WO2010143064A2 - Method and device for automatically measuring the yarn length fed to a rectilinear machine - Google Patents
Method and device for automatically measuring the yarn length fed to a rectilinear machine Download PDFInfo
- Publication number
- WO2010143064A2 WO2010143064A2 PCT/IB2010/001419 IB2010001419W WO2010143064A2 WO 2010143064 A2 WO2010143064 A2 WO 2010143064A2 IB 2010001419 W IB2010001419 W IB 2010001419W WO 2010143064 A2 WO2010143064 A2 WO 2010143064A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- yarn
- carriage
- fed
- during
- operative phase
- Prior art date
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H61/00—Applications of devices for metering predetermined lengths of running material
Definitions
- the present invention relates to a method for automatically evaluating the yarn length absorbed during the production of an article by a rectilinear machine in accordance with the introduction to the main claim.
- the present invention also relates to a device for implementing the method.
- a rectilinear machine is known to comprise a structure provided with at least one feeder for yarn withdrawn from a corresponding package.
- the yarn is carried above a machine needle bed by a carriage translating horizontally along said bed (while the needles move vertically, or perpendicular to the carriage movement direction).
- this carriage raises the needles from a rest position by knitting cams which define the needle raising and lowering "profile" (profiles predefined to enable a knitted fabric article to be produced of the required form and/or pattern).
- the needles hence withdraw the yarn associated with thread guides carried by the carriage, after which they are returned to their rest position in the needle bed such as to knit said yarn together with a yarn previously withdrawn and joined to other adjacent yarns in forming the article during production.
- said cams or knitting triangles
- passive measurement devices for fed yarn are known (roller type) able to measure the effective yarn consumption in the two said phases during article production.
- these devices merely measure the yarn quantity fed during each travel phase, but are unable to determine if the travel is away from or towards the yarn feeder (wherever this latter is positioned relative to the needle bed).
- Constant tension yarn feed devices are also known able not only to maintain the yarn tension constant during its feed to the machine, but also to measure the yarn quantity fed to it. These devices can also determine the fed yarn quantity but not the carriage movement direction along the needle bed.
- An object of the present invention is to provide a method and device for correct and precise determination of the yarn length absorbed (AYL) by the textile machine which represent an improvement over currently known solutions and which enable a constant AYL value to be maintained during the two phases of the machine carriage travel stroke.
- AYL yarn length absorbed
- a further object of the present invention is to provide a method and device for correct and precise machine regulation, this method and device being able to be used identically during the production stage, the method and device being such as to enable the machine to be calibrated within the same configuration as that which it possesses in the production stage, and to enable continuous monitoring of the AYL value during the machine production stages.
- a particular object of the invention is to provide a machine of the stated type, the implementation of which does not require any evaluation and/or synchronization with the operative steps of the textile machine or of the phases of the carriage travel stroke above the machine needle bed.
- Another object is to provide a method of the stated type, the implementation of which does not include a lengthy preliminary step of machine adjustment.
- a further object is to provide a method and device of the stated type, the implementation and/or execution of which enable the textile machine to be simplified in terms of accessories such as electric stops, mechanical recovery members, anti-pull devices or the like.
- a further object is to provide a device which enables said constant AYL measurement and control to be achieved while feeding the yarn at constant tension.
- a particular object of the invention is to provide a device of the stated type which enables the constancy of AYL to be measured and controlled while feeding the yarn at constant tension both in the case in which this tension is the same for both carriage travel strokes and in the case in which the tension is different to compensate the different friction between yarn and thread guide in the two directions, differences due particularly to the two different feed velocities, the friction being a function of the velocity.
- a further particular object is to provide a device and method of the stated type which enable the yarn consumption and the particular phase of the carriage travel stroke (away from or towards the yarn feed device) above the needle bed to be easily determined.
- Another object of the present invention is to provide a method and device according to the invention, the implementation and/or execution of which is totally independent of the machine model (different from constructor to constructor) and type (mechanical or electronic, for example).
