US3913356A - Needle-supporting mechanism for pile fabric-producing circular knitting machines - Google Patents

Needle-supporting mechanism for pile fabric-producing circular knitting machines Download PDF

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Publication number
US3913356A
US3913356A US285676A US28567672A US3913356A US 3913356 A US3913356 A US 3913356A US 285676 A US285676 A US 285676A US 28567672 A US28567672 A US 28567672A US 3913356 A US3913356 A US 3913356A
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US
United States
Prior art keywords
needle
sinkers
needles
needle cylinder
partitions
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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US285676A
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English (en)
Inventor
Hansjoachim Suppe
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.)
Rieter Ingolstadt Spinnereimaschinenbau AG
Original Assignee
Schubert und Salzer Maschinenfabrik AG
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Filing date
Publication date
Priority claimed from DE19712143954 external-priority patent/DE2143954C3/de
Application filed by Schubert und Salzer Maschinenfabrik AG filed Critical Schubert und Salzer Maschinenfabrik AG
Application granted granted Critical
Publication of US3913356A publication Critical patent/US3913356A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B9/00—Circular knitting machines with independently-movable needles
    • D04B9/12—Circular knitting machines with independently-movable needles with provision for incorporating pile threads
    • 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 needlesupporting ring adjacent to the sinkers may have deep notches forming guideways for swinging portions of the sinker levers.
  • Sinkers translated linearly by a pivotable lever engaging a sinker plate ear are separated by radial partitions carried by the needle cylinder.
  • Such partitions have upper edge slots adjacent to upper ends of the needle stems to receive a complementally slotted needle stem bearing ring.
  • the needlesupporting ring may be segmented.
  • the invention relates to a circular knitting machine for the production of fabric having pile material interlaced into the knitted mesh fabric base, this machine being equipped with needles which are individually movable between the guide plates of a needle cylinder and with pile loop sinkers which are movable between the needles substantially transversely of the direction of needle movement.
  • the pile loop sinkers are reciprocated by two cam elements which operate alternately.
  • One cam element guides a plurality of rocker members, one rocker member being provided for co-operation with each pileloop sinker.
  • the rocker members are capable of swinging about a stationary swivel axis, outside the circle or ring of needles. In the case of this prior proposal, it is, again, necessary to leave unobstructed the region in which the rocker members swivel.
  • the needles are subject to strong pulling forces in the radially outward direction exerted by the pile material as the pile loop sinkers are retracted. Since the individual needles yield by different amounts to this pulling force, pile loops of different size are formed, with the result that the completed knitted material has a nonuniform appearance.
  • a needle support directly in front of the upper portion of the needle stem adjacent to the sinker casting-off level.
  • This needle support prevents or restrains the needles from being radially outwardly bent at this point and substantially reduces the length of the needle which is .not positively guided.
  • the needle support may be rotatably mounted on a stationary part of the machine, and may compriseguideways or slots into which the levers are swung;
  • aneedle support of this kind in addition to supporting the needles, radially guides the pile loop sinker levers.
  • this needle support can be coupled to turn with the needle cylindenthrough the intermediary of the pile loop sinkers. Since different sinkers are in different positions between the extremes of retraction and extension at a given instant in time, a large number of sinker levers are always present in the guide slots. If rectilinearly movable pile loop sinkers are employed, then the needle support may advantageously be mounted in the guideway side plates. Conveniently, the needle support may consist of a plurality of segments, to facilitate accessibility to individual needles and guide plates.
  • each of at least two guide plates has, at its end lying closer to the casting-off or knocking-over plane, a nose which engages over the upper edge of the segment.
