EP0751243B1 - Device for measuring the thickness and/or evenness of slivers - Google Patents

Device for measuring the thickness and/or evenness of slivers Download PDF

Info

Publication number
EP0751243B1
EP0751243B1 EP96109123A EP96109123A EP0751243B1 EP 0751243 B1 EP0751243 B1 EP 0751243B1 EP 96109123 A EP96109123 A EP 96109123A EP 96109123 A EP96109123 A EP 96109123A EP 0751243 B1 EP0751243 B1 EP 0751243B1
Authority
EP
European Patent Office
Prior art keywords
measuring
adjustable
sliver
adjustable part
guide conduit
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
EP96109123A
Other languages
German (de)
French (fr)
Other versions
EP0751243A1 (en
Inventor
Jürg Zehr
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.)
Zellweger Luwa AG
Original Assignee
Zellweger Luwa 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 Zellweger Luwa AG filed Critical Zellweger Luwa AG
Publication of EP0751243A1 publication Critical patent/EP0751243A1/en
Application granted granted Critical
Publication of EP0751243B1 publication Critical patent/EP0751243B1/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
    • 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

Definitions

  • the invention relates to a device for measuring the thickness and / or non-uniformity of slivers, with a measuring part, which is a channel-like guide channel for the sliver and a mechanical and relative scanning of the sliver has adjustable scanning member to the guide channel.
  • Such a device is for example from the patent CH-668 833 known.
  • This device contains a funnel-shaped Compression element and a measuring element arranged on it for measuring the thickness of a sliver used for this purpose passes through a measuring channel.
  • the sliver is replaced by a Leaf spring scanned, which is provided with strain gauges and forms a scanning and measuring element. In the area of the leaf spring is the measuring channel with a semicircular cross-section educated.
  • the invention as characterized in the claims is thus solves the task of creating a device that avoids the disadvantages mentioned and a more precise measurement of the Thickness and / or irregularity of a sliver allowed.
  • the measuring channel one, the sliver Contacting, adjustable part that also formed channel-like and mounted on resilient supports is.
  • the deflection of the adjustable part preferably detected without contact.
  • the Measuring device is thus from the part that moves through the belt is separated. This can also be guaranteed by that the deflection is not on the adjustable part itself, but is detected on the resilient supports.
  • the device for the sliver now forms a measuring channel, which has a circular or oval cross section, in any case forms a boundary surface that is continuous runs, i.e. has no strongly changing radii or corners.
  • This cross section can easily pass through the sliver to be filled in completely.
  • the measuring element and that Element in contact with the sliver is not coupled are both easily interchangeable and the whole device can easily be adapted to the properties of the sliver to adjust.
  • measuring elements with a larger one Use measuring range are both easily interchangeable and the whole device can easily be adapted to the properties of the sliver to adjust.
  • Figure 1 shows the device 1 according to the invention in its environment. These include a so-called inlet funnel 2 on one Side of the device 1 and driven take-off rollers 3, 4 for the sliver on the other side.
  • the device 1 is in a housing 5 is arranged, in which a measuring part 6 and a Measuring element 7 are stored.
  • the measuring element 7 is preferred here designed as a distance meter, the distance without contact can measure.
  • the measuring element 7 can also be used as a pressure or Force meter be formed, which touches the measuring part 6, because the measuring principle used is irrelevant as long as it is desired measurement accuracy. It is therefore also mechanical Distance meters conceivable in which between the measuring part 6 and the measuring element 7 a preferably detachable mechanical connection consists.
  • FIG. 2 shows in particular the measuring part 6, the one compression part 8, a guide channel 9, a scanning element 10 and deflectable Carrier 11 and 12 has.
  • the scanning element 10 is the one Part of the measuring part 6, the sliver, not shown here contacted for the measurement and it consists of a fixed Part 13 and a movable or adjustable part 14.
  • Das Scanning element 10 is in an area contacting the fiber sliver, also formed gutter-like and forms a kind of Guide channel 15. This is on the one hand through the fixed part 13 and on the other hand by the adjustable part 14 against the Sliver limited.
  • a closed flow channel 16 is provided, whose cross-sectional area is larger than the cross-sectional area of the guide channel 15, which here by appropriate choice of Diameters is indicated. This also applies if the adjustable part 14 in a maximum deflected position to the fixed part 13.
  • the guide channel 15 is preferred through two half-shells, each with a semicircular cross-section formed, with a half-shell to the fixed part 13 and a half shell belongs to the movable part 14.
  • An outlet channel 17 is connected downstream of the guide channel 15 and, like the flow channel 16 a larger cross section than the guide channel 15.
  • the fixed and the adjustable part 13, 14 of the measuring element 10 are separated from each other by a separating slot 18 which is in the Areas of the fixed and adjustable part a section 19 in which it is parallel to an axis 20 of the measuring part runs.
  • the separating slot 18 has in the region of the ends of the adjustable part radially extending sections 21 and 22.
  • Figure 3 shows a section through the measuring part 6 in the area of Guide channel 15. This shows the ones already mentioned Half shells 23 and 24 and parts 25 and 26 of the separating slot 18.
  • a thin cover 28 on one of the half shells 23 or 24 can be fixed, which covers the separating slot 18 and prevents the sliver from getting stuck in it.
  • other solutions are known to prevent this problem.
  • Figure 5 shows again in a view from the outside, the fixed Part 13 and the movable part 14 and the beams 11 and 12 which are resilient, like a leaf spring.
  • FIG. 6 shows the fixed part 13 in a further embodiment and the movable part 14 ', which here only on a single Carrier 12 is attached.
  • the movable part 14 can also be tilted more easily than the fixed part 13.
  • This additional movement can be carried out by a further measuring system 29 the measuring system 7 already known from FIG. 1, or can be prevented by a guide acting in an area 30.
  • Strain gauges 33 attached directly to the carrier 12 be. These are preferably connected to detachable connections in the inlet funnel 2 connected, so that the measuring part shown also in is exchangeable in this case.
  • the operation of the device according to the invention is as follows:
  • the sliver runs through the inlet funnel 2 and passes through the pulling rollers 3 and 4, in a manner known per se, through the measuring part 6. It is compressed in the inlet funnel 2 and in the compression part 8 and thus reaches the feed channel 16.
  • the two half-shells 23, 24 or parts 13, 14 are pushed apart more or less against the force of the resilient carrier (s) 11, 12 in the scanning element 10.
  • the sliver then runs through the outlet part 17.
  • the movable part 14 is repositioned, at least temporarily, for the duration or length of a thick or thin point of the sliver, which is detected by the measuring element 7.
  • the position of the part 14 can also be detected via a section 27 of a carrier.
  • the position of the adjustable part 14 can also be detected at other or more points by a plurality of measuring elements 7, 29. This, for example, to monitor the parallelism of the two half-shells 23, 24 and to increase the measuring accuracy.
  • the movable part can also Have stop 31 of the movement of the movable part limited against the housing 5 and so an overextension of the Carrier or associated measuring elements prevented. Since that too measuring slivers can also cause a lot of dust, it is possible to blow air into the housing 5 via an opening 32 and build up an overpressure, the dust, the bottom could penetrate, keep away.
  • the material can be of different material or speed 6 can be replaced easily.
  • the measuring parts 6 can this purpose in relation to the shape of the half-shells 23, 24 which Restoring force of the carrier 11, 12 or the mass of the adjustable Part 14 differentiate. Generally, however, this measuring part has 6 a low mass and thus a high natural resonance frequency. So shorter defects in the sliver can also be recorded.

