EP0107849A2 - Métier à tricoter circulaire à cylindre et plateau, notamment pour le tricotage des bas - Google Patents

Métier à tricoter circulaire à cylindre et plateau, notamment pour le tricotage des bas Download PDF

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Publication number
EP0107849A2
EP0107849A2 EP83110585A EP83110585A EP0107849A2 EP 0107849 A2 EP0107849 A2 EP 0107849A2 EP 83110585 A EP83110585 A EP 83110585A EP 83110585 A EP83110585 A EP 83110585A EP 0107849 A2 EP0107849 A2 EP 0107849A2
Authority
EP
European Patent Office
Prior art keywords
dial
rod
cylinder
connection rod
machine
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.)
Withdrawn
Application number
EP83110585A
Other languages
German (de)
English (en)
Other versions
EP0107849A3 (fr
Inventor
Francesco Lonati
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.)
Lonati SpA
Original Assignee
Lonati SpA
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 Lonati SpA filed Critical Lonati SpA
Publication of EP0107849A2 publication Critical patent/EP0107849A2/fr
Publication of EP0107849A3 publication Critical patent/EP0107849A3/fr
Withdrawn legal-status Critical Current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
    • D04B15/94—Driving-gear not otherwise provided for
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B9/00—Circular knitting machines with independently-movable needles
    • D04B9/42—Circular knitting machines with independently-movable needles specially adapted for producing goods of particular configuration
    • D04B9/46—Circular knitting machines with independently-movable needles specially adapted for producing goods of particular configuration stockings, or portions thereof

Definitions

  • a machine of this general type is disclosed in European Patent Appln. N. 82103667.0 filed on April 29, 1982 by this same Applicant.
  • the rod which is arranged to extend coaxially with the-needle cylinder and dial, is movable axially between said two positions by an air-operated means located above the machine.
  • the rod has a chamfered lower end adapted to penetrate an axial bore in an entrainment element rigid with the cylinder, and to pressure engage with a cross pin partly inserted in said bore, so as to establish a rigid cylinder-to-dial connection.
  • the tubular knitted fabric is deposited progressively onto the entrainment element, being held there by the rod which remains inside the fabric tube. Disengagement of the rod from the entrainment element enables the fabric to be released and slide down along an incline of the entrainment element.
  • the machine of the cited patent application has shown some practical disadvantages, owing in part to the length of the rod inside the cylinder being required to permit the formation of a certain quantity of tubular fabric before the same can be held on the entrainment element. That length may bring about some difficulties when removing the rod for cylinder checking or servicing purposes. Also the type of engagement with the entraining element may result in the product jamming with the members engeed. Knitting requirements would make a thinner rod desirable, although excessive thinning thereof could jeopardize the positive nip between the rod and entrainment element, thus no longer ensuring an accurate timing of the dial and cylinder on account of the excessively small surface areas of mutual engagement. Further, disengagement and raising of the rod to enable the knitted fabric to be discharged, as well as renewed engagement for the subsequent knitting, require a relatively long time, which results in the reduction of the machine output rate.
  • the two arms take a downwards sloping position of disengagement from the cylinder to permit the fabric discharging, and in the other position, take a radial position and engage with teeth rigid with the cylinder inner wall to drive the dial with the cylinder.
  • a further object of the invention is to provide a machine as indicated, which can advantageously do without so-called anti-twist devices, that is devices effective to prevent twisting of the fabric with respect to the cylinder as the knitted fabric is being formed.
  • connection rod is journalled on the dial structure about an axis perpendicular to the axis of the dial and needle cylinder and has a substantially longer length than the diameter dimension of the needle cylinder, said connection rod being movable between a disengagement position substantially coaxial with said needle cylinder and a position of engagement with a longitudinal groove in the needle cylinder interior.
  • the rod is no longer required to perform an axial stroke, but just a short oscillation to move from one position into the other, which affords a significant reduction in operation time, as well as a reduction in the downtime connected with the discharging of the knitted fabric.
  • the axial rest position of the rod allows retention of the advantages afforded by the machine according to the cited patent application in connection with removal of the rod through the top to gain access to the machine interior, but with the added advantage that the rod may now be made shorter, thereby the rod has a shorter removal stroke and consequently a shorter load-bearing structure on top of the machine.
  • the engagement of the rod end with the cylinder groove makes the provision of a special entrainment element in the machine unnecessary and ensures a more positive timing because the engagement is led back to a lever arm in a ratio of nearly 1:1 to the cylinder.
  • the absence of the entrainment element moreover, favors the fabric discharging, which can take place more rapidly.
  • the engagement position whereat the rod is inclined with respect to the axial direction, advanteously provides a stop for the downwardly moving fabric which,being set to rest on the rod while being knitted, is driven rotatively by the rod itself, thereby there is no risk of snarling taking place, and this without resorting to any auxiliary means.
  • the axis of rotation of the connection rod is located off centered with respect to the axis of the cylinder and dial, thereby the rod actuation between said two positions may simply occur by shifting axially an actuation rod extending coaxially with the machine and being journalled at the bottom directly on the connection rod, without utilizing any articulated parallelogram type of arrangement.
  • a cylinder-and-dial circular knitting machine as particularly useful in hosiery applications, comprises, in a manner known per se, a stationary structure 1 which carries rotatively a needle cylinder 2 driven by means of a driveshaft 3 via a bevel gear pair 4.
  • a stationary structure 1 which carries rotatively a needle cylinder 2 driven by means of a driveshaft 3 via a bevel gear pair 4.
  • a dial 5 Located above the cylinder 2 is a dial 5,carried rotatably on a non-rotatable supporting structure 6, which structure also supports a plate 7 controlling needles or hooks of the dial 5, not shown.
  • connection rod 8 For rotatively driving the dial 5, there is provided a connection rod 8 extending inside the cylinder 2 and being rotatively connected to the dial 5 and movable between a position of engagement with the cylinder 2 and a position of disengagement from the cylinder 2 whereat the knitted fabric 9 may be discharged from the machine.
  • the pivot axis 10 of the connection rod 8 is offcentered relatively to the axis 12 of the machine, i.e. does not contain the axis 12.
  • This feature enables the rod 8 to be actuated in a specially simple fashion.
  • the body 13 of the dial 6, which has the traditional crater-like shape penetrating the cylinder 2 and is of hollow construction at the portion inserted into the cylinder 2 and open at the bottom for the rod 8 to pass therethrough, is penetrated by the lower end of an actuation rod 14 which extends coaxially with the machine and is connected to the upper portion of the connection rod 8 through a swivel joint 15 whose axis is parallel to the pivot axis 10 of the rod 8.
  • notches 31 Provided in the groove 29 are mutually spaced apart notches 31, whereinto a dog 32, pivoted to one end of a small control lever 33, may be inserted, said control lever being journalled on the sleeve 27 about an axis perpendicular to the sleeve own axis.
  • a spring 34 acting on the end of the lever 33 opposite to that carrying the dog 32, tends to hold the dog 32 in engagement with one of the notches 31.
  • the involved-time periods are specially short,thanks to the very small stroke of the actuation rod 14, and there is no danger of the fabric 9 being caught by an entrainment element.
  • a very short angular stroke length may be provided, and accordingly, a very short time period, to move from the engagement position into the disengagement one, contrary to the devices of the cited US patents, wherein the stroke length of the engagement arms is much longer.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
EP83110585A 1982-10-29 1983-10-22 Métier à tricoter circulaire à cylindre et plateau, notamment pour le tricotage des bas Withdrawn EP0107849A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2401682 1982-10-29
IT24016/82A IT1153330B (it) 1982-10-29 1982-10-29 Macchina circolare per maglieria a cilindro e platorello, in particolare atta alla fabbricazione di calze

