EP0333190A2 - Dispositif pour l'alimentation sélective d'un parmi plusieurs fils de trame à une navette à pince - Google Patents

Dispositif pour l'alimentation sélective d'un parmi plusieurs fils de trame à une navette à pince Download PDF

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Publication number
EP0333190A2
EP0333190A2 EP89104729A EP89104729A EP0333190A2 EP 0333190 A2 EP0333190 A2 EP 0333190A2 EP 89104729 A EP89104729 A EP 89104729A EP 89104729 A EP89104729 A EP 89104729A EP 0333190 A2 EP0333190 A2 EP 0333190A2
Authority
EP
European Patent Office
Prior art keywords
ring
projectile
weft thread
clamp
weft
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Withdrawn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
EP89104729A
Other languages
German (de)
English (en)
Other versions
EP0333190A3 (fr
Inventor
Hans Grossmann
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.)
Herman Wangner GmbH and Co KG
Original Assignee
Herman Wangner GmbH and Co KG
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 Herman Wangner GmbH and Co KG filed Critical Herman Wangner GmbH and Co KG
Publication of EP0333190A2 publication Critical patent/EP0333190A2/fr
Publication of EP0333190A3 publication Critical patent/EP0333190A3/fr
Withdrawn legal-status Critical Current

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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
    • D03D47/12—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein single picks of weft thread are inserted, i.e. with shedding between each pick
    • D03D47/125—Weft holding devices
    • 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
    • D03D47/38—Weft pattern mechanisms

