EP2161356B1 - Spinning frame with a pneumatic condensing device - Google Patents

Spinning frame with a pneumatic condensing device Download PDF

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Publication number
EP2161356B1
EP2161356B1 EP20080015531 EP08015531A EP2161356B1 EP 2161356 B1 EP2161356 B1 EP 2161356B1 EP 20080015531 EP20080015531 EP 20080015531 EP 08015531 A EP08015531 A EP 08015531A EP 2161356 B1 EP2161356 B1 EP 2161356B1
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EP
European Patent Office
Prior art keywords
vacuum
suction
return
draught
condensing
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 - Fee Related
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EP20080015531
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German (de)
French (fr)
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EP2161356A1 (en
Inventor
Gabriel Schneider
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Maschinenfabrik Rieter AG
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Maschinenfabrik Rieter AG
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Priority to EP20080015531 priority Critical patent/EP2161356B1/en
Priority to CN200910168979A priority patent/CN101666000A/en
Publication of EP2161356A1 publication Critical patent/EP2161356A1/en
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Publication of EP2161356B1 publication Critical patent/EP2161356B1/en
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    • 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
    • D01H5/70—Constructional features of drafting elements
    • D01H5/72—Fibre-condensing guides
    • 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

Definitions

  • the invention relates to a spinning machine comprising a plurality of spinning stations, each having a drafting device, a pneumatic compacting device and a swirl generating device for at least one fiber strand, wherein a plurality of such devices are arranged side by side in the spinning machine, and the compacting means an evacuated compacting surface for compacting over the compacting surface guided fiber strand and a suction device, via which the suction air flowing through the evacuated compression surface into the suction device is discharged.
  • Spinning machines in particular ring spinning machines, with pneumatic compression devices are known from the prior art.
  • the pneumatic compression device serves the purpose of compressing a stretched fiber structure, wherein edge fibers protruding from the fiber structure by exerting an induced draft are guided towards the fiber structure and the fiber structure is generally compacted. Thanks to the pneumatic compaction process, a fine yarn of low hairiness can be produced.
  • the suction insert is connected to a suction line, via which an induced by a vacuum source induced suction is applied.
  • the compaction effect is achieved by ambient air through the openings in the outer circumference of the screen drum and the suction slot of the underlying suction insert is sucked into the suction line.
  • Object of the present invention is therefore to propose a device by means of which a reduced or absent suction at the compression surface of the compacting device easily detected and can be corrected quickly, so that the quality of the yarn produced is impaired as little as possible.
  • the suction device are associated with negative pressure indicating means for optically displaying a negative pressure or induced draft at the respective spinning station and thereby reduced compression suction power
  • the negative pressure indicating means comprise a display element and return means acting on the display element, wherein the negative pressure the display element exerts a force, and the restoring means exert a negative pressure on the display element, and the negative pressure and the return means cooperate with each other such that when the negative pressure or the induced draft or when a negative pressure threshold or induced draft, the display element changes its shape due to the restoring force of the return means.
  • the display means comprise a shape-changeable body on which a suction or negative pressure is exerted, which causes a change in the shape or the size of the body.
  • the body or parts thereof have a resilience, which counteracts the induced draft or negative pressure, so that when the negative pressure or the induced draft decreases, the shape of the body is continuously or abruptly changed due to the restoring forces acting on the body.
  • the body or parts thereof consists of a flexible material with resilience.
  • the body is dimensionally stable under atmospheric pressure conditions and variable in its form or size when exerting a suction or negative pressure.
  • the flexible material may, for. B. rubber-elastic or elastic properties have, which exert a counter to the negative pressure or the induced draft restoring force on the shape-changeable body.
  • the display means include a variable-shape hollow body which is attached to the suction device, such that in its cavity an induced draft is exerted by means of which the shape or size of the hollow body is changed.
  • the nature of the hollow body is such that when the negative pressure or the induced draft, the shape of the hollow body is changed due to the restoring forces acting on the hollow body.
  • the change in shape is preferably in an expansion, bulging or unfolding of the hollow body walls, ie in an increase in the volume of the body due to the restoring forces acting on the body.
  • the hollow body is preferably dimensionally stable under prevailing atmospheric pressure conditions inside and outside the hollow body.
  • the hollow body is preferably in the form of a cylindrical bellows whose Faltenbalg Vietnamese has a resilience.
  • the bellows folds together reducing its volume.
  • the bellows unfolds under volume increase due to the acting restoring forces in Zylinderachsraum. In this way, a malfunction is visually displayed in the area of the compression area.
  • the hollow body may also be a balloon-shaped body, the shell of which has a resilience, which counteracts the negative pressure or the induced draft, so that upon removal of the negative pressure or the induced draft, the balloon envelope unfolds or bulges outwards.
  • the display element is in the form of a dome-shaped membrane which has a resilience counteracting the negative pressure or the induced draft, so that the membrane is everted when the pressure falls below a limit value for the negative pressure or for the induced draft ,
  • the resilience is justified by an axial bias of the membrane.
  • the membrane has at its triggered by changing the negative pressure or the induced draft change a Umspringtician or Umschlagtician ("mechanical dead center”), in which the membrane jumps from a concave shape into a convex shape.
  • the membrane is designed and arranged on the suction device, that it is formed concave inward when the induced draft from the outside and absent or too low suction convex outwards. While an outside observer scarcely perceives the concave curvature of the membrane, it immediately catches the convexly outwardly convex membrane when the induced draft disappears.
  • the perception can be enhanced by a coloring of the membrane by a striking signal color.
  • the compacting device may include a rotatable compacting drum having a preferably annular cavity and a peripheral surface forming the compacting surface and provided with apertures.
  • the suction device comprises a suction insert with suction opening, which is introduced into the cavity of the compression drum and stored therein stationary.
  • the vacuum indicating means are mounted on the suction insert, wherein the display element is arranged laterally outside the compression drum.
  • the compression device comprises a circumferential, perforated Verdichtungsriemchen whose peripheral surface forms the compression surface.
  • the suction device comprises a stationary mounted suction insert with suction opening, over which the Verdichtungsriemchen is guided.
  • the vacuum indicating means are mounted on the suction insert, wherein the display element is arranged laterally outside the circulation area of the compacting belt.
  • the negative pressure indicating means are preferably arranged in a front end section of the suction insert, viewed in the direction of flow of the fiber structure.
  • the invention further relates to a suction device for a pneumatic compression device of a spinning machine.
  • the suction device comprises negative pressure indicating means for optically displaying a negative pressure or induced draft at the respective spinning station and thereby reduced compression suction power, the negative pressure indicating means including a display element and return means acting on the display element, the negative pressure acting on the display element exerts a force, and the restoring means exert a, the negative pressure opposing force on the display element, and the vacuum and the return means cooperate with each other such that upon decrease of the negative pressure or the induced draft or falls below a threshold value for the vacuum or induced draft, the display element changes its shape due to the restoring force of the return means.
  • the spinning machine may be a ring spinning, funnel spinning, bell spinning or pot spinning machine.
  • FIG. 1a shows a suction device 9 with a suction insert 1 and a subsequent to the suction insert 1 suction line 11 for a pneumatic compression device.
  • the suction insert 1 has a suction slot 2 through which the air extracted from the compression area (not shown) (arrow 6) is removed. The air is fed through the suction insert 1 and the suction line 11 to a suction channel (arrow 7).
  • vacuum indicating means 10 are mounted with a laterally arranged, cylindrical bellows 5.
  • the bellows is connected via connecting means 3, 4 with the suction insert 1.
  • the connecting means 3, 4 comprise an attachment 3, which is applied to the suction insert 1 and connected via a snap connection or adhesive bond thereto.
  • the attachment 3 contains a connection interface 4, to which the bellows 5 is attached to the attachment 3.
  • the attachment 3 is part of the vacuum indicating means 10.
  • the connection interface 4 has a passage from the suction insert 1 to the display means 5 for the suction air 8.
  • an attachment is dispensed with; instead, the attachment 3 and the connection interface 4 for the negative pressure display means 10 are integrated into the suction insert 1.
  • FIG. 1b shows an arrangement according to FIG. 1a , in which, however, no or only a reduced negative pressure or induced draft in the suction insert 1 prevails.
  • the bellows 5 is therefore unfolded due to the force acting on the bellows structure against the induced return force in the axial direction under increasing the volume.
  • FIG. 2 shows the arrangement according to FIG. 1 a and 1 b at the compression device 21 a twin spinning station.
  • the compacting device 21 comprises, per spinning station, a screen drum 26a, 26b mounted on a driven lower cylinder 23.
  • the screen drum 26a, 26b has a rotating jacket surface 90 (see also FIG Fig. 7 ), which form the compression surface 27a, 27b.
  • the lateral surface 90 is provided with openings 28a, 28b, through which the compression surface 27a, 27b is sucked.
  • the suction insert 1 a, 1 b (dashed) is laterally inserted into an annular recess 91 in the screen drum 26 a, 26 b, wherein the lateral surface 90 forms the outer boundary of the annular recess.
  • the suction insert 1 lies with its suction opening 2a, 2b directly under the lateral surface 90th
  • the fiber bundle 29a, 29b to be compacted is conveyed in the fiber flow direction 17 out of the drafting system (not shown) through the nip line formed by the screen drum 26a, 26b and a drafting head top roller 25a, 25b onto the compacting surface 27a, 27b.
  • the fiber bundle 29a, 29b to be compacted is guided onto the compacting surface 27a, 27b, compressed pneumatically and leaves the compacting device 21 via the rotational blocking gap formed by the rotary blocking roller 30a, 30b and the screening drum 26a, 26b in the direction of a swirl-producing member (not shown).
  • the swirl-producing member causes the sliver to turn into a yarn. This happens with ring spinning machines z. Example by means of a ring-traveler system, which cooperates with a rotating spindle.
  • the anti-rotation rollers 30a, 30b and delivery rollers 25a, 25b are supported in a known manner by a guide arm 22, 24 which supports the upper rollers 30a, 30b; 25a, 25b press on the underlying screening drum 26a, 26b.
  • each spinning station output Drehsperrspalt in a known manner a Fadenabsaugrohr 31 a, 31 b assigned.
  • the suction inserts 1 a, 1 b are laterally inserted into the screen drum 26 a, 26 b.
  • the bellows 5 a, 5 b is arranged laterally on the suction insert 1 a, 1 b in the direction of the lateral screen drum opening, so that the bellows 5 a protrudes in the unfolded state laterally of the screen drum 26 a, 26 b.
  • the unfolded state of the bellows 5 a is triggered by the compression device 21 in the case of missing or defective suction power.
  • FIG. 2 which is the compression device 21 in front view, ie from the perspective of the operator, can be seen, a poor suction at the spinning station immediately on the protruding bellows 5a recognizable.
  • the bellows 5b is folded by the suction and therefore optically not or only badly noticeable.
  • FIG. 2 Incidentally, on the embodiments according to the Figures 3 . 4 . 5 and 6 hold true.
  • the embodiments according to the Figures 3 . 4 . 5 and 6 also show negative pressure indicating means 16, 49, 59, 79 with an attachment 13, 43, 53, 73 and corresponding connection interfaces 14, 44, 54, 74.
  • the connection interfaces 14, 44, 54, 74 have passages from the suction insert (not shown) to the indicating element 15, 46, 55, 75 for the suction air 18, 48, 58, 78 on.
  • the embodiment according to the FIGS. 3a, 3b comprises a balloon-shaped display element 15 with a flexible shell, which has a counteracting the induced draft recovery. Thanks to the resilience of the balloon body is in accordance with prevailing ambient pressure in its cavity in its unfolded size FIG. 3b in front. If an induced draft 18 is now created inside the balloon body 15, as happens during the compression process, a negative pressure arising in relation to the ambient pressure in the interior of the cavity causes the balloon wall to bulge inward or fold and the cavity to be reduced (FIG. Fig. 3a ). As soon as the induced draft disappears or is reduced, the balloon envelope folds or bulges due to the restoring forces, increasing the void volume and thus becomes visible to the operating personnel. The resilience is achieved here by flexible and possibly elastic embodiment of the balloon envelope.
  • the balloon body 55, 55a, 55b according to Figure 5a-c arranged in a sleeve-shaped guide body 56 with a recess 57.
  • the induced draft 18 inside the balloon body 55b causes the balloon wall to bulge inward and reduce the cavity (FIG. FIG. 5c ), so that the balloon body 55b is hardly or not visible in the recess.
  • the balloon envelope 55a folds outward and outwardly enlarging the cavity volume and occupies the place in the recess 57 of the sleeve-shaped body 56.
  • FIG. 5b ).
  • the recess 57 and the sleeve body 56 is arranged at the spinning station or on the suction insert that the operator looks at the control of the spinning unit laterally to the recess 57, which then as a U, C or V-shaped recess on the sleeve body 56 is perceptible ( Figure 5b, 5c ).
  • the recess may also be present as a laterally perceptible one-sided or continuous opening in the sleeve body, which is arranged so that the operator looks at them head-on (not shown).
  • the embodiment according to the FIGS. 4a and 4b shows a freely movable in a cylindrical tube 45, spherical roller 46 according to the first embodiment.
  • the cylindrical tube 45 is a closed hollow body, which is connected via a connection interface 44 and a cap 43 to the suction insert (not shown).
  • the cavity of the cylindrical tube 45 and the suction insert are communicatively connected to each other via an air passage.
  • the tube 45 may further have at its free end an air passage 47 to the atmospheric environment.
  • the tube 45 rises from its free end to the connection interface 44, so that the sliding body 46 is inclined to roll down to the free end of the tube 45 due to the force of gravity acting on it.
  • the roller 46 In trouble-free operation, however, the roller 46 is pulled towards the connection interface 44 by the induced against the force of gravity suction 48. However, if the induced draft 48 fails or falls below a certain threshold value, then the rolling element 46 shifts in the direction of the free end of the tube 45 and indicates in this way the presence of a compaction disturbance.
  • the embodiment according to the Figures 6a and 6b shows a display element 75 in the form of a dome-shaped membrane, which is connected via a connection interface 74 and a cap 73 with a suction insert (not shown).
  • the membrane 75 is flexible and separates the evacuated cavity of the absorbent insert from the atmospheric environment.
  • the membrane 75 has a resilience, which makes them bulge outwards in atmospheric conditions on both sides. This resilience counteracts the induced draft 78, which pulls the membrane inwards toward the suction insert. Between these two positions, the membrane has a Umspringddling over which the membrane jumps from one layer to the other. If the induced draft 78 now stops or falls below a certain threshold value, then the membrane jumps outward and bulges accordingly. In this way, the spinning staff is notified of the presence of a compaction disturbance.
  • FIG. 7 shows the screen drum 26a, 26b according to FIG. 2 in a side view.
  • the sieve drum is open to the view side. This corresponds to FIG. 2 the to Loading arm 22, 24 facing side at the spinning station pairing.
  • the vacuum display element 5a, 5b is arranged at this side opening at the lower end portion of the suction insert 1a, 1b and extends in unfolded or expanded state, ie in the presence of a compression disorder laterally outside the screen drum 26a, 26b.
  • the suction line 11 is arranged at the upper end portion of the suction insert 1 a, 1 b.

