EP2027318A1 - Positive feedwheel system with movable thread eye - Google Patents
Positive feedwheel system with movable thread eyeInfo
- Publication number
- EP2027318A1 EP2027318A1 EP06743092A EP06743092A EP2027318A1 EP 2027318 A1 EP2027318 A1 EP 2027318A1 EP 06743092 A EP06743092 A EP 06743092A EP 06743092 A EP06743092 A EP 06743092A EP 2027318 A1 EP2027318 A1 EP 2027318A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- thread
- yarn
- feeding device
- yarn feeding
- feed wheel
- 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
Links
- 238000009940 knitting Methods 0.000 claims description 19
- 238000001514 detection method Methods 0.000 claims description 5
- 238000004804 winding Methods 0.000 description 9
- 239000000919 ceramic Substances 0.000 description 4
- 239000002184 metal Substances 0.000 description 3
- 238000013016 damping Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 210000002105 tongue Anatomy 0.000 description 2
- 230000035508 accumulation Effects 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
-
- 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
Definitions
- the invention relates to a yarn feeding device for the positive, i. quantity-controlled feeding of threads to a thread-using machine, in particular a knitting machine.
- U.S. Patent 3,922,887 Another type of supply is disclosed in U.S. Patent 3,922,887.
- This feeder has a carrier on which a toothed belt pulley is rotatably mounted.
- a driving toothed belt runs over the toothed belt pulley.
- a yarn guide eyelet is provided to guide a yarn onto the pulley.
- the thread guide eyelet is height-adjustable, in order to guide the thread under the toothed belt in a first position, so that it is conveyed without slippage or slip-free.
- the yarn guide loop guides the yarn onto a region of the toothed belt pulley that is not touched by the toothed belt.
- the thread slides on the surface of the pulley so that it is not positively conveyed.
- the device operates in friction mode.
- While movably mounted thread guide means serve at Fritationsfournisseuren thus to switch the thread promotion on and off, it is for positive feeders controlled to direct the thread on the inlet region of the yarn feed wheel, so that a single-layer winding is established.
- the yarn running on the yarn feed wheel then urges the already existing winding axially forwards one turn at a time.
- Thread feeler elements or other movably mounted parts serve to detect a thread break in time, so that the supplied knitting machine can be turned off before the end of the torn thread has run into the machine.
- a positive Fournisseur which has a two-caged yarn feed wheel.
- the cages are inclined relative to each other to effect an advancement of the thread winding.
- so-called memory feeders which have a thread storage drum, from which the thread is drawn off in the axial direction. On the drum, the thread passes through rotation of the drum or by a winding device.
- the yarn feeding device according to the invention is e.g. a positive guide or a memory enthusiast.
- the positive feeder has a yarn delivery wheel, which is wrapped around several times by the yarn to be delivered, so that the supplied amount of yarn corresponds exactly to the revolutions of the yarn feed wheel.
- the thread inlet eyelet is arranged on one side of the yarn feed wheel above a yarn inlet region provided on the yarn feed wheel.
- the yarn inlet region forms a yarn inlet bevel, ie a section in which the diameter of the yarn feed wheel is greatly reduced from an axially upper position to an axially slightly lower position.
- the thread entry area can be regarded as a conical section with a cone angle greater than 120 °.
- an exactly conical or conical structure with a circular cross section it can also have a polygonal cross section and be formed, for example, by individual rods of a cage-like yarn feeding wheel.
- the thread inlet area serves to produce a slow axial traveling movement of the Thread winding during rotation of the yarn feed wheel.
- the memory tour guide has a yarn feed wheel, which may be formed by a closed body or a cage.
- the thread wraps around the yarn feed wheel several times. Before it reaches the yarn feed wheel, it passes through a yarn inlet eye.
- the Fadeneinlauf ⁇ se and the yarn feed wheel are moved relative to each other to produce a winding. The movement is e.g. achieved by a rotation of the yarn feed wheel relative to the thread inlet socket.
- the feed of the yarn package can be effected by the shape of the yarn feed wheel or by a separate feed device.
- the thread entry eye is so far arranged to be movable that it is pivoted by the thread running on the yarn thread in an operating position. If the thread falls away because it breaks or if it hangs very strongly for other reasons, the thread entry eye moves to a different position, which is detected by the detection means and used to generate a corresponding signal.
- the signal may be a switching signal or serve, for example, for signaling the error state and / or for switching off a downstream machine, for example a knitting machine.
