EP0192835B1 - Apparatus for the continuous mass control of a fibre ribbon - Google Patents

Apparatus for the continuous mass control of a fibre ribbon Download PDF

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Publication number
EP0192835B1
EP0192835B1 EP85115578A EP85115578A EP0192835B1 EP 0192835 B1 EP0192835 B1 EP 0192835B1 EP 85115578 A EP85115578 A EP 85115578A EP 85115578 A EP85115578 A EP 85115578A EP 0192835 B1 EP0192835 B1 EP 0192835B1
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EP
European Patent Office
Prior art keywords
roll
sensing member
shaft
driven
plane
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EP85115578A
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German (de)
French (fr)
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EP0192835A1 (en
Inventor
Peter Oswald
Viktor Pietrini
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Maschinenfabrik Rieter AG
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Maschinenfabrik Rieter AG
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Publication of EP0192835A1 publication Critical patent/EP0192835A1/en
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H13/00—Other common constructional features, details or accessories
    • D01H13/14—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements
    • D01H13/22—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to presence of irregularities in running material
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G23/00—Feeding fibres to machines; Conveying fibres between machines
    • D01G23/06—Arrangements in which a machine or apparatus is regulated in response to changes in the volume or weight of fibres fed, e.g. piano motions
    • 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
    • D01H5/32—Regulating or varying draft
    • D01H5/38—Regulating or varying draft in response to irregularities in material ; Measuring irregularities

Definitions

  • the invention relates to a device for continuously determining the mass of a sliver according to the preamble of the first claim.
  • German draft specification No. 1265631 discloses a drafting system in which a fiber sliver is guided between a stationary and driven roller and a movable and towed roller that can be pressed against it.
  • a pulse generator which is not further described, touches the movable roller and, through the movements of this roller, produces a signal which is forwarded to a control system in order to change the speed of the driven roller accordingly.
  • the present invention is therefore based on the object of measuring the strip cross-section, as far as possible, free of interference. to get the tape mass.
  • the object is achieved by the p ru- ches in identifying the first Ans listed characteristics.
  • a device for continuously determining the mass of a fiber sliver 1 comprises a pair of measuring rollers, consisting of a driven roller 2 and one that is dragged by it, ie. H. roller 3 driven by friction.
  • Such rollers as shown in the figures, are referred to as stepped rollers and interlock with one another (see FIG. 2) in such a way that one for measuring the sliver cross-section or. of the sliver mass defined space 4 arises.
  • the driven roller 2 is driven by means of a shaft 5 connected to it in a rotationally fixed manner, which is mounted on both sides of the roller 2 in a bearing 6 and 7, respectively, with practically no play.
  • the bearings 6 and 7 are in turn attached to a base plate 8.
  • the dragged roller 3 is rotatably connected to an axis 9 which is rotatably mounted on both sides of the roller 3 in a bearing 10 and 11 practically without play.
  • This drag roller 3 is, respectively, to the cross section. to be able to measure the mass of the sliver located in said space 4, movable in the arrow directions M.
  • the two bearings 10 and 11 are each by means of leaf springs 12 with a carrier 13 fastened to the base plate 8 (in FIG. 1 only the support for the bearing 11 is visible) connected.
  • leaf springs which are arranged as spring struts, are stressed on the one hand in the direction of conveyance F (FIG. 1) of the fiber sliver 1 for buckling and in the mentioned directions of movement M on bending and are to be dimensioned such that buckling is avoided.
