EP0249203B1 - Electromagnetic selector device in knitting machine - Google Patents

Electromagnetic selector device in knitting machine Download PDF

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Publication number
EP0249203B1
EP0249203B1 EP87108352A EP87108352A EP0249203B1 EP 0249203 B1 EP0249203 B1 EP 0249203B1 EP 87108352 A EP87108352 A EP 87108352A EP 87108352 A EP87108352 A EP 87108352A EP 0249203 B1 EP0249203 B1 EP 0249203B1
Authority
EP
European Patent Office
Prior art keywords
jack
select
selector
edge
attractive
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.)
Expired - Lifetime
Application number
EP87108352A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0249203A1 (en
Inventor
Hideharu Tobe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HEIKO SEISAKUSHO Ltd
Original Assignee
HEIKO SEISAKUSHO Ltd
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 HEIKO SEISAKUSHO Ltd filed Critical HEIKO SEISAKUSHO Ltd
Publication of EP0249203A1 publication Critical patent/EP0249203A1/en
Application granted granted Critical
Publication of EP0249203B1 publication Critical patent/EP0249203B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B27/00—Details of, or auxiliary devices incorporated in, warp knitting machines, restricted to machines of this kind
    • D04B27/10—Devices for supplying, feeding, or guiding threads to needles
    • D04B27/16—Warp beams; Bearings therefor
    • D04B27/20—Warp beam driving devices
    • D04B27/22—Warp beam driving devices electrically controlled
    • 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
    • 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

