EP0645098A1 - Device for removing the excess of tobacco from a tobacco rod - Google Patents

Device for removing the excess of tobacco from a tobacco rod Download PDF

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Publication number
EP0645098A1
EP0645098A1 EP94114573A EP94114573A EP0645098A1 EP 0645098 A1 EP0645098 A1 EP 0645098A1 EP 94114573 A EP94114573 A EP 94114573A EP 94114573 A EP94114573 A EP 94114573A EP 0645098 A1 EP0645098 A1 EP 0645098A1
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EP
European Patent Office
Prior art keywords
tobacco
rod
excess
strand
circular knife
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP94114573A
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German (de)
French (fr)
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EP0645098B1 (en
Inventor
Uwe Heitmann
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.)
Koerber Technologies GmbH
Original Assignee
Hauni Maschinenbau GmbH
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Filing date
Publication date
Application filed by Hauni Maschinenbau GmbH filed Critical Hauni Maschinenbau GmbH
Publication of EP0645098A1 publication Critical patent/EP0645098A1/en
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Classifications

    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24C—MACHINES FOR MAKING CIGARS OR CIGARETTES
    • A24C5/00—Making cigarettes; Making tipping materials for, or attaching filters or mouthpieces to, cigars or cigarettes
    • A24C5/14—Machines of the continuous-rod type
    • A24C5/18—Forming the rod
    • A24C5/1842—Trimming devices
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24C—MACHINES FOR MAKING CIGARS OR CIGARETTES
    • A24C5/00—Making cigarettes; Making tipping materials for, or attaching filters or mouthpieces to, cigars or cigarettes
    • A24C5/14—Machines of the continuous-rod type
    • A24C5/18—Forming the rod
    • A24C5/1814—Forming the rod containing parts of different densities, e.g. dense ends

