EP0962567A2 - Circular knitting machine with flip-over half-dial - Google Patents

Circular knitting machine with flip-over half-dial Download PDF

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Publication number
EP0962567A2
EP0962567A2 EP99109272A EP99109272A EP0962567A2 EP 0962567 A2 EP0962567 A2 EP 0962567A2 EP 99109272 A EP99109272 A EP 99109272A EP 99109272 A EP99109272 A EP 99109272A EP 0962567 A2 EP0962567 A2 EP 0962567A2
Authority
EP
European Patent Office
Prior art keywords
dial
needle cylinder
axis
annular body
machine according
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Withdrawn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
EP99109272A
Other languages
German (de)
English (en)
French (fr)
Inventor
Francesco Lonati
Tiberio Lonati
Ettore Lonati
Fausto 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.)
Macchine Tessili Circolari MATEC SpA
Original Assignee
Macchine Tessili Circolari MATEC 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 Macchine Tessili Circolari MATEC SpA filed Critical Macchine Tessili Circolari MATEC SpA
Publication of EP0962567A2 publication Critical patent/EP0962567A2/en
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B9/00—Circular knitting machines with independently-movable needles
    • 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
    • D04B9/56—Circular knitting machines with independently-movable needles specially adapted for producing goods of particular configuration stockings, or portions thereof heel or toe portions