  • Each segment has slots in its opposite or lower edge margin corresponding to the locations of these two guide plates.
  • FIG. 1 is a radial section through a portion of a circular knitting machine in accordance with the invention, parts being broken away;
  • FIG. 2 is a radial section through a portion of a circular knitting machine in accordance with a modified form of the invention, with parts broken away;
  • FIG. 3 is a developed view of a detail of the circular knitting machine illustrated in FIG. 2;
  • FIG. 4 is a radial section through a prior art machine showing the problem overcome by the present invention
  • FIG. 5 is a radial section similar to FIG. 1, but taken along a different portion of the sinker cams showing the sinker in a different operative position;
  • FIG. 6 is a radial section similar to FIG. 2 but on an enlarged scale showing an auxiliary ring-retaining latch
  • the invention can be used in different circular knit- "ting machines for the production of fabric with pile material interlaced into a knitted mesh fabric whether the pile material is formed into loops by sinkers swingable on the ends of pivoted levers or by pile loop sinkers movable rectilinearly by engagement with swinging levers. In both cases the region outside the needle ring must be left free to provide clearance for lever swinging.
  • FIG. 1 illustrates a first embodiment of the invention.
  • Grooves 10 in the lower part of a needle cylinder 1 complementally receive partitions or guide plates 11 which form guideways for the lower portions of cylinder needles 20 and lever-mounted sinkers 2.
  • the cylinder needles 26 are reciprocated in a known manner by engagement of @am elements 30 and 31 with butts 21 of the cylinder needles 20.
  • the cam elements 30 and 31 are carried in a conventional manner by a stationary cam carrier 3.
  • Each pile loop sinker 2 is pivotable about a pivot 22 carried in an annular groove 12 of the needle cylinder 1. Swinging of the pile loop sinkers 2 between the cylinder needles is controlled by means of cam elements 32 and 33 which are attached to the cam carrier 3 and engage complemental portions of the sinker lever.
  • a guide member 34 is located between the cam elements 32 and 33 and is positioned opposite the pivot 22.
  • This guide member 34 serves to guide the swinging movements of the pile loop sinkers by sliding engagement with the accurate lever edge 23, the arc of which is concentric with pivot 22.
  • an upper portion of the outer edge 24 of the needle stem lies in a plane tangential to the portion of edge 23 engaged by tongue 34, so that the cylinder needle 20 also is supported by the guide member 34, with the result that this needle 20 is not shifted by the pulling force exerted by the pile yarn in the direction of the arrow P.
  • tongue 34 is located a substantial distance above cam ring and, therefore effectively and substantially shortens the portion of the needle length which is subject to bending.
  • the cylinder needles 20 are not supported in the region between the casting-off plane A and the guide member 34. Consequently, a pulling force exerted in the direction of the arrow P during sinking of pile loops S may cause the cylinder needle 20 to yield or bend, as shown in FIG. 4, particularly if the pile material I-[ is in the form of a pile thread, resulting in a non-uniform pile height and, thus, a non-homogeneous knitted fabric.
  • a needle support 4 located as near as possible to the casting-off plane A is provided on the side of the cylinder needles 20 remote from the needle cylinder 1.
  • This needle support 4 in the form of an annular ring of T cross section is retained against axial displacement between a shoulder 35 of carrier 3 and a retaining ring 36 attached to the cam carrier 3.
  • the needle engaging tongue of support 4 is equipped with radial guide slots 40, in which the pile loop sinkers 2 are guided during swinging.
  • the tongue end portions between the guide slots 40 extend as far as the upper end 24 of the needle stem, so that they are in a position to prevent the cylinder needles 20 from yielding to the pulling force exerted in the direction of the arrow P.
  • the pile loop sinkers 2 in the guide slots 40 simultaneously carry the needle support 4 with them, so that the needle support 4 rotates synchronously with the needle cylinder 1 relative to the carrier 3, its bearing shoulder 35 and bearing-retaining ring 36.
  • an upper portion of the lever of sinker 2 is aligned in a direction perpendicular to the cylinder radius with a wall of the groove 40 of needle support ring 4, so that rotation of the sinker with needle cylinder 1 will cause it to bear against wall 40 and thereby rotate ring 4.
  • some sinkers are in the position shown in FIG. 1, other sinkers will be in the position of FIG.