Definitions

  • the invention relates to a device in a cigarette rod machine for removing excess tobacco from a tobacco rod moved in a tobacco duct on a suction line conveyor according to the preamble of claim 1.
  • smokable articles especially cigarettes, tobacco fibers, tobacco substitutes or mixtures of both, which are usually fed loose in a tobacco shower, are first turned into a longitudinally axially moving endless tobacco rod on a rotating suction line conveyor, for example in the form of an air-permeable fabric belt educated. After the excess has been removed, this tobacco rod is placed on a wrapping material strip and wrapped in it. The cigarette rod thus formed is cut into single or multiple cigarettes, which are then processed further. In this way, rod-shaped smoking articles such as cigarettes, cigarillos, cigars and the like can be produced from tobacco or tobacco substitutes.
  • the tobacco rod is compressed to form a so-called head reinforcement in the sections which later form the open head ends after the cigarettes have been cut and finished.
  • the invention has for its object to further improve a removal device of the type specified.
  • this object is achieved according to the invention in such a device.
  • a gentle tobacco removal from the fiber strand is ensured because the excess tobacco is cut off from the fiber strand and is not subjected to any additional mechanical stress from paddles or similar impact agents when removed from the removal area.
  • Claim 2 contains features of the arrangement of the circular knife, which enable gentle further promotion of the tobacco after cutting. With the features of claims 3 to 7, the prerequisite is created for the tobacco particles removed from the strand to be transported away in preferred directions without being exposed to destructive mechanical loads.
  • Features of a further improvement of the removal device proposed according to the invention, which also enable the production of compressed sections in the tobacco rod, are contained in claims 8 and 9. Since the holding disks cannot have pockets for the formation of head reinforcements in the tobacco rod due to the circular knife, the compression of the rod required for the head reinforcements of the cigarettes is produced by means of the rotating eccentric.
  • Claim 9 specifies a particularly advantageous arrangement of the eccentrics for the tobacco rod compression. This is selected according to the invention so that the compressed sections in the tobacco rod cannot expand again until the excess is removed.
  • the features of claim 10 are provided to ensure that the tobacco rod is compressed as uniformly as possible.
  • Claims 11 and 12 relate to preferred designs of the deflector element.
  • the invention offers the advantage that the excess can be removed very gently from a tobacco rod in a cigarette rod making machine, so that the removed excess tobacco can be returned to the rod structure without additional loss of quality. At the same time, the excess tobacco removed is directed in a certain direction and can be used without loss.
  • the compression of the tobacco rod required for the head reinforcement of the cigarettes are generated very evenly and are designed so that they do not require any additional deformation work when wrapping the tobacco rod with a cigarette paper. Because of the compact design of the take-off device according to the invention, the compression generated in the strand is optimally retained until the excess is taken off. Overall, the removal device according to the invention ensures the production of a tobacco rod of high quality and uniformity with little technical effort.
  • FIG. 1 shows an embodiment of a device according to the invention in a schematic side view.
  • 1 designates a suction line conveyor of a cigarette rod machine, which is otherwise not shown.
  • An air-permeable tobacco belt 2 is provided as the suction line conveyor, e.g. a perforated band or an air-permeable fabric band which runs around a front and a rear deflection roller 3a or 3b and around guide rollers 4.
  • the lower run 2a of the tobacco band 2 is guided in a tobacco channel 6 over spaced support rollers 7 and in this way forms an air-permeable channel floor.
  • the tobacco channel 6 runs in a straight line in a guide body 8 with parallel side cheeks 8a and 8b (cf. FIG. 3).
  • the tobacco band 2 guided in the tobacco channel 6 is assigned a vacuum chamber 9 on the back, which is connected to a vacuum source 11 and causes a suction draft through the air-permeable tobacco band 2.
  • the tobacco band 2 runs in the direction of an arrow 12.
  • an excess removal device 17 Arranged downstream of the line build-up zone Z is an excess removal device 17 which takes off excess tobacco from the tobacco rod 16.
  • the discharge end 18 of the tobacco band 2 or the tobacco channel 6 lies above the paper inlet of a format device 19, in which the tobacco rod is encased with a wrapping material strip, for example a cigarette paper strip 21, which is fed in the direction of the arrow 21a.
  • a circulating format belt 22 promotes the cigarette paper strip 21 and the tobacco rod 16 placed thereon under an entry finger 23 into the format 19 in which the cigarette paper strip 21 is closed longitudinally around the tobacco rod.
