EP0805885B1 - Vorrichtung zum vertikalen spannen vom gestrick an einer automatischen strickmaschine, insbesondere an einer flachstrickmaschine - Google Patents

Vorrichtung zum vertikalen spannen vom gestrick an einer automatischen strickmaschine, insbesondere an einer flachstrickmaschine Download PDF

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Publication number
EP0805885B1
EP0805885B1 EP96900153A EP96900153A EP0805885B1 EP 0805885 B1 EP0805885 B1 EP 0805885B1 EP 96900153 A EP96900153 A EP 96900153A EP 96900153 A EP96900153 A EP 96900153A EP 0805885 B1 EP0805885 B1 EP 0805885B1
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EP
European Patent Office
Prior art keywords
fabric
claws
roller
abutment plate
presser plates
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
EP96900153A
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English (en)
French (fr)
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EP0805885A1 (de
Inventor
Benito Stoppazzini
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.)
EMM SRL
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EMM SRL
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Filing date
Publication date
Application filed by EMM SRL filed Critical EMM SRL
Publication of EP0805885A1 publication Critical patent/EP0805885A1/de
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Publication of EP0805885B1 publication Critical patent/EP0805885B1/de
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
    • D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
    • D04B15/88—Take-up or draw-off devices for knitting products
    • D04B15/90—Take-up or draw-off devices for knitting products for flat-bed knitting machines