  • the needle support 4 could be rotatably mounted instead of on the cam carrier 3 on another stationary machine part.
  • the friction between the needle support 4' and its mounting could be reduced through the use of a roller-bearing ring, instead of having plain bearing engagement with carrier 3 ball bearings or, shoulder 35 and retaining ring 36.
  • a separate drive such as a chain and sprocket drive, for the needle support 4 to drive it synchronously with the needle cylinder 1.
  • FIG. 2 shows another embodiment of the invention, in which pile loop sinkers 5 are reciprocated rectilinearly by two cam elements 50 and 51.
  • the cam element 50 directly engages butts 52 of the pile loop sinkers 5 to effect sinker extension.
  • Cam element 51 acts on one arm of lever 54 to swing the other lever arm engageable with butts 53 of the pile loop sinkers 5 to effect sinker retraction. Details of this sinker extension and retraction mechanism are disclosed in US. Pat. No. 3,837,184.
  • Element 34 is a guide engageable with the arcuate edge of lever 54 to maintain the lever against pivot 22 for smooth controlled swinging of the lever. Unlike guide 34 in FIG. 1, the guide of FIG. 2 does not serve a needle-supporting function.
  • the pile loop sinkers 5 are mounted in a sinker bed 55 and are guided by radial grooves formed in the needle cylinder 1.
  • the sinker bed 55 is mounted on the partitions or guide plates 13 of the needle cylinder 1, and rotation is imparted to this sinker bed 55 by these guide plates 13 in the course of rotation of the latter.
  • the guide plates 13 also carry the pivot 22 on which the rocker members or levers 54 are pivotally mounted. Partitions 13 form guideways for needles 20 and for sinker-retraction levers.
  • the needle support ring 6 is mounted in the upper portions of guide plates 13 at a location such that the needle support ring engages needles 20 closely adjacent to the loop cast-off level A. In this way it is possible to ensure that the needles 20 cannot yield to the pulling force exerted, in the direction of arrow P, by the pile loop sinkers 5 while the latter are forming the required loops in the pile material.
  • Each of the guide plates 13 has a portion above and radially inward relative to pivot 22.
  • Such partition portion has an elongated upper portion closely adjacent to the needle cylinder 1 and extending generally axially alongside the upper end margin of the needle cylinder.
  • the elongated portion projects radially outwardly from the needle cylinderand is joined to a partition portion which projects radially outward relative to the needle cylinder farther than the elongated portion to form a ledge 14.
  • the axially elongated upper portion and ledge 14 thus suggest a stepped configuration. It is preferred that the lower portion of the partition which forms ledge 14 extend upwardly from the ledge so that ledge 14 forms the bottom of a slot, which slot extends parallel to the said upper stem portion 24.
  • the lower margin of the needle supporting ring 6 is received in slots of the partitions and the rings axially lower edge rests on the ledge 14. The guide.
  • the plate may include a resilient hook 65 or latch between the needle support 6 and the casting-off plane A to retain the needle support 6 in its correct position against rotational or axial displacement, as shown in FIG. 6, for example.
  • the needle support ring 6, instead of being continuous, may consist of mutually overlapping segments 60 and 61, shown in FIG. 3.
  • FIGS. 3 and 7 illustrate a particularly favourable embodiment of the needle support ring 6, in which the ring includes one or more pairs of segments 60 and 61.
  • the ends of segment 60 are inclined downwardly and inwardly whereas the ends of segment 61 are inclined downwardly and outwardly complementary to the ends of segment 60.
  • Each segment 60 and 61 has, at a distance of a number of needle divisions, two deep notches 62 which are positioned on the side of the segments remote from the casting-off plane A. Each of these notches is located in the vicinity of an associated guide plate 13, and extends parallel to the latter.
  • Each of those guide plates 13 in front of which a notch 62 is located in segment 60 or 61 of the needle support 6 has a nose which engages over the upper edge of the needle support 6 directly above the corresponding notch 62.
  • Segments 60 and 61 are retained in their correct radial position by slots 14 formed in guide plates 13 in which the lower edge margin of the composite ring 6 are received. The axial position of segments 60 and 61 is maintained because their lower edges rest on the bases of the slots 14 and noses 15 on the upper portion of the stepped guide plates 13 project over and engage the upper edges of segments 60 and 61.
