CN104444589B - Yarn guide with storage cylinder - Google Patents
Yarn guide with storage cylinder Download PDFInfo
- Publication number
- CN104444589B CN104444589B CN201410377253.0A CN201410377253A CN104444589B CN 104444589 B CN104444589 B CN 104444589B CN 201410377253 A CN201410377253 A CN 201410377253A CN 104444589 B CN104444589 B CN 104444589B
- Authority
- CN
- China
- Prior art keywords
- braking element
- roller
- yarn
- yarn guide
- rolling bearing
- 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.)
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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
Landscapes
- 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
Roller (12) has the multi-turn yarn (Y) of winding on it, and multi-turn yarn is suitable for being unwound according to the needs of downstream machine (L) from the delivery end (12r) of roller (12).Thin-walled, hollow braking element (18) have the shape of the substantially frustum of radially elastic buckling, the braking element is biased to its inner surface by elastic device (20) and is meshed with the delivery end (12r) of roller (12), which keeps tensioning between static supporting member (22) and braking element (18).Braking element (18) is rotatably supported relative to static supporting member (22) around its axis by rolling bearing (26), and rolling bearing (26) is operationally inserted between braking element (18) and elastic device (20).
Description
Background technique
So-called " storage " yarn guide be it is well known, be provided with roller, multiple yarn coils be wound on roller,
According to requiring, yarn coil is suitable for unwinding from downstream machine, all for example weaving looms of downstream machine or knitting machine.
Yarn is released from the reel for being arranged in yarn guide upstream, and can be twined by rotating arm or by rotating the roller
It is wound on roller, for example, rotating arm as shown in EP 0 534 263, rotates roller such as US 4, shown in 068,807.
Weft brake makes the yarn from roller keep tensioning.
General weft brake includes circular braking element, which abuts against the delivering side of roller
On edge, to live the yarn unwound by frictional force brakes, which is crushed between braking element and roller when advancing.
According to EP 0 534 263 cited above, braking element includes the frustum component of thin wall hollow, generally
The plate made of flexible composite material is constituted, and the synthetic material such as PVC, PET, PEI or such as thin being knitted with what resin impregnated
The composite material of object etc, elastic device are coaxially biased braking element and are pressed against on roller delivering edge with its inner surface.
According to US 4 cited above, 068,807, braking element includes the rubber ring of elasticity, axially with table in it
Face engaged cylinders deliver edge.The elastic ring is supported on rigid, hollow, frustum component larger bottom, frustum structure
Part is rotationally supported by bearing around its axis again, then when frustum component be to wind new yarn coil and rotate, it with
From roller.
The shortcomings that storage cylinder of known patent such as referenced above, is, from such as yarn on the yarn released in roller
It heaves as knot or entanglement, when heaving by between braking element and roller against each other, can be caused on yarn
High peak tension.Peak tension so will affect the silk screen quality produced, and even cause yarn breakage.
Summary of the invention
Therefore, the main object of the present invention is to provide the storage yarn guide with weft brake, can be considerably big
It reduces to act on yarn and heaves caused peak tension from such as knot or as tangling.
Above-mentioned purposes and other advantages will be apparent from from the following description, yarn guide through the invention,
It can reach above-mentioned purposes and other advantages.The yarn guide includes: that the motor of the multi-turn yarn with winding on it rotates
Roller, multi-turn yarn is unwound suitable for the needs according to downstream machine and from the delivery end of roller and thin-walled, hollow braking structure
Part, braking element have the shape of the substantially frustum of radially elastic buckling, and are biased to by elastic device
Its inner surface is coaxially engaged with the delivery end of roller, and elastic device keeps opening between static supporting member and braking element
Tightly, braking element is rotatably supported relative to static supporting member around its axis by rolling bearing, and rolling bearing can
Operatively it is inserted between braking element and elastic device, and, rolling bearing has low rolling friction and low inertia, brakes structure
Part is with elasticity modulus in the range of 1 to 4Gpa and has 200 to 2000gmm2In the range of moment of inertia.
