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EP0350622B1 - Support and loading arm for drafting arrangements - Google Patents

Support and loading arm for drafting arrangements Download PDF

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Publication number
EP0350622B1
EP0350622B1 EP89110442A EP89110442A EP0350622B1 EP 0350622 B1 EP0350622 B1 EP 0350622B1 EP 89110442 A EP89110442 A EP 89110442A EP 89110442 A EP89110442 A EP 89110442A EP 0350622 B1 EP0350622 B1 EP 0350622B1
Authority
EP
European Patent Office
Prior art keywords
support
loading arm
leaf spring
spring
spring retainer
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
EP89110442A
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German (de)
French (fr)
Other versions
EP0350622A1 (en
Inventor
Hans Stahlecker
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.)
Maschinenfabrik Altstatten AG
Original Assignee
Maschinenfabrik Altstatten AG
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 Maschinenfabrik Altstatten AG filed Critical Maschinenfabrik Altstatten AG
Publication of EP0350622A1 publication Critical patent/EP0350622A1/en
Application granted granted Critical
Publication of EP0350622B1 publication Critical patent/EP0350622B1/en
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
    • D01H5/46—Loading arrangements
    • D01H5/50—Loading arrangements using springs
    • D01H5/505—Loading arrangements using springs for top roller arms

Definitions

  • the invention relates to a support and load arm for drafting systems with a longitudinally adjustable spring holder for a curved leaf spring, one leg of which is held by the spring holder and guided on the support and load arm and the other leg is provided with a receptacle for an axis of a pressure roller twin is.
  • the adjustable spring holder is designed as a threaded sleeve, which is provided with a washer and a nut, and with which one leg of the curved leaf spring on a mounting rail of the The load-bearing and low-load is firmly tensioned
  • the leg of the leaf spring attached to the mounting rail is provided with circular-shaped guide surfaces, the diameter of which corresponds to the inner distance corresponds to the side cheeks of the mounting rail.
  • the other leg of the leaf spring is provided with a receptacle for an axis of a pressure roller twin.
  • This receptacle is connected to a spacer bolt, the length of which is adapted to the inner spacing of the side cheeks of the mounting rail.
  • the relative arrangement of the receptacle on the spacer bolt can be adjusted in order to align the receptacle exactly with the associated lower roller.
  • this spacer bolt carries out sliding movements with which it slides on the side cheeks of the mounting rail.
  • the spring holder is a sliding piece which is held on the supporting and loading arm by means of a screw and can be locked in the respective working position
  • Leaf spring clamped which has at its other end a receptacle for the axis of a printing roller twin.
  • a support plate Arranged between the spring holder designed as a sliding piece and the leaf spring is a support plate provided with a slot and displaceable in the longitudinal direction of the leaf spring, the displacement of which allows the effective spring length to be set.
  • the axis of the printing roller twin is not set parallel to the associated lower roller.
  • the leaf spring will make rotational movements around the screw with which it is held on the spring holder.
  • the spring holder itself performs movements around the screw connecting it to the carrying and loading arm.
  • the invention has for its object to form a support and load arm of the type mentioned that the Parallelism between the printing roller twin and the associated lower roller is guaranteed without adjustment work.
  • leg of the leaf spring held with the spring holder is provided with a plurality of projecting tabs which are guided at a distance from one another on lateral guide surfaces of the supporting and loading arm and the leaf spring together with the receptacle transversely to the longitudinal direction of the supporting and loading arm align.
  • This configuration ensures that the leaf spring is aligned on its leg held on the spring holder and the teder end connected to the receptacle for the axis of a pressure roller twin can reliably transmit the set spring force to the pressure roller.
  • the receptacle for the axis of the pressure roller twin is at least post-processed after being attached to the leaf spring.
  • the receptacle is first attached to the leaf spring, after which the leaf spring is inserted with the receptacle into a device which corresponds to the holder formed from the spring holder and the carrying and loading arm and which is exactly aligned with a tool processing the receptacle. In this position, the recording is then taken, held and edited.
  • a support and loading arm (1) of a drafting system in particular a drafting system for a ring spinning machine, is only partially shown.
  • the support and load arm (1) has a U-shaped profile (2). It is supported at its end, not shown, on a support rod which runs parallel to the lower rollers of the drafting system, of which a lower roller (9) is shown.
  • the support and load arm (1) is guided on the support rod in such a way and is designed so stiff that it can be pivoted in a plane that runs perpendicular to the lower rollers (9).
  • the carrying and loading arm (1) carries several top rollers, of which only one top roller (6) is shown, and the corresponding ones Number are assigned to the lower rollers.
