WO1993023595A1 - Dispositif de regulation de la course du fil entre un conditionnement fixe de fil et un dispositif consommateur de fil a fonctionnement periodique - Google Patents

Dispositif de regulation de la course du fil entre un conditionnement fixe de fil et un dispositif consommateur de fil a fonctionnement periodique Download PDF

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Publication number
WO1993023595A1
WO1993023595A1 PCT/NL1993/000100 NL9300100W WO9323595A1 WO 1993023595 A1 WO1993023595 A1 WO 1993023595A1 NL 9300100 W NL9300100 W NL 9300100W WO 9323595 A1 WO9323595 A1 WO 9323595A1
Authority
WO
WIPO (PCT)
Prior art keywords
yarn
drum
guide arm
speed
winding
Prior art date
Application number
PCT/NL1993/000100
Other languages
English (en)
Inventor
Joannes Josephus Hendricus Marie Gorris
Original Assignee
Te Strake B.V.
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 Te Strake B.V. filed Critical Te Strake B.V.
Priority to JP5520073A priority Critical patent/JPH07500883A/ja
Publication of WO1993023595A1 publication Critical patent/WO1993023595A1/fr

Links

Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/34—Handling the weft between bulk storage and weft-inserting means
    • D03D47/36—Measuring and cutting the weft
    • D03D47/361—Drum-type weft feeding devices

Definitions

  • Title A device for controlling the yarn course between a stationary yarn package and a periodically operating yarn consuming device.
  • the invention relates to a device for controlling the yarn course between a stationary yarn package and a periodically operating yarn c-onsuming device, such as the weft inserting device of a .shuttleless weaving machine, comprising a winding drum adapted to be 5 driven according to a first speed-time diagram and having guide means tArcu-gh wnic-h the yarn from the yarn package may be supplied substan ⁇ tially tangentially at the upstream end of the rotating drum in order to be coiled on the latter and to be subsequently, at the downstream or discharge end of the drum, guided frcm the winding surface of the
  • a device of this type is disclosed in DE-3.142.710 and DE- 3.417.786 and has, in principle, important advantages in comparison with a more classic type of device, with which the yarn is wound, at the upstream end, by a rotating winding arm onto a stationary drum and
  • a yarn clamp is operating at the downstream end to alternately hold the yarn on the winding surface of the drum and release the yarn for withdrawal fran the drum and consumption by the yarn consuming device (weft-inserting device) respectively.
  • 25 length that is initially prepared in the form of a yarn coil on the drum and then released, is taking place in a shortest possible time, such as with the insertion of the prepared yarn length into the shed of a shuttleless weaving machine.
  • a limiting factor is
  • the tension may substantially increase as a result of the abruptly acting yarn clamp. Therefore measures, such as braking of the yarn in certain periods during the consuirption of the yarn, are usually required to avoid yarn breakage. Such measures,
  • a yarn length that is initially prepared in the form of a yarn coil, release in a more flexible manner, viz. by causing the guide arm from the moment at which yarn has to be supplied to the yarn cxarisuming device to retard more or less qi- ckly relative to the c ⁇ riti ⁇ u ⁇ usly rotating drum. Nevertheless this device has found no acceptance so far.
  • the invention aims at to improve the device described in the cpening paragraph so as to make it suitable for an optimal use with devices adapted to consume yarns of different types.
  • this aim is achieved, in that the drum and the guide arm are driven by independent electric motors, wherein at least the electric motor for the guide arm is controllable by a control circuit c ⁇ trprising a programmable circuit, into which in addition to the speed of the yarn consuming device and the periodi ⁇ cally consumed yarn length these parameters may be supplied vfaich are representative of the yarn to be consumed.
  • Possible parameters, which are representative of the yarn to be handled by a weft inserting device of a shuttleless weaving machine are:
  • Possible constant parameters may be: 6. the maximally acceptable accelerations and retardations which are determined by the respective drive motor,
  • EP-A-0243565 (vide the embodiment a ⁇ or- ding to Fig. 1) discloses a device for c ⁇ ntrolling the yarn course between a stationary yarn package and a periodically operating yarn consuming device, which is provided with a winding drum and a guide arm cooperating therewith for controlling the withdrawal of the yarn collected on the drum, and wherein for the winding and for the withdrawal of the yarn vise is made of independently controllable drives.
  • the well-kncwn device is a device of the classic type, i.e. a device having a stationary supported drum arsd a rotary winding arm for winding the yarn thereon.
  • this well-known device requires the use of a yarn brake to determine the termination of the yarn withdrawal.
  • Fig. 1 is a diagrammatic view on a yam-preparing device according to the invention, which is positioned between a yarn package and a weft-inserting device of a shuttleless weaving machine
  • fig. 2 shews a simplified speed profile
  • fig. 3 is a diagram in which a plot of the weft insertion as a function of the time is shown and in which a comparison is made between the insertion with the traditional weft insertion ⁇ trol and that according to the present invention.
  • 1 designates a winding drum which is r ⁇ tatably mounted e.g. about a fixed hollow shaft, in use the drum is driven by an electric motor 2 through a gear 3 at a generally constant speed.
  • Throug a thread guide 4 yarn is drawn off from a yarn package p (not further shewn) and coiled by the rotating drum.
  • 5 designates a guide arm vfaich is located at the free end face of the winding drum 1 and is mounted on the free end of a shaft 6 j ⁇ urnalled in the stationary hollow shaft.
  • the shaft 6 is driven by a second electric motor 7 at a variable speed.
  • the guide arm is rotating at the same speed as the winding drum 1.
  • the speed of the motor 7 decreases, due to which the guide arm 5 is retarded relative to the invariably rotating drum 1 and weft yarn i is supplied through the guiding eyelet 10 to the weft insertion device 11 which e.g. may be fed by pressurized air.
  • the speed of the yarn during the weft insertion is varying along a predetermined pattern, e.g. in accordance, with the simplified trapezoide speed profile shown in fig. 2.
  • this speed profile can be put down in an automatic control circuit for both of the motors 2 and 7, the control proper being more particularly effected by continuously adjusting the low-mass guide arm relative to the drum 1 which rotates at a (substantially) constant speed.
  • the starting and finishing times t ] ⁇ and t 2 respectively of the weft insertion are fixed.
  • the course of the latter is continuously controlled in accordance with the preprogrammed yarn speed profile.
  • the number of yarn windings drawn off from the drum are counted by a number of light source (light sensors 12, 13) provided in the withdrawal path. Furthermore a code disc 8 and 9 respectively is provided on the hollow drum shaft and on the shaft 6 journalled therein.
  • the mutual angular position of these code discs is known at any moment, so that in combination with the counted number of drawn off yarn windings the location of the leading end of the weft thread is knewn at any time during the weft insertion phase and may be compared with the location according to the speed profile.
  • An important detection means therewith is the detection of the pressure or contact between the yarn and the guide arm by means of e.g. a load sensor provided on the guide arm.
  • the diagram shews how the device a ⁇ »rding to the invention enables to avoid the c>ccurance of points (such as the point x) which would result - with the traditional way of controlling - to very high tension picks, by starting with a higher inserting speed and adjusting this speed in a flexible manner.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)

