WO2009127255A1 - Dispositif de tirage de tissu - Google Patents

Dispositif de tirage de tissu Download PDF

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Publication number
WO2009127255A1
WO2009127255A1 PCT/EP2008/054616 EP2008054616W WO2009127255A1 WO 2009127255 A1 WO2009127255 A1 WO 2009127255A1 EP 2008054616 W EP2008054616 W EP 2008054616W WO 2009127255 A1 WO2009127255 A1 WO 2009127255A1
Authority
WO
WIPO (PCT)
Prior art keywords
draw
fabric
frame
stationary
rotating
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.)
Ceased
Application number
PCT/EP2008/054616
Other languages
English (en)
Inventor
Filippo Oneda
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.)
Memminger IRO GmbH
Original Assignee
Memminger IRO GmbH
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 Memminger IRO GmbH filed Critical Memminger IRO GmbH
Priority to CN2008801286780A priority Critical patent/CN102007241B/zh
Priority to PCT/EP2008/054616 priority patent/WO2009127255A1/fr
Priority to EP08736290A priority patent/EP2271799B1/fr
Priority to AT08736290T priority patent/ATE537285T1/de
Publication of WO2009127255A1 publication Critical patent/WO2009127255A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
    • D04B15/88—Take-up or draw-off devices for knitting products