  • top roller (6) Between the top roller (6) and the bottom roller (9) runs a fuse (10), which is drawn to the desired yarn count in the drafting system.
  • a fuse (10 For an adaptation of the drafting system to the fiber material, it is necessary that at least one top roller delimiting the drawing field can be adjusted in the running direction of the fuse (10), ie in the longitudinal direction of the carrying and loading arm (1). It is also essential that the top rollers (6) run as precisely as possible parallel to the bottom rollers (9).
  • the top rollers (6) are usually designed as so-called pressure roller twins, which consist of two loose rollers, which are mounted on a common axis (7), which is held between the two pressure rollers (6).
  • the axis (7) of the pressure rollers (6) is arranged in a receptacle (8) which has an approximately semi-cylindrical recess.
  • the axis (7) is fixed in this recess by means of a bow spring (11).
  • the receptacle (8) for the axle (7) is attached to a leaf spring (12).
  • the attachment takes place via rivets, the bow spring (11) being riveted to the leaf spring (12) on the receptacle (8) at the same time.
  • the leaf spring (12) has in the area facing away from the receptacle (8) a hairpin-shaped section, to which the part carrying the receptacle (8) is connected via a crank.
  • the leaf spring (12) is fixed with the hairpin-shaped section in a spring holder (15), which in turn is held in the profile (2) of the supporting and loading arm (1).
  • the spring holder (15) also has a U-shaped profile open towards the lower rollers (9).
  • a screw (19) is screwed into its transverse web (16) and penetrates the transverse web (3) of the profile (2) in a longitudinal slot, so that the spring holder (15) can be adjusted and fixed in the longitudinal direction of the carrying and loading arm (1) is.
  • the leaf spring (12) is attached to the spring holder (15) with the free leg (14) of the hairpin-shaped section in the region of the apex in such a way that the leaf spring (12) swivels within certain limits about a transverse to the supporting and loading arm (1) running axis can perform.
  • the leaf spring (12) is provided in the region of this transverse axis with two opposite tabs (22, 23) which are inserted into slot-like receptacles (29) of the legs (17, 18) of the spring holder (15) which are open at the bottom.
  • a clamping piece (30) is arranged, which in corresponding recesses (32) of the legs (17, 18) of the spring holder (15) is pushed in from the side.
  • This clamping piece (30) is provided with a semi-cylindrical rib (31) which extends transversely to the carrying and loading arm (1) and which loads the tabs (22, 23) upwards towards the end of the receptacles (29) .
  • the surfaces (25, 26) delimiting the tabs (22, 23) in the longitudinal direction of the carrying and loading arm (1) are so tolerated to the width of the receptacles (29) that to a certain extent a pivoting movement is possible.
  • a real swivel bearing can also be provided in this area in a modified embodiment, for example by rounding the area of the receptacles (29) in which the tabs (22, 23) are in the operating position.
  • the tabs (22, 23) are dimensioned such that their end faces (24) protrude laterally over the legs (17, 18) of the spring holder (15) and on the inner walls of the legs (4th , 5) of the profile (2) of the supporting and loading arm (1) and are guided thereon.
  • the free end of the leg (14) of the leaf spring (12) is provided with two further tabs (20, 21) which protrude beyond the spring holder (15) in the longitudinal direction of the carrying and loading arm (1) and which correspond to the tabs to the side (22, 23) protrude and also with their end faces on the Inner surfaces of the legs (4, 5) of the profile (2) are guided.
  • the leaf spring (12) is thus guided over the tabs (20, 21, 22, 23) in the transverse direction directly on the inner surfaces of the legs (4, 5) of the profile (2) of the support and loading arm (1), ie independently of the pen holder.
  • This alignment between the leaf spring (12) and the load and load arm is not impaired.
  • the free end of the leg (14) of the hairpin-shaped area of the leaf spring (12) is assigned a loading element in the form of an eccentric bolt (36) which is provided with two flattened eccentric surfaces (37, 38), which are optionally attached to the leg (14) Plant can be brought.
  • the leaf spring (12) is preloaded in accordance with the radius of the eccentric surfaces (37 or 38).
  • a stop is assigned to the leg (13) of the leaf spring (12) and is designed in the form of a bolt (35) arranged between the legs (17, 18). This pin (35) limits the possible path of the leg (13) of the leaf spring (12) when the supporting and loading arm (1) is pivoted away from the lower rollers (9).
  • the leaf springs (12) are first produced during manufacture and into their final shape to be brought.
  • the receptacles (8) are then attached to the leaf springs (12), the receptacles (8) not yet having their final shape in the region of the cylindrical recess for the shafts (7).
  • the leaf springs (12) are then clamped in a device which has receiving and clamping elements which correspond to the receiving and clamping elements of the supporting and loading arm (1) and the spring holder (15).
  • This device is precisely aligned to a tool that is then brings the recess of the receptacle (8) to the final shape, so that the recess of the receptacle (8) regardless of any deformations of the leaf spring (12) caused during manufacture exactly to the tabs (20, 21, 22, 23) and thus is also aligned with the spring holder (15) and the supporting and loading arm (1).

