US3657906A - Straight bar knitting machines - Google Patents

Straight bar knitting machines Download PDF

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Publication number
US3657906A
US3657906A US42215A US3657906DA US3657906A US 3657906 A US3657906 A US 3657906A US 42215 A US42215 A US 42215A US 3657906D A US3657906D A US 3657906DA US 3657906 A US3657906 A US 3657906A
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US
United States
Prior art keywords
carrier
yarn
knitting
stop
bay
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Expired - Lifetime
Application number
US42215A
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English (en)
Inventor
Barry Frederick Swanwick
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.)
MONK SUTTON IN ASHFIELD Ltd SA
Sa Monk Sutton In Ashfield Ltd
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MONK SUTTON IN ASHFIELD Ltd SA
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Expired - Lifetime legal-status Critical Current

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    • 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
    • D04B15/54—Thread guides
    • D04B15/64—Thread guides for straight-bar knitting machines

Definitions

  • each yarn carrier device comprises a carrier 1.8.
  • CI- R box Slidable relative to its yacting carrier rod a drive [51] Ill!- Cl. bracket secured to said carrier rod and centralizing pring [58] Field Of Search ..66/l26 R, 130 means arranged between said carrier box and said drive bracket to permit of limited excess movement of said carrier rod and said drive bracket relative to said carrier box.
  • PATENTEDAPR 25 i972 STRAIGHT BAR KNITTING MACHINES This invention relates to straight bar knitting machines and is concerned with improved means for laying the yarn across the knitting elements particularly in muti-head machines.
  • the yarn carriers are fixed to carrier rods which extend lengthwise of the machine.
  • a plurality of such rods are generally provided and each has mounted thereon several yarn carrier devices which 1 are arranged one to each knitting head and in the same position relative to each knitting head.
  • each carrier rod is reciprocated lengthwise of the knitting heads and means are provided to stop movement thereof, and thus of the yarn carriers, precisely at the terminal positions corresponding to the selvedges of the garment piece being knitted.
  • Another known method is to drive the carrier rod by means of a friction box which is caused to slip when the carrier rod impacts against the selvedge stops provided on the selvedge or fashioning screw nut housings.
  • This method has the disadvantage that considerable forces have to be dissipated and the v slamming condition hereinbefore referred to severely inhibits the speed of operation of the machine.
  • a still further known method is to fix each yarn carrier onto a light weight box which is slidably mounted on the carrier rod and iscaused to reciprocate with it by means of friction pads.
  • selvedge stops provided on the selvedge or fashioning screws are arranged over each knitting head and each friction carrier box impacts against its own individual right-hand and left-hand selvedgestops.
  • This method has the advantage over the previously described methods that the slamming condition is considerably reduced since the mass of the yarncarrier box is substantially reduced.
  • a disadvantage of this method is the need for latches to be provided for each box to be retained in its extreme selvedge position, and to facilitate widening.
  • a yarn carrier system for multi-head straight bar knitting machines comprising at least one reciprocatory carrier rod mounting at least one yarn carrier device in respect of each knitting head, and adjustable stop means for limiting the extent of reciprocatory movement of the yarn carrier devices, wherein each yarn carrier device incorporates centralizing or overload means which permit of limited excess traversing movement of the carrier rod to take place, thereby eliminating the need for precise terminal positioning of ,all the heavy reciprocating masses provided by the carrier rods and the yarn carrier devices.
  • the centralizing or overload means comprise a compression spring arranged between a part of the carrier box which is fixed to the carrier rod and a part of the carrier box which is slidably mounted on the carrier rod.
  • the invention provides light weight yarn carrier devices incorporating yarn guides and mounted on a' reciprocatory and relatively heavy, carrier rod which is accelerated from rest at one selvedge position and decelerated to rest at the other selvedge position, the yarn carrier devices being arranged and constructed so as to permit of relative movement between the yarn guides and the carrier rod so that the latter may, but not necessarily, travel slightly beyond the desired terminal position of the yarn carrier guides.
  • FIG. 1 is a cross section through part of a straight bar knitting machine showing the relative positions of a plurality of yarn carriers
  • FIG. 2 is a view in the direction of the arrow 2 of FIG. 1 showing only those parts which are necessary to give a clear understanding of the invention