Definitions

  • the present invention relates to an electromagnetic needle selected in a knitting machine, particularly a flat knitting machine.
  • a needle selector for selecting a needle to be operated for knitting in which, using electromagnets, when a select jack, etc. associated with the needle to be selected become opposed to one electromagnet, the electromagnet is energized to attract the select jack, etc. to a position for abutment with a cam which displaces them (see FR-A 2 428 096).
  • a set of needle selecting electromagnets are opposed to each other to constitute a passage therebetween, and the selector is passed through the said passage while one electromagnet is operated to attract the selector to that electromagnet, thereby effecting needle selection.
  • the position of the selector passing through the passage is not constant, nor is constant the moving distance of the selector attracted, so the selecting operation is apt to be unstable.
  • the present invention has been accomplished in view of the above-mentioned points and it is the object thereof to permit highly accurate selection in a short time while eliminating drawbacks in electromagnetic needle selection such as lowering of the selection accuracy caused by the selection in an irregular condition of members to be selected such as the selector, etc. arrived at the position opposed to an electromagnet, and prolonging of the time required for the selection.
  • the invention proposes an electromagnetic selector device in which a selector is supported by a carriage so that an attractive select face of the selector moves along and in sliding contact with an upper edge of each of thin plate-like select jacks supported rockably by a support jack through a support member, the attractive select face of the selector being provided with a jack posture correcting edge projecting from the attractive select face and extending in the same direction as the select jacks; a jack support edge similar to the jack posture correcting edge is provided projectingly on the attractive select face in a position which approximately quarters the same face together with the jack posture correcting edge, the attractive select face being the highest at the jack posture correcting edge and the jack support edge and inclined downward in directions farther from the said edges; poles of electromagnets are provided on the jack posture correcting edge and on both sides of the jack support edge, and poles of permanent magnets are provided on both outsides in the jack support edge direction of the poles of the electromagnets.
  • the operation of the device is the following.
  • the attractive select face of the selector supported by the carriage is brought into sliding contact with an upper edge of each of plural thin plate-like select jacks inserted in needle grooves in a rockably supported state by the support member. All the jacks are made uniform in posture by the jack posture correcting edge perpendicularly intersecting the advancing direction of the carriage and extending projectingly from the attractive select face in the same direction as the select jacks.
  • a set of electromagnets provided on the jack posture correcting edge are energized, thereby allowing a half of the upper edge of the select jack to be attracted by one electromagnet, and with subsequent movement of the carriage the select jack is tilted along the inclination of the attractive select face in an attracted state of the select jack upper edge to a half of the attractive select face and in a supported state of the select jack on the associated support member, whereby the select jack is separated from the other select jacks.
  • the Figures show an electromagnetic needle selector 1 which is mounted to an earth plate 3 of the carriage which reciprocates above a needle bed 2. It has electromagnets 4a, 4b, 4c, 4d and permanent magnets 5a, 5b, 5c, 5d. Since the electromagnets 4a, 4b, 4c and 4d are of the same shape, the structure of only 4c or 4d ( Figures 5 to 8) will now be explained.
  • Numerals 6a - d denote pure iron for magnetic poles, having a thinly projecting base end portion, with non-magnetic liners 71 a and 72a being disposed on both sides thereof.
  • L-shaped hardened soft iron plates 81 a and 82a are disposed side by side whose L-shaped fore ends are close to the magnetic pole pure irons 6a - d. Further, a positioning pin 10 is inserted in a slot 9 formed in a straight line through the magnetic pole pure iron, non-magnetic liners 71a, 72a and L-shaped hardened soft iron plates 81 a, 82a to prevent free movement of those components.
  • the magnetic pole pure irons 6a - d, non-magnetic liners 71a, 72a and L-shaped hardened soft iron plates 81a, 82a thus connected in series are held in a plural number sandwichwise with spacers 11, 12, 13 and side plates 14, 15 which are formed of an abrasion-resistant, non-magnetic, hard material, and pins 16 are inserted through these components in three positions and fixed on both sides with nuts 17 to provide an integral construction ( Figures 5 and 6).
  • the lower edges of the L-shaped hardened soft iron plates are each in the form of beak, smaller in volume at the central part, so that magnetic flux is concentrated thereon to enhance the attraction.
  • Joint pieces 20 made of pure iron are fitted in the tops of the magnetic pole pure irons 6a, 6b, 6c and 6d of the electromagnets 4a, 4b, 4c and 4d, and the magnetic pole pure irons 6a and 6b as well as 6c and 6d are made integral respectively using bolts 21; at the same time, the electromagnets 4a and 4b as well as 4c and 4d are rendered continuous at their top portions, respectively, thus forming a horseshoe shape. Two blocks of such horseshoe shape are provided.
  • a coil 22 is wound round each of the magnetic pole pure irons 6a, 6b, 6c and 6d, and the lower ends of the aforementioned two sets of the horseshoe-like magnetic pole pure irons can serve as electromagnets upon energization of the coils 22.
  • the coils are wound so that the electromagnets are the same in polarity as the permanent magnets 5a, 5b, 5c and 5d, the outside being N pole and the inside S.
  • the fore ends of the magnetic pole pure irons 6a, 6b, 6c and 6d are also thin to enhance the magnetic flux density.
  • the fore ends of the magnetic pole pure irons 6a - 6d are adjacent to the fore ends of the L-shaped hardened soft iron plates 81 a - 81 d and 82a - 82d through non-magnetic liners 71 a - 71 d and 72a - 72d.