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

Description

Die Erfindung betrifft einen Trag- und Belastungsarm für Streckwerke mit einem in Längsrichtung verstellbaren Federhalter für eine gebogene Blattfeder, deren einer Schenkel mittels des Federhalters gehalten und an dem Trag- und Belastungsarm geführt ist und deren anderer Schenkel mit einer Aufnahme für eine Achse eines Druckwalzenzwillinges versehen ist.The invention relates to a support and load arm for drafting systems with a longitudinally adjustable spring holder for a curved leaf spring, one leg of which is held by the spring holder and guided on the support and load arm and the other leg is provided with a receptacle for an axis of a pressure roller twin is.

Bei einem bekannten Trag- und Belastungsarm der eingangs genannten Art (DE-A 1560 284) ist der verstellbare Federhalter als eine Gewindehülse ausgebildet, die mit einer Unterlegescheibe und einer Mutter versehen ist, und mit der der eine Schenkel der gebogenen Blattfeder an einer Tragschiene des Trag- und Belastungsarmes fest spannbar ist. Der an der Tragschiene befestigte Schenkel der Blattfeder ist mit kreisbogenförmigen Führungsflächen versehen, deren Durchmesser dem Innenabstand der Seitenwangen der Tragschiene entspricht. Der andere Schenkel der Blattfeder ist mit einer Aufnahme für eine Achse eines Druckwalzenzwillings versehen. Diese Aufnahme ist mit einem Distanzbolzen verbunden, dessen Länge dem Innenabstand der Seitenwangen der Tragschiene angepaßt ist. Die relative Anordnung der Aufnahme auf dem Distanzbolzen ist einstellbar, um die Aufnahme exakt zu der Zugehörigen Unterwalze auszurichten. Während des Betriebes führt dieser Distanzbolzen der Aufnahme Gleitbewegungen aus, mit denen er an den Seitenwangen der Tragschiene gleitet. Es besteht die Gefahr, daß die dabei auftretenden Kräfte aufgrund von Verschleiß und/oder Verschmutzungen o.dgl. sich ändern, so daß nicht gewährleistet ist, daß die Druckwalzen tatsächlich mit der an der Blattfeder eingestellten Kraft an die zugehörige Unterwalze angedrückt werden.In a known support and loading arm of the type mentioned (DE-A 1560 284), the adjustable spring holder is designed as a threaded sleeve, which is provided with a washer and a nut, and with which one leg of the curved leaf spring on a mounting rail of the The load-bearing and low-load is firmly tensioned The leg of the leaf spring attached to the mounting rail is provided with circular-shaped guide surfaces, the diameter of which corresponds to the inner distance corresponds to the side cheeks of the mounting rail. The other leg of the leaf spring is provided with a receptacle for an axis of a pressure roller twin. This receptacle is connected to a spacer bolt, the length of which is adapted to the inner spacing of the side cheeks of the mounting rail. The relative arrangement of the receptacle on the spacer bolt can be adjusted in order to align the receptacle exactly with the associated lower roller. During operation, this spacer bolt carries out sliding movements with which it slides on the side cheeks of the mounting rail. There is a risk that the forces occurring due to wear and / or contamination or the like. change so that it is not guaranteed that the pressure rollers are actually pressed against the associated lower roller with the force set on the leaf spring.

Bei einem weiteren bekannten Trag- und Belastungsarm (DE-GM 19 09 951) ist der Federhalter ein Gleitstück, welches mittels einer Schraube an dem Trag- und Belastungsarm gehalten und in der jeweiligen Arbeitsstellung arretierbar ist.An diesem Gleitstück ist mittels einer weiteren Schraube eine Blattfeder festgespannt, die an ihrem anderen Ende eine Aufnahme für die Achse eines Druckwalzenzwillings aufweist. Zwischen dem als Gleitstück ausgebildeten Federhalter und der Blattfeder ist eine mit einem Schlitz versehene und in Längsrichtung der Blattfeder verschiebbare Auflageplatte angeordnet, durch deren Verschieben die wirksame Federlänge einstelbar ist. Bei der bekannten Bauart besteht die Gefahr, daß die Achse des Druckwalzenzwillings nicht parallel zu der zugehörigen Unterwalze eingestellt wird. Es besteht die Möglichkeit, daß die Blattfeder Drehbewegungen um die Schraube ausführt, mit der sie an dem Federhalter gehalten ist. Des weiteren besteht die Möglichkeit, daß der Federhalter selbst Bewegungen um die ihn mit dem Trag- und Belastungsarm verbindende Schraube durchführt.In a further known support and loading arm (DE-GM 19 09 951) the spring holder is a sliding piece which is held on the supporting and loading arm by means of a screw and can be locked in the respective working position Leaf spring clamped, which has at its other end a receptacle for the axis of a printing roller twin. Arranged between the spring holder designed as a sliding piece and the leaf spring is a support plate provided with a slot and displaceable in the longitudinal direction of the leaf spring, the displacement of which allows the effective spring length to be set. In the known type there is a risk that the axis of the printing roller twin is not set parallel to the associated lower roller. There is a possibility that the leaf spring will make rotational movements around the screw with which it is held on the spring holder. There is also the possibility that the spring holder itself performs movements around the screw connecting it to the carrying and loading arm.

Der Erfindung liegt die Aufgabe zugrunde, einen Trag- und Belastungsarm der eingangs genannten Art so auszubilden, daß die Parallelität zwischen dem Druckwalzenzwilling und der zugehörigen Unterwalze ohne Einstellarbeiten gewährleistet ist.The invention has for its object to form a support and load arm of the type mentioned that the Parallelism between the printing roller twin and the associated lower roller is guaranteed without adjustment work.

Diese Aufgabe wird dadurch gelöst, daß der mit dem Federhalter gehaltene Schenkel der Blattfeder mit mehreren abragenden Laschen versehen ist, die in Abstand zueinander an seitlichen Führungsflächen des Trag- und Belastungsarmes geführt sind und die Blattfeder mitsamt der Aufnahme quer zur Längsrichtung des Trag- und Belastungsarmes ausrichten.This object is achieved in that the leg of the leaf spring held with the spring holder is provided with a plurality of projecting tabs which are guided at a distance from one another on lateral guide surfaces of the supporting and loading arm and the leaf spring together with the receptacle transversely to the longitudinal direction of the supporting and loading arm align.

Durch diese Ausbildung wird sichergestellt, daß die Blattfeder an ihrem am Federhalter gehaltenen Schenkel ausgerichtet ist und das tederende, mit der Aufnahme für die Achse eines Druckwalzenzwillings verbundene Ende die eingestellte Federkraft zuverlässig auf die Druckwalze übertragen kann.This configuration ensures that the leaf spring is aligned on its leg held on the spring holder and the teder end connected to the receptacle for the axis of a pressure roller twin can reliably transmit the set spring force to the pressure roller.

