CN104444589A - Yarn feeder with storage drum - Google Patents

Yarn feeder with storage drum Download PDF

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Publication number
CN104444589A
CN104444589A CN201410377253.0A CN201410377253A CN104444589A CN 104444589 A CN104444589 A CN 104444589A CN 201410377253 A CN201410377253 A CN 201410377253A CN 104444589 A CN104444589 A CN 104444589A
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CN
China
Prior art keywords
braking element
cylinder
thread
described braking
carrier
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.)
Granted
Application number
CN201410377253.0A
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Chinese (zh)
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CN104444589B (en
Inventor
Z·彼得罗
C·罗萨里奥
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LGL Electronics SpA
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LGL Electronics SpA
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Publication of CN104444589A publication Critical patent/CN104444589A/en
Application granted granted Critical
Publication of CN104444589B publication Critical patent/CN104444589B/en
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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
    • D03D47/36—Measuring and cutting the weft
    • D03D47/361—Drum-type weft feeding devices
    • D03D47/364—Yarn braking means acting on the drum
    • 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
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
    • D04B15/38—Devices for supplying, feeding, or guiding threads to needles
    • D04B15/48—Thread-feeding devices
    • D04B15/482—Thread-feeding devices comprising a rotatable or stationary intermediate storage drum from which the thread is axially and intermittently pulled off; Devices which can be switched between positive feed and intermittent feed
    • D04B15/484—Yarn braking means acting on the drum

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Tension Adjustment In Filamentary Materials (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)

Abstract

A drum (12) has a plurality of yarn loops (Y) wound thereon, which are adapted to be unwound from a delivery end (12r) of the drum (12) upon request from a downstream machine (L). A thin-walled, hollow braking member (18) has a substantially frustoconical profile yielding elastically in the radial direction, which is biased to coaxially engage the delivery end (12r) of the drum (12) with its inner surface by elastic means (20) under tension between a stationary support (22) and the braking member (18). The braking member (18) is rotatably supported about its axis with respect to the stationary support (22) by a rolling bearing (26) which is operatively interposed between the braking member (18) and the elastic means (20).