  • the removal device 17 is described in more detail with simultaneous reference to FIGS. 1 to 3. It has retaining disks 26a and 26b which run around parallel axes 24a and 24b. The direction of movement of the strand is indicated by arrow 27 and the direction of rotation of the holding disks by arrows 28a and 28b.
  • the holding disks 26a and 26b run in a common plane, the distance of which from the suction line conveyor 2 is just the same as the desired line height of the finished line.
  • the holding disks touch on their circumference just in the middle of the tobacco rod 16 and separate the excess tobacco from the tobacco rod.
  • a circular knife 32 rotating in the direction of arrow 29 about a knife axis 31 is provided to remove the excess tobacco in the contact zone of the rotating holding disks.
  • the circumferential plane of the circular knife 32 is approximately parallel to the plane of the holding disks 26a and 26b and touches them in the contact zone 33 of the holding disks or runs closely above them, so that the tobacco held between the holding disks is sheared off.
  • a small clearance angle can be provided between the plane of the revolving circular knife 32 and the surface plane of the holding disks 26 by inclining the knife axis 31 to the axes 24 of the holding disks in order to keep the wear on the knife as low as possible.
  • a deflector element 34 is assigned to the circular knife 32, which is designed as a rotating body 36 concentrically rotating around the knife axis with an axially extending peripheral surface 37 acting as a deflector surface.
  • This deflector surface 37 of the rotating body can run in the shape of a truncated cone, as shown in FIGS. 1 and 2. It can also have a concave groove, which is not shown.
  • This deflector element 34 which rotates in synchronism with the circular knife 32, has the effect that the excess tobacco 38 separated from the strand is deflected in a certain preferred direction without mechanical impact stresses as in the known paddle wheels being required. The cut and distracted excess tobacco 38 therefore essentially maintains its consistency and only marginally loses quality due to the cutting itself.
  • the circular knife 32 can be attached to the end of the deflector element 34, as shown in FIG. 1. This circular knife can then be replaced separately. As shown in FIG. 3, a cutting edge 39 can also serve as the circular knife 32, which is formed on the circumference of the end face of the deflector body 36. This cutting edge 39 and also the separate circular knife 32 can consist of a hard, wear-resistant material. Long service lives of the take-off device are thus achieved.
  • the tobacco rod 16 formed in the stand construction zone Z has an irregular surface with elevations and depressions.
  • a removal means 41 in the form of a paddle wheel 43 rotating in the direction of arrow 42 is provided.
  • the axis of the paddle wheel 43 is set at an angle to the strand direction, so that the rotating paddle wheel removes the elevations from the strand surface to the side, as indicated in FIG. 1.
  • the paddle wheel is adjusted to the surface of the strand so that the tobacco rod which is evened out with it still contains a considerable excess amount of tobacco.
  • a compression means 44 in the form of a cam wheel 47 rotating in the direction of arrow 46 with compression cams 48 evenly distributed over its circumference.
  • the compression cams 48 compress successive strand sections perpendicular to the plane of the strand conveyor and compress the tobacco contained in these sections 49 in a defined manner.
  • the tobacco rod 16 which is exfoliated in the strand building zone Z, is first equalized with the paddle wheel 43 by reducing the elevations present on the surface of the rod, in order to create defined strand relationships.
  • the fiber strand thus defined is compressed with the cams 48 of the cam wheel 47 at regular intervals, so that strand sections 49 of higher tobacco density are produced.
  • the cam wheel 47 is laid so far in the inlet gusset 51 of the rotating holding disks 26 that the compressed sections 49 of the strand can no longer expand significantly until the excess is removed.
  • the indication of a compacted strand section 49a indicates the position in which the currently active cam 48a (see FIG. 1) is at the moment of the action on the tobacco rod.
  • This tobacco rod 16 provided with compressed sections 49, which still contains a considerable amount of excess tobacco, runs under the holding disks 26a and 26b, the excess being pinched between the holding disks and cut off by the rotating circular knife 32.
  • the cut tobacco fibers are deflected by the deflector surface 37 of the deflector body 36 in a certain predetermined direction, which is denoted by 38 in FIGS. 2 and 3, so that they can reach a collecting conveyor, which they can enter Promotes the production process.
  • the tobacco rod 16 freed from excess tobacco is placed on the cigarette paper strip 21 and moved with the format belt 22 into the format device 19, where the cigarette paper strip 21 is placed around the tobacco rod and closed in a known manner.
  • Single or multiple cigarettes with head reinforcements at their ends are separated from the resulting wrapped cigarette rod by cuts through the compressed rod segments 49.