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

Description

Die Erfindung betrifft eine Spinnmaschine enthaltend eine Mehrzahl von Spinnstellen mit jeweils einem Streckwerk, einer pneumatischen Verdichtungseinrichtung und einer Drallerzeugungseinrichtung für jeweils mindestens einen Faserverband, wobei mehrere solche Einrichtungen nebeneinander in der Spinnmaschine angeordnet sind, und die Verdichtungseinrichtung eine besaugte Verdichtungsfläche zum Verdichten des über die Verdichtungsfläche geführten Faserverbandes und eine Saugeinrichtung enthält, über welche die durch die besaugte Verdichtungsfläche in die Saugeinrichtung strömende Saugluft abgeführt wird.The invention relates to a spinning machine comprising a plurality of spinning stations, each having a drafting device, a pneumatic compacting device and a swirl generating device for at least one fiber strand, wherein a plurality of such devices are arranged side by side in the spinning machine, and the compacting means an evacuated compacting surface for compacting over the compacting surface guided fiber strand and a suction device, via which the suction air flowing through the evacuated compression surface into the suction device is discharged.

Spinnmaschinen, insbesondere Ringspinnmaschinen, mit pneumatischen Verdichtungseinrichtungen sind aus dem Stand der Technik bekannt. Die pneumatische Verdichtungseinrichtung dient dem Zweck des Verdichtens eines verstreckten Faserverbandes, wobei durch Ausüben eines Saugzuges auf den Faserverband abstehende Randfasern zum Faserverband hin geführt werden und der Faserverband ganz allgemein kompaktiert wird. Dank dem pneumatischen Verdichtungsprozess lässt sich ein feines Garn von geringer Haarigkeit herstellen.Spinning machines, in particular ring spinning machines, with pneumatic compression devices are known from the prior art. The pneumatic compression device serves the purpose of compressing a stretched fiber structure, wherein edge fibers protruding from the fiber structure by exerting an induced draft are guided towards the fiber structure and the fiber structure is generally compacted. Thanks to the pneumatic compaction process, a fine yarn of low hairiness can be produced.

