EP0359914A1 - Drafting arrangement for spinning machines - Google Patents

Drafting arrangement for spinning machines Download PDF

Info

Publication number
EP0359914A1
EP0359914A1 EP89111508A EP89111508A EP0359914A1 EP 0359914 A1 EP0359914 A1 EP 0359914A1 EP 89111508 A EP89111508 A EP 89111508A EP 89111508 A EP89111508 A EP 89111508A EP 0359914 A1 EP0359914 A1 EP 0359914A1
Authority
EP
European Patent Office
Prior art keywords
section
operating position
pressure arm
punches
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.)
Granted
Application number
EP89111508A
Other languages
German (de)
French (fr)
Other versions
EP0359914B1 (en
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
Zinser Textilmaschinen GmbH
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, Zinser Textilmaschinen GmbH filed Critical Truetzschler GmbH and Co KG
Publication of EP0359914A1 publication Critical patent/EP0359914A1/en
Application granted granted Critical
Publication of EP0359914B1 publication Critical patent/EP0359914B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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 swung 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 swiveling the pressure arms, while in the closed position the mutually 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.
  • a drive lever (28) acts on the drive lever (24) 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 from 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.

Abstract

In a drafting arrangement for spinning machines, especially for drawing frames with lower rollers (11, 13) arranged in a stationary manner in stands (10) and with upper rollers (15-18) held by pressure arms, the pressure arms (14) are sub-divided into two portions (20, 21), of which the first portion (20) is mounted in the stands (10) by means of the pivot axle (19) and the second portion (21) is held on the first portion (20) by means of a joint (22) parallel to the pivot axle. For these two-part pressure arms there is a drive mechanism in which during closing, starting from the open position, the two portions (20, 21) move together until the first portion (20) reaches its operating position and subsequently the second portion (21) pivots about the joint (22) into its operating position. For opening, the movement takes place in reverse order. <IMAGE>

Description

Die Erfindung betrifft ein Streckwerk für Spinnereimaschinen, insbesondere für Strecken, mit stationär in Stanzen angeord­neten Unterwalzen und mit von Druckarmen gehaltenen Oberwalzen, die um eine zu den Unterwalzen parallele Schwenkachse aufschwenkbar und in der Betriebsposition mit Instanzen ver­riegelbar sind.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 swung open about a pivot axis parallel to the lower rollers and can be locked in the operating position with instances.

Bei einem bekannten Streckwerk (EP-B 0 062 185) sind mehrfach gebogene Druckarme vorgesehen, die alle Oberwalzen tragen. Der Antriebsmechanismus enthält pneumatische Pressen, mit welchen die Druckarme verschwenkbar sind. Außerdem ist eine weitere pneumatische Presse vorgesehen, mit welcher die Druckarme in der Betriebsposition verriegelbar sind.In a known drafting system (EP-B 0 062 185), 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. In addition, a further pneumatic press is provided, with which the pressure arms can be locked in the operating position.

Der Erfindung liegt die Aufgabe zugrunde, ein Streckwerk der eingangs genannten Art so auszubilden, daß ein großzügiges Freilegen des Streckwerkes durch Abschwenken der Druckarme möglich ist, während in geschlossener Stellung die zueinander einjustierte Position der Oberwalzen und Unterwalzen exakt eingenommen wird.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 swiveling the pressure arms, while in the closed position the mutually adjusted position of the top rollers and bottom rollers is exactly assumed.

Diese Aufgabe wird dadurch gelöst, daß jeder Druckarm in zwei Abschnitte unterteilt ist, von denen der erste Abschnitt mittels der Schwenkachse in den Stanzen gelagert und der zweite Abschnitt an dem ersten Abschnitt mit einem zur Schwenkachse parallelen Gelenk gehalten ist, und daß ein Antriebsmechanismus vorgesehen ist, der derart gestaltet ist, daß beim Schließen aus der geöffneten Stellung sich zunächst beide Abschnitte ge­meinsam bewegen, bis der erste Abschnitt seine Betriebsposition erreicht und anschließend der zweite Abschnitt um das Gelenk in seine Betriebsposition verschwenkt, und daß beim Öffnen zu­nächst der zweite Abschnitt aus seiner Betriebsposition heraus­schwenkt und danach erst der erste Abschnitt sich mit bewegt und ebenfalls aus seiner Betriebsposition herausschwenkt.This object is achieved in that 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.

