EP0051050B1 - A brake ring for a yarn processing drum - Google Patents

A brake ring for a yarn processing drum Download PDF

Info

Publication number
EP0051050B1
EP0051050B1 EP19810850070 EP81850070A EP0051050B1 EP 0051050 B1 EP0051050 B1 EP 0051050B1 EP 19810850070 EP19810850070 EP 19810850070 EP 81850070 A EP81850070 A EP 81850070A EP 0051050 B1 EP0051050 B1 EP 0051050B1
Authority
EP
European Patent Office
Prior art keywords
fingers
drum
brake ring
base ring
section
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.)
Expired
Application number
EP19810850070
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0051050A1 (en
Inventor
Arao C/O Kasuga Denki Company Limited Kakinaka
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.)
Kasuga Denki Inc
Original Assignee
Kasuga Denki Inc
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 Kasuga Denki Inc filed Critical Kasuga Denki Inc
Publication of EP0051050A1 publication Critical patent/EP0051050A1/en
Application granted granted Critical
Publication of EP0051050B1 publication Critical patent/EP0051050B1/en
Expired legal-status Critical Current

Links

Images

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
    • D03D47/364—Yarn braking means acting on the drum
    • D03D47/366—Conical
    • 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 present invention relates to a brake ring for a yarn processing drum, and more particularly to a brake ring used for a yarn processing drum such as a weft reservoir and metering drum of a fluid-jet type shuttleless loom on which a weft provisionally wound around the drum is delivered, during picking motion, in the axial direction of the drum while passing through the gap between the drum and the brake ring inserted over the drum.
  • a brake ring used for a yarn processing drum such as a weft reservoir and metering drum of a fluid-jet type shuttleless loom on which a weft provisionally wound around the drum is delivered, during picking motion, in the axial direction of the drum while passing through the gap between the drum and the brake ring inserted over the drum.
  • Brake rings of the above-described type have been widely used in the field of textile industry in order to prevent excessive unwinding of the yarn from the drum, to restrict generation of snarls on the yarn under delivery, and to control the tension of the yarn.
  • a brush-type brake ring is publicly known as a typical excample of such conventional brake rings.
  • This brake ring includes a plastic base ring section having an inner diameter somewhat larger than the outer diameter of the drum for which the brake ring is to be used, and brushes coupled to and juxtaposed along the inner periphery of the base ring section, said brushes having moderate rigidity and elasticity. Further, these brushes extend along an appropriate imaginary conical surface the bottom end of which is defined by the base ring section and top falls on the axial line of the circle defined by the base ring section. The brushes incline in the direction of rotation of the yarn to be unwound from the drum and delivered in the axial direction of the drum. Adjacent brushes overlap one another somewhat in the peripheral direction of the base ring section.
  • the brush-type brake ring of this construction cannot apply sufficient braking force on the yarn delivered from the drum depending on the type of the yarn to be processed. Deficient braking action tends to cause variation in yarn tension and formation of snarls on the yarn.
  • free fluffs flying around the brake ring intrude themselves into the gaps between the brushes and form clogs against smooth passage of the yarn, thereby paralysing the function of the brake ring.
  • attachment of a number of fine brushes to the base ring section requires vast labour and time.
  • a finger-type brake ring has already been proposed, in which rubber fingers are substituted for the brushes.
  • This finger-type brake ring has futher been modified by using plastics as the material.
  • This finger-type plastic brake ring is almost same in construction as the above-described brush-type brake ring, in which plastic fingers are substituted for the brushes and formed monolithically whith the base ring section by plastic moulding.
  • a brake ring of this type is disclosed in FR-A-2 027 851.
  • this finger-type plastic brake ring well removes demerits inherent to the brush-type brake ring, it has its own disadvantage since its braking action is based on the operation of the plasticfingers only.
  • the braking force applied to the yarn by the finger-type plastic brake ring acting is a function of the elasticity of the plastic material and the relationship between the diameter of the imaginary circle defined by the points of the fingers and the outer diameter of the drum for which the brake ring is used. Further, the braking force should be adjusted in accordance with the type of the yarn such as the thickness and the kind of material.
  • the brake ring of this sort is often used for a weft reservoir and metering drum of a fluid-jet type shuttleless loom for tension control of the weft to be picked into the shed.
  • a weaving mill it is very rare to use one type of weft only.
  • the brake ring comprises, in a monlithical construction formed by plastic moulding, a base ring section, a thin supporting wall section and a number of thin elongated fingers.