Da die Blattfeder einerseits von dem Federhalter gehalten wird und sich andererseits direkt an den Führungsflächen des Trag- und Belastungsarmes abstützt, kann eine Verstellung des Federhalters oder eine Verstellung der Blattfeder in dem Federhalter zur Einstellung der Belastungskraft nicht zu Veränderungen der Position der Blattfeder in Querrichtung relativ zu dem Trag- und Belastungsarm führen, so daß die Relativposition der Blattfeder und damit auch der Aufnahme für die Achse des Druckwalzenzwillings mit hoher Sicherheit erhalten bleibt, ohne daß besondere Maßnahmen beim Verstellen des Federhalters getroffen werden müssen.Since the leaf spring is held on the one hand by the spring holder and on the other hand is supported directly on the guide surfaces of the supporting and loading arm, an adjustment of the spring holder or an adjustment of the leaf spring in the spring holder to adjust the loading force cannot change relative to changes in the position of the leaf spring in the transverse direction lead to the support and loading arm, so that the relative position of the leaf spring and thus also the receptacle for the axis of the pressure roller twin is retained with high certainty, without special measures having to be taken when adjusting the spring holder.

In weiterer Ausgestaltung der Erfindung wird vorgesehen, daß die Aufnahme für die Achse des Druckwalzenzwillings nach dem Anbringen an der Blattfeder wenigstens nachbearbeitet ist. Hierzu wird zunächst die Aufnahme an der Blattfeder angebracht, wonach die Blattfeder mit der Aufnahme in eine Vorrichtung eingesetzt wird, die der aus dem Federhalter und dem Trag- und Belastungsarm gebildeten Halterung entspricht und die exakt zu einem die Aufnahme bearbeitenden Werkzeug ausgerichtet ist. In dieser Stellung wird die Aufnahme dann gefaßt, festgehalten und bearbeitet. Dadurch wird sichergestellt, daß die Aussparung der Aufnahme, in welcher später die Achse des Druckwalzenzwillings aufgenommen wird, exakt zu dem Bereich der Blattfeder ausgerichtet ist, mit dem diese an dem Federhalter und später an einem Trag- und Belastungsarm abgestützt ist, ohne daß sich Toleranzen bemerkbar machen können, die in der Feder aufgrund der Herstellung entstanden sein können. Diese Toleranzen werden durch das nachträgliche Bearbeiten alle ausgeglichen.In a further embodiment of the invention it is provided that the receptacle for the axis of the pressure roller twin is at least post-processed after being attached to the leaf spring. For this purpose, the receptacle is first attached to the leaf spring, after which the leaf spring is inserted with the receptacle into a device which corresponds to the holder formed from the spring holder and the carrying and loading arm and which is exactly aligned with a tool processing the receptacle. In this position, the recording is then taken, held and edited. This ensures that the recess in the receptacle, in which the axis of the pressure roller twin is later accommodated, is aligned exactly with the area of the leaf spring is, with which this is supported on the spring holder and later on a support and loading arm, without the fact that tolerances that may have arisen in the spring due to the manufacture. These tolerances are all compensated for by subsequent processing.

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

Fig. 1
zeigt einen in Längsrichtung geführten Teilschnitt durch einen erfindungsgemäßen Trag- und Belastungsarm,
Fig. 2
eine teilweise aufgebrochene Ansicht auf den Trag- und Belastungsarm der Fig. 1 in Richtung des Pfeiles II gesehen,
Fig. 3
einen Schnitt entlang der Linie III-III der Fig. 1 und
Fig. 4
eine vergrößerte Einzelheit in einer Ansicht ähnlich Fig. 2.
Further features and advantages of the invention result from the following description of the embodiment shown in the drawing and the subclaims.
Fig. 1
shows a longitudinal section through a supporting and loading arm according to the invention,
Fig. 2
is a partially broken view of the support and loading arm of FIG. 1 seen in the direction of arrow II,
Fig. 3
a section along the line III-III of Fig. 1 and
Fig. 4
3 shows an enlarged detail in a view similar to FIG. 2.

In Fig. 1 und 2 ist ein Trag- und Belastungsarm (1) eines Streckwerkes, insbesondere eines Streckwerkes für eine Ringspinnmaschine, nur teilweise dargestellt. Der Trag- und Belastungsarm (1) weist ein U-förmiges Profil (2) auf. Er ist an seinem nicht dargestellten Ende auf einer Tragstange gelagert, die parallel zu den Unterwalzen des Streckwerkes verläuft, von denen eine Unterwalze (9) dargestellt ist. Der Trag- und Belastungsarm (1) ist auf der Tragstange derart geführt und derart steif ausgebildet, daß er in einer Ebene verschwenkbar ist, die lotrecht zu den Unterwalzen (9) verläuft. Der Trag- und Belastungsarm (1) trägt mehrere Oberwalzen, von denen nur eine Oberwalze (6) dargestellt ist, und die in entsprechender Anzahl den Unterwalzen zugeordnet sind. Zwischen der Oberwalze (6) und der Unterwalze (9) läuft eine Lunte (10), die in dem Streckwerk auf die gewünschte Garnfeinheit verstreckt wird. Für eine Anpassung des Streckwerkes an das Fasermaterial ist es notwendig, daß wenigstens eine das Streckfeld begrenzende Oberwalze in Laufrichtung der Lunte (10) einstellbar ist, d.h. in Längsrichtung des Trag- und Belastungsarmes (1). Außerdem ist es wesentlich, daß die Oberwalzen (6) möglichst exakt parallel zu den Unterwalzen (9) verlaufen. Die Oberwalzen (6) werden üblicherweise als sogenannte Druckwalzenzwillinge ausgebildet, die aus zwei Loswalzen bestehen, die auf einer gemeinsamen Achse (7) gelagert sind, die zwischen den beiden Druckwalzen (6) gehalten wird.1 and 2, a support and loading arm (1) of a drafting system, in particular a drafting system for a ring spinning machine, is only partially shown. The support and load arm (1) has a U-shaped profile (2). It is supported at its end, not shown, on a support rod which runs parallel to the lower rollers of the drafting system, of which a lower roller (9) is shown. The support and load arm (1) is guided on the support rod in such a way and is designed so stiff that it can be pivoted in a plane that runs perpendicular to the lower rollers (9). The carrying and loading arm (1) carries several top rollers, of which only one top roller (6) is shown, and the corresponding ones Number are assigned to the lower rollers. Between the top roller (6) and the bottom roller (9) runs a fuse (10), which is drawn to the desired yarn count in the drafting system. For an adaptation of the drafting system to the fiber material, it is necessary that at least one top roller delimiting the drawing field can be adjusted in the running direction of the fuse (10), ie in the longitudinal direction of the carrying and loading arm (1). It is also essential that the top rollers (6) run as precisely as possible parallel to the bottom rollers (9). The top rollers (6) are usually designed as so-called pressure roller twins, which consist of two loose rollers, which are mounted on a common axis (7), which is held between the two pressure rollers (6).