Es sind verschiedene Ausführungsformen von pneumatischen Verdichtungseinrichtungen aus dem Stand der Technik bekannt. So wird z. B. in der DE-A-198 19 019 und der DE-A-196 37 828 eine pneumatischen Verdichtungseinrichtung offenbart, die eine Verdichtungstrommel in Ausführung einer Siebtrommel und einen in die Siebtrommel einführbaren Saugeinsatz mit Schlitzöffnung beschreiben. Die Siebtrommel weist eine drehbare und mit Durchbrüchen durchsetzte Umfangsfläche auf, welche die Verdichtungsfläche ausbildet, über die das zu verdichtende Faserband geführt wird. Zur Aufnahme des Saugeinsatzes weist die Siebtrommel einen ringförmigen Hohlraum aus, welcher in Achsrichtung der Trommel zu einer Seite hin offen ist. Durch diese seitliche Öffnung ist der Saugeinsatz eingeschoben und stationär unterhalb der mit Durchbrüchen durchsetzen Umfangsfläche gelagert. Der Saugeinsatz ist an eine Saugleitung angeschlossen, über welche ein von einer Unterdruckquelle erzeugter Saugzug angelegt wird. Die Verdichtungswirkung wird dadurch erreicht, indem Umgebungsluft durch die Durchbrüche im Aussenumfang der Siebtrommel und den Saugschlitz des darunter liegenden Saugeinsatzes in die Saugleitung abgesaugt wird.Various embodiments of prior art pneumatic compression devices are known. So z. B. in the DE-A-198 19 019 and the DE-A-196 37 828 discloses a pneumatic compacting device which describes a compacting drum in the form of a screening drum and a slot-opening suction insert which can be inserted into the screen drum. The sieve drum has a rotatable circumferential surface penetrated with apertures, which forms the compression surface over which the sliver to be compacted is guided. To accommodate the suction insert, the sieve drum has an annular cavity, which is open in the axial direction of the drum to one side. Through this lateral opening of the suction insert is inserted and stored stationary below the breakthroughs enforce peripheral surface. The suction insert is connected to a suction line, via which an induced by a vacuum source induced suction is applied. The compaction effect is achieved by ambient air through the openings in the outer circumference of the screen drum and the suction slot of the underlying suction insert is sucked into the suction line.

Fällt nun die Saugwirkung aus oder wird diese reduziert, so verschlechtert sich entsprechend die Verdichtungswirkung oder bleibt gänzlich aus, wodurch die Haarigkeit des Garnes zunimmt. Es kann nun vorkommen, dass es im Inneren der Saugeinrichtung, insbesondere im Inneren des Saugeinsatzes, zu einer Verstopfung augrund einer Ansammlung von angesaugtem Faserflug und anderem Schmutz kommt. Diese Verstopfung führt zu einer Reduktion oder zu einem Ausbleiben der Saugleistung an der Verdichtungsfläche und somit zu einer Verschlechterung der Garnqualität. Durch die Herausnahme und Reinigung des Saugeinsatzes können solche Verstopfungen relativ schnell und ohne grossen Aufwand beseitigt werden.If the suction now fails or is reduced, the compaction effect correspondingly deteriorates or disappears completely, as a result of which the hairiness of the yarn increases. It may now happen that there is a blockage in the interior of the suction device, in particular in the interior of the suction insert, due to an accumulation of sucked fiber fly and other dirt. This clogging leads to a reduction or to a lack of suction power at the compression surface and thus to a deterioration of the yarn quality. By removing and cleaning the absorbent insert such blockages can be removed relatively quickly and without much effort.

Das Problem liegt jedoch darin, dass eine solche Verstopfung bzw. das Ausbleiben des Saugzuges an der Verdichtungsfläche von Auge kaum erkennbar ist. Die Störung wird erst spät, nämlich bei der Feststellung der schlechten Garnqualität erkannt.The problem, however, is that such a blockage or the absence of the induced draft at the compression surface of the eye is barely recognizable. The disturbance is detected late, namely when determining the poor yarn quality.

Aufgabe vorliegender Erfindung ist es daher, eine Einrichtung vorzuschlagen, mittels welcher eine verminderte oder ausbleibende Saugleistung an der Verdichtungsfläche der Verdichtungseinrichtung leicht erkannt und entsprechend schnell behoben werden kann, so dass die Qualität des produzierten Garnes möglichst wenig beeinträchtigt wird.Object of the present invention is therefore to propose a device by means of which a reduced or absent suction at the compression surface of the compacting device easily detected and can be corrected quickly, so that the quality of the yarn produced is impaired as little as possible.

Die Aufgabe wird dadurch gelöst, dass der Saugeinrichtung Unterdruckanzeigemittel zur optischen Anzeige eines an der betreffenden Spinnstelle ab- oder ausfallenden Unterdruckes bzw. Saugzuges und dadurch verminderten Verdichtungssaugleistung zugeordnet sind, wobei die Unterdruckanzeigemittel ein Anzeigeelement und auf das Anzeigeelement wirkende Rückstellmittel enthalten, wobei der Unterdruck auf das Anzeigeelement eine Kraft ausübt, und die Rückstellmittel eine, dem Unterdruck entgegen gerichtete Kraft auf das Anzeigeelement ausüben, und der Unterdruck und die Rückstellmittel derart miteinander zusammenwirken, dass bei Abnahme des Unterdrucks bzw. des Saugzuges oder bei Unterschreitung eines Schwellenwertes für den Unterdruck bzw. Saugzug, das Anzeigeelement aufgrund der Rückstellkraft der Rückstellmittel seine Form ändert.The object is achieved in that the suction device are associated with negative pressure indicating means for optically displaying a negative pressure or induced draft at the respective spinning station and thereby reduced compression suction power, wherein the negative pressure indicating means comprise a display element and return means acting on the display element, wherein the negative pressure the display element exerts a force, and the restoring means exert a negative pressure on the display element, and the negative pressure and the return means cooperate with each other such that when the negative pressure or the induced draft or when a negative pressure threshold or induced draft, the display element changes its shape due to the restoring force of the return means.

Gemäss einer ersten Ausführungsform der Erfindung beinhalten die Anzeigemittel einen formveränderbaren Körper, auf welchen ein Saugzug bzw. Unterdruck ausgeübt wird, der eine Änderung der Form bzw. der Grösse des Körpers bewirkt. Der Körper oder Teile davon verfügen über ein Rückstellvermögen, welches dem Saugzug bzw. Unterdruck entgegenwirkt, so dass bei Abnahme des Unterdrucks bzw. des Saugzuges die Form des Körpers aufgrund der auf den Körper wirkenden Rückstellkräften kontinuierlich oder sprunghaft verändert wird.According to a first embodiment of the invention, the display means comprise a shape-changeable body on which a suction or negative pressure is exerted, which causes a change in the shape or the size of the body. The body or parts thereof have a resilience, which counteracts the induced draft or negative pressure, so that when the negative pressure or the induced draft decreases, the shape of the body is continuously or abruptly changed due to the restoring forces acting on the body.

Gemäss einer Weiterentwicklung der ersten Ausführungsform besteht der Körper oder Teile davon aus einem flexiblen Material mit Rückstellvermögen. Der Körper ist unter atmosphärischen Druckbedingungen formstabil und bei Ausüben eines Saugzuges bzw. Unterdruck in seiner Form bzw. Grösse veränderbar. Das flexible Material kann z. B. gummielastische oder federelastische Eigenschaften haben, welche eine entgegen des Unterdruckes bzw. des Saugzuges wirkende Rückstellkraft auf den formveränderbaren Körper ausüben.According to a further development of the first embodiment, the body or parts thereof consists of a flexible material with resilience. The body is dimensionally stable under atmospheric pressure conditions and variable in its form or size when exerting a suction or negative pressure. The flexible material may, for. B. rubber-elastic or elastic properties have, which exert a counter to the negative pressure or the induced draft restoring force on the shape-changeable body.

