WO1983000053A1 - Appareil modulaire boucleur pour machine de tufting a densite elevee - Google Patents

Appareil modulaire boucleur pour machine de tufting a densite elevee Download PDF

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Publication number
WO1983000053A1
WO1983000053A1 PCT/US1982/000838 US8200838W WO8300053A1 WO 1983000053 A1 WO1983000053 A1 WO 1983000053A1 US 8200838 W US8200838 W US 8200838W WO 8300053 A1 WO8300053 A1 WO 8300053A1
Authority
WO
WIPO (PCT)
Prior art keywords
hook
bar
looper
hook bar
slots
Prior art date
Application number
PCT/US1982/000838
Other languages
English (en)
Inventor
Corporation Tuftco
Max M. Beasley
Original Assignee
Tuftco Corp
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 Tuftco Corp filed Critical Tuftco Corp
Priority to AU87379/82A priority Critical patent/AU8737982A/en
Publication of WO1983000053A1 publication Critical patent/WO1983000053A1/fr

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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05C—EMBROIDERING; TUFTING
    • D05C15/00—Making pile fabrics or articles having similar surface features by inserting loops into a base material
    • D05C15/04—Tufting
    • D05C15/08—Tufting machines
    • D05C15/16—Arrangements or devices for manipulating threads
    • D05C15/22—Loop-catching arrangements, e.g. loopers; Driving mechanisms therefor