  • guide plates or partitions 13 having noses 15 are first inserted into position. Segments 61 are then introduced obliquely downwardly into slots 14 of the guide plates 13. The obliquity with which segments 61 are thus inserted into the slots 14 is possible owing to the provision of notches 62 in segments 61. Segments 60 are then thrust into position in a similar manner.
  • the other guide plates 13, which are without noses 15, can now be placed in position, and segments 60 and 61 are secured in their final position by means of the bottoms and sides of slots 14 of these guide plates 13 and noses 15 on the guide plates 13 first inserted.
  • a segment 60 or 61 should have to be dismantled, then this is accomplished by carrying out the abovedescribed steps in the reverse sequence. After removal of the few guide plates 13 which are without a nose 15 in the vicinity of the corresponding segment 60 or 61, this segment can be tilted and obliquely upwardly withdrawn. Guide plates 13 having noses 15 can then be taken out.
  • notches 63 may be provided in the upper margins of the segments directly above the notches 62.
  • Notches 62 are significantly wider than guide plates 13. to facilitate exchanging the segments.
  • the width and length of notches 63 correspond to the width and length of the noses 15 and such noses are snugly embraced by the slots to prevent circumferential displacement of the segments.
  • This form of construction for preventing circumferential displacement is particularly advantageous if the segment ends extend of parallel to guide plates 13 instead of being inclined. Any spreading of segments 60 and 61 having upright ends would provide an opening in which a needle stem might lodge.
  • Such upright ends 64 of these segments are shown in dashed line in FIG. 3.
  • segments 60 and 61 could be formed to have a comb-like appearance in plan view, the teeth forming radial slots therebetween. Such slots would form guideways for the levers 54 so that the plates 13 would only connect the sinker bed 55 to the needle cylinder 1.
  • a circular knitting machine for producing pile material interlaced into a mesh base including a needle cylinder, individually movable needles having needle stems, and linearly reciprocable sinkers projectible toward the needle cylinder between such needles substantially transversely of the needle lengths and retractable away from the needle cylinder for drawing pile loops and thereby exerting tension on the needles in a direction away from the needle cylinder, driving means for driving the needles and sinkers, the sinkers and needles being synchronously rotatable relative to the driving means, the improvement comprising a segmentedneedle-supporting ring engageable with the sides of the needle stems opposite the needle cylinder at locations closely adjacent to the sinkers.
  • a circular knitting machine for producing pile material interlaced into a mesh base including a needle cylinder, individually movable needles having needle stems, a sinker bed plate, a plurality of radial partitions connecting the needle cylinder and the sinker bed plate, and linearly reciprocable sinkers projectible toward the needle cylinder between such needles substantially transversely of the needle lengths and retractable away from the needle cylinder for drawing pile loops and thereby exerting tension on the needles in a direction away from the needle cylinder, driving means for driving the needles and sinkers, the sinkers and needles being synchronously rotatable relative to the driving means, the improvement comprising a needlesupporting ring engageable with the sides of the needle stems opposite the needle cylinder at locations closely adjacent to the sinkers and carried by the partitions, said ring having an axial edge adjacent to the sinkers and an opposite axial edge remote from the sinkers, the partitions being stepped thereby forming an upper portion projecting radially outwardly from the needle cylinder and a lower
  • the needle-supporting ring formed by a plurality of individual segments, each of said segments having notches in the axial edge adjacent to the sinkers, said edge engageable by the partition noses, which notches snugly embrace such noses.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
US285676A 1971-09-02 1972-09-01 Needle-supporting mechanism for pile fabric-producing circular knitting machines Expired - Lifetime US3913356A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712143954 DE2143954C3 (de) 1971-09-02 Rundstrickmaschine zur Herstellung von Maschenware mit in das Grundgestrick eingebundenen Florfaden oder dergleichen