Gemäss einer ersten Variante der ersten Ausführungsform beinhalten die Anzeigemittel einen formveränderbaren Hohlkörper, welcher an die Saugeinrichtung angebracht ist, derart dass in dessen Hohlraum ein Saugzug ausgeübt wird, mittels welchem die Form bzw. Grösse des Hohlkörpers verändert wird. Die Beschaffenheit des Hohlkörpers ist dergestalt, dass bei Abnahme des Unterdrucks bzw. des Saugzuges die Form des Hohlkörpers aufgrund der auf den Hohlkörper wirkenden Rückstellkräften verändert wird. Die Formveränderung liegt bevorzugt in einer Ausdehnung, Auswölbung oder Entfaltung der Hohlkörperwände, d.h. in einer Volumenvergrösserung des Körpers aufgrund der auf den Körper wirkenden Rückstellkräfte. Der Hohlkörper ist bevorzugt formstabil bei herrschenden atmosphärischen Druckbedingungen innerhalb und ausserhalb des Hohlkörpers.According to a first variant of the first embodiment, the display means include a variable-shape hollow body which is attached to the suction device, such that in its cavity an induced draft is exerted by means of which the shape or size of the hollow body is changed. The nature of the hollow body is such that when the negative pressure or the induced draft, the shape of the hollow body is changed due to the restoring forces acting on the hollow body. The change in shape is preferably in an expansion, bulging or unfolding of the hollow body walls, ie in an increase in the volume of the body due to the restoring forces acting on the body. The hollow body is preferably dimensionally stable under prevailing atmospheric pressure conditions inside and outside the hollow body.

Der Hohlkörper liegt bevorzugt in der Form eines zylinderförmigen Faltenbalges vor, dessen Faltenbalgstruktur über ein Rückstellvermögen verfügt. Bei der Anwendung eines bestimmten Unterdruckes bzw. Saugzuges faltet sich der Faltenbalg unter Verkleinerung seines Volumens zusammen. Bei Abnahme des Unterdruckes bzw. des Saugzuges entfaltet sich der Faltenbalg unter Volumenzunahme aufgrund der wirkenden Rückstellkräfte in Zylinderachsrichtung. Auf diese Weise wird optisch eine Funktionsstörung im Bereich der Verdichtungsfläche angezeigt.The hollow body is preferably in the form of a cylindrical bellows whose Faltenbalgstruktur has a resilience. When using a certain negative pressure or induced draft, the bellows folds together reducing its volume. When the negative pressure or the induced draft decreases, the bellows unfolds under volume increase due to the acting restoring forces in Zylinderachsrichtung. In this way, a malfunction is visually displayed in the area of the compression area.

Der Hohlkörper kann auch ein ballonförmiger Körper sein, dessen Hülle über ein Rückstellvermögen verfügt, welches dem Unterdruck bzw. dem Saugzug entgegenwirkt, so dass sich bei Abnahme des Unterdrucks bzw. des Saugzuges die Ballonhülle nach aussen entfaltet bzw. wölbt.The hollow body may also be a balloon-shaped body, the shell of which has a resilience, which counteracts the negative pressure or the induced draft, so that upon removal of the negative pressure or the induced draft, the balloon envelope unfolds or bulges outwards.

Gemäss einer zweiten Variante der ersten Ausführungsform liegt das Anzeigeelement in Form einer kalottenförmigen Membran vor, welche über ein Rückstellvermögen verfügt, das dem Unterdruck bzw. dem Saugzug entgegenwirkt, so dass bei Unterschreiten eines Grenzwertes für den Unterdruck bzw. für den Saugzug die Membran umgestülpt wird. Das Rückstellvermögen wird durch eine axiale Vorspannung der Membran begründet. Die Membran weist dazu bei ihrer durch Veränderung des Unterdruckes bzw. des Saugzuges ausgelösten Formänderung einen Umspringpunkt oder Umschlagpunkt ("mechanischer Totpunkt") auf, bei welchem die Membran sprungartig von einer konkaven Form in eine konvexe Form umspringt. Die Membran ist so beschaffen und an der Saugeinrichtung angeordnet, dass diese bei herrschendem Saugzug von aussen betrachtet konkav nach innen geformt ist und bei fehlendem oder zu geringem Saugzug konvex nach aussen geformt ist. Während ein aussen stehender Betrachter die konkave Einwölbung der Membran kaum wahrnimmt, sticht diesem die konvex nach aussen gewölbte Membran bei Nachlassen des Saugzuges sofort ins Auge. Die Wahrnehmung kann noch mittels einer Einfärbung der Membran durch eine auffällige Signalfarbe verstärkt werden.According to a second variant of the first embodiment, the display element is in the form of a dome-shaped membrane which has a resilience counteracting the negative pressure or the induced draft, so that the membrane is everted when the pressure falls below a limit value for the negative pressure or for the induced draft , The resilience is justified by an axial bias of the membrane. The membrane has at its triggered by changing the negative pressure or the induced draft change a Umspringpunkt or Umschlagpunkt ("mechanical dead center"), in which the membrane jumps from a concave shape into a convex shape. The membrane is designed and arranged on the suction device, that it is formed concave inward when the induced draft from the outside and absent or too low suction convex outwards. While an outside observer scarcely perceives the concave curvature of the membrane, it immediately catches the convexly outwardly convex membrane when the induced draft disappears. The perception can be enhanced by a coloring of the membrane by a striking signal color.

Die Verdichtungseinrichtung kann eine drehbare Verdichtungstrommel mit einem, vorzugsweise ringförmigen, Hohlraum sowie mit einer, die Verdichtungsfläche ausbildende und mit Durchbrüchen versehene Umfangsfläche beinhalten. Die Saugeinrichtung umfasst einen Saugeinsatz mit Saugöffnung, welcher in den Hohlraum der Verdichtungstrommel eingeführt und darin stationär gelagert ist. Die Unterdruckanzeigemittel sind am Saugeinsatz angebracht, wobei das Anzeigeelement seitlich ausserhalb der Verdichtungstrommel angeordnet ist.The compacting device may include a rotatable compacting drum having a preferably annular cavity and a peripheral surface forming the compacting surface and provided with apertures. The suction device comprises a suction insert with suction opening, which is introduced into the cavity of the compression drum and stored therein stationary. The vacuum indicating means are mounted on the suction insert, wherein the display element is arranged laterally outside the compression drum.

Gemäss einer alternativen Ausführung enthält die Verdichtungseinrichtung ein umlaufendes, perforiertes Verdichtungsriemchen, dessen Umfangfläche die Verdichtungsfläche ausbildet. Die Saugeinrichtung umfasst einen stationär gelagerten Saugeinsatz mit Saugöffnung, über welche das Verdichtungsriemchen geführt ist. Die Unterdruckanzeigemittel sind am Saugeinsatz angebracht, wobei das Anzeigeelement seitlich ausserhalb des Umlaufbereichs des Verdichtungsriemchens angeordnet ist.According to an alternative embodiment, the compression device comprises a circumferential, perforated Verdichtungsriemchen whose peripheral surface forms the compression surface. The suction device comprises a stationary mounted suction insert with suction opening, over which the Verdichtungsriemchen is guided. The vacuum indicating means are mounted on the suction insert, wherein the display element is arranged laterally outside the circulation area of the compacting belt.

Die Unterdruckanzeigemittel sind bevorzugt in einem vorderen Endabschnitt des Saugeinsatzes, in Fliessrichtung des Faserverbandes betrachtet, angebracht.The negative pressure indicating means are preferably arranged in a front end section of the suction insert, viewed in the direction of flow of the fiber structure.

Die Erfindung betrifft im weiteren auch eine Saugeinrichtung für eine pneumatische Verdichtungseinrichtung einer Spinnmaschine. Die Erfindung zeichnet sich, dadurch aus, dass die Saugeinrichtung Unterdruckanzeigemittel zur optischen Anzeige eines an der betreffenden Spinnstelle abfallenden Unterdruck bzw. Saugzuges und dadurch verminderten Verdichtungssaugleistung enthält, wobei die Unterdruckanzeigemittel ein Anzeigeelement und auf das Anzeigeelement wirkende Rückstellmittel enthalten, wobei der Unterdruck auf das Anzeigeelement eine Kraft ausübt, und die Rückstellmittel eine, dem Unterdruck entgegen gerichtete Kraft auf das Anzeigeelement ausüben, und der Unterdruck und die Rückstellmittel derart miteinander zusammenwirken, dass bei Abnahme des Unterdrucks bzw. des Saugzuges oder bei Unterschreitung eines Schwellenwertes für den Unterdruck bzw. Saugzug, das Anzeigeelement aufgrund der Rückstellkraft der Rückstellmittel seine Form ändert.The invention further relates to a suction device for a pneumatic compression device of a spinning machine. The invention is characterized in that the suction device comprises negative pressure indicating means for optically displaying a negative pressure or induced draft at the respective spinning station and thereby reduced compression suction power, the negative pressure indicating means including a display element and return means acting on the display element, the negative pressure acting on the display element exerts a force, and the restoring means exert a, the negative pressure opposing force on the display element, and the vacuum and the return means cooperate with each other such that upon decrease of the negative pressure or the induced draft or falls below a threshold value for the vacuum or induced draft, the display element changes its shape due to the restoring force of the return means.

