EP0359914B1 - Dispositif d'étirage pour des métiers à filer - Google Patents

Dispositif d'étirage pour des métiers à filer Download PDF

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Publication number
EP0359914B1
EP0359914B1 EP89111508A EP89111508A EP0359914B1 EP 0359914 B1 EP0359914 B1 EP 0359914B1 EP 89111508 A EP89111508 A EP 89111508A EP 89111508 A EP89111508 A EP 89111508A EP 0359914 B1 EP0359914 B1 EP 0359914B1
Authority
EP
European Patent Office
Prior art keywords
section
frame according
operating position
frames
drafting
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
EP89111508A
Other languages
German (de)
English (en)
Other versions
EP0359914A1 (fr
Inventor
Bernhard Dipl.-Ing.(Fh) Zimmermann
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.)
Truetzschler GmbH and Co KG
Original Assignee
Truetzschler GmbH and Co KG
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 Truetzschler GmbH and Co KG filed Critical Truetzschler GmbH and Co KG
Publication of EP0359914A1 publication Critical patent/EP0359914A1/fr
Application granted granted Critical
Publication of EP0359914B1 publication Critical patent/EP0359914B1/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
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/56—Supports for drafting elements
    • D01H5/565—Top roller arms

Definitions

  • the invention relates to a drafting system for spinning machines, in particular for draw frames, with lower rollers arranged stationary in punches and with upper rollers held by pressure arms, which can be pivoted open about a pivot axis parallel to the lower rollers and can be locked in the operating position with instances.
  • multiply curved pressure arms are provided which carry all the top rollers.
  • the drive mechanism contains pneumatic presses with which the pressure arms can be pivoted.
  • a further pneumatic press is provided, with which the pressure arms can be locked in the operating position.
  • the invention has for its object to design a drafting system of the type mentioned so that a generous exposure of the drafting system is possible by pivoting the pressure arms, while in the closed position, the adjusted position of the top rollers and bottom rollers is exactly assumed.
  • each pressure arm is divided into two sections, of which the first section is mounted in the punches by means of the swivel axis and the second section is held on the first section with a joint parallel to the swivel axis, and in that a drive mechanism is provided , which is designed in such a way that when closing from the open position, first both sections move together until the first section reaches its operating position reached and then pivoted the second section around the hinge into its operating position, and that when opening the second section pivots out of its operating position and only then the first section moves with it and also pivots out of its operating position.
  • each of the pressure arms By dividing each of the pressure arms into two sections and the staggered movement, it is possible to move the upper rollers largely to the associated lower rollers by radial movement, so that a high degree of positional accuracy is achieved.
  • each pressure arm form a leg of a parallelogram, on the leg of which is essentially parallel to the pressure arm, a drive element engages and which is prestressed into a basic position by means of spring elements. Due to the preloading of the parallelogram in its basic position, it is initially pivoted as a whole until the first section of the pressure arm hits a stop. Only then is the second section pivoted relative to the first section.
  • the leg which is essentially parallel to the pressure arm is articulated with a drive lever on the pivot axis and with a toggle lever system on both sections of the pressure arm.
  • the toggle lever system also contains the spring elements that preload the parallelogram in the basic position.
  • the toggle lever system forms an over-dead center lock in the operating position. It is thereby achieved that the drive mechanism contains an interlock integrated in it, so that no additional actuation is required.
  • the drafting system shown in Fig. 1 to 3 contains punches (10), in which three lower rollers (11, 12, 13) are arranged in a stationary manner, which are connected to drives, not shown.
  • Four lower rollers (15, 16, 17, 18) are assigned to the lower rollers (11, 12, 13).