Definitions

  • This invention relates to a multiple-needle tufting machine, and more particularly to a modular looper apparatus for a multiple-needle tufting machine.
  • a conventional cut-pile hook bar has uniformly spaced slots in its front face for receiving the hooks which cooperate with the needles to form loops in the yarns carried by the needles.
  • the slots in the front face of the hook bar must be formed close together.
  • the closeness of the spacing of the looper slots is limited by the thinness of the walls between the slots.
  • Conventional loopers or hooks are held in their respective slots by individual set screws which are threaded into each slot and engage the opposed walls or lands of the slots.
  • the thin ⁇ ness of the walls is further limited by the diameters of the set screws.
  • the threaded movement of the set screws tends to expand and warp the slot walls or lands.
  • hook bar or looper apparatus for mounting a plurality. of looper hooks close to ⁇ gether in order to provide a more narrow gauge for cultiple-needle tufting machine, is disclosed in U.S. Pat. No. 4,217,837 of Max ⁇ i. Beasley, et al, issued August 19, 1980, for "FINE GAUGE LOOPER APPARATU FOR IN-LINE TUFTING MACHINE.”
  • the hook slots are formed in an insert bar received in the front face of the hook bar, and the looper hooks are held in position by a plurality of clamp ⁇ embers threadedly secured to the hook block and against the front body portions of the looper hooks.
  • the hook bars are made in the form of elongated nodules which are mounted end-to-end and each of the clamp members is adapted to secure a limited number of hooks upon the hook bar nodule.
  • the looper apparatus made in accordance with th invention is adapted for utilization in staggered needle cut pile tufting machines or in-line (single needle row) tufting machines having coarse gauges or narrow gauges in the order of 1/lOth of an inch or greater. More specifically, the looper apparatus made in accordance with this invention includes a plurality of elongated hook bars made of solid material, speci ⁇ fically steel, in which elongated, transversely spaced, shallow hook slots are formed in the top portion of the hook bar and the slots are open upwardl and forwardly in the hook bar.
  • Special looper hooks have body portions with rearward projecting shank portions, each shank portion being adapted to be snugly seated within its corresponding hook slot in the hook bar, in operative position, with the throats and bills of the hooks projecting forward from the front face of the hook bar.
  • a transverse top wall formed in the front portion of the hook bar projects above the remaining top portion of the hook bar behind the top wall to provide an elongated transverse groove or depressed area for receiving a cap plate on top of the hook bar to hold the shank portions securely within their respective slots.
  • a plurality of set screws project, preferably at an angle, rearwar
  • a plurality of the modular hook bars with their hooks and cap plates are firmly seated in a front- facing transverse recess in an elongated back-up bar.
  • the rear edge of the cap plate of each modular hook bar also projects into the recess in the back-up bar snugly above the hook bar where the hook bar and the cap plate are firmly held against movement.
  • the set screws are threaded through solid portions of the hook bar beneath these slots until the free ends of the set screws penetrate the slots for firm engagement with the bottom edges of the respective shank portions of the looper hooks.
  • the modular hook bars are securely held in the transverse face recess of the back-up bar by trans ⁇ versely spaced threaded bolts, rather than by welding.
  • the body in a preferred form of the invention, the body
  • each looper hook has a rearwardly facing, vertical rear shoulder for snug engagement against the front edge portion of the transverse cap plate for further stabilized support of the looper hooks.
  • each looper hook has a throat which intersects the bottom cutting edge of its correspond ⁇ ing bill through a smooth merging arcuate portion which forms a transition area cooperating with each corresponding vertically reciprocal knife in a cut pile tufting machine.
  • individual looper hooks as well as independent modula hook bars, may be inserted, removed, or replaced, in the looper apparatus.
  • FIG. 1 is a fragmentary, sectional elevation taken along the line 1-1 of FIG. 2 longitudinally through a portion of a narrow-gauge, staggered-needle
  • FIG. 2 is a fragmentary, front elevation of the looper apparatus, taken along the line 2-2 of FIG. 1;
  • FIG. 3 is a fragmentary, top plan view of the looper apparatus taken along the line 3-3 of FIG. 1, with portions broken away;
  • FIG. 4 is a fragmentary section taken along the line 4-4 of FIG. 2;
  • FIG. 5 is a fragmentary section taken along the line 5-5 of FIG. 2, with the looper hooks removed. Best Mode For Carrying Out The Invention
  • FIG. 1 discloses a transverse needle bar 10 in a conventional multiple-needle tufting machine support ⁇ ing a first row of uniformly spaced front needles 11 and a second row of unifu_- ⁇ iy -Spaced rear needles 12 offset preferably mid-way between the front needles 11, to provide a uniform, narrow gauge, staggered needle tufting machine.
  • the needle bar 10 is verticall reciprocated by conventional ceans, not shown, to cause the front and rear needles 11 and 12 to move between an upper position above the base fabric 13 to a lower position penetrating the base fabric 13 so that the needles will carry yarns, such as yarns 14 and 15, through the base fabric 13 to form loops of tufting therein.
  • the base fabric 13 is supported upon a needle plate 16 for movement, by means not shown, in the direction of the arrow of FIG. 1, that is longitudinally from front-to-rear through the machine.
  • the looper apparatus IS which cooperates with the needles 11 and 12 includes a transverse hook bar 20 of unique construction fixed upon a back-up bar 21, which in turn is supported upon a plurality of rocker arms 22 journaled on a rock shaft, not shown, and driven by conventional ceans connected to the rocker arms 22 for limited reciprocal movenent in x ⁇ _ K
  • the hook bar 20 has an upper portion and a lower portion and a front face which includes an upper front face portion 25, an intermediate angular front face portion 26 and a lower front face portion 27.
  • the hook bar 20 also includes a bottom surface 28 and a rear vertical transverse surface 29.
