US3580012A - Device for controlling the delivery of thread to a knitting machine - Google Patents

Device for controlling the delivery of thread to a knitting machine Download PDF

Info

Publication number
US3580012A
US3580012A US859416A US3580012DA US3580012A US 3580012 A US3580012 A US 3580012A US 859416 A US859416 A US 859416A US 3580012D A US3580012D A US 3580012DA US 3580012 A US3580012 A US 3580012A
Authority
US
United States
Prior art keywords
knitting machine
motor
thread
stopping
switches
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
US859416A
Other languages
English (en)
Inventor
Eugene Voisin
Jean-Pierre Raisin
Jean-Paul Delair
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.)
Institut Francais Textile et Habillement
Original Assignee
Institut Francais Textile et Habillement
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 Institut Francais Textile et Habillement filed Critical Institut Francais Textile et Habillement
Application granted granted Critical
Publication of US3580012A publication Critical patent/US3580012A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • D04B15/488—Thread-feeding devices in co-operation with stitch-length-regulating mechanism

Definitions

  • a device for controlling the delivery of thread to a knitting machine comprises a speed variator which is connected to a mechanical transmission extending between a cylinder and thread furnisher of the knitting machine, and a [54] igfig iggg g 0F motor which controls the van'ator.
  • the motor is reversible in 3 cl 1 DH forward and reverse directions and has two pairs of switches wmg which start and stop the motor in both directions.
  • the starting [52] US. Cl 66/55, switches are operated by a control cam and programming ele- 66/132 ment of the knitting machine.
  • a follower device is provided [51] Int. Cl D04b 15/48 whose travel corresponds to a predetermined length of fabric [50] Field of Search ..66/l32, 132 produced by the knitting machine and this follower device (T), 55, 54 operates the stopping switches.
  • the invention relates to a device for controlling the delivery of thread to a knitting machine and, in particular, although not so restricted, to a continuous stocking knitting machine.
  • a thread dispenser having two rotating truncated cones in contact with each other along one of their generators, is provided. Thread is guided by means of thread guides which are adjustable by a control cam of the knitting machine so that it passes between the two rotating truncated cones. According to whether the thread is located on a part of g the thread dispenser with larger or smaller diameter, it is supplied to the needles at greater or lesser velocity respectively.
  • a speed variator positioned between the cylinder of the machine and a feed roller so that the speed variator is adapted to be actuated in either of two directions as a function of the difference between a reference signal and a measuring signal indicating a desired and actual denier of the knitted fabric made on the knitting machine respectively.
  • This device does not permit a constant thread tension to be maintained when the dimensions of the knitted fabric are reduced, because of the delay in transmitting the difference signal to the speed variator.
  • this device can be used only when an article with constant diameter is knitted.
  • the diameter of the article is progressively reduced, such as in the case of knitting the body of a stocking and especially the calf portion, in spite of the provision of locking means which progressively reduce the length of the thread and a speed variator acting on the thread delivery, it is impossible to prevent that the thread tension varying frequently between one stitch and another.
  • a device for controlling the delivery of thread to a knitting machine having a cylinder, a programming element, progressive locking means, a sensor cooperating with a control cam, and a thread delivery device for supplying a plurality of needles with thread as a function of the position of the control cam
  • the device comprising a speed variator operatively connected to a mechanical transmission which is adapted to be disposed between the cylinder and the thread furnisher of the knitting machine, a motor operatively connected to control the variator, said motor being rotatable in forward and reverse directions, a first starting switch and a first stopping switch which, in operation, start and stop the motor in the forward direction respectively, a second starting switch and a second stopping switch which, in operation, start and stop the motor in the reverse direction respectively, the first and second starting switches being adaptedto be operated by the control cam and the programming element of the knitting machine respectively and a follower device whose travel corresponds to a predetermined length of fabric produced by the knitting machine, said follower member
  • a continuous stocking circular knitting machine 1 which may be of any known type comprises a hollow needle cylinder 2 carrying at its upper end latch needles 3 and at its lower end a toothed ring 4 connected to a drive motor (not shown).
  • the knitting machine 1 is also equipped with progressive locking means 5, comprising a plurality of annular cams 6, mounted on member 26, which cooperate with the latch needles 3 and a axially and engages the bottom of the hollow cylinder 2, and a substantially horizontal arm 7b which is hinged at one end to a fixed pivot and carries at its other end a cam follower engaging a rotating control cam 10.
  • the control cam 10 is rotated by the knitting machine 1 so as to control the progressive vertical positioning of needle cylinder 2 and thus sinkers 11 to change the relative position between the latch needles 3 and sinkers l1 and to reduce the length of the thread taken up by the latch needles 3.
  • Stocking fabric 12 made by the knitting machine 1 passes from the latch needles 3 through the hollow cylinder 2.
  • a thread 16, coming from a bobbin (not shown) is applied to the roller 14 of the thread fumisher 15 by means of a thread guide and is directed towards the latch needles 3 by means of a fixed thread guide 17.