Description

With the thread-carrier of storage cylinder
Background technology
So-called " storage " thread-carrier is known, and it is provided with has cylinder, and cylinder is wound with multiple yarn coil, and as requested, yarn coil is suitable for unwinding from downstream machine, and downstream machine is such as weaving loom or knitting machine.
Yarn is released from the reel being arranged in thread-carrier upstream, and by pivot arm or be wrapped on cylinder by rotating this cylinder, such as, pivot arm as shown in EP 0 534 263, rotary drum as US4,068, shown in 807.
Weft brake makes to keep tensioning from the yarn of cylinder.
General weft brake comprises circular braking element, and what this braking element abutted against cylinder sends on edge, and to be lived the yarn of unwinding by frictional force brakes, this yarn is crushed between braking element and cylinder when advancing.
According to EP 0 534 263 cited above, braking element comprises the frustum component of thin wall hollow, its plate be made up of flexible composite material is substantially formed, the composite material of this synthetic material such as PVC, PET, PEI or the such as flimsy material using resin-dipping and so on, springing coaxially biased braking element is pressed against cylinder with its inside face and sends on edge.
According to US 4,068,807 cited above, braking element comprises elastomeric rubber ring, and it axially sends edge with its inside face engaged cylinders.This resilient ring is supported on the larger bottom of rigidity, hollow, frustum component, and frustum component is supported around its axis by bearing again rotationally, then when frustum component be wound around new yarn coil rotate time, it follows cylinder.
The shortcoming of the storage cylinder of known such as above referenced patents is, the such as knot on the yarn of releasing from cylinder or such heaving of tangling, and time between the braking element heaved by being pressed against each other and cylinder, it can cause high peak tension on yarn.Peak tension so can affect the silk screen quality produced, and even causes yarn breakage.
Summary of the invention
Therefore, main purpose of the present invention is to provide the storage thread-carrier with weft brake, its can considerably large reducing effect on yarn from such as knot or tangle and such heave caused peak tension.
Above-mentioned object and other advantage will become clear from following description, its by have claim 1 exemplify the thread-carrier of feature, can reach above-mentioned object and other advantage, and dependent claims set forth other advantage, although their features that to be the present invention secondary.
Accompanying drawing explanation
Now with reference to the accompanying drawings in more detail the present invention is described by means of several preferred, the non-exclusive embodiment shown in limiting examples, in the accompanying drawings:
Fig. 1 is the side direction broken away view according to thread-carrier of the present invention;
Fig. 2 illustrates the enlarged drawing of the thread-carrier parts of Fig. 1 dividually;
Fig. 3 to 5 is three schematic side direction views according to thread-carrier of the present invention, and they are in corresponding three continuous print control steps.
Detailed description of the invention
With reference to above accompanying drawing, store thread-carrier 10 and comprise the cylinder 12 with winding multi-turn yarns Y thereon, multi-turn yarn is suitable for unwinding from downstream machine L as required, and downstream machine is such as weaving loom or knitting machine, and it just schematically illustrates in FIG.
According to the embodiment described in the text by means of example, cylinder 12 axially can rotate under the control of motor M, to withdraw from yarn from the reel R being arranged in thread-carrier upstream, and is wound around on itself.For this purpose, cylinder 12 can be provided with sensor device (not shown) traditionally, with the driven motor M when being stored in the amount of thread on cylinder 12 and being about to use up.
Make the yarns Y of unwinding from cylinder 12 keep tensioning by weft brake 14, weft brake 14 is anchored on arm 16 outstanding from motor case.
In a per se known way, weft brake 14 comprises the braking element 18 with frustum profile of thin wall hollow, and it is elastic buckling radially.Preferably, the plate that braking element 18 is made up of the synthetic material that such as PVC is such is formed, and its thickness is in the scope of 0.1 to 0.5mm.Alternatively, the synthetic material that such as PET, PEI are different like that can be used, or the composite material of the such as flimsy material using resin-dipping and so on.In any case, for the reason that will will discuss hereinafter, preferably use the material of modulus of elasticity in 1 to 4Gpa scope, the moment of inertia of braking element is at 200 to 2000gmm 2in scope.
It is special that with reference to Fig. 2, braking element 18 is biased, to be made the delivery end 12r of cylinder 12 engage with the inside face of this component coaxially by springing, and springing tensioning between the ring-shaped bearing piece 22 be connected on arm 16 and the ring 24 that carry braking element 18.In a per se known way, ring-shaped bearing piece 22 is connected on arm 16 by screw mechanism (not shown), this screw mechanism is received in arm 16, and allows adjusting knob 25 (Fig. 1) to adjust braking element 18 to act on pressure on cylinder 12.
In the present embodiment, springing is made up of the spider-like assembly of coil spring 20, and helical spring inner 20a anchors on ring 24, and its outer end 20b anchors on ring-shaped bearing piece 22.
