US3800561A - Cam race construction for knitting machines, particularly circular knitting machines - Google Patents

Cam race construction for knitting machines, particularly circular knitting machines Download PDF

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Publication number
US3800561A
US3800561A US00261693A US3800561DA US3800561A US 3800561 A US3800561 A US 3800561A US 00261693 A US00261693 A US 00261693A US 3800561D A US3800561D A US 3800561DA US 3800561 A US3800561 A US 3800561A
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United States
Prior art keywords
cam race
cam
opening
block
insert plug
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Expired - Lifetime
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US00261693A
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English (en)
Inventor
H Beuter
A Planck
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.)
Fouquet Werk Frauz and Planck
FOUGUET WERK FRAUZ AND PLANCK
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Fouquet Werk Frauz and Planck
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Publication of US3800561A publication Critical patent/US3800561A/en
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    • 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
    • D04B15/32—Cam systems or assemblies for operating knitting instruments
    • D04B15/322—Cam systems or assemblies for operating knitting instruments in circular knitting machines with needle cylinder and dial

Definitions

  • the present invention relates to knitting machines, and more particularly to circular knitting machines and especially to the construction of the cam races which form the guide tracks for the needle butts, or other control butts of the knitting machine.
  • cams, and cam races of knitting machines usually are made as separate elements, individually placed and replaceable.
  • cams are cut into, or applied on blocks which are essentially segmental. These blocks may have cam parts placed thereon which are fixed, the cam parts defining the cam path and being secured to the cam block by means of screws or the like. Changing the cam parts is very time-consuming since the segmental cam block pieces have to be removed. Additionally, adjustment of such cam parts or inspection for wear is timeconsumingand difficult.
  • Cam blocks and cam elements are known in which the'cam parts themselves are adjustable, so that the needle positions can be adjusted by changing the position of the cam elements.
  • the needles can be selectively placed in pass, or idle, tuck, or knitting position.
  • the needle guide path, that is the cam path is so changed within the adjustment region of the adjustable element, however, that it is difficult to guide the needle accurately. It may happen that, when the adjustable cam element is set to, for example, tuck position, the centrifugal force of needles in the dial will still project the needle to the farthest possible position within the cam path which results in faults in the knit fabric.
  • Cams and cam tracks are known in which the needle guide path is a cut groove within a cam block. These cut grooves have to be accurately made, and adjustment of the needle path, of course, is impossible.
  • the dial seg ments can be removed, bodily, from the dial carrier, and the dial cam path can be exchanged, in groups (see German Patent No. 1,938,891).
  • the cam part dial or cylinder
  • these blocks will be segmental.
  • the blocks are formed with openings which extend from an outwardly accessible surface towards the cam race in the interior of the cam block.
  • Insert elements are provided which are shaped to fit into the openings to seat therein. The insert elements are insertable selectively, and have their inner surfaces shaped to provide a portion of the cam race.
  • insert elements can be provided which, selectively, have cam paths provided thereon to form pass or idle, tuck, knit, and transfer needle paths.
  • These cam races, at the interior of the insert, when inserted-in the openings, can be cut into the inner faces or provided by separate cam elements or cam portions to define a cam track within which the needle butts can run.
  • the inserts are located in predetermined positions in the cam race blocks and secured therein; in accordance with one embodiment of the invention, the cylinder inserts are snapped in place and held in position by spring-loaded pins, and can be removed by inserting a suitable tool into a keyhole slot.
  • FIG. I is an interior view of a segment of a cylinder cam for a circular knitting machine, also illustrating the needles and the needle paths, in schematic form;
  • FIG. 2 is an outside elevation of the cylinder of the invention
  • FIG. 3 is a longitudinal sectional view, partly schematic, along line AA of FIG. 2;
  • FIG. 4 is a top view of the cylinder of FIGS. 1 and 2;
  • FIG. 5 is a bottom view, looking up, ofa dial cam segment also, schematically, illustrating needle paths;
  • FIG. 6 is a horizontal cross-sectional view along line 8-8 of FIG. 5;
  • FIG. 7 is a fragmentary top view of the dial segment, with the inserts removed; and' FIG. 8 is a longitudinal cross-sectional view along line C-C of FIG. 7.
  • a cylinder cam block 1 provides the needle cam track or cam path for three knitting feeds, I, II, III.
  • the cam track can control both short and long cylinder needles.
  • Feed 1 is illustrated with a cam track path driving the needles to knitting position; feed II with a cam track path driving the needles to tuck position; and feed III to keep the needles in pass or idle, or non-knitting position.
  • the path or track of the needles, engaged by the needle butts is schematically indicated at 17.
  • the path of the needles themselves is defined by cam elements 7, 7, 7a, 7'a, 7b, 7b. Two such groups of cam elements are provided, longitudinally staggered, to permit insertion of long or shortneedles.