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US3913356A true US3913356A (en) 1975-10-21

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US285676A Expired - Lifetime US3913356A (en) 1971-09-02 1972-09-01 Needle-supporting mechanism for pile fabric-producing circular knitting machines

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US (1) US3913356A (it)
CH (1) CH543623A (it)
CS (1) CS155998B2 (it)
DD (1) DD98120A5 (it)
ES (1) ES406295A1 (it)
FR (1) FR2152035A5 (it)
GB (1) GB1359261A (it)
IT (1) IT964337B (it)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4571957A (en) * 1983-05-05 1986-02-25 Terrot Strickmaschinen Gmbh Device for compensating for differences in thermal expansion in circular knitting machines
US4574596A (en) * 1983-06-14 1986-03-11 Terrot Strickmaschinen Gmbh Stitch-forming machine
US4584851A (en) * 1983-03-29 1986-04-29 Sipra Patententwicklungs-Und Beteiligungsgesellschaft Knitting machine for producing mesh products
US20090314038A1 (en) * 2006-07-07 2009-12-24 Santoni S.P.A. Knitting Machine With Latch Needles And Without Sinkers
US20160348287A1 (en) * 2014-02-24 2016-12-01 Santoni S.P.A. Circular knitting machine

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3320043A1 (de) * 1983-06-03 1984-12-06 Terrot Strickmaschinen GmbH, 7000 Stuttgart Maschenbildende maschine
DE3330530C1 (de) * 1983-08-24 1985-03-28 Memminger Gmbh, 7290 Freudenstadt Strickmaschine mit wenigstens einem Nadeltraeger

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1838739A (en) * 1928-12-13 1931-12-29 Charles H Breaithwaite Machine for knitting pile fabrics
US3010300A (en) * 1959-01-19 1961-11-28 Wildman Jacquard Co Element support means for knitting machines
US3643472A (en) * 1968-08-13 1972-02-22 Harry Apprich Apparatus for producing a looped fabric
US3754416A (en) * 1969-12-30 1973-08-28 H Apprich Apparatus for the production of knit goods

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1838739A (en) * 1928-12-13 1931-12-29 Charles H Breaithwaite Machine for knitting pile fabrics
US3010300A (en) * 1959-01-19 1961-11-28 Wildman Jacquard Co Element support means for knitting machines
US3643472A (en) * 1968-08-13 1972-02-22 Harry Apprich Apparatus for producing a looped fabric
US3754416A (en) * 1969-12-30 1973-08-28 H Apprich Apparatus for the production of knit goods

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4584851A (en) * 1983-03-29 1986-04-29 Sipra Patententwicklungs-Und Beteiligungsgesellschaft Knitting machine for producing mesh products
US4571957A (en) * 1983-05-05 1986-02-25 Terrot Strickmaschinen Gmbh Device for compensating for differences in thermal expansion in circular knitting machines
US4574596A (en) * 1983-06-14 1986-03-11 Terrot Strickmaschinen Gmbh Stitch-forming machine
US20090314038A1 (en) * 2006-07-07 2009-12-24 Santoni S.P.A. Knitting Machine With Latch Needles And Without Sinkers
US7895862B2 (en) * 2006-07-07 2011-03-01 Santoni S.P.A. Knitting machine with latch needles and without sinkers
US20160348287A1 (en) * 2014-02-24 2016-12-01 Santoni S.P.A. Circular knitting machine
US10287715B2 (en) * 2014-02-24 2019-05-14 Santoni S.P.A. Circular knitting machine

Also Published As

Publication number Publication date
IT964337B (it) 1974-01-21
GB1359261A (en) 1974-07-10
CH543623A (de) 1973-10-31
FR2152035A5 (it) 1973-04-20
DD98120A5 (it) 1973-06-05
DE2143954A1 (de) 1973-03-22
DE2143954B2 (de) 1975-09-18
CS155998B2 (it) 1974-06-24
ES406295A1 (es) 1975-09-16

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