According to the present invention, braking element 18 is supported around its axis relative to ring-shaped bearing piece 22 rotationally by antifriction-bearing box 26, and antifriction-bearing box 26 is operationally arranged between braking element 18 and coil spring 20.
Advantageously, the bearing with low friction of rolling and low inertia is used.
Specifically, braking element 18 is contained in the seat 24a of ring 24, and is connected to antifriction-bearing box 26 coaxially by hollow, flaring supporting member 28.
The supporting member 28 of hollow has cylinder-shaped end 28a, and the inner ring 26a of bearing 26 is fitted on the 28a of this end.The pipe 28b highlighted from cylinder-shaped end 28a has the divergence profile of flare.Pipe 28b ends at the circular groove 30 of open front, and the smaller diameter end 18a of braking element 18 engages this circular groove 30.
Specifically, the cylindrical projection 18c extended from the smaller diameter end 18a of braking element 18 is fitted into the cylindrical surface 30a of the axis of circular groove 30 slidably.Braking element 18 is axially sandwiched between annular ridge 32 and O shape ring 34, this annular ridge 32 rises along the inward flange of circular groove 30 and engages the inside face of braking element 18, and O shape ring 34 is received within and surrounds in the respective annular seat 36 of circular groove 30, and engage the outside face of braking element.
In operation, according to the needs from downstream machine L, yarn unwinding from cylinder 12, and be crushed between cylinder 12 and braking element 18 while advancing, thus, accept braking maneuver by the friction force from them, this braking maneuver makes yarn keep tensioning slightly.
In the process of delivery yarn, cylinder 12 is termly with speed omega 1rotate, to be wound around thereon by new yarn, this yarn is released from reel.When the drum turns, braking element 18 by friction force with identical speed omega 2=ω 1also rotated by driving.
Having in the situation heaved, be such as wrapped in the knot on the yarn on cylinder 12 or entanglement, the action as shown in Figures 4 and 5 of this system.
When heaving the contact area that (such as, knot K) arrives between cylinder 12 and braking element 18, the rotation of braking element 18 is braked (ω immediately 1< ω 2), because yarn is relative to the rotation direction unwinding in opposite direction of cylinder 12 and braking element 18.The low inertia of braking element 18 ensure that this rapid reaction.Therefore, the yarns Y be wrapped on the cylinder 12 of braking element 18 upstream easily relaxes (Fig. 4), and the yarn in braking element 18 downstream keeps tensioning.This difference of the tensioning of braking element 18 upstream and downstream contributes to knot K and passes through below braking element, slows down peak tension simultaneously; Braking element 18 is with cylinder 12 and then start with identical speed omega 2=ω 1rotate (Fig. 5).
In other words, the surrender of braking element 18, namely, its in response in yarns Y to be crushed between cylinder and braking element when advancing any heaves produced tangential thrust and make the ability of axial rotation relative to cylinder 12, it has and slows down any effect heaving impact to braking element, thus, limit on yarn and occur excessive peak tension.
Technical personnel will recognize that in the art, even if at cylinder 12 and braking element therefore 18 not when moving, also can reach this result.In this case, when knot K arrives the contact area between cylinder 12 and braking element 18, in response to the tangential thrust of knot K effect, the direction along unwinding yarn turns over the several years to braking element 18, until knot K is by below braking element 18.Therefore, the program is also applicable to the situation of such thread-carrier, and wherein, yarn is not loaded by rotary drum, but is wrapped on cylinder by pivot arm.
When two parts are placed in contact time, braking element 18 accurately ensure that uniform brake action from the ability of centering relative to cylinder 12.First should be because braking element 18 is flexibly bearing on spring from centering ability; In addition, by braking element 18, the system be connected in tubaeform supporting 28 further improves this ability.In fact, will recognize that as technical personnel in the art, this locking system is not perfect rigidity, because braking element 18 is resisted against O shape ring 34 from outer abutment, this O shape ring is made up of elastic buckling material traditionally.This to braking element 18 provide its relative to cylinder 12 from centering motion in further degree of freedom.In addition, braking element contributes to any heaving by drg relative to the elastic buckling of radial deformation, and braking element relative to cylinder from centering.Therefore, braking element should be foreclosed, although this braking element have hollow, frustum profile, due to the modulus of elasticity of the thickness and/or material that manufacture the material of this braking element, it gives the response of rigidity substantially to radial deformation.
Be described the preferred embodiments of the present invention, but certain technical personnel in the art, within the scope of claims, can make many changes.Such as, for the above embodiments, the pressure that braking element acts on cylinder manually adjusts by screw mechanism.Certainly, can provide automatic adjustment system, it controls braking element 18 by feedback control loop and acts on pressure on cylinder 12, to be stabilized in predetermined value by yarn tension as traditional mode with this.In addition, carry the springing of braking element, can construct relative to described herein and graphic different mode.Such as, can use elastic threads and spring, the two ends of spring anchor on ring-shaped bearing, and hook in inner ring at direct region place.

