EP0224765A2 - Schloss zum Bewegen der Nadeln an einer Rundstrickmaschine und dergleichen - Google Patents

Schloss zum Bewegen der Nadeln an einer Rundstrickmaschine und dergleichen Download PDF

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Publication number
EP0224765A2
EP0224765A2 EP86115689A EP86115689A EP0224765A2 EP 0224765 A2 EP0224765 A2 EP 0224765A2 EP 86115689 A EP86115689 A EP 86115689A EP 86115689 A EP86115689 A EP 86115689A EP 0224765 A2 EP0224765 A2 EP 0224765A2
Authority
EP
European Patent Office
Prior art keywords
cam
needles
casting
descending
feed
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Withdrawn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
EP86115689A
Other languages
English (en)
French (fr)
Other versions
EP0224765A3 (de
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 EP0224765A2 publication Critical patent/EP0224765A2/de
Publication of EP0224765A3 publication Critical patent/EP0224765A3/de
Withdrawn legal-status Critical Current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
    • D04B15/32—Cam systems or assemblies for operating knitting instruments

Definitions

  • the present invention relates to a cam assembly for controlling the needles in a circular knitting machine and the like.
  • the heels of the needles or of the sliders which do not operate at said feed are kept in a track which passes below the corresponding casting-off cam and therefore. theoretically, they should not interfere with the descending portion followed instead by the heels corresponding to the needles which have captured the thread.
  • the main aim of the present invention is to eliminate the above described disadvantages by providing a cam assembly for controlling the needles in a circular knitting machine with which to avoid the collision of the heel of the needles, or of the sliders, which do not operate at a feed with the descending portion of the matching casting-off cam.
  • an object of the invention is to provide a cam assembly for controlling the needles which allows the machine high productive speeds without causing damage to the heels which engage therewith or breakage of the needles in the case of twin-cylinder machines.
  • a cam assembly for controlling the needles in a circular knitting machine and the like comprising at least one casting-off cam at a feed of the machine, characterized in that it comprises, upstream of said casting-off cam, according to the direction of rotation of the machine, an auxiliary descending cam having a descending portion, engageable with a control element for the needles which do not operate at said feed to carry said control element substantially below the lower end of the descending portion of said casting-off cam.
  • Fig. 1 illustrates a portion of the skirt of the cams, generally indicated by the reference numeral 1, as it is provided in current twin-cylinder machines for stockings.
  • the heels 8 of the sliders 20, the needles 21 of which must not capture the knitting at the feed being considered. are kept in a track termed "floating" and delimited by the cams 4 and 5.
  • the heels 8 after the cam 3 have the possibility of raising and collide with the lower portion of the descending section 7 of the casting-off cam 6.
  • a cam assembly according to the invention which is illustrated in Figs. 2 and 3 and is indicated by the reference numeral 10.
  • a cam assembly according to the invention which is illustrated in Figs. 2 and 3 and is indicated by the reference numeral 10.
  • an auxiliary descending cam 13 having a descending portion or tract 13a which is engageable with a needle controlling element, composed. in the case shown, of the heels of the sliders 20 which are accommodated in the floating track, so as to cause a slight lowering of the same to carry them below the lower end of the casting-off cam 6.
  • a needle controlling element composed. in the case shown, of the heels of the sliders 20 which are accommodated in the floating track, so as to cause a slight lowering of the same to carry them below the lower end of the casting-off cam 6.
  • the other cams which are left substantially as those illustrated in Fig. 1 and are therefore indicated by the same reference numerals.
  • the auxiliary descending cam 13 is provided with a descending portion 13a with tangents in the various points having inclinations, with respect to a horizontal plane, or to a plane perpendicular to the axis of the cylinders, which are smaller than the tangents of the points of the descending portion 7 of the casting-off cam 6.
  • the auxiliary descending cam 13, the casting-off cam 6 and the countercam 9 are mounted on a single cam-holder block, of a known kind, which is movable parallel to the axis of the cylinders to vary the density of the knitting.
  • portion 13b of the auxiliary descending cam 13 which faces the descending portion 7 of the casting-off cam 6 is advantageously provided with a profile which acts as a countercam for the heels of the sliders which have carried the needles to capture the thread at the feed being considered.
  • the arrangement of the auxiliary descending cam is performed so that the descending portion 13a is upstream of the cam 14 which in the upper cylinder causes the unloading of the knitting formed by the purl-working needles 15; in this manner, since the knitting is tensioned by the slight lowering of the sliders in the lower cylinder, this unloading operation is made easier.
  • Fig. 3 also illustrates the plate 16 for keeping in an open position the tabs of the needles which are to take knitting at the feed being considered.
  • the heels 8 of the sliders 20, which control the needles 21 which must not form knitting at the feed being considered, are in the floating track between the cams 4 and 5.
  • the heels 8 of the sliders 20 make contact with the auxiliary descending cam 13 and are lowered below the lower end of the casting-off cam 6 and therefore the impact of these heels with the cam 6 is avoided.
  • cam assembly according to the present invention has been described exclusively with reference to a twin-cylinder machine for stockings, wherein the problems described in the introduction of this description are most severely felt, but it is understood that a cam assembly provided according to the above described inventive concept, with the necessary variations for adapting, can be successfully provided also for single-cylinder machines, with large or small diameters, to overcome similar problems.
  • control element for the needles which engages with the auxiliary descending cam, will be composed of the heel itself of the various needles.
  • cam assembly thus conceived is susceptible to numerous modifications and variations, all of which are within the scope of the inventive concept; furthermore, all the details can be replaced by technically equivalent elements.
  • materials employed, as well as the dimensions may be any according to the requirements and to the state of the art.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
EP86115689A 1985-12-02 1986-11-12 Schloss zum Bewegen der Nadeln an einer Rundstrickmaschine und dergleichen Withdrawn EP0224765A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT23048/85A IT1186224B (it) 1985-12-02 1985-12-02 Serratura per il comando degli aghi in una macchina circolare per maglieria e simili
IT2304885 1985-12-02

Publications (2)

Publication Number Publication Date
EP0224765A2 true EP0224765A2 (de) 1987-06-10
EP0224765A3 EP0224765A3 (de) 1987-10-21

Family

ID=11203241

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86115689A Withdrawn EP0224765A3 (de) 1985-12-02 1986-11-12 Schloss zum Bewegen der Nadeln an einer Rundstrickmaschine und dergleichen

Country Status (3)

Country Link
EP (1) EP0224765A3 (de)
JP (1) JPS62133159A (de)
IT (1) IT1186224B (de)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2355052A1 (de) * 1973-11-03 1975-05-07 Wirkmaschinenbau Karl Marx Veb Vorrichtung zum steuern von maschenbildungselementen, insbesondere der nadeln einer rundstrickmaschine
DD115367A1 (de) * 1974-12-06 1975-09-20
DE2636008C3 (de) * 1976-08-11 1981-01-08 Mayer & Cie Gmbh & Co, 7470 Albstadt Rundstrickmaschine mit Nadelauswahleinrichtung

Also Published As

Publication number Publication date
EP0224765A3 (de) 1987-10-21
IT8523048A0 (it) 1985-12-02
JPS62133159A (ja) 1987-06-16
IT1186224B (it) 1987-11-18

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Inventor name: LONATI, FRANCESCO