Definitions

  • the invention relates to a device for selectively feeding one of several weft threads to a gripper projectile that is moving on a projectile track.
  • the device has a plurality of slidable feeders which hold the individual weft threads ready and have a feeder clamp for holding the respective weft thread.
  • the gripper projectile pulls the weft threads into the shed and then the weft threads are cut off by a knife.
  • the weft thread held ready by a rammer is held by a clamping device and stretched across the projectile track.
  • Such a device is known from EP-A-119,393.
  • the clamping device is stationary and has two closable clamping jaws.
  • the rugs are displaceable in their longitudinal direction and guide the weft thread to be drawn in to the clamping jaws, whereby they extend from below through a knife plate over the projectile track. This can lead to collisions between the gripper projectile and the feeders.
  • a malfunction of the cylinder-piston units at the moment when a thread feeder is in the feed position can damage the thread feeder or the dividing knife.
  • the weft threads are cut by the dividing knife when the thread feeders are in the retracted position.
  • a device for the optional feeding of one of several weft threads to a gripper projectile in which the different weft threads can be brought into a position by sliding thread guides, from which they can be moved by a finger on the edge of a rotatable, arranged next to the projectile track is pivotally attached to be stretched over the path of the gripper projectile.
  • the known weft feed device is positioned directly next to the selvedge so that the thread joint is compensated as much as possible, which would be caused by the loop pulled by the thread feeder and which would mean an interruption of the acceleration.
  • the invention has for its object to provide a device for optionally providing one of several wefts for takeover by the rapier projectile, which works mechanically positively controlled, reliable and largely trouble-free at high working speed (up to min. 160 cycles / min.).
  • the clamping device is a rotating ring which has a ring clamp and which is arranged such that the imaginary extension of the projectile web extends through the ring, the ring clamp taking over the weft thread from a rugs and at it Circular movement spans across the projectile track so that the weft thread can be gripped by the rapier projectile.
  • the basic idea is to avoid that the rug crosses the path of the gripper projectile.
  • the rugs are only pivoted to the transfer position at which the ring clamp then takes over the weft.
  • Such a structure can be mechanically positively controlled in a simple manner.
  • the ring preferably has two ring clamps which are arranged on opposite sides of the ring and offset by 180 °.
  • Each ring clamp has its own
  • the functional sequence of the weft feed device according to the invention is described below, using laterally pivotable feeders which have a tube through which the weft thread runs and which have a feeder clamp firmly connected to the feeder at an axial distance from the outlet end of the tube, which is based on mechanically positively controlled, hydraulic , pneumatically or electrically.
  • the knife consists of two mutually displaceable and superimposed knife blades with a recess open on one side, in which an inserted thread can be sheared off by pushing the two knife blades together.
  • the transfer of the weft thread from the runners to the ring clamp takes place when this is at the top of the circular movement.
  • a pin extends through the ring, which is used for precise positioning and tensioning of the weft thread for the takeover by the gripper projectile.
  • First work step (ring clamp at the transfer position): The ring clamp, which can be designed as a clamping wedge, for example, grips the weft thread stretched between the feed tube and the feed clamp;
  • second step (ring clamp immediately after the transfer position): The ring clamp pulls the weft thread out of the feeder clamp and takes it down.
  • the weft thread After the weft thread is pulled out of the feeder clamp, it opens; third step (ring clamp shortly before the position 180 ° after the transfer position): the ring clamp puts the weft thread in the opening of the knife and in the open feeder clamp; fourth working step (ring clamp 180 ° after the transfer position): the ring clamp moves under the pin, positions and tensions the weft thread between the runners and the pin, so that the weft thread is ready to be pulled off by the gripper projectile; fifth step: The gripper projectile pulls the weft thread into the shed. At the end of the feed, the feed clamp closes again and clamps the weft. Then the weft is cut from the knife; sixth step: the rug is changed.
  • a gripper projectile 5 is shot into the shed in the direction indicated in FIG. 4 by an arrow on a projectile track 2.
  • the part of the projectile web 2 shown in the figures is still part of the impact device, not shown.
  • the projectile web 2 ends in the shed, also not shown.
  • the device for selectively feeding one of several weft threads 1 to the rapier projectile 5 is located between the impact device and the shed.
  • the device has a rotatably mounted ring 6 which carries a ring clamp 8 on one side.
  • the ring 6 lies in a vertical plane and rotates in this plane, which is perpendicular to the direction of movement of the gripper projectile 5.
  • the ring 6 is arranged so that the imaginary extension of the projectile web 2 passes through the interior of the ring 6, so that the gripper projectile 5 flies through the ring 6.
  • a battery of runners 3 is arranged on the edge of the ring 6, only one of these runners 3 being shown in FIGS. 1 to 5.
  • the rugs 3 have a tube 20 through which the weft thread 1 runs.
  • a feed clamp 7 is held at an axial distance from the end of the tube 20 by a laterally offset bracket.
  • the feed clamp 7 has a hardened steel body 18, at the lower end of which there is a V-shaped notch.
  • a spring-loaded spring steel wire 19 lies in this notch, see FIG. 10.