Definitions

  • the present invention relates to a circular knitting machine particularly for hosiery, with flip-over half-dial, particularly for producing tubular items closed at one of their longitudinal ends.
  • Conventional circular hosiery knitting machines have a flip-over half-dial which is arranged proximate to the upper end of the needle cylinder and is provided with means for engaging the yarns or loops of knitting. Said half-dial can be flipped over about a diametrical axis of the needle cylinder in order to face, with the engagement means, the needles of one half of the needle cylinder or the needles of the other half of the needle cylinder, so as to transfer the loops of knitting formed on the needles of one half of the needle cylinder to the needles of the other half of the needle cylinder, in order to allow to close, at one of its longitudinal ends, the tubular knitted item being formed.
  • this machine has been found to be susceptible of modifications mainly for improving the flip-over mechanism of the half-dial.
  • the aim of the present invention is accordingly to provide a circular knitting machine provided with a flip-over half-dial, having a half-dial flip-over mechanism which allows to flip the half-dial over without interrupting the production cycle of the machine.
  • an object of the invention is to provide a circular knitting machine with flip-over half-dial in which the half-dial does not substantially hinder the passage of the item being formed inside the needle cylinder.
  • Another object of the invention is to provide a circular knitting machine which, by not requiring an interruption of the production cycle in order to flip the half-dial over, can achieve a productivity which is comparable with that of conventional types of circular knitting machine which do not allow to close the item at one of its longitudinal ends.
  • a circular knitting machine with flip-over half-dial comprising a needle cylinder which can be actuated so as to rotate about its own axis and a half-dial provided with means for engaging the yarns or loops of knitting; said half-dial being able to flip over about a diametrical axis of the needle cylinder in order to face, with said engagement means, the needles of one half of the needle cylinder or the needles of the other half of the needle cylinder; means being provided for flipping said half-dial over about said diametrical axis; characterized in that said half-dial is arranged inside the needle cylinder and is pivoted, about said diametrical axis, to a supporting element which is rigidly coupled to said needle cylinder in the rotation about its axis; said flip-over means comprising a pusher which acts on command on said half-dial for its rotation about said diametrical axis through an angle of less than 90° and for its engagement with an
  • the machine according to the invention comprises a needle cylinder 2 which can be rotationally actuated about its own axis 2a with respect to the supporting structure of the machine.
  • a half-dial 3 which can flip over about a diametrical axis 4 of the needle cylinder in order to face one half or the other of the needle cylinder 2.
  • the half-dial 3 is provided with engagement means 5 for engaging and retaining loops of knitting or yarns knitted by the needles 6 of one half of the needle cylinder and for transferring them, by flipping over about the diametrical axis 4, to the needles 7 of the other half of the needle cylinder 2.
  • the machine has means for flipping the half-dial 3 over about the diametrical axis 4; said flip-over means, according to the invention, comprise a pusher 8 which acts on command on the half-dial 3 in order to make it rotate, about the diametrical axis 4, through an angle of less than 90° and so as to achieve its engagement with an abutment 9 which is adapted to complete the flip-over motion of the half-dial 3 about the diametrical axis 4 as a consequence of the rotation of said half-dial 3, together with the needle cylinder 2, about the axis 2a, with respect to the abutment 9.
  • the half-dial 3 is substantially composed of an annular body 10 which is arranged internally and coaxially to the needle cylinder 2 and has, on one half of the extension of its lateral surface, a semiannular expanded region 11 which accommodates the engagement means 5, which can be constituted, in a per se known manner, by hooks which can be actuated in a radial direction with respect to the needle cylinder 2 in order to engage and retain the loops of knitting or the yarns knitted by the needles 6 of a first half of the needle cylinder 2 and to transfer said loops or yarns to the needles 7 of the other or second half of the needle cylinder 2.
  • the annular body 10 is pivoted about the diametrical axis 4 to a supporting element which is rigidly coupled to the needle cylinder 2 for rotation about the axis 2a.
  • Said supporting element is constituted by a hollow cylindrical body 13 which is arranged coaxially inside the needle cylinder 2 and has, on its outer lateral surface, an axial slot 14 in which a key 15 engages; said key is fixed to the inner surface of the needle cylinder 2.
  • the cylindrical body 13 is rigidly coupled to the needle cylinder 2 for rotation about the axis 2a, but can be moved, parallel to the axis 2a, with respect to the needle cylinder 2.
  • a likewise cylindrical and hollow support 16 is arranged inside the cylindrical body 13 and lies coaxially to the needle cylinder 2.
  • the support 16 is supported, with bearings 17 interposed, by the cylindrical body 13 so that the cylindrical body 13 can rotate jointly with the needle cylinder 2 with respect to the support 16, which instead remains motionless as regards the rotary motion applied to the needle cylinder 2.
  • the support 16 can in any case perform a translatory motion together with the cylindrical body 13 and parallel to the axis 2a of the needle cylinder 2.
  • the half-dial 3 rests, with its annular body 10, on a hollow cylinder 18 which is arranged coaxially inside the support 16.
  • the hollow cylinder 18 is rigidly coupled to the support 16 as regards rotation about the axis 2a; i.e., it remains fixed while the needle cylinder 2 and the cylindrical body 13 rotate about the axis 2a, but it can perform a downward translatory motion, parallel to the axis 2a with respect to the support 16, in contrast with the action of elastic means constituted by springs 19 which support it.
  • the function of the hollow cylinder 18 is to support the annular body 10 of the half-dial 3, keeping the half-dial in a plane which is substantially perpendicular to the axis 2a, and to allow the half-dial 3 to flip over, about the diametrical axis 4, by moving downward in contrast with the action of the springs 19, as will become apparent hereinafter.
  • the pusher 8 is mounted on the support 16, and the abutment 9 is likewise mounted on the support 16.
  • the abutment 9 is located diametrically opposite with respect to the position occupied by the pusher 8.
  • the pusher 8 is arranged below the plane of arrangement of the half-dial 3 and acts on the lower face of the semiannular expanded region 11.
  • the pusher 8 is conveniently constituted by the piston of a fluid-driven cylinder 20, for example a single-acting pneumatic cylinder, formed inside the support 16.
  • the abutment 9 is constituted by a pin which is fixed to the support 16 and is orientated so that its axis lies radially with respect to the annular body 10. Said pin 9 is arranged below the plane of arrangement of the annular body 10 in the normal or flipped-over position, i.e., except during the transient flipping-over step, and faces the lateral surface of the annular body 10.
  • a passage 21 is formed in the lateral surface of the annular body 10, preferably in its outer lateral surface, and can be engaged by the pin 9 as a consequence of the partial rotation of the half-dial 3 produced by the pusher 8, so as to allow the pin 9 to pass onto the upper side of the annular body 10, completing the overturning of the half-dial 3, as will become apparent hereinafter.
  • the passage 21 is constituted by a slot formed in the outer lateral surface of the annular body 10, in a median position of the region that is not occupied by the expanded portion 11, and lies at an angle with respect to the upper face and lower face of the annular body 10.
  • the cylindrical body 13 can move, through actuation means which are not illustrated for the sake of simplicity, inside the needle cylinder 2 and parallel to the axis 2a, so as to allow to arrange the half-dial 3 at the upper end of the needle cylinder 2, when transferring the knitted loops or yarns from the needles 6 of the first half of the needle cylinder to the needles 7 of the second half of the needle cylinder, or to allow to arrange the half-dial 3 in at a lower level than the upper end of the needle cylinder 2 when this transfer is not required.
  • the half-dial 3 For transferring knitted loops or yarns from the needles 6 of a first half of the needle cylinder 2 to the needles 7 of the other half of the needle cylinder 2, the half-dial 3, by taking advantage of the fact that the cylindrical body 13 can perform a translatory motion along the axis 2a, is placed at the upper end of the needle cylinder 2 ( Figure 1).
  • the engagement means constituted by the hooks 5 are partially extracted from the half-dial 3 and are placed between the needles 6 of the first half of the needle cylinder 2, for example by means of cams which face, in an upward region, the expanded portion 11 and act on the heels 5a of the hooks 5.
  • the engagement means engage portions of the loops knitted by the needles 6 which, when retracted into the half-dial 3, retain said loop portions.
  • the expanded portion 11, with the engagement means 5 faces the needles 7 of the second half of the needle cylinder.
  • the engagement means 5 are then actuated in a per se known manner, for example in a manner similar to the one described in the above mentioned EPA No. 98105734.2, so as to release the previously retained loops onto the needles 7 of the second half of the needle cylinder 2.
  • the half-dial by taking advantage of the fact that the cylindrical body 13 can move along the axis 2a, can be moved into a recessed position inside the needle cylinder 2.
  • the machine according to the invention thanks to the particular half-dial flip-over mechanism, fully achieves the intended aim, since it can transfer the knitted loops of knitting or yarns from the needles of one half of the needle cylinder to the needles of the other half of the needle cylinder without interrupting the production cycle.
  • Another advantage of the machine according to the invention is that it allows to utilize all of the inside of the annular body of the half-dial for the passage of the item being formed.
  • the materials employed, as well as the dimensions, may be any according to requirements and to the state of the art.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
EP99109272A 1998-06-03 1999-05-27 Circular knitting machine with flip-over half-dial Withdrawn EP0962567A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT98MI001233A ITMI981233A1 (it) 1998-06-03 1998-06-03 Macchina circolare per maglieria o calzetteria dotata di semiplatorello ribaltabile
ITMI981233 1998-06-03