Claims (6)

1. a thread-carrier comprises:
Have the cylinder (12) of winding multi-turn yarn (Y) thereon, described multi-turn yarn is suitable for needs according to downstream machine (L) and from delivery end (12r) unwinding of cylinder (12), and
The braking element (18) of thin-walled, hollow, described braking element has the profile of the roughly frustum of radially elastic buckling, and be biased to its inside face with the described delivery end (12r) of described cylinder (12) by springing (20) and engage coaxially, described springing keeps tensioning between static supporting member (22) and described braking element (18)
It is characterized in that,
Described braking element (18) is supported around its axis relative to described static supporting member (22) rotationally by antifriction-bearing box (26), and antifriction-bearing box (26) is operationally inserted between described braking element (18) and described springing (20).
2. thread-carrier as claimed in claim 1, it is characterized in that, described braking element (18) is connected to the inner ring (26a) of described antifriction-bearing box (26) by hollow support (28), and described braking element (18) is abutted against in described hollow support (28) to ground by the annulate shaft be made up of the material (34) of elastic buckling.
3. thread-carrier as claimed in claim 2, it is characterized in that, described braking element (18) has the cylindrical prodger (18c) of hollow, described cylindrical prodger axially highlights from the end (18a) of the small diameter of described braking element, and be fitted on the axial circular cylindrical surface (30a) of described hollow support (28) slidably, described braking element (18) is axially clamped in the described ring be made up of the material of elastic buckling (34) and rises from described axial circular cylindrical surface (30a) and engage between the annular ridge of the inside face of described braking element (18).
4. thread-carrier as claimed any one in claims 1 to 3, it is characterized in that, described braking element (18) is made up of synthetic material plate, and the thickness of synthetic material is in the scope of 0.1 to 0.5mm.
5. the thread-carrier according to any one of Claims 1-4, is characterized in that, the modulus of elasticity that the material of described braking element (18) has is in the scope of 1 to 4Gpa.
6. the thread-carrier according to any one of claim 1 to 5, is characterized in that, the moment of inertia that described braking element (18) has is at 200 to 2000gmm 2scope in.
CN201410377253.0A 2013-09-25 2014-08-01 Yarn guide with storage cylinder Active CN104444589B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000769A ITTO20130769A1 (en) 2013-09-25 2013-09-25 YARN FEEDER WITH ACCUMULATION DRUM.
ITTO2013A000769 2013-09-25

Publications (2)

Publication Number Publication Date
CN104444589A true CN104444589A (en) 2015-03-25
CN104444589B CN104444589B (en) 2019-10-22

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CN201410377253.0A Active CN104444589B (en) 2013-09-25 2014-08-01 Yarn guide with storage cylinder

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EP (1) EP2853626B1 (en)
CN (1) CN104444589B (en)
IT (1) ITTO20130769A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107043042A (en) * 2017-03-16 2017-08-15 路佃泉 A kind of reeled yarn continuously unwinds support meanss

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4068807A (en) * 1975-09-25 1978-01-17 Aktiebolaget Iro Thread supply device
US4079759A (en) * 1974-08-14 1978-03-21 Zbrojovka Vsetin, Narodni Podnik Apparatus for measuring and adjusting the length of a continuously delivered weft thread
EP0584099B1 (en) * 1991-05-03 1995-09-20 Giuseppe Vischiani Weft supplier for shuttleless looms
EP0826619A1 (en) * 1996-09-03 1998-03-04 L.G.L. Electronics S.p.A. Quick-release retainer for the brake support of weft feeders for textile machines
CN1094108C (en) * 1996-11-27 2002-11-13 Iro有限公司 Yarn feeding device with yarn brake device
CN103184650A (en) * 2011-12-28 2013-07-03 爱吉尔电子股份公司 Yarn feeder provided with a stationary drum and with a controlled, weft-braking device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH547881A (en) * 1972-10-16 1974-04-11 Zbrojovka Vsetin Np Continuous weft measuring device - esp. for shuttleless looms adjusting length accurately by varying angular winding speed on measuring drum
US5316051A (en) 1991-09-20 1994-05-31 L.G.L. Electronics S.P.A. Self-adjusting thread braking device for weft feeder units

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4079759A (en) * 1974-08-14 1978-03-21 Zbrojovka Vsetin, Narodni Podnik Apparatus for measuring and adjusting the length of a continuously delivered weft thread
US4068807A (en) * 1975-09-25 1978-01-17 Aktiebolaget Iro Thread supply device
EP0584099B1 (en) * 1991-05-03 1995-09-20 Giuseppe Vischiani Weft supplier for shuttleless looms
EP0826619A1 (en) * 1996-09-03 1998-03-04 L.G.L. Electronics S.p.A. Quick-release retainer for the brake support of weft feeders for textile machines
CN1094108C (en) * 1996-11-27 2002-11-13 Iro有限公司 Yarn feeding device with yarn brake device
CN103184650A (en) * 2011-12-28 2013-07-03 爱吉尔电子股份公司 Yarn feeder provided with a stationary drum and with a controlled, weft-braking device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107043042A (en) * 2017-03-16 2017-08-15 路佃泉 A kind of reeled yarn continuously unwinds support meanss

Also Published As

Publication number Publication date
ITTO20130769A1 (en) 2015-03-26
EP2853626B1 (en) 2019-10-30
EP2853626A1 (en) 2015-04-01
CN104444589B (en) 2019-10-22

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