Publications (2)

Publication Number Publication Date
EP0107849A2 true EP0107849A2 (fr) 1984-05-09
EP0107849A3 EP0107849A3 (fr) 1986-03-19

Family

ID=11211489

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83110585A Withdrawn EP0107849A3 (fr) 1982-10-29 1983-10-22 Métier à tricoter circulaire à cylindre et plateau, notamment pour le tricotage des bas

Country Status (4)

Country Link
EP (1) EP0107849A3 (fr)
JP (1) JPS59106549A (fr)
CS (1) CS253582B2 (fr)
IT (1) IT1153330B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0485924A1 (fr) * 1990-11-15 1992-05-20 S.F.I.M. S.r.l. Métier à tricoter circulaire à cylindre unique avec commande de cadran d'aiguilles amélioré, notamment pour la fabrication de chaussettes, bas et pareils

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB185158A (en) * 1921-04-27 1922-08-28 Oscar Frederick Charles Kunau Improvements in knitting machines
US1459466A (en) * 1921-10-06 1923-06-19 Thomas A Hodge Cooker
FR2438699A1 (fr) * 1978-10-13 1980-05-09 Lonati Cost Mecc Metier pour le tricotage d'une piece tubulaire, en particulier des bas

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB185158A (en) * 1921-04-27 1922-08-28 Oscar Frederick Charles Kunau Improvements in knitting machines
US1459466A (en) * 1921-10-06 1923-06-19 Thomas A Hodge Cooker
FR2438699A1 (fr) * 1978-10-13 1980-05-09 Lonati Cost Mecc Metier pour le tricotage d'une piece tubulaire, en particulier des bas

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0485924A1 (fr) * 1990-11-15 1992-05-20 S.F.I.M. S.r.l. Métier à tricoter circulaire à cylindre unique avec commande de cadran d'aiguilles amélioré, notamment pour la fabrication de chaussettes, bas et pareils
US5203184A (en) * 1990-11-15 1993-04-20 S.F.I.M. S.R.L. Single-cylinder circular machine with improved platen actuation, in particular for manufacturing socks, stockings and the like

Also Published As

Publication number Publication date
IT8224016A0 (it) 1982-10-29
JPS59106549A (ja) 1984-06-20
CS796583A2 (en) 1985-06-13
CS253582B2 (en) 1987-11-12
EP0107849A3 (fr) 1986-03-19
IT1153330B (it) 1987-01-14

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