EP1304406A1 - Dispositif et méthode de commande du mouvement de formation des boucles dans un métier à trames multiples pour tissu éponge - Google Patents

Dispositif et méthode de commande du mouvement de formation des boucles dans un métier à trames multiples pour tissu éponge Download PDF

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Publication number
EP1304406A1
EP1304406A1 EP01830663A EP01830663A EP1304406A1 EP 1304406 A1 EP1304406 A1 EP 1304406A1 EP 01830663 A EP01830663 A EP 01830663A EP 01830663 A EP01830663 A EP 01830663A EP 1304406 A1 EP1304406 A1 EP 1304406A1
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EP
European Patent Office
Prior art keywords
motor
cam
control device
shaft
electric motor
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Withdrawn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
EP01830663A
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German (de)
English (en)
Inventor
Maurizio Belingheri
Riccardo Tomasoni
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.)
Promatech SpA
Original Assignee
Promatech SpA
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 Promatech SpA filed Critical Promatech SpA
Priority to EP01830663A priority Critical patent/EP1304406A1/fr
Publication of EP1304406A1 publication Critical patent/EP1304406A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D39/00—Pile-fabric looms
    • D03D39/22—Terry looms
    • D03D39/223—Cloth control

Definitions

  • the present invention relates to a control device for a terry fabric loom and to the associated control method and, more particularly, to a device for actuating and regulating the motion law of a multiple-weft terry fabric loom.
  • This relative movement can be obtained using two different methods: a first solution which suitably varies the movement of the sley, while a second solution varies the movement of the bench, namely the controlled and co-ordinated displacement of the fabric-tensioning cylinder and the yarn-carrying cylinder.
  • Both the movements are achieved by means of an electromechanical device which receives the motion from the main shaft of the loom (power take-off) and transmits it to the relevant components by means of lever mechanisms, the mutual engagement of which is determined by means of low-power actuators.
  • EP-534,403 and in European Patent Application No. 01104353.6, the contents of which are regarded as included herein explicitly by way of reference for a better understanding of the invention.
  • this kinematic mechanism is normally composed of a gear train which receive the motion from the main shaft of the loom and distribute it to a cam which defines the motion law of the actual actuating device.
  • this kinematic mechanism is difficult and complex and requires direct action on the gears in order to be able to modify their effect.
  • the cam and/or the gear train must be replaced in order to modify the motion law.
  • the object of the present invention is to overcome these limitations and drawbacks, providing a control device which can be easily adjusted and is versatile, as regards the motion law, and which at the same time has small overall dimensions, is constructionally less complex and is therefore advantageously low-cost.
  • the controlling and regulating device manages the mechanical components intended to determine the motion law of the mechanism which controls formation of the terry fabric loop.
  • the invention consists in connecting the shaft of the actuating cam - which has been developed and designed for example for three-weft terry fabric - to an electric motor, directly or via a reducer, by means of which the pausing phase of the cam may be suitably decreased or shortened in order to allow the insertion, correspondingly, of a smaller or greater number of weft yarns between the formation of one loop and the next, thus varying the characteristics of the terry fabric.
  • Fig. 1 shows the configuration of a terry fabric loom in which a regulating and actuating device D according to the present invention is embodied.
  • a main motor M1 controls the movement of the main weaving components (grippers, sley, selvage tying systems, cutter, etc.);
  • a motor M2 forms the drive system for the kinematic mechanism adjusting the height of the loop, which is inserted inside the device D;
  • a motor M3 which drives rotation of a cam 1 able to determine the motion law of the control device D.
  • the operation of the motor M3 is co-ordinated with that of the main motor M1 and is actuated by means of a control unit C which regulates the speed thereof in accordance with what described further below.
  • the motor M3 allows the cam 1 to be actuated no longer in a fixed transmission ratio with respect to the movement of the main motor M1, as occurred in the prior art, but by modifying, as required, the relationship between the angular speed of the cam 1 and the main motor of the loom.
  • control program implemented in the control unit C, it is possible to obtain full control over the virtual axis between the motor M1 and the motor M3, both in order to obtain the desired motion law and as a safeguard of the integrity of the loom and ensure correct operation thereof.
  • the control program maintains perfect synchronism between the cam 1 and the main components of the loom moved by the motor M1, is able to deal with particular and anomalous conditions (stopping of the loom, slow running or manual reverse running, etc.) and take into account the variations in the operating parameters (for example change-over in the weave design).
  • the managed control over insertion of the prebeating-up wefts 1, 2, .... (n-1) is equally important when anomalous conditions exist, such as breakage of the weft or an intended change in the weave design by the operator; these events may occur at any time during operation of the terry fabric loom and not necessarily at the end of the nth beating-up stroke.
  • the program which controls the motor M3, in relation to the motor M1 also monitors operation during the abovementioned intermediate or prebeating-up strokes.
  • the system according to the present invention is able, upon switching on of the loom, to re-synchronize the two said movements so as to be able to start again without any risk of mechanical interference.
