EP1158081B1 - Weaving loom drive, with no flywheel and friction clutch - Google Patents

Weaving loom drive, with no flywheel and friction clutch Download PDF

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Publication number
EP1158081B1
EP1158081B1 EP01112634A EP01112634A EP1158081B1 EP 1158081 B1 EP1158081 B1 EP 1158081B1 EP 01112634 A EP01112634 A EP 01112634A EP 01112634 A EP01112634 A EP 01112634A EP 1158081 B1 EP1158081 B1 EP 1158081B1
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EP
European Patent Office
Prior art keywords
loom
drive unit
gearwheel
clutch
coaxial
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.)
Revoked
Application number
EP01112634A
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German (de)
English (en)
French (fr)
Other versions
EP1158081A1 (en
Inventor
Angelo Gallizioli
Corrado Volpi
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
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Filing date
Publication date
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Application filed by Promatech SpA filed Critical Promatech SpA
Publication of EP1158081A1 publication Critical patent/EP1158081A1/en
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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D51/00—Driving, starting, or stopping arrangements; Automatic stop motions
    • D03D51/02—General arrangements of driving mechanism

Definitions

  • the present invention concerns a drive unit for weaving looms, and particularly a new type of drive unit, with no flywheel and friction clutch, to operate the main and auxiliary devices of a loom.
  • main shaft is meant the shaft which operates the essential weaving devices of the loom, namely the sley with the reed, the weave machine and, in gripper looms, the mechanisms to control the grippers, as well as any auxiliary devices, such as the yarn tensioning devices, the selvedge forming devices, and so on.
  • the known type looms are moreover provided with a secondary motor, connected to the weave machine by a respective clutch, which is used to carry out the shed search as well as to operate the whole loom in slow running conditions.
  • the weave machine is disconnected from the main shaft of the loom and the secondary motor can operate the weave machine in forward gear or in reverse gear, to carry out the search of the shed containing a faulty weft to be eliminated, or to perform other special weaving operations.
  • the angular position of the weave machine can thus be modified in respect of the angular position of the main shaft, namely in respect of the weft beating up and picking devices, the correct phase timing between said devices and the weave machine being easily obtained, for example thanks to clutches having only one possible angular coupling position.
  • both the main weaving devices and the weave machine are in constant mesh with the main motor through synchronous gearings, an insertion clutch further being optionally provided to disengage the weave machine only from the drive.
  • the auxiliary motor transmission further consists of a satellite gearing and said transmission overlaps the main motor transmission, to control - in backward motion - only the warp beam and the cloth beam without interfering with the loom main motion.
  • the weave machine works only in forward motion, and when it is necessary to search for a previous shed where a weaving fault occurred, the weaving programme of the weave machine is selected backwards through the electronic control device of said machine. This document does hence not disclose that the main motor driving the loom can separately control the weave machine and the weaving devices.
  • the object of the present invention is to simplify the driving systems of a weaving loom by using a single driving motor, while allowing the normal and correct performance of the different loom operations above described.
  • a drive unit for a weaving loom comprising a main shaft which operates the essential weaving devices of the loom, a driven shaft which operates a weave machine, and an electric motor for loom operation, characterized in that, said motor is connected to the main shaft through a first synchronous gearing comprising a disengageable clutch, and to the driven shaft through a second synchronous gearing in constant mesh.
  • the drive unit for looms of the present invention comprises a main motor 20 which operates the main shaft 21 of the loom through a train of gears comprising a pinion 22, coaxial to the motor 20, and a gearwheel 23.
  • the main shaft 21 merely operates the weaving devices - diagrammatically illustrated by the block 27 - namely the sley and, in the case of gripper looms, the mechanisms to control the grippers as well as any auxiliary weaving devices, for instance the selvedge forming devices.
  • the gearwheel 23 is connected to the main shaft 21 by means of an electro-mechanical front clutch 28, remote controlled by a driving unit 30 which is in turn controlled by a control unit 31.
  • the gearwheel 23 acts as an idle wheel.
  • the pinion 22 also operates a gearwheel 24 constantly meshing therewith, said gearwheel 24 being coaxial to and integral with a driven shaft 25.
  • the driven shaft 25 is connected to the weave machine - diagrammatically illustrated by the block 26 - and to any other auxiliary devices thereof.
  • said unit comprises - likewise as indicated with reference to the first embodiment thereof - the main motor 20 which operates the main shaft 21 of the loom through the train of gears comprising the pinion 22, coaxial to the motor 20, and the gearwheel 23. Also in this second embodiment, the main shaft 21 merely operates the aforementioned weaving devices 27, to which it is directly connected.
  • the gearwheel 23 is connected to a gearwheel 23b coaxial thereto, which is in turn connected to a gearwheel 24 by way of a synchronous gearing, for example a toothed belt, the gearwheel 24 being coaxial to and integral with the driven shaft 25 which operates the weave machine (block 26) as described heretofore.