Durch die Unterteilung jedes der Druckarme in zwei Abschnitte und die gestaffelte Bewegung ist es möglich, die Oberwalzen weitgehend durch radiale Bewegung den zugehörigen Unterwalzen zuzustellen, so daß eine hohe Lagegenauigkeit erreicht wird.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.

In weiterer Ausgestaltung der Erfindung wird vorgesehen, daß die beiden Abschnitte jedes Druckarms einen Schenkel eines Parallelogramms bilden, an dessen zu dem Druckarm im wesent­lichen parallelen Schenkel ein Antriebselement angreift und das mittels Federelementen in eine Grundstellung vorgespannt ist. Aufgrund des Vorspannens des Parallelogramms in seiner Grund­stellung wird dieses zunächst als Ganzes verschwenkt, bis der erste Abschnitt des Druckarms gegen einen Anschlag anläuft. Erst dann wird der zweite Abschnitt relativ zu dem ersten Abschnitt verschwenkt.In a further embodiment of the invention, it is provided that the two sections of 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.

Bei einer vorteilhaften Ausführungsform der Erfindung ist der zu dem Druckarm im wesentlichen parallele Schenkel mit einem Antriebshebel an die Schwenkachse und mit einem Kniehebelsystem an beide Abschnitte des Druckarms angelenkt. Das Kniehebel­system enthält gleichzeitig die das Parallelogramm in der Grundstellung vorspannenden Federelemente. In vorteilhafter Weitergestaltung wird dabei vorgesehen, daß das Kniehebelsystem in der Betriebsposition eine Über-Totpunkt-Verriegelung bildet. Dadurch wird erreicht, daß der Antriebsmechanismus eine in sich integrierte Verriegelung enthält, so daß keine zusätzliche Be­tätigung erfolgen muß.In an advantageous embodiment of the invention, 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. In an advantageous further development, it is provided that 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.

Weitere Merkmale und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung der in der Zeichnung darge­stellten Ausführungsform.

  • Fig. 1 zeigt eine Ansicht eines schematisch dargestellten Streckwerkes mit in der Betriebsposition befindlichen Druckarmen,
  • Fig. 2 das Streckwerk der Fig. 1 in einer Zwischenposition, d.h. mit teilweise abgeschwenkten Druckarmen und
  • Fig. 3 das Streckwerk nach Fig. 1 und 2 in vollständig ge­öffneter Position, d.h. mit abgeschwenkten Druckarmen.
Further features and advantages of the invention result from the following description of the embodiment shown in the drawing.
  • 1 shows a view of a schematically illustrated drafting system with pressure arms in the operating position,
  • Fig. 2, the drafting system of FIG. 1 in an intermediate position, ie with the pressure arms partially pivoted and
  • Fig. 3, the drafting system according to FIGS. 1 and 2 in the fully open position, ie with the pressure arms pivoted away.

Das in Fig. 1 bis 3 dargestellte Streckwerk enthält Stanzen (10), in welchen drei Unterwalzen (11, 12, 13) stationär ange­ordnet sind, die mit nicht näher dargestellten Antrieben ver­bunden sind. Den Unterwalzen (11, 12, 13) sind vier Oberwalzen (15, 16, 17, 18) zugeordnet. Die Walzenpaare (13, 18) und (12, 17) bilden ein Vorverzugsfeld und die Walzenpaare (12, 16) und (11, 15) ein Hauptverzugsfeld. Um die Streckfeldlänge sowohl des Vorverzugsfeldes als auch des Hauptverzugsfeldes einstellen zu können, sind die Oberwalzen (18) und (16) in Umfangsrichtung der zugehörigen Unterwalzen (12, 13) einstellbar angeordnet. Die nicht einstellbaren Oberwalzen (15, 17) werden von an bei­den Enden von je einem Druckarm (14) gehalten. Die Oberwalzen (16, 18) können bei einer ersten Ausführungsform ebenfalls von den Druckarmen (14) getragen werden. Es ist jedoch möglich, eine oder beide der Oberwalzen (16) oder (18) mittels getrennten Schwenkelementen an den Stanzen zu lagern, so daß diese Oberwalzen (16) oder (18) dann von den Druckarmen nur in die Betriebsposition überführt werden.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. In order to be able to set the stretching field length of both the pre-drafting field and the 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. In a first embodiment, the top rollers (16, 18) can also be carried by the pressure arms (14). However, it is possible to mount one or both of the top rollers (16) or (18) on the punches by means of separate pivot elements, so that these top rollers (16) or (18) are then only transferred from the pressure arms into the operating position.