- Another object of the present invention is to achieve indirect measurement of the knitting density of the produced article by precisely measuring the AYL during each phase of the carriage travel stroke, obtained with yarn fed at constant tension. This enables said value to be also reproduced on other production machines for the same article, to hence achieve constant quality products obtained by a series of machines, hence ensuring easy reproducibility of the article even on different machines.
- Another object is to highlight, by monitoring the tension and the AYL, any possible quality or irregularity problems during the production process, such as dirt accumulation on the thread guide carried by the carriage, mistaken yarn passage between feed device and machine needles, yarn breakage, loss of machine calibration, etc.
- Figure 1 shows a graph representing the yarn feed velocity during the two phases of the carriage travel stroke of a rectilinear machine above its needle bed
- Figure 2 is a block diagram of part of the method of the invention, and showing the operation of a device according to the invention
- FIG. 3 shows a block diagram of a device according to the invention.
- a rectilinear textile machine comprises, in known manner, a needle bed 1 presenting a plurality of needles 2; above this bed 1 a carriage 3, guided in known manner, moves with rectilinear translational movement to selectively raise the needles from the bed 1 by means of usual knitting cams (not shown).
- the carriage translates horizontally above the bed 1 while the needles 2 of this latter, in moving towards the carriage, come into cooperation with a yarn F fed to the carriage 3 by a yarn feed member 5 positioned on one side of the bed 1.
- the feed member 5 is of the type adapted to feed the yarn F at constant tension and is provided with known means for measuring the fed yarn quantity.
- It is controlled in its operation by a control unit 8 which can form part of the usual textile machine control components or be a unit separate and independent from this latter.
- the unit 8 is connected to a display 10 which can also form part of said components or be totally separate from it.
- the carriage 3 moves (arrow W of Figure 3) along a working path or stroke comprising, in known manner, two phases: the first phase is that of movement away from the feed member 5, while the second is that of movement towards this latter. Because of these phases within which the carriage moves above the needle bed 1 , the feed velocity of the yarn F under constant tension has different values, as can be seen from Figure 1.
- Feed_Velocity Yarn_Velocity+Carriage_Velocity, whereas while the carriage 3 moves towards the feed member 5, the feed velocity is:
- Feed_Velocity Yarn_Velocity-Carriage_Velocity.
- This length value is for example measured by a usual roller cooperating with the yarn and provided with means to measure the AYL (such as Hall sensors, encoders,...) and keyed onto a motor which enables its velocity to be regulated to maintain the tension constant.
- This roller acts as an AYL measurer.
- the algorithm commences (block 32) counting within a temporary counter for the fed yarn quantity.
- the AYL and feed velocity measurement counters are updated (the velocity value could also be mediated to prevent motor velocity variations due to maintaining the tension constant from being able to invalidate the Start and Stop activation threshold of the software counters, in such a manner as to intercept with absolute certainty any exceeding of said threshold (block 34)).
- the velocity returns to zero or to the predefined threshold value or following a command given at a precise moment selected, for example, by self- learning or set by an operator, counting is halted (i.e.
- data memorization is switched over in the subsequent carriage movement phase in blocks 39 and 40 (direction flag).
- data is memorized, to be determined as relative to the opposite movement phase to that just carried out.
- the yarn quantity fed by the carriage during each of its movement phases above the needle bed 1 can be determined; it can also be determined in real time whether the carriage is in the phase of approaching or withdrawing from the member 5 by monitoring the value of the direction flag in the blocks 39 and 40.
- This modification can be carried out both in the case of self-synchronization and in the case in which the direction signal is withdrawn by direct interfacing with the machine (external synchronization), which synchronization can be of hardware or software type (for example via a serial line).
- the feed and measurement device is mounted laterally to the machine, association of the two registers with the movement direction is automatic. In this respect, the greater velocity is associated with that movement direction in which the yarn length (AYL) is measured during the carriage withdrawal from the feeder whereas, vice versa, the lesser velocity is associated with that movement direction in which the yarn length (AYL) is measured during the carriage approach to the feeder. If the feed and measurement device is mounted centrally to the carriage, the device is still able to measure the yarn length (AYL) with absolute accuracy, but is not able to automatically discriminate the carriage direction. The operator must therefore associate the physical significance of the carriage movement direction (movement from let to right or from right to left) with the direction flag present in the device and complemented automatically at each carriage travel stroke.