Description

Die Erfindung betrifft eine Vorrichtung zur Messung der Dicke und/oder Ungleichmässigkeit von Faserbändern, mit einem Messteil, welcher einen rinnenartigen Führungskanal für das Faserband und ein das Faserband mechanisch abtastendes und relativ zum Führungskanal verstellbares Abtastorgan aufweist.The invention relates to a device for measuring the thickness and / or non-uniformity of slivers, with a measuring part, which is a channel-like guide channel for the sliver and a mechanical and relative scanning of the sliver has adjustable scanning member to the guide channel.

Eine solche Vorrichtung ist beispielsweise aus der Patentschrift CH-668 833 bekannt. Diese Vorrichtung enthält ein trichterförmiges Verdichtungsorgan und ein an diesem angeordnetes Messorgan zur Messung der Dicke eines Faserbandes, welches zu diesem Zweck einen Messkanal durchläuft. Dabei wird das Faserband durch eine Blattfeder abgetastet, die mit Dehnungsmessstreifen versehen ist und ein Abtast- und Messorgan bildet. Im Bereiche der Blattfeder ist der Messkanal mit halbkreisförmigem Querschnitt rinnenförmig ausgebildet.Such a device is for example from the patent CH-668 833 known. This device contains a funnel-shaped Compression element and a measuring element arranged on it for measuring the thickness of a sliver used for this purpose passes through a measuring channel. The sliver is replaced by a Leaf spring scanned, which is provided with strain gauges and forms a scanning and measuring element. In the area of the leaf spring is the measuring channel with a semicircular cross-section educated.

Bei dieser bekannten Vorrichtung besteht die Möglichkeit, dass sich die Blattfeder durch die Reibung mit dem Faserband erwärmt. Da die Dehnungsmessstreifen sehr temperaturempfindlich sind, was hier bedeutet, dass diese je nach Temperatur andere Messwerte liefern können, sind zusätzliche Massnahmen zum Ausgleichen dieser Einflüsse vorzusehen. Ein weiterer Nachteil ergibt sich daraus, dass der Messkanal auf einer Seite durch die Blattfeder abgeschlossen ist und in diesem Bereiche Ecken aufweist, die durch das Faserband meistens nicht ausgefüllt werden. So ergibt sich eine inhomogene Füllung des Messkanales durch das Faserband, welche die Messgenauigkeit beeinträchtigt. Da die Blattfeder mit einem Messsystem nur schwer lösbar verbunden ist, ist eine Anpassung an verschiedene Messbereiche beispielsweise durch Auswechseln der Blattfeder oder des Messsystems eher aufwendig.In this known device there is the possibility that the leaf spring heats up due to the friction with the sliver. Since the strain gauges are very temperature sensitive, what here means that depending on the temperature different measured values can provide additional measures to compensate for this To provide influences. Another disadvantage arises from that the measuring channel on one side by the leaf spring is completed and has corners in this area that mostly not filled by the sliver. So results there is an inhomogeneous filling of the measuring channel through the sliver, which affects measurement accuracy. Because the leaf spring is connected to a measuring system only with difficulty an adaptation to different measuring ranges, for example Replacing the leaf spring or the measuring system is rather time-consuming.