Ferner betrifft die Erfindung auch ein Unterdruckanzeigemittel für die Saugeinrichtung einer pneumatische Verdichtungseinrichtung einer Spinnmaschine zur optischen Anzeige eines an der betreffenden Spinnstelle abfallenden Unterdruck bzw. Saugzuges und dadurch verminderten Verdichtungssaugleistung enthält, wobei die Unterdruckanzeigemittel ein Anzeigeelement und auf das Anzeigeelement wirkende Rückstellmittel enthalten, welche dem Unterdruck bzw. dem Saugzug entgegenwirken, wobei der Unterdruck auf das Anzeigeelement eine Kraft ausübt, und die Rückstellmittel eine, dem Unterdruck entgegen gerichtete Kraft auf das Anzeigeelement ausüben, und der Unterdruck und die Rückstellmittel derart miteinander zusammenwirken, dass bei Abnahme des Unterdrucks bzw. des Saugzuges oder bei Unterschreitung eines Schwellenwertes für den Unterdruck bzw. Saugzug, das Anzeigeelement aufgrund der Rückstellkraft der Rückstellmittel seine Form ändert.Furthermore, the invention also relates to a negative pressure indicating means for the suction device of a pneumatic compression device of a spinning machine for optically displaying a falling at the spinning station vacuum or induced draft and thus reduced Verdichtungssaugleistung, wherein the negative pressure indicating means comprise a display element and acting on the display element return means which the negative pressure counteract the suction, wherein the negative pressure on the display element exerts a force, and the return means exert a, the vacuum counteracting force on the display element, and the negative pressure and the return means cooperate with each other such that upon decrease of the negative pressure or the induced draft or falls below a threshold value for the negative pressure or induced draft, the display element changes its shape due to the restoring force of the return means.

Die Spinnmaschine kann eine Ringspinn-, Trichterspinn, Glockenspinn- oder Topfspinnmaschine sein.The spinning machine may be a ring spinning, funnel spinning, bell spinning or pot spinning machine.

Die Erfindung wird nun nachfolgend anhand von Zeichnungen näher erläutert. Es zeigen:

Fig. 1a-b:
eine perspektivische Ansicht eines Saugeinsatzes mit Unterdruckanzeigemit- tel;
Fig. 2:
eine Frontansicht zweier Verdichtungseinrichtungen an einer Spinnstelle;
Fig. 3a-b:
eine perspektivische Ansicht einer weiteren Ausführungsform von Unter- druckanzeigemitteln;
Fig. 4a-b:
eine perspektivische Ansicht einer weiteren Ausführungsform von Unter- druckanzeigemitteln;
Fig. 5a-c:
eine perspektivische Ansicht einer weiteren Ausführungsform von Unter- druckanzeigemitteln;
Fig. 6a-b:
eine perspektivische Ansicht einer weiteren Ausführungsform von Unter- druckanzeigemitteln;
Fig. 7:
eine Seitenansicht einer zur Ansichtsseite hin offenen Siebstrommel.
The invention will now be explained in more detail with reference to drawings. Show it:
Fig. 1a-b:
a perspective view of a suction insert with Unterdruckanzeigemit- tel;
Fig. 2:
a front view of two compression devices at a spinning station;
3a-b:
a perspective view of another embodiment of vacuum pressure indicating means;
Fig. 4a-b:
a perspective view of another embodiment of vacuum pressure indicating means;
Fig. 5a-c:
a perspective view of another embodiment of vacuum pressure indicating means;
6a-b:
a perspective view of another embodiment of vacuum pressure indicating means;
Fig. 7:
a side view of a screen side open to the screen drum.

Der in den Fig 4a, b dargestellte Gegenstand fällt nicht unter die vorliegenden Ansprüche.The in the Fig. 4a, b The subject matter represented is not covered by the present claims.

Figur 1a zeigt eine Saugeinrichtung 9 mit einem Saugeinsatz 1 und einer an den Saugeinsatz 1 anschliessenden Saugleitung 11 für eine pneumatische Verdichtungseinrichtung. Der Saugeinsatz 1 weist einen Saugschlitz 2 auf, durch welchen die von der Verdichtungsfläche (nicht gezeigt) abgesaugte Luft (Pfeil 6) abgeführt wird. Die Luft wird durch den Saugeinsatz 1 und die Saugleitung 11 einem Absaugkanal zugeführt (Pfeil 7). FIG. 1a shows a suction device 9 with a suction insert 1 and a subsequent to the suction insert 1 suction line 11 for a pneumatic compression device. The suction insert 1 has a suction slot 2 through which the air extracted from the compression area (not shown) (arrow 6) is removed. The air is fed through the suction insert 1 and the suction line 11 to a suction channel (arrow 7).

An einem, in Faserflussrichtung 17 liegenden Endabschnitt des Saugeinsatzes 1 sind Unterdruckanzeigemittel 10 mit einem seitlich angeordneten, zylinderförmigen Faltenbalg 5 angebracht. Der Faltenbalg ist über Verbindungsmittel 3, 4 mit dem Saugeinsatz 1 verbunden. Die Verbindungsmittel 3, 4 umfassen einen Aufsatz 3, welcher auf den Saugeinsatz 1 aufgebracht und über eine Schnappverbindung oder Klebverbindung mit diesem verbunden ist. Der Aufsatz 3 enthält eine Verbindungsschnittstelle 4, an welche der Faltenbalg 5 am Aufsatz 3 angebracht ist. Der Aufsatz 3 ist Teil der Unterdruckanzeigemittel 10. Die Verbindungsschnittstelle 4 weist einen Durchgang vom Saugeinsatz 1 zum Anzeigemittel 5 für die Saugluft 8 auf. Gemäss einer alternativen Lösung (nicht gezeigt) wird auf einen Aufsatz verzichtet, vielmehr sind der Aufsatz 3 und die Verbindungsschnittstelle 4 für die Unterdruckanzeigemittel 10 in den Saugeinsatz 1 integriert.At one, lying in the direction of fiber flow 17 end portion of the suction insert 1 vacuum indicating means 10 are mounted with a laterally arranged, cylindrical bellows 5. The bellows is connected via connecting means 3, 4 with the suction insert 1. The connecting means 3, 4 comprise an attachment 3, which is applied to the suction insert 1 and connected via a snap connection or adhesive bond thereto. The attachment 3 contains a connection interface 4, to which the bellows 5 is attached to the attachment 3. The attachment 3 is part of the vacuum indicating means 10. The connection interface 4 has a passage from the suction insert 1 to the display means 5 for the suction air 8. According to an alternative solution (not shown), an attachment is dispensed with; instead, the attachment 3 and the connection interface 4 for the negative pressure display means 10 are integrated into the suction insert 1.

Die beiden vorgenannten Lösungen betreffend den separaten oder in den Saugeinsatz integrierten Aufsatz 3 bzw. Verbindungsschnittstelle 4 gelten auch für die nachfolgend beschriebenen Ausführungsformen gemäss den Figuren 3, 4, 5 und 6.The two above-mentioned solutions relating to the separate or suction insert integrated attachment 3 or connection interface 4 also apply to the embodiments described below according to the Figures 3 . 4 . 5 and 6 ,

Die Figur 1b zeigt eine Anordnung gemäss Figur 1a, bei welcher jedoch kein oder nur ein reduzierter Unterdruck bzw. Saugzug im Saugeinsatz 1 herrscht. Der Faltenbalg 5 ist deshalb aufgrund der entgegen des Saugzuges auf die Balgstruktur wirkenden Rückstellkraft in axialer Richtung unter Volumenvergrösserung entfaltet.The FIG. 1b shows an arrangement according to FIG. 1a , in which, however, no or only a reduced negative pressure or induced draft in the suction insert 1 prevails. The bellows 5 is therefore unfolded due to the force acting on the bellows structure against the induced return force in the axial direction under increasing the volume.

Dank dem auffälligen Volumenunterschied des Faltenbalges 5, welcher zwischen den Zuständen gemäss Fig. 1 a und 1 b herrscht, ist für das Bedienpersonal eine ausbleibende oder reduzierte Verdichtungsleistung an einer Spinnstelle schnell und eindeutig erkennbar.Thanks to the conspicuous volume difference of the bellows 5, which in accordance with the states Fig. 1 a and 1 b prevails, a lack of or reduced compaction performance at a spinning station is quickly and clearly recognizable to the operator.