Abstract

A device is described for removing the excessive tobacco (38), in a cigarette rod machine, from a tobacco rod (16) moving in a tobacco channel (6) on a suction rod conveyor (2). This device has two supporting disks (26a, b) revolving in opposite directions and touching each other at their circumference, and a removal means (32, 34) assigned to the touching zone of the supporting disks. The removal means is designed as a circular knife (32) whose axis (31) extends substantially parallel to the axes (24) of the supporting disks (26). Assigned to the circular knife (32) is a deflector member (34) whose circumferential surface deflects the excess tobacco (38) removed from the rod in a predetermined direction. This device has the advantage that the excessive tobacco is removed from the rod without the action of a mechanical impact and is directed very gently in a particular direction. <IMAGE>

Description

Die Erfindung betrifft eine Vorrichtung in einer Zigarettenstrangmaschine zum Abnehmen von überschüssigem Tabak von einem an einem Saugstrangförderer in einem Tabakkanal bewegten Tabakstrang gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a device in a cigarette rod machine for removing excess tobacco from a tobacco rod moved in a tobacco duct on a suction line conveyor according to the preamble of claim 1.

Bei der Herstellung von rauchbaren Artikeln, insbesondere von Zigaretten, wird zunächst aus Tabakfasern, aus Tabakersatzstoffen oder aus Mischungen von beiden, die gewöhnlich lose in einem Tabakschauer zugeführt werden, auf einem umlaufenden Saugstrangförderer, beispielsweise in Gestalt eines luftdurchlässigen Gewebebandes, ein längsaxial bewegter endloser Tabakstrang gebildet. Dieser Tabakstrang wird nach der Abnahme von Überschuß auf einen Hüllmaterialstreifen abgelegt und in diesen eingehüllt. Der so gebildete Zigarettenstrang wird in Einzel- oder Mehrfachzigaretten zerschnitten, die dann weiter verarbeitet werden. Auf diese Weise können stabförmige Rauchartikel wie Zigaretten, Zigarillos, Zigarren und dergl. aus Tabak oder Tabakersatzstoffen hergestellt werden. Um zu verhindern, daß aus den offenen Enden der vom Zigarettenstrang abgetrennten Zigaretten Tabak herausfällt, wird der Tabakstrang für die Bildung einer sogenannten Kopfverstärkung in den Abschnitten, die später nach dem Schnitt und der Fertigstellung der Zigaretten die offenen Kopfenden bilden, verdichtet.In the manufacture of smokable articles, especially cigarettes, tobacco fibers, tobacco substitutes or mixtures of both, which are usually fed loose in a tobacco shower, are first turned into a longitudinally axially moving endless tobacco rod on a rotating suction line conveyor, for example in the form of an air-permeable fabric belt educated. After the excess has been removed, this tobacco rod is placed on a wrapping material strip and wrapped in it. The cigarette rod thus formed is cut into single or multiple cigarettes, which are then processed further. In this way, rod-shaped smoking articles such as cigarettes, cigarillos, cigars and the like can be produced from tobacco or tobacco substitutes. In order to prevent tobacco from falling out of the open ends of the cigarettes separated from the cigarette rod, the tobacco rod is compressed to form a so-called head reinforcement in the sections which later form the open head ends after the cigarettes have been cut and finished.

Es ist bekannt, für die Überschußabnahme rotierende Trimmerscheiben einzusetzen, die einen der Überschußmenge entsprechenden Anteil der im Tabakstrang enthaltenen Fasern zwischen sich erfassen, so daß der auf diese Weise vom Nutzstrang separierte Überschuß mittels eines Abnahmemittels beispielsweise in Gestalt eines Paddelrades abgenommen und zur Seite hin entfernt werden kann. Eine solche Vorrichtung ist aus der DE-C2 28 32 638 bekannt. Anstelle von Paddeln können zum Abnehmen und Entfernen des Tabaks von der Berührungszone der umlaufenden Trimmerscheiben fräserartige Schneiden an dem Abnehmerrad vorgesehen sein, die ähnlich wirken wie die Paddeln des Paddelrades. Dies ist beispielsweise aus der DE-A1 29 49 494 bekannt. Bei beiden bekannten Vorrichtungen ist von Nachteil, daß der Tabak von den Paddeln bzw. den Schneiden der schnelllaufenden Abnehmerräder in der Berührungszone der Trimmerscheiben abgerissen und zur Seite hin ausgeschlagen wird, was zu einer erheblichen Tabakzerstörung führt. Dadurch wird die Tabakqualität beträchtlich verringert, was nach der Rückführung des abgenommenen Überschußtabaks in die Strangaufbauzone zu Qualitätsmängeln des Tabakstrangs führen kann.It is known to use rotating trimmer disks for the excess decrease, which record a proportion of the proportion of the fibers contained in the tobacco rod between them, so that the excess separated in this way from the useful strand is removed by means of a decrease means, for example in the form of a paddle wheel, and removed to the side can be. Such a device is from DE-C2 28 32 638 known. Instead of paddles, to remove and remove the tobacco from the contact zone of the circumferential trimmer disks, cutter-like cutting edges can be provided on the take-off wheel, which act similarly to the paddles of the paddle wheel. This is known for example from DE-A1 29 49 494. In both known devices, it is disadvantageous that the tobacco is torn off the paddles or the cutting edges of the high-speed pickup wheels in the contact zone of the trimmer disks and knocked out to the side, which leads to considerable tobacco destruction. This considerably reduces the tobacco quality, which can lead to poor quality of the tobacco rod after the excess tobacco that has been removed is returned to the strand building zone.

Der Erfindung liegt die Aufgabe zugrunde, eine Abnahmevorrichtung der eingangs angegebenen Art weiter zu verbessern.The invention has for its object to further improve a removal device of the type specified.

