EP1888445B1 - Fadenliefergerät für greifer- und projektilwebmaschinen - Google Patents

Fadenliefergerät für greifer- und projektilwebmaschinen Download PDF

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Publication number
EP1888445B1
EP1888445B1 EP06742706A EP06742706A EP1888445B1 EP 1888445 B1 EP1888445 B1 EP 1888445B1 EP 06742706 A EP06742706 A EP 06742706A EP 06742706 A EP06742706 A EP 06742706A EP 1888445 B1 EP1888445 B1 EP 1888445B1
Authority
EP
European Patent Office
Prior art keywords
yarn
ring
storage body
bristle tufts
feeding device
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.)
Not-in-force
Application number
EP06742706A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1888445A1 (de
Inventor
Pär JOSEFSSON
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.)
Iro AB
Original Assignee
Iro AB
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 Iro AB filed Critical Iro AB
Publication of EP1888445A1 publication Critical patent/EP1888445A1/de
Application granted granted Critical
Publication of EP1888445B1 publication Critical patent/EP1888445B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • D03D47/34—Handling the weft between bulk storage and weft-inserting means
    • 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
    • D03D47/364—Yarn braking means acting on the drum
    • D03D47/365—Brushes

Definitions

  • the invention relates to a yarn feeding device specified in the preamble of claim 1. Art.
  • the brush ring is placed so that the bristle tufts contact the rounded withdrawal end of the storage body of the arranged to the downstream of the trigger eye, controllable yarn brake to produce a predetermined, lowest possible base yarn tension and to lead the withdrawn yarn at the discharge end. Due to the position of the brush ring at the discharge end, a relatively large axial distance exists between the yarn supply on the surface of the storage body and the bristle tufts. Since the thread withdrawal takes place intermittently in gripper or projectile weaving machines and with very widely varying thread speed, considerable centrifugal forces occasionally act on the thread in the thread path from the thread supply to below the bristle tufts, leading to the known undesirable balloon effect.
  • the thread is lifted from the surface of the storage body and forms a freely spiraling in the space spiral.
  • the extent of which depends on the instantaneous speed and / or the thread acceleration and the relative axial position of the foremost border of the thread supply significant kinetic energy is stored in the thread, which generates an additional, significant thread tension, which is between the bristle tufts and the Triggered yarn tension superimposed.
  • the bristle tufts reaching inwards beyond the withdrawal end reinforce even the balloon effect occurring upstream of the brush ring.
  • the deflection of the thread at the discharge end and further downstream in the withdrawal eye is carried out with friction, which increases with an exponential function of the deflection angle and, surprisingly, even with the thread tension.
  • the tension caused by the balloon effect also varies, which is amplified in the deflection points at the withdrawal end and in the withdrawal eye, so that it is difficult to generate with the controllable thread brake a special thread tension profile, such as it is required when entering into rapier or projectile weaving machines (eg a typical heart-shaped curve).
  • a known yarn feeding device ( Fig. 1 ), the controllable yarn brake on a part carried by the nose of the storage body and a stationary mounted, also the trigger eye defining part.
  • the two parts act magnetically, and supported by spring force, together.
  • a brush ring is placed on the storage body in the discharge end thereof, which contacts the storage body and holds the thread at its peripheral withdrawal movement at the discharge end.
  • the braking effect generated by the controllable thread brake is controlled by the exponential function of the deflection angle and by the controllable thread brake Thread tension profile varies falsified, ie, the stronger, the higher the current thread tension is set.
  • the invention has for its object to provide a yarn feeding device of the type mentioned, which allows a perfect yarn control with the lowest possible and largely constant yarn tension to the controllable yarn brake, and avoids a varying distorting friction influence on the generated by the controllable yarn brake braking effect, ie leaves the thread tension profile generated by the controllable thread brake unadulterated.
  • the brush ring has a double function in the yarn feeding device.
  • the brush ring generates thanks to the predetermined contact pressure a very low and, above all, largely constant yarn base tension, which permanently guides the thread at the discharge end, before it enters the draw-off eye and placed in the downstream, controllable yarn brake. Because of the positioning of the bristle tufts on the cylindrical surface area of the storage body, the brush ring simultaneously forms a balloon breaker that minimizes or eliminates the balloon effect, so that no appreciable voltage fluctuations due to a balloon effect are produced.
  • the brush ring provides a clean thread control, since it acts on the same diameter, on which the thread from the thread supply dissolves, and also relatively close to the front limit of the thread supply, so that the thread section leaving thread section is almost not left to itself and hardly can create a balloon effect.
  • the thread nestles advantageous to the storage body. Since the yarn is deflected at the discharge end and in the withdrawal eye with the low and substantially constant yarn base tension, the exponential influence of the deflection angle only plays a negligible role.
  • the yarn is thus supplied to the controllable yarn brake with largely constant and low yarn tension, so that the controllable yarn brake is better able to generate a desired yarn tension profile during the entry, it being essential that this generated by the controllable yarn brake thread tension profile in the emerging from the controllable yarn brake without deflecting thread is no longer distorted.
  • the contact pressure of the bristle tufts is thereby adapted to the respective processed thread material or thread quality, that the contact force is changed by means of the adjustment without replacing the brush ring.
  • the bristle tufts should form a single row oriented circumferentially along the cylindrical surface area.
  • the adjusting device between the bristle tufts engaging projections, wherein the retaining ring and the projections, relative to each other are rotatable.
  • the projections could engage the bristle tufts.
