 柄織物の製織方法および柄織物製織用イージング装置
JPH11323699A (ja) * 1998-05-11 1999-11-26 Tsudakoma Corp イージング方法
US6070619A (en) * 1998-05-11 2000-06-06 Tsudakoma Kogyo Kabushiki Kaisha Easing roller control method

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 016, no. 183 (C - 0936) 6 May 1992 (1992-05-06) *
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 01 31 January 1996 (1996-01-31) *
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 02 29 February 2000 (2000-02-29) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107344448A (zh) * 2016-05-04 2017-11-14 姚加荣 一种印花机

Also Published As

Publication number Publication date
JP2001207352A (ja) 2001-08-03
JP3466547B2 (ja) 2003-11-10
DE60012664T2 (de) 2005-07-28
EP1101852B1 (fr) 2004-08-04
DE60012664D1 (de) 2004-09-09

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