Den Oberwalzen (15, 17) sind Belastungseinrichtungen (38, 39) zugeordnet, die an den Druckarmen (14) angebracht sind. Diese Belastungseinrichtungen (38, 39) pressen die Oberwalzen (15, 17) mit dem vorgeschriebenen Anpreßdruck gegen die zugehörigen Unterwalzen (11, 12). Für die Oberwalzen (16, 18) sind eben­falls nicht dargestellte Belastungseinrichtungen vorgesehen. Diese können den Belastungseinrichtungen (38, 39) entsprechen, oder nach einem anderen System ausgeführt sein.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.

jeder Druckarm (14) besteht aus zwei Abschnitten (20, 21). Der erste Abschnitt (20), der an den Stanzen (10) um eine zu den Unterwalzen (11, 12, 13) parallele Schwenkachse (19) ver­schwenkbar ist, trägt die beiden das Vorverzugsfeld begren­zenden Oberwalzen (17, 18). Der zweite Abschnitt (21) ist über ein Gelenk (22), das eine zu der Schwenkachse (19) parallele Achse aufweist, an den ersten Abschnitt (20) angelenkt. Der zweite Abschnitt (21) trägt die zu dem Hauptverzugsfeld ge­hörenden Oberwalzen (15, 16). Die beiden Abschnitte (20, 21) des Druckarms bilden mit einem Antriebshebel (24), der um die Schwenkachse (19) verschwenkbar ist, einem im wesentlichen zu den Abschnitten (20, 21) parallelen Schenkel (25) und zwei einen Kniehebel bildenden Hebeln (26, 27) ein Parallelogramm. An den Antriebshebel (24) greift in Abstand zu der Schwenkachse (19) ein Verstellhebel (28) an, der von einem nicht darge­stellten Antriebsglied zu einer hin- und hergehenden Bewegung angetrieben werden. Dieses Antriebsglied kann beispielsweise eine hydraulische oder pneuamtische Presse oder auch ein Kurbelantrieb sein.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. At a distance from the pivot axis (19), an adjusting lever (28) acts on the drive lever (24) 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.

Das in der vorstehend beschriebenen Weise gebildete Parallelo­gramm wird durch nicht dargestellte Federelemente in einer Grundstellung gehalten, in welcher die beiden Abschnitte (20, 21) des Druckarms (14) in etwa gestreckt hintereinander ange­ordnet sind. Wird der Verstellhebel (28) betätigt, um den Druckarm (14) aus der geöffneten Position (Fig. 3) in die ge­schlossene Position (Fig. 1) zu überführen, so verschwenkt er über den Antriebsriebshebel (24) das von den Abschnitten (20, 21) des Druckarms (14) und den Hebeln (24, 25, 26, 27) gebil­dete System zunächst als Ganzes. Erst wenn der Abschnitt (20) mit einer Anschlagfläche (40) gegen Anschläge (41) der Stanzen anläuft, wird die Schwenkbewegung dieses Abschnittes (20) ge­stoppt. Ein weiteres Verschieben des Stellhebels (28) führt zu einem weiteren Verschwenken des Antriebshebels (24), durch welches das Parallelogramm in sich verändert wird, wobei ins­besondere der Abschnitt (21) um die Schwenkachse (22) aus der in Fig. 2 dargestellten Position in die in Fig. 1 dargestellte Position verschwenkt wird.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.