  • the base ring section has an inner diameter somewhat larger than the outer diameter of a drum over which the brake ring is to be inserted.
  • the supporting wall section extends along the inner periphery of the base ring section and the fingers extend from the fringe of the supporting wall section in a juxtaposed arrangement.
  • the supporting wall section and the fingers extend along a prescribed imaginary conical surface the bottom of which is defined by the inner periphery of the base ring section and top falls on the axial line of the base ring section.
  • the fingers incline in the direction of rotation of the yarn to be unwound from the drum and delivered in the axial direction of the drum. Adjacent fingers overlap somewhat one another in the peripheral direction of the base ring section. Further, the supporting wall section is provided, at positions between adjacent fingers, with cuts at prescribed intervals, which run in the extending direction of the fingers.
  • the brake ring is made up, in a monlithical construction formed by plastic moulding, of a base ring section 1, a thin supporting wall section 2 and a number of thin elongated fingers 3.
  • the base ring section 1 has an inner diameter D somewhat larger than the outer diameter of a drum for which the brake ring is to be used.
  • An imaginary conical surface C is assumed whose bottom is defined by the inner periphery of the base ring section 1 and top P falls on an axial line L of the base ring section 1.
  • the thin supporting wall section 2 extends in axial direction over a prescribed distance from the inner periphery of the base ring section 1 along the above-described imaginary conical surface C.
  • the straight fingers 3 extend from the upper fringe of the supporting wall section 2 whilst being juxtaposed along the periphery of the supporting wall section 2. They also follow the imaginary conical surface C. These fingers 3 extend substantially in parallel to each other and incline in the direction of rotation R of the yarn to be unwound from the drum an delivered in the axial direction of the drum. Adjacent fingers 3 overlap one another in the peripheral direction of the base ring section 1.
  • the points of these fingers 3 in a free state should preferably be on a common plane normal to the above-described axial line L.
  • An imaginary circle defined by these points of the fingers 3 should preferably have its center on the axial line L and the diameter d of such an imaginary circle should be equal to or smaller than the outer diameter of the drum for which the brake ring is to be used.
  • cuts 21 are formed in the supporting wall section 2 at prescribed intervals at positions between adjacent fingers 3, which run in the extending direction of the fingers 3.
  • a cut 21 is provided for every fourth finger 3.
  • the interval, i. e. the number of fingers 3, between adjacent cuts 21 may be varied freely in accordance with requirement in actual process.
  • the points of the fingers 3 are placed in pressure contact with the peripheral surface of the drum whilst leaving an annular gap between the base ring section 1 and the drum, since the diameter d of the imaginary circle defined by the points of the fingers 3 is equal to or smaller than the outer diameter of the drum and the inner diameter of the base ring section 1 is larger than the outer diameter of the drum. Consequently, the yarn delivered through the gap sustains braking action by the brake ring.
  • the magnitude of this braking force is influenced by the elasticity of the plastic material used for the brake ring and the relationship between the diameter d of the imaginary circle defined by the points of the fingers 3 and the outer diameter of the drum.
  • the magnitude of the braking force is significantly influenced by the size of the interval between adjacent cuts 21 in the supporting wall section 2. The larger the interval, the larger the braking force acting on the yarn. That is, the magnitude of the braking force can be freely adjusted by varying the size of the interval between adjacent cuts 21 even when other factors remain constant.
  • the user is able to freely obtain optimum braking force for the yarn to be processed by addding further cuts 21 to the supporting wall section.
  • the thin construction of the supporting wall section enables easy formation of such additional cuts 21.
  • Two type of brake rings of the following design were prepared by plastic moulding, one for yarns of S-twists and the other for yarns of Z-twists. They were opposite in the inclining direction of the fingers.
  • the brake rings were inserted over weft reservoir and metering drums of same type for processing of yarns of different direction of twist.
  • Yarn tension can be deemed to be representative of braking force.
  • the braking force can be adjusted over the range of 5 to 40 g. by changing the size of the interval between adjacent cuts.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP19810850070 1980-10-27 1981-04-16 A brake ring for a yarn processing drum Expired EP0051050B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP153923/80U 1980-10-27
JP15392380U JPS5774992U (enrdf_load_stackoverflow) 1980-10-27 1980-10-27

