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WO1999004075A1 - Systeme d'entrainement pour au moins une lame de metier mecanique - Google Patents

Systeme d'entrainement pour au moins une lame de metier mecanique Download PDF

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Publication number
WO1999004075A1
WO1999004075A1 PCT/EP1998/004164 EP9804164W WO9904075A1 WO 1999004075 A1 WO1999004075 A1 WO 1999004075A1 EP 9804164 W EP9804164 W EP 9804164W WO 9904075 A1 WO9904075 A1 WO 9904075A1
Authority
WO
WIPO (PCT)
Prior art keywords
drive
axis
lever
drive system
movement
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/EP1998/004164
Other languages
German (de)
English (en)
Inventor
Henry Shaw
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.)
Picanol NV
Original Assignee
Picanol NV
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 Picanol NV filed Critical Picanol NV
Publication of WO1999004075A1 publication Critical patent/WO1999004075A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C13/00—Shedding mechanisms not otherwise provided for
    • D03C13/02—Shedding mechanisms not otherwise provided for with independent drive motors
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C1/00—Dobbies
    • D03C1/14—Features common to dobbies of different types
    • D03C1/148—Eccentrics
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C5/00—Cam or other direct-acting shedding mechanisms, i.e. operating heald frames without intervening power-supplying devices
    • D03C5/02—Cam or other direct-acting shedding mechanisms, i.e. operating heald frames without intervening power-supplying devices operated by rotating cams