Die Erfindung, wie sie in den Patentansprüchen gekennzeichnet ist, löst somit die Aufgabe, eine Vorrichtung zu schaffen, die die genannten Nachteile vermeidet und eine genauere Messung der Dicke und/oder Unregelmässigkeit eines Faserbandes erlaubt.The invention as characterized in the claims is thus solves the task of creating a device that avoids the disadvantages mentioned and a more precise measurement of the Thickness and / or irregularity of a sliver allowed.

Dies wird dadurch erreicht, dass der Messkanal einen, das Faserband kontaktierenden, dazu verstellbaren Teil aufweist, der ebenfalls rinnenartig ausgebildet und auf federnden Trägern montiert ist. Dabei wird die durch das Band bewirkte Auslenkung des verstellbaren Teils vorzugsweise berührungslos erfasst. Die Messeinrichtung ist damit von dem Teil, der durch das Band bewegt wird, getrennt. Dies kann auch dadurch gewährleistet sein, dass die Auslenkung nicht am verstellbaren Teil selbst, sondern an den federnden Trägern erfasst wird.This is achieved in that the measuring channel one, the sliver Contacting, adjustable part that also formed channel-like and mounted on resilient supports is. The deflection of the adjustable part preferably detected without contact. The Measuring device is thus from the part that moves through the belt is separated. This can also be guaranteed by that the deflection is not on the adjustable part itself, but is detected on the resilient supports.

Die durch die erfindungsgemässe Vorrichtung erreichten Vorteile sind insbesondere darin zu sehen, dass einerseits das eigentliche Messelement thermisch und mechanisch von denjenigen Elementen, die in Kontakt zum Faserband stehen, getrennt sein kann. Zudem bildet die Vorrichtung für das Faserband nun einen Messkanal, der einen kreisrunden oder ovalen Querschnitt aufweist, in jedem Falle also eine Begrenzungsfläche bildet, die stetig verläuft, also keine stark wechselnden Radien oder Ecken aufweist. Dieser Querschnitt kann problemlos durch das Faserband ganz ausgefüllt werden. Dadurch, dass das Messelement und dasjenige Element das in Kontakt zum Faserband steht nicht gekoppelt sind, sind beide auch leicht austauschbar und die ganze Vorrichtung lässt sich damit leicht an die Eigenschaften des Faserbandes anpassen. Zudem lassen sich Messelemente mit einem grösseren Messbereich einsetzen.The advantages achieved by the device according to the invention can be seen in particular in the fact that on the one hand the actual Measuring element thermally and mechanically from those elements that are in contact with the sliver can be separated. In addition, the device for the sliver now forms a measuring channel, which has a circular or oval cross section, in any case forms a boundary surface that is continuous runs, i.e. has no strongly changing radii or corners. This cross section can easily pass through the sliver to be filled in completely. In that the measuring element and that Element in contact with the sliver is not coupled are both easily interchangeable and the whole device can easily be adapted to the properties of the sliver to adjust. In addition, measuring elements with a larger one Use measuring range.

Im folgenden wird die Erfindung anhand eines Beispiels und mit Bezug auf die beiliegenden Figuren näher erläutert, wobei

  • Figur 1 einen Schnitt durch eine perspektivische Darstellung der erfindungsgemässen Vorrrichtung,
  • Figur 2 einen Schnitt durch einen Teil der Vorrichtung,
  • Figur 3 einen Querschnitt durch den Teil der Vorrichtung gemäss Fig. 2,
  • Figur 4 einen Längsschnitt durch den Teil der Vorrichtung gemääss Fig. 2 und
  • Figur 5 und 6 je eine perspektivische Ansicht des Teils gemäss Fig. 2 darstellt.
    • In the following the invention is explained in more detail using an example and with reference to the accompanying figures, wherein
  • FIG. 1 shows a section through a perspective view of the device according to the invention,
  • FIG. 2 shows a section through part of the device,
  • FIG. 3 shows a cross section through the part of the device according to FIG. 2,
  • 4 shows a longitudinal section through the part of the device according to FIG. 2 and
  • Figures 5 and 6 each represent a perspective view of the part of FIG. 2.

