EP0278561B1 - Broche d'un métier à filer ou à retordre - Google Patents

Broche d'un métier à filer ou à retordre Download PDF

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Publication number
EP0278561B1
EP0278561B1 EP88200177A EP88200177A EP0278561B1 EP 0278561 B1 EP0278561 B1 EP 0278561B1 EP 88200177 A EP88200177 A EP 88200177A EP 88200177 A EP88200177 A EP 88200177A EP 0278561 B1 EP0278561 B1 EP 0278561B1
Authority
EP
European Patent Office
Prior art keywords
thread
notches
frames
blade
spindle
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
Application number
EP88200177A
Other languages
German (de)
English (en)
Other versions
EP0278561A1 (fr
Inventor
Giancarlo Esposito
Vittorio Vernocchi
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.)
Savio SpA
Savio Macchine Tessili SpA
Original Assignee
Savio SpA
Savio Macchine Tessili SpA
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 Savio SpA, Savio Macchine Tessili SpA filed Critical Savio SpA
Publication of EP0278561A1 publication Critical patent/EP0278561A1/fr
Application granted granted Critical
Publication of EP0278561B1 publication Critical patent/EP0278561B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
    • D01H1/14—Details
    • D01H1/38—Arrangements for winding reserve lengths of yarn on take-up packages or spindles, e.g. transfer tails

Definitions

  • the present invention relates to an improved spindle for automatic spinning frames and twisting frames, which makes it possible the operations of automatic doffing of the full pirns, and of their replacing with empty tubes, to be improved.
  • An apparatus for cutting the tail yarn in spinning frame is known from JP-A-58 87327.
  • the spinning ring frame carries out, first of all, an accelerated advancement, winding on each full pirn a set of extended spirals, and then moves to a lower position, leading the thread to wind on the lower portion of the spindle, which is constituted by a ring nut which supports the tube, wherein said ring nut remains fastened to the machine. Therefore, the thread remains wound both on the filled tube, which constitutes the pirn to be removed, with a substantially vertical winding path, and on the ring nut, which remains fixed on the machine, along a substantially horizontal winding path.
  • the replacement of the filled tubes takes place simultaneously at a plurality of positions.
  • the thread wound on the pirn must be removed together with the same pirn, and the thread deposited on the ring nut must remain in such position, until the production step is restarted.
  • a second drawback is due to the fact that in some cases the lifting action does not cause the thread to be torn in the expected thread length, but causes, on the contrary, the turns wound on the pirn to unwind, so that the pirn is drawn and removed with its thread being still connected with the thread kept by the machine, with the obvious drawbacks deriving from such an occurrence, such as the need for a manual intervention, waste of thread, obstacles and soiling.
  • a disadvantage carrying a considerable weight, in particular when a large number, or even the totality, of the pirns of a spindle bed of the machine are replaced simultaneously, consists in that the pirn extraction device must also apply a large tearing force in order to tear the totality of the threads, which may be as high as hundreds of kilograms.
  • the tube-holder ring nuts have been modified, by shaping the circumferential notches on the upper rim of said ring nut, inside which the thread is forced to run, with a sharp horizontal cutting edge.
  • the present invention makes it possible the above reported drawbacks to be overcome, and the thread cutting stress to be considerably lowered.
  • the present invention consists in an improved tube-holder ring nut which, in its top portion, is constituted by one or more circumferential protrusions provided with notches.
  • Such notches may have a rectangular, triangular, semicircular, or an equivalent hollow profile.
  • a sharp blade is provided, in a substantially vertical position, i.e., in such a position that the length of thread under traction, running along a substantially vertical path, is intercepted according to a small acute angle, and the horizontal length of thread, anchored to the ring nut, is intercepted perpendicularly.
  • the thread-guide ring 3 reciprocates along a vertical route between an upper position, at a not shown level, and a lower position.
  • the speed of the reciprocating motion is such that the thread is wound with small-slope turns.
  • the thread-guide ring 3 When the bobbin is complete, according to as indicated by suitable sensors not shown in the figures, the thread-guide ring 3 performs an accelerated stroke, winding a spiral made of high-slope turns 5, and then reaches level 6, wherein it stops. Thus, some turns of thread are wound on the collar 7 of the spindle-holder ring nut.
  • a knurling, or an equivalent machining, of the surface of the collar 7, is carried out, in order to increase the grip of the thread on it, and reliably constrain the same thread.
  • two circumferential protrusions 8 and 9 are present, which are provided with notches, or hacks, 10 and 11, by which the thread guided towards the collar 7 by the thread-guide 3 is engaged and held, to run along a trajectory of spiral shape from the bobbin 1 to the collar 7.
  • the sharp blade 12 is positioned in correspondence of the notches 11 of the lower circumferential protrusion 9.
  • Said sharp blade is placed in a substantially vertical position, such as to meet the thread 13, which is pulled when the tube 2 is lifted according to the arrow S, with a very acute angle along the upper route towards the bobbin 1, and practically perpendicularly along the lower, horizontal route towards the ring nut.
  • the angle between the pulled thread and the outer surface of the sharp blade does not exceed the value of 20°.
  • the cutting action takes place with precision, and without generating frays in the thread.
  • a sharp blade 12 is present in correspondence of all of the notches of the circumferential protrusion and may be made as a plurality of lengths, or as a single length concerning all of the notches.
  • the blade 12 can be obtained by machining the circumferential outline, or it can be produced separately, and then fastened to it in correspondence of the notches.
  • the cutting edge of the blade 12 can have a linear shape, or it can be serrate.
  • the sharp blade 12 can be positioned in correspondence of the upper rim 8, inside the notches 10, or on both of the rims.
  • An advantageous characteristic of the invention is constituted by the fact that the cutting edge of the blade 12 is anyway in a sheltered protection, i.e., it cannot injury an operator who inadvertently approaches his hand to the tube-holder ring nut.
  • a preferred feature of the invention is that the radius R10 of the circumference which contains the innermost points of the notches of the upper rim is longer that the radius R11 of the circumference which contains the innermost points of the notches of the lower rim.
  • Such a condition ensures, in fact, that the thread 13 surely meets the cutting edge of the blade 12 in an efficacious position, whether it is on the rim 8, or on the rim 9, with the abrasion of the thread in other points, which can create drawbacks both during the doffing step, and during the step of winding resumption on the subsequent tube, being limited.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Storage Of Web-Like Or Filamentary Materials (AREA)