Bei der dargestellten Ausführungsform ist die Achse (7) der Druckwalzen (6) in einer Aufnahme (8) angeordnet, die eine etwa halbzylindrische Aussparung aufweist. Die Achse (7) wird in dieser Aussparung mittels einer Bügelfeder (11) fixiert.In the embodiment shown, the axis (7) of the pressure rollers (6) is arranged in a receptacle (8) which has an approximately semi-cylindrical recess. The axis (7) is fixed in this recess by means of a bow spring (11).

Die Aufnahme (8) für die Achse (7) ist an einer Blattfeder (12) befestigt. Bei der dargestellten Ausführungsform erfolgt die Befestigung über Nieten, wobei gleichzeitig die Bügelfeder (11) mit der Blattfeder (12) an der Aufnahme (8) vernietet wird.The receptacle (8) for the axle (7) is attached to a leaf spring (12). In the embodiment shown, the attachment takes place via rivets, the bow spring (11) being riveted to the leaf spring (12) on the receptacle (8) at the same time.

Die Blattfeder (12) besitzt in dem der Aufnahme (8) abgewandten Bereich einen haarnadelförmig gebogenen Abschnitt, an welchen der die Aufnahme (8) tragende Teil über eine Kröpfung angeschlossen ist. Die Blattfeder (12) ist mit dem haarnadelförmigen Abschnitt in einem Federhalter (15) fixiert, der seinerseits wieder in dem Profil (2) des Trag- und Belastungsarms (1) gehalten ist. Der Federhalter (15) besitzt ebenfalls ein U-förmiges zu den Unterwalzen (9) hin offenes Profil. In seinen Quersteg (16) ist eine Schraube (19) eingeschraubt, die den Quersteg (3) des Profils (2) in einem Längsschlitz durchdringt, so daß der Federhalter (15) in Längsrichtung des Trag- und Belastungsarms (1) verstellbar und fixierbar ist.The leaf spring (12) has in the area facing away from the receptacle (8) a hairpin-shaped section, to which the part carrying the receptacle (8) is connected via a crank. The leaf spring (12) is fixed with the hairpin-shaped section in a spring holder (15), which in turn is held in the profile (2) of the supporting and loading arm (1). The spring holder (15) also has a U-shaped profile open towards the lower rollers (9). A screw (19) is screwed into its transverse web (16) and penetrates the transverse web (3) of the profile (2) in a longitudinal slot, so that the spring holder (15) can be adjusted and fixed in the longitudinal direction of the carrying and loading arm (1) is.

Die Blattfeder (12) ist mit dem freien Schenkel (14) des haarnadelförmigen Abschnittes in dem Bereich des Scheitels derart an dem Federhalter (15) angebracht, daß die Blattfeder (12) in gewissen Grenzen eine Schwenkbewegung um eine quer zu dem Trag-und Belastungsarm (1) verlaufende Achse durchführen kann. Die Blattfeder (12) ist im Bereich dieser Querachse mit zwei gegenüberliegenden Laschen (22, 23) versehen, die in nach unten offene, schlitzartige Aufnahmen (29) der Schenkel (17, 18) des Federhalters (15) eingeführt sind. Im Bereich dieser Laschen (22, 23) ist auf der Unterseite des Schenkels (14) der Blattfeder (12) ein Klemmstück (30) angeordnet, das in entsprechende Aussparungen (32) der Schenkel (17, 18) des Federhalters (15) von der Seite her eingeschoben ist. Dieses Klemmstück (30) ist mit einer halbzylindrischen Rippe (31) versehen, die quer zu dem Trag- und Belastungsarm (1) verläuft und die die Laschen (22, 23) nach oben in Richtung zu dem Ende der Aufnahmen (29) hin belasten. Die die Laschen (22, 23) in Längsrichtung des Trag- und Belastungsarms (1) begrenzenden Flächen (25, 26) sind so zu der Breite der Aufnahmen (29) toleriert, daß in gewissem Umfang eine Schwenkbewegung möglich ist. Um die Schwenkbewegung zu erleichtern, kann bei einer abgewandelten Ausführungsform auch in diesem Bereich ein echtes Schwenklager vorgesehen werden, beispielsweise indem der Bereich der Aufnahmen (29), in welchem sich die Laschen (22, 23) in der Betriebsposition befinden, gerundet ist.The leaf spring (12) is attached to the spring holder (15) with the free leg (14) of the hairpin-shaped section in the region of the apex in such a way that the leaf spring (12) swivels within certain limits about a transverse to the supporting and loading arm (1) running axis can perform. The leaf spring (12) is provided in the region of this transverse axis with two opposite tabs (22, 23) which are inserted into slot-like receptacles (29) of the legs (17, 18) of the spring holder (15) which are open at the bottom. In the area of these tabs (22, 23) on the underside of the leg (14) of the leaf spring (12) a clamping piece (30) is arranged, which in corresponding recesses (32) of the legs (17, 18) of the spring holder (15) is pushed in from the side. This clamping piece (30) is provided with a semi-cylindrical rib (31) which extends transversely to the carrying and loading arm (1) and which loads the tabs (22, 23) upwards towards the end of the receptacles (29) . The surfaces (25, 26) delimiting the tabs (22, 23) in the longitudinal direction of the carrying and loading arm (1) are so tolerated to the width of the receptacles (29) that to a certain extent a pivoting movement is possible. In order to facilitate the swiveling movement, a real swivel bearing can also be provided in this area in a modified embodiment, for example by rounding the area of the receptacles (29) in which the tabs (22, 23) are in the operating position.