    • Figur 1 zeigt die erfindungsgemässe Vorrichtung 1 in ihrer Umgebung. Dazu gehören ein sogenannter Einlauftrichter 2 auf einer Seite der Vorrichtung 1 und angetriebene Abzugswalzen 3, 4 für das Faserband auf der anderen Seite. Die Vorrichtung 1 ist in einem Gehäuse 5 angeordnet, in welchem ein Messteil 6 und ein Messorgan 7 gelagert sind. Das Messorgan 7 ist hier vorzugsweise als Distanzmesser ausgebildet, der eine Distanz berührungslos messen kann. Das Messorgan 7 kann aber auch als Druck- oder Kraftmesser ausgebildet sein, das den Messteil 6 berührt, denn das dabei verwendete Messprinzip ist unerheblich, solange es die gewünschte Messgenauigkeit ermöglicht. Es sind daher auch mechanische Distanzmesser denkbar, bei denen zwischen dem Messteil 6 und dem Messorgan 7 eine vorzugsweise lösbare mechanische Verbindung besteht.Figure 1 shows the device 1 according to the invention in its environment. These include a so-called inlet funnel 2 on one Side of the device 1 and driven take-off rollers 3, 4 for the sliver on the other side. The device 1 is in a housing 5 is arranged, in which a measuring part 6 and a Measuring element 7 are stored. The measuring element 7 is preferred here designed as a distance meter, the distance without contact can measure. The measuring element 7 can also be used as a pressure or Force meter be formed, which touches the measuring part 6, because the measuring principle used is irrelevant as long as it is desired measurement accuracy. It is therefore also mechanical Distance meters conceivable in which between the measuring part 6 and the measuring element 7 a preferably detachable mechanical connection consists.

    Figur 2 zeigt insbesondere den Messteil 6, der einen Verdichtungsteil 8, einen Führungskanal 9, ein Abtastorgan 10 und auslenkbare Träger 11 und 12 aufweist. Das Abtastorgan 10 ist derjenige Teil des Messteils 6, der das hier nicht gezeigte Faserband für die Messung kontaktiert und es besteht aus einem festen Teil 13 und einem beweglichen oder verstellbaren Teil 14. Das Abtastorgan 10 ist in einem das Faserband kontaktierenden Bereich, ebenfalls rinnenartig ausgebildet und bildet eine Art von Führungskanal 15. Dieser wird einerseits durch den festen Teil 13 und andererseits durch den verstellbaren Teil 14 gegen das Faserband hin begrenzt. In Bewegungsrichtung des Faserbandes gesehen, dem Führungskanal 15 oder dem verstellbaren Teil 14 vorgeschaltet, ist ein geschlossener Vorlaufkanal 16 vorgesehen, dessen Querschnittsfläche grösser ist als die Querschnittsfläche des Führungskanals 15, was hier durch entsprechende Wahl von Durchmessern angedeutet ist. Dies trifft auch dann zu, wenn der verstellbare Teil 14 sich in einer maximal ausgelenkten Stellung zum festen Teil 13 befindet. Der Führungskanal 15 wird vorzugsweise durch zwei Halbschalen mit je halbkreisförmigem Querschnitt gebildet, wobei eine Halbschale zum festen Teil 13 und eine Halbschale zum beweglichen Teil 14 gehört. Ein Auslaufkanal 17 ist dem Führungskanal 15 nachgeschaltet und hat wie der Vorlaufkanal 16 einen grösseren Querschnitt als der Führungskanal 15. Der feste und der verstellbare Teil 13, 14 des Messorgans 10 sind durch einen Trennschlitz 18 voneinander getrennt, der im Bereiche des festen und des verstellbaren Teiles einen Abschnitt 19 aufweist in dem er parallel zu einer Achse 20 des Messteils verläuft. Der Trennschlitz 18 weist im Bereiche der Enden des verstellbaren Teils radial verlaufende Abschnitte 21 und 22 auf.Figure 2 shows in particular the measuring part 6, the one compression part 8, a guide channel 9, a scanning element 10 and deflectable Carrier 11 and 12 has. The scanning element 10 is the one Part of the measuring part 6, the sliver, not shown here contacted for the measurement and it consists of a fixed Part 13 and a movable or adjustable part 14. Das Scanning element 10 is in an area contacting the fiber sliver, also formed gutter-like and forms a kind of Guide channel 15. This is on the one hand through the fixed part 13 and on the other hand by the adjustable part 14 against the Sliver limited. In the direction of movement of the sliver seen, the guide channel 15 or the adjustable part 14th upstream, a closed flow channel 16 is provided, whose cross-sectional area is larger than the cross-sectional area of the guide channel 15, which here by appropriate choice of Diameters is indicated. This also applies if the adjustable part 14 in a maximum deflected position to the fixed part 13. The guide channel 15 is preferred through two half-shells, each with a semicircular cross-section formed, with a half-shell to the fixed part 13 and a half shell belongs to the movable part 14. An outlet channel 17 is connected downstream of the guide channel 15 and, like the flow channel 16 a larger cross section than the guide channel 15. The fixed and the adjustable part 13, 14 of the measuring element 10 are separated from each other by a separating slot 18 which is in the Areas of the fixed and adjustable part a section 19 in which it is parallel to an axis 20 of the measuring part runs. The separating slot 18 has in the region of the ends of the adjustable part radially extending sections 21 and 22.