Claims (6)

1. Broche pour métiers à filer, ou pour métiers à retordre, comprenant un écrou annulaire porte-tube pourvu à sa partie supérieure d'encoches périphériques (10, 11) et d'au mois une lame (12) pour couper le fil (13) à la fin du filage ou du retordage, caractérisée en ce que les encoches (10, 11) sont formées dans au moins deux bords (8, 9) de l'écrou annulaire et en ce que la lame (12) est disposée dans au moins un desdits bords (8, 9) à l'intérieur des encoches (10, 11), dans une position sensiblement verticale de manière à rencontrer le fil (13) tiré par la bobine (1) pendant l'opération d'enlèvement de ladite bobine, suivant un angle aigu, de préférence inférieur à 20°.
2. Broche suivant la revendication 1, caractérisée en ce que la lame (12) est disposée à l'intérieur des encoches (11) formées dans le bord inférieur (9).
3. Broche suivant la revendication 1 ou 2, caractérisée en ce que la circonférence qui contient les points, les plus intérieurs, des encoches (10) du bord supérieur (8) a un rayon (R10) plus grand que le rayon (R11) de la circonférence qui contient les points, les plus intérieurs, des encoches (11) du bord inférieur (9).
4. Broche selon une ou plusieurs des revendications précédentes, caractérisée en ce que l'écrou annulaire sur lequel les spires du fil sont enroulées avant l'enlèvement de la bobine (1) comporte un collet (7) ayant une surface moletée, ou une surface ayant un fini équivalent, pour retenir de façon sûre le fil (13) qui y est enroulé.
5. Broche selon une ou plusieurs des revendications précédentes, caractérisée en ce que le bord coupant de la lame (12) a un contour linéaire ou denté.
6. Broche selon la revendication 1, caractérisée en ce que la lame (12) est disposée à l'intérieur des encoches (10) formées dans le bord supérieur (8).
EP88200177A 1987-02-13 1988-02-03 Broche d'un métier à filer ou à retordre Expired - Lifetime EP0278561B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT8719365A IT1208008B (it) 1987-02-13 1987-02-13 Composizioni miscibili con acqua abase di un polimeo cationico idrofilo e di un agente tensio-attivo anionico,e utili come agenti flocculanti
IT1936587 1987-02-13

Publications (2)

Publication Number Publication Date
EP0278561A1 EP0278561A1 (fr) 1988-08-17
EP0278561B1 true EP0278561B1 (fr) 1991-05-08

Family

ID=11157073

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88200177A Expired - Lifetime EP0278561B1 (fr) 1987-02-13 1988-02-03 Broche d'un métier à filer ou à retordre

Country Status (5)

Country Link
EP (1) EP0278561B1 (fr)
DE (1) DE3862648D1 (fr)
ES (1) ES2023247B3 (fr)
GR (1) GR3002002T3 (fr)
IT (1) IT1208008B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006021168A1 (de) * 2006-05-06 2007-11-08 Texparts Gmbh Fadentrennvorrichtung und Verfahren zur Herstellung einer Fadentrennvorrichtung

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4015707A1 (de) * 1990-05-16 1991-11-21 Zinser Textilmaschinen Gmbh Fadentrenneinrichtung fuer eine spindel einer spinn- oder zwirnmaschine
DE4336359A1 (de) * 1993-10-25 1995-04-27 Zinser Textilmaschinen Gmbh Fadentrennvorrichtung einer Ringspinn- oder -zwirnspindel
DE19755972B4 (de) * 1997-12-16 2006-11-23 Maschinenfabrik Rieter Ag Spinnvorrichtung
JP4001052B2 (ja) * 2003-05-13 2007-10-31 株式会社豊田自動織機 紡機における玉揚げ時の糸切断方法

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5218230U (fr) * 1975-07-17 1977-02-09
BE897919A (fr) * 1983-10-05 1984-01-30 Houget Duesberg Bosson Procede et appareillage pour le controle et le reamorcage du fil coupe lors du remplacement des bobines pleines se trouvant sur les broches d'un metier continu a filtre par des tubes vides.

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006021168A1 (de) * 2006-05-06 2007-11-08 Texparts Gmbh Fadentrennvorrichtung und Verfahren zur Herstellung einer Fadentrennvorrichtung
DE102006021168B4 (de) * 2006-05-06 2015-07-02 Saurer Components Gmbh Fadentrennvorrichtung und Verfahren zur Herstellung einer Fadentrennvorrichtung
CZ306471B6 (cs) * 2006-05-06 2017-02-08 Saurer Components Gmbh Zařízení pro oddělování nitě a způsob jeho výroby

Also Published As

Publication number Publication date
IT1208008B (it) 1989-06-01
GR3002002T3 (en) 1992-12-30
ES2023247B3 (es) 1992-01-01
EP0278561A1 (fr) 1988-08-17
DE3862648D1 (de) 1991-06-13
IT8719365A0 (it) 1987-02-13

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