Definitions

  • the present invention relates to manufacturing of automatic knitting machines, in particular flat-bed knitting machines.
  • flat-bed knitting machines are usually equipped with a couple of needle beds, along which a carriage moves longitudinally with alternate motion.
  • the carriage bears suitable actuator units that move selectively, according to a prefixed programme, needles which are introduced inside transversal slits made at regular distances along the needle beds.
  • the above mentioned actuator units actuate the needles in succession, according to the commands provided by an electronic control unit, programmed with a suitable knitting programme, so as to achieve formation, in succession, of a series of so-called fabric rows.
  • Knitting machines need to stretch vertically the fabric being formed.
  • the traditional devices used for this purpose generally include one or more rollers placed below the needle beds and parallel thereto. These rollers are designed to clamp and pull the fabric while being formed.
  • a known device of this type provides a couple of rollers tangent to each other and rotated in opposite directions, for a preset time interval, at the end of each carriage stroke.
  • the US Patent N. 5.271.250 belonging to the same applicant, describes a device that obtains a uniform vertical stretching of adjacent portions of fabric even in the presence of areas of different lengths.
  • This device provides a series of clamping members for the fabric, situated below the needle beds, regularly spaced out, and including each one a couple of jaws articulated to supporting element integral with slides, operated vertically with reciprocating intermittent motion, from a raised position, in which the fabric is clamped, to a lowered position, in which the fabric is released.
  • Suitable cams are designed to close the clamping members in suitable phase relation with formation of the fabric rows, when the slide is in the raised position. Therefore, these clamping members cyclically clamp the fabric, perform a pulling stroke, and then release the fabric.
  • the stroke of the holding parts can be varied from a maximum to a minimum, relative to the desired stretching degree that depends on the knitting type and the number of fabric forming operation that can- be obtained with a single stroke of the carriage.
  • the possibility to increase the stretching is limited to the maximum stroke that can be imparted to the holding parts.
  • gripper elements cooperating with the clamping members, hold the fabric when the clamping members are open and return to the raised position.
  • the above mentioned device performs an effective stretching action when the manufacturing is of the type including one or at most two fabric forming operations for each stroke of the carriage.
  • the object of the present invention is to propose an improved device that performs a uniform vertical stretching of fabric in knitting machines, in particular that varies the stretching in accordance with the kind of manufacturing technique and the number of fabric forming operation per carriage stroke.
  • a device for the vertical stretching of fabric in an automatic knitting machine in particular a flat-bed knitting machine, which includes two longitudinal needle beds below which the fabric being formed exits, and that further includes a series of clamping members for the fabric, arranged below the needle beds regularly spaced apart, and respectively consisting of oscillating claws, articulated to a supporting element along a longitudinal axis extending parallel to the needle beds, a stationary abutment plate cooperating with the claws, and presser plates articulated to the claws along a longitudinal axis and designed for pressing fabric on a longitudinal roller arranged below the abutment plate and driven to rotate with a continuous motion according to a direction in agreement with the descent of the fabric being formed.
  • a slide element is connected to the supporting element and is actuated so as to slide vertically stepwise with a reciprocating motion, between a raised position, in which the fabric is clamped and a lowered position, in which the fabric is released.
  • Cam means are provided for rotation of the claws to close the clamping elements, in suitable phase relation with formation of the rows of the fabric, when the slides are located in the raised position.
  • the two needle beds of a flat-bed automatic knitting machine are indicated with 1 and 2, and a portion of a knitted fabric being formed is indicated with 3.
  • the needle beds 1 and 2 feature regularly spaced apart transverse slits, well known in the art, in which the needles 4 are inserted and actuated by respective operative systems.
  • the needle beds 1 and 2 are supported by a stationary frame that includes a couple of platforms 5 situated respectively below the needle beds 1 and 2; the platforms 5 are fixed to the needle beds 1,2 surfaces with interposition of a plurality of spacer elements 6.
  • a cross-member 7, that defines a vertical surface extending lengthwise along the needle beds 1, 2, is fixed to a first of the platforms 5.
  • connection plate 8 is fixed to the second platform 5, adjacent thereto, forms a vertical wall extending lengthwise along the machine, below the top of the first needle bed 1, and supports an abutment plate 9.
  • connection plate 8 bears also a rotating knurled roller 10 (see also Fig. 6), arranged below the abutment plate 9 and operated, by suitable motor means, with a continuous motion at low speed, according to a rotation direction in agreement with the descent of the fabric being formed.
  • a rotating knurled roller 10 (see also Fig. 6), arranged below the abutment plate 9 and operated, by suitable motor means, with a continuous motion at low speed, according to a rotation direction in agreement with the descent of the fabric being formed.
  • a vertically sliding angular element 11 is fitted alongside the cross-member 7.
  • Suitable pads 12 made of antifriction material, designed to reduce the sliding friction, are placed between the angular element 11 and the cross-member 7.
  • the pads 12 are inserted in corresponding openings made on the angular element 11 and are blocked by a plate 13 placed longitudinal to the same angular element 11.
  • a series of prongs 15, suitably spaced out, are articulated to the angular element 11 by related hinges 14.
  • the prongs 15 have an upper portion 15a, designed to face the cross-member 7, and a lower portion 15b facing downwards; the downward facing portion 15b is located below the angular element 11.
  • the hinge 14 features two seats for receiving of respective pins 18 and 19 for the pivotal connection to the angular element 11 and the lever 16; the pins 18,19 have horizontal axes that are parallel to the machine.
  • the lever 16 protrudes over the cam shaft 17 in a kind of beak 16a.
  • the lever 16 normally rests against the downward facing part 15b of the prong 15 being held in position by elastic action of a spring 20 fitted in a housing made in the same lever 16.
  • the spring 20 is retained by a knob 21 inserted in the above mentioned housing of the lever 16; the head of this knob 21 rests against the lower surface of the downwards facing portion 15b of the prong 15.
  • each prong 15 there is situated a clamping member 22, aimed at cooperating with the stationary abutment plate 9 for holding the fabric 3 to be stretched.
  • the clamping member 22 includes a claw 23 equipped with couples of teeth 23a arranged along the upper edge.
  • the presser plates 25 push lightly the roller 10, due to the elastic action exerted by a spring 26, that urges the prong 15.
  • the presser plates 25 On their surface turned toward the roller 10, the presser plates 25 feature a series of vertical grooves 27; these grooves 27 are designed to receive the threads that separate the rows of the fabric 3 being formed, extended in known way in direction parallel to the same fabric.
  • the presser plates 25 have a section 25a bent toward the prong 15.
  • the presser plates 25 In correspondence with the ends of the needle beds 1,2, there is a pair of symmetrical slides 28, only one of which can be seen in the drawing; the slides 28 are fitted in known way to the angular element 11.
  • Each slide 28 has a rack profile 29 that meshes with a pinion 30, supported rotatably by the stationary frame 31 of the machine and designed to be stepwise operated by related drive parts.
  • the slide 28 On the side opposite to the rack 29, the slide 28 is guided by a counter-roller 32, also supported rotatably by the stationary frame 31 of the machine.
  • the action of the rack 29 is also balanced by a spring 33 suspended vertically on the frame 31 and hooked to a pin 34 protruding transversally to the lower end of the slide 28.
  • the presser plates 25 follow the downward movement imposed to the claws 23 by the slides 28. Due to reciprocal adaptations, the lowering of the claws 23 determines also rotation of the presser plates 25 with the roller 10 acting as a pin.
  • This rotaticn carries the bent section 25a of the presser plates 25 to strike against the prongs 15, so as to form with the latters one rigid body capable of clamping with force the fabric to the rotating knurled roller 10 (Fig. 4).
  • presser plates 25 causes also a limited rotation of the prongs 15 that rotate with respect to the levers 16, kept in contact with the cam shaft 17.
  • the knurled roller 10 can continue the stretching action of the fabric 3, if this is necessary.
  • the device allows to vary operation in relation with the length of the rows and the number of the fabric forming operations per each carriage stroke.
  • the stretching steps performed by the claws 23, illustrated previously are sufficient in the machines with one or two fabric forming operations, while further stretching performed by the knurled roller 10, during the descent stroke, is advantageously used in the machines with many fabric forming operations, such as three or four operations.
  • the presser plates 25, in conjunction with the roller 10, can alsc maintain the fabric 3 taut during the subsequent step, in which the slides 28 rise again (Fig. 5).
  • a further rotation of the cam shaft determines the disengagement of the levers 16, that return to form one body with prongs 15.
  • the rise does not bring the teeth 23a of the claws 23 to touch the stationary abutment plate 9, since the springs 26 push elastically the presser plates 25 so as to touch a knurled roller 10, thus allowing a light return rotation of the prongs 15, that keeps the same prongs 15 suitably distanced from the abutment plate 9.
  • the device in question involves the creation of a sequence of successive clamping steps for the fabric 3 performed by the claws 23 in conjunction with the abutment plate 9, then descent of these claws 23 for the stretching of the fabric 3, and lastly return of the claws 23 to the raised inoperative position.
  • the clamping members 22 are normally activated when the carriage, that slides along the needle beds 1, 2, inverts its stroke.
  • the fabric 3 is kept taut by the presser plates 25 that clamp it elastically to the knurled roller 10, operated with a continuous motion at a low speed.
  • the roller 10 exerts a constant traction action, preventing the fabric from elastic returning.
  • the rotating knurled roller 10 allows to continue stretching of the fabric.
  • the described device makes it possible to vary the stretching in relation to the number of fabric forming operations and the type of manufacturing.
  • the device is also simple to build, thus reducing considerably the costs of production and maintenance.
  • the device subject of this invention, has been proposed associated with a flat-bed machine, for example for knit-wear.
  • This device can be usefully adopted with any kind of machine that produces fabric in an intermittent kind.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)