Die Figur 2 zeigt die Anordnung gemäss Figur 1 a und 1 b an der Verdichtungseinrichtung 21 einer Zwillingsspinnstelle. Die Verdichtungseinrichtung 21 umfasst pro Spinnstelle eine auf einem angetriebenen Unterzylinder 23 gelagerte Siebtrommel 26a, 26b. Die Siebtrommel 26a, 26b weist eine rotierende Mantelfläche 90 auf (siehe auch Fig. 7), welche die Verdichtungsfläche 27a, 27b ausbilden. Die Mantelfläche 90 ist mit Durchbrüchen 28a, 28b versehen, durch welche die Verdichtungsfläche 27a, 27b besaugt wird. Der Saugeinsatz 1 a, 1 b (gestrichelt) ist in eine ringförmige Ausnehmung 91 in der Siebtrommel 26a, 26b seitlich eingeführt, wobei die Mantelfläche 90 die äussere Begrenzung der ringförmigen Ausnehmung bildet. Der Saugeinsatz 1 liegt mit seiner Saugöffnung 2a, 2b direkt unter der Mantelfläche 90.The FIG. 2 shows the arrangement according to FIG. 1 a and 1 b at the compression device 21 a twin spinning station. The compacting device 21 comprises, per spinning station, a screen drum 26a, 26b mounted on a driven lower cylinder 23. The screen drum 26a, 26b has a rotating jacket surface 90 (see also FIG Fig. 7 ), which form the compression surface 27a, 27b. The lateral surface 90 is provided with openings 28a, 28b, through which the compression surface 27a, 27b is sucked. The suction insert 1 a, 1 b (dashed) is laterally inserted into an annular recess 91 in the screen drum 26 a, 26 b, wherein the lateral surface 90 forms the outer boundary of the annular recess. The suction insert 1 lies with its suction opening 2a, 2b directly under the lateral surface 90th

Der zu verdichtende Faserverband 29a, 29b wird in Faserflussrichtung 17 aus dem Streckwerk (nicht gezeigt) durch die von der Siebtrommel 26a, 26b und einer Streckwerks-Ausgangsoberwalze 25a, 25b gebildete Klemmlinie auf die Verdichtungsfläche 27a, 27b geführt. Der zu verdichtende Faserverband 29a, 29b wird auf die Verdichtungsfläche 27a, 27b geführt, pneumatisch verdichtet und verlässt die Verdichtungseinrichtung 21 über den durch die Drehsperrwalze 30a, 30b und der Siebtrommel 26a, 26b gebildeten Drehsperrspalt in Richtung eines Drallerzeugungsorganes (nicht gezeigt). Das Drallerzeugungsorgan bewirkt die Eindrehung des Faserbandes zu einem Garn. Dies geschieht bei Ringspinnmaschinen z. B. mittels eines Ring-Läufer-Systems, welches mit einer sich drehenden Spindel zusammenwirkt.The fiber bundle 29a, 29b to be compacted is conveyed in the fiber flow direction 17 out of the drafting system (not shown) through the nip line formed by the screen drum 26a, 26b and a drafting head top roller 25a, 25b onto the compacting surface 27a, 27b. The fiber bundle 29a, 29b to be compacted is guided onto the compacting surface 27a, 27b, compressed pneumatically and leaves the compacting device 21 via the rotational blocking gap formed by the rotary blocking roller 30a, 30b and the screening drum 26a, 26b in the direction of a swirl-producing member (not shown). The swirl-producing member causes the sliver to turn into a yarn. This happens with ring spinning machines z. Example by means of a ring-traveler system, which cooperates with a rotating spindle.

Die Drehsperrwalzen 30a, 30b und Lieferwalzen 25a, 25b werden in bekannter Art und Weise von einem Führungsarm 22, 24 gehaltert, welcher die Oberwalzen 30a, 30b; 25a, 25b auf die darunter liegende Siebtrommel 26a, 26b drücken. Im weiteren ist jeder Spinnstelle ausgangs Drehsperrspalt in ebenfalls bekannter Weise ein Fadenabsaugrohr 31 a, 31b zugeordnet.The anti-rotation rollers 30a, 30b and delivery rollers 25a, 25b are supported in a known manner by a guide arm 22, 24 which supports the upper rollers 30a, 30b; 25a, 25b press on the underlying screening drum 26a, 26b. In addition, each spinning station output Drehsperrspalt in a known manner a Fadenabsaugrohr 31 a, 31 b assigned.

Die Saugeinsätze 1 a, 1 b sind seitlich in die Siebtrommel 26a, 26b eingeschoben. Der Faltenbalg 5a, 5b ist seitlich am Saugeinsatz 1 a, 1 b in Richtung der seitlichen Siebtrommelöffnung angeordnet, so dass der Faltenbalg 5a im entfalteten Zustand seitlich der Siebtrommel 26a, 26b vorsteht. Der entfaltete Zustand des Faltenbalges 5a wird bei fehlender oder mangelhafter Saugleistung durch die Verdichtungseinrichtung 21 ausgelöst. Wie auf der Figur 2, welche die Verdichtungseinrichtung 21 in Frontansicht, d.h. aus der Perspektive des Bedienpersonals darstellt, zu sehen ist, ist eine mangelhafte Absaugleistung an der Spinnstelle sofort am vorstehenden Faltenbalg 5a erkennbar. An der benachbarten Spinnstelle, wo die Saugleistung nicht beeinträchtigt ist, ist der Faltenbalg 5b durch die Saugwirkung zusammengefaltet und daher optisch nicht oder nur schlecht wahrnehmbar.The suction inserts 1 a, 1 b are laterally inserted into the screen drum 26 a, 26 b. The bellows 5 a, 5 b is arranged laterally on the suction insert 1 a, 1 b in the direction of the lateral screen drum opening, so that the bellows 5 a protrudes in the unfolded state laterally of the screen drum 26 a, 26 b. The unfolded state of the bellows 5 a is triggered by the compression device 21 in the case of missing or defective suction power. Like on the FIG. 2 , which is the compression device 21 in front view, ie from the perspective of the operator, can be seen, a poor suction at the spinning station immediately on the protruding bellows 5a recognizable. At the adjacent spinning station, where the suction power is not impaired, the bellows 5b is folded by the suction and therefore optically not or only badly noticeable.

Die Anordnung gemäss Figur 2 kann übrigens auch auf die Ausführungsvarianten gemäss den Figuren 3, 4, 5 und 6 zutreffen. Die Ausführungsformen gemäss den Figuren 3, 4, 5 und 6 zeigen ebenfalls Unterdruckanzeigemittel 16, 49, 59, 79 mit einem Aufsatz 13, 43, 53, 73 und entsprechenden Verbindungsschnittstellen 14, 44, 54, 74. Die Verbindungsschnittstellen 14, 44, 54, 74 weisen Durchgänge vom Saugeinsatz (nicht gezeigt) zum Anzeigeelement 15, 46, 55, 75 für die Saugluft 18, 48, 58, 78 auf.The arrangement according to FIG. 2 Incidentally, on the embodiments according to the Figures 3 . 4 . 5 and 6 hold true. The embodiments according to the Figures 3 . 4 . 5 and 6 also show negative pressure indicating means 16, 49, 59, 79 with an attachment 13, 43, 53, 73 and corresponding connection interfaces 14, 44, 54, 74. The connection interfaces 14, 44, 54, 74 have passages from the suction insert (not shown) to the indicating element 15, 46, 55, 75 for the suction air 18, 48, 58, 78 on.

Die Ausführungsvariante gemäss den Figuren 3a, 3b umfasst ein ballonförmiges Anzeigeelement 15 mit einer flexiblen Hülle, welche ein entgegen dem Saugzug wirkendes Rückstellvermögen aufweist. Dank dem Rückstellvermögen liegt der Ballonkörper bei herrschendem Umgebungsdruck in seinem Hohlraum in seiner entfalteten Grösse gemäss Figur 3b vor. Wird nun im Inneren des Ballonkörpers 15 ein Saugzug 18 angelegt, wie dies beim Verdichtungsprozess geschieht, bewirkt nun ein gegenüber dem Umgebungsdruck im Inneren des Hohlraumes entstehender Unterdruck, dass sich die Ballonwand nach innen wölbt bzw. faltet und der Hohlraum verkleinert wird (Fig. 3a). Sobald der Saugzug ausbleibt bzw. verringert wird, faltet bzw. wölbt sich die Ballonhülle aufgrund der Rückstellkräfte unter Vergrösserung des Hohlraumvolumens wieder nach aussen und wird dadurch für das Bedienpersonal sichtbar. Das Rückstellvermögen wird hier durch flexible und ggf. elastische Ausgestaltung der Ballonhülle erreicht.The embodiment according to the FIGS. 3a, 3b comprises a balloon-shaped display element 15 with a flexible shell, which has a counteracting the induced draft recovery. Thanks to the resilience of the balloon body is in accordance with prevailing ambient pressure in its cavity in its unfolded size FIG. 3b in front. If an induced draft 18 is now created inside the balloon body 15, as happens during the compression process, a negative pressure arising in relation to the ambient pressure in the interior of the cavity causes the balloon wall to bulge inward or fold and the cavity to be reduced (FIG. Fig. 3a ). As soon as the induced draft disappears or is reduced, the balloon envelope folds or bulges due to the restoring forces, increasing the void volume and thus becomes visible to the operating personnel. The resilience is achieved here by flexible and possibly elastic embodiment of the balloon envelope.