  • cam elements 7, 7' 7b are secured to the cam block segments by means of screws (not shown).
  • the special cam elements are not formed as separate parts secured to the cam. block but rather the cam block is extended and the paths for the butts of the needles are cut, by example, by milling, into the cam blocks themselves. End blocks 9, 9 are provided at the inside of the cam track blocks in order to provide for exact and accurate positioning of the cam race segments.
  • Various other needle control elements conventional in the art, may be provided on the blocks; they are not shown in the drawings for simplicity.
  • the blocks are formed with openings pierced therethrough, to be accessible from the outside.
  • circular cuts 3 are made through the cylinder block (FIGS. 1, 3) and into these cuts, inserts 5 are placed which carrythe cam elements 7, 7', 7a 7b, respectively.
  • the insert elements are readily removable from the cam blocks.
  • the inserts are formed with a keyhole l3, partly blocked to the outside, to permit insertion of a suitably shaped key which reaches behind the slotted front plate 13 to permit pulling out of the insert 5 against the spring tension of a spring-loaded pin 12', placed in position to fit a matching depression 12a formed at the circumference of the insert 5.
  • the pin 12 is held in a small sleeve 12 which is outwardly threaded so that the spring tension with which the pin 12' is pressed into recess or depression 12a can be adjusted.
  • the depression may be in form ofa groove, extending circumferentially around the circular insert 5.
  • a vertical bore 30 (FIG. 4) is formed in the cylinder, through which a circular pin can be inserted, matching a similar cut-out formed at the side of the insert 5, to additionally securely locate the insert in properly aligned vertical position. This permits easy removal of the inserts 5, by first removing the pins from opening 30 (FIG. 4) and then, by means of a key inserted through keyhole 13, twisting the element 5.
  • the depressions in this case, can be made to taper gradually outwardly so that the pin 12' rides against the spring pressure over an angle of inclination which is shallow with respect to the angle of inclination extending in axial direction, that is in the direction shown in FIG. 3, to positively locate the insert 5 in radial position.
  • the insert element 5 is tapered at its inner end to provide for ease ofinsertion.
  • the cam elements 7, 7' themselves are somewhat smaller than the interior diameter of the opening 3 within the cam block itself, additionally facilitating insertion of the insert 5.
  • Inclined surfaces are formed at the interior side of the limit blocks 9 secured to the cam race block 1, for example by screws (not shown) to additionally facilitate insertion.
  • the matching surfaces of the elements 9 and 7, or 7', respectively, are preferably accurately pre-finished.
  • Central or intermediate locating blocks 10 (FIGS. 1, 3) can be secured to the segmental block similar to the limiting blocks 9, forexample by screws not shown, and likewise are formed with inclined surfaces 11 to facilitate locating of the cam segment elements 7, 7' themselves.
  • the inclined surface 19 at the inner side of the insert 5 itself guides the insert during insertion into the opening and past the pins 12' from the locating elements 12.
  • the basic concept of the construction of the dial segments is similar to that of the cylinder segments.
  • the dial block 2 (FIGS. 58) is formed with essentially rectangular, partly segmental cut-outs 4. These cut-outs are not exactly rectangular but taper slightly towards the interior of the dial, to extend radially from the center of the machine.
  • the dial itself is formed with a seating shoulder 14, which is drilled and tapped with an opening 14a.
  • the inserts themselves are also generally rectangular matching, however, the radial taper of the openings 4.
  • Inserts 6 are formed with a projecting shoulder 15 (FIG.
  • the dial segment blocks may, additionally, be formed with tapped holes into which screws 16 can be inserted after removal from openings 14a, to lift out the 4 insert elements 6.
  • the insert elements 6 again have the cam elements 8, 8' 8'b secured thereon, for example by screws, the elements driving the needles to selected, desired projecting positions or retaining the needles in a pass or idle path.
  • Typical knitting machines are, for example, Type SMJ, SRJP, SMH, SMJI-l, and other interlock circular knitting machines, eight lock circular knitting machines, single knit machines and the like made by Fouquet- Maschinene Frauz & Planck described in detail in their Radioan effet (Operating Instructions") and Montageund Radioan effet” (Installation and Operating Instructions); MELLIAND TEXTIL- BERICHTE Heidelberg, Vol. 42, issue 12, l96l,
  • a cam race construction comprising at least one cam race block (1, 2) having an outer surface and an inner surface and forming part of the knitting machine, first cam track plates (9, 10) secured to the inner surface of the cam race block (1, 2) to form a portion of the cam race (l7, 18), the cam race block (1, 2) being formed with at least one opening (3, 4) therethrough extending between the outer surface toward the inner surface carrying the cam race;
  • insert plug elements (5, 6) shaped to fit into the opening and insertable therein, said insert plug elements having a length equal to the thickness of the cam race block, and having an inner surface matching with the inner surface of the cam race block (1, 2);
  • Cam race construction according to claim 1 furthercomprising a slotted keyway (13) formed in the insert plug element (5) open to the outer surface thereof, to permit removal of said insert plug element and withdrawal from the opening.
  • the insert plug element is polygonal of matching outline
  • cam race construction according to claim 7, wherein the cam race block is part of the dial structure of a circular knitting machine;