Preferably, braking element is connected to the inner ring of rolling bearing by hollow support, braking element passes through by elasticity
Ring made of the material of surrender axially abuts against in hollow support.
Preferably, braking element has a hollow cylindrical prodger, cylindrical prodger is from the smaller straight of braking element
The end of diameter axially highlights, and is slideably fitted on the axial cylindrical surface of hollow support, braking element axis
The ring made of the material of elastic buckling is clamped in ground and the interior table of braking element is risen and engaged from axial cylindrical surface
Between the annular ridge in face.
Preferably, braking element is made of synthetic material plate, the thickness of synthetic material is in the range of 0.1 to 0.5mm.
Detailed description of the invention
Come more in detail now with reference in attached drawing by means of several preferred, non-exclusive embodiments shown in non-limiting example
The present invention carefully is described, in the accompanying drawings:
Fig. 1 is the lateral broken away view of yarn guide according to the present invention；
Fig. 2 dividually shows the enlarged drawing of the yarn guide component of Fig. 1；
Fig. 3 to 5 is three schematical lateral views of yarn guide according to the present invention, they are in corresponding three companies
Continuous operating procedure.
Specific embodiment
Referring to the figures above, storage yarn guide 10 includes the roller 12 of the multi-turn yarns Y with winding on it, loopy yarn
Line is suitable for unwinding from downstream machine L as needed, and downstream machine is such as weaving loom or knitting machine, only shows in Fig. 1
Show to meaning.
According to the embodiment described in the text by means of example, roller 12 can axially rotate under the control of motor M, with
Yarn is withdrawn from from the reel R for being arranged in yarn guide upstream, and is wound on itself.For this purpose, roller 12 can be traditionally
It is provided with sensor device (not shown), with the driven motor M when the amount of thread being stored on roller 12 will be used up.
The yarns Y unwound from roller 12 is set to keep tensioning by weft brake 14, weft brake 14 anchors
From arm 16 outstanding in motor case.
In a per se known way, weft brake 14 includes the braking element with frustum shape of thin wall hollow
18, radially elastic buckling.Preferably, plate structure made of 18 synthetic material as such as PVC of braking element
At thickness is in the range of 0.1 to 0.5mm.Alternatively, the synthetic material or all that can be used such as PET, PEI different like that
The composite material of the flimsy material such as impregnated with resin etc.In any case, for the reason of will hereinafter be discussed, most
Material of the elasticity modulus within the scope of 1 to 4Gpa is used well, and the moment of inertia of braking element is 200 to 2000gmm2Range
It is interior.
Referring specifically to Fig. 2, braking element 18 is biased, to make the delivery end 12r of roller 12 by elastic device coaxially
It is engaged with the inner surface of the component, elastic device is in the ring-shaped bearing piece 22 being connected on arm 16 and carries braking element 18
It is tensioned between ring 24.In a per se known way, ring-shaped bearing piece 22 is connected on arm 16 by screw mechanism (not shown), should
Screw mechanism is received in arm 16, and allows adjusting knob 25 (Fig. 1) to adjust the pressure that braking element 18 acts on roller 12
Power.
In the present embodiment, elastic device is made of the spider-like component of helical spring 20, the inner end 20a anchoring of helical spring
Onto ring 24, outer end 20b is anchored on ring-shaped bearing piece 22.
According to the present invention, braking element 18 can be rotated relative to ring-shaped bearing piece 22 around its axis by rolling bearing 26
Ground is supported, and rolling bearing 26 is operatively disposed between braking element 18 and helical spring 20.
Advantageously, using the bearing with low rolling friction and low inertia.
Specifically, braking element 18 is contained in the seat 24a of ring 24, and same by hollow, tubaeform supporting member 28
Axis it is connected to rolling bearing 26.