  • a speed variator 18 is mounted in the mechanical transmission 13, for example between the connecting shafts 131 and 13m.
  • a speed ratio variation member 19 of the speed variator 18 is connected mechanically, for example between the connecting shafts l3l and 13m.
  • a speed ratio variation member 19 of the speed variator 18 is connected mechanically, for example by a belt 20, to an output shaft of an electric motor 21 which may rotate either in the direction of the arrow 1; or the arrow-fi.
  • the motor 21 may be a micromotor.
  • the rotation of the motor 21 in the direction of the arrow f may effect, for example, a reduction in the rotational speed of the connecting shaft 13m of the speed variator 18, whilst rotation of the motor 21 in the direction of the arrow jg may effect an increase in the rotational speed of the connecting shaft 13m.
  • the rotation of the motor 21 in the direction of the arrow f is effected by the switch 23a which is actuated by a programming member (not shown) on the knitting machine 1, when the knittingof the stocking fabric 12 has been finished.
  • the switch 23b is actuated i.e. stopping the motor 21, by the follower member 25 when the motor 21 has made the same number of revolutions as mentioned above, but in the opposite direction.
  • the follower member 25 comprises an endless screw spindle 25a, driven by the motor 21, a nut 25b mounted on the screw 25a.
  • the screw spindle 25a is prevented from rotating by a guide rod 250 disposed parallel to the axis of the screw spindle 25a, and along which the nut 25b may travel.
  • the two switches 22b and 23b control the stopping of the motor 21 which when it rotates in the direction of the arrow 8, or arrow f; respectively are disposed substantially at opposite ends of the screw spindle 25a.
  • control device for the thread delivery for the knitting machine 1 The functioning of the control device for the thread delivery for the knitting machine 1 is as follows:
  • the initial speed V of the thread is controlled by means of the. speed variation member 19 of the speed variator 18.
  • a stocking fabric of a certain denier is made, that is to say, a fabric in which the length of thread taken up per mesh is a predetermined constant and the transmission ratio between the rotational speed of the hollow cylinder 2'and the roller 14 of the thread fumisher 15 is constant.
  • the control cam 10 through sensor 7 sensor 7.
  • the sensor 7 has a vertical arm which is guided causes the progressive reduction of 'the diameter of the stocking along its length, especially in the part corresponding to the calf and towards the heel of the stocking.
  • the control cam closes the switch 22a which causes, via the control box 24, the motor 21 to rotate in the direction of the arrow f so that the transmission ratio is progressively reduced.
  • the roller 14 of the fumisher 15 turns more and more slowly and supplies thread at a progressively reduced rate, but at a constant tension, which is suited to the knitting of the part of the stocking corresponding to the calf.
  • the nut b entrained by the screw spindle 25a of the follower member 25 is displaced' downwards until it closes the switch 221; which stops the motor 21.
  • the thread 15 is then supplied at a constant speed V which is slower than the speed V in other words, the decreasing variation in the speed is effected during the operation of the progressive locking means 5, so that the variation of the speed and the duration over which it occurs are constant regardless of speed V,.
  • the speed variator 18 is returned to its starting position during the knitting of the point and of the welt of the next stocking these parts being made with other threads than those used for the stocking.
  • the motor 21 is actuated to revolve in the reverse direction, that is to say, in the direction of the arrow j ⁇ , by the closure of the switch 23a, which is actuated at the end of the stocking by a programming member;
  • the screw spindle 25a turns in the reverse direction and moves the nut 25b towards the switch 23b which stops the motor 21 when the nut reaches it.
  • the speed variator 18 is thereby returned to its starting position and the thread 15 may again be delivered at the speed V by the thread fumisher 15.
  • the invention is not limited to endless stocking knitting machines and may be used in conjunction with knitting machines which produce articles where changes in the amount of thread used and the thread tension are necessary.
  • a device for controlling the delivery of thread to a knitting machine having a needle cylinder, a programming element, progressive locking means, a sensor cooperating with a control cam, to vertically position the needle cylinder, and a thread delivery device for supplying a plurality of needles with thread as a function of the position of the control cam
  • the device comprising a speed variator, mechanical transmission which is adapted to be disposed between the cylinder and the thread delivery device of the knitting machine, and to which the speed variator is operatively connected, a motor operatively connected to control the variator, said motor being rotatable in forward and reverse directions, a first starting switch and a first stopping switch which, in operation, start and stop the motor in the forward direction respectively, a second starting switch and a second stopping switch which, in operation, start and stop the motor in the reverse direction respectively, the first and second starting switches being adapted to be operated by the control cam and the programming element of the knitting machine respectively and a follower member whose travel corresponds to a predetermined length of a t
  • the follower member comprises an endless screw or gindle driyiggly connected to the motor, a nut mounted on c said spin e and a guide rod arranged parallel to the screw or spindle and cooperating with the nut to prevent rotation thereof, first and second stopping switches being disposed substantially at 0pposite ends of the screw or spindle.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
US859416A 1968-09-23 1969-09-19 Device for controlling the delivery of thread to a knitting machine Expired - Lifetime US3580012A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR167161 1968-09-23