- the thread entry eye is preferably held so that it always moves in its movement from the operating position I to a shut-off position II in a vertical plane in which the axis of rotation of the yarn feed wheel is located and which extends radially away from the axis of rotation.
- the thread entry eye remains at least in working position and preferably also in the switch-off position and if possible also in all intermediate positions above the storage area of the yarn delivery wheel.
- a yarn guide eyelet for the controlled guidance of the yarn onto the inlet region of the yarn feed wheel and the yarn feeler lever are provided on the inlet side in front of the yarn feed wheel, which additionally acts rubbing on the yarn.
- the yarn feeler lever and the yarn inlet eyelet are combined to form a movably mounted element, so that in total there is no element rubbing against the thread.
- the movably mounted Fadeneinlau- f ⁇ se is oriented with its axis radially to the axis of rotation of the yarn feed wheel.
- the function is independent of the direction of rotation of the yarn feed wheel.
- the yarn feed wheel of the yarn feeding device according to the invention can be driven both by a motor with changing or constant speeds and by a belt.
- Fadeneinsburgbaum is In principle, the monitoring of the thread tension possible.
- the thread entry eye only serves to monitor the thread breakage, ie the presence of the thread.
- the thread entry eye of the thread against a fixed stop, preferably in a position close to the yarn delivery position held (working position). If the thread breaks, the thread entry eye can move away from the thread feed wheel (shut-off position). In this case, a pivoting movement is preferably carried out.
- the path for the movement of the thread entry eye is preferably chosen such that the thread entry eye is in all end positions and, at least preferably, also in its intermediate positions at or above the thread entry region of the thread delivery wheel. This ensures that the thread, even if the thread inlet eye momentarily pivots out of its operating position, is always properly wound on the yarn feed wheel and there is no overlapping of turns there.
- the Fadeneinvierieri is supported by a pivot lever which is movably mounted at one end and at the other end of the Fadeneinlauferia mounted or formed.
- the pivot lever is preferably pivotable about an axis which is arranged above the upper edge of the yarn feed wheel.
- this axis is preferably arranged at a radial distance to the outer edge of the Fadenunterrads and transverse to the axis of rotation.
- a pivot lever can be provided to guide the thread inlet eye, such as linear guides, parallelogram, leaf spring constructions or the like.
- To monitor the position of the thread inlet eyelet is preferably a sensor device which forms the detection means.
- To the sensor device preferably includes a non-contact sensor, such as a permanent magnet as a donor and a Schutzrohrkomschalter as a sensor element.
- encapsulated contacts or other switching means such as electronic switches are provided.
- Fig. 1 A circular knitting machine with positive feeders
- Fig. 2 A Postitivfournisseur according to an embodiment of the invention in a perspective side view with thread guide element in working position, ⁇
- Fig. 3 The yarn feeding device of Figure 2 with thread guide element in the off position.
- Fig. 4 The thread guide element and the sensor device in a schematic separate perspective view in working position
- Fig. 5 The sensor device of FIG. 4 in the shutdown position.
- a circular knitting machine 1 which includes a knitting cylinder 2 with a plurality of knitting needles not further illustrated. These form knitting points 3, 4 (as well as others) to which thread is to be supplied.
- Serve yarn feeding devices 5, 6, 7, etc. which sit on a above the knitting cylinder 2 held machine ring 8 and extend radially away from this.
- the yarn feeding devices 5, 6, 7, etc. are preferably constructed the same.
- Fig. 2 illustrates an exemplary design based on the yarn feeding device 5.
- Each of these yarn feeding devices has a carrier 9, which is made of metal or, for example, also made of plastic.
- a substantially vertically oriented shaft 10 (see FIGS. 2 and 3) is rotatably mounted.
- the upper end of the shaft 10 carries at least one pulley 11 over which a toothed belt 12, shown schematically in FIG. 1, runs, which drives all or at least some yarn feeding devices together.
- the toothed belt 12 is driven for example by a central drive 13 in the form of an electric motor. It is also possible to provide drive motors instead of the drive by means of the toothed belt 12 on each yarn feeding device 5, 6, 7.
- the yarn feeding device 5 has at the lower end of the shaft 10 to a yarn feed wheel 14, which, as shown in FIG. 3, is wrapped in use of a thread 15 several times. By rotation of the yarn feed wheel 14, the yarn 15 is supplied to the circular knitting machine 1.