Definitions

  • the invention relates to a drive system for at least one heald frame of a loom with a lever which can be pivoted back and forth by means of a drive and which is connected to the heald frame by means of transmission elements.
  • the invention has for its object to design a drive system of the type mentioned so that the course of the movement of the heald frame can be varied.
  • the position of the axis of the lever can be changed by means of controllable drive means.
  • the course of the movement of a heald frame is determined by two components, namely by a basic course of movement which is predetermined by the drive for pivoting the lever back and forth, and by a corrective course of movement which is determined by the Changing the position of the axis of the lever is predetermined by means of the controllable drive means.
  • the invention makes it possible to change the course of movement of the heald frame during operation.
  • the course of movement of the heald frame is essentially determined by the drive which causes the lever to pivot back and forth, so that this drive must exert the essential portion of the energy which is required to move the heald frame.
  • the controllable drive means for changing the position of the axis of the lever must apply a comparatively low drive energy in order to superimpose a corrective movement course on the heald frame. This is advantageous for the design of these drive means, especially since they are not subjected to excessive heat.
  • FIG. 1 shows a schematic representation of a drive system for a heald frame
  • FIG. 2 shows a schematic representation of a part of a drive system for a plurality of heald frames, the elements being projected onto a plane
  • FIG. 3 shows a representation corresponding to FIG. 2 of a modified embodiment
  • FIG. 4 shows a schematic view of an embodiment similar to FIG. 3
  • Fig. 5 shows an embodiment similar to Fig. 2 and
  • FIG. 6 shows an embodiment similar to FIG. 5.
  • the drive system 1 shown in FIG. 1 for a heald frame 14 contains a drive shaft 2 on which an eccentric 3 is arranged in a rotationally fixed manner.
  • the eccentric 3 drives a transmission arm 4 in the direction of arrow A in a reciprocating movement.
  • the transmission arm 4 is articulated by means of an axis 27 on an arm 6A of a lever 6 which is mounted so as to be pivotable about an axis 5.
  • the other lever arm 6B of the lever 6 is connected to the heald frame 14 by means of a connecting element 7, transmission rods 8, 9, 10, 11 and transmission levers 12, 13 arranged between them.
  • the connecting element 7 can be adjusted in the direction of arrow C on the lever arm 6B of the lever and fixed in the selected position by means of fastening means 15.
  • the transmission arm 4 is rotatably mounted on the eccentric 3, which in turn is non-rotatably connected to the drive shaft 2.
  • the transmission arm is connected to the lever arm 6A of the lever 6 by means of the axis 27, wherein the axis 27 can be rotatably mounted both in the transmission arm 4 and in the lever arm 6A.
  • the position of the axis 5, about which the lever 6 is pivotably pivoted, can be changed by means of a device 16 which contains a controllable electric drive motor 17.
  • the device 16 contains a rocker arm 18 which can be pivoted about a stationary axis 19.
  • a transmission arm 20 of an eccentric drive with an axis 26 is articulated to the rocker 18 between its stationary axis 19 and the axis 5 of the lever 6.
  • an eccentric 21 which is rotatable about an axis 22 and to which a gearwheel 23 is connected in a rotationally fixed manner.
  • the gearwheel 23 is in engagement with a gearwheel 24 which is arranged in a rotationally fixed manner on a motor shaft 25 of the drive motor 17.
  • Fig. 1 the heald frame 14 is shown in a middle or neutral position, in which it is approximately in the middle of its uppermost and its lowest position.
  • the axis 5 of the lever 6 and the axis 19 of the rocker 18 and the axis 27, which connects the transmission arm 4 to the lever 6, lie essentially in a common plane 28.
  • the axes 5, 19 and 27 run parallel to each other.
  • the plane 28 runs almost perpendicular to a plane 33 in which the drive shaft 2 and the axis 27 are located, which likewise run parallel to one another.
  • the axis 5 of the lever 6 can be moved in a circular section in the direction B by means of the drive motor 17 and the rocker 18.
  • direction B runs essentially parallel to the direction of movement A in which the axis 27 moves.
  • the direction B also runs essentially parallel to the curved lever arm 6B of the lever 6, along which the connecting element 7 is adjustable and fixable in the direction C.
  • This arrangement is advantageous for the course of movement of the heald frame 14, which is possible by changing the position of the axis 5 by means of the device 16.
  • movement course means not only the change in the position of the heald frame 14, but also the course of the speed and acceleration of the heald frame 14.
  • FIG. 2 which shows a drive system for four heald frames
  • the drive shaft 2 is only schematic by means of a shown drive unit 30 driven.
  • This can be the main drive unit of the weaving machine, for example, which is driven by a main drive motor, not shown.
  • the drive unit 30 is a controllable, electric drive motor which is controlled, for example, synchronously with the main drive unit of the weaving machine or else according to a course stored in a program in a control unit of the weaving machine as a function of the movement of the main drive unit.
  • the control of a drive unit 30 designed as an independent drive motor in connection with the drive motor 17 makes it possible to design the movement course of a heald frame 14 almost as desired.
  • the drive shaft 2 is provided with a plurality of eccentrics 3, each of which drives a transmission arm 4.