Claims (7)

  1. Vorrichtung zum vertikalen Spannen eines Gestrickes in einer automatischen Strickmaschine, die zwei längsverlaufende Nadelbetten (1, 2) hat, unter denen das entstehende Gestrick (3) austritt, wobei die Vorrichtung aufweist:
    eine Reihe gleichmäßig beabstandeter Spannglieder (22) für das Gestrick (3), die unterhalb der Nadelbetten (1, 2) angeordnet und jeweils aus schwingenden Spannbacken (23) bestehen, die an einem Trägerelement (11) um eine parallel zu den Nadelbetten (1, 2) verlaufende Längsachse (18) angelenkt sind,
    Schieber (28), die mit dem Trägerelement (11) verbunden und so betätigbar sind, daß sie in vertikaler Richtung in Form einer hin- und hergehenden Bewegung schrittweise gleitend verschoben werden, und zwar zwischen einer oberen Stellung, in der das Gestrick (3) eingespannt ist, und einer unteren Stellung, in der das Gestrick (3) freigegeben ist,
    Nockenmittel (17), die eine Winkeldrehung der Spannbacken (23) hervorrufen, um die Spannglieder (22) in geeigneter Phasenbeziehung zur Reihenbildung des Gestrickes (3) zu schließen, wenn sich die Schieber (28) in der oberen Stellung befinden,
    gekennzeichnet durch
    eine stationäre Anschlagplatte (9), die mit den Spannbacken (23) zusammenwirkt, und Andrückplatten (25), die an den Spannbacken (23) entlang einer Längsachse (24) angelenkt sind, um das Gestrick gegen eine längs verlaufende Rolle (10) anzudrücken, die unterhalb der Anschlagplatte (9) angeordnet ist und so angetrieben wird, daß sie sich in Übereinstimmung mit der Abwärtsbewegung des entstehenden Gestricks kontinuierlich dreht.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Spannbacken (23) an entsprechenden gabelartigen Zinken (15) befestigt sind, die an dem Trägerelement (11) angelenkt sind, wobei entsprechende Hebel (16) ebenfalls mit den gabelartigen Zinken (15) gelenkig verbunden und einer elastischen Wirkung von Federn (20) ausgesetzt sind, die von dem selben Trägerelement (11) gehalten werden.
  3. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Spannbacken (23) an ihrem oberen Rand Zähne (23) haben, um das Gestrick (3) mit der stationären Anschlagplatte (9) zu verspannen.
  4. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß jede der Andrückplatten (25) aus einer Art Schaufel besteht, die mit ihrem oberen Keil an den Spannbacken (23) angelenkt ist und der Wirkung einer Feder (26) untersteht, die eine Kraft in Richtung auf die mit einer Rändelung versehene Rolle (10) ausübt.
  5. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß eine der Andrückplatten (25) an ihrem unteren Rand einen Abschnitt (25a) aufweist, der in Richtung auf die der Rolle (10) gegenüberliegende Seite gebogen ist und der, wenn er sich in einer Betriebsstellung befindet, an einem an den Spannbacken (23) befestigten gabelartigen Zinken (15) ruht.
  6. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß jede der Andrückplatten (25) auf ihrer der Rolle (10) zugewandten Oberfläche eine Reihe von vertikalen Nuten (27) hat, welche die Fäden aufnimmt, die die Reihen des entstehenden Gestrickes (3) trennen.
  7. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Anschlagplatte (9) eine vertikale Wand hat, die in Längsrichtung unterhalb der Oberseite eines ersten Nadelbettes (1) vor den Spannbacken (23) verläuft.
EP96900153A 1995-01-23 1996-01-18 Vorrichtung zum vertikalen spannen vom gestrick an einer automatischen strickmaschine, insbesondere an einer flachstrickmaschine Expired - Lifetime EP0805885B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
IT95BO000016A IT1278165B1 (it) 1995-01-23 1995-01-23 Dispositivo perfezionato per la tesatura verticale del tessuto di una macchina automatica per maglieria, in particolare rettilinea
ITBO950016 1995-01-23
PCT/IB1996/000041 WO1996023094A1 (en) 1995-01-23 1996-01-18 Device for vertical stretching of fabric in an automatic knitting machine, in particular a flat-bed knitting machine