Abstract

Dispositif formant et dévidant une alimentation de fil sous forme de bobine à destination d'un appareil consommateur de fil, tel qu'une machine à tissser pneumatique. Le dispositif se compose d'une bobine animée d'un mouvement de rotation (1) et d'un bras de guidage (5) animé du même mouvement. Conformément à cette invention, la bobine (1) et le bras de guidage (5) sont entraînés par des moteurs électriques (2, 7) commandés indépendamment l'un de l'autre.
PCT/NL1993/000100 1992-05-14 1993-05-14 Dispositif de regulation de la course du fil entre un conditionnement fixe de fil et un dispositif consommateur de fil a fonctionnement periodique WO1993023595A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5520073A JPH07500883A (ja) 1992-05-14 1993-05-14 固定糸パッケージと周期的に作動する糸消費装置の間の糸経路を制御する装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL9200848A NL9200848A (nl) 1992-05-14 1992-05-14 Inrichting voor het sturen van de garenloop tussen een stationair garenpakket en een periodiek werkende garen-verwerkende inrichting.
NL9200848 1992-05-14

Publications (1)

Publication Number Publication Date
WO1993023595A1 true WO1993023595A1 (fr) 1993-11-25

Family

ID=19860793

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NL1993/000100 WO1993023595A1 (fr) 1992-05-14 1993-05-14 Dispositif de regulation de la course du fil entre un conditionnement fixe de fil et un dispositif consommateur de fil a fonctionnement periodique

Country Status (3)

Country Link
JP (1) JPH07500883A (fr)
NL (1) NL9200848A (fr)
WO (1) WO1993023595A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1087045A1 (fr) * 1999-09-27 2001-03-28 Sulzer Textil Ag Procédé pour faire fonctionner le fournisseur d'un métier à tisser
US6371169B1 (en) 1999-09-27 2002-04-16 Sulzer Textil Ag Method for the operation of a thread supplying apparatus of a weaving machine
WO2007096765A1 (fr) * 2006-02-21 2007-08-30 B.T.S.R. International S.P.A. Dispositif ameliore pour amener du fil a une machine textile et procede pour mettre en œuvre cette alimentation

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3142710A1 (de) * 1980-11-17 1982-06-24 Elitex, koncern textilního strojírenství, Liberec "verfahren zur steuerung von schussfaeden und rotationsabmessvorrichtung zur durchfuehrung dieses verfahrens"
DE3417786A1 (de) * 1983-06-15 1984-12-20 Elitex, koncern textilního strojírenství, Reichenberg/Liberec Verfahren und einrichtung zur steuerung eines schussfadens an einer schuetzenlosen webmaschine
EP0243565A1 (fr) * 1986-04-29 1987-11-04 GebràœDer Sulzer Aktiengesellschaft Dispositif d'accumulation de fil de trame pour machine à tisser

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3142710A1 (de) * 1980-11-17 1982-06-24 Elitex, koncern textilního strojírenství, Liberec "verfahren zur steuerung von schussfaeden und rotationsabmessvorrichtung zur durchfuehrung dieses verfahrens"
DE3417786A1 (de) * 1983-06-15 1984-12-20 Elitex, koncern textilního strojírenství, Reichenberg/Liberec Verfahren und einrichtung zur steuerung eines schussfadens an einer schuetzenlosen webmaschine
EP0243565A1 (fr) * 1986-04-29 1987-11-04 GebràœDer Sulzer Aktiengesellschaft Dispositif d'accumulation de fil de trame pour machine à tisser

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1087045A1 (fr) * 1999-09-27 2001-03-28 Sulzer Textil Ag Procédé pour faire fonctionner le fournisseur d'un métier à tisser
US6371169B1 (en) 1999-09-27 2002-04-16 Sulzer Textil Ag Method for the operation of a thread supplying apparatus of a weaving machine
WO2007096765A1 (fr) * 2006-02-21 2007-08-30 B.T.S.R. International S.P.A. Dispositif ameliore pour amener du fil a une machine textile et procede pour mettre en œuvre cette alimentation

Also Published As

Publication number Publication date
JPH07500883A (ja) 1995-01-26
NL9200848A (nl) 1993-12-01

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