  • This is preferably achieved by using angular position transducers of the absolute type.
  • Fig. 2 illustrates in schematic form the device according to the invention during the steps which take place during a complete operating cycle and in the operating mode for a 3-weft terry fabric; with respect to the above hypothesis, in these conditions the cam 1 is rotated at a constant speed.
  • the graph in Fig.3 illustrates the same operation in terms of angular rotation of the shafts, assuming that the loom operates at a speed of 600 picks per minute, namely one pick every 100 ms.
  • the program controlling the virtual axis must simply maintain a constant speed ratio between the main motor M1 of the loom and the motor M3 of the control device.
  • Fig. 4 shows in schematic form the same operation as shown in Fig. 3 during execution of a 4-weft terry fabric cycle.
  • the further step of insertion of another prebeating-up weft may take place.
  • the motor M3 which actuates rotation of the cam 1, decelerates and accelerates again during the pausing phase of the said cam, so as to prolong it and allow the main movement of the loom time to insert an additional weft.
  • the graph of the motion laws is identical to that shown in Fig. 3 solely up to the first pick (100 ms).
  • the movement of the actuating shaft follows the line R3; the speed of the motor M3 (line L3) undergoes a constant deceleration between 100 and 200 ms, and then accelerates again, returning to steady speed (namely the same angular speed as the main shaft) at the third pick (300 ms) and completing rotation of the cam shaft at the fourth pick (400 ms), which thus occurs together with the movement of the bench.
  • the acceleration/deceleration cycle of the motor M3, in this example, is symmetrical with respect to the loop weaving cycle.
  • Fig. 5 shows an operating cycle, again in connection with the example considered above, but with the insertion of five wefts.
  • the interpretation of the graph, in the light of the explanations provided above, should be readily understandable to a person skilled in the art.
  • the control program maintains a point-by-point synchronism between the main shaft and the cam shaft only for a three-weft terry fabric; in all the other cases, where n>3, the control program ensures suitable slowing down and acceleration of the motor M3 during the prebeating-up steps (pausing arc of the cams) and then re-synchronizes the cam actuating shaft with the main shaft at the time of "bellying", namely at the end of each cycle and at the start of the next one.
  • the accelerations/decelerations of the motor M3 take place during the pausing phase of the cams such that the torque peaks required of the motor for movement of the bench occur during parts of the cycle different from those in which the torque peaks required for acceleration and deceleration of the cams occur.
  • the complete rotation is broken down into individual fractions and the control program performs fractional control of the phase angle, so as to ensure correct operation at any speed of the loom.
  • a (M3) f (M1, b, n)
  • M3 control device motor
  • a (M3) angle of the cam actuating shaft
  • M1 main motor of the loom
  • b current number of prebeating-up weft
  • n total number of picks in the terry fabric cycle.
  • the method of operation which is co-ordinated by the control program, is based on recognition of the weft number, in particular the prebeating-up weft number. This allows management of the intermediate weft insertion steps during anomalous conditions. For example, when an electrical black-out occurs, the loom driven by the motor M1 moves forward as a result of inertia, whereas the control device D, operated by the motor M3 stops instantaneously. In this case the control program manages the subsequent start-up of the loom with a preliminary operation involving synchronization of the main shaft and the cam actuating shaft, after verifying the state of the virtual axis M1/M3.
  • the motor M3 does not drive the cam shaft directly, but causes the movement thereof in an indirect manner, so as not to have a power function, but merely an actuating/regulating function, which is advantageous in terms of its cost.
  • the cam shaft A1 receives the motion from the main shaft of the loom by means of an epicyclic train, the operating conditions of which are determined by the regulating motor M3.
  • a toothed pulley 2 receives the constant speed motion from the main motor M1 of the loom by means of a toothed belt (not shown).
  • the pulley 2 is integral with a spider 3 on which the planetary gear block 4 is mounted.
  • the planetary gear block 4 is constructed so as to mesh with a first gearwheel 5 and a second gearwheel 6 which are respectively keyed on a regulating shaft A3 and on the cam shaft A1.
  • the rotation of the gearwheel 5 is controlled, via the shaft A3 and a worm wheel/endless screw pair 7, by the actuating motor M3.
  • the motor M3 In the 3-weft terry fabric mode, the motor M3 is kept locked in position; the pulley 2, the spider 3, the planetary gear 5 and the gearwheel 6 have dimensions such that the transmission ratio between the main shaft of the loom and the shaft A1 is 1:3, again assuming the example considered above.
  • the motor M3 operates at a speed, the progression of which is for example triangular: 0 > Vmax > 0 along the pausing arc of the cam 1.
  • the planetary gear block 4 undergoes a corresponding reduction in the speed of rotation. Consequently, the wheel 6, and also the cam shaft A1 integral therewith, undergo a reduction in speed in accordance with a law determined by the rotation of M3.
  • Operation of the motor M3 occurs whenever there is the need to modify the duration of the pause period compared to the rated period, namely, in the example considered, for insertion of a number of wefts n > 3.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP01830663A 2001-10-19 2001-10-19 Dispositif et méthode de commande du mouvement de formation des boucles dans un métier à trames multiples pour tissu éponge Withdrawn EP1304406A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP01830663A EP1304406A1 (fr) 2001-10-19 2001-10-19 Dispositif et méthode de commande du mouvement de formation des boucles dans un métier à trames multiples pour tissu éponge