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
  • Prostheses (AREA)
US00261693A 1971-06-21 1972-06-12 Cam race construction for knitting machines, particularly circular knitting machines Expired - Lifetime US3800561A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712130585 DE2130585A1 (de) 1971-06-21 1971-06-21 Strickmaschinenschloss, insbesondere fuer rundstrick- und rundwirkmaschinen

Publications (1)

Publication Number Publication Date
US3800561A true US3800561A (en) 1974-04-02

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Family Applications (1)

Application Number Title Priority Date Filing Date
US00261693A Expired - Lifetime US3800561A (en) 1971-06-21 1972-06-12 Cam race construction for knitting machines, particularly circular knitting machines

Country Status (9)

Country Link
US (1) US3800561A (pt)
BE (1) BE785157A (pt)
BR (1) BR7204000D0 (pt)
CH (1) CH552698A (pt)
DE (1) DE2130585A1 (pt)
ES (1) ES403540A1 (pt)
FR (1) FR2143151B1 (pt)
GB (1) GB1385433A (pt)
IT (1) IT959296B (pt)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4037434A (en) * 1976-03-26 1977-07-26 The Singer Company Closed cam track for a circular knitting machine
US4068498A (en) * 1974-10-15 1978-01-17 Asa S.A. Interlocking cams
US4231234A (en) * 1975-10-03 1980-11-04 Sulzer Morat Gmbh Assembly plate for assembling cam parts of a knitting machine
US5138848A (en) * 1989-11-10 1992-08-18 Sipra-Patententwicklungs-Und Beteiligungsgesellschaft Mbh Non-rotatable removably mounted cam sections

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3733811A1 (de) * 1987-10-07 1989-04-20 Sulzer Morat Gmbh Grossrundstrickmaschine
GB2299346A (en) * 1995-03-28 1996-10-02 Monk Dubied Limited Multifeed circular knitting machine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2748580A (en) * 1954-04-06 1956-06-05 Rudolph E Zeruneith Cam setting mechanism
US2756574A (en) * 1952-02-15 1956-07-31 Mellor Bromley & Co Ltd Cam system of knitting machines
US3490252A (en) * 1967-11-15 1970-01-20 Mayer & Cie Maschinenfabrik Cam systems for circular knitting machines
US3520153A (en) * 1968-05-02 1970-07-14 Marx Strickmaschbau Karl Cam system,especially for multi-feed circular knitting machines
US3670526A (en) * 1969-07-31 1972-06-20 Mayer & Cie Fa Needle track locking means for knitting machines
US3709004A (en) * 1970-11-02 1973-01-09 Warner Swasey Co Cam box for knitting machine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2756574A (en) * 1952-02-15 1956-07-31 Mellor Bromley & Co Ltd Cam system of knitting machines
US2748580A (en) * 1954-04-06 1956-06-05 Rudolph E Zeruneith Cam setting mechanism
US3490252A (en) * 1967-11-15 1970-01-20 Mayer & Cie Maschinenfabrik Cam systems for circular knitting machines
US3520153A (en) * 1968-05-02 1970-07-14 Marx Strickmaschbau Karl Cam system,especially for multi-feed circular knitting machines
US3670526A (en) * 1969-07-31 1972-06-20 Mayer & Cie Fa Needle track locking means for knitting machines
US3709004A (en) * 1970-11-02 1973-01-09 Warner Swasey Co Cam box for knitting machine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4068498A (en) * 1974-10-15 1978-01-17 Asa S.A. Interlocking cams
US4231234A (en) * 1975-10-03 1980-11-04 Sulzer Morat Gmbh Assembly plate for assembling cam parts of a knitting machine
US4037434A (en) * 1976-03-26 1977-07-26 The Singer Company Closed cam track for a circular knitting machine
US5138848A (en) * 1989-11-10 1992-08-18 Sipra-Patententwicklungs-Und Beteiligungsgesellschaft Mbh Non-rotatable removably mounted cam sections

Also Published As

Publication number Publication date
CH552698A (de) 1974-08-15
ES403540A1 (es) 1975-05-01
DE2130585A1 (de) 1973-01-11
FR2143151B1 (pt) 1973-07-13
FR2143151A1 (pt) 1973-02-02
BR7204000D0 (pt) 1973-06-07
BE785157A (fr) 1972-10-16
GB1385433A (en) 1975-02-26
IT959296B (it) 1973-11-10

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