Publications (1)

Publication Number Publication Date
US3580012A true US3580012A (en) 1971-05-25

Family

ID=8654824

Family Applications (1)

Application Number Title Priority Date Filing Date
US859416A Expired - Lifetime US3580012A (en) 1968-09-23 1969-09-19 Device for controlling the delivery of thread to a knitting machine

Country Status (9)

Country Link
US (1) US3580012A (enrdf_load_stackoverflow)
BE (1) BE738638A (enrdf_load_stackoverflow)
CH (1) CH513268A (enrdf_load_stackoverflow)
CS (1) CS152332B2 (enrdf_load_stackoverflow)
DE (1) DE1945000A1 (enrdf_load_stackoverflow)
ES (1) ES371758A1 (enrdf_load_stackoverflow)
FR (1) FR1585278A (enrdf_load_stackoverflow)
GB (1) GB1275934A (enrdf_load_stackoverflow)
NL (1) NL6913847A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4002044A (en) * 1973-12-18 1977-01-11 Establissements A. Chromarat & Cie Yarn stop motion
US20080083472A1 (en) * 2006-10-06 2008-04-10 Groz-Beckert Kg Shaft transmission for a weaving machine

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE8502436D0 (sv) * 1985-05-17 1985-05-17 Iro Ab Anordning for positiv matning av ett foretredesvis elastiskt garn vid en stickmaskin, foretredesvis en strumpstickmaskin
GB8621751D0 (en) * 1986-09-10 1986-10-15 Profile For Sport Ltd Knitting machines
IT1229867B (it) * 1989-02-10 1991-09-13 Savio Spa Procedimento perfezionato per la produzione di calzetteria di pregio in macchine circolari da maglieria e dispositivo per la sua realizzazione