Wie insbesondere aus Fig. 4 zu ersehen ist, sind die Laschen (22, 23) so bemessen, daß ihre Stirnflächen (24) seitlich über die Schenkel (17, 18) des Federhalters (15) überstehen und an den Innenwandungen der Schenkel (4, 5) des Profils (2) des Trag- und Belastungsarms (1) anliegen und an diesem geführt sind. Das freie Ende des Schenkels (14) der Blattfeder (12) ist mit zwei weiteren Laschen (20, 21) versehen, die den Federhalter (15) in Längsrichtung des Trag- und Belastungsarms (1) überragen und die zur Seite hin entsprechend den Laschen (22, 23) überstehen und mit ihren Stirnflächen ebenfalls an den Innenflächen der Schenkel (4, 5) des Profils (2) geführt sind. Die Blattfeder (12) ist somit über die Laschen (20, 21, 22, 23) in Querrichtung direkt an den Innenflächen der Schenkel (4, 5) des Profils (2) des Trag- und Belastungsarms (1) geführt, d.h. unabhängig von dem Federhalter. Durch ein Lösen und Verstellen des Federhalters (15) wird diese Ausrichtung zwischen Blattfeder (12) und Trag- und Belastungsarm nicht beeinträchtigt.As can be seen in particular from Fig. 4, the tabs (22, 23) are dimensioned such that their end faces (24) protrude laterally over the legs (17, 18) of the spring holder (15) and on the inner walls of the legs (4th , 5) of the profile (2) of the supporting and loading arm (1) and are guided thereon. The free end of the leg (14) of the leaf spring (12) is provided with two further tabs (20, 21) which protrude beyond the spring holder (15) in the longitudinal direction of the carrying and loading arm (1) and which correspond to the tabs to the side (22, 23) protrude and also with their end faces on the Inner surfaces of the legs (4, 5) of the profile (2) are guided. The leaf spring (12) is thus guided over the tabs (20, 21, 22, 23) in the transverse direction directly on the inner surfaces of the legs (4, 5) of the profile (2) of the support and loading arm (1), ie independently of the pen holder. By loosening and adjusting the spring holder (15) this alignment between the leaf spring (12) and the load and load arm is not impaired.

Dem freien Ende des Schenkels (14) des haarnadelförmigen Bereichs der Blattfeder (12) ist ein Belastungselement in Form eines Exzenterbolzens (36) zugeordnet, der mit zwei abgeflachten Exzenterflächen (37, 38) versehen ist, die wahlweise an den Schenkel (14) zur Anlage bringbar sind. Entsprechend dem Radius der Exzenterflächen (37 oder 38) wird die Blattfeder (12) vorgespannt.The free end of the leg (14) of the hairpin-shaped area of the leaf spring (12) is assigned a loading element in the form of an eccentric bolt (36) which is provided with two flattened eccentric surfaces (37, 38), which are optionally attached to the leg (14) Plant can be brought. The leaf spring (12) is preloaded in accordance with the radius of the eccentric surfaces (37 or 38).

Dem Schenkel (13) der Blattfeder (12) ist ein Anschlag zugeordnet, der in Form eines zwischen den Schenkeln (17, 18) angeordneten Bolzens (35) gestaltet ist. Dieser Bolzen (35) begrenzt den möglichen Weg des Schenkels (13) der Blattfeder (12), wenn der Trag- und Belastungsarm (1) von den Unterwalzen (9) abgeschwenkt wird.A stop is assigned to the leg (13) of the leaf spring (12) and is designed in the form of a bolt (35) arranged between the legs (17, 18). This pin (35) limits the possible path of the leg (13) of the leaf spring (12) when the supporting and loading arm (1) is pivoted away from the lower rollers (9).