Die beiden Hebel (26, 27) des Kniehebelsystems, die gemeinsam an dem Schenkel (25) angelenkt sind, sind bezüglich der Be­wegungsrichtung dieses Schenkels (25) auf gegenüberliegenden Seiten an dem Abschnitt (20) und an dem Abschnitt (21) ange­lenkt. Der Hebel (27), der zur Erzielung einer Elastizität ein Federpaket enthält, ist an einer Verlängerung des Abschnittes (20) angelenkt.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 lever (27), which contains a spring assembly to achieve elasticity, is articulated on an extension of the section (20).

Wenn der Abschnitt (21) seine Betriebsposition erreicht hat, in welcher er mit einer Anschlagfläche (42) gegen eine Anschlag­fläche (43) der Stanze (10) anläuft, haben die Hebel (25, 26, 27) noch nicht ihre Endposition erreicht. Der Antriebshebel (24) wird noch weiter verschwenkt, bis er durch einen Anschlag 33) gestoppt wird, der an dem Abschnitt (20) angebracht ist. Der Anlenkpunkt des Schenkels (25) an den Hebeln (26, 27) hat sich dabei über die Verbindungslinie des Anlenkpunktes des Hebels (26) an dem Abschnitt (21) und des Hebels (27) an der Verlängerung des Abschnittes (20) hinausbewegt, wobei eine elastische Deformation im Bereich des Federpakets des Hebels 27) aufgetreten war. Dadurch wird eine Über-Totpunkt-Sicherung erhalten.When the section (21) has reached its operating position, in which it abuts with a stop surface (42) against a stop surface (43) of the punch (10), the levers (25, 26, 27) have not yet reached their end position. The drive lever (24) is pivoted further until it is stopped by a stop 33) which is attached to the section (20). The articulation point of the leg (25) on the levers (26, 27) has moved beyond the connecting line of the articulation point of the lever (26) on the section (21) and the lever (27) on the extension of the section (20), an elastic deformation had occurred in the area of the spring assembly of the lever 27). This ensures that the dead center is secured.

Der Abschnitt (21) ist mit einer Rastnase (34) versehen, die sich in der Nähe seines Gelenkes (22) befindet, und die in der Endstellung (Fig. 1) eine Verriegelungsaussparung (35) der Stanzen (10) hintergreift. Auf diese Weise wird sichergestellt, daß auch bei einer Entlastung des Stellhebels (28) der Druckarm nicht als Ganzes um die Schwenkachse (19) aufgeschwenkt werden kann. Um diese Bewegung zuzulassen, ist es notwendig, daß zu­nächst erst der Abschnitt (21) aus seiner Betriebsposition (Fig. 1) in die Zwischenposition (Fig. 2) verschwenkt, in welcher er in etwa gestreckt hinter dem Abschnitt (20) liegt. Dies ist nur möglich, wenn der Schenkel (25) zurückgezogen wurde, so daß die Über-Totpunkt-Verriegelung der Hebel (26, 27) aufgehoben ist. Mittels des einzigen Antriebsmechanismus wird somit nicht nur eine Zustellbewegung, sondern auch gleichzeitig eine Verriegelung der Betriebsposition des Druckarmes (14) er­zielt. Die Stanzen (10) sind im Bereich, in welchem der Ab­schnitt (21) gegen die Anschlagfläche (43) anläuft, noch mit Zentrieransätzen (30) versehen. Außerdem weisen die Stanzen Führungen (31, 32) auf, in welchen die Achsen (36, 37) der nicht einstellbar in dem Druckarm (14) gehaltenen Walzen (15, 17) geführt und ausgerichtet sind. Auch diese Führungen (31, 32) tragen zu einer Gewährleistung der exakten Ausrichtung der Unterwalzen und Oberwalzen bei.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 from 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). In addition, 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.