    Figur 3 zeigt einen Schnitt durch den Messteil 6 im Bereiche des Führungskanals 15. Darin erkennt man die bereits oben erwähnten Halbschalen 23 und 24 sowie Teile 25 und 26 des Trennschlitzes 18. Wahlweise kann eine dünne Abdeckung 28 an einer der Halbschalen 23 oder 24 befestigt sein, die den Trennschlitz 18 überdeckt und verhindert, dass sich das Faserband darin verklemmt. Doch sind auch andere Lösungen bekannt um dieses Problem zu verhindern.Figure 3 shows a section through the measuring part 6 in the area of Guide channel 15. This shows the ones already mentioned Half shells 23 and 24 and parts 25 and 26 of the separating slot 18. Optionally, a thin cover 28 on one of the half shells 23 or 24 can be fixed, which covers the separating slot 18 and prevents the sliver from getting stuck in it. However, other solutions are known to prevent this problem.

    Aus Figur 4 sind nochmals der Vorlaufkanal 16, der Führungskanal 15 oder das Abtastorgan 10 sowie der Auslaufkanal 17 erkennbar und zwar aus einem, gegenüber Fig. 2 um 90 Grad verdrehten Sichtwinkel. From Figure 4 are again the flow channel 16, the guide channel 15 or the scanning element 10 and the outlet channel 17 can be seen namely from a twisted by 90 degrees compared to FIG. 2 Viewing angle.

    Figur 5 zeigt nochmals in einer Ansicht von aussen, den festen Teil 13 und den beweglichen Teil 14 sowie die Träger 11 und 12 die federnd, wie eine Blattfeder ausgebildet sind.Figure 5 shows again in a view from the outside, the fixed Part 13 and the movable part 14 and the beams 11 and 12 which are resilient, like a leaf spring.

    Figur 6 zeigt in einer weiteren Ausführung den festen Teil 13 und den beweglichen Teil 14', der hier nur an einem einzigen Träger 12 befestigt ist. Dadurch kann der bewegliche Teil 14 gegenüber dem festen Teil 13 auch leichter abgekippt werden. Diese Zusatzbewegung kann durch ein weiteres Messsystem 29 neben dem bereits aus Fig. 1 bekannten Messsystem 7 erfasst, oder durch eine in einem Bereiche 30 wirkende Führung verhindert werden. An Stelle der Messsysteme 7 und 29 können auch bekannte Dehnungsmessstreifen 33 direkt auf dem Träger 12 angebracht sein. Vorzugsweise sind diese an lösbare Anschlüsse im Einlauftrichter 2 angeschlossen, so dass der gezeigte Messteil auch in diesem Falle auswechselbar ist.FIG. 6 shows the fixed part 13 in a further embodiment and the movable part 14 ', which here only on a single Carrier 12 is attached. As a result, the movable part 14 can also be tilted more easily than the fixed part 13. This additional movement can be carried out by a further measuring system 29 the measuring system 7 already known from FIG. 1, or can be prevented by a guide acting in an area 30. Instead of the measuring systems 7 and 29, known ones can also be used Strain gauges 33 attached directly to the carrier 12 be. These are preferably connected to detachable connections in the inlet funnel 2 connected, so that the measuring part shown also in is exchangeable in this case.

    Die Wirkungsweise der erfindungsgemässen Vorrichtung ist wie folgt:
    Das Faserband läuft über den Einlauftrichter 2 ein und durchläuft, gezogen von den Abzugswalzen 3 und 4 in an sich bekannter Art den Messteil 6. Dabei wird es im Einlauftrichter 2 und im Verdichtungsteil 8 verdichtet und gelangt so in den Vorlaufkanal 16. Je nach Dichte des Faserbandes werden im Abtastorgan 10 die beiden Halbschalen 23, 24 oder Teile 13, 14 gegen die Kraft des oder der federnden Träger 11, 12 mehr oder weniger auseinandergedrängt. Anschliessend durchläuft das Faserband den Auslaufteil 17. Durch das Auseinanderdrängen der Teile 13 und 14 wird der bewegliche Teil 14 mindestens temporär, für die Dauer oder Länge einer Dick- oder Dünnstelle des Faserbandes neu positioniert, was durch das Messorgan 7 erfasst wird. Dieses gibt laufend Signale ab, die der aktuellen Stellung des beweglichen Teiles 14 entsprechen. Dabei kann, wie in Fig. 1 gezeigt, die Stellung des Teils 14 auch über einen Abschnitt 27 eines Trägers erfasst werden. Um die Messgenauigkeit zu verbessern, kann die Stellung des einstellbaren Teils 14 auch an anderen oder mehreren Stellen durch mehrere Messorgane 7, 29 erfasst werden. Dies beispielsweise um die Parallelität der beiden Halbschalen 23, 24 zu überwachen und um die Messgenauigkeit zu erhöhen.    The operation of the device according to the invention is as follows:
    The sliver runs through the inlet funnel 2 and passes through the pulling rollers 3 and 4, in a manner known per se, through the measuring part 6. It is compressed in the inlet funnel 2 and in the compression part 8 and thus reaches the feed channel 16. Depending on the density of the The two half-shells 23, 24 or parts 13, 14 are pushed apart more or less against the force of the resilient carrier (s) 11, 12 in the scanning element 10. The sliver then runs through the outlet part 17. By pushing the parts 13 and 14 apart, the movable part 14 is repositioned, at least temporarily, for the duration or length of a thick or thin point of the sliver, which is detected by the measuring element 7. This continuously emits signals that correspond to the current position of the movable part 14. As shown in FIG. 1, the position of the part 14 can also be detected via a section 27 of a carrier. In order to improve the measuring accuracy, the position of the adjustable part 14 can also be detected at other or more points by a plurality of measuring elements 7, 29. This, for example, to monitor the parallelism of the two half-shells 23, 24 and to increase the measuring accuracy.