Definitions

  • the invention relates to a fabric draw-off apparatus for rolling up fabric released by a circular knitting machine and for applying a defined longitudinal force to the fabric .
  • Circular knitting machines usually release tubular knitwear.
  • large size knitting machines are known which produce endless tubular knitwear which is to be rolled up by a large roller.
  • the knitwear rotates around a vertical axis due to the rotational movement of the knitting cylinder of the circular knitting machine. It is necessary to have the horizontal shaft of the rolled up knitwear rotating around the vertical axis with a rotational speed which is equal to the rotational speed of the knitting cylinder. Therefore, known draw-off apparatuses comprise a mechanical transmission which connects the drive of the knitting cylinder to a rotating frame of the roll-up roller.
  • the draw-off device contributes to the inertia of the knitting cylinder. This might have detrimental effects when starting and stopping or accelerating and decelerating the rotational movement of the knitting cylinder.
  • the rotational movement of the rollers of the roll-up device, with respect to their horizontal axes, is usually taken from the main drive which primarily drives the knitting cylinder.
  • Swiss document CH 535 855 discloses a draw-off device comprising a transmission for rotating the draw-off rollers in response to the rotation of the rotating support frame of the rollers.
  • the transmission defines the ratio of the rotational speeds of the rollers and the frame. If the operator needs to amend the gear ratio he ought to replace the gear sets which might be time consuming and cumbersome.
  • a draw-off device is desirable which enables quick and easy adjustments of the rotational speeds of the draw-off rollers.
  • Another object of the invention is the reduction of the inertia to be handled by the main cylinder driving motor of the knitting machine.
  • the inventive draw-off apparatus comprises roller means for winding up fabric produced and released by the circular knitting machine.
  • the roller means comprises at least one roller, rotatably journalled by coaxial bearings defining a horizontal rotational axis.
  • the draw-off roller is driven by draw-off drive motor.
  • the roller and the motor are supported by the movable frame which in turn rotates about a vertical axis.
  • Rotary electrical interface means are provided for supplying electricity from a non-rotating stationary base to the rotating frame and the draw-off drive motor carried by the frame.
  • the draw-off drive motor can be driven independently from the rotation of the main cylinder of the knitting machine. It is no longer necessary to replace gear sets if the rotational speed of the draw-off roller is to be readjusted.
  • the inventive concept provides a simple, safe and precise adjustment of the rotational speeds of the draw-off rollers. If necessary, further functions may be included. It is possible to monitor the tension of the fabric and to control the rotational speed of the draw-off rollers aiming to keep the tension constant. Moreover it is possible to sense the weight of the bale consisting of rolled up fabric and to emit a signal if a limit is reached.
  • the rotation of at least one of the draw-off rollers may be reversed. This removes any tension from the fabric between the draw-off rollers and the bale. The operator is no longer requested to do that by hand which shortens the time period necessary for removing the coil or bale and starting a new one .
  • the invention provides a way for winding up the fabric with constant tension in high quality. It is possible to compensate for different radii of the coil formed by the fabric on the wind up shaft. Moreover, it is possible to compensate for the weight of the coil which is slowly increasing during operation.
  • the draw-off device comprises at least one roller for advancing the fabric for drawing it off the knitting machine and additionally at least another shaft or roller for rotating the bale for rolling up the fabric.
  • Both types of rollers may be driven by one single electric drive motor.
  • separate motors are provided which may be energized independently. It is possible to operate the motor of the draw-off rollers tension controlled or position controlled while operating the motor of the wind up roller in a torque controlled, position controlled or tension controlled mode of operation.
  • the rotary electrical interface means supplies power from a non-rotating stationary base to the at least one draw-off drive motor.
  • the electrical leads of the rotary electrical interface means may be directly connected to the at least one draw-off motor.
  • a control unit controlling the operation of the motor may be placed on the non-rotating base frame.
  • a control unit may be placed on the rotating frame. This approach makes it possible to reduce the number of electrical connections of the rotary electrical interface means to a minimum which may be two or three.
  • the electrical connections may be formed by brushes and slip rings.
  • the control unit may control one, two or some electrical motors for driving the rollers carried by the rotating frame.
  • the control unit of the rotating frame may process signals and/or data received from outside, e.g. from another control unit which is located on the non-rotating base frame. Additionally or alternatively, the control unit may process signals or data supplied by sensor means carried by the rotating frame. Sensor means may include position sensors, resolvers current responsive sensors, voltage responsive sensors, switches, weighting cells, strain gauges or the like. A radio transmitter system may be present which transmits signals and/or data from outside to the control unit located on the rotating frame and vice versa.
  • the control unit of the rotating frame and the outside control unit may be in data communication permanently or from time to time. Thus the stationary control unit may have complete control over the roll-up process. However merely a two pole rotary electrical interface is necessary on the rotating frame.
  • the rotating frame Due to the individual drive of the rotating frame, the rotating frame and the elements it carries will not add to the inertia of the rotating cylinder of the knitting machine.
  • the rotating frame is separately driven and not directly coupled to the cylinder.
  • the control unit of the draw-off device will mainly keep the rotating frame and the rotating cylinder rotating in synchronism. However, the control unit may allow some degree of temporal differences of the rotational speeds. Thus it is possible to quicker start and stop the knitting machine.
  • the draw-off motor (s) are installed on, and carried by, the rotating frame of the draw-off device and rotate together with the frame.