In einer Weiterentwicklung der Ausführungsvariante nach Figur 3 ist der Ballonkörper 55, 55a, 55b gemäss Figur 5a-c in einem hülsenförmigen Führungskörper 56 mit einer Ausnehmung 57 angeordnet. Der im Inneren des Ballonkörpers 55b angelegte Saugzug 18 bewirkt, dass sich die Ballonwand nach innen wölbt bzw. faltet und der Hohlraum verkleinert wird (Figur 5c), so dass der Ballonkörper 55b in der Ausnehmung kaum oder nicht sichtbar ist. Sobald der Saugzug 18 ausbleibt bzw. verringert wird, faltet bzw. wölbt sich die Ballonhülle 55a aufgrund der Rückstellkraft der Ballonwand unter Vergrösserung des Hohlraumvolumens nach aussen und nimmt den Platz in der Ausnehmung 57 des hülsenförmigen Körpers 56 in Anspruch (Figur 5b). Sobald der Platz in der Ausnehmung 57 durch den Ballonkörper 55a eingenommen ist, wird dieser für das Bedienpersonal gut sichtbar. Die Ausnehmung 57 bzw. der Hülsenkörper 56 ist dabei so an der Spinnstelle bzw. am Saugeinsatz angeordnet, dass das Bedienpersonal bei der Kontrolle der Spinnstelle seitlich an die Ausnehmung 57 blickt, welche dann als U-, C-oder V-förmige Eintiefung am Hülsenkörper 56 wahrnehmbar ist (Figur 5b, 5c). Die Ausnehmung kann jedoch auch als seitlich wahrnehmbare einseitig oder durchgängige Öffnung im Hülsenkörper vorliegen, welche so angeordnet ist, dass das Bedienpersonal frontal auf diese blickt (nicht gezeigt).In a further development of the embodiment according to FIG. 3 is the balloon body 55, 55a, 55b according to Figure 5a-c arranged in a sleeve-shaped guide body 56 with a recess 57. The induced draft 18 inside the balloon body 55b causes the balloon wall to bulge inward and reduce the cavity (FIG. FIG. 5c ), so that the balloon body 55b is hardly or not visible in the recess. As soon as the induced draft 18 fails or is reduced, due to the restoring force of the balloon wall, the balloon envelope 55a folds outward and outwardly enlarging the cavity volume and occupies the place in the recess 57 of the sleeve-shaped body 56. FIG. 5b ). As soon as the space in the recess 57 is occupied by the balloon body 55a, it becomes clearly visible to the operating personnel. The recess 57 and the sleeve body 56 is arranged at the spinning station or on the suction insert that the operator looks at the control of the spinning unit laterally to the recess 57, which then as a U, C or V-shaped recess on the sleeve body 56 is perceptible ( Figure 5b, 5c ). However, the recess may also be present as a laterally perceptible one-sided or continuous opening in the sleeve body, which is arranged so that the operator looks at them head-on (not shown).

Die Ausführungsvariante gemäss den Figuren 4a und 4b zeigt einen in einem zylindrischen Röhrchen 45 frei beweglichen, kugelförmigen Rollkörper 46 gemäss der ersten Ausführungsform. Das zylindrische Röhrchen 45 ist ein geschlossener Hohlkörper, welcher über eine Verbindungsschnittstelle 44 und einen Aufsatz 43 an den Saugeinsatz (nicht gezeigt) angeschlossen ist. Der Hohlraum des zylindrischen Röhrchens 45 und des Saugeinsatzes sind über einen Luftdurchlass miteinander kommunizierend verbunden. Das Röhrchen 45 kann ferner an seinem freien Ende einen Luftdurchlass 47 zur atmosphärischen Umgebung aufweisen. Das Röhrchen 45 steigt von seinem freien Ende zur Verbindungsschnittstelle 44 hin an, so dass der Verschiebekörper 46 aufgrund der auf ihn wirkenden Schwerkraft geneigt ist nach unten zum freien Ende des Röhrchens 45 hin zu rollen. Im störungsfreien Betrieb wird der Rollkörper 46 jedoch durch den entgegen der Schwerkraft wirkenden Saugzug 48 zur Verbindungsschnittstelle 44 hin gezogen. Bleibt der Saugzug 48 jedoch aus oder unterschreitet dieser einen gewissen Schwellenwert, so verschiebt sich der Rollkörper 46 in Richtung freien Ende des Röhrchens 45 und zeigt auf diese Weise das Vorliegen einer Verdichtungsstörung an.The embodiment according to the FIGS. 4a and 4b shows a freely movable in a cylindrical tube 45, spherical roller 46 according to the first embodiment. The cylindrical tube 45 is a closed hollow body, which is connected via a connection interface 44 and a cap 43 to the suction insert (not shown). The cavity of the cylindrical tube 45 and the suction insert are communicatively connected to each other via an air passage. The tube 45 may further have at its free end an air passage 47 to the atmospheric environment. The tube 45 rises from its free end to the connection interface 44, so that the sliding body 46 is inclined to roll down to the free end of the tube 45 due to the force of gravity acting on it. In trouble-free operation, however, the roller 46 is pulled towards the connection interface 44 by the induced against the force of gravity suction 48. However, if the induced draft 48 fails or falls below a certain threshold value, then the rolling element 46 shifts in the direction of the free end of the tube 45 and indicates in this way the presence of a compaction disturbance.

Die Ausführungsvariante gemäss den Figuren 6a und 6b zeigt ein Anzeigeelement 75 in Form einer kalottenförmigen Membran, welche über eine Verbindungsschnittstelle 74 und einen Aufsatz 73 mit einem Saugeinsatz (nicht gezeigt) verbunden ist. Die Membran 75 ist flexibel und trennt den besaugten Hohlraum des Saugeinsatzes von der atmosphärischen Umgebung ab. Die Membran 75 weist ein Rückstellvermögen auf, welches diese bei beidseitigen atmosphärischen Bedingungen nach aussen wölben lässt. Diesem Rückstellvermögen wirkt der Saugzug 78 entgegen, welcher die Membran nach innen zum Saugeinsatz hin zieht. Zwischen diesen beiden Positionen weist die Membran einen Umspringpunkt auf, über welchen die Membran von einer Lage in die andere springt. Bleibt der Saugzug 78 nun aus oder unterschreitet dieser einen gewissen Schwellenwert, so springt die Membran nach aussen und wölbt sich entsprechend. Auf diese Weise wird dem Spinnpersonal das Vorliegen einer Verdichtungsstörung angezeigt.The embodiment according to the Figures 6a and 6b shows a display element 75 in the form of a dome-shaped membrane, which is connected via a connection interface 74 and a cap 73 with a suction insert (not shown). The membrane 75 is flexible and separates the evacuated cavity of the absorbent insert from the atmospheric environment. The membrane 75 has a resilience, which makes them bulge outwards in atmospheric conditions on both sides. This resilience counteracts the induced draft 78, which pulls the membrane inwards toward the suction insert. Between these two positions, the membrane has a Umspringpunkt over which the membrane jumps from one layer to the other. If the induced draft 78 now stops or falls below a certain threshold value, then the membrane jumps outward and bulges accordingly. In this way, the spinning staff is notified of the presence of a compaction disturbance.

Die Figur 7 zeigt die Siebtrommel 26a, 26b gemäss Figur 2 in einer Seitenansicht. Die Siebtrommel ist zur Ansichtsseite hin offen. Dies entspricht gemäss Figur 2 der zum Belastungsarm 22, 24 weisenden Seite an der Spinnstellenpaarung. Das Unterdruckanzeigeelement 5a, 5b ist zu dieser seitlichen Öffnung hin am unteren Endabschnitt des Saugeinsatzes 1a, 1 b angeordnet und erstreckt sich in entfaltetem bzw. expandiertem Zustand, d.h. bei Vorliegen einer Verdichtungsstörung seitlich ausserhalb der Siebtrommel 26a, 26b. Am oberen Endabschnitt des Saugeinsatzes 1 a, 1 b ist die Saugleitung 11 angeordnet.The FIG. 7 shows the screen drum 26a, 26b according to FIG. 2 in a side view. The sieve drum is open to the view side. This corresponds to FIG. 2 the to Loading arm 22, 24 facing side at the spinning station pairing. The vacuum display element 5a, 5b is arranged at this side opening at the lower end portion of the suction insert 1a, 1b and extends in unfolded or expanded state, ie in the presence of a compression disorder laterally outside the screen drum 26a, 26b. At the upper end portion of the suction insert 1 a, 1 b, the suction line 11 is arranged.

