EP2570534A1 - Mécanisme de formation de boucles et de relâchement et platines correspondantes pour machines de tricotage circulaire - Google Patents

Mécanisme de formation de boucles et de relâchement et platines correspondantes pour machines de tricotage circulaire Download PDF

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Publication number
EP2570534A1
EP2570534A1 EP11181629A EP11181629A EP2570534A1 EP 2570534 A1 EP2570534 A1 EP 2570534A1 EP 11181629 A EP11181629 A EP 11181629A EP 11181629 A EP11181629 A EP 11181629A EP 2570534 A1 EP2570534 A1 EP 2570534A1
Authority
EP
European Patent Office
Prior art keywords
loosening
loop forming
segment
ancillary
sinker
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Withdrawn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
EP11181629A
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German (de)
English (en)
Inventor
Tieh-Hsiung Pai
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.)
Pai Lung Machinery Mill Co Ltd
Original Assignee
Pai Lung Machinery Mill Co Ltd
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 Pai Lung Machinery Mill Co Ltd filed Critical Pai Lung Machinery Mill Co Ltd
Priority to EP11181629A priority Critical patent/EP2570534A1/fr
Publication of EP2570534A1 publication Critical patent/EP2570534A1/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Withdrawn legal-status Critical Current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
    • D04B15/14—Needle cylinders
    • 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
    • D04B15/06—Sinkers