Publications (2)

Publication Number Publication Date
EP0051050A1 EP0051050A1 (en) 1982-05-05
EP0051050B1 true EP0051050B1 (en) 1984-03-14

Family

ID=15573038

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19810850070 Expired EP0051050B1 (en) 1980-10-27 1981-04-16 A brake ring for a yarn processing drum

Country Status (2)

Country Link
EP (1) EP0051050B1 (enrdf_load_stackoverflow)
JP (1) JPS5774992U (enrdf_load_stackoverflow)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9015048U1 (de) * 1990-11-02 1992-02-27 Sobrevin Société de brevets industriels-Etablissement, Vaduz Fadenliefervorrichtung
IT1258241B (it) * 1992-11-05 1996-02-22 Alimentatore di trama
DE9307967U1 (de) * 1993-05-26 1994-10-06 Palitex Project-Company GmbH, 47804 Krefeld Doppeldraht-Zwirnspindel

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES374971A1 (es) * 1969-01-07 1972-01-16 Joel Rosen Almacenador suministrador para hilos.
DE2163976A1 (de) * 1971-12-22 1973-07-05 Rosen Karl I J Verfahren zum verringern der reibung zwischen einem faden und fadenfuehrungsteilen von textilmaschinen
FR2335440A1 (fr) * 1975-12-15 1977-07-15 Lawson Hemphill Dispositif tendeur de fil

Also Published As

Publication number Publication date
EP0051050A1 (en) 1982-05-05
JPS5774992U (enrdf_load_stackoverflow) 1982-05-08

Similar Documents

Publication Publication Date Title
US5409043A (en) Annular thread braking band for weft feeder
US4303724A (en) Adhesive tapes containing texturized yarns
EP0686128B1 (en) Yarn feeder
US3983761A (en) Garniture belt
KR100434621B1 (ko) 방직기용 급사구
EP0051050B1 (en) A brake ring for a yarn processing drum
EP0252866B1 (en) A yarn feed device for textile machines
EP1243542B1 (en) Self-adjusting braking device for weft feeders
US4160532A (en) Knot hole beam
US4237682A (en) Open-end rotor for a spinning machine
EP0737161B1 (en) Device to control the yarn at the outlet of yarn feeders for looms
US4349161A (en) Thread delivery device with improved thread-storage drum, particularly for sticky yarns
US3089379A (en) Apparatus for making braided cord
EP1232112B1 (en) Yarn supply device
GB2049743A (en) Open end rotor for a spinning machine
US4691743A (en) Method and device for removal of waste slivers in a weaving loom
EP0192916B1 (en) Thread reel
JPH0714467B2 (ja) 液体分離素子
EP0334132B1 (en) Yarn tensioning device
JPS606043Y2 (ja) 綾落ち防止ロ−ラ
KR840000092Y1 (ko) 견직용(일명 이태리 연사기) 콜크드럼
ITTO20000514A1 (it) Perfezionamento al mezzo frenante dei dispositivi di frenatura autoregolante del filato, per apparecchi alimentatori di trama.
US3300160A (en) Thread attaching means for bobbins
JPH0133650Y2 (enrdf_load_stackoverflow)
SU1004497A1 (ru) Покрытие нажимного валика машины пр дильного производства

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): GB IT SE

17P Request for examination filed

Effective date: 19820610

ITF It: translation for a ep patent filed
GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): GB IT SE

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19840331

Year of fee payment: 4

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19890416

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19890417

GBPC Gb: european patent ceased through non-payment of renewal fee
EUG Se: european patent has lapsed

Ref document number: 81850070.4

Effective date: 19900412