- the yarn feeding device 5 is a positive feed, which in all operating conditions by substantially slip-free promotion of the thread 15 characterized by the yarn feed wheel 14.
- the yarn feed wheel 14 has a suitable configuration, in the context of which it has a yarn inlet region 16, a yarn storage region 17 and a yarn outlet region 18.
- the outer periphery of the yarn feed wheel 14 is preferably defined by bars 19 forming a rod cage.
- the corresponding sections of the rods 19 lie on a cone or cone with an opening angle of preferably significantly more than 120 °.
- the relevant sections of the bars 19 are located on a cylinder. or a cone with an opening angle of at most a few degrees.
- the thread outlet region 18 is formed by a flared edge which widens conically downwards. The edge may be defined by a sheet edge, a plastic part, a ceramic part or rod sections.
- the holder 19 has at one end a mounting clamp 20, which serves to support the machine ring 8. At the opposite end a yarn brake 21 is arranged, which is, for example.
- a yarn brake 21 is arranged, which is, for example.
- two ' centrally provided with an opening discs 22, 23 is shown.
- magnets 24, the discs 22, 23 adhere to each other and brake a traversing between them thread 15.
- other biasing means, such as' springs or the like. be provided, which act on the discs 22, 23.
- the discs 22, 23 are movably mounted on a guiding or holding device 25, to which the discs 22, 23 by cross Pin 26 and holder include that connect the pin 26 to the carrier 9.
- the thread running direction 15 in front of the thread brake 21 Fadenleitstoff such as yarn guide eyelets or the like and / or a knot catcher 27 may be arranged, for example, is formed by a thin, slotted sheet through the slot 15 of the thread runs.
- a thread inlet eye 28 is arranged between the yarn brake 21 and the yarn feed wheel 14, which is formed, for example, by an annular, preferably annularly closed, ceramic element 29.
- annular, preferably annularly closed, ceramic element 29 may also be formed as a slotted ring, the ends of each other e.g. overlap. Also, it can be closed with a resilient wire.
- all thread guide element configurations are suitable in which the thread is e.g. can be manually introduced laterally into the interior of the eyelet from which the thread 15 but can not get out automatically.
- the ceramic element 29 is supported by a lever 30, with which it is connected directly or through an intermediate piece 31, for example, made of plastic, metal or other material.
- the lever 30 forms with the intermediate piece 31 and the thread inlet eye 28 a yarn inlet sensor 32, which serves to monitor whether between the yarn brake 21 and the yarn feed wheel 14 thread 15 is present or whether this thread 15 is about broken (cracked).
- the lever 30 is pivotally mounted, as shown in particular in Figure 3, and Figure 4 and Figure 5, which illustrate a pivot axis 33.
- the thread entry eye 28 can be moved on an indicated in Figure 3 arcuate path 34 between at least two positions I and II.
- the lever 30 has for storage of the intermediate piece 31 on a web 30 a, which extends for example parallel to its pivot axis 33.
- the web 30a or the intermediate piece 31 serve to hold the thread 15 approximately at the level E, when the lever 30 is in Abstellposition II. This allows the use of a relatively short lever 30, so that the yarn inlet point on the yarn feed wheel 14 is approximately retained when the lever 30 pivots.
- Position I is shown in FIG.
- Position II is shown in FIG.
- Position I is a working position.
- the lever 30 is applied to a stop 35 which crosses the path of the lever 30.
- the lever 30 is loaded by its own weight or provided in the support 9 biasing means, for example. A spring with little force downwards, so that he has a tendency to pivot in position II. This may be effected, for example, by a second lever arm 36 which is connected to the lever 30 in the center of rotation or at another suitable location and which extends at an angle thereto.
- the lever arm
- the lever arm 36 may be arranged approximately horizontally in position I, so that its weight has the tendency to urge the lever 30, which is inclined in this position at an acute angle to the vertical, into its position II, ie away from the yarn delivery wheel 14.
- the lever arm 36 can also be used to monitor the position of the thread inlet socket 28.
- the transmitter element 39 may, for example, be a permanent magnet.
- the sensor element 40 may be a magnetically sensitive element, such as a protective tube contact switch. This is preferably arranged so that the permanent magnet 39 does not close the circuit in the protective tube contact switch 40 when the thread entry eye 28 is in position I. This is illustrated separately in FIG.