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP01830663A EP1304406A1 (fr) 2001-10-19 2001-10-19 Dispositif et méthode de commande du mouvement de formation des boucles dans un métier à trames multiples pour tissu éponge

Publications (1)

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EP1304406A1 true EP1304406A1 (fr) 2003-04-23

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EP01830663A Withdrawn EP1304406A1 (fr) 2001-10-19 2001-10-19 Dispositif et méthode de commande du mouvement de formation des boucles dans un métier à trames multiples pour tissu éponge

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EP (1) EP1304406A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1621654A2 (fr) * 2004-07-28 2006-02-01 Tsudakoma Kogyo Kabushiki Kaisha Système d'entraînement des membres de formation de boucles dans un métier pour tissu éponge du type à toile mobile
EP1657332A2 (fr) * 2004-11-16 2006-05-17 Tsudakoma Kogyo Kabushiki Kaisha Système d'entraînement des membres de formation de boucles dans un métier pour tissu éponge du type à toile mobile
WO2006131323A1 (fr) * 2005-06-10 2006-12-14 Picanol N.V. Metier a tisser les tissus eponge
CN101525801B (zh) * 2009-04-08 2010-12-01 王勇 毛巾机的停送停卷机构

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0534403A1 (fr) * 1991-09-23 1993-03-31 SOMET SOCIETA' MECCANICA TESSILE S.p.A. Dispositif électro-mécanique pour contrôler la formation des boucles dans un métier à tricoter
JPH07102446A (ja) * 1993-10-04 1995-04-18 Toyota Autom Loom Works Ltd パイル織機におけるパイル形成装置
JPH07133550A (ja) * 1993-11-10 1995-05-23 Toyota Autom Loom Works Ltd パイル織機におけるパイル形成装置
JPH07145534A (ja) * 1993-09-29 1995-06-06 Toyota Autom Loom Works Ltd パイル織機におけるパイル形成方法及び装置
JPH10331053A (ja) * 1997-05-30 1998-12-15 Tsudakoma Corp パイル形成装置
EP1132509A1 (fr) * 2000-03-07 2001-09-12 Promatech S.p.A. Procéde et dispositif de commande et de réglage pour former les boucles dans un métier pour tissu éponge

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0534403A1 (fr) * 1991-09-23 1993-03-31 SOMET SOCIETA' MECCANICA TESSILE S.p.A. Dispositif électro-mécanique pour contrôler la formation des boucles dans un métier à tricoter
JPH07145534A (ja) * 1993-09-29 1995-06-06 Toyota Autom Loom Works Ltd パイル織機におけるパイル形成方法及び装置
JPH07102446A (ja) * 1993-10-04 1995-04-18 Toyota Autom Loom Works Ltd パイル織機におけるパイル形成装置
JPH07133550A (ja) * 1993-11-10 1995-05-23 Toyota Autom Loom Works Ltd パイル織機におけるパイル形成装置
JPH10331053A (ja) * 1997-05-30 1998-12-15 Tsudakoma Corp パイル形成装置
EP1132509A1 (fr) * 2000-03-07 2001-09-12 Promatech S.p.A. Procéde et dispositif de commande et de réglage pour former les boucles dans un métier pour tissu éponge

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1995, no. 07 31 August 1995 (1995-08-31) *
PATENT ABSTRACTS OF JAPAN vol. 1995, no. 08 29 September 1995 (1995-09-29) *
PATENT ABSTRACTS OF JAPAN vol. 1995, no. 09 31 October 1995 (1995-10-31) *
PATENT ABSTRACTS OF JAPAN vol. 1999, no. 03 31 March 1999 (1999-03-31) *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1621654A2 (fr) * 2004-07-28 2006-02-01 Tsudakoma Kogyo Kabushiki Kaisha Système d'entraînement des membres de formation de boucles dans un métier pour tissu éponge du type à toile mobile
EP1621654A3 (fr) * 2004-07-28 2007-06-06 Tsudakoma Kogyo Kabushiki Kaisha Système d'entraînement des membres de formation de boucles dans un métier pour tissu éponge du type à toile mobile
EP1657332A2 (fr) * 2004-11-16 2006-05-17 Tsudakoma Kogyo Kabushiki Kaisha Système d'entraînement des membres de formation de boucles dans un métier pour tissu éponge du type à toile mobile
EP1657332A3 (fr) * 2004-11-16 2007-05-30 Tsudakoma Kogyo Kabushiki Kaisha Système d'entraînement des membres de formation de boucles dans un métier pour tissu éponge du type à toile mobile
CN1776054B (zh) * 2004-11-16 2010-08-18 津田驹工业株式会社 布移动式毛圈织机的起毛圈部件的驱动装置
WO2006131323A1 (fr) * 2005-06-10 2006-12-14 Picanol N.V. Metier a tisser les tissus eponge
CN101194058B (zh) * 2005-06-10 2011-01-26 必佳乐有限公司 毛圈织机
CN101525801B (zh) * 2009-04-08 2010-12-01 王勇 毛巾机的停送停卷机构

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