  • the sliver In order to be able to measure the sliver cross-section without air inclusion in room 4, the sliver must be compressed in this room. In order to obtain this compression, a pressure is exerted against the bearings 10 and 11 of the towed roller 3 by means of a compression spring 14 with a predetermined force, so that the roller 3 is pressed against the roller 2.
  • the pressure generated in the aforementioned space 4 not only creates forces in the bending direction of the leaf springs 12, i. H. perpendicular to the axes of rotation of the measuring rollers 2 and 3, but also parallel to these axes of rotation, d. H. in the directions S and T shown in FIG. 2.
  • the force in the direction T is emitted from the driven roller 2 via the shaft 5 onto the bearings 6 and 7, so that the driven roller is displaced as a result of the fixed and non-elastic arrangement of these bearings 2 cannot be pushed away from the force in the direction T.
  • the section modulus perpendicular to the section modulus in the bending direction is, in proportion, much larger than that in the bending direction, i. H. that the leaf springs 12 yield in the direction of movement M, but are very stiff in the mentioned direction of pressure S.
  • the support of the bearings 10 and 11 on the leaf springs 12 therefore has the advantage that the movable roller 3 cannot be pushed away in the direction S by the force.
  • the bearing 10 can nevertheless have a bracket 101 of length L and associated carrier 13 can be provided with a boom 131 with the same outreach.
  • one of the two leaf springs used for this bearing and designated by 121 can be provided in a region in which the force in the direction S exerts essentially no moment on the movable roller 3.
  • the length L can be chosen to be smaller or larger depending on the selection of the resistance moments of the leaf spring 121.
  • a sensor 18 with its touch surface 19 (FIG. 3) is arranged in a contactless manner relative to a peripheral surface 20 of the towed roller 3 in such a way that the center of this touch surface is essentially in an imaginary position ,
  • the axis of rotation (not marked) of the driven roller 2 and the towed roller 3 containing plane E (Fig. 1 and 3).
  • the sensor 18 is, for example, an eddy current sensor known per se and is fastened to the base plate 8 by means of a stand 21 and connected to the associated converter (not shown) by a connecting cable 22.
  • the stand is essentially perpendicular to the base plate 8.
  • the sliver 1 is moved by the compression of the compression springs 14 in space 4 by means of the driven roller 2 in the conveying direction F, which leads to movements of the towed roller 3 in the directions M when the sliver mass changes.
  • a distance A existing in the aforementioned fractions of a millimeter between the sensing surface 19 and the scanned peripheral surface 20 of the towed roller is changed, which is determined by the sensor 18 and passed on to the convertor as a voltage signal and then evaluated as a control signal, for example by the Control the speeds of drafting rollers or the speed of a feed roller at the entrance of a card.
  • the contactless scanning of the linear movements of the towed roller 3 in said plane E has the advantage that changes in mass of the fiber structure can be detected by the sensor in an analog linearity.
  • FIGS. 4 and 5 In order to largely avoid incorrect measurements due to different thermal expansion of the elements used, the variant shown with FIGS. 4 and 5 can be used. Elements of FIGS. 1 to 3 are provided with the same reference numbers.
  • the essential criterion of this variant is that the sensor 18 on the opposite side, i. H. is arranged next to and parallel to the driven roller 2, which makes the following changes necessary compared to the device of Figures 1 to 3:
  • This variant offers the advantage that a thermal expansion of the base plate that differs from the rollers has practically no influence in the favorable arrangement or no influence on the distance A between the peripheral surface 20 and the touch surface 19 in the maximum arrangement.
  • leaf springs it is also possible to choose flat steel profiles with appropriate buckling strength and elasticity and with a sufficient section modulus to counteract the force in the S direction.
  • a funnel 23 known per se is used to guide the sliver 1 into the space 4 between the rollers 2 and 3.