- the permanent magnet 39 is located at an appropriate distance from the sensor element 40, so that the contact tongues 41, 42 of the SchutzrohritchSchalters not or little to wear and have no contact.
- position II according to Figure 5 is the permanent magnet
- the sensor device 38 can also cooperate with other elements, for example, be attached to the lever 30 or the intermediate piece 31. It can also be arranged in the interior of the carrier 9. For example, it is possible, the donor element 39 in the form of the permanent magnet on the lever 30 or the lever arm 36 and the sensor element
- To the yarn feeding device 5 also includes one or two Fadenauslauf ⁇ sen 43, 44, which are arranged with respect to the thread running path behind the yarn feed wheel 14 below the support 4, for example. Following a signal lamp 45. Between the thread outlet eyelets 43, 44 can be a thread outlet Load sensor 46 on the thread 15.
- the thread outlet sensor 46 is formed, for example, by a bracket 9 pivotally mounted on the bracket, which lies with an end or web on the thread 15.
- the yarn feeding device 1 described so far operates as follows:
- the toothed belt 12 rotates the pulley 11 and thus the yarn feed wheel 14.
- the yarn 15 wraps around the yarn feed wheel 14 many times and thus forms a winding 47 (Figure 2) with a number of turns, which may for example be between 5 and 25.
- the yarn feed wheel 14 constantly draws in thread 15 and dispenses threading over the yarn discharge region 18, ie, its lower edge, to the knitting machine.
- the thread 15 is held relatively tight between the yarn brake 21 and the yarn inlet region 16 of the setting of the yarn brake 21 accordingly. He therefore pulls the thread inlet eyelet 1 to the yarn feed wheel 14 zoom, so that the lever 30 abuts against the stop 35. In this position, which can be seen from FIG.
- the thread entry eye 28 is preferably essentially immovable, approximately at the level of the upper edge, ie, the thread entry region 16 of the yarn delivery wheel 14 or somewhat above it.
- the thread 15 is thus guided on the thread inlet region 16, over which it brushes and applies to the existing winding 47, without covering existing layers. He pushes himself between the steep yarn inlet region and the winding 47 and pushes it therefore for each revolution of the yarn feed wheel 14 by a thread thickness axially downwards. If the thread 15 breaks or if, due to another circumstance, the thread tension on the thread inlet side ceases altogether, the state illustrated in FIG. 3 occurs.
- the lever 30 has some tendency to pivot away from the yarn feed wheel 14.
- the eyelet 28 places the arcuate path 34 back, which is preferably completely above a dash-dotted line indicated in Figure 3 level E, which cuts the Fadeneinlaufbe- rich 16 and on which the axis of rotation A of the yarn feed wheel 14 is vertical. At least the two positions I and II are above the plane E.
- the thread guide eyelet 28 regardless of the thread tension and regardless of whether it is in its operating position I, a proper inlet guide of the thread 15 on its way to the thread inlet region 16th and the thread storage area 17 provides.
- thread feeler element and thread guide element the required number of parts is reduced.
- the thread is subject to less friction compared to the prior art.
- the structure is clearer and the threads are easier to thread than before. This in particular because the thread entry eye pivots without a thread in a remote from the yarn feed position, which is easily accessible by hand.
- the yarn feeding device 5 blown off with compressed air, there is usually no inadvertent machine shutdown to be feared.
- the jet of compressed air is directed to the yarn feeding device and to the yarn feed wheel 14, so that the yarn inlet eye is pressed against its stop 35 and thus does not move.
- the suspension of the Fadeneinlauf ⁇ se or the lever 30 is preferably arranged on the underside of the holder 9, so that the side surfaces of the support 9 is smooth and free of wires or other projections. This favors the cleaning of the yarn feeding device 5. Flow accumulations, as they can currently form on existing equipment, are hardly possible.
- the carrier 9 can be formed as outwardly dense housing.
- the thread inlet eye serves as a thread breakage sensor. This is made possible by the thread inlet eye is movably mounted, wherein it performs its function in all its positions, which consists of the thread 15 controlled to the thread inlet area 16 to lead.