    Wie aus Fig. 1 ersichtlich, kann der bewegliche Teil auch einen Anschlag 31 aufweisen, der die Bewegung des beweglichen Teils gegen das Gehäuse 5 hin begrenzt und so eine Überdehnung der Träger oder damit verbundener Messelemente verhindert. Da die zu messenden Faserbänder auch viel Staub verursachen können, ist es möglich über eine Öffnung 32 Luft in das Gehäuse 5 einzublasen und so einen Überdruck aufzubauen, der den Staub, der von unten eindringen könnte, fernhält.As can be seen from Fig. 1, the movable part can also Have stop 31 of the movement of the movable part limited against the housing 5 and so an overextension of the Carrier or associated measuring elements prevented. Since that too measuring slivers can also cause a lot of dust, it is possible to blow air into the housing 5 via an opening 32 and build up an overpressure, the dust, the bottom could penetrate, keep away.

    Zur Anpassung der Vorrichtung an Faserbänder mit anderer Dichte, anderem Material oder anderer Geschwindigkeit kann der Messteil 6 leicht ausgewechselt werden. Die Messteile 6 können sich zu diesem Zweck in bezug auf die Form der Halbschalen 23, 24, die Rückstellkraft der Träger 11, 12 oder die Masse des verstellbaren Teils 14 unterscheiden. Generell hat aber dieser Messteil 6 eine geringe Masse und damit eine hohe Eigenresonanzfrequenz. So lassen sich auch kürzere Fehler im Faserband erfassen.To adapt the device to fiber tapes with a different density, the material can be of different material or speed 6 can be replaced easily. The measuring parts 6 can this purpose in relation to the shape of the half-shells 23, 24 which Restoring force of the carrier 11, 12 or the mass of the adjustable Part 14 differentiate. Generally, however, this measuring part has 6 a low mass and thus a high natural resonance frequency. So shorter defects in the sliver can also be recorded.

    Claims (10)

    1. Device for measuring the thickness and/or irregularity of slivers, with a measuring part (6) which has a gutter-like guide conduit (9) for the sliver and a sensing member (10) which senses the sliver mechanically and which is adjustable relative to the guide conduit, characterized in that the sensing member is likewise of gutter-like design in a region in contact with the sliver and forms a kind of guide conduit (15), so that, in the measuring part, the sliver runs through a guide conduit consisting of a fixed part (13) and of a part (14) adjustable relative to the fixed part (13), in that the adjustable part is fastened to at least one deflectable carrier (11, 12), and in that, for measuring the thickness and/or irregularity of the sliver, a measuring member (7) is provided for measuring the adjustment of the adjustable part.
    2. Device according to Claim 1, characterized in that the measuring part has an approach conduit (16) which precedes the adjustable part of the guide conduit and surrounds the sliver on its entire circumference and which has a larger cross-section than the adjustable part together with the associated fixed part.
    3. Device according to Claim 1, characterized in that the measuring part has an exit conduit (17) which follows the adjustable part of the guide conduit (15) and surrounds the sliver on its entire circumference and which has a larger cross-section than the adjustable part together with the associated fixed part.
    4. Device according to Claim 1, characterized in that the fixed and adjustable parts (13, 14) of the measuring member (10) are separated from one another by a separating slit (18) which, in the region of the fixed and of the adjustable part, has a portion (19) in which it runs parallel to an axis (20) of the measuring part, and in that the separating slit has portions (21 and 22) running radially in the region of the ends of the adjustable part.
    5. Device according to Claim 1, characterized in that the adjustable part, together with the exit conduit, has two deflectable carriers (11, 12).
    6. Device according to Claim 1, characterized in that a distance-measuring system, which is isolated mechanically from the carrier, is provided as a measuring member (7) for measuring the adjustment of the adjustable part.
    7. Device according to Claim 1, characterized in that a further measuring system (29) is assigned to the adjustable part (14).
    8. Device according to Claim 1, characterized in that the guide conduit (15) is formed by two half-shells (23, 24) separated by a variable separating slit (19).
    9. Device according to Claim 1, characterized in that a pressure-measuring system is provided as a measuring member for measuring the adjustment of the adjustable part.
    10. Device according to Claim 1, characterized in that a force-measuring system is provided as a measuring member for measuring the adjustment of the adjustable part.
    EP96109123A 1995-06-29 1996-06-07 Device for measuring the thickness and/or evenness of slivers Expired - Lifetime EP0751243B1 (en)

    Applications Claiming Priority (3)

    Application Number Priority Date Filing Date Title
    CH1908/95 1995-06-29
    CH190895 1995-06-29
    CH190895 1995-06-29