  • FIG. 3 is a front elevation, on an enlarged scale, of a yarn carrier device according to the invention.
  • FIG. 4 is a section on the line 4 4 of FIG. 3.
  • FIG. 1 there is shown part of a straight bar knitting machine incorporating a plurality of yarn carrier boxes 1 having yarn guides 2.
  • the yarn guides 2 are positioned to co-operate with a series of needles 3 supported for limited angular movement in a needle bar 4.
  • a series of sinkers 5 slidable in tricks in a sinker bed 6 mounted on a frame member F are arranged to co-operate -with the needles 3 in known manner.
  • the sinkers 5 are operated by a slurcock 7 via jacks 81, the latter being urged into an inoperative position by means of springs 9.
  • a series of knock-over bits 10, supported on a knock-over bar 11, are provided to co-operate with the needles 3, again in well-known manner.
  • the yarn carrier boxes 1 are each mounted on a carrier rod 12.
  • the carrier rods 12 extend lengthwise of a knitting bay KB and into a control bay CB of the machine where they are connected to drive means (not shown) which serve, in well-known manner, to effect lengthwise reciprocation thereof and thus cause the carrier boxes 2 to reciprocate relative to the needles 3.
  • drive means not shown
  • the carrier rods 12 extend over any desired number of knitting bays KB and each rod 12 has attached thereto a yarn carrier box 1 in :respect of each knitting bay.
  • Each carrier box 1 comprises a base member 13 having fixed thereto, as by screws 14, two spaced bracket plates 15, the base member and the bracket plates being slidable relative to the rod .12.
  • the base 13, between the bracket 15, is provided with a downwardly depending lug 16 to which the yarn guides 2 is attached by means of screws 17.
  • a yarn feed tube 18 is provided to co-act with the guides 2 to prevent entanglement of the yarn.
  • the bracket plates 15 are provided with bosses 19 to receive opposite ends of a spindle 20.
  • the spindle 20 is screwthreaded at its ends, each of which ends is provided with a lock nut 21 and a stop member 22 to permit of adjustment thereof relative to the carrier box.
  • Slidably mounted on the spindle 20 are two spaced sleeves 23 one end of each of which is adapted to bear against one of the bosses 19 and the other end of each of which is formed with a transverse projection 24.
  • a compression spring 25 is also mounted on the spindle 20 and is arranged to bear against said other ends of the sleeves 23 to bias them into contact with the bosses 19. The force exerted by the spring 25 is preferably of the order of one-half kg.
  • a drive bracket 26 having two spaced lugs or projections 27 is secured, as by screws 28, to the carrier rod 12 and is positioned so that the lugs or projections 27 respectively enter into engagement with the projections 24 of the sleeves 23.
  • the carrier box if not otherwise influenced, is held in a central position relative to the drive bracket 26 which is fixed to the carrier rod 12.
  • Each stop mechanism 29 and 290 are provided in the or each knitting bay KB in order to dictate the length of the stroke of the or each yarn carrier box 1.
  • Each stop mechanism comprises a block 30 and stop bar 31 which is slidable in an opening formed in the block 30.
  • the block 30 adjacent one end is fixedly secured, by means of a screw 32, to an adjusting shaft 33 extending lengthwise of the machine.
  • the other end of the block 30 is bifurcated to slidably engage a fixed guide rod 34 which extends lengthwise of the machine between main frame members F.
  • the adjusting shaft 33 extends into the control bay CB where it is fixed to'a nut housing 35 mounted on a fashioning screw 36.
  • the screw is rotated, in known manner, by means of racks 37 and 38 actuated by co-acting racking pawls 39, 40.
  • the rack and pawl 37, 39 turns the screw 36 in one direction and the rack and pawl 38, 40 turns the screw 36 in the opposite direction.
  • Actuation of the racking pawls is effected, in well-known manner, via a linkage system from .the main cam shaft of the machine.
  • stop mechanism 29a is mounted and adjusted in the same manner, and by similar means, as that of the stop mechanism 29 except that the hand of the fashioning screw is the opposite to that of the fashioning screw 36 so that the stop mechanisms move in opposite directions to one another.
  • the nut housings and fashioning screws form part of a mechanism normally provided in fully fashioned straight bar knitting machines in order to position the width control means and the fashioning mechanisms and that they are additionally used in the present case to control the stops 29 and 290.
  • the stop bar 31 is in a position where it controls the length of the stroke of one yarn carrier 1.
  • the stop bar 31 is provided to be adjustable.
  • the stop bar 31 is provided at its free end with two upstanding prongs 41 which slidably engage a shaft 42 extending lengthwise of the knitting bay.
  • the shaft 42 is fixedly connected, via brackets 43 and 44, to an actuator shaft 45 which extends into the control bay CB where it has fixed thereto a link 46.
  • an actuating rod 47 Pivotally connected to the link 46 is an actuating rod 47 which is operated by, or from, the main cam shaft of the machine to move in a vertical direction to impart angular movement to the links 43, 44 and thus cause relative movement between the stop bar 31 and the block 30.