There is hollow supporting member 28 cylinder-shaped end 28a, the inner ring 26a of bearing 26 to be fitted on the 28a of the end.From circle
The pipe 28b that cylindricality end 28a highlights has the divergence profile of flare.Pipe 28b terminates at the annular of open front
Slot 30, the smaller diameter end 18a of braking element 18 engage the annular groove 30.
Specifically, it is slidably fitted into from the cylindrical projection 18c that the smaller diameter end 18a of braking element 18 extends
The axial cylindrical surface 30a of annular groove 30.Braking element 18 is axially sandwiched between annular ridge 32 and O-ring 34,
The annular ridge 32 rises along the inward flange of annular groove 30 and engages the inner surface of braking element 18, and O-ring 34 is accepted
In the respective annular seat 36 for surrounding annular groove 30, and engage the outer surface of braking element.
In operation, according to the needs from downstream machine L, yarn is unwound from roller 12, and while advancing
It is crushed between roller 12 and braking element 18, receives braking maneuver and the frictional force from them as a result, the braking is dynamic
Work is tensioned yarn holding slightly.
During being sent yarn, roller 12 is regularly with speed omega1Rotation on it by the winding of new yarn should
Yarn is released from reel.When the drum turns, braking element 18 is by frictional force with identical speed omega2=ω1Also it is driven
And it rotates.
In having the situation heaved, knot or the entanglement being such as wrapped on the yarn on roller 12, the system such as Fig. 4
With acted shown in 5.
When heaving the contact area between (for example, knot K) arrival roller 12 and braking element 18, braking element 18
Rotation is braked (ω immediately1<ω2), because yarn moves back in opposite direction relative to the rotation direction of roller 12 and braking element 18
Around.The low inertia of braking element 18 ensure that the fast reaction.Therefore, the yarn being wrapped on the roller 12 of 18 upstream of braking element
Line Y is easy relaxation (Fig. 4), and the yarn in 18 downstream of braking element keeps tensioning.The tensioning of 18 upstream and downstream of braking element
This difference facilitates knot K and passes through below braking element, while slowing down peak tension；Braking element 18 and roller 12 are then
It starts again at identical speed omega2=ω1It rotates (Fig. 5).
In other words, the surrender of braking element 18, that is, it is in response to being crushed on roller and system when advancing in yarns Y
Any ability heaved generated tangential thrust and make axially to rotate relative to roller 12 between dynamic component, has and slows down
Any effect for heaving the impact to braking element, limits occur excessive peak tension on yarn as a result,.
Man skilled in the art will recognize that, even if not moving in roller 12 and braking element 18 therefore
When, it also can reach the result.In this case, when knot K reaches the contact area between roller 12 and braking element 18, system
Dynamic component 18 turns over the several years along the direction of unwinding yarn in response to the tangential thrust that knot K is acted on, until knot K passes through system
Dynamic 18 lower section of component.Therefore, the program is also applied for the situation of such yarn guide, wherein yarn is not by rotating roller
Load, but be wrapped on roller by rotating arm.
When two parts are placed in be in contact when, braking element 18 accurately guarantees from the ability of centering relative to roller 12
Uniform braking action.Braking element 18 should be firstly because from centering ability to be resiliently supported on spring；In addition, will system
The system that dynamic component 18 is connected in tubaeform bearing 28 further improves the ability.In fact, as in the art
Technical staff will recognize that the locking system is not perfect rigidity, because braking element 18 is resisted against O shape from outer abutment
On ring 34, which is traditionally made of elastic buckling material.This to braking element 18 provide its relative to roller 12 from
Further freedom degree in centering campaign.In addition, braking element facilitates any drum relative to the elastic buckling of radial deformation
It rises through brake and braking element relative to roller from centering.Therefore, braking element should be foreclosed, although should
Braking element has hollow, frustum shape, but the thickness of the material due to manufacturing the braking element and/or the elasticity of material
Modulus gives substantially rigid response to radial deformation.
