WO2010004462A1 - Unité sélecteur de poussoir pour machine à tricoter des textiles - Google Patents

Unité sélecteur de poussoir pour machine à tricoter des textiles Download PDF

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Publication number
WO2010004462A1
WO2010004462A1 PCT/IB2009/052676 IB2009052676W WO2010004462A1 WO 2010004462 A1 WO2010004462 A1 WO 2010004462A1 IB 2009052676 W IB2009052676 W IB 2009052676W WO 2010004462 A1 WO2010004462 A1 WO 2010004462A1
Authority
WO
WIPO (PCT)
Prior art keywords
selector
tips
piezoelectric
laminae
tip
Prior art date
Application number
PCT/IB2009/052676
Other languages
English (en)
Inventor
Franco Caliari
Original Assignee
Sys Tec S.R.L.
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 Sys Tec S.R.L. filed Critical Sys Tec S.R.L.
Priority to CN2009801324039A priority Critical patent/CN102124155B/zh
Publication of WO2010004462A1 publication Critical patent/WO2010004462A1/fr

Links

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
    • D04B15/66—Devices for determining or controlling patterns ; Programme-control arrangements
    • D04B15/68—Devices for determining or controlling patterns ; Programme-control arrangements characterised by the knitting instruments used
    • D04B15/78—Electrical devices
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G2/00—Production of liquid hydrocarbon mixtures of undefined composition from oxides of carbon
    • C10G2/30—Production of liquid hydrocarbon mixtures of undefined composition from oxides of carbon from carbon monoxide with hydrogen
    • C10G2/32—Production of liquid hydrocarbon mixtures of undefined composition from oxides of carbon from carbon monoxide with hydrogen with the use of catalysts