  • the movement of the rotating frame is electrically coupled to the rotation of the main cylinder of the knitting machine.
  • the speed ratio of the rotational speed of the rotating frame to rotational speed of the draw-off rollers can be controlled by a wireless communication system which connects the machine controller of the knitting machine to the control unit of the draw-off device.
  • the rotary electrical interface means can be reduced to a system which provides only two electrical connections from the stationary frame to the rotating frame.
  • the control unit of the rotating frame may also comprise control sensors as there are tension sensors, position sensors, switches and the like as well as actuators as there are knives for cutting the fabric and the like.
  • the system is able to draw-off the fabric with controlled tension irrespective of the weight of the wound up coil of fabric.
  • a preferred embodiment comprises an air supply including a stationary duct associated to the stationary frame and a rotating head associated to the rotating frame.
  • the electrical leads may pass through the stationary duct and connect the stationary member of the rotary electrical interface means.
  • This assembly provides a permanent supply of pressurized air and electrical power from the stationary part of the frame to the rotating part. Pressurized air can be used for operating at least one pneumatic actuator, at least one pneumatic cylinder, blower nozzles for blowing the fabric into a desired shape or position and the like.
  • Figure 1 is a schematic illustration of a rotary knitting machine and a draw-off device cooperating therewith
  • Figure 2 is the inventive draw-off device of Fig. 1 in perspective view
  • Figures 3 and 4 are rotary electrical interface means in cross-sectional views
  • Figure 5 is an alternative embodiment of the inventive draw-off device
  • FIG. 6 is a block diagram of another embodiment of the inventive draw-off device.
  • Figure 7 a cross sectional illustration of a base portion and a frame portion of the inventive draw-off device .
  • the rotary knitting machine 1 comprises a stationary frame 2, supporting a hollow knitting cylinder 3 which circumscribes a vertical rotational axis 4.
  • a main drive is provided (not illustrated) for rotating the knitting cylinder 3 in a defined direction.
  • knitwear 5 leaves the cylinder 3 running downwards.
  • the knitwear 5 is usually tubular shaped. It has to be rolled up for forming a bale 6 or coil.
  • the knitwear 5 may be cut longitudinally and opened to a single sheet which will be rolled up. Alternatively the fabric tube may remain uncut. In the latter case, the knitwear forms a double layer in each winding of the bale 6.
  • a draw-off device 7 is located below the knitting cylinder 3 for drawing the knitwear downwards and for rolling up the knitwear 5.
  • the draw-off device 7 pulls down and holds down the fabric 5 which supports the knitting process.
  • a uniform draw-off force applied to the fabric by the draw-off apparatus will greatly contribute to the quality of the manufacturing process.
  • the draw-off device 7 has to rotate the bale 6 about an axis which is coaxial to the tubular fabric in order to avoid warping of the knitwear 5.
  • the axis may be arranged vertically and coaxial to axis 4.
  • the take-off device 7 comprises a rotatable frame 8 consisting of a horizontal beam 9 and vertical uprights 10, 11 located at the ends of beam 9 and being located in parallel one to another.
  • the upright 10, 11 are arranged in parallel to the rotational axis of the frame 8.
  • Frame 8 supports roller means 12. At least, one, preferably three draw-off rollers 13, 14 and 15 having horizontal rotational axes are rotationally supported at their ends at the upper ends of uprights 10 and 11. At least one of the rollers 13, 14 and 15 is driven by an electric motor
  • motor 16 which is carried by the movable frame 8.
  • motor 16 is mounted on of uprights 10 and 11 in order to drive at least one of the rollers 13, 14 and 15.
  • motor 16 is a DC motor coupled to an angular gear
  • the rotating frame 8 rotationally supports a horizontal shaft 18 for receiving the fabric and rolling it up in order to form the bale 6.
  • the ends of shaft 18 are rotatably supported on slider elements 19, 20 which may slide upwards and downwards on uprights 10 and 11.
  • the roller means 12 further comprise rollers 21, 22 rotatably supported on the frame 8. Rollers 21, 22 are adapted to receive the bale 6 which rests on them.
  • At least one of the rollers 21, 22, preferably both of them, is driven by an electric motor 23 to rotate in a defined direction.
  • Motor 23 is connected to the rollers 21, 22 by means of an angular transmission 24 or any other suitable means.
  • Both motors 16 and 23 may be located at the same upright 11. Alternatively, motors 16 and 23 may be positioned at different locations. It is in particular possible to use electric motors built in into at least one of the rollers 13, 14, 15, 21 and 22 which motors are known as tubular mo- tors .
  • the rotating frame 8 is rotatably mounted on a base frame 25 which carries a frame drive motor 26.
  • the frame drive motor 26 may include a transmission the output of which is connected to a pinion 27 for driving frame 8 by a belt 28.
  • figure 2 illustrates the overall structure
  • figure 3 more or less schematically illustrates bearing means 29 for journaling the rotating frame 8.
  • the bearing means 29 may include several bearings, in particular roller bearings as there are radial bearing 30, 31 and at least one thrust bearing 32.
  • Adjacent to bearing means 29, a rotary electrical interface 33 is provided which electrically couples at least one motor 23 mounted on rotational frame 8 to a power supply 34 mounted stationary.
  • At least optionally an air coupling (not illustrated in figure 3) may be provided which connect an pressurized air supply apparatus to pressurized air consuming units on the frame 8.
  • the rotary electrical interface 33 may comprise brushes 35, 36 and an insulating member which holds the brushes 35, 36.
  • Slipper rings 37, 38 are carried by the rotational frame 8.
  • the slipper sings 37, 38 are electrically insulated from the frame and one to another.
  • the slipper ring arrangement may connect a stationary wire 39 to a rotating wire 40 and a stationary wire 41 to a rotating wire 42.
  • the slipper ring arrangement may have dry contacts. Alternatively, it may comprise wet contacts, at least par- tially consisting of liquid metal as there is mercury of gallium.
  • a rotational transformer 43 may form the rotational electrical interface 33, see figure 4.
  • Transformer 43 comprises a stationary member 44 and a ro- tatable member 45 each consisting of an armature and at least one coil. Additionally a rotatable air coupling may be provided as previously mentioned in view of figure 3.