  • the weft thread 1 is clamped between the steel body 18 and the spring steel wire 19. If the feeder clamp 7 is to be opened, then presses a roller 21 in the direction of the arrow (FIG. 9) against the spring steel wire 19.
  • the ratchet clamp 7 closes (FIG. 10).
  • the weft thread 1 is stretched between the tube 20 of the feeder 3 and the V-shaped notch of the feeder clamp 7 and can be gripped by the ring clamp 8 in this area.
  • the feeder clamp 7 is operated in such a way that the weft thread 1 can be inserted again after it has been pulled out of the ring clamp 8.
  • the feeder 3 is displaceable or pivotable into a transfer position in which the end of the tube and the feeder clamp 7 are located near the uppermost point of the ring 6, so that the ring clamp 8 is the piece of weft thread 1 which is between the end of the tube and the feeder clamp 7 is located at the top of their circular movement.
  • the ring clamp 8 can be a pin, wedge or hook protruding from the ring 6 at a flat angle.
  • a knife 4 extends through the ring and has a fixed knife plate 4a and a displaceable knife plate 4b which have a lateral opening 22. A thread inserted into this opening 22 can be sheared off by moving the knife plate 4b.
  • the knife 4 is arranged so that the opening 22 is in the plane of the circular movement of the ring clamp 8, in such a way that the thread gripped by the ring clamp 8 and pulled out of the end of the tube 20 after a rotation of less than 180 ° is inserted into this opening 22.
  • a pin 9 extends from the end of the projectile track 2 through the interior of the ring 6.
  • FIGS 7, 8 and 11 show details of the rotatably mounted ring 6 and the ring clamp 8.
  • the rotatably mounted ring 6 consists of a needle bearing 12 and a gear wheel 13 fastened thereon. It runs on a needle bearing inner ring 10 which is separate from the fixed one Knife plate 4a and held by a finger 23 projecting from the projectile track 2.
  • the guide rings 14 are expediently made of brass.
  • the rotatably mounted ring 6 is driven by a drive gear 15 which engages in the gear 13.
  • the ring clamp 8 consists of a hardened steel body 16 with a V-shaped notch, in which there is a spring-loaded spring steel wire 17, see FIG. 11.
  • the weft thread 1 is clamped between the steel body 16 and the spring steel wire 17.
  • the individual feeders 3 are pivoted into and out of the transfer position by cam mechanisms, as are generally known and are therefore not described in more detail here.
  • the control of the roller 21, which engages the spring steel wire 19 of the feeder clamp 7, is carried out by means of a cam mechanism. Both cam drives are controlled by the main shaft of the weaving machine in time with the other elements of the weaving machine.
  • the feeder 3 and the roller 21 can also be controlled by electrical, pneumatic or similar actuators.
  • the feeder 3 does not change its position at first, and the ring clamp 8 introduces the weft thread 1 into the opening 22 of the knife 4 and into the open feeder clamp 7 in the course of its further circular movement, see FIG. 3.
  • the ring clamp 8 executes a circular movement of approximately 180 °.
  • the longitudinal axis of the feeder 3 runs in the direction of the diameter of the ring 6, so that the ring clamp 8 at its position of 180 ° after the transfer position the weft thread from the end of the tube 20 through the open feeder clamp 7, through the opening 22 of the knife 4 and the pin 9 passes by.
  • the ring clamp 8 tensions and positions the weft thread 1 between the feeder 3 and the pin 9, and in this position the weft thread 1 can be pulled off the looper projectile 5, see FIG. 4.
  • the weft thread 1 removes the weft thread 1 from the Ring clamp 6 pulled out and now drawn into the shed.
  • the feeder clamp 7 is closed and then the thread 1 is sheared off by the knife 4, see FIG. 5.
  • the ring clamp 8 has in the meantime carried out part of the second half of a full circular movement and during this part of the circular movement of the rugs 3 can be changed to pull another weft 1 'into the shed at the next weft.
  • the rug 3 is pivoted away and another rug 3 'is pivoted into the transfer position, see Figure 6.
  • the transfer position is expediently located at the top of the circular movement of the ring clamp 8.
  • a different position e.g. in the figures 1 to 6 shifted clockwise, can be selected to have more time for changing the rugs 3, 3 'available.
  • the ring 6 can also be offset somewhat laterally with respect to the projectile track 2, as long as it is ensured that the gripper projectile 5 can fly through the ring 6 unhindered.
  • a single rotatably mounted ring 6 with a ring clamp 8 is provided.
  • two ring clamps 8 are provided, namely one ring clamp 8 on each of the guide rings 14.
  • the two ring clamps 8 are arranged offset from one another by 180 °.
  • the knife 4 accordingly has two openings 22, one opening 22 each lying within the plane of the circular movement of one of the two ring clamps 8.
  • Figures 12 to 14 show an embodiment with two rotatably mounted rings 6.
  • the storage and the drive are designed as shown in Figures 7 and 8.
  • Each ring 6 has two ring clamps 8, which in turn are each carried by one of the guide rings 14 and are offset from one another by 180 °.
  • the two rings 6 are in turn offset by 90 °, so that the four ring clamps 8 are offset by 90 ° to each other.
  • the finger 23 and the fixed knife plate 4a are extended so that they extend through both rotatable rings 6 and support them.
  • each of the displaceable knife plates 24a, 24b has two cutting edges which face the openings 22.
  • each ring 6 can have one or two ring clamps 8.
  • Each ring clamp 8 can be assigned one or more runners 3.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP19890104729 1988-03-16 1989-03-16 Dispositif pour l'alimentation sélective d'un parmi plusieurs fils de trame à une navette à pince Withdrawn EP0333190A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3808777 1988-03-16
DE3808777A DE3808777A1 (de) 1988-03-16 1988-03-16 Vorrichtung zur wahlweisen zufuehrung eines von mehreren schussfaeden zu einem greiferprojektil