- Total_AYL Knitted_Yarn_AYL+Working_Needle_Field_AYL Where the individual terms indicate the following quantities: Knitted_Tm_AYL Yarn quantity fed by the machine to produce the knitwork.
- Working_Needle_Field_AYL Yarn quantity which has not been knitted but simply fed to enable the carriage to slide above the working needle bed 1. b) During approach of the carriage 3 to the feeder 5, the fed yarn quantity is the previously stated AYL, the yarn used on the bed 1 not being considered, this having already been fed by the feeder 5 to enable the carriage 3 to reach that end of the bed 1 distant from that where the feeder 5 is present.
- Total_AYL Knitted_Trn_AYL- Working_Needle_Field_AYL
- Working_Needle_Field_AYL Yarn quantity which has not been knitted but simply fed to enable the carriage to slide above the working needle bed 1.
- the absolute consumption value obtained according to the invention can be used for precise and rapid calibration of the textile machine.
- this solution enables the textile machine to be regulated in just a few minutes in contrast to the currently used traditional solution which requires some hours for regulation without even guaranteeing effective regulation quality and precision.
- the present device can be used on any type or model of rectilinear machine, whether electronic (including the very latest generation) or completely mechanical.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Knitting Machines (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES10742552T ES2572228T3 (en) | 2009-06-12 | 2010-06-09 | Procedure and device to automatically determine the length of yarn used in a linear knitting machine |
US13/375,681 US8418506B2 (en) | 2009-06-12 | 2010-06-09 | Method and device for automatically measuring the yarn length fed to a rectilinear machine |
EP10742552.2A EP2440698B8 (en) | 2009-06-12 | 2010-06-09 | Method and device for automatically determining the yarn length used in a linear knitting machine |
JP2012514553A JP5827945B2 (en) | 2009-06-12 | 2010-06-09 | Method and apparatus for automatically measuring yarn length supplied to a linear motion machine |
CN201080025978.3A CN102459734B (en) | 2009-06-12 | 2010-06-09 | Method and device for automatically measuring the yarn length fed to a rectilinear machine |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITMI2009A001037 | 2009-06-12 | ||
ITMI2009A001037A IT1396179B1 (en) | 2009-06-12 | 2009-06-12 | METHOD AND DEVICE FOR AUTOMATICALLY ASSESSING THE WIRE LENGTH ABSORBED BY A STRAIGHT-SIDED MACHINE |
ITMI20090239 ITMI20090239U1 (en) | 2009-07-17 | 2009-07-17 | DEVICE FOR AUTOMATICALLY ASSESSING THE WIRE LENGTH ABSORBED BY A STRAIGHT MACHINE AND AUTOMATICALLY COMPENSATING THE FRICTIONS BY CHANGING THE POWER SUPPLY VOLTAGE |
ITMI2009U000239 | 2009-07-17 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2010143064A2 true WO2010143064A2 (en) | 2010-12-16 |
WO2010143064A3 WO2010143064A3 (en) | 2011-05-05 |
Family
ID=43309289
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IB2010/001419 WO2010143064A2 (en) | 2009-06-12 | 2010-06-09 | Method and device for automatically measuring the yarn length fed to a rectilinear machine |
Country Status (6)
Country | Link |
---|---|
US (1) | US8418506B2 (en) |
EP (1) | EP2440698B8 (en) |
JP (1) | JP5827945B2 (en) |
CN (1) | CN102459734B (en) |
ES (1) | ES2572228T3 (en) |