  • the motors 16, 23, 34 are controlled by a control which may consist of two control units 46, 47, one of them carried by the rotating frame 8 and the other one located stationary.
  • stationary control unit 47 may directly control motor 26 according to signals or pulses received by line 48 and indicating the revolutions or increments of the main cylinder 3.
  • Control unit 47 may include the power supply 34 for powering motors 16 and 23.
  • the power supply may be directly connected to the motors 16 and 23 as indicated in figure 3 or power control unit 46 which is preferred.
  • Control unit 46 in turn powers motors 16 and 23.
  • control unit 46 may be connected to at least one sensor 49 (or to several sensors alternatively) .
  • Sensors 49, 50 may be adapted to sense the force acting on the fabric in longitudinal direction thereof ore any other parameter or process variable.
  • the sensors 49, 50 may sense the bearing forces of roller 13.
  • a sensor for reading the current supplied to motor 16 may be provided. If motor 16 is a DC electric motor, the current will be indicative for the torque generated by the motor 16. The torque usually corresponds to the longitudinal force acting on the fabric. Additional switches or sensors may be provided on or at frame 8 for sensing and reading parameters and conditions. Control unit 46 may operate motor 16 and 23 accordingly.
  • a data link 51 may be provided which enables the control units 46 and 47 to communicate.
  • the data link 51 may be formed by at least one electrical wire or an electric bus which leads via the rotary electrical interface 33.
  • data link 51 is most preferably provided by a wireless data transmission system which may be provided by transceivers 52, 53 connected to control units 46, 47 respectively.
  • Transceivers 52, 53 may establish a short range coded data link. They may be part of a wireless local area network.
  • the rotary electrical interface may be reduced to two electrical wires which just transmit power from the stationary power supply 34 to the control unit 46. It is noted, however, that it is possible to place the complete control unit at a stationary base and to run all feeding lines of all motors 16, 23 via the rotary electrical interface 33 which, in this case, comprises a plurality of electrical wires.
  • knitting cylinder 3 rotates in a given direction (clockwise or counter clockwise) .
  • the tubular fabric 5 rotates together with cylinder 3 and must be drawn downwards to safeguard a regular knitting process.
  • the draw-off device 7 provides the draw-off force desired.
  • fabric 5 runs around rollers 13, 14 and 15 frictionally engaging them or being clamped between at least two of them.
  • the torque of motor 16 is therefore transformed into a draw force acting on fabric 5.
  • control unit 46 may control the energizing current of motor 16.
  • sensor means 49, 50 may sense the draw-off force and supply signals indicative for the force to control unit 46.
  • Control unit 46 may now keep the draw-off force constant by controlling the motor current.
  • the bale 6 is wound around shaft 18.
  • the weight of the bale 6 rests on rollers 21, 22.
  • Motor 23 drives rollers 21, 22 in order to rotate the bale 6 so that it takes up the fabric 5 drawn off the knitting machine 1 by rollers 13, 14 and 15.
  • Control unit 46 may control motor 23 so that it winds up the fabric 5 with a constant tension. This is possible due to control of the current of the motor 23 or by controlling it otherwise.
  • control unit 47 will control motor 26 according to signals on line 48 which indicate the rotation of cylinder 3.
  • control unit 47 will start or stop motor 26 accordingly. Most of the time, frame 8 will run in synchronism to cylinder 3. During start or stop of cylinder 3, the rotational position of frame 8 may somewhat differ from the rotational position of cylinder 3. However, this temporary error will only exist shortly and vanish quickly.
  • both control units 46, 47 may communicate and transmit data and signals e.g. start and stop signals, data characterizing the speed or force acting on the fabric or switch signals.
  • Those switch signals may be produced by switches detecting the size of bale 6 and indicating if it reaches the desired diameter. Additionally or alternatively a switch may sense the weight of the bale.
  • FIG. 7 illustrates a preferred embodiment of a combined rotary electrical and pneumatic interface 54.
  • This interface 54 comprises the rotary electrical interface means 33 and a pressurized air rotary interface means 55.
  • the interface 55 comprises a duct member 56, e.g. a pipe or the like, passing through a bearing support 57 carried by the base frame 25.
  • the bearing support 57 carries at least one roller bearing 30, 31 which circumscribes the duct member 56.
  • the outer races of the ball bearings 30, 31 are nested within a through bore of the rotational frame 8.
  • the inner channel of the pipe 56 communicates with an inner space of take-off head 58 which is connected to a tube member 59 for supplying pressurized air to air consumers located on the rotating frame 8.
  • the pipe member 56 is closed at its upper end by the stationary member 60 of the rotary electrically interface means 33.
  • the rotatable member 61 of the interface means 33 is connected, and rotates together with, the rotating frame 8.
  • a pressurized air supply duct 62 is provided which connects the tube 56 to a source of pressurized air or any other source of any fluid which is to be fed to consumers carried by the frame 8. Even vacuum may be applied to the supply duct 62, if desired.
  • the rotary electrical interface means 33 is provided for powering at least one electrical consumer on frame 8.
  • Electrical leads 39, 41 connect the outer power supply 34 (not shown) to connectors of the stationary member 60.
  • the leads pass through the inner duct of the pipe 56.
  • the lower end of the pipe 56 may be closed by any suitable material, a curable resin or the like.
  • the combined rotary electrical and pneumatic interface means 54 avoids any need for providing a tank of pressurized air on or at the rotating frame 8 or any other storage means for fluids, electrical energy and the like. This dramatically reduces the need for maintenance and increases the reliability of the assembly.
  • An electrically driven fabric draw-off device 7 which uses at least one electric motor 16 for driving at least one draw-off roller 13, 14, 15.
  • the electric power is supplied via a rotary electrical interface which electrically connects the motor 16 on rotating frame 8 to the stationary electric supply 34.
  • the rotational movement of frame 8 is caused by another electric motor 26 which is driven in response to a signal indicating the rotational movement of the cylinder 3 of knitting machine 1.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)