Definitions

  • the present invention relates to a mechanism and elements of circular knitting machines and particularly to a mechanism and sinkers thereof for a circular knitting machine to aid knitting needles in loop forming and loosening.
  • a conventional loop forming and loosening mechanism la of a circular knitting machine includes a needle cylinder 4a to hold a plurality of needles 5a located vertically, a plurality of correcting troughs 41 above the needle cylinder 4a, a sinker tray 10a located at the circumference of the needle cylinder 4a with a plurality of horizontal sinker grooves 11a formed thereon each holding a sinker 3a, and a cam holder 2a located above the sinkers 3a to hold a plurality of cams 20a.
  • the cams 20a aim to drive the sinkers 3a to move reciprocally and horizontally.
  • Each sinker 3a includes a sliding segment 31a with a sliding portion 310a slidably located in one sinker groove 11a, a loop forming and loosening ancillary segment 32a extended upwards from one side of the sliding portion 310a and then extended outwards and including a horizontal and indented yarn pressing notch 320a to aid each needle 5a in loop forming and loosening, a passive segment 30a located above the sliding segment 31 a and driven by the cam 20a with a protrusion 300a extended upwards from the sliding portion 310a, and a correcting segment 34 extended downwards from the loop forming and loosening ancillary segment 32a.
  • the correcting segment 34 is inserted and confined in one correcting trough 41 to aid each needle 5a to accurately form or loosen a loop. Hence when the sinker 3a is moved reciprocally and horizontally the left and right lateral sides and bottom side of the correcting segment 34 generate contact friction due to confinement of the correcting trough 41.
  • the primary object of the present invention is to solve the aforesaid disadvantages by providing a loop forming and loosening mechanism for circular knitting machines to simplify fabrication of needle cylinder, reduce labor and material costs, improve quality and production yield of the needle cylinder, reduce abrasion of sinkers, enhance performance of the mechanism and increase lifespan of the sinkers.
  • the loop forming and loosening mechanism includes a needle cylinder to hold a plurality of needles located vertically, a sinker tray located at the circumference of the needle cylinder with a plurality of horizontal sinker grooves formed thereon each holding a sinker, and a cam holder located above the sinkers to hold a plurality of cams.
  • Each cam has a first guide track and a second guide track to drive the sinkers to move horizontally.
  • Each sinker includes a sliding segment with a sliding portion slidably located in each sinker groove, a loop forming and loosening ancillary segment extended upwards from one side of the sliding portion and then extended outwards and including a horizontal and indented yarn pressing notch to aid the needle to form or loosen loops that includes a first ancillary edge and a second ancillary edge respectively at an upper side and a lower side, a passive segment located above the sliding segment and driven by the cam with a protrusion extended upwards from the sliding portion and spaced from the loop forming and loosening ancillary segment, and an indented abrasion-reducing space located at a lateral side of the sliding portion and below the loop forming and loosening ancillary segment.
  • the loop forming and loosening ancillary segment can move directly and horizontally above the needle cylinder.
  • the sinker has a threshold edge at a boundary between a lower side of the loop forming and loosening ancillary segment and an upper side of the abrasion-reducing space.
  • the threshold edge is preferably forming a gap with the needle cylinder.
  • the protrusion has a shrunk guiding side opposing to one lateral side of the loop forming and loosening segment, and the loop forming and loosening segment has an extended guiding side opposing to one lateral side of the protrusion; the first guide track faces the shrunk guiding side, and the second guide track faces the extended guiding side.
  • the loop forming and loosening mechanism has a yarn feeding aperture suspended above the sinkers which are located between the needles and cam holder.
  • the invention also provides a sinker for circular knitting machines that includes a sliding segment with a sliding portion, a loop forming and loosening ancillary segment extended upwards from one side of the sliding portion and then extended outwards and including a horizontal and indented yarn pressing notch which has a first ancillary edge and a second ancillary edge respectively at an upper side and a lower side, a passive segment located above the sliding segment with a protrusion extended upwards from the sliding portion and spaced from the loop forming and loosening ancillary segment, and an indented abrasion-reducing space located at a lateral side of the sliding portion and below the loop forming and loosening ancillary segment.
  • the sinker has a threshold edge at a boundary between a lower side of the loop forming and loosening ancillary segment and an upper side of the abrasion-reducing space.
  • the protrusion has a shrunk guiding side opposing to one lateral side of the loop forming and loosening segment, and the loop forming and loosening segment has an extended guiding side opposing to one lateral side of the protrusion.
  • the present invention aims to provide a loop forming and loosening mechanism 1 for circular knitting machines. It includes a needle cylinder 4 to hold a plurality of needles 5 located vertically, a sinker tray 10 located at the circumference of the needle cylinder 4 with a plurality of horizontal sinker grooves 11 formed thereon each holding a sinker 3, and a cam holder 2 located above the sinkers 3 to hold a plurality of cams 20.
  • Each cam 20 has a first guide track 21 and a second guide track 22 to drive the sinkers 3 to move horizontally.
  • each sinker 3 includes a sliding segment 31 with a sliding portion 310 slidably located in one sinker groove 11, a loop forming and loosening ancillary segment 32 extended upwards from one side of the sliding portion 310 and then extended outwards and including a yarn pressing notch 320 indented horizontally to aid each needle 5 to form or loosen loops that includes a first ancillary edge 321 and a second ancillary edge 322 respectively at an upper side and a lower side, a passive segment 30 located above the sliding segment 31 and driven by the cam 20 with a protrusion 300 extended upwards from the sliding portion 310 and spaced from the loop forming and loosening ancillary segment 32, preferably extended upwards from another side of the sliding portion 310, and an indented abrasion-reducing space 33 located at a lateral side of the sliding portion 310 and below the loop forming and loosening ancillary segment 32.
  • the sinker 3 has a threshold edge 323 at a boundary between a lower side of the loop forming and loosening ancillary segment 32 and an upper side of the abrasion-reducing space 33.
  • the threshold edge 323 is preferably spaced from the needle cylinder 4 by a gap, i.e. the threshold edge 323 may also touch the upper edge of the needle cylinder 4 while it is moved horizontally.
  • the threshold edge 323 touches the upper edge of the needle cylinder 4 during the horizontal movement the resulting contact forms a much smaller friction surface than the conventional technique does.
  • the protrusion 300 has a shrunk guiding side 301 opposing to one lateral side of the loop forming and loosening ancillary segment 32, and the loop forming and loosening ancillary segment 32 has an extended guiding side 302 opposing to one lateral side of the protrusion 300.
  • the first guide track 21 faces the retracted guiding side 301
  • the second guide track 22 faces the forward extended guiding side 302.
  • the forward extended guiding side 302 may also be formed on another lateral side of the protrusion 300, namely, as long as it faces the second guide track 22.
  • a yarn feeding aperture 6 is provided to suspend above the sinkers 3 which are located between the needles 5 and cam holder 2 to continuously feed a yarn (not shown in the drawings) to the needles 5 and sinkers 3 to perform knitting operation.
  • the loop forming and loosening mechanism of the invention can simplify fabrication of the needle cylinder, reduce labor and material costs, improve quality and production yield of the needle cylinder, and also reduce abrasion of the sinkers. All these can enhance the performance of the mechanism and increase lifespan of the sinkers.
  • the present invention also provides a sinker for circular knitting machines.
  • the sinker 3 includes a sliding segment 31 which has a sliding portion 310, a loop forming and loosening ancillary segment 32 extended upwards from one side of the sliding portion 310 and then extended outwards and including a yarn pressing notch 320 indented horizontally that includes a first ancillary edge 321 and a second ancillary edge 322 respectively at an upper side and a lower side, a passive segment 30 located above the sliding segment 31 with a protrusion 300 extended upwards from the sliding portion 310 and spaced from the loop forming and loosening ancillary segment 32, preferably extended upwards from another side of the sliding portion 310, and an indented abrasion-reducing space 33 located at a lateral side of the sliding portion 310 and below the loop forming and loosening ancillary segment 32.
  • the sinker 3 also has a threshold edge 323 at a boundary between a lower side of the loop forming and loosening ancillary segment and an upper side of the abrasion-reducing space 33.
  • the protrusion 300 has a shrunk guiding side 301 opposing to one lateral side of the loop forming and loosening ancillary segment 32, and the loop forming and loosening ancillary segment 32 has an extended guiding side 302 opposing to one lateral side of the protrusion 300.
  • the sinker thus formed can reduce wearing and improve the performance of the mechanism and the lifespan thereof.
  • FIGS. 4 through 6 Please refer to FIGS. 4 through 6 for operating conditions of the loop forming and loosening mechanism 1.
  • the sinker 3 incorporates with the needle 5 to move horizontally and reciprocally as shown in FIGS. 5 and 6 .
  • the indented abrasion-reducing space 33 is formed below the loop forming and loosening ancillary segment 32, the loop forming and loosening ancillary segment 32 not only can aid the loops in forming and loosening, but also can greatly reduce abrasion of the sinker.
  • the performance of the mechanism improves and the lifespan of the sinker also can be enhanced.
  • a sinker 3 includes a sliding segment 31 with a sliding portion 310 slidably located in a sinker groove 11, a loop forming and loosening ancillary segment 32 extended upwards from one side of the sliding portion 310 and then extended outwards, a passive segment 30 located above the sliding segment 31 and driven by a cam 20, and an indented abrasion-reducing space 33 located at a lateral side of the sliding portion 310 and below the loop forming and loosening ancillary segment 32.
  • the loop forming and loosening ancillary segment 32 can move directly and horizontally above a needle cylinder 4.
  • the loop forming and loosening mechanism for circular knitting machines of the invention can simplify fabrication of the needle cylinder 4, reduce labor and material costs, improve quality and production yield of the needle cylinder 4, and also reduce abrasion of the sinker 3, thus can improve performance of the mechanism and enhance lifespan of the sinker 3.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
EP11181629A 2011-09-16 2011-09-16 Mécanisme de formation de boucles et de relâchement et platines correspondantes pour machines de tricotage circulaire Withdrawn EP2570534A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11181629A EP2570534A1 (fr) 2011-09-16 2011-09-16 Mécanisme de formation de boucles et de relâchement et platines correspondantes pour machines de tricotage circulaire