    Publications (2)

    Publication Number Publication Date
    EP0751243A1 EP0751243A1 (en) 1997-01-02
    EP0751243B1 true EP0751243B1 (en) 1999-12-08

    Family

    ID=4221413

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP96109123A Expired - Lifetime EP0751243B1 (en) 1995-06-29 1996-06-07 Device for measuring the thickness and/or evenness of slivers

    Country Status (5)

    Country Link
    US (1) US5697247A (en)
    EP (1) EP0751243B1 (en)
    JP (1) JPH0913237A (en)
    CN (1) CN1157909A (en)
    DE (1) DE59603836D1 (en)

    Cited By (2)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE10233289A1 (en) * 2002-07-22 2004-02-12 Rieter Ingolstadt Spinnereimaschinenbau Ag Sensor to detect sliver build-up at drawframe is located at exit of the sliver inlet guide to the calender rollers
    DE10327469B4 (en) * 2002-07-06 2016-03-10 Rieter Ingolstadt Gmbh Sliver cross-section measuring device

    Families Citing this family (5)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    IT1302166B1 (en) * 1997-09-17 2000-07-31 Truetzschler & Co DEVICE ON A STRIRATOIO FOR THE MEASUREMENT OF A FIBRECOMPOSITE TAPE MADE OF FIBER TAPES
    US7103440B2 (en) * 2001-12-11 2006-09-05 Rieter Ingolstadt Spinnereimaschinenbau Ag Use of microwaves for sensors in the spinning industry
    DE10214955B9 (en) * 2002-04-04 2017-06-29 Rieter Ingolstadt Gmbh Spinning preparation machine
    CH701226A1 (en) * 2009-06-04 2010-12-15 Uster Technologies Ag Device for measuring mass of fiber band that is moved by e.g. drawing frame, in spinning outwork, has measuring body co-acting with scanning element and distanced from scanning element for measuring of pressure
    CN102207373B (en) * 2011-03-28 2013-06-12 南通宏大实验仪器有限公司 Data acquisition system and processing method for detecting evenness of fiber whisker

    Family Cites Families (17)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE150487C (en) *
    DE1510487C3 (en) * 1966-03-10 1975-11-20 Zinser-Textilmaschinen Gmbh, 7333 Ebersbach Device for equalizing the sliver thickness of fiber slivers
    GB1226082A (en) * 1968-01-31 1971-03-24
    US3822590A (en) * 1972-05-01 1974-07-09 Maremont Corp Textile sliver unevenness detecting
    CH553981A (en) * 1972-05-10 1974-09-13 Rieter Ag Maschf DEVICE FOR MEASURING DENSITY FLUCTUATIONS OF A FIBER SLIB IN SPINNING MACHINES.
    US3925850A (en) * 1973-11-01 1975-12-16 Fibers Controls Corp Density sensing and controlling equipment
    US3990292A (en) * 1974-12-13 1976-11-09 General Electric Company Frequency modulated fluidic gauge
    US4122703A (en) * 1976-11-24 1978-10-31 Davis Jesse B Method and apparatus for reeling discrete yarn strand patterns
    DE2657603A1 (en) * 1976-12-18 1978-06-22 Truetzschler & Co DEVICE FOR MEASURING A FIBER TAPE
    CH635373A5 (en) * 1979-04-06 1983-03-31 Zellweger Uster Ag MEASURING AND CONTROL DEVICE WITH A MEASURING FUNNEL FOR DETERMINING THE PULLING FORCE OF FIBER TAPES.
    CH651669A5 (en) * 1981-07-13 1985-09-30 Zellweger Uster Ag METHOD AND DEVICE FOR DETERMINING THE SUBSTANCE QUANTITY OR DENSITY OF FIBER QUANTITIES, IN PARTICULAR THE SUBSTANCE CROSS-SECTION OF FIBER TAPES.
    DE3237357C2 (en) * 1982-01-18 1985-12-19 Zellweger Uster Ag, Uster Device for measuring characteristic features of fiber material
    IT1179098B (en) * 1984-09-06 1987-09-16 Cselt Centro Studi Lab Telecom IMPROVEMENTS IN CONDENSER EQUIPMENT FOR MEASURING THE DIAMETER OF DIELECTRIC FIBERS
    CH668833A5 (en) * 1986-01-16 1989-01-31 Zellweger Uster Ag DEVICE FOR MEASURING AND / OR COMPARISONING THE TAPE THICKNESS OF FIBER TAPES.
    US4766647A (en) * 1987-04-10 1988-08-30 Spinlab Partners, Ltd. Apparatus and method for measuring a property of a continuous strand of fibrous materials
    DE9404333U1 (en) * 1993-04-02 1994-08-04 Truetzschler Gmbh & Co Kg Device for measuring the strength of a fiber structure with a tape guide for guiding the fiber tapes at the drafting system inlet
    DE4404326A1 (en) * 1993-04-02 1994-10-06 Truetzschler Gmbh & Co Kg Device for measuring the thickness of a sliver with a sliver guide for guiding the slivers at the drafting device inlet