Mit den im Kennzeichen des Anspruchs 1 angegebenen Merkmalen wird diese Aufgabe bei einer solchen Vorrichtung erfindungsgemäß gelöst. Dabei ist eine schonende Tabakabnahme vom Faserstrang gewährleistet, weil der Überschußtabak vom Faserstrang abgeschnitten und beim Entfernen aus dem Abnahmebereich keinerlei zusätzlicher mechanischer Belastung durch Paddel oder dergleichen Schlagmittel ausgesetzt wird.With the features specified in the characterizing part of claim 1, this object is achieved according to the invention in such a device. A gentle tobacco removal from the fiber strand is ensured because the excess tobacco is cut off from the fiber strand and is not subjected to any additional mechanical stress from paddles or similar impact agents when removed from the removal area.

Weiterbildungen und vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen angegeben.Further developments and advantageous refinements of the invention are specified in the subclaims.

Anspruch 2 enthält Merkmale der Anordnung des Kreismessers, welche eine schonende Weiterförderung des Tabaks nach dem Abschneiden ermöglichen. Mit den Merkmalen der Ansprüche 3 bis 7 wird die Voraussetzung dafür geschaffen, daß die vom Strang abgenommenen Tabakteilchen in bevorzugte Richtungen abtransportiert werden, ohne daß sie zerstörerischen mechanischen Belastungen ausgesetzt werden. Merkmale einer weiteren Verbesserung der erfindungsgemäß vorgeschlagenen Abnahmevorrichtung, die auch die Erzeugung von verdichteten Abschnitten im Tabakstrang ermöglichen, sind in den Ansprüchen 8 und 9 enthalten. Da die Haltescheiben wegen des umlaufenden Kreismessers keine Taschen für die Bildung von Kopfverstärkungen im Tabakstrang aufweisen können, werden gemäß der Erfindung die für die Kopfverstärkungen der Zigaretten erforderlichen Verdichtungen des Strangs mittels des umlaufenden Exzenters erzeugt. Dies hat den Vorteil daß bei der späteren Umhüllung des Tabakstrangs mit Zigarettenpapier keine zusätzliche Verformungsarbeit geleistet werden muß, wie das bei der Verwendung von Trimmerscheiben mit Taschen erforderlich ist, die einen Tabakstrang unregelmäßiger Höhe erzeugen, weil der Überschuß mit den Taschenrädern in unregelmäßigem Abstand vom Saugstrangförderer abgetrennt wird. Anspruch 9 gibt eine besonders vorteilhafte Anordnung der Exzenter für die Tabakstrangverdichtung an. Diese ist nach der Erfindung so gewählt, daß sich die verdichteten Abschnitte im Tabakstrang bis zum Abnehmen des Überschusses nicht wieder aufweiten können. Um möglichst gleichmäßige Verdichtungen im Tabakstrang zu gewährleisten, sind die Merkmale des Anspruchs 10 vorgesehen. Die Ansprüche 11 und 12 betreffen bevorzugte Ausbildungen des Abweiserelements.Claim 2 contains features of the arrangement of the circular knife, which enable gentle further promotion of the tobacco after cutting. With the features of claims 3 to 7, the prerequisite is created for the tobacco particles removed from the strand to be transported away in preferred directions without being exposed to destructive mechanical loads. Features of a further improvement of the removal device proposed according to the invention, which also enable the production of compressed sections in the tobacco rod, are contained in claims 8 and 9. Since the holding disks cannot have pockets for the formation of head reinforcements in the tobacco rod due to the circular knife, the compression of the rod required for the head reinforcements of the cigarettes is produced by means of the rotating eccentric. This has the advantage that in the subsequent wrapping of the tobacco rod with cigarette paper, no additional deformation work has to be done, as is necessary when using trimmer disks with pockets that produce a tobacco rod of irregular height, because the excess with the pocket wheels at an irregular distance from the suction line conveyor is separated. Claim 9 specifies a particularly advantageous arrangement of the eccentrics for the tobacco rod compression. This is selected according to the invention so that the compressed sections in the tobacco rod cannot expand again until the excess is removed. The features of claim 10 are provided to ensure that the tobacco rod is compressed as uniformly as possible. Claims 11 and 12 relate to preferred designs of the deflector element.