  • the roller pairs (13, 18) and (12, 17) form a pre-drafting field and the roller pairs (12, 16) and (11, 15) a main drafting field.
  • the top rollers (18) and (16) are arranged so as to be adjustable in the circumferential direction of the associated bottom rollers (12, 13).
  • the non-adjustable top rollers (15, 17) are held by a pressure arm (14) at each end.
  • the top rollers (16, 18) can also be carried by the pressure arms (14).
  • the upper rollers (15, 17) are assigned load devices (38, 39) which are attached to the pressure arms (14). These loading devices (38, 39) press the top rollers (15, 17) with the prescribed contact pressure against the associated lower rollers (11, 12). Load devices (not shown) are also provided for the upper rollers (16, 18). These can correspond to the loading devices (38, 39) or can be designed according to another system.
  • Each pressure arm (14) consists of two sections (20, 21).
  • the first section (20) which can be pivoted on the punches (10) about a pivot axis (19) parallel to the lower rollers (11, 12, 13), carries the two upper rollers (17, 18) delimiting the pre-drafting field.
  • the second section (21) is articulated to the first section (20) via a joint (22) which has an axis parallel to the pivot axis (19).
  • the second section (21) carries the top rollers (15, 16) belonging to the main drafting zone.
  • the two sections (20, 21) of the pressure arm form with a drive lever (24) which can be pivoted about the pivot axis (19), a leg (25) which is essentially parallel to the sections (20, 21) and two levers which form a toggle lever (26, 27) a parallelogram.
  • An adjustment lever (28) engages on the drive lever (24) at a distance from the pivot axis (19) and is driven by a drive element (not shown) to perform a reciprocating movement.
  • This drive member can be, for example, a hydraulic or pneumatic press or a crank drive.
  • the parallelogram formed in the manner described above is held in a basic position by spring elements (not shown), in which the two sections (20, 21) of the pressure arm (14) are arranged in a stretched manner one behind the other. If the adjusting lever (28) is actuated in order to transfer the pressure arm (14) from the open position (FIG. 3) to the closed position (FIG. 1), it pivots over the drive drive lever (24) that of the sections (20 , 21) of the pressure arm (14) and the levers (24, 25, 26, 27) system initially formed as a whole. Only when section (20) with a stop surface (40) against stops (41) of the punches, the pivoting movement of this section (20) is stopped.
  • a further displacement of the adjusting lever (28) leads to a further pivoting of the drive lever (24), by means of which the parallelogram is changed, in particular the section (21) about the pivot axis (22) from the position shown in FIG the position shown in Fig. 1 is pivoted.
  • the two levers (26, 27) of the toggle lever system which are jointly articulated on the leg (25), are articulated on the opposite side of the section (20) and the section (21) with respect to the direction of movement of this leg (25).
  • the section (21) is provided with a locking lug (34) which is located in the vicinity of its joint (22) and which in the end position (Fig. 1) engages behind a locking recess (35) in the punches (10). In this way it is ensured that the pressure arm is released even when the actuating lever (28) is relieved cannot be pivoted as a whole around the pivot axis (19). In order to allow this movement, it is first necessary that the section (21) is first pivoted out of its operating position (FIG. 1) into the intermediate position (FIG. 2), in which it lies approximately stretched behind the section (20). This is only possible if the leg (25) has been withdrawn so that the dead center locking of the levers (26, 27) is released.
  • the single drive mechanism thus not only achieves an infeed movement, but also simultaneously locks the operating position of the pressure arm (14).
  • the punches (10) are also provided with centering lugs (30) in the area in which the section (21) runs against the stop surface (43).
  • the punches have guides (31, 32) in which the axes (36, 37) of the rollers (15, 17) which are not adjustable in the pressure arm (14) are guided and aligned. These guides (31, 32) also contribute to ensuring the exact alignment of the lower and upper rollers.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)