  • the upper portion of the hook bar 20 includes a top surface 30 and front wall portion 31 projecting upward above the main top surface 30 behind the front wall 31.
  • the front wall 31 also includes a rearward projecting flange or lip 32.
  • the hook slots 35 are of relatively shallow depth, preferably occupying less than the upper half of the solid hook bar 20, but extending the full length (front-to-rear dimension of the hook bar 20.
  • Each looper hook 36 has a body portion including a substantially elongated, relatively straight, rearward projecting shank or shank portion 38 adapted to fit within the major portion of the corresponding slot 35.
  • the neck or head 40 of the looper hook 36 forming a part of the body portion defines a rear vertical surface or shoulder 39 tthich intersects the shank portion 38.
  • Projecting forward from the neck or head 40 of the looper hook 36 is an elongated bill 41 having a barbed free end portion 42 and defining a bottom cutting edge 43 intersecting the throat 44 through an arcuate or circular curved merging portion 45 of substantial radius, for example, approximately 5/32 inch.
  • the rear face 29 of the hook bar 20 is adapted to snugly seat within a transverse recess 47, formed in the front face of the back-up bar 21.
  • the upper edge of the transverse recess 47 terminates in a forward projecting lip or flange 48.
  • the lip 48 projects in opposition to the rear ⁇ ward projecting lip 32 on the front wall 31 to define a recess above the top face 30 and between the back-up bar 21 and the front wall 31, to snugly receive an elongated transverse cap plate 50.
  • the cross section of the cap. plate 50 is roughly an inverted T-shape so that the cap plate 50 has upper transverse recesses along its front and rear edges to define a front lower tongue 51 and a rear lower tongue 52.
  • the cap plate 50 When the looper hooks 36 and 36' are positioned in their respective hook slots 35, and the cap plate 50 is seated in its groove with its front tongue 41 extend ⁇ ing beneath the rear lip 32 and the rear tongue 52 extending beneath the f ⁇ rwardly projecting lip 48, the cap plate 50 engages the top surfaces of the shank portions 38 to assist in securing the looper hooks 36 and 36' within their respective slots 35.
  • the height of the face recess 47 is preferably equal to the conbined heights of the rear face 29 and the rear lip 52 of the cap plate 50.
  • the hook bar 20 is held securely against the back-up bar 21 by a plurality of transversely spaced bolts 54.
  • the looper hooks 36 and 36' are firmly secured within the hook bar 20, with the rear shoulders 39 tightly seated against the front tongue 51 of the cap plate 50 by means of a plurality of set screws 55 and 56.
  • the set screws 55 and 56 are threaded through the angular front face portion 26 and through the solid portion of the hook bar 20 until the set screws engage the bottom edges of the respective shank portions 38, to securely hold the • looper hooks 36 and 36' within the hook bar 20.
  • the looper hooks 36 cooperating with the rear needles 12 are identical in construction to the looper hooks 36' which cooperate with the front needles 11, except that the bills 41' of the looper hooks 36* are longer than the bills 41 by a length substantially equal to the offset longitudinal spacing between the rows of front needles 11 and rear needles 12.
  • the throats 44 of all of the loopers 36 and 36' are in transverse alignment, pursua to the teaching in the U.S. Card patent No. 4,003,321 for "CUT PILE APPARATUS FOR STAGGERED NEEDLE TUFTING MACHINE."
  • 36' is a conventional cut pile knife 58 which is adapt to be reciprocated in a conventional manner in synchronism with the reciprocation of the hook bar 20 for cooperation with the respective needles 11 and 12 to catch and cut the yarns 14 and 15 in order to form cut pile loops, not shown.
  • the back-up bar 21 may be made in several long sections for abutting end-to-end, or the back-bar 21 may extend the full width of the machine.
  • the modular hook bars 20 are also made in sections abut ⁇ ting end-to-end, and are usually the same length as a corresponding back—up bar section 21.
  • each hook or hook blade 65 and 66 is identical to the looper hooks 36 and 36 ⁇ , re ⁇ spectively, but are permanently joined together by a transverse spacer bar 67.
  • This spacer bar 67 is adapted to be seated within an arcuate recess 68 formed in a land at one end of the modular hook bar 20 as disclosed in the drawings.
  • other means of continuing the uniform gauge of the hooks 36 from one hook bar section to the next may be employed.
  • each set screw 55 may be in vertical planar alignment with an individual looper hook 36 while each set screw 56 may be set in vertical planar alignment with a hook 36'.
  • each set screw 55 and 56 extends through a threaded portion of solid material sub ⁇ stantially through its entire length, until the free end of each set screw penetrates the respective hook slot 35 for engagement with the bottom edge of the shank portion 38 of a corresponding looper hook 36 and 36'.
  • the solid cap plate 50 having its front and rear tongues 51 and 52 retained under the respective lips 32 and 48 of the hook bar 20 and the back-up bar 21, respectively, locks and holds the top edges of the shank portions 38 of the hooks 36 and 36' in secure and rigid position for operating under normally severe stresses exerted upon a looper apparatus in a tufting machine.
  • OMPI hooks between the cutting edge of the bill 43 and the throat 44 provides a gradual transition portion for the movement of the knife 58 in cooperation with the cutting edge 43 of the bill 41 for severing the yarns 14 and 15.
  • the looper apparatus 18 made in accordance with this invention enhances the accuracy of the gauge of the looper hooks 36 and 36', minimizes distortions in the hook bar 20, and also minimizes or eliminates any warping or tendency toward expansion by the lands or walls 62 of the respective hook slots 35.
  • Both the height and depth of the solid portions of the hook bar provide effective resistance. to cantilever forces not only downward in a clockwise direction in a vertical plane, but also in transverse planes by the knives against the looper hooks, and other twisting and sagging forces caused simply by the mere weight and extensive spans of the hook bar 20 and the back-up bar 21.
  • the upward projecting front wall 31 provides additional height to the side walls 62 of the respective slots 35 to afford additional reinforcement against the sides of the body portions of the hooks
  • the solid cap plate 50 provides a substantial back stop for engaging the rear shoulders