Publications (1)

Publication Number Publication Date
EP0962567A2 true EP0962567A2 (en) 1999-12-08

Family

ID=11380157

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99109272A Withdrawn EP0962567A2 (en) 1998-06-03 1999-05-27 Circular knitting machine with flip-over half-dial

Country Status (5)

Country Link
EP (1) EP0962567A2 (cs)
JP (1) JPH11350314A (cs)
KR (1) KR20000005867A (cs)
CZ (1) CZ195499A3 (cs)
IT (1) ITMI981233A1 (cs)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103966747A (zh) * 2014-05-23 2014-08-06 孟振晓 圆筒针织机及其错针位控制装置
CN103966748A (zh) * 2014-05-23 2014-08-06 孟振晓 针织机及其错针位控制装置

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103966747A (zh) * 2014-05-23 2014-08-06 孟振晓 圆筒针织机及其错针位控制装置
CN103966748A (zh) * 2014-05-23 2014-08-06 孟振晓 针织机及其错针位控制装置
CN103966747B (zh) * 2014-05-23 2016-02-24 孟振晓 圆筒针织机及其错针位控制装置
CN103966748B (zh) * 2014-05-23 2016-02-24 孟振晓 针织机及其错针位控制装置

Also Published As

Publication number Publication date
KR20000005867A (ko) 2000-01-25
JPH11350314A (ja) 1999-12-21
ITMI981233A1 (it) 1999-12-03
CZ195499A3 (cs) 1999-12-15

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