  • the transmission arms 4 in turn drive a lever 6 via the axes 27, which lever can be rotated about an axis 5.
  • the levers 6 are coupled to a heald frame 14 via transmission elements, not shown, for example in accordance with FIG. 1.
  • Each lever 6 can be pivoted about its own axis 5, the position of which can be changed in each case by pivoting a rocker 18 about an axis 19.
  • the controllable drive motor 17 drives an axle 22 via the toothed wheels 23 and 24, on each of which eccentrics 21 for driving the rockers 18 are arranged in a rotationally fixed manner.
  • the eccentricity of the eccentrics 21, which are assigned to the transmission arms 20 and thus to the levers 6, can be the same or different.
  • the phase, ie in the exemplary embodiment the angular position of the individual eccentrics 21 in relation to the axis 22, can be selected to be the same or different. This makes it possible to move the axes 5 the same or different, with the result that the course of movement of the individual heald frames can be chosen to be the same or different.
  • the crossing height the height at which the heald frames cross
  • the cross point in time the points in time at which the heald frames cross
  • the drive shaft 2 transmits an essentially sinusoidal basic movement course to the heald frame 14 via the eccentric 3 and the transmission arm 4.
  • the course of movement which results from the superposition of the basic course of movement with the correction course of movement due to the change in the position of axis 5, thereby deviates from the above-mentioned essentially sinusoidal basic course of movement.
  • the movement path achieved consists, for example, of a so-called asymmetrical movement path, i.e. from a course that is square or flatter than the course of a sine curve.
  • the pivoting of the lever 6 by means of the drive shaft 2, the eccentric 3 and the transmission arm 4 contributes relatively more to the movement of a heald frame 14 than the change in the position of the axis 5.
  • the drive shaft 2 supplies the largest part the energy required to move the heald frame 14.
  • the drive motor 17 therefore only has to deliver a smaller proportion of energy and can therefore be easily controlled, and only a relatively small amount of heat is generated on it.
  • the phase of the eccentric 21 and the phase of the eccentric 3 are suitably adjusted to one another, for example in such a way that it is possible to hold a heald frame 14 in an upper or a lower position for a longer time.
  • the drive motor 17 is driven by a control unit 34 such that its movement is adapted to the movement of the drive shaft 2.
  • An encoder disk 35 is attached to the drive shaft 2 and is assigned a detector 36 which is connected to the control unit 34.
  • the control unit 34 determines the course of movement of the drive shaft 2 and controls the drive motor 17 with a corresponding course of movement, for example with a synchronous or identical course of movement.
  • the drive motor 17 may contain a detector, which is not shown, and which feeds feedback signals to the control unit 34.
  • the course of movement of the drive motor 17 does not of course have to be synchronous with the drive shaft 2.
  • the course of movement of the drive motor 17 is stored in the control unit 34, for example depending on the type of weft thread to be inserted.
  • the drive motor 17 is then controlled for each weaving cycle or each weft thread to be inserted according to a predetermined course of movement which is assigned to the weft thread to be inserted in each case.
  • This stored movement profile can be stored, for example, as a function of different positions of the drive shaft 2.
  • the drive motor 17 is then controlled, for example, by means of the control unit 34 at a predetermined speed and a predetermined acceleration into a predetermined position.
  • the course of movement of the drive motor 17 is set for each shed to be formed.
  • an associated movement profile is stored in the control unit 34 for each shed to be formed, as was described above for weft threads to be inserted.
  • the movement path of the axis 5 is set differently, for example when three heald frames move up and one heald frame moves down than when three heald frames move downward and one heald frame moves upward.
  • each associated fabric part To bring axis 5 according to a predetermined course of movement into a predetermined position which is adapted to the part of the fabric to be woven. It is also possible to stop the axis 5 in a specific position when weaving a given piece of fabric. In addition, it is possible to change the position of the axis 5 during weaving so that certain effects are achieved in a fabric part.
  • each axis 5 of the lever 6 can be displaced by means of its own drive motor 31.
  • the axis 22 is arranged stationary.
  • the eccentrics 21, which are driven by the associated drive motor 31, rotate about the shaft 22 in order to drive a transmission arm 20 in each case.
  • Each drive motor 31 can be controlled according to the drive motor 17 according to FIG. 2 by means of a control unit, not shown.
  • the exemplary embodiment according to FIG. 3 differs from that according to FIG. 2, since in the exemplary embodiment according to FIG. 3 it is not only possible to select the movement course for each heald frame accordingly by a corresponding selection of the phase and eccentricity of the eccentrics 3, but also that it is also still possible to choose the course of movement of each heald frame by means of a corresponding control of each drive motor 31 completely independently of the course of movement of another heald frame.
  • the movement of each heald frame can be selected individually.