WO (1) | WO2010143064A2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9377461B2 (en) | 2010-03-08 | 2016-06-28 | Fujifilm Corporation | Monoclonal antibody against necrosis marker ERP29 and use thereof |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2907906B1 (en) * | 2014-02-13 | 2016-05-25 | L.G.L. Electronics S.p.A. | A stock-controlling method for a storage yarn feeder with rotary drum |
ITUB20152769A1 (en) * | 2015-08-03 | 2017-02-03 | Btsr Int Spa | ACCUMULATION WIRE FEEDER WITH BRAKING ORGAN AND INTERCHANGEABLE ELEMENTS |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0950742A2 (en) | 1998-04-17 | 1999-10-20 | B.T.S.R. International S.p.A. | Device for controlling yarn feed to a textile machine and method for controlling the machine operation and production |
Family Cites Families (11)
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DE3627731C1 (en) * | 1986-08-16 | 1988-03-31 | Gustav Memminger | Thread delivery device with electronic thread tension control |
US4744227A (en) * | 1987-06-23 | 1988-05-17 | Whitener Jr Charles G | Pattern monitoring method and apparatus |
IT1243970B (en) | 1990-12-04 | 1994-06-28 | Flavio Barea | METHOD AND DEVICE FOR THE AUTOMATIC CONTROL OF THE QUANTITY OF WIRE SUPPLIED TO A TEXTILE MACHINE OPERATING ON IT, IN A DISCONTINUOUS WAY. |
DE19537325C1 (en) * | 1995-10-06 | 1996-11-28 | Memminger Iro Gmbh | Yarn feed tension control on flat bed knitting machine |
ITMI20020945A1 (en) | 2002-05-03 | 2003-11-03 | Tiziano Barea | METHOD AND DEVICE FOR THE CONSTANT VOLTAGE SUPPLY AND RECOVERY OF A YARN SUPPLIED TO A TEXTILE MACHINE |
WO2004094712A1 (en) * | 2003-04-18 | 2004-11-04 | Shima Seiki Manufacturing Limited | Knitting method and system using elastic yarn |
GB0318271D0 (en) * | 2003-08-05 | 2003-09-10 | Univ Manchester | Improved knitting machines and methods of knitting |
CN101314889A (en) * | 2007-06-02 | 2008-12-03 | 张民 | Yarn length monitoring apparatus for flat machine |
CN201087249Y (en) * | 2007-06-09 | 2008-07-16 | 张民 | Yarn length display equipment of knitting horizontal machine |
US8090467B2 (en) * | 2008-03-07 | 2012-01-03 | Shima Seiki Mfg., Ltd. | Apparatus and method for knitting fabric using elastic yarns |
CN201241245Y (en) * | 2008-08-01 | 2009-05-20 | 冯加林 | Counting device of transverse braiding handpiece transportation load by photoelectric induction |
-
2010
- 2010-06-09 JP JP2012514553A patent/JP5827945B2/en active Active
- 2010-06-09 ES ES10742552T patent/ES2572228T3/en active Active
- 2010-06-09 WO PCT/IB2010/001419 patent/WO2010143064A2/en active Application Filing
- 2010-06-09 CN CN201080025978.3A patent/CN102459734B/en active Active
- 2010-06-09 EP EP10742552.2A patent/EP2440698B8/en active Active
- 2010-06-09 US US13/375,681 patent/US8418506B2/en active Active
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0950742A2 (en) | 1998-04-17 | 1999-10-20 | B.T.S.R. International S.p.A. | Device for controlling yarn feed to a textile machine and method for controlling the machine operation and production |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9377461B2 (en) | 2010-03-08 | 2016-06-28 | Fujifilm Corporation | Monoclonal antibody against necrosis marker ERP29 and use thereof |
Also Published As
Publication number | Publication date |
---|---|
CN102459734A (en) | 2012-05-16 |
US20120285205A1 (en) | 2012-11-15 |
EP2440698A2 (en) | 2012-04-18 |
WO2010143064A3 (en) | 2011-05-05 |
ES2572228T3 (en) | 2016-05-30 |
JP2012529573A (en) | 2012-11-22 |
CN102459734B (en) | 2014-08-13 |
JP5827945B2 (en) | 2015-12-02 |
EP2440698B1 (en) | 2016-02-17 |
US8418506B2 (en) | 2013-04-16 |
EP2440698B8 (en) | 2016-10-12 |
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