  • the projections are placed further outside than about the middle between the inner diameter of the retaining ring and the outer diameter of the cylindrical surface portion of the storage body, so that the largest possible free and resilient length of the bristle tufts for thread control remains usable.
  • the projections are arranged on a ring in a housing carrier supported by the ring carrier for the retaining ring, and the ring on the ring carrier, preferably limited, rotatably mounted.
  • the ring carrier positions the brush ring.
  • the relative rotational position between the ring and the retaining ring determines the contact pressure of the bristle tufts.
  • the adjustment is limited so that the bristle tufts can be brought into a position in which they contact the cylindrical surface area almost force-free or force-free.
  • the brush ring is positioned as close as possible to the thread supply.
  • the yarn supply may have different maximum sizes depending on the weaving width and / or on the yarn quality, it is expedient for the brush ring to adjust its axial position relative to the storage body, e.g. via the ring carrier, in the housing extension in the direction of the axis of the storage body is adjustable.
  • a very uniform and low yarn tension can be achieved with bristles of synthetic and / or natural nature.
  • a yarn feeding device F in the Fig. 1 to 3 is intended, for example, for use on rapier or projectile looms.
  • the yarn feeding device F has a housing 1 with a housing extension 2, which extends at a distance from a stationary drum-shaped storage body 3 to beyond its discharge end 4 addition.
  • a winding disk 5 is rotatably supported by a motor, not shown, which includes a winding eye 6 and is rotatable relative to the storage body 3.
  • the storage body 3 may, as shown, be formed as a rod drum and comprise in a stationary part rods and a thread separation generating movable rods in an alternating circumferential arrangement.
  • the cylindrical surface region 7 is formed on the non-movable part of the storage body 3 with a certain axial extent, for example about 5 - 10 mm, and in the circumferential direction continuously.
  • a support 8 is mounted, which contains a storage body 3 coaxial withdrawal eye 9, which is arranged at a distance from the withdrawal end 4 of the storage body.
  • a controllable yarn brake 10 is arranged, which, preferably, can be fixed by means of a holder 13 on the support 8.
  • the controllable thread brake 10 receives control commands i for a drive 11 with which a controlled thread braking action 12 is exerted on the thread to produce a certain thread tension profile.
  • a brush ring B is further arranged, which consists of a retaining ring 14 and inner, elastic bristle tufts 16, which contact the storage body 3 in the cylindrical surface region 7 circumferentially.
  • the retaining ring 14 is arranged on a ring carrier 15, which can be adjustable by means of a carriage 17 in the housing arm 2 parallel to the axial direction of the storage body 3, for example by means of an actuator 18th
  • the processed by the yarn feeding device F yarn Y is inserted at the rear end in the housing 1 and exits through the winding eye 6, in the rotation of it in adjacent turns in a thread supply V on the storage body 3 is wound (only a few turns are indicated).
  • the thread is pulled under the brush ring B and on the cylindrical surface portion 7 and then on the withdrawal end 4 in the take-off eye 9, from which he enters the controllable yarn brake 10 and continues to run linearly from this.
  • the existing between the thread supply V and the take-off eye 9 thread portion S of the yarn Y is deflected through the withdrawal end 4 and 9 in the take-off eye.
  • the brush ring B generates a low and largely constant yarn base tension and also acts as a balloon breaker K, which prevents the formation of a yarn balloon between the yarn supply V and the withdrawal end 4.
  • Fig. 2 illustrates the interaction between the tufts 16, which consist of natural and / or synthetic, flexible bristles, and the cylindrical Obertlächen Society 7 of the storage body 3.
  • an adjusting device D for the bristle tufts 16 is provided relative to the cylindrical surface region 7.
  • the adjusting device D comprises projections 19, for example, tooth-like projections in a regular distribution, which engage between the bristle tufts 16 and make it possible to change the contact pressure or the inner diameter of the bristle tufts 16, which define the bristle tufts 16 relative to the storage body 3.
  • the projections 19 are arranged in a ring 23 in the ring carrier 15, and the ring 23 is rotatably mounted on the ring carrier 15.
  • Connecting and / or clamping elements 20 establish the connection between the ring carrier 15 and the retaining ring 14.
  • the axial position of the brush ring B relative to the storage body 3 can be adjusted by adjusting the carriage 17 in the housing extension 2.
  • Fig. 3 illustrates a rotation limitation (guide slot 21) for the adjustment D for varying the contact pressure of the bristle tufts 16.
  • the bristle tufts 16 are expediently inclined in the unwinding of the thread from the storage body 3. Depending on how far the ring 23 is rotated relative to the ring carrier 15 (eg, within the confines of the guide slot 21), the bristle tufts 16 contact the cylindrical surface area 7 with higher or lower or no contact force.
  • the elements 20 ( Fig. 3 ) hold the retaining ring 14 on the ring carrier 15 and enforce, for example, the guide slots 21. After releasing the elements 20, the ring 23 can be rotated.
  • additional releasable clamping elements 24 (FIG. Fig. 3 ) may be used only for the ring 23 in the guide slots 21 and the retaining ring 14.
  • the ring 23 is rotatable in the ring carrier 15 and optionally has a rotary handle.
  • the clamping elements 24 (or one of them) could, for example, engage with teeth in a toothing of the guide slot in order to be able to adjust the ring 23 sensitively and with a servo effect.
  • the bristle tufts 16 are shown schematically and exaggeratedly relaxed and more cylindrical with rod, finger or tube shapes, although they correspond to those of FIG 4 and 5 , consist of individual thin flexible bristles 22.
  • the bristles 22 of each bristle tufts 16 are anchored in the retaining ring 14, z. B. embedded, clamped or glued, extend inwards and ends free.
  • the bristle tufts 16 can ( Fig. 4 ) in relaxed condition be approximately radially to the retaining ring 14, or the bristle tufts 16 are ( Fig. 5 ) is inclined relative to a radial orientation in the unwinding. They each form a single row in the circumferential direction.
  • the bristles 22 define an inner diameter d2 that is slightly smaller than the outer diameter d1 of the cylindrical surface portion 7, so that the bristle tufts 16 are properly placed on the cylindrical surface portion 7 is elastically bent, possibly only with the edges of the bristles 22, the surface area 7 tangent, and create a contact force (indicated by dashed lines).