  • the vertical movement of the actuating rod 47, and thus the extent of movement of the stop bar 31, is controlled to co-operate with one or more yarn carriers 1 according to requirements.
  • the yarn carrier traversing means are operated in the normal way.
  • the yarn carrier box with its yarn guide 2 engages, as illustrated in FIG. 2, its co-acting stop bar 31 and stops, the
  • the arrangement provides precise terminal positioning of the yarn carrier box 1 and the yarn guide 2, and also permits the heavy traversing mechanism to be driven in excess of the garment piece width so that the excess motion can be conveniently lost without affecting the terminal positioning factor.
  • a further advantage of the arrangement of the invention is that the yarn carrier box 1, when in a stationary position adjacent the selvedge of the garment piece, is held in that position by the force of the compression spring thereby eliminating the need for latches which are normally required for that purpose.
  • the stop mechanisms 29 and 29a are moved outwards a distance equivalent to one needle pitch by racking the selvedge screws and the yarn carriers are moved outwards simultaneously with the stop mechanisms.
  • the simultaneous movement of the yarn carriers with the stop mechanisms is normally effected by the latches hereinbefore referred to which retain the carrier boxes in their positions adjacent the stop mechanisms.
  • the compression spring 25 of the yarn carrier is capable of exerting sufficient force to cause the yarn carrier box to follow the movement of its co-acting stop mechanism.
  • the yarn carrier arrangement of the present invention may be applied to any yarn laying system but it can with particular advantage be applied to the slur draw mechanism which is the subject of the aforementioned US. Pat. No. 3,575,017 as a cheap and simple replacement of the carrier chain draw arrangement.
  • a yarn carrier system for multi-head fully fashioned straight bar knitting machines comprising at least one reciprocatory carrier rod mounting at least one yarn carrier device in respect of each knitting head, and adjustable stop means for limiting the extent of reciprocatory movement of each yarn carrier device, wherein each yarn carrier device comprises a carrier box mounting a yarn guide which box is slidably mounted-on its co-acting carrier rod, a drive bracket fixedly secured to said carrier rod, and centralizing or overload means arranged between the carrier box and the drive bracket for permitting the carrier rod to have limited excess traversing movement beyond the terminal positions dictated by the stop means of the yarn carrier box.
  • centralizing or overload means comprise a spring means for biasing the carrier box into a central position relative to the drive bracket.
  • each yarn carrier device comprises a carrier box formed with two spaced bosses housing a spindle on which said compression spring is supported, a sleeve member slidably mounted on the spindle between each end of the compression spring and the respective bosses of the carrier box, the inner end of each sleeve member being provided with a projection which enters into engagement with a co-acting projection or lug formed on the drive bracket.
  • stop means comprise a pair of stop barseach mounted in a support block, the support blocks being adjustably mounted for lengthwise movement relative to the needle bed of each knitting bay.
  • a system as claimed in claim 4 including means for effecting lengthwise movement of said support blocks in opposite directions, which means comprise fashioning screws mounting nut housings and racking means arranged to rack said screws in opposite directions.
  • each of said stop bars is adapted to be adjusted relative to its co-acting support block.
  • support blocks are pivotally connected to a shaft extending lengthwise of the machine, said shaft being connected, as by spaced links, to an actuator shaft extending parallel with the first shaft, means being provided to impart angular movement to the actuator shaft and thus sliding movement of the stop bars in their respective support blocks.
  • stop means comprise a pair of stop bars each mounted in a support block, the support blocks being adjustably mounted for lengthwise movement relative to the needle bed for each knitting bay.
  • each of said stop bars is adapted to be adjusted relative to its co-acting support block.
  • stop means comprise a pair of stop bars each mounted in a support block, the support blocks being adjustably mounted for lengthwise movement relative to the needle bed for each knitting bay.
  • each of said stop bars is adapted to be adjusted relative to its co-acting support block.
  • each of said stop bars is adapted to be adjusted relative to its co-acting support block.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
US42215A 1969-06-04 1970-06-01 Straight bar knitting machines Expired - Lifetime US3657906A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB28295/69A GB1247789A (en) 1969-06-04 1969-06-04 Improvements in or relating to straight bar knitting machines

