EP0170993A2 - Nadelauswahlvorrichtung für eine Rundstrickmaschine, insbesondere für eine Strumpfstrickmaschine - Google Patents

Nadelauswahlvorrichtung für eine Rundstrickmaschine, insbesondere für eine Strumpfstrickmaschine Download PDF

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Publication number
EP0170993A2
EP0170993A2 EP85109372A EP85109372A EP0170993A2 EP 0170993 A2 EP0170993 A2 EP 0170993A2 EP 85109372 A EP85109372 A EP 85109372A EP 85109372 A EP85109372 A EP 85109372A EP 0170993 A2 EP0170993 A2 EP 0170993A2
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EP
European Patent Office
Prior art keywords
intermediate drive
selection
drive elements
levers
knitting 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Withdrawn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
EP85109372A
Other languages
English (en)
French (fr)
Other versions
EP0170993A3 (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 EP0170993A2 publication Critical patent/EP0170993A2/de
Publication of EP0170993A3 publication Critical patent/EP0170993A3/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Withdrawn legal-status Critical Current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
    • D04B15/66—Devices for determining or controlling patterns ; Programme-control arrangements
    • D04B15/68—Devices for determining or controlling patterns ; Programme-control arrangements characterised by the knitting instruments used
    • D04B15/78—Electrical devices