  • the individual elements of the drive 1 are drawn relatively far apart in the figures. In fact, they are however arranged relatively close together.
  • these drive motors 31 are arranged, for example, in accordance with FIG. 4.
  • the individual gearwheels 23, which each cooperate with an eccentric 21, are arranged one behind the other in the axial direction of the axis 22 and each mesh with a gearwheel 24 which is attached to the motor shaft 25 of a drive motor 31.
  • the drive motors 31 are arranged in a star shape around the toothed wheels 23. This makes it possible to arrange the elements of the drive 1 close together. In a corresponding manner, of course, more than four drive motors can also be arranged in a star shape around the toothed wheels 23.
  • the axis 5 shows an embodiment in which all levers 6 are rotatably arranged on the same axis 5.
  • the axis 5 can be displaced by means of the rocker 18, in one end of which the axis 5 is mounted and which is driven according to the axes 5 according to FIG. 2 by means of a drive motor 17.
  • a common axis 5 is thus provided for all levers 6 of several heald frames.
  • FIG. 6 shows a further exemplary embodiment in which the axis 5 can be displaced by means of two identical rockers 18.
  • both rockers 18 must move synchronously, i.e. the eccentricity and the phase of the eccentrics 21 must be the same for both transmission arms 20.
  • This embodiment has the advantage over the embodiment according to FIG. 5 that the axis 5 is displaced parallel to the drive shaft 2 and the axis 19 with a high degree of certainty.
  • the course of movement for all heald frames can only be influenced in the same way by means of the drive motor 17.
  • the crossing height of the Heald frames can be changed by moving axis 5.
  • the transmission arm is not continuously driven by the eccentric 3 and the drive shaft 2.
  • switchable coupling elements are provided between the eccentric 3 and the drive shaft 2, as are known, for example, from US Pat. No. 5,125,434.
  • the transmission arm 4 is only coupled to the drive shaft 2 or separated from the drive shaft 2 at certain times. The separation and connection takes place in the manner known from US Pat. No. 5,125,434 when the heald frame is in the uppermost or lowermost position. If a certain heald frame is separated from the drive shaft 2 and the drive motor 17 is driven, this heald frame in the embodiments according to FIGS. 2, 5 and 6 will nevertheless perform a movement which is caused by the displacement of the axis 5.
  • a heald frame 14, which is separated from the drive shaft 2 can be held in the rest position by stopping the associated drive motor 31.
  • the drive shaft 2 is usually moved inconsistently, for example in such a way that it is rotated by 180 ° and stopped again. Another possibility provides that the drive shaft 2 is rotated back and forth by 180 ° and stopped in between. The respective shutdown is necessary in order to engage or disengage the switchable coupling elements so that the drive shaft 2 can either be connected to the associated lever 6 or separated from it. Because of this stopping, the switchable drives according to US Pat. No. 5,125,434 mostly work irregularly or loudly, since they have to be driven at high speeds and accelerations. This is necessary at high speeds to achieve the weaving machine, since the short standstill of the drive shaft 2 must be compensated for by a movement of the drive shaft 2 at high speeds and accelerations.
  • Such a course of movement is disadvantageous for the heald frames 14 since they are subjected to high accelerations. If the drive motor 17 is driven according to the invention in a suitable manner and thus the axis 5 is shifted in a suitable manner, the course of movement of the heald frames can become quieter, so that it has lower speeds and lower accelerations than the course of movement of the drive shaft 2. This is for the service life the heald frames 14 are advantageous.
  • the eccentric 3 of the drive shaft 2 is connected to the axis 27 of the lever 6 by means of a transmission arm 4.
  • the arm 6A of the lever 6 can cooperate with an eccentric cam which is attached to the drive shaft 2.
  • controllable drive means are electrically controllable drive motors 17 or 31, which are designed, for example, as stepper motors.
  • This version has the advantage that the position, the speed and the acceleration can be controlled very easily.
  • the drive motors 17, 31 and the gears 23, 24 as well as the transmission arm 20 and the eccentric 21 have been replaced by a controllable linear electric motor, for example a linear stepper motor which has two ends, the distance between which is controlled by the electric drive motor can be changed.
  • a controllable linear electric motor for example a linear stepper motor which has two ends, the distance between which is controlled by the electric drive motor can be changed.
  • Such a drive motor can, for example, engage the rocker arm 18 instead of the transmission arm 20 and be arranged in a stationary manner with its other end. By changing the distance between The position of the rocker 18 and thus the position of the axis 5 can be shifted accordingly at the two ends.
  • the drive means consist of controllable hydraulic or pneumatic drive motors or of controllable hydraulic or compressed air cylinders.
  • not all heald frames have to be driven with a drive system according to the invention.
  • the control of the drive means for changing the position of the axis 5 can be set and optimized differently for each fabric to be woven, not only depending on the weft threads to be inserted, but also on the sheds to be formed, the fabric parts to be formed or the course of movement which is to be transmitted from the drive shaft 2 to the heald frames 14.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Feed For Specific Animals (AREA)
  • Fodder In General (AREA)