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

Description

Die Erfindung betrifft eine Vorrichtung zum kontinuierlichen Ermitteln der Masse eines Faserbandes gemäss Oberbegriff des ersten Anspruches.The invention relates to a device for continuously determining the mass of a sliver according to the preamble of the first claim.

Aus der deutschen Auslegeschrift Nr. 1265631 ist ein Streckwerk bekannt, bei welchem ein Faserband zwischen einer ortsfesten sowie angetriebenen .und einer dagegen andrückbaren bewegbaren sowie geschleppten Walze geführt wird. Ein Impulsgeber, welcher nicht weiter beschrieben ist, berührt dabei die bewegbare Walze und ruft durch die Bewegungen dieser Walze ein Signal hervor, das einer Steuerung weitergeleitet wird, um damit die Drehzahl der angetriebenen Walze entsprechend zu verändern.German draft specification No. 1265631 discloses a drafting system in which a fiber sliver is guided between a stationary and driven roller and a movable and towed roller that can be pressed against it. A pulse generator, which is not further described, touches the movable roller and, through the movements of this roller, produces a signal which is forwarded to a control system in order to change the speed of the driven roller accordingly.

Die Nachteile einer solchen Messung bestehen darin, dass durch die Berührung einerseits eine die Tastfläche des Impulsgebers abnützende Reibung entsteht und andererseits, dass durch zwischen Tastfläche und Walzenoberfläche geratende Fremdkörper Fehlmessungen entstehen können, und zwar hauptsächlich, wenn es sich um schmierende, einen Belag bildende Fremdkörper handelt. Solche Fehlmessungen können über eine längere Zeit unbeobachtet bleiben, was über eine längere Zeit zu unerwünschten Fehlern der Garnnummer führt.The disadvantages of such a measurement are that the contact creates friction on the one hand, which wears the sensing surface of the pulse generator, and, on the other hand, that incorrect measurements can occur due to foreign bodies that get between the sensing surface and the roller surface, mainly if they are lubricating foreign bodies that form a coating acts. Such incorrect measurements can remain unobserved over a longer period of time, which leads to undesirable errors in the yarn number over a longer period.

Der vorliegenden Erfindung liegt deshalb die Aufgabe zugrunde, ein von Störungen weitestgehend freies Messen des Bandquerschnittes resp. der Bandmasse zu erhalten. Die Aufgabe wurde durch die im Kennzeichnen des ersten Anspru- ches aufgeführten Merkmale gelöst.The present invention is therefore based on the object of measuring the strip cross-section, as far as possible, free of interference. to get the tape mass. The object is achieved by the p ru- ches in identifying the first Ans listed characteristics.

Vorteilhafte Ausführungsformen sind in den weiteren Ansprüchen aufgeführt.Advantageous embodiments are listed in the further claims.

Die Erfindung wird im folgenden anhand von lediglich Ausführungswege darstellenden Zeichnungen näher erläutert. Es zeigt :

  • Fig. 1 Eine Ansicht der erfindungsgemässen Vorrichtung in Richtung I (Fig. 2), halbschematisch dargestellt,
  • Fig. 2 eine Draufsicht der Vorrichtung von Fig. 1, teilweise dargestellt,
  • Fig. 3 einen Schnitt durch einen Teil der Vorrichtung von Fig. 1, gemäss den Linien II (Fig. 2).
  • Fig. 4 eine Variante der Vorrichtung von Fig. 1 in Richtung 111 (Fig. 5) gesehen,
  • Fig. 5 eine Draufsicht der Vorrichtung von Fig. 4, teilweise dargestellt.
The invention is explained in more detail below with the aid of drawings which only show execution routes. It shows :
  • 1 is a view of the device according to the invention in the direction I (Fig. 2), shown semi-schematically,
  • 2 is a plan view of the device of FIG. 1, partially shown,
  • Fig. 3 shows a section through part of the device of Fig. 1, along the lines II (Fig. 2).
  • 4 seen a variant of the device of FIG. 1 in the direction 111 (FIG. 5),
  • Fig. 5 is a plan view of the device of Fig. 4, partially shown.

Eine Vorrichtung zum kontinuierlichen Ermitteln der Masse eines Faserbandes 1 umfasst ein Messwalzenpaar, bestehend aus einer angetriebenen Walze 2 und einer von dieser geschleppten, d. h. durch Reibung angetriebenen Walze 3. Solche wie in den Figuren gezeigten Walzen werden als Stufenwalzen bezeichnet und greifen derart ineinander (siehe Fig. 2), dass dabei ein für das Messen des Faserbandquerschnittes resp. der Faserbandmasse abgegrenzter Raum 4 entsteht.A device for continuously determining the mass of a fiber sliver 1 comprises a pair of measuring rollers, consisting of a driven roller 2 and one that is dragged by it, ie. H. roller 3 driven by friction. Such rollers, as shown in the figures, are referred to as stepped rollers and interlock with one another (see FIG. 2) in such a way that one for measuring the sliver cross-section or. of the sliver mass defined space 4 arises.

Die angetriebene Walze 2 wird mittels einer damit drehfest verbundenen Welle 5 angetrieben, welche beidseits der Walze 2 in einem Lager 6 respektive 7 je praktisch spielfrei gelagert ist. Die Lager 6 und 7 sind ihrerseits auf einer Grundplatte 8 befestigt.The driven roller 2 is driven by means of a shaft 5 connected to it in a rotationally fixed manner, which is mounted on both sides of the roller 2 in a bearing 6 and 7, respectively, with practically no play. The bearings 6 and 7 are in turn attached to a base plate 8.