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB490838A (en) * 1935-11-25 1938-08-16 Franz Meiwald Knitting machine more particularly for the manufacturing of knitted threads and knitted hose
US2186814A (en) * 1934-08-16 1940-01-09 Herman Epstein Textile fabric manufacture
US2541192A (en) * 1947-07-22 1951-02-13 William A Blake Yarn feed control system
GB916465A (en) * 1959-08-07 1963-01-23 Hosiery & Allied Trades Res As Improvements in or relating to circular knitting machines
US3225570A (en) * 1963-06-27 1965-12-28 Singer Co Automatic stitch control
GB1120227A (en) * 1964-10-10 1968-07-17 Hosiery & Allied Trades Res As Improvements in textile yarn feeding device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2186814A (en) * 1934-08-16 1940-01-09 Herman Epstein Textile fabric manufacture
GB490838A (en) * 1935-11-25 1938-08-16 Franz Meiwald Knitting machine more particularly for the manufacturing of knitted threads and knitted hose
US2541192A (en) * 1947-07-22 1951-02-13 William A Blake Yarn feed control system
GB916465A (en) * 1959-08-07 1963-01-23 Hosiery & Allied Trades Res As Improvements in or relating to circular knitting machines
US3225570A (en) * 1963-06-27 1965-12-28 Singer Co Automatic stitch control
GB1120227A (en) * 1964-10-10 1968-07-17 Hosiery & Allied Trades Res As Improvements in textile yarn feeding device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4002044A (en) * 1973-12-18 1977-01-11 Establissements A. Chromarat & Cie Yarn stop motion
US20080083472A1 (en) * 2006-10-06 2008-04-10 Groz-Beckert Kg Shaft transmission for a weaving machine
US7594522B2 (en) * 2006-10-06 2009-09-29 Groz-Beckert Kg Shaft transmission for a weaving machine

Also Published As

Publication number Publication date
CH513268A (fr) 1971-09-30
GB1275934A (en) 1972-06-01
NL6913847A (enrdf_load_stackoverflow) 1970-03-25
DE1945000A1 (de) 1970-04-02
FR1585278A (enrdf_load_stackoverflow) 1970-01-16
BE738638A (enrdf_load_stackoverflow) 1970-02-16
ES371758A1 (es) 1971-11-16
CS152332B2 (enrdf_load_stackoverflow) 1973-12-19

Similar Documents

Publication Publication Date Title
GB1023473A (en) Improvements in and relating to knitting machines and apparatus and method for controlling the stitch lengths of knitted fabrics
US3580012A (en) Device for controlling the delivery of thread to a knitting machine
US2158547A (en) Yarn furnishing device
US2534459A (en) Strand feeding mechanism
US3303671A (en) Yarn feeding means for knitting machines
GB1479368A (en) Machine and method for producing knit-goods with a pile or loop-pile surface
US1726568A (en) Knitting machine
US3700153A (en) Yarn feeder for a knitting machine
EP0257036B1 (en) Yarn feeding device
US668833A (en) Knitting-machine.
US2182295A (en) Automatic variable output feeder for shaped knitted articles
US2199263A (en) Strand-feeding device for knitting and like machines
US2400526A (en) Knitting machine
US3722231A (en) Method and means for circular knitting
US3451603A (en) Method and device for adjusting the tension of yarn fed to a yarn-consuming machine
US1420530A (en) Yarn control for knitting machines
US2251222A (en) Fabric take-up
US3290902A (en) Knitting apparatus and method
JPH0136935Y2 (enrdf_load_stackoverflow)
SU1044692A1 (ru) Устройство дл подачи нити в петлеобразующую систему трикотажной машины
US4993241A (en) Method of knitting
US3307378A (en) Knitting apparatus
US2087820A (en) Machine for knitting fabric with rubber inlay
US3390552A (en) Apparatus for feeding elastic yarn
US1138717A (en) Yarn-take-up mechanism for knitting-machines.