Um sicherzustellen, daß bei der Herstellung der Blattfeder (12) auftretende Verformungen oder Verwindungen der Blattfeder (12) die Ausrichtung der Druckwalzen (6) nicht beeinträchtigt, wird vorgesehen, daß bei der Herstellung zunächst die Blattfedern (12) hergestellt und in ihre endgültige Form gebracht werden. Anschließend werden die Aufnahmen (8) an den Blattfedern (12) angebracht, wobei die Aufnahmen (8) in dem Bereich der zylindrischen Aussparung für die Schäfte (7) noch nicht ihre endgültige Form aufweisen. Die Blattfedern (12) werden dann in eine Vorrichtung eingespannt,die Aufnahme- und Einspannelemente aufweist, die den Aufnahme- und Einspannelementen des Trag- und Belastungsarms (1) und des Federhalters (15) entsprechen. Diese Vorrichtung ist exakt zu einem Werkzeug ausgerichtet, das anschließend die Aussparung der Aufnahme (8) auf die endgültige Form bringt, so daß die Aussparung der Aufnahme (8) unabhängig von irgendwelchen während der Herstellung verursachten Deformationen der Blattfeder (12) exakt zu den Laschen (20, 21, 22, 23) und damit auch zu dem Federhalter (15) und dem Trag- und Belastungsarm (1) ausgerichtet ist.In order to ensure that deformations or twists of the leaf spring (12) occurring during the manufacture of the leaf spring (12) do not impair the alignment of the pressure rollers (6), it is provided that the leaf springs (12) are first produced during manufacture and into their final shape to be brought. The receptacles (8) are then attached to the leaf springs (12), the receptacles (8) not yet having their final shape in the region of the cylindrical recess for the shafts (7). The leaf springs (12) are then clamped in a device which has receiving and clamping elements which correspond to the receiving and clamping elements of the supporting and loading arm (1) and the spring holder (15). This device is precisely aligned to a tool that is then brings the recess of the receptacle (8) to the final shape, so that the recess of the receptacle (8) regardless of any deformations of the leaf spring (12) caused during manufacture exactly to the tabs (20, 21, 22, 23) and thus is also aligned with the spring holder (15) and the supporting and loading arm (1).

Claims (11)

  1. Support and loading arm (1) for drafting arrangements having a longitudinally adjustable spring retainer (15) for a bent leaf spring (12), with one leg (14) of the latter being held and guided on the support and loading arm (1) by the spring retainer (15), and its other leg (13) being provided with mounting means (8) for a shaft (7) of a twin press-roll (6), characterized in that that leg (14) of the leaf spring (12), which is held by the spring retainer (15), is provided with a plurality of spaced-apart projecting tongues (20, 21, 22, 23) which are guided on lateral guide faces (4, 5) of the support and loading arm (1) and which act to align the leaf spring (12), together with the mounting means (8), transversely to the longitudinal direction of the support and loading arm (1).
  2. Support and loading arm according to claim 1, characterized in that the spring retainer (15) is arranged between lateral guide faces (4, 5) of the support and loading arm (1) and that tongues (20, 21, 22, 23) provided on the leaf spring (12) project beyond the spring retainer (15) and are guided on the guide faces (4, 5) of the support and loading arm (1).
  3. Support and loading arm according to claim 1 or 2, characterized in that the support and loading arm (1) exhibits a U-shaped profile (2) opening toward the twin press-rolls (6, 7), the legs (4, 5) of the profile forming the lateral guide faces for the tongues (20, 21, 22, 23) of the leaf spring (12) and accommodating between them the likewise U-shaped spring retainer (15).
  4. Support and loading arm according to claim 3, characterized in that the spring retainer (15) is retained on the web portion (3) of the support and loading arm (1) by a screw (19) which is guided in a longitudinally extending slot.
  5. Support and loading arm according to any of claims 1 to 4, characterized in that the leaf spring (12) comprises, in the area opposite the mounting means (8), a section which is bent-off in the form of a hairpin and by which it is located in the spring retainer (15), the spring being held near its crown area for pivotal movement about a transverse axis (22, 23, 29, 30), and being loaded in the area of its free leg (4) by a loading element (36).
  6. Support and loading arm according to claim 5, characterized in that the loading element consists of an adjustable eccentric (36).
  7. Support and loading arm according to any of claims 1 to 6, characterized in that the spring retainer (15) is provided with stop means (35) limiting the travel of that leg (13) of the leaf spring (12) that carries the mounting means (8).
  8. Support and loading arm according to any of claims 1 to 7, characterized in that a pair of oppositely arranged tongues (22, 23) is guided in recesses (29) in the spring retainer (15) that extend transversely to the longitudinal direction of the support and loading arm (1).
  9. Support and loading arm according to claim 8, characterized in that the tongues (22, 23) of the leaf spring (12) are secured in the recesses (29) of the spring retainer (15) by a clamping piece (30).
  10. Support and loading arm according to any of claims 1 to 9, characterized in that the mounting means (8) for the shaft (7) of the twin press-rolls (6) is at least reworked after its attachment to the leaf spring (12).
  11. Support and loading arm according to any of claims 1 to 10, characterized in that the mounting means (8) coacts with a resilient retaining element (11) to retain the shaft (7).
EP89110442A 1988-07-14 1989-06-09 Support and loading arm for drafting arrangements Expired - Lifetime EP0350622B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3823872A DE3823872A1 (en) 1988-07-14 1988-07-14 LOW-LOAD AND LOW-LOAD FOR STRETCHERS
DE3823872 1988-07-14

Publications (2)

Publication Number Publication Date
EP0350622A1 EP0350622A1 (en) 1990-01-17
EP0350622B1 true EP0350622B1 (en) 1994-06-29

Family

ID=6358657

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89110442A Expired - Lifetime EP0350622B1 (en) 1988-07-14 1989-06-09 Support and loading arm for drafting arrangements

Country Status (4)

Country Link
US (1) US5027476A (en)
EP (1) EP0350622B1 (en)
JP (1) JPH0226926A (en)
DE (2) DE3823872A1 (en)