  • a variant of this second embodiment is illustrated in fig. 2A.
  • the gearwheel 23 meshes directly with the gearwheel 24 connected to the driven shaft 25; when the clutch 28 is disengaged, the gearwheel 23 acts as an idle wheel in the kinematic mechanism transmitting the motion from the motor 20 to the weave machine 26.
  • said unit comprises two pinions 22a and 22b, the first one mounted on the output shaft of the motor 20 and the second one on an intermediate shaft 34, coaxial and aligned thereto, which is operated by the shaft of the motor 20 by way of an electromechanical front clutch 28a, fully similar to the clutch 28 of the previous embodiments.
  • the pinions 22a and 22b are respectively meshing with the gearwheels 24 and 23 connected, respectively, to the driven shaft 25 and to main shaft 21, so that - as it happens in the previous embodiments - the driven shaft 25 is always connected to the movement of the motor 20, while the main shaft 21 can be disconnected therefrom by disengagement of the clutch 28.
  • the angular positions of rotation of the gearwheel 23 and of the shaft 21 are respectively and instantly detected by means of position sensors 29a and 29b - for instance of the encoder type - which provide to send corresponding signals to the control unit 31; it is hence possible to connect the gearwheel 23 to the main shaft 21 in different angular positions, variable at choice, according to a program controlled by the control unit 31 according to the loom weaving conditions.
  • the sensor 29a is positioned upstream of the clutch 28 and the sensor 29b is positioned on the shaft 21 which, in this case, is connected to the gearwheel 23.
  • the angular shifting value will thus be reckoned directly between the output shaft of the motor 20 and the main shaft 21.
  • a third sensor 29c is finally provided close to the weave machine 26, to detect the momentary angular position of the driven shaft 25.
  • This arrangement hence allows to obtain a programmed automatic phase timing variation, possibly also during the weaving operation, between the loom weaving devices 27 and the weave machine 26 which determines the opening and closing movements of the shed.
  • the electromechanical clutch 28 allows a plurality of coupling positions, separated by a constant angular pitch; said angular pitch thus determines the minimum possible angular phase shifting value between the gearwheel 23 and the main shaft 21.
  • the drive unit for looms of the present invention does not comprise at all the flywheel and brake/friction clutch devices which are normally provided in the known type drive units for the purpose of making the loom rotation speed as constant as possible, independently from the cyclically variable stresses imparted by the weaving devices on the drive unit, and of allowing a fast stopping of the loom.
  • the main motor 20 is current controlled so as to continuously vary its driving torque and/or its direction of rotation. Said type of control is obtained by means of a driving unit 30, which operates the motor 20 and the electromechanical clutch 28 according to the control signals received from a control unit 31, so as to obtain different working conditions of said motor and thus of the loom.
  • the clutch 28 is in an engaged position and the motor 20 operates both the weaving devices 27 and the weave machine 26 at the wanted speed - thus, possibly, also at a slow speed - by suitably adjusting the torque of the motor 20 to keep the speed at the desired constant level. By inverting the torque direction, it is instead possible to obtain the required gradual or prompt braking effect.
  • the clutch 28 can be disengaged; then, by starting again the motor 20, it is possible to obtain the desired movements of the weave machine only, in forward and reverse gear, to carry out the search of the shed containing a faulty weft to be eliminated. Said operation should of course take place in a preselected angular range of the loom weaving devices 27, such that the grippers are external to the shed.
  • the gearwheel 23 is caused to rotate at low speed up to reaching the desired phase timing with the main shaft 21 of the loom, which timing is detected, as said above, by means of the sensors 29.
  • the actual condition of engagement/disengagement of the electromechanical front clutch 28 is detected by means of a proximity switch 32 connected to the control unit 31.
  • a proximity switch 32 connected to the control unit 31.
  • the position of the clutch 28 can be reckoned by sending a torque pulse to the motor 20 and simultaneously reading the position sensors 29.
  • a safety brake 33 is also provided to keep the loom and the weave machine in a blocked position during the operations to eliminate faulty wefts and in case of failure of the electric current supply, so as to prevent any undesired movement of the loom under the action of elastic forces imparted by the weave machine or by the warp yarns.
  • a clutch brake or a blocking brake 35 acts moreover during the operations of shed search, said brake acting on the main shaft 21 of the loom in order to oppose the residual potential energy of the weaving devices 27.
  • the drive unit according to the present invention has fully reached the intended object, seen that it allows to perform with a single motor - without making use of any complicated structure - any possible desired operations of the loom components, thanks to the fact that said motor is always connected to the weave machine, while it can be connected at will to the loom weaving devices by automatically setting the required phase timing.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Woven Fabrics (AREA)
  • Electrophotography Configuration And Component (AREA)
EP01112634A 2000-05-25 2001-05-24 Weaving loom drive, with no flywheel and friction clutch Revoked EP1158081B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2000MI001157A IT1317570B1 (it) 2000-05-25 2000-05-25 Gruppo di comando di un telaio di tessitura,privo di volano e frizione
ITMI001157 2000-05-25