Claims (11)

  1. Spinning machine containing a plurality of spinning stations, each with a drafting arrangement, with a pneumatic condensing device (21) and with a twist-generating device for at least one fiber strand (29a, 29b) in each case, a plurality of such devices being arranged next to one another In the spinning machine, and the condensing device (21) containing a suction-subjected condensing surface (27a, 27b) for condensing the fiber strand (29a, 29b) guided via the condensing surface (27a, 27b), and a suction device (9) via which the suction air flowing through the suction-subjected condensing surface (27a, 27b) into the suction device is discharged, whereby
    characterized in that
    the suction device (9) is assigned vacuum indicator means (10, 16, 49, 59, 79) for the visual indication of a vacuum or suction draught (8, 18, 48, 58, 78) failing or ceasing at the respective spinning station and of thereby reduced condensing suction power, the vacuum indicator means (10, 16, 49, 59, 79) containing an indicator element (5, 15, 46, 55, 75) and return means acting on the indicator element, the vacuum exerting a force on the indicator element (5,15, 46, 55, 75), and the return means exerting a force directed counter to the vacuum on the indicator element (5, 15, 46, 55, 75), and the vacuum and return means cooperating with one another in such a way that, if the vacuum or the suction draught decreases or a threshold value for the vacuum or suction draught is undershot, the indicator element (5, 15, 46, 55, 75) changes its form on account of the return force of the return means.
  2. Spinning machine according to Claim 1, the indicator means containing a body (5, 15, 55, 75) of variable form, on which can be exerted a suction draught or vacuum, by means of which the form of the body (5, 15, 55, 75) can be varied, and the body (5, 15, 55, 75) or parts thereof having a return capacity which counteracts the suction draught or vacuum, so that, if the vacuum or suction draught (8, 18, 58, 78) decreases, the form of the body (5, 15, 55, 75) can be varied continuously or abruptly on account of the return forces acting on the body.
  3. Spinning machine according to Claim 2, the body (5, 15, 55, 75) or parts thereof consisting of flexible material with a return capacity, and the body (5, 15, 55, 75) being dimensionally stable under atmospheric pressure conditions and being of variable form when a suction draught or vacuum is exerted.
  4. Spinning machine according to either one of Claims 2 or 3, the indicator means containing a hollow body (5, 15, 55) of variable form, in the cavity of which can be exerted a suction draught, by means of which the form of the hollow body (5, 15, 55) can be varied, and the nature of the hollow body (5, 15, 55) being such that, if the vacuum or suction draught decreases, the form of the hollow body (5, 15, 55) can be varied on account of the return forces acting on the hollow body (5, 15, 55).
  5. Spinning machine according to Claim 4, the hollow body (5) being in the form of a cylindrical concertina with a return capacity which counteracts the vacuum or suction draught, so that, if the vacuum or suction draught decreases, the concertina (5) can be unfolded in the axial direction of the cylinder.
  6. Spinning machine according to Claim 4, the hollow body (15) being a balloon-shaped body, which has a return capacity which counteracts the vacuum or suction draught so that, if the vacuum or suction draught decreases, the balloon envelope can be curved outwards.
  7. Spinning machine according to either one of Claims 2 or 3, the indicator element (75) being in the form of a cap-shaped diaphragm which has a return capacity which counteracts the vacuum or suction draught, so that, if a threshold value for the vacuum or suction draught is undershot, the diaphragm (75) can be overturned.
  8. Spinning machine according to one of Claims 1 to 7, the condensing device (21) containing a rotatable condensing drum (26a, 26b) with a cavity and with a circumferential surface forming the condensing surface (27a, 27b) and provided with perforations (28a, 28b), and the suction device (9) containing a suction insert (1) with a suction orifice (2), which suction insert is introduced into the cavity of the condensing drum (26a, 26b) and is mounted stationarily therein, and the vacuum indicator means (10) being attached to the suction insert (1), the indicator element (5) being arranged laterally outside the condensing drum (26a, 26b).
  9. Spinning machine according to Claim 8, the vacuum indicator means (10) being attached in a front end portion of the suction insert (1), as seen in the flow direction (17) of the sliver (29a, 29b).
  10. Suction device (9) for a pneumatic condensing device (21) of a spinning machine, characterized in that the suction device contains vacuum indicator means (10, 16, 49, 59, 79) for the visual indication of a vacuum or suction draught (8, 18, 48, 58, 78) failing at the respective spinning station and of thereby reduced condensing suction power, the vacuum indicator means (10, 16, 49, 59, 79) containing an indicator element (5, 15, 46, 55, 75) and return means acting on the indicator element, the vacuum exerting a force on the indicator element (5, 15, 46, 55, 75), and the return means exerting a force directed counter to the vacuum on the indicator element (5, 15, 46, 55, 75), and the vacuum and the return means cooperating with one another in such a way that, if the vacuum or suction draft decreases or a threshold value for the vacuum or suction draught is undershot, the indicator element (5, 15, 46, 55, 75) changes its form on account of the return force of the return means.
  11. Vacuum indicator means (10, 16, 49, 59, 79) for the suction device (9) of a pneumatic condensing device (21) of a spinning machine for the visual indication of a vacuum or suction draught (8, 18, 48, 58, 78) failing at the respective spinning station and of thereby reduced condensing suction power, the vacuum indicator means (10, 16, 49, 59, 79) containing an indicator element (5, 15, 46, 55, 75) and return means acting on the indicator element and counteract the vacuum or suction draught (8, 18, 48, 58, 78), the vacuum exerting a force on the indicator element (5, 15, 46, 55, 75), and the return means exerting a force directed counter to the vacuum on the indicator element (5, 15, 46, 55, 75), and the vacuum and return means cooperating with one another in such a way that, if the vacuum or suction draught decreases or a threshold value for the vacuum or suction draught is undershot, the indicator element (5, 15, 46, 55, 75) changes its form on account of the return force of the return means.
EP20080015531 2008-09-03 2008-09-03 Spinning frame with a pneumatic condensing device Expired - Fee Related EP2161356B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP20080015531 EP2161356B1 (en) 2008-09-03 2008-09-03 Spinning frame with a pneumatic condensing device
CN200910168979A CN101666000A (en) 2008-09-03 2009-09-03 Spinning frame with a pneumatic condensing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20080015531 EP2161356B1 (en) 2008-09-03 2008-09-03 Spinning frame with a pneumatic condensing device

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EP2161356A1 EP2161356A1 (en) 2010-03-10
EP2161356B1 true EP2161356B1 (en) 2012-10-31

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CH703469A2 (en) 2010-07-15 2012-01-31 Rieter Ag Maschf Monitoring device on a spinning machine.
CH706258A2 (en) 2012-03-21 2013-09-30 Rieter Ag Maschf Supporting element for a compression device.
CH706546A1 (en) * 2012-05-21 2013-11-29 Rieter Ag Maschf Fastening means for a compression module on a spinning machine.
CH714446A1 (en) * 2017-12-15 2019-06-28 Rieter Ag Maschf Suction pipe for a compacting device of a spinning machine.
DE102019113796A1 (en) * 2019-05-23 2020-11-26 Saurer Spinning Solutions Gmbh & Co. Kg Compaction device for a spinning machine, drafting system with the compaction device and method for operating the compaction device
CN113604917B (en) * 2021-09-04 2022-03-04 江苏纳斯卡新材料科技有限公司 Twisting mechanism for spinning machine
CH719132A1 (en) * 2021-11-10 2023-05-15 Rieter Ag Maschf Compression device on a spinning machine with a display element.

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DE19856121C2 (en) * 1998-12-04 2003-12-18 Zinser Textilmaschinen Gmbh Method and device for the production of compacted yarn
DE10022428A1 (en) * 2000-05-09 2001-11-15 Stahlecker Fritz Spinning machine sliver condensing zones has a connecting channel to each suction slit from the common suction channel with a transparent branch control tube and a floating indicator to display sufficient/insufficient suction levels
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DE102020111616A1 (en) 2020-04-29 2021-11-04 Miele & Cie. Kg Method for controlling the circulation pump of a washing machine or washer dryer

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EP2161356A1 (en) 2010-03-10

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