Publications (2)

Publication Number Publication Date
EP0333190A2 true EP0333190A2 (fr) 1989-09-20
EP0333190A3 EP0333190A3 (fr) 1991-12-11

Family

ID=6349878

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890104729 Withdrawn EP0333190A3 (fr) 1988-03-16 1989-03-16 Dispositif pour l'alimentation sélective d'un parmi plusieurs fils de trame à une navette à pince

Country Status (4)

Country Link
US (1) US4915143A (fr)
EP (1) EP0333190A3 (fr)
JP (1) JPH01280049A (fr)
DE (1) DE3808777A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9492927B2 (en) 2009-08-15 2016-11-15 Intuitive Surgical Operations, Inc. Application of force feedback on an input device to urge its operator to command an articulated instrument to a preferred pose
DE102015217356B3 (de) * 2015-09-10 2016-10-20 Lindauer Dornier Gesellschaft Mit Beschränkter Haftung Webmaschine mit einer Vorrichtung sowie Verfahren zum Halten, Zubringen und Eintragen von Schussfäden in ein Webfach
US11299827B2 (en) * 2018-05-17 2022-04-12 James Tolle Nanoconductor smart wearable technology and electronics
DE102018215395B3 (de) 2018-09-11 2019-08-22 Lindauer Dornier Gesellschaft Mit Beschränkter Haftung Webmaschine mit einer schussfadenfarbwahleinrichtung

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB321794A (en) * 1928-10-17 1929-11-21 Oliver Shimwell Improvements relating to shuttleless looms for weaving
DE607853C (de) * 1931-08-14 1935-01-10 Collins & Aikman Corp Vorrichtung zum Abmessen der Schussfadenlaenge an Webstuehlen mit feststehenden Schussspulen
GB1130892A (en) * 1964-10-03 1968-10-16 Weaving Developments Ltd Improvements in or relating to weaving looms
DE1535670B2 (de) * 1965-12-24 1973-01-25 Scheffel, Walter, 8832 Weissenburg Greiferwebmaschine
IT1067353B (it) * 1976-08-03 1985-03-16 Mollica Francesco Telaio del tipo senza navetta con proiettile per il trasporto del filo di trama
GB1566033A (en) * 1977-05-03 1980-04-30 Jaeger E Kg Weft insertion device
US4259996A (en) * 1979-06-29 1981-04-07 Francesco Mollica Shuttleless loom
US4509563A (en) * 1981-03-02 1985-04-09 Mecaniques De Mulhouse Societe Alsacienne De Constructions Device for the insertion of a weft thread into the shed between two lines of warp thread in a weaving loom
DE3373319D1 (en) * 1982-09-02 1987-10-08 Wiele Michel Van De Nv Weft yarn control device for shuttleless looms
DE3304251A1 (de) * 1983-02-08 1984-08-09 Fa. F. Oberdorfer, 7920 Heidenheim Fadenuebergabevorrichtung fuer schusseintrag mittels greiferschuetzen am facheintritt von webstuehlen
DE3315320A1 (de) * 1983-04-27 1984-10-31 Emil Jäger GmbH & Co KG, 4400 Münster Vorrichtung zum eintragen von schussfaeden bei webmaschinen

Also Published As

Publication number Publication date
US4915143A (en) 1990-04-10
DE3808777A1 (de) 1989-10-05
JPH01280049A (ja) 1989-11-10
EP0333190A3 (fr) 1991-12-11

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