Definitions

  • the present invention relates to a needle selecting device for a circular knitting machine, in particular a hose knitting machine.
  • needle selecting devices which consist, in general, in a plurality of selection levers which are moved to interfere with the jack butts such as to move the jacks either to an operative position or an inoperative one, according to the type of device.
  • W hich comprises a plurality of selection levers in superimposed relationship and being individually journalled to a common structure, said levers being movable from a first position whereat one end thereof is located on the same level as the jack butts so as to interfere with and push them to a position where they cannot be brought to knit, to a position whereat that end is located intermediate to the jack butts so as not to interfere therewith.
  • Switching from the second position, to which there corresponds an inoperative position of the jack, to the first position, is accomplished by actuating intermediate drive elements which are caused to interfere with the remote ends from the jacks of the selection levers part-rotating them.
  • each of the intermediate elements is accomplished through an electromagnet controlled in conformity with a program to shift the corresponding intermediate drive element.
  • the intermediate drive elements comprise rod-like elements movable along their axes which have one end connected to an electromagnet and the opposite end shaped to present a geometric profile mating with a corresponding profile carried on the respective selection lever.
  • the fact of assigning the selection lever return to return bias springs may involve problems with the time of actuation of the return movement where the device is to operate at increasingly higher speeds.
  • each rod-like element with the end of the corresponding selection lever taking place along a parallel direction to the direction of a component of the force exchanged between the selection lever and jack butt, it may occur that, during the actuation phase, with high speeds, wear, or improper adjustment of the rod-like element, the same partly disengages itself thereby rendering the device ineffective.
  • a needle selecting device for a circular knitting machine in particular for a hose knitting machine, comprising a plurality of superimposed selection levers journalled individually at an intermediate portion thereof to a common structure and being selectively movable from a first position whereat one end thereof is located on the level with the machine jack butts to interfere therewith and push the respective jacks into an inoperative position, and a second position whereat that same end is located on an intermediate level between the jack butts so as not to interfere therewith
  • said selection levers being actuated by intermediate drive elements set into motion by programmed actuator means, in particular of the electromagnet type, characterized in that it comprises two alternately actuated actuator means for each of said intermediate drive elements at all times in engagement with at least one of said selection levers, each of said intermediate drive elements, being positionable for assuming at least two states of engagement, with at least one of said selection levers, said two states of engagement defining said first and second positions of
  • a device comprises a housing structure 1 for a plurality of selection levers 2 which are superimposed and journalled individually at an intermediate portion thereof, as by means of respective pivot pins 3, to two uprights 4 of the housing structure.
  • the housing structure 1 is placed on a fixed supporting surface 5 arranged circumferentially on the outside of the needle cylinder 6 of a circular knitting machine.
  • the pins 3 are spaced apart from one another by a distance corresponding to the various levels of the butts 7 provided on the rocking jacks 8 of traditional configuration.
  • the selection levers are oscillably movable about the axes of the pins 3 and selectively from a first position, or working position, whereat their active end 2a is located on the same level as the jack butts, to a second position, or rest'position, whereat the active end 2a is located at an intermediate level between two adjacent butts.
  • the active end 2a has, of course, a smaller thickness than the distance separating any two successive butts, so as not to interfere therewith while in the rest position.
  • each selection lever has a coupling end 2b with a peg 9 associated rigidly therewith, which extends along a substantially perpendicular axis to the longitudinal extension of the selection lever, the shape whereof is of special import to the invention, as explained hereinafter.
  • Each of these intermediate drive elements has, according to the invention, one end at all times engaged with the coupling end of a corresponding selection lever and configured to produce two states of engagement which may be alternated with each other for each of the intermediate drive elements with a respective selection lever.
  • the end of the intermediate drive element would have a configuration whereby it can be made to slide over the surface of the peg 9, which has correspondingly raised zones and depressed zones, thus causing the peg 9 to move and oscillate the selection lever 2 about the pin 3, thus ensuring switching from the working position to the rest position, and vice versa, whilst maintaining engagement of the intermediate drive element with the respective selection lever.
  • the peg 9 in the embodiment shown, it has a first cylindrical section 9a associated rigidly in the proximity of the coupling end of the selection lever, a second cylindrical section 9b of smaller diameter than the first, and a third cylindrical section 9c having the same diameter as the first.
  • the three cylindrical sections are coaxial with one another and united by frusto-conical connections.
  • the raised zones comprise the surfaces of the first and third cylindrical sections, while the depressed zones comprise the surface of the second cylindrical section.
  • That end of the intermediate drive element 10 which engages with the peg 9 has a forked portion or bifurcation 13 for containing the peg 9, and the surfaces 10a in mutual contact with the peg are flat and parallel to one another and spaced apart by a distance which is substantially equal to the sum of the radii of the first cylindrical section and second cylindrical section.
  • suitable relieving surfaces 10b and bevels 10c are provided.
  • the sliding m6vement of the end of the drive element over the peg 9 is accomplished with the intermediate drive element being oscillated in a parallel plane to the axes of the pins 3 about the pivot shaft, and is controlled, according to the invention, by two actuator means, such as two electromagnets 14, which are alternately operable in conformity with a program. and act sideways on the intermediate drive element from opposed sides with respect to the oscillation axis of the drive element.
  • the surfaces 10a,-in mutual contact with the peg in the two states of engagement are substantially perpendicular to the oscillation axis of the intermediate element, thereby a backward or displacement movement of the intermediate element would be prevented owing to the action of the corresponding selection lever.
  • the device of this invention operates as follows.
  • the oscillating jacks are drawn out of the cylinder grooves, in a known manner, to move the butts to a position where they can interfere with the selection levers.
  • one of the two magnets is activated to partly rotate the intermediate drive element corresponding to it, causing the end engaged with the peg 9 to slide, and accordingly, varying the state of engagement with the corresponding selection lever which is rotated partially about the pin 3, to move the same into the working position.
  • the selection lever will interfere with the jack butt, or with the jacks that have the butt at the same level, to again push it into the inoperative position.
  • the other electromagnet is energized which acts on the same intermediate element.
  • a further advantage deriving from that the intermediate drive elements and selection levers are in contact at all times is a decrease in the device vibration.
  • a not negligible advantage, deriving from the absence of rearward motion and of elastic return elements, is that the selection is maintained even in the event of temporary absence of electric, power, as well as a lower power consumption to energize the electromagnets, since it is possible, as mentioned, to only energize them while switching from one position to the other.
  • the device herein is susceptible to many changes and modifications without departing from the scope of the inventive concept.
  • the response speed is of no concern, it could be possible to operate the intermediate drive elements by means of pneumatic actuating devices or traditional patterning drums.
  • the device which has been disclosed for simplicity with reference to a single cylinder machine, could be applied, of course, also to double-cylinder machines and cylinder-and-dial machines.
  • the materials used and the dimensions may vary according to requirements and the state of the art.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
EP85109372A 1984-08-09 1985-07-25 Nadelauswahlvorrichtung für eine Rundstrickmaschine, insbesondere für eine Strumpfstrickmaschine Withdrawn EP0170993A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT22292/84A IT1176604B (it) 1984-08-09 1984-08-09 Dispositivo per la selezione degli aghi in una macchina circolare per maglieria, in particolare una macchina per calze
IT2229284 1984-08-09