Claims (9)

1. Streckwerk für Spinnereimaschinen, insbesondere für Strecken, mit stationär in Stanzen angeordneten Unterwalzen und mit von Druckarmen gehaltenen Oberwalzen, die um eine zu den Unterwalzen parallele Schwenkachse aufschwenkbar und in der Betriebsposition mit den Stanzen verriegelbar sind, dadurch gekennzeichnet, daß jeder Druckarm (14) in zwei Abschnitte (20, 21) unterteilt ist, von denen der erste Abschnitt (20) mittels der Schwenkachse (19) in den Stanzen gelagert und der zweite Abschnitt (21) an dem ersten Abschnitt (20) mit einem zur Schwenkachse (19) parallelen Gelenk (22) gehalten ist, und daß ein Antriebsmechanismus (24, 25, 26, 27) vorgesehen ist, der derart gestaltet ist, daß beim Schließen aus der geöffneten Stellung sich zunächst beide Abschnitte (20, 21) gemeinsam bewegen, bis der erste Abschnitt (20) seine Betriebsposition erreicht und anschließend der zweite Abschnitt (21) um das Gelenk (22) in seine Betriebsposition verschwenkt, und daß beim Öffnen zunächst der zweite Abschnitt (21) aus seiner Betriebsposition herausschwenkt und danach erst der erste Abschnitt (20) sich mit bewegt und ebenfalls aus seiner Betriebsposition herausschwenkt.1. Drafting device 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 about a pivot axis parallel to the lower rollers and can be locked in the operating position with the punches, characterized in that each pressure arm (14 ) is divided into two sections (20, 21), of which the first section (20) is mounted in the punches by means of the swivel axis (19) and the second section (21) on the first section (20) with one to the swivel axis (19 ) parallel joint (22) is held, and that a drive mechanism (24, 25, 26, 27) is provided, which is designed such that when closing from the open position, both sections (20, 21) first move together until the first section (20) reaches its operating position and then the second section (21) is pivoted about its hinge (22) into its operating position, and that when it first opens t the second section (21) swings out of its operating position and only then does the first section (20) move with it and also swings out of its operating position. 2. Streckwerk nach Anspruch 1, dadurch gekennzeichnet, daß die beiden Abschnitte (20, 21) jedes Druckarms (14) einen Schenkel eines Parallelogramms bilden, an dessen zu dem Druckarm (14) im wesentlichen parallelen Schenkel (25) ein An­triebselement (28) angreift und das mittels Federelementen (27) in eine Grundstellung vorgespannt ist.2. drafting device according to claim 1, characterized in that the two sections (20, 21) of each pressure arm (14) form a leg of a parallelogram, on the leg (25) substantially parallel to the leg (25) a drive element (28) attacks and which is biased into a basic position by means of spring elements (27). 3. Streckwerk nach Anspruch 1 und 2, dadurch gekennzeich­net, daß der zu dem Druckarm (14) im wesentlichen parallele Schenkel (25) mit einem Antriebshebel (24) an die Schwenkachse (19) und mit einem Kniehebelsystem (26, 27) an beide Abschnitte (20, 21) des Druckarms (14) angelenkt ist.3. drafting system according to claim 1 and 2, characterized in that the leg (25) substantially parallel to the pressure arm (14) with a drive lever (24) on the pivot axis (19) and with a toggle lever system (26, 27) on both Sections (20, 21) of the pressure arm (14) is articulated. 4. Streckwerk nach Anspruch 3, dadurch gekennzeichnet, daß der an den in der Schwenkachse (19) gelagerten Abschnitt (20) angreifende Hebel (27) des Kniehebelsystems als Federelement gestaltet ist.4. drafting device according to claim 3, characterized in that the on the in the pivot axis (19) mounted section (20) engaging lever (27) of the toggle lever system is designed as a spring element. 5. Streckwerk nach Anspruch 3 oder 4, dadurch gekennzeich­net, daß das Kniehebelsystem (26, 27) in der Betriebsposition eine Über-Totpunkt-Verriegelung bildet.5. drafting system according to claim 3 or 4, characterized in that the toggle lever system (26, 27) forms an over-dead-center lock in the operating position. 6. Streckwerk nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Endstellung des Parallelogramms mit einem Anschlag (33) begrenzt ist.6. drafting system according to one of claims 1 to 5, characterized in that the end position of the parallelogram is limited by a stop (33). 7. Streckwerk nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß den beiden Abschnitten (20, 21) jedes Druckarms (14) Zentrieranschläge (30, 31, 32) der Stanzen (10) zugeordnet sind.7. drafting system according to one of claims 1 to 6, characterized in that the two sections (20, 21) of each pressure arm (14) centering stops (30, 31, 32) of the punches (10) are assigned. 8. Streckwerk nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß zwischen dem zweiten Abschnitt (21) jedes Druckarms (14) und den Stanzen (10) eine Verriegelung (34, 35) vorgesehen ist.8. drafting system according to one of claims 1 to 7, characterized in that a lock (34, 35) is provided between the second section (21) of each pressure arm (14) and the punches (10). 9. Streckwerk nach Anspruch 8, dadurch gekennzeichnet, daß der zweite Abschnitt (21) jedes Druckarms (14) mit einer Verriegelungsnase (34) versehen ist, die ausschließlich durch ein Verschwenken um das ihn mit dem sich in seiner Betriebsposition befindenden ersten Abschnitt (20) verbindende Gelenk (22) mit einer Aussparung (35) der Stanzen (10) verriegelbar und entriegelbar ist.9. drafting system according to claim 8, characterized in that the second section (21) of each pressure arm (14) is provided with a locking lug (34), which is pivoted only about it with the first section (20 ) connecting joint (22) with a recess (35) of the punches (10) can be locked and unlocked.
EP89111508A 1988-09-21 1989-06-24 Drafting arrangement for spinning machines Expired - Lifetime EP0359914B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3832060 1988-09-21
DE3832060A DE3832060A1 (en) 1988-09-21 1988-09-21 STRETCHER FOR SPINNING MACHINES

