US3354673A - Sinker cover mechanism for circular knitting machines - Google Patents

Sinker cover mechanism for circular knitting machines Download PDF

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Publication number
US3354673A
US3354673A US478921A US47892165A US3354673A US 3354673 A US3354673 A US 3354673A US 478921 A US478921 A US 478921A US 47892165 A US47892165 A US 47892165A US 3354673 A US3354673 A US 3354673A
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United States
Prior art keywords
sinker
crown
cover
rolling bearing
peripheral rib
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.)
Expired - Lifetime
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US478921A
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English (en)
Inventor
Santoni Vinicio
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Individual
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Individual
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Publication date
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Publication of US3354673A publication Critical patent/US3354673A/en
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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
    • D04B15/06—Sinkers
    • 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
    • D04B15/24—Sinker heads; Sinker bars

Definitions

  • a circular stocking machine including a needle cylinder, a sinker crown secured thereto and formed with a peripheral rib, a radially-extending flange secured to the sinker crown and defining with the peripheral rib a circumferential groove around the sinker crown, a sinker cover overlying the sinker crown and radially spaced from its peripheral rib, and a plurality of rolling bearing members disposed in the groove and in contact with the sinker cover.
  • the flange serves as an anti-friction bearing resisting the relatively small axial stresses, while the rolling bearing members resist the high radial stresses.
  • the present invention relates to circular stocking machines, an object of the invention being to provide an improved guide for the sinker cover.
  • This guide system besides producing a rapid wear of surfaces coming into contact with each other, has the disadvantage that it is necessary to increase the mounting plays to the detriment of precision and accuracy of the entire assembly. This is particularly true in the latest multi-feed machines where, because of more sliding of the sinkers on the outer crown, at each revolution of the machine a considerable overheating of the crown occurs with consequent expansion.
  • a known system devised to minimize sliding friction consists in guiding the cover with three rollers arranged at 120 on the outer crown circular wall.
  • the axes of the rollers are integral with the cover itself, and the outer crown circular wall is of larger diameter than the cover.
  • the support points which are in fact two lines no more than 67 mm. long, are of too reduced dimensions to ensure that no crushing or deformation occurs on the portion of the outer crown on which the rollers rest.
  • the machine according to the present invention comprising in a well known manner a sinker cover sliding over an outer sinker crown, and substantially characterized in that the sinker crown is formed with a circumferential groove and receives rolling members interposed between the sinker crown and the sinker cover in the zone of radial contact therebetween.
  • the sinker crown includes at least two parts rigidly connected to each other to form the groove for the rolling members, said members projecting from the groove into contact with the sinker cover.
  • FIG. 1 illustrates an axial view, with parts in section, of a preferred embodiment
  • FIG. 2 is an enlarged fragmentary view of a variation.
  • the needle cylinder 1 is associated with the outer sinker crown 2 via locking plates 3 tightened by means of screws 4.
  • the sinker crown 2 houses the sinkers and has secured thereto a radiallyextending flange 5, for example, by means of screws 6.
  • Flange 5 defines, with a peripheral rib 11 on sinker crown 2, a circumferential groove for receiving rolling bearing members in the form of rollers 7.
  • Rollers 7 are rotatable on axes parallel to the axis of rotation of the sinker crown, the roller axes being freely movable along the groove containing the rollers, as in roller bearings of known types.
  • the sinker cover 8 On the crown 2 and the flange 5 is supported the sinker cover 8, which is held in position overlying the crown via the clamps 9 locked on the cover 8 by means of screws 10.
  • the clamps 9 are fixed to underlie the flange 5, so as to avoid any relative axial displacement between cover 8 and crown 2, while still permitting the latter to freely rotate together with its flange 5.
  • the main stress of friction against the cover 8 essentially occurs through the rollers 7 which provide support in radial direction.
  • the surface of rib 11 of the crown 2 is not in contact with the cover 8, but is of slightly smaller diameter than the inside diameter of said cover 8 so that the cover is radially spaced from the crown but is in contact with the flange 5.
  • the flange serves not only as a part of the means for housing the rolling bearing members, but also as an anti-friction bearing resisting the axial stresses, the latter being relatively small compared to the high radial stresses resisted by the rolling bearing members.
  • the crown 2 may be made of metal, such as steel, or of any other suitable material.
  • the flange 5 may also be of metal, but is preferably of plastic material, for example 11 lon.
  • the rolling members are in the form of balls 7 and may be spaced from each other by a containment guiding cage 12 having a separator 13.
  • Conventional ball bearings could also be used in which the balls 7' are mounted in cages of known type.
  • a needle cylinder secured thereto to rotate therewith, said sinker crown including a peripheral rib, a radially extending flange secured to said sinker crown and defining with said peripheral rib a circumferential groove around said sinker crown, a sinker cover overlying said sinker crown bearing members disposed in said groove 'in' contact with said sinker cover, whereby said flange serves with said peripheral rib for housing the rolling bearing members and also for resisting the axial stresses, while said rolling bearing members resist the high radial stresses.
  • a circular stocking machine wherein said sinker crown is made of steel and said flange is made of plastic.
  • a circular stocking machine according to claim 1, wherein said rolling bearing members consist of rollers having axes parallel to the sinker crown rotating axis.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Rolling Contact Bearings (AREA)
US478921A 1964-08-14 1965-08-11 Sinker cover mechanism for circular knitting machines Expired - Lifetime US3354673A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT5029564 1964-08-14

Publications (1)

Publication Number Publication Date
US3354673A true US3354673A (en) 1967-11-28

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ID=11272671

Family Applications (1)

Application Number Title Priority Date Filing Date
US478921A Expired - Lifetime US3354673A (en) 1964-08-14 1965-08-11 Sinker cover mechanism for circular knitting machines

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US (1) US3354673A (it)
IT (1) IT721769A (it)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1643156A (en) * 1925-02-27 1927-09-20 Robert E Farmer Ball race
US2879083A (en) * 1953-11-16 1959-03-24 Youngstown Sheet And Tube Co High pressure swivel connector for adjustable conduits with strain relief means
US3192741A (en) * 1960-08-19 1965-07-06 Schubert & Salzer Maschinen Circular knitting machine for the production of partially reinforced hose goods and method therefor
US3271835A (en) * 1964-02-27 1966-09-13 Hadley Company Inc Fabric tensioning device for shearing mechanisms
US3273359A (en) * 1963-01-11 1966-09-20 Banner Company Sinker cap mechanism for circular knitting machines

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1643156A (en) * 1925-02-27 1927-09-20 Robert E Farmer Ball race
US2879083A (en) * 1953-11-16 1959-03-24 Youngstown Sheet And Tube Co High pressure swivel connector for adjustable conduits with strain relief means
US3192741A (en) * 1960-08-19 1965-07-06 Schubert & Salzer Maschinen Circular knitting machine for the production of partially reinforced hose goods and method therefor
US3273359A (en) * 1963-01-11 1966-09-20 Banner Company Sinker cap mechanism for circular knitting machines
US3271835A (en) * 1964-02-27 1966-09-13 Hadley Company Inc Fabric tensioning device for shearing mechanisms

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Publication number Publication date
IT721769A (it)

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