Abstract

L’invention concerne un dispositif de tirage de tissu électriquement entraîné (7) qui utilise au moins un moteur électrique (16) pour entraîner au moins un rouleau de tirage (13, 14, 15). La puissance électrique est fournie par l’intermédiaire d’une interface électrique rotative qui connecte électriquement le moteur (16) sur un châssis rotatif (8) à l’alimentation électrique stationnaire (34). Le mouvement rotatif du châssis (8) est provoqué par un autre moteur électrique (26) qui est entraîné en réponse à un signal indiquant le mouvement rotatif du cylindre (3) de la machine à tricoter (1).
PCT/EP2008/054616 2008-04-16 2008-04-16 Dispositif de tirage de tissu Ceased WO2009127255A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CN2008801286780A CN102007241B (zh) 2008-04-16 2008-04-16 织物抽取装置
PCT/EP2008/054616 WO2009127255A1 (fr) 2008-04-16 2008-04-16 Dispositif de tirage de tissu
EP08736290A EP2271799B1 (fr) 2008-04-16 2008-04-16 Dispositif de tirage de tissu
AT08736290T ATE537285T1 (de) 2008-04-16 2008-04-16 Warenabzugsvorrichtung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2008/054616 WO2009127255A1 (fr) 2008-04-16 2008-04-16 Dispositif de tirage de tissu