Publications (2)

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

Family

ID=6363410

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89111508A Expired - Lifetime EP0359914B1 (en) 1988-09-21 1989-06-24 Drafting arrangement for spinning machines

Country Status (3)

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

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19548840A1 (en) * 1995-12-27 1997-07-03 Rieter Ingolstadt Spinnerei Easily serviced mechanism in a sliver doubling and drafting engine
EP1431433A1 (en) * 2002-12-20 2004-06-23 Maschinenfabrik Rieter Ag Drafting device structure
EP1469107A2 (en) * 2003-04-15 2004-10-20 Maschinenfabrik Rieter Ag Textile machine with a drafting arrangement
EP1739214A2 (en) * 2005-06-27 2007-01-03 Maschinenfabrik Rieter Ag Device for the forced guidance of the upperpart of an drafting device in an spinning preparation machine
CN103917707A (en) * 2011-09-21 2014-07-09 莱因哈特·科尼格 Folding drawing system for spin-knit machine
GB2494028B (en) * 2011-08-23 2015-09-30 Truetzschler & Co Device on a spinning room preparation machine having a drafting mechanism
EP4130361A1 (en) * 2021-08-04 2023-02-08 Maschinenfabrik Rieter AG Drafting arrangement and method for loading and opening the drafting frame

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0062185B1 (en) 1981-04-06 1986-02-26 Maschinenfabrik Rieter Ag Device for drafting a roving in spinning machines

Family Cites Families (3)

* 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 (en) * 1960-08-19 1963-04-04 Schurr Stahlecker & Grill Magnetic loading device for the top rollers of drafting systems of spinning machines
DD115715A1 (en) * 1974-03-01 1975-10-12

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0062185B1 (en) 1981-04-06 1986-02-26 Maschinenfabrik Rieter Ag Device for drafting a roving in spinning machines