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)

Abstract

Un appareil modulaire boucleur (18) pour une machine de tufting à aiguilles multiples, à densité ou compte élevé, comprend des barres de crochets modulaires (20) fabriquées avec un matériau solide et ayant des fentes de crochet (35) formées dans la partie supérieure de chaque barre de crochet (20). Les crochets boucleurs (36, 36') sont retenus dans les fentes de crochet (35) par une plaque de couverture allongée (50) fixée transversalement le long des parties supérieures des barres de crochet (20), lesquelles sont assises fermement dans un évidement allongé transversal (47) aménagé dans une barre transversale d'appui (21) sur laquelle la barre de crochet (20) est fixée par des boulons filetés (54). Des vis (55, 56) sont vissées et s'étendent au travers des parties solides frontales de chaque barre de crochet (20) pour engager les crochets boucleurs individuels (36, 36'). Les crochets boucleurs individuels (36, 36'), ainsi que chaque barre de crochet modulaire (20), sont conçus pour en faciliter et accélérer l'extraction, l'introduction et le changement. La stabilité et la rigidité de l'appareil boucleur solide (18) se traduit par une plus grande résistance aux pressions exercées par les couteaux (58) agissant contre les côtés des crochets boucleurs (36, 36') dans une machine de tufting à poils coupés.
PCT/US1982/000838 1981-06-24 1982-06-21 Appareil modulaire boucleur pour machine de tufting a densite elevee WO1983000053A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU87379/82A AU8737982A (en) 1981-06-24 1982-06-21 Modular looper apparatus for narrow gauge tufting machine

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US27688581A 1981-06-24 1981-06-24
US276,885810624 1981-06-24

Publications (1)

Publication Number Publication Date
WO1983000053A1 true WO1983000053A1 (fr) 1983-01-06

Family

ID=23058484

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1982/000838 WO1983000053A1 (fr) 1981-06-24 1982-06-21 Appareil modulaire boucleur pour machine de tufting a densite elevee

Country Status (2)

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EP (1) EP0082193A1 (fr)
WO (1) WO1983000053A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3690620T1 (fr) * 1985-12-10 1989-01-19

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4018171A (en) * 1976-09-29 1977-04-19 The Singer Company Yarn tensioning means for tufting machines
US4155318A (en) * 1977-06-02 1979-05-22 Yoshio Yamamoto Looper for tufting machines
US4158339A (en) * 1978-06-22 1979-06-19 Tuftco Corporation Narrow gauge cut pile looper apparatus
DE2827008A1 (de) * 1978-06-20 1980-01-10 Carl Schlemper Gmbh & Co Kg Schlaufengreifereinsatz fuer tufting- maschinen
US4193359A (en) * 1978-06-23 1980-03-18 Tuftco Corporation Low pile forming apparatus for tufting machine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4018171A (en) * 1976-09-29 1977-04-19 The Singer Company Yarn tensioning means for tufting machines
US4155318A (en) * 1977-06-02 1979-05-22 Yoshio Yamamoto Looper for tufting machines
DE2827008A1 (de) * 1978-06-20 1980-01-10 Carl Schlemper Gmbh & Co Kg Schlaufengreifereinsatz fuer tufting- maschinen
US4158339A (en) * 1978-06-22 1979-06-19 Tuftco Corporation Narrow gauge cut pile looper apparatus
US4193359A (en) * 1978-06-23 1980-03-18 Tuftco Corporation Low pile forming apparatus for tufting machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3690620T1 (fr) * 1985-12-10 1989-01-19

Also Published As

Publication number Publication date
EP0082193A1 (fr) 1983-06-29

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