  • the spacing depends on the thickness of the non-magnetic liners 71 a - 71 d and 72a - 72d, but it is very small.
  • the attractive select face 30 of the selector 1 projects to the greatest extent at its central longitudinal and transverse lines A and B (Fig. 4) (posture correcting edge and support edge, respectively, hereinafter) and is inclined gently in the arrowed directions. This is for ensuring high attraction of the select jacks 41.
  • Numeral 39 denotes a positioning pin for holding the position of the positioning jack 37.
  • Numeral 40 denotes a grooved select plate, with a select jack groove being formed between the grooved plates 40 and with a select jack 41 being inserted in the so-formed groove.
  • the select jack 41 is centrally fitted loosely on a protuberant support member 42 of the support jack 38.
  • the fitting between the support jack 38 and the select jack 41 leaves a gap which permits a slight (0.2 - 0.3 mm) vertical movement.
  • the support jack' 38 is pushed up from below by the spring pressure of the positioning jack 37.
  • Numeral 43 denotes a grooved select sensor plate for timing to energize the electromagnets 6a, 6b, 6c and 6d.
  • the selector 1 is disposed on the needle bed 2 so that the center line B in the advancing direction of the attractive select face 30 of the selector 1 is positioned on the center line of the aforementioned fitting portion.
  • the selector 1 is fixed to the earth plate 3 as previously noted. This fixing is done in the following structure (Fig. 2).
  • the selector 1 is fixed with bolts 53 to a selector mounting base 52 which comprises guide bars 51 disposed in parallel crosses.
  • the selector mounting base 52 is fixed to the earth plate 3 with mounting bolts 54.
  • rake cams 55 and 56 are fixed with fixing bolts 57 to the underside of the earth plate 3 at a side portion of the attractive select face 30 of the selector 1.
  • the selector 1 of the present invention reciprocates on the needle bed 2 with movement of the carriage (not shown). But, when the select jack 41 corresponding to the needle (not shown) to be selected has become opposed to the selector 1, the electromagnets 6a and 6b, or 6c and 6d, are energized to attract the select jack 41 to the attractive select face 30 of the selector 1, allowing the select jack 41 to move through the rake cams 56 and 57, so that the needle also moves following the movement of the select jack and thus there is performed needle selection.
  • the selector 1 is moving leftword together with the carriage (not shown).
  • the select jacks 41 located on the advancing side of the selector 1 those falling under the range of A are in their raised or lowered positions at their end portions while keeping their state in the previous course knitting. But their end portions are forced down by a slant face 55a of the rake cam 55.
  • the select jacks advance through section B in Fig. 9 and arrive at and near the central part C of the selector 1.
  • the center line A of the attractive select face 30 of the selector 1 is the highest and that horizontal, so the select jacks 41 attracted by the permanent magnets 51 a and 52a assume a horizontal state.
  • the electromagnets 4a and 4b, or 4c and 4d are energized in accordance with a detected signal provided from a needle pitch sensor (not shown). The electromagnets 4c and 4d are energized when a needle is to be brought into its operative position.
  • the corresponding select jack 41 is attracted for rocking clockwise in Fig. 1.
  • the electromagnets 4a and 4b are energized.
  • the corresponding select jack 41 is attracted for rocking counterclockwise.
  • the duration of the above energization is from 1/2 pitch this side up to 1/2 pitch on the other side of the center line of the selector 1 in terms of the select jack pitch.
  • the select jack 41 attracted by electromagnets slides along the attractive select face 30 in a state of abutment of its upper edge with the select face. Even after deenergization, it advances while maintaining its attracted state in energization under the action of the permanent magnet 51a.
  • the selected select jack 41 comes into abutment at an end portion thereof with a cam surface 56a of the rake cam 56 and is thereby forced out to push out the corresponding needle (not shown) through the support jack 38, positioning jack 37 and jack 36.
  • the selector 1 is supported by the carriage so that the attractive select face 30 of the selector moves along and in sliding contact with an upper edge of each of thin plate-like select jacks 41 supported rockably by the support jack 38 through a support member 42.
  • the attractive select face 30 of the selector 1 is provided with the jack posture correcting edge A projecting from the attractive select face 30 and extending in the same direction as the select jacks.
  • the jack support edge B similar to the jack posture correcting edge A is provided projectingly on the attractive select face 30 in a position which approximately quarters the same face together with the jack posture correcting edge A.
  • the attractive select face 30 is the highest at the jack posture correcting edge A and the jack support edge and is inclined downward in directions farther from the said edges.
  • the poles 6a - 6d of electromagnets 4a - 4d are provided on the jack posture correcting edge A and on both sides of the jack support edge B.
  • Poles 81 a - 81 d and 82a - 82d of permanent magnets 51 a, b and 52a, b are provided on both outsides in the jack support edge direction of the poles of the electromagnets.
  • the select jack to be selected can be pivoted and selected in one direction about the support edge B of the attractive select face 30 upon energization of electromagnets also constituting the same face.
  • the whole or part of the upper edge of the select jack is held in contact with the select face 30 of the selector 1, so the selecting operation is accurate and can be done in an instant.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
EP87108352A 1986-06-11 1987-06-10 Electromagnetic selector device in knitting machine Expired - Lifetime EP0249203B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP61135211A JPS62299554A (ja) 1986-06-11 1986-06-11 横編機における電磁式セレクタ−
JP135211/86 1986-06-11