Definitions

  • the present invention regards a jack selector unit for textile knitting machines.
  • the invention concerns the selector units that operate the selection of the jacks by means of the pinch method.
  • the scope of these machines increasingly complex designs are required on the knitwear, and knit a high number of yarns of different colours with each other.
  • the yarns in a knitting machine are processed by a plurality of needles arranged in grooves on a cylinder (in the case of a circular knitting machine) or a bed of needles (in the case of a straight knitting machine) .
  • the needles involved in the work are mechanically selected by matching jacks, also known as Jacks, with a tooth, also known as the tongue heel .
  • the jack appropriately selected, allows the related needle to rise to a specific position of the machine where it hooks a yarn from a reel and placed in position by a thread guide. Subsequently, the needle is lowered by an appropriate cam so that the hooked yarn is knitted with another yarn.
  • each jack is selected from a selector unit comprising a plurality of selector tips or levers superimposed in height or horizontally, to form a comb of selector tips, which act on their respective jack heels by means of actuators. These are controlled, for example, by a computer in which is stored the design or process to be performed.
  • actuators are controlled, for example, by a computer in which is stored the design or process to be performed.
  • every jack is pinched by the selector tip into the groove in which it is housed. This is made to oscillate by means of the actuators between a lowered not interfering position with the heel and a raised interference position, which performs the pinch action of the jack.
  • the piezoelectric laminae are always energised, either by a positive voltage or a negative voltage, so that the related tip selectors are always selectively in either stop position (depending on whether the jack should be selected or not) , compared to a neutral location where the piezoelectric lamina is de- energized.
  • This central neutral position although it never occurs during the machine's operation, is of fundamental importance, since a correct positioning of the tip at rest (i.e. with related lamina de-energized) perfectly in the middle of the related aperture in the front plate ensures the correct contact with the mechanical stop.
  • situations of non-selection or undesired selection may occur, due to a failure to reach a stop position or bouncing on a mechanical stop that is too close.
  • the piezoelectric laminae of a selector unit can be identical to each other and may contain slight deformations, therefore a correct positioning of the selector tip doesn't necessarily mean that the positioning of the piezoelectric lamina will correspond at the same height .
  • each piezoelectric lamina is blocked to a clamp 10 the position of which in relation to the selector unit body may be slightly varied in height (considering the vertical position of the unit) through a respective adjusting screw 11 accessible from outside through a slotted hole 11' .
  • each piezoelectric lamina is energised with a sinusoidal voltage between the two operating voltages of opposite symbols .
  • the proper oscillation of the selector tip is verified. If a tip incorrectly oscillates, the position of the lamina can be varied by means of the adjustment screw, repeating the ion process until the optimal oscillation is obtained.
  • the purpose of the present invention is to propose a selector unit in order to overcome the disadvantages objected to above concerning the current selector units described above.
  • the aim of the present invention is to devise and make available a jack selector unit having a more efficient, practical, fast and more economical to implement calibration system and procedure. [0022] These aims are achieved through a jack selector unit according to claim 1 and a calibration method according to claim 6.
  • FIG. 1 is a schematic view of a selector unit according to the prior art
  • FIG. 2 schematically illustrates part of a selector unit according to the invention
  • FIG. 3 is a schematic horizontal section of the selector unit
  • FIG. 4 and 4a show a side and front view of a centring template of the selector tips.
  • 100 generally indicates a jack selector unit according to the invention.
  • the selector unit 100 includes a plurality of selector tips 20, arranged to form a comb for example.
  • the selector unit 100 is represented with a comb of vertically oriented tips 20, for application on a circular machine for example. In this case, each selector tip 20 extends along a main horizontal direction.
  • the distal end (of a tip or a piezoelectric lamina) is the ends facing the jacks and the proximal end is the opposite end, or furthest from the jacks.
  • Each tip 20 is oscillating around an oscillating pivot 22 between an idle position and a working position in which the pinching of a jack occurs.
  • the two working and idle positions correspond to a lowered or raised position of the tip, or vice versa, depending on the chosen design.
  • Each tip 20 is operatively connected to a respective piezoelectric lamina 30 electrically energised to cause the oscillation of the tip.
  • the lamina 30 has a distal end 31 operatively connected to the selector tip 20, proximal end 32 fixed to the body of the selector unit, and an oscillating pin 33 which extends substantially central to the lamina 30.
  • Each selector tip 20 oscillates around its oscillation pin between the two end positions with respect to a central neutral position, in which the respective piezoelectric lamina is de-energised.
  • the proximal ends 32 of the lamina 30 are coupled by means of releasable clamping suitable for selectively moving between a clamping configuration of said ends for normal use of the selector unit, and a release configuration suitable to permit a free movement of said ends in the plane of oscillation of the tips when the laminae are deactivated.
  • each piezoelectric lamina ends with a shank appendage
  • each lamina 30 terminates with a substantially rod-shaped element 34 that extends back along the main axis of the lamina itself.
  • the shank 34 of the plurality of laminae 30 are interposed between two locking clamps 40, 41, one of which can be moved in relation to the other like a clamp between an open release position, enabling movement of the shanks in the plane of oscillation of the tips during the centring phase of the selector tips in a neutral position, and a closed position in which the shanks 34 are blocked during normal use of the selector unit.
  • a locking clamp 40 is fixed, while the other clamp 41 is movable by means of clamping grub screws 44, such as a pair of grub screws, accessible from the outside.
  • the two clamps 40, 41 extend in the same direction as the tips and the piezoelectric laminae are aligned, for example vertically and substantially throughout the entire height of the selector unit body. [0038] Therefore, at least one locking clamp 41 is movable with respect to another along a direction perpendicular to the plane of oscillation of the tips and the laminae. [0039] According to one embodiment, every selector tip 20 protrudes from the body 7 of the selector unit through an aperture 8 in a front plate 9 fixed to the body 7
  • Each aperture 8 defines the mechanical stop for the oscillation of the tip 20.
  • the centring of the selector tips 20 is made with the inactive piezoelectric laminae geometrically coupling said tips to a reference element .
  • the reference element for the centring includes a centring template 50 applied to the front plate 9, to duplicate it for example, and giving, for each selector tip 20, a seat or aperture 51 suitable to position the tip precisely at the centre of the related aperture 8 in the front plate 9.
  • the centring template 50 also has a plurality of apertures 51, each having a dimension, at least in height, equal to that of the thickness of the selector tips and obtained in a position so as to be perfectly central to the aperture 8 when the centring template 50 is superimposed on the front plate 9.
  • each aperture 51 of the template 50 has a funnel configuration, having a wedge-shaped portion that can also receive an inclined tip 20.
  • geometric coupling means may be advantageously provided between the template and the front plate 9.
  • the template 50 can be provided with pegs or similar protrusions that engage in the corresponding recesses 9' in the front plate, such as holes in the heads of the fixing screws of the plate to the body 7 of the unit, or vice versa.
  • the selector unit 100 and the template 50 can be fitted below with the means of attachment and run over a reference plane, so that at least one of them is movable toward each other.
  • the adjustment of the piezoelectric laminae 30 position is done as follows. [0048] The proximal end 32 of each piezoelectric lamina 30 is released from the body 7 of the selector unit, so that they are free to move in the plane of oscillation of the tips and the laminae (in a vertical plane for example) .
  • the selector tips 20 are forced to move exactly in the middle of the aperture 8 in the front plate, no matter how the proximal ends 32 of laminae are arranged (therefore even askew in relation to a horizontal plane) .
  • the selector tips 20 are then located in a neutral position, exactly in the middle between the two mechanical stops .
  • the clamping takes place by interposing the ends between the clamps of a clamping device in the body of the selector unit .