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
EP06742706A 2005-06-07 2006-04-26 Fadenliefergerät für greifer- und projektilwebmaschinen Not-in-force EP1888445B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200510026234 DE102005026234A1 (de) 2005-06-07 2005-06-07 Fadenliefergerät für Greifer- und Projektilwebmaschinen
PCT/EP2006/003881 WO2006131173A1 (de) 2005-06-07 2006-04-26 Fadenliefergerät für greifer- und projektilwebmaschinen

Publications (2)

Publication Number Publication Date
EP1888445A1 EP1888445A1 (de) 2008-02-20
EP1888445B1 true EP1888445B1 (de) 2010-04-07

Family

ID=36649615

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06742706A Not-in-force EP1888445B1 (de) 2005-06-07 2006-04-26 Fadenliefergerät für greifer- und projektilwebmaschinen

Country Status (4)

Country Link
EP (1) EP1888445B1 (zh)
CN (1) CN101203447B (zh)
DE (2) DE102005026234A1 (zh)
WO (1) WO2006131173A1 (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105316864A (zh) * 2014-06-10 2016-02-10 蔡秀珠 送纱轮送纱方法及其结构
CN105332151B (zh) * 2015-10-21 2017-11-14 嵊州市中森电子有限公司 一种用于储纬器的纬纱定位装置

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH439161A (de) * 1965-06-25 1967-06-30 Sulzer Ag Webmaschine mit Schussfadenzwischenspeicher
US3995786A (en) * 1975-01-15 1976-12-07 Wesco Industries Corporation Intermediate yarn feeding and control device
DE9111875U1 (de) * 1991-09-23 1993-01-28 Sobrevin Société de brevets industriels-Etablissement, Vaduz Fadenspeicher und Liefervorrichtung mit verstellbarer Borstenausrichtung
IT1260645B (it) * 1993-04-08 1996-04-22 Lgl Electronics Spa Dispositivo di frenatura modulata del filato per apparecchi alimentatori di trama
DE19613055A1 (de) * 1996-04-01 1997-10-02 Iro Ab Axiale Scheibenbremse und Fadenliefergerät mit axialer Scheibenbremse
DE19839272B4 (de) * 1997-09-11 2007-02-01 Iro Sweden Ab Steuerbare Fadenbremse
IT1311244B1 (it) * 1999-10-22 2002-03-04 Lgl Electronics Spa Perfezionamenti ai dispositivi antiballoon per apparecchi alimentatori di trama a telai di tessitura.
IT1319948B1 (it) * 2000-03-10 2003-11-12 Lgl Electronics Spa Dispositivo antiballoon per apparecchi alimentatori di trama a telaidi tessitura.
DE10054103A1 (de) * 2000-10-31 2002-05-08 Iro Patent Ag Baar Fadenliefergerät
NL1022800C1 (nl) * 2003-02-28 2004-08-31 Te Strake Textile B V Draadbehandelingsinrichting.

Also Published As

Publication number Publication date
DE102005026234A1 (de) 2006-12-14
DE502006006644D1 (de) 2010-05-20
CN101203447A (zh) 2008-06-18
CN101203447B (zh) 2011-06-29
EP1888445A1 (de) 2008-02-20
WO2006131173A1 (de) 2006-12-14

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