    Cited By (3)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE10327469B4 (en) * 2002-07-06 2016-03-10 Rieter Ingolstadt Gmbh Sliver cross-section measuring device
    DE10233289A1 (en) * 2002-07-22 2004-02-12 Rieter Ingolstadt Spinnereimaschinenbau Ag Sensor to detect sliver build-up at drawframe is located at exit of the sliver inlet guide to the calender rollers
    DE10233289B4 (en) * 2002-07-22 2015-12-24 Rieter Ingolstadt Gmbh Track as well as bandstop sensor

    Also Published As

    Publication number Publication date
    CN1157909A (en) 1997-08-27
    EP0751243A1 (en) 1997-01-02
    DE59603836D1 (en) 2000-01-13
    US5697247A (en) 1997-12-16
    JPH0913237A (en) 1997-01-14

    Similar Documents

    Publication Publication Date Title
    EP0626472B2 (en) Device for measuring the thickness of a fibre formation with a sliver guide for guiding the slivers at the entry of the drawing frame
    DE102005033180B4 (en) Device for detecting a parameter on a plurality of fiber bands fed to a drafting system of a spinning machine
    DE19528484A1 (en) Device on a line for measuring the thickness of a fiber structure
    EP1454133B1 (en) Use of microwaves in the spinning industry
    EP0078939B1 (en) Bar-like device for detecting the respective level of fluids in containers, channels or the like
    DE102005023992A1 (en) Device on a spinning preparation machine, e.g. Carding, carding, track, combing machine or the like, for determining the mass and / or mass variations of a fiber material, e.g. at least one sliver, non-woven fabric or the like., Of cotton, chemical fibers o. The like.
    EP2390391B1 (en) Spinning preparation machine
    EP0631136B1 (en) Apparatus for measuring the mass or cross-sectional density of fibre bands and use of the apparatus
    EP0751243B1 (en) Device for measuring the thickness and/or evenness of slivers
    DE10204328B4 (en) Method for determining the strip mass of a moving fiber structure and spinning preparation machine for carrying out this method
    CH694055A5 (en) Device at a range of processing a fiber structure of slivers.
    DE3534933A1 (en) DEVICE FOR MEASURING THE QUANTITY OF FIBERS TO BE SUPPLIED TO A TEXTILE MACHINE
    EP3176567A1 (en) Apparatus, machine, procedure and use for checking a cigarette head quality
    DE102008038392A1 (en) Apparatus for or on a spinning preparation machine having a drafting system for drawing stranded fibrous material
    CH693181A5 (en) Device at the output of a track.
    DE19716134C5 (en) Yarn tension sensor
    DE19950901A1 (en) Sliver monitor at a drawing unit has sensors at the sliver passage formed by a keyed and grooved roller pair at the entry to the drawing unit to show deviations in the sliver thickness and other irregularities
    CH692987A5 (en) Device on a spinning preparation machine, in particular a card or draw frame.
    DE4002884C2 (en) Device for extruding pipes with an extrusion press
    DE19909040B4 (en) Device at the exit of a route
    DE1510487C3 (en) Device for equalizing the sliver thickness of fiber slivers
    DE19757527C1 (en) Optical breadth measuring equipment for strip material
    EP0460442A1 (en) Device for measuring the thickness and/or the unevenness of slivers
    DE3722141C2 (en) Device for homogenizing the sliver or nonwoven in a card, card or the like.
    DE19520264C2 (en) Measuring device for detecting the flow rate of a bulk material flow

    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): BE CH DE IT LI

    17P Request for examination filed

    Effective date: 19970702

    GRAG Despatch of communication of intention to grant

    Free format text: ORIGINAL CODE: EPIDOS AGRA

    17Q First examination report despatched

    Effective date: 19990208

    GRAG Despatch of communication of intention to grant

    Free format text: ORIGINAL CODE: EPIDOS AGRA

    GRAH Despatch of communication of intention to grant a patent

    Free format text: ORIGINAL CODE: EPIDOS IGRA

    GRAH Despatch of communication of intention to grant a patent

    Free format text: ORIGINAL CODE: EPIDOS IGRA

    GRAA (expected) grant

    Free format text: ORIGINAL CODE: 0009210

    AK Designated contracting states

    Kind code of ref document: B1

    Designated state(s): BE CH DE IT LI

    REG Reference to a national code

    Ref country code: CH

    Ref legal event code: EP

    REF Corresponds to:

    Ref document number: 59603836

    Country of ref document: DE

    Date of ref document: 20000113

    ITF It: translation for a ep patent filed

    Owner name: FIAMMENGHI - DOMENIGHETTI

    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: 20010528

    Year of fee payment: 6

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

    Ref country code: CH

    Payment date: 20010615

    Year of fee payment: 6

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

    Ref country code: BE

    Payment date: 20010816

    Year of fee payment: 6

    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 NON-PAYMENT OF DUE FEES

    Effective date: 20020630

    Ref country code: CH

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

    Effective date: 20020630

    Ref country code: BE

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

    Effective date: 20020630

    BERE Be: lapsed

    Owner name: *ZELLWEGER LUWA A.G.

    Effective date: 20020630

    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

    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: 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: 20050607