The preferred embodiment of the present invention is described herein, but certain man skilled in the art is in claim
It, can many changes may be made within the scope of book.For example, braking element acts on the pressure on roller for the above embodiments
It can be manually adjusted by screw mechanism.Certainly, it is possible to provide automatic adjustment system is controlled system by feedback control loop
Dynamic component 18 acts on the pressure on roller 12, to be stablized yarn tension in predetermined value as traditional mode with this.
In addition, carry the elastic device of braking element, can be constructed relative to described herein and diagram different modes.Example
Such as, it elastic string and spring, the both ends of spring can be used to anchor on ring-shaped bearing, and hook at direct region in inner ring
On.
Claims (4)
1. a kind of yarn guide, comprising:
The roller (12) of the motor rotation of multi-turn yarn (Y) with winding on it, the multi-turn yarn are suitable for according to downstream
The needs of machine (L) and from the delivery end of roller (12) (12r) unwind, and
Thin-walled, hollow braking element (18), the braking element have the substantially frustum of radially elastic buckling
Shape, and it is coaxial by the delivery end (12r) that elastic device (20) is biased to its inner surface and the roller (12)
Ground engagement, the elastic device keep tensioning between static supporting member (22) and the braking element (18),
It is characterized in that,
The braking element (18) can be turned relative to the static supporting member (22) around its axis by rolling bearing (26)
Dynamic ground is supported, and rolling bearing (26) is operationally inserted between the braking element (18) and the elastic device (20),
And the rolling bearing (26) has low rolling friction and low inertia, the braking element (18) has the model 1 to 4Gpa
It encloses interior elasticity modulus and has 200 to 2000gmm2In the range of moment of inertia.
2. yarn guide as described in claim 1, which is characterized in that the braking element (18) is connected by hollow support (28)
It is connected to the inner ring (26a) of the rolling bearing (26), the braking element (18) is made up of the material (34) by elastic buckling
Ring axially abut against on the hollow support (28).
3. yarn guide as claimed in claim 2, which is characterized in that the braking element (18) has hollow cylinder prominent
The end (18a) of part (18c), small diameter of the cylinder prodger from the braking element axially highlights, and
It is slideably fitted on the axial cylindrical surface (30a) of the hollow support (28), the braking element (18) is axially
It is clamped in the ring made of the material (34) of elastic buckling and is risen from the axial cylindrical surface (30a) and engage institute
Between the annular ridge for stating the inner surface of braking element (18).
4. yarn guide as claimed any one in claims 1 to 3, which is characterized in that the braking element (18) is by synthesizing material
Flitch piece is made, and the thickness of synthetic material is in the range of 0.1 to 0.5mm.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ITTO2013A000769 | 2013-09-25 | ||
| IT000769A ITTO20130769A1 (en) | 2013-09-25 | 2013-09-25 | YARN FEEDER WITH ACCUMULATION DRUM. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104444589A CN104444589A (en) | 2015-03-25 |
| CN104444589B true CN104444589B (en) | 2019-10-22 |
Family
ID=49447734
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410377253.0A Active CN104444589B (en) | 2013-09-25 | 2014-08-01 | Yarn guide with storage cylinder |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2853626B1 (en) |
| CN (1) | CN104444589B (en) |
| IT (1) | ITTO20130769A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107043042B (en) * | 2017-03-16 | 2023-04-11 | 路佃泉 | Skein backing-off strutting arrangement in succession |
Citations (6)
| 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)
| 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 |
| DE69223575T2 (en) | 1991-09-20 | 1998-04-16 | Lgl Electronics Spa | Self-regulating thread brake for a weft feed device |
-
2013
- 2013-09-25 IT IT000769A patent/ITTO20130769A1/en unknown
-
2014
- 2014-06-18 EP EP14002114.8A patent/EP2853626B1/en active Active
- 2014-08-01 CN CN201410377253.0A patent/CN104444589B/en active Active
Patent Citations (6)
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2853626A1 (en) | 2015-04-01 |
| CN104444589A (en) | 2015-03-25 |
| ITTO20130769A1 (en) | 2015-03-26 |
| EP2853626B1 (en) | 2019-10-30 |
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