Publications (1)

Publication Number Publication Date
US3657906A true US3657906A (en) 1972-04-25

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ID=10273390

Family Applications (1)

Application Number Title Priority Date Filing Date
US42215A Expired - Lifetime US3657906A (en) 1969-06-04 1970-06-01 Straight bar knitting machines

Country Status (5)

Country Link
US (1) US3657906A (fr)
BE (1) BE751493A (fr)
ES (1) ES380373A1 (fr)
FR (1) FR2050402B1 (fr)
GB (1) GB1247789A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4321807A (en) * 1978-12-29 1982-03-30 William Cotton Limited Draw mechanism for straight bar knitting machines

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4430707A1 (de) * 1994-08-30 1996-03-07 Scheller Gmbh Flachkulierwirkmaschine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2623371A (en) * 1948-12-08 1952-12-30 Hosemaster Machine Company Ltd Knitting machine
US2670619A (en) * 1949-12-28 1954-03-02 Zimic Yarn feed mechanism for knitting machines
US2688861A (en) * 1952-02-01 1954-09-14 Textile Machine Works Carrier rod driving mechanism for knitting machines
US3364703A (en) * 1964-03-18 1968-01-23 Schieber Universal Maschf Control mechanism for the yarn carrier stops of a flat knitting machine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2623371A (en) * 1948-12-08 1952-12-30 Hosemaster Machine Company Ltd Knitting machine
US2670619A (en) * 1949-12-28 1954-03-02 Zimic Yarn feed mechanism for knitting machines
US2688861A (en) * 1952-02-01 1954-09-14 Textile Machine Works Carrier rod driving mechanism for knitting machines
US3364703A (en) * 1964-03-18 1968-01-23 Schieber Universal Maschf Control mechanism for the yarn carrier stops of a flat knitting machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4321807A (en) * 1978-12-29 1982-03-30 William Cotton Limited Draw mechanism for straight bar knitting machines

Also Published As

Publication number Publication date
BE751493A (fr) 1970-12-04
ES380373A1 (es) 1972-12-01
FR2050402A1 (fr) 1971-04-02
GB1247789A (en) 1971-09-29
FR2050402B1 (fr) 1973-05-25

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