Publications (2)

Publication Number Publication Date
EP0249203A1 EP0249203A1 (en) 1987-12-16
EP0249203B1 true EP0249203B1 (en) 1990-09-19

Family

ID=15146443

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87108352A Expired - Lifetime EP0249203B1 (en) 1986-06-11 1987-06-10 Electromagnetic selector device in knitting machine

Country Status (5)

Country Link
EP (1) EP0249203B1 (ja)
JP (1) JPS62299554A (ja)
KR (1) KR900002762B1 (ja)
DE (1) DE3765015D1 (ja)
ES (1) ES2017672B3 (ja)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6661339B2 (en) 2000-01-24 2003-12-09 Nextreme, L.L.C. High performance fuel tank
US7752980B2 (en) 2000-01-24 2010-07-13 Nextreme Llc Material handling apparatus having a reader/writer
US7948371B2 (en) 2000-01-24 2011-05-24 Nextreme Llc Material handling apparatus with a cellular communications device
US8077040B2 (en) 2000-01-24 2011-12-13 Nextreme, Llc RF-enabled pallet

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4028132C2 (de) * 1990-09-05 1994-06-30 Harting Elektronik Gmbh Auswahlmagnet
IT1244160B (it) * 1990-11-23 1994-07-08 Savio Spa Selettore elettromagnetico dotato di una pluralita' di postazioni di selezione
EP0503216B1 (fr) * 1991-03-15 1995-01-25 Conti Florentia S.R.L. Dispositif de sélection des aiguilles pour machine à tricoter circulaire, en particulier pour les bas
CH686141A5 (fr) * 1991-09-20 1996-01-15 Steiger Sa Atelier Constr Dispositif de selection des aiguilles d'une machine a tricoter.
DE69612332T2 (de) * 1995-07-04 2001-09-20 Precision Fukuhara Works, Ltd. Rundstrickmaschine mit Jacquardmustersteuervorrichtung
JPH108358A (ja) * 1996-06-20 1998-01-13 Fukuhara Seiki Seisakusho:Kk 丸編機における編みツール制御装置
EP0851051B1 (en) * 1996-12-23 2003-06-04 Precision Fukuhara Works, Ltd Circular knitting machine with jacquard pattern control mechanism
DE69826449T2 (de) * 1998-03-31 2005-09-29 Precision Fukuhara Works, Ltd., Kobe Jacquardmuster-Steuervorrichtung für eine Rundstrickmaschine
KR19980087771A (ko) * 1998-09-17 1998-12-05 전현옥 강냉이면 제조방법 및 제조장치
KR100315892B1 (ko) * 1999-07-16 2001-12-12 서정수 편직기의 선침장치
CN100460580C (zh) * 2006-06-29 2009-02-11 冯加林 一种用于控制横编织机梭箱的电磁铁

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1269762C2 (de) * 1963-05-31 1979-08-16 Nadelwaehlvorrichtung fuer strickmaschinen
DE2356536A1 (de) * 1973-11-13 1975-05-15 Stoll & Co H Abwurfstelle an steuermagnet
CH622566A5 (ja) * 1978-06-05 1981-04-15 Dubied & Cie Sa E
IT1198896B (it) * 1984-08-06 1988-12-21 Meritex Srl Macchina circolare da maglieria con sistemi di selezione elettromagnetici degli aghi

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6661339B2 (en) 2000-01-24 2003-12-09 Nextreme, L.L.C. High performance fuel tank
US7752980B2 (en) 2000-01-24 2010-07-13 Nextreme Llc Material handling apparatus having a reader/writer
US7948371B2 (en) 2000-01-24 2011-05-24 Nextreme Llc Material handling apparatus with a cellular communications device
US8077040B2 (en) 2000-01-24 2011-12-13 Nextreme, Llc RF-enabled pallet
US8585850B2 (en) 2000-01-24 2013-11-19 Nextreme, Llc Thermoformed platform having a communications device

Also Published As

Publication number Publication date
JPH0143054B2 (ja) 1989-09-18
KR880000637A (ko) 1988-03-28
DE3765015D1 (de) 1990-10-25
EP0249203A1 (en) 1987-12-16
KR900002762B1 (ko) 1990-04-28
ES2017672B3 (es) 1991-03-01
JPS62299554A (ja) 1987-12-26

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