Die geschleppte Walze 3 ist drehfest mit einer Achse 9 verbunden, welche beidseits der Walze 3 in einem Lager 10 respektive 11 praktisch spielfrei drehbar gelagert ist. Diese geschleppte Walze 3 ist, um den Querschnitt resp. die Masse des sich im genannten Raum 4 befindlichen Faserbandes messen zu können, in den Pfeilrichtungen M bewegbar. Um diese, sich nur um Bruchteile von Millimetern handelnden Bewegungen reibungsfrei zu ermöglichen, sind die beiden Lager 10 und 11 (in Fig. 1 nur Lager 11 sichtbar) je mittels Blattfedern 12 mit einem auf der Grundplatte 8 befestigten Träger 13 (in Fig. 1 ist nur der Träger für das Lager 11 sichtbar) verbunden. Diese als Federbeine angeordneten Blattfedern sind einerseits in der Förderrichtung F (Fig. 1) des Faserbandes 1 auf Knickung und in den genannten Bewegungsrichtungen M auf Biegung beansprucht und sind so zu dimensionieren, dass eine Knickung vermieden wird.The dragged roller 3 is rotatably connected to an axis 9 which is rotatably mounted on both sides of the roller 3 in a bearing 10 and 11 practically without play. This drag roller 3 is, respectively, to the cross section. to be able to measure the mass of the sliver located in said space 4, movable in the arrow directions M. In order to enable these movements, which are only a fraction of a millimeter, without friction, the two bearings 10 and 11 (only bearing 11 visible in FIG. 1) are each by means of leaf springs 12 with a carrier 13 fastened to the base plate 8 (in FIG. 1 only the support for the bearing 11 is visible) connected. These leaf springs, which are arranged as spring struts, are stressed on the one hand in the direction of conveyance F (FIG. 1) of the fiber sliver 1 for buckling and in the mentioned directions of movement M on bending and are to be dimensioned such that buckling is avoided.

Um den Faserbandquerschnitt ohne Lufteinschluss im Raum 4 messen zu können, muss das Faserband in diesem Raum verdichtet werden. Um diese Verdichtung zu erhalten, wird gegen die Lager 10 und 11 der geschleppten Walze 3 je mittels einer Druckfeder 14 mit einer vorbestimmten Kraft ein Druck ausgeübt, so dass die Walze 3 gegen die Walze 2 gedrückt wird.In order to be able to measure the sliver cross-section without air inclusion in room 4, the sliver must be compressed in this room. In order to obtain this compression, a pressure is exerted against the bearings 10 and 11 of the towed roller 3 by means of a compression spring 14 with a predetermined force, so that the roller 3 is pressed against the roller 2.

Diese Federn 14 sind dabei an einem zum Träger 13 gehörenden Arm 15 (in Fig. 1 nur einer sichtbar) befestigt und drücken gegen eine diesem Arm 15 zugewandte Fläche 16 resp. 17 des Lagers 10 resp. 11.These springs 14 are attached to an arm 15 belonging to the carrier 13 (only one visible in FIG. 1) and press against a surface 16 or arm 16 facing this arm. 17 of the camp 10 respectively. 11.

Durch den im vorgenannten Raume 4 erzeugten Druck entstehen nicht nur Kräfte in der Biegerichtung der Blattfedern 12, d. h. senkrecht zu den Drehachsen der Messwalzen 2 und 3, sondern auch noch parallel zu diesen Drehachsen, d. h. in den in Fig. 2 eingezeichneten Richtungen S und T. Die Kraft in Richtung T wird dabei von der angetriebenen Walze 2 über die Welle 5 auf die Lager 6 und 7 abgegeben, sodass infolge der ortsfesten und nicht elastischen Anordnung dieser Lager sich die angetriebene Walze 2 von der Kraft in Richtung T nicht wegdrücken lässt.The pressure generated in the aforementioned space 4 not only creates forces in the bending direction of the leaf springs 12, i. H. perpendicular to the axes of rotation of the measuring rollers 2 and 3, but also parallel to these axes of rotation, d. H. in the directions S and T shown in FIG. 2. The force in the direction T is emitted from the driven roller 2 via the shaft 5 onto the bearings 6 and 7, so that the driven roller is displaced as a result of the fixed and non-elastic arrangement of these bearings 2 cannot be pushed away from the force in the direction T.