- the yarn guide eyelet is the only thread-contacting element between the yarn brake and the yarn feed wheel. The thread guide eye is accessible in the parking position on the front side of the yarn feeding device. The threading of the thread is possible with one hand.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Knitting Machines (AREA)
- Prostheses (AREA)
- Looms (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP2006/005189 WO2007144007A1 (en) | 2006-05-31 | 2006-05-31 | Positive feedwheel system with movable thread eye |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2027318A1 true EP2027318A1 (en) | 2009-02-25 |
EP2027318B1 EP2027318B1 (en) | 2013-02-13 |
Family
ID=37734244
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06743092A Active EP2027318B1 (en) | 2006-05-31 | 2006-06-13 | Positive feedwheel system with movable thread eye |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2027318B1 (en) |
CN (1) | CN101448988B (en) |
TW (1) | TWI337633B (en) |
WO (1) | WO2007144007A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI547611B (en) * | 2013-04-30 | 2016-09-01 | Jen Hui Chen | Guide yarn anti - wrap device |
CN107400977A (en) * | 2016-05-18 | 2017-11-28 | 陈伯霖 | Yarn-feeding device |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102454033A (en) * | 2010-10-29 | 2012-05-16 | 吴江市时代针织有限公司 | Circular yarn traction device for circular knitting machine |
CN102704169B (en) * | 2012-06-08 | 2014-06-04 | 慈溪太阳洲纺织科技有限公司 | Yarn conveying device on knitting machine |
CN104131407B (en) * | 2013-05-03 | 2016-09-14 | 陈仁惠 | Guide anti-winding device |
CN105420906B (en) * | 2014-09-23 | 2018-09-14 | 典洋针织机械股份有限公司 | The yarn storage wheel and its assemble method of yarn-feeding device, yarn-feeding device |
CN106149187B (en) * | 2016-08-03 | 2019-06-21 | 广州美名纺织科技有限公司 | A kind of roller type yarn gripper for circular knitting machine |
CN109281028A (en) * | 2018-09-10 | 2019-01-29 | 江苏德力化纤有限公司 | The equipment and preparation method thereof of the different combined yarn of One-step production POY/FDY tri- |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1262179A (en) * | 1968-10-14 | 1972-02-02 | Rosen Karl I J | Thread storage and delivery device for textile machines |
FR759330A (en) * | 1980-03-03 | 1934-02-01 | Chair | |
CN1003084B (en) * | 1985-04-23 | 1989-01-18 | 古斯塔夫·梅明格 | Yarn-feeding device for circular knitting machine |
DE3627731C1 (en) * | 1986-08-16 | 1988-03-31 | Gustav Memminger | Thread delivery device with electronic thread tension control |
GB9022615D0 (en) * | 1990-10-18 | 1990-11-28 | Triplite Ltd | Yarn feed device |
DE4301507C2 (en) * | 1993-01-21 | 1995-01-26 | Memminger Iro Gmbh | Thread brake |
DE4324412C2 (en) * | 1993-07-21 | 1998-03-19 | Mayer Textilmaschf | Device for adjusting the thread tension |
CN2292817Y (en) * | 1997-05-07 | 1998-09-30 | 宁波太阳实业总公司 | Magnetic tension yarn storage and feed device |
CN2507877Y (en) * | 2001-05-09 | 2002-08-28 | 陈仁惠 | Improvement on random Yarn feeder |
CN1243864C (en) * | 2001-12-06 | 2006-03-01 | 大渝机械(厦门)有限公司 | Laika furnisher |
-
2006
- 2006-05-31 WO PCT/EP2006/005189 patent/WO2007144007A1/en active Application Filing
- 2006-05-31 CN CN200680054763.8A patent/CN101448988B/en active Active
- 2006-06-13 EP EP06743092A patent/EP2027318B1/en active Active
- 2006-11-08 TW TW095141229A patent/TWI337633B/en active
Non-Patent Citations (1)
Title |
---|
See references of WO2007144007A1 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI547611B (en) * | 2013-04-30 | 2016-09-01 | Jen Hui Chen | Guide yarn anti - wrap device |
CN107400977A (en) * | 2016-05-18 | 2017-11-28 | 陈伯霖 | Yarn-feeding device |
Also Published As
Publication number | Publication date |
---|---|
TW200743689A (en) | 2007-12-01 |
CN101448988B (en) | 2013-05-01 |
TWI337633B (en) | 2011-02-21 |
WO2007144007A9 (en) | 2009-03-05 |
WO2007144007A1 (en) | 2007-12-21 |
EP2027318B1 (en) | 2013-02-13 |
WO2007144007A8 (en) | 2009-01-15 |
CN101448988A (en) | 2009-06-03 |
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