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11181629A EP2570534A1 (fr) 2011-09-16 2011-09-16 Mécanisme de formation de boucles et de relâchement et platines correspondantes pour machines de tricotage circulaire

Publications (1)

Publication Number Publication Date
EP2570534A1 true EP2570534A1 (fr) 2013-03-20

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EP11181629A Withdrawn EP2570534A1 (fr) 2011-09-16 2011-09-16 Mécanisme de formation de boucles et de relâchement et platines correspondantes pour machines de tricotage circulaire

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EP (1) EP2570534A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110158230A (zh) * 2019-06-11 2019-08-23 福建省锐力精密机械有限公司 一种应用于单面圆机中带嘴口齿片的新型针筒

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2715824A (en) * 1952-12-17 1955-08-23 Stanley G Kranss Terry loop knitting machine and process
US3221521A (en) * 1962-10-18 1965-12-07 Singer Co Sinker arrangement for knitting machines
GB1293235A (en) * 1970-08-24 1972-10-18 Victor Joseph Lombardi Circular knitting machines

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2715824A (en) * 1952-12-17 1955-08-23 Stanley G Kranss Terry loop knitting machine and process
US3221521A (en) * 1962-10-18 1965-12-07 Singer Co Sinker arrangement for knitting machines
GB1293235A (en) * 1970-08-24 1972-10-18 Victor Joseph Lombardi Circular knitting machines

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110158230A (zh) * 2019-06-11 2019-08-23 福建省锐力精密机械有限公司 一种应用于单面圆机中带嘴口齿片的新型针筒
CN110158230B (zh) * 2019-06-11 2024-03-22 福建省锐力精密机械有限公司 一种应用于单面圆机中带嘴口齿片的新型针筒

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