Andererseits ist es bekannt, dass bei Blattfedern das Widerstandsmoment senkrecht zum Widerstandsmoment in Biegerichtung, im Verhältnis sehr viel grösser ist als dasjenige in Biegerichtung, d. h. dass die Blattfedern 12 in der Bewegungsrichtung M nachgeben, in der erwähnten Druckrichtung S jedoch sehr steif sind. Das Abstützen der Lager 10 und 11 auf den Blattfedern 12 hat deshalb den Vorteil, dass sich auch die bewegbare Walze 3 nicht von der Kraft in Richtung S wegdrücken lässt.On the other hand, it is known that in the case of leaf springs, the section modulus perpendicular to the section modulus in the bending direction is, in proportion, much larger than that in the bending direction, i. H. that the leaf springs 12 yield in the direction of movement M, but are very stiff in the mentioned direction of pressure S. The support of the bearings 10 and 11 on the leaf springs 12 therefore has the advantage that the movable roller 3 cannot be pushed away in the direction S by the force.

Wie in den Figuren 1 und 2 mit punktierter Linie eingezeichnet, kann trotzdem das Lager 10 mit einem Ausleger 101 von der Länge L und der dazugehörige Träger 13 mit einem Ausleger 131 mit gleichweiter Ausladung versehen werden. Dadurch kann eine der beiden für dieses Lager verwendete und mit 121 bezeichnete Blattfeder in einem Bereich vorgesehen werden, in welchem die Kraft in Richtung S im wesentlichen kein Moment auf die bewegbare Walze 3 ausübt. Dabei versteht es sich, dass die Länge L je nach Wahl der Widerstandsmomente der Blattfeder 121 kleiner oder grösser gewählt werden kann.As shown in FIGS. 1 and 2 with a dotted line, the bearing 10 can nevertheless have a bracket 101 of length L and associated carrier 13 can be provided with a boom 131 with the same outreach. As a result, one of the two leaf springs used for this bearing and designated by 121 can be provided in a region in which the force in the direction S exerts essentially no moment on the movable roller 3. It goes without saying that the length L can be chosen to be smaller or larger depending on the selection of the resistance moments of the leaf spring 121.

Zur Messung der Bewegungen in den genannten Richtungen M der geschleppten Walze 3 ist ein Sensor 18 mit seiner Tastfläche 19 (Fig. 3) berührungslos gegenüber einer Umfangsfläche 20 der geschleppten Walze 3 angeordnet und zwar derart, dass die Mitte dieser Tastfläche im wesentlichen in einer gedachten, die Drehachse (nicht gekennzeichnet) der angetriebenen Walze 2 und der geschleppten Walze 3 beinhaltenden Ebene E (Fig. 1 und 3) liegt.To measure the movements in the above-mentioned directions M of the towed roller 3, a sensor 18 with its touch surface 19 (FIG. 3) is arranged in a contactless manner relative to a peripheral surface 20 of the towed roller 3 in such a way that the center of this touch surface is essentially in an imaginary position , The axis of rotation (not marked) of the driven roller 2 and the towed roller 3 containing plane E (Fig. 1 and 3).

Der Sensor 18, ist beispielsweise ein an sich bekannter Wirbelstromaufnehmer und ist mittels eines Ständers 21 auf der Grundplatte 8 befestigt sowie durch ein Verbindungskabel 22 mit dem dazugehörigen Convertor (nicht gezeigt) verbunden. Der Ständer steht dabei im wesentlichen senkrecht zur Grundplatte 8.The sensor 18 is, for example, an eddy current sensor known per se and is fastened to the base plate 8 by means of a stand 21 and connected to the associated converter (not shown) by a connecting cable 22. The stand is essentially perpendicular to the base plate 8.

Im Betrieb wird das Faserband 1 durch das durch die Druckfedern 14 verursachte Komprimieren desselben im Raume 4 mittels der angetriebenen Walze 2 in Förderrichtung F fortbewegt, was bei veränderter Faserbandmasse zu Bewegungen der geschleppten Walze 3 in den Richtungen M führt.In operation, the sliver 1 is moved by the compression of the compression springs 14 in space 4 by means of the driven roller 2 in the conveying direction F, which leads to movements of the towed roller 3 in the directions M when the sliver mass changes.