Claims (9)

  1. Dispositif d'étirage pour des métiers à filer, essentiellement pour l'étirage avec des cylindres inférieurs disposés de façon stationnaire dans des estampes et avec des cylindres supérieurs retenus par des bras de pression pivotables autour d'un axe de pivotement parallèle aux cylindres inférieurs et verrouillables avec les estampes en position de fonctionnement, caractérisé en ce que chaque bras de pression (14) est divisé en deux sections (20, 21) dont la première (20) est logée dans les estampes moyennant l'axe de pivotement (19) et dont la deuxième (21) est fixée sur la première section (20) par une articulation (22) parallèle à l'axe de pivotement (19), et en ce qu'un mécanisme d'entraînement (24, 25, 26, 27) est prévu qui est configuré de telle sorte qu'à la fermeture à partir de la position ouverte, les deux sections (20, 21) se déplacent en commun jusqu'à ce que la première section (20) a atteint sa position de service et pivote ensuite la deuxième section (21) autour de l'articulation (22) dans sa position de service et en ce que, à l'ouverture, la deuxième section (21) pivote d'abord en dehors de sa position de service et ensuite seulement la première section (20) suit le déplacement et pivote également en dehors de sa position de service.
  2. Dispositif d'étirage selon la revendication 1, caractérisé en ce que les deux sections (20, 21) de chaque bras de pression (14) forment une branche d'un parallélogramme, un élément d'entraînement (28) agissant sur la branche (25) de ce dernier essentiellement parallèle au bras de pression (14) et que cet élément est prétendu dans une position initiale moyennant des éléments de ressort (27).
  3. Dispositif d'étirage selon les revendications 1 et 2, caractérisé en ce que la branche (25) essentiellement parallèle au bras de pression (14) est articulée avec un levier d'entraînement (24) sur l'axe de pivotement (19) et par un système à grenouillère (26, 27) sur les sections (20, 21) du bras de pression (14).
  4. Dispositif d'étirage selon la revendication 3, caractérisé en ce que le levier (27) du système à grenouillère agissant sur la section (20) logée dans l'axe de pivotement (19) est conçu comme élément ressort.
  5. Dispositif d'étirage selon la revendication 3 ou 4, caractérisé en ce que le système à grenouillère (26, 27) forme un verrouillage au-dessus du point mort.
  6. Dispositif d'étirage selon l'une des revendications 1 à 5, caractérisé en ce que la position extrême du parallélogramme est limitée par une butée (33).
  7. Dispositif d'étirage selon l'une des revendications 1 à 6, caractérisé en ce que des butées de centrage (30, 31, 32) des estampes (10) sont affectées aux deux sections (20, 21) de chaque bras de pression (14).
  8. Dispositif d'étirage selon l'une des revendications 1 à 7, caractérisé en ce que un verrouillage (34, 35) est prévu entre la deuxième section (21) de chaque bras de pression (14) et les estampes (10).
  9. Dispositif d'étirage selon la revendication 8, caractérisé en ce que la deuxième section (21) de chaque bras de pression (14) est muni d'un talon de verrouillage (34) ne pouvant être verrouillé et déverrouillé dans un évidement (35) des estampes (10) que par pivotement autour de l'articulation (22) reliant la première section (20) se trouvant dans sa position de service.
EP89111508A 1988-09-21 1989-06-24 Dispositif d'étirage pour des métiers à filer Expired - Lifetime EP0359914B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3832060 1988-09-21
DE3832060A DE3832060A1 (de) 1988-09-21 1988-09-21 Streckwerk fuer spinnereimaschinen

Publications (2)

Publication Number Publication Date
EP0359914A1 EP0359914A1 (fr) 1990-03-28
EP0359914B1 true EP0359914B1 (fr) 1992-09-09

Family

ID=6363410

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89111508A Expired - Lifetime EP0359914B1 (fr) 1988-09-21 1989-06-24 Dispositif d'étirage pour des métiers à filer

Country Status (3)

Country Link
EP (1) EP0359914B1 (fr)
JP (1) JP2740286B2 (fr)
DE (2) DE3832060A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19548840B4 (de) * 1995-12-27 2008-04-03 Rieter Ingolstadt Spinnereimaschinenbau Ag Strecke zum Doublieren und Verstrecken von Faserbändern
EP1431433A1 (fr) * 2002-12-20 2004-06-23 Maschinenfabrik Rieter Ag Structure d'un dispositif d'étirage
DE10317430B4 (de) * 2003-04-15 2011-05-12 Rieter Ingolstadt Gmbh Textilmaschine mit einem Streckwerk
DE102005030019A1 (de) * 2005-06-27 2006-12-28 Maschinenfabrik Rieter Ag Vorrichtung an einer Spinnereivorbereitungsmaschine
DE102011110844A1 (de) * 2011-08-23 2013-02-28 Trützschler GmbH & Co Kommanditgesellschaft Vorrichtung an einer Spinnereivorbereitungsmaschine, insbesondere Strecke, Karde, Kämmmaschine o.dgl. mit einem Streckwerk
EP2758576B1 (fr) * 2011-09-21 2016-06-22 König, Reinhard Banc d'étirage plieur pour un métier circulaire
DE102021120226A1 (de) * 2021-08-04 2023-02-09 Maschinenfabrik Rieter Ag Streckwerk und Verfahren zum Belasten und Öffnen des Streckwerks

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2787025A (en) * 1951-09-29 1957-04-02 Solanas Ramon Balmes Drawing mechanism for textile machines
DE1146791B (de) * 1960-08-19 1963-04-04 Schurr Stahlecker & Grill Magnetische Belastungsvorrichtung fuer die Oberwalzen von Streckwerken von Spinnereimaschinen
DD115715A1 (fr) * 1974-03-01 1975-10-12
EP0062185B2 (fr) 1981-04-06 1991-02-27 Maschinenfabrik Rieter Ag Dispositif d'étirage d'une bande de fibres pour machines de filature

Also Published As

Publication number Publication date
DE58902249D1 (de) 1992-10-15
JPH0299623A (ja) 1990-04-11
JP2740286B2 (ja) 1998-04-15
EP0359914A1 (fr) 1990-03-28
DE3832060A1 (de) 1990-03-22

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