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NICHTS ERMITTELT *

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19548840A1 (en) * 1995-12-27 1997-07-03 Rieter Ingolstadt Spinnerei Easily serviced mechanism in a sliver doubling and drafting engine
DE19548840B4 (en) * 1995-12-27 2008-04-03 Rieter Ingolstadt Spinnereimaschinenbau Ag Track for doubling and stretching slivers
EP1431433A1 (en) * 2002-12-20 2004-06-23 Maschinenfabrik Rieter Ag Drafting device structure
EP1469107A2 (en) * 2003-04-15 2004-10-20 Maschinenfabrik Rieter Ag Textile machine with a drafting arrangement
EP1469107A3 (en) * 2003-04-15 2005-08-31 Maschinenfabrik Rieter Ag Textile machine with a drafting arrangement
CN100451194C (en) * 2003-04-15 2009-01-14 里特机械公司 Textile machine with a drafting arrangement
EP1739214A2 (en) * 2005-06-27 2007-01-03 Maschinenfabrik Rieter Ag Device for the forced guidance of the upperpart of an drafting device in an spinning preparation machine
EP1739214A3 (en) * 2005-06-27 2009-04-08 Maschinenfabrik Rieter Ag Device for the forced guidance of the upperpart of an drafting device in an spinning preparation machine
GB2494028B (en) * 2011-08-23 2015-09-30 Truetzschler & Co Device on a spinning room preparation machine having a drafting mechanism
CN103917707A (en) * 2011-09-21 2014-07-09 莱因哈特·科尼格 Folding drawing system for spin-knit machine
CN103917707B (en) * 2011-09-21 2016-02-17 莱因哈特·科尼格 For the folding stretching unit of the braiding apparatus that spins
EP4130361A1 (en) * 2021-08-04 2023-02-08 Maschinenfabrik Rieter AG Drafting arrangement and method for loading and opening the drafting frame

Also Published As

Publication number Publication date
DE3832060A1 (en) 1990-03-22
JPH0299623A (en) 1990-04-11
JP2740286B2 (en) 1998-04-15
EP0359914B1 (en) 1992-09-09
DE58902249D1 (en) 1992-10-15

Similar Documents

Publication Publication Date Title
DE2303618A1 (en) INDEPENDENT DEVICE FOR ADJUSTING FRICTION CLUTCHES
DE69730795T2 (en) Pusher drive device for a toggle press
EP0396904B1 (en) Device for lifting and lowering an impression cylinder acting on a form cylinder
EP0359914B1 (en) Drafting arrangement for spinning machines
DE3933728C2 (en) Single-acting cylinder
DE19743111C2 (en) Device and method for moving two doors of a side wall of a printing unit
DE2611285C2 (en) Step-by-step switching device for rotary elements in machine tools
DE3843395C2 (en) Device for precise clamping of flexible printing plates
DE3323931C2 (en) Hydraulic press
DE2218562A1 (en) VULCANIZATION FORM FOR VEHICLE TIRES
EP1452301A2 (en) Toggle press
EP0058828B1 (en) Lever tool with progressive transmission
DE2825178C2 (en) Control device for operating a push-pull cable
AT410707B (en) APPARATUS FOR MOUNTING A HYDRAULIC HOSE TO A HOSE ARMATURE WITH A PRESS
DE2924551A1 (en) DOOR CONSTRUCTION FOR VEHICLES, CONSISTING OF ONE OR TWO DOORS
DE2723922A1 (en) FLOATING CALIPER DISC BRAKE
DE2652886A1 (en) Sheet material folding tool - has lower part of auxiliary punch movable relative to main punch and guided by pin engaging in slots
EP0786338A1 (en) Device for applying pressure to and withdrawing pressure from a cylinder
DE2657285C2 (en)
DE3112809C2 (en)
AT392755B (en) HYDRAULIC PRESS
DE2538547A1 (en) PRESSURE CYLINDERS WITH BUILT-IN SENSING DEVICE FOR THE WORK STROKE
EP0798439A1 (en) Device for snap-fixing a door wing
EP0504785B1 (en) Closing device for an injection mould
DE916885C (en) Coke oven door with locking device

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): CH DE FR IT LI

17P Request for examination filed

Effective date: 19900425

17Q First examination report despatched

Effective date: 19911029

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: TRUETZSCHLER GMBH & CO. KG

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): CH DE FR IT LI

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19920909

ITF It: translation for a ep patent filed

Owner name: BARZANO' E ZANARDO MILA

REF Corresponds to:

Ref document number: 58902249

Country of ref document: DE

Date of ref document: 19921015

EN Fr: translation not filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20010630

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20010827

Year of fee payment: 13

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF THE APPLICANT RENOUNCES

Effective date: 20020405

Ref country code: CH

Free format text: LAPSE BECAUSE OF THE APPLICANT RENOUNCES

Effective date: 20020405

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030101

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050624