Durch diese Bewegungen wird ein zwischen der Tastfläche 19 und der abgetasteten Umfangsfläche 20 der geschleppten Walze bestehender Abstand A in den genannten Bruchteilen eines Millimeters verändert, was vom Sensor 18 festgestellt und als Spannungssignal an den Convertor weitergegeben und anschliessend als Steuersignal ausgewertet wird, um beispielsweise die Drehzahlen von Streckwerkswalzen oder die Drehzahl einer Speisewalze am Eingang einer Karde zu steuern.As a result of these movements, a distance A existing in the aforementioned fractions of a millimeter between the sensing surface 19 and the scanned peripheral surface 20 of the towed roller is changed, which is determined by the sensor 18 and passed on to the convertor as a voltage signal and then evaluated as a control signal, for example by the Control the speeds of drafting rollers or the speed of a feed roller at the entrance of a card.

Durch das kontaktlose Abtasten der linearen Bewegungen der geschleppten Walze 3 in der genannten Ebene E entsteht der Vorteil, dass Masseveränderungen des Faserverbandes in einer analogen Linearität vom Sensor erfasst werden können.The contactless scanning of the linear movements of the towed roller 3 in said plane E has the advantage that changes in mass of the fiber structure can be detected by the sensor in an analog linearity.

Um Fehlmessungen durch unterschiedliche Wärmedehnung der verwendeten Elemente weitestgehend zu vermeiden, kann die mit den Figuren 4 und 5 gezeigte Variante verwendet werden. Darin sind Elemente der Figuren 1 bis 3 mit denselben Bezugszeichen versehen.In order to largely avoid incorrect measurements due to different thermal expansion of the elements used, the variant shown with FIGS. 4 and 5 can be used. Elements of FIGS. 1 to 3 are provided with the same reference numbers.

Das wesentliche Kriterium dieser Variante besteht darin, dass der Sensor 18 auf der gegenüberliegenden Seite, d. h. neben und parallel zur angetriebenen Walze 2 angeordnet ist, was gegenüber der Vorrichtung der Figuren 1 bis 3 folgende Veränderungen notwendig macht :The essential criterion of this variant is that the sensor 18 on the opposite side, i. H. is arranged next to and parallel to the driven roller 2, which makes the following changes necessary compared to the device of Figures 1 to 3:

  • 1. Die angetriebene Walze 2 wird, wie in Fig. 5 gezeigt, sogenannt fliegend gelagert, sodass die Welle 5 auf derselben Seite der Walze 2 mit dem Lager 6 und 7 gelagert ist.1. The driven roller 2 is, as shown in FIG. 5, so-called overhung, so that the shaft 5 is mounted on the same side of the roller 2 with the bearings 6 and 7.
  • 2. Der Sensor 18 wird mittels Ständer 21 auf der, der Welle 5 gegenüber liegenden Seite der angetriebenen Walze 2 angeordnet und zwar in einer günstigen Anordnung derart, dass der Ständer 21 und die Welle 5 hintereinander, in Achsrichtung dieser Welle 5 gesehen, angeordnet sind.2. The sensor 18 is arranged by means of a stand 21 on the side of the driven roller 2 opposite the shaft 5, in a favorable arrangement such that the stand 21 and the shaft 5 are arranged one behind the other, as seen in the axial direction of this shaft 5 .

In einer maximalen Anordnung würde sich die entsprechende Symmetrieebene (nicht gekennzeichnet) des Ständers 21 mit einer gedachten, die Drehachse dieser Welle 5 beinhaltenden, senkrecht zur früher erwähnten Ebene E stehenden Ebene D decken.

  • 3. Je nach Dimension des Sensors 18 muss die Breite B (Fig. 5) der Umfangsfläche 20 vergrössert werden, um die Abtastung auf der ganzen Fläche 19 des Sensors 18 zu gewährleisten.
In a maximum arrangement, the corresponding plane of symmetry (not marked) of the stator 21 would coincide with an imaginary plane D, which contains the axis of rotation of this shaft 5 and is perpendicular to the plane E mentioned earlier.
  • 3. Depending on the dimension of the sensor 18, the width B (FIG. 5) of the peripheral surface 20 has to be increased in order to ensure the scanning on the entire surface 19 of the sensor 18.

Diese Variante bietet den Vorteil, dass eine zu den Walzen unterschiedliche Wärmedehnung der Grundplatte in der günstigen Anordnung praktisch keinen oder in der maximalen Anordnung keinen Einfluss auf den Abstand A zwischen der Umfangsfläche 20 und der Tastfläche 19 hat. Anstelle von Blattfedern können auch Flachstahlprofile von entsprechender Knickfestigkeit und Elastizität und mit einem genügenden Widerstandsmoment gewählt werden, um der Kraft in Richtung S genügend entgegenzuwirken.This variant offers the advantage that a thermal expansion of the base plate that differs from the rollers has practically no influence in the favorable arrangement or no influence on the distance A between the peripheral surface 20 and the touch surface 19 in the maximum arrangement. Instead of leaf springs, it is also possible to choose flat steel profiles with appropriate buckling strength and elasticity and with a sufficient section modulus to counteract the force in the S direction.