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Textile Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Knitting Machines (AREA)

Abstract

L'invention concerne une unité (100) sélecteur de poussoir pour machines à tricoter des textiles, qui comprend une pluralité de pointes de sélection (20) oscillant chacune autour d'une broche d'oscillation (22) entre deux positions extrêmes par rapport à une position centrale neutre, et une pluralité de couches piézoélectriques (30), chacune étant reliée exploitable à une pointe de sélection (20) respective et pouvant être actionnée électriquement pour faire osciller ladite pointe (20). L'extrémité fixe (32) de chacune des couches piézoélectriques se termine par un élément tige (34). Les tiges (34) de la pluralité des couches (30) sont interposées entre deux éléments de serrage (40, 41), au moins un (41) de ces éléments étant mobile par rapport à l'autre (40) à la manière d'une pince, entre une position ouverte permettant de centrer les pointes de sélection (20) dans une position neutre, et une position serrée des tiges (34) pendant l'utilisation normale de l'unité (100).
PCT/IB2009/052676 2008-07-09 2009-06-22 Unité sélecteur de poussoir pour machine à tricoter des textiles WO2010004462A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2009801324039A CN102124155B (zh) 2008-07-09 2009-06-22 用于织物编织机的吊综杆选择器单元

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITBS2008A000132 2008-07-09
ITBS2008A000132A IT1390594B1 (it) 2008-07-09 2008-07-09 Gruppo di selezione di sottoaghi di macchine tessili per maglieria

Publications (1)

Publication Number Publication Date
WO2010004462A1 true WO2010004462A1 (fr) 2010-01-14

Family

ID=40451026

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2009/052676 WO2010004462A1 (fr) 2008-07-09 2009-06-22 Unité sélecteur de poussoir pour machine à tricoter des textiles

Country Status (3)

Country Link
CN (1) CN102124155B (fr)
IT (1) IT1390594B1 (fr)
WO (1) WO2010004462A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1018571A1 (fr) * 1998-06-25 2000-07-12 Wac Data Service Kabushiki Kaisha Selecteur d'aiguilles pour machine a tricoter
EP1219741A1 (fr) * 2000-12-27 2002-07-03 Mitsu Tec Co., Ltd. Actionneur dans un dispositif de sélection d'aiguilles pour un métier à tricoter

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0694619B2 (ja) * 1988-10-05 1994-11-24 ワツクデータサービス株式会社 編機用選針装置
CN1088479C (zh) * 1999-02-24 2002-07-31 叶紫彬 一种针织机选针器
WO2002086216A1 (fr) * 2001-04-16 2002-10-31 Wac Data Service Kabushiki Kaisha Detecteur d'aiguille pour machine a tricoter, et doigt de module de selection d'aiguille

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1018571A1 (fr) * 1998-06-25 2000-07-12 Wac Data Service Kabushiki Kaisha Selecteur d'aiguilles pour machine a tricoter
EP1219741A1 (fr) * 2000-12-27 2002-07-03 Mitsu Tec Co., Ltd. Actionneur dans un dispositif de sélection d'aiguilles pour un métier à tricoter

Also Published As

Publication number Publication date
ITBS20080132A1 (it) 2010-01-10
CN102124155B (zh) 2012-07-04
IT1390594B1 (it) 2011-09-09
CN102124155A (zh) 2011-07-13

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