Publications (1)

Publication Number Publication Date
WO2009127255A1 true WO2009127255A1 (fr) 2009-10-22

Family

ID=39465930

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/054616 Ceased WO2009127255A1 (fr) 2008-04-16 2008-04-16 Dispositif de tirage de tissu

Country Status (4)

Country Link
EP (1) EP2271799B1 (fr)
CN (1) CN102007241B (fr)
AT (1) ATE537285T1 (fr)
WO (1) WO2009127255A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20091711A1 (it) * 2009-10-07 2011-04-08 Santoni & C Spa Dispositivo avvolgitore per l'avvolgimento di una striscia di tessuto o di maglia o simile su un rullo, particolarmente per macchine circolari per maglieria.
CN106149173A (zh) * 2016-08-30 2016-11-23 海宁市舒雅达纺织有限公司 一种剑杆织机的布料自动卷取装置
CN119194005A (zh) * 2024-11-28 2024-12-27 烟台永昌精密织针有限公司 一种金属织针淬火设备及淬火工艺

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104370261B (zh) * 2013-08-12 2017-04-12 苏州维艾普新材料股份有限公司 一种浆料的立式分段抽取再混合装置及方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3791177A (en) * 1971-01-21 1974-02-12 Stibbe Machinery Ltd Circular knitting machines
US5537845A (en) * 1995-05-02 1996-07-23 Lin; Chin-Yung Synchronous cloth-rolling apparatus of a knitting machine
EP1087048A2 (fr) * 1999-09-24 2001-03-28 Precision Fukuhara Works, Ltd. Dispositif de réglage de la densité d'étoffe et mécanisme de contrôle d'alimentation en fil pour un métier à tricoter circulaire

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1314852B1 (it) * 2000-06-21 2003-01-16 Vittorio Cabibbo Supporto di serraggio a fascetta per applicare a parete condotteesterne ed altro

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3791177A (en) * 1971-01-21 1974-02-12 Stibbe Machinery Ltd Circular knitting machines
US5537845A (en) * 1995-05-02 1996-07-23 Lin; Chin-Yung Synchronous cloth-rolling apparatus of a knitting machine
EP1087048A2 (fr) * 1999-09-24 2001-03-28 Precision Fukuhara Works, Ltd. Dispositif de réglage de la densité d'étoffe et mécanisme de contrôle d'alimentation en fil pour un métier à tricoter circulaire

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20091711A1 (it) * 2009-10-07 2011-04-08 Santoni & C Spa Dispositivo avvolgitore per l'avvolgimento di una striscia di tessuto o di maglia o simile su un rullo, particolarmente per macchine circolari per maglieria.
WO2011042298A1 (fr) * 2009-10-07 2011-04-14 Santoni S.P.A. Dispositif d'enroulement destiné à enrouler une bande de tissu ou de matière tricotée ou similaire sur un rouleau, en particulier pour machines de tricotage circulaires
CN106149173A (zh) * 2016-08-30 2016-11-23 海宁市舒雅达纺织有限公司 一种剑杆织机的布料自动卷取装置
CN119194005A (zh) * 2024-11-28 2024-12-27 烟台永昌精密织针有限公司 一种金属织针淬火设备及淬火工艺

Also Published As

Publication number Publication date
CN102007241B (zh) 2012-09-05
CN102007241A (zh) 2011-04-06
EP2271799B1 (fr) 2011-12-14
ATE537285T1 (de) 2011-12-15
EP2271799A1 (fr) 2011-01-12

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