Die eigentliche Dimensionierung der Blattfedern oder Flachstahlprofile ist eine Frage der Konstruktion und muss von Fall zu Fall bestimmt werden.The actual dimensioning of the leaf springs or flat steel profiles is a question of construction and must be determined on a case-by-case basis.

Zur Führung des Faserbandes 1 in den Raum 4 zwischen den Walzen 2 und 3 wird ein an sich bekannter Trichter 23 verwendet.A funnel 23 known per se is used to guide the sliver 1 into the space 4 between the rollers 2 and 3.

Claims (7)

1. Device for continuous determination of the cross-section or mass of a fibre sliver (1) with a pair of measuring rolls (2 and 3) which can be pressed against each other, one of the rolls being stationary and driven and the other being arranged for substantially straight line movement away from the one roll and to be dragged along, and with a sensing member (18) provided with a sensing surface (19) for measuring the movements of the movable roll (3), characterised in that the sensing member (18) is a contactless sensing member as already known, the sensing surface (19) of which lies substantially in the imaginary plane (E) containing both centre axes of the rolls (2 and 3) and facing a peripheral surface (20) of the movable roll (3).
2. Device according to claim 1 characterised in that the sensing member (18) and the movable roll (3) are carried by supports (12, 21) which are substantially normal to the said plane (E) and mounted on a base plate (8) serving to receive the stationnary measuring roll (2).
3. Device according to claim 2 characterised in that the sensing member (18) is arranged near to the driven roll (2).
4. Device according to claim 3 characterised in that the sensing member (18) is so arranged near to the driven roll (2) that the support (21) of the sensing member and the shaft (5) of the driven roll (2) are arranged one behind the other considered in the axial direction of the shaft (5) of the driven roll (2).
5. Device according to claim 4 characterised in that the support (21) of the sensing member (18) and the said shaft (5) are so arranged on behind the other that the corresponding plane of symmetry (not shown) of the support (21) coincides with an imaginary plane (D) at right angles to the said plane (E) and containing the axis of rotation of this shaft (5).
6. Device according to claim 2 characterised in that the supports (12) of the movable roll (3) are leaf springs so arranged with their width parallel to the centre axis of the roll (3) that the movements of the movable roll (3) can be performed without friction.
7. Device according to claim 2 characterised in that, to press the movable roll (3) against the stationary roll (2), a spring (14) is provided on each side of the movable roll in such manner that transmission of force is carried out without friction.
EP85115578A 1985-02-15 1985-12-07 Apparatus for the continuous mass control of a fibre ribbon Expired EP0192835B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH719/85 1985-02-15
CH71985 1985-02-15

Publications (2)

Publication Number Publication Date
EP0192835A1 EP0192835A1 (en) 1986-09-03
EP0192835B1 true EP0192835B1 (en) 1989-04-26

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ID=4193583

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85115578A Expired EP0192835B1 (en) 1985-02-15 1985-12-07 Apparatus for the continuous mass control of a fibre ribbon

Country Status (5)

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US (1) US4646387A (en)
EP (1) EP0192835B1 (en)
JP (1) JPH07119756B2 (en)
DE (1) DE3569760D1 (en)
IN (1) IN166675B (en)

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US4947520A (en) * 1987-10-13 1990-08-14 John D. Hollingsworth On Wheels, Inc. Feed roll sensor for a textile carding machine
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JPH03180519A (en) * 1989-12-04 1991-08-06 Mas Fab Rieter Ag Method and device for continuous detection of fiber forming degree and fluctuation sliver
DE4012551C1 (en) * 1990-04-19 1991-06-27 Schubert & Salzer Maschinenfabrik Ag, 8070 Ingolstadt, De
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Also Published As

Publication number Publication date
IN166675B (en) 1990-06-30
EP0192835A1 (en) 1986-09-03
DE3569760D1 (en) 1989-06-01
US4646387A (en) 1987-03-03
JPS61187658A (en) 1986-08-21
JPH07119756B2 (en) 1995-12-20

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