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DE102010034314A1 (en) 2010-08-13 2012-02-16 Wilhelm Stahlecker Gmbh System for drafting staple fiber strand, has printing rollers that are arranged on common roll provided with leaf spring used for generating spring force
DE102012105898A1 (en) 2012-07-03 2014-05-08 Maschinenfabrik Rieter Ag Arrangement for supporting a pressure roller on a load carrier of a drafting system and method for its production
CN104233533A (en) * 2014-10-10 2014-12-24 常德市恒天纺织机械有限公司 Pressurizing mechanism of plate spring cradle
CN104368794A (en) * 2014-11-14 2015-02-25 无锡阳工机械制造有限公司 Method for machining press roll support
CN104525904A (en) * 2014-11-14 2015-04-22 柳州兴杜工业贸易有限公司 Machining technology for industrial hardware structural part
CN104399949A (en) * 2014-11-14 2015-03-11 无锡阳工机械制造有限公司 Machining method of roll type structural part
CN104475706A (en) * 2014-11-14 2015-04-01 柳州兴杜工业贸易有限公司 Manufacturing technique for industrial roller-shaped structural member
CN104368798A (en) * 2014-11-14 2015-02-25 无锡阳工机械制造有限公司 Manufacturing method for press roller support
CN104439173A (en) * 2014-11-14 2015-03-25 柳州兴杜工业贸易有限公司 Manufacturing process for industrial hardware structural member
CN104439179A (en) * 2014-11-14 2015-03-25 柳州兴杜工业贸易有限公司 Machining process for industrial roller type structural member
CN104439178A (en) * 2014-11-14 2015-03-25 无锡阳工机械制造有限公司 Manufacturing method for compression-roll-shaped structural part
CN104475710A (en) * 2014-11-14 2015-04-01 柳州兴杜工业贸易有限公司 Processing technique for industrial compression roller bracket
CN104325115A (en) * 2014-11-14 2015-02-04 柳州市中配橡塑配件制造有限公司 Machining process of compressor-roller support
CN104399946A (en) * 2014-11-14 2015-03-11 无锡阳工机械制造有限公司 Processing method of hardware structural member
CN104399943A (en) * 2014-11-14 2015-03-11 无锡阳工机械制造有限公司 Machining method of roll type structural part
CN104439186A (en) * 2014-11-14 2015-03-25 无锡阳工机械制造有限公司 Method for machining roll type structural component
CN104525907A (en) * 2014-11-14 2015-04-22 柳州市中配橡塑配件制造有限公司 Manufacturing process of pressure roller bracket
CN104368799A (en) * 2014-11-14 2015-02-25 无锡阳工机械制造有限公司 Machining method for press roller support
CN104399948A (en) * 2014-11-14 2015-03-11 柳州兴杜工业贸易有限公司 Machining process of industrial press-roll-shaped structural part
CN104525906A (en) * 2014-11-14 2015-04-22 柳州市中配橡塑配件制造有限公司 Manufacturing process of roller structural part
CN104525908A (en) * 2014-11-14 2015-04-22 无锡阳工机械制造有限公司 Manufacturing method for press roll shaped structural member
CN104368797A (en) * 2014-11-14 2015-02-25 无锡阳工机械制造有限公司 Method for machining hardware structural component
CN104399950A (en) * 2014-11-14 2015-03-11 柳州兴杜工业贸易有限公司 Machining process of industrial roll-shaped structural part
CN104475707A (en) * 2014-11-14 2015-04-01 柳州市中配橡塑配件制造有限公司 Processing technique for pressing roller bracket
CN104439180A (en) * 2014-11-14 2015-03-25 柳州市中配橡塑配件制造有限公司 Manufacturing process for roller type structural member
CN104439172A (en) * 2014-11-14 2015-03-25 柳州兴杜工业贸易有限公司 Machining process for industrial press-roll-shaped structural member
CN104439182A (en) * 2014-11-14 2015-03-25 无锡阳工机械制造有限公司 Roll-formed structural part manufacturing method
CN104475705A (en) * 2014-11-14 2015-04-01 柳州兴杜工业贸易有限公司 Manufacturing technique for industrial compression roller bracket
CN104475709A (en) * 2014-11-14 2015-04-01 柳州市中配橡塑配件制造有限公司 Manufacturing technique for pressing roller bracket
CN104475703A (en) * 2014-11-14 2015-04-01 无锡阳工机械制造有限公司 Manufacturing method of hardware structure part
CN104475704A (en) * 2014-11-14 2015-04-01 无锡阳工机械制造有限公司 Processing method for roller type structural member
CN104439176A (en) * 2014-11-14 2015-03-25 无锡阳工机械制造有限公司 Manufacturing method for compression roll support
CN104525905A (en) * 2014-11-14 2015-04-22 柳州市中配橡塑配件制造有限公司 Machining technology of roller type structural part
CN104399947A (en) * 2014-11-14 2015-03-11 无锡阳工机械制造有限公司 Machining method of roll type structural part
CN104439174A (en) * 2014-11-14 2015-03-25 无锡阳工机械制造有限公司 Machining method for compression-roll-shaped structural part
CN104525903A (en) * 2014-11-14 2015-04-22 无锡阳工机械制造有限公司 Machining method of roller structural part
CN104439183A (en) * 2014-11-14 2015-03-25 无锡阳工机械制造有限公司 Method for machining roll type structural component

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Also Published As

Publication number Publication date
DE58907974D1 (en) 1994-08-04
JPH0226926A (en) 1990-01-29
EP0350622A1 (en) 1990-01-17
DE3823872A1 (en) 1990-01-18
US5027476A (en) 1991-07-02

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