Publications (2)

Publication Number Publication Date
EP1158081A1 EP1158081A1 (en) 2001-11-28
EP1158081B1 true EP1158081B1 (en) 2005-01-19

Family

ID=11445117

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01112634A Revoked EP1158081B1 (en) 2000-05-25 2001-05-24 Weaving loom drive, with no flywheel and friction clutch

Country Status (6)

Country Link
EP (1) EP1158081B1 (it)
AT (1) ATE287465T1 (it)
DE (1) DE60108443T2 (it)
ES (1) ES2231343T3 (it)
HK (1) HK1041909A1 (it)
IT (1) IT1317570B1 (it)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2838752B1 (fr) 2002-04-22 2005-02-25 Snecma Moteurs Procede de formation d'un revetement ceramique sur un substrat par depot physique en phase vapeur sous faisceau d'electrons
ITMI20030817A1 (it) * 2003-04-18 2004-10-19 Promatech Spa Innesto di marcia lenta e ricerca del passo a flusso
ITVI20040129A1 (it) * 2004-05-25 2004-08-25 Smit Spa Dispositivo di comando per telai tessili
BE1016108A6 (it) * 2004-07-05 2006-03-07 Picanol Nv
CN101058917B (zh) * 2007-05-26 2010-11-03 万祖干 离合器分离型大扭矩织机倒综机构
IT1397372B1 (it) 2009-12-30 2013-01-10 Promatech Spa Unita' di comando per telai tessili ad elevata flessibilita' di uso, munita di dispositivo di controllo di sicurezza rispetto a possibili sfasamenti critici degli organi meccanici mobili e procedimento di tessitura che utilizza tale unita'
CN102493108A (zh) * 2011-12-07 2012-06-13 恒天重工股份有限公司 一种织机的直接驱动传动装置
CN103849991B (zh) * 2014-02-20 2015-12-23 浙江万利纺织机械有限公司 一种开关磁阻电机驱动的织机传动与织机位置自动标定系统
CN108866760B (zh) * 2018-09-13 2020-09-22 山东日发纺织机械有限公司 剑杆织机自动寻纬装置
CN109338575B (zh) * 2018-09-20 2021-06-15 西安工程大学 一种基于摩擦力反馈的上下织轴协同方法
CN116123262B (zh) * 2023-01-10 2023-08-08 浙江泰坦股份有限公司 一种织机传动装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3311670C2 (de) * 1983-01-18 1986-05-22 Textilma Ag, Hergiswil Webmaschine

Also Published As

Publication number Publication date
ES2231343T3 (es) 2005-05-16
DE60108443D1 (de) 2005-02-24
IT1317570B1 (it) 2003-07-09
ITMI20001157A0 (it) 2000-05-25
DE60108443T2 (de) 2005-06-23
ITMI20001157A1 (it) 2001-11-25
EP1158081A1 (en) 2001-11-28
HK1041909A1 (en) 2002-07-26
ATE287465T1 (de) 2005-02-15

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