Abstract

L'invention concerne un système d'entraînement (1) pour une lame (14) de métier mécanique, comportant un excentrique (3) pouvant être entraîné par un arbre primaire (2), un bras de transmission (4) pouvant être entraîné par ledit excentrique (3), ainsi qu'un levier (6) pouvant tourner autour d'un pivot (5), qui est entraîné au moyen du bras de transmission (4) et est relié à la lame (14) par le biais d'éléments intermédiaires (7, 8, 9, 10, 11, 12, 13). Il est prévu que le pivot (5) du levier (6) puisse être déplacé par un dispositif contenant un moteur d'entraînement (17) pilotable.
PCT/EP1998/004164 1997-07-14 1998-07-06 Systeme d'entrainement pour au moins une lame de metier mecanique Ceased WO1999004075A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE9700618 1997-07-14
BE9700618A BE1011281A3 (nl) 1997-07-14 1997-07-14 Aandrijfsysteem voor een weefkader van een weefmachine.

Publications (1)

Publication Number Publication Date
WO1999004075A1 true WO1999004075A1 (fr) 1999-01-28

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Application Number Title Priority Date Filing Date
PCT/EP1998/004164 Ceased WO1999004075A1 (fr) 1997-07-14 1998-07-06 Systeme d'entrainement pour au moins une lame de metier mecanique

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BE (1) BE1011281A3 (fr)
WO (1) WO1999004075A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004081270A1 (fr) * 2003-03-12 2004-09-23 Picanol N.V. Systeme d'entrainement d'un moyen de formation de foule d'un metier mecanique
DE10318811A1 (de) * 2003-04-17 2004-11-04 Picanol N.V. Antrieb für Webschäfte einer Webmaschine
BE1015410A3 (nl) * 2003-03-12 2005-03-01 Picanol Nv Aandrijfsysteem voor een weefmachine.
CN101220540B (zh) * 2007-01-12 2011-11-02 施托布利法韦日公司 凸轮机构,织机及凸轮与凸轮机构滚子的分离方法
DE10318809B4 (de) * 2003-04-17 2017-06-22 Picanol Antrieb für Webschäfte einer Webmaschine
CN106917176A (zh) * 2017-04-21 2017-07-04 江苏友诚数控科技有限公司 一种数控凸轮开口机构

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH626929A5 (en) * 1979-04-19 1981-12-15 Sulzer Ag Heald-frame drive of a weaving machine
US5125434A (en) * 1990-05-18 1992-06-30 S.A. Des Etablissements Staubli (France) Actuation elements for a rotating dobby
EP0525490A1 (fr) * 1991-07-24 1993-02-03 FIMTESSILE FABBRICA ITALIANA MACCHINARIO TESSILE S.p.A. Mécanisme de formation de la foule à cames pour métiers à tisser
EP0675218A1 (fr) * 1994-03-28 1995-10-04 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Méthode et dispositif de commande de la formation de la foule pour métier à tisser

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH626929A5 (en) * 1979-04-19 1981-12-15 Sulzer Ag Heald-frame drive of a weaving machine
US5125434A (en) * 1990-05-18 1992-06-30 S.A. Des Etablissements Staubli (France) Actuation elements for a rotating dobby
EP0525490A1 (fr) * 1991-07-24 1993-02-03 FIMTESSILE FABBRICA ITALIANA MACCHINARIO TESSILE S.p.A. Mécanisme de formation de la foule à cames pour métiers à tisser
EP0675218A1 (fr) * 1994-03-28 1995-10-04 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Méthode et dispositif de commande de la formation de la foule pour métier à tisser

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004081270A1 (fr) * 2003-03-12 2004-09-23 Picanol N.V. Systeme d'entrainement d'un moyen de formation de foule d'un metier mecanique
BE1015410A3 (nl) * 2003-03-12 2005-03-01 Picanol Nv Aandrijfsysteem voor een weefmachine.
DE10318811A1 (de) * 2003-04-17 2004-11-04 Picanol N.V. Antrieb für Webschäfte einer Webmaschine
DE10318809B4 (de) * 2003-04-17 2017-06-22 Picanol Antrieb für Webschäfte einer Webmaschine
CN101220540B (zh) * 2007-01-12 2011-11-02 施托布利法韦日公司 凸轮机构,织机及凸轮与凸轮机构滚子的分离方法
CN106917176A (zh) * 2017-04-21 2017-07-04 江苏友诚数控科技有限公司 一种数控凸轮开口机构

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Publication number Publication date
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