Publications (2)

Publication Number Publication Date
EP0170993A2 true EP0170993A2 (de) 1986-02-12
EP0170993A3 EP0170993A3 (de) 1987-10-28

Family

ID=11194267

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85109372A Withdrawn EP0170993A3 (de) 1984-08-09 1985-07-25 Nadelauswahlvorrichtung für eine Rundstrickmaschine, insbesondere für eine Strumpfstrickmaschine

Country Status (3)

Country Link
EP (1) EP0170993A3 (de)
JP (1) JPS6147856A (de)
IT (1) IT1176604B (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0252335A1 (de) * 1986-07-08 1988-01-13 LONATI S.p.A. Vorrichtung zum Auswählen von Nadeln an einer Rundstrickmaschine, insbesondere für Strümpfe
EP0279309A2 (de) * 1987-02-16 1988-08-24 LONATI S.p.A. Elektromagnetisches Hochgeschwindigkeitsbedienungselement, insbesondere für Auswahlvorrichtungen an Strumpfstrickmaschinen und dergleichen
EP0279310A2 (de) * 1987-02-16 1988-08-24 LONATI S.p.A. Nadelauswahlvorrichtung an Rundstrickmaschinen für Strümpfe und dergleichen

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63167187U (de) * 1987-04-21 1988-10-31
JPS647282U (de) * 1987-07-02 1989-01-17
US4972686A (en) * 1987-10-07 1990-11-27 Nagata Seiki Kabushiki Kaisha Electromagnetic needle selector for circular knitting machines
JP2003070613A (ja) * 2001-08-31 2003-03-11 Ishino Seisakusho:Kk 循環型飲食物搬送装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH528622A (de) * 1969-10-21 1972-09-30 Singer Alemannia Maschf Vorrichtung an einer Strick- oder Wirkmaschine zum Auswählen der Nadeln
DE2361283A1 (de) * 1972-12-12 1974-07-11 Wildt Mellor Bromley Ltd Mustersteuereinrichtung fuer eine strickmaschine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH528622A (de) * 1969-10-21 1972-09-30 Singer Alemannia Maschf Vorrichtung an einer Strick- oder Wirkmaschine zum Auswählen der Nadeln
DE2361283A1 (de) * 1972-12-12 1974-07-11 Wildt Mellor Bromley Ltd Mustersteuereinrichtung fuer eine strickmaschine

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0252335A1 (de) * 1986-07-08 1988-01-13 LONATI S.p.A. Vorrichtung zum Auswählen von Nadeln an einer Rundstrickmaschine, insbesondere für Strümpfe
EP0279309A2 (de) * 1987-02-16 1988-08-24 LONATI S.p.A. Elektromagnetisches Hochgeschwindigkeitsbedienungselement, insbesondere für Auswahlvorrichtungen an Strumpfstrickmaschinen und dergleichen
EP0279310A2 (de) * 1987-02-16 1988-08-24 LONATI S.p.A. Nadelauswahlvorrichtung an Rundstrickmaschinen für Strümpfe und dergleichen
EP0279310A3 (de) * 1987-02-16 1989-11-29 LONATI S.p.A. Nadelauswahlvorrichtung an Rundstrickmaschinen für Strümpfe und dergleichen
EP0279309A3 (de) * 1987-02-16 1990-01-31 LONATI S.p.A. Elektromagnetisches Hochgeschwindigkeitsbedienungselement, insbesondere für Auswahlvorrichtungen an Strumpfstrickmaschinen und dergleichen

Also Published As

Publication number Publication date
JPS6147856A (ja) 1986-03-08
EP0170993A3 (de) 1987-10-28
IT1176604B (it) 1987-08-18
IT8422292A0 (it) 1984-08-09

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