Publications (2)

Publication Number Publication Date
EP0805885A1 EP0805885A1 (de) 1997-11-12
EP0805885B1 true EP0805885B1 (de) 1999-07-14

Family

ID=11340216

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96900153A Expired - Lifetime EP0805885B1 (de) 1995-01-23 1996-01-18 Vorrichtung zum vertikalen spannen vom gestrick an einer automatischen strickmaschine, insbesondere an einer flachstrickmaschine

Country Status (7)

Country Link
EP (1) EP0805885B1 (de)
JP (1) JPH10512930A (de)
BR (1) BR9606775A (de)
DE (1) DE69603254T2 (de)
ES (1) ES2133923T3 (de)
IT (1) IT1278165B1 (de)
WO (1) WO1996023094A1 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1279655B1 (it) * 1995-10-16 1997-12-16 Emm Srl Dispositivo perfezionato per la tesatura verticale del tessuto in una macchina automatica per maglieria, in particolare rettilinea.
KR100521798B1 (ko) * 1996-11-06 2006-01-12 가부시키가이샤 시마세이키 세이사쿠쇼 횡편기에있어서편지인하장치
CN1912219A (zh) * 2006-08-28 2007-02-14 吴宇芯 罗拉组
CN103898672A (zh) * 2013-12-11 2014-07-02 常熟市国光机械有限公司 电脑针织横机罗拉卷取机构
CN112877893B (zh) * 2021-01-11 2022-04-12 桐乡市强隆机械有限公司 针织横机的双层牵引罗拉装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2803135C2 (de) * 1978-01-25 1986-10-09 H. Stoll Gmbh & Co, 7410 Reutlingen Gestrickabzugsvorrichtung für Flachstrickmaschinen
ES265992Y (es) * 1982-05-25 1983-08-01 Lecho de agujas para maquinas tricotosas rectilineas automaticas.
CH659269A5 (de) * 1982-08-04 1987-01-15 Stoll & Co H Warenabzugsvorrichtung einer flachstrickmaschine.
JPH05214645A (ja) * 1991-07-18 1993-08-24 Emm Srl フラット編機等の自動編機における生地の垂直方向引っ張り装置

Also Published As

Publication number Publication date
DE69603254D1 (de) 1999-08-19
IT1278165B1 (it) 1997-11-17
WO1996023094A1 (en) 1996-08-01
DE69603254T2 (de) 1999-12-16
MX9705578A (es) 1998-06-28
ITBO950016A1 (it) 1996-07-23
EP0805885A1 (de) 1997-11-12
BR9606775A (pt) 1998-01-06
ES2133923T3 (es) 1999-09-16
JPH10512930A (ja) 1998-12-08
ITBO950016A0 (it) 1995-01-23

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