Die Erfindung bietet den Vorteil, daß der Überschuß von einem Tabakstrang in einer Zigarettenstrangmaschine sehr schonend abgenommen werden kann, so daß der abgenommene Überschußtabak ohne zusätzlichen Qualitätsverlust wieder in den Strangaufbau zurückgeführt werden kann. Gleichzeitig wird der abgenommene Überschußtabak in eine bestimmte Richtung gelenkt und kann ohne Verlust weiter verwendet werden. Die für die Kopfverstärkung der Zigaretten erforderlichen Verdichtungen des Tabakstrangs werden sehr gleichmäßig erzeugt und sind so ausgebildet, daß sie beim Umhüllen des Tabakstrangs mit einem Zigarettenpapier keine zusätzliche Verformungsarbeit erfordern. Wegen des kompakten Aufbaus der Abnahmevorrichtung gemäß der Erfindung bleibt die im Strang erzeugte Verdichtung bis zur Überschußabnahme optimal erhalten. Insgesamt gewährleistet die Abnahmevorrichtung nach der Erfindung die Herstellung eines Tabakstrangs hoher Qualität und Gleichmäßigkeit bei geringem technischen Aufwand.The invention offers the advantage that the excess can be removed very gently from a tobacco rod in a cigarette rod making machine, so that the removed excess tobacco can be returned to the rod structure without additional loss of quality. At the same time, the excess tobacco removed is directed in a certain direction and can be used without loss. The compression of the tobacco rod required for the head reinforcement of the cigarettes are generated very evenly and are designed so that they do not require any additional deformation work when wrapping the tobacco rod with a cigarette paper. Because of the compact design of the take-off device according to the invention, the compression generated in the strand is optimally retained until the excess is taken off. Overall, the removal device according to the invention ensures the production of a tobacco rod of high quality and uniformity with little technical effort.

Die Erfindung wird nun anhand der Zeichnung näher erläutert.The invention will now be explained in more detail with reference to the drawing.

Es zeigen

Figur 1
eine schematische Seitenansicht eines Ausführungsbeispiels der Vorrichtung nach der Erfindung,
Figur 2
eine vergrößerte Ansicht in Richtung des Pfeiles B in Figur 1 und
Figur 3
eine ebenfalls vergrößerte Ansicht in Richtung des Pfeiles C in Figur 2.
Show it
Figure 1
2 shows a schematic side view of an embodiment of the device according to the invention,
Figure 2
an enlarged view in the direction of arrow B in Figure 1 and
Figure 3
an enlarged view in the direction of arrow C in Figure 2.

Figur 1 zeigt ein Ausführungsbeispiel einer Vorrichtung nach der Erfindung in einer schematischen Seitenansicht. Mit 1 ist ein Saugstrangförderer einer im übrigen nicht dargestellten Zigarettenstrangmaschine bezeichnet. Als Saugstrangförderer ist ein luftdurchlässiges Tabakband 2 vorgesehen, z.B. ein perforiertes Band oder ein luftdurchlässiges Gewebeband, das um eine vordere und eine hintere Umlenkrolle 3a bzw. 3b sowie um Führungsrollen 4 umläuft. Das untere Trum 2a des Tabakbandes 2 ist in einem Tabakkanal 6 über beabstandete Stützrollen 7 geführt und bildet auf diese Weise einen luftdurchlässigen Kanalboden. Der Tabakkanal 6 verläuft geradlinig in einem Führungskörper 8 mit parallelen Seitenwangen 8a und 8b (vgl. Fig. 3). Dem im Tabakkanal 6 geführten Tabakband 2 ist rückseitig eine Unterdruckkammer 9 zugeordnet, die mit einer Unterdruckquelle 11 verbunden ist und durch das luftdurchlässige Tabakband 2 einen Saugzug bewirkt. Das Tabakband 2 läuft in Richtung eines Pfeiles 12 um.Figure 1 shows an embodiment of a device according to the invention in a schematic side view. 1 designates a suction line conveyor of a cigarette rod machine, which is otherwise not shown. An air-permeable tobacco belt 2 is provided as the suction line conveyor, e.g. a perforated band or an air-permeable fabric band which runs around a front and a rear deflection roller 3a or 3b and around guide rollers 4. The lower run 2a of the tobacco band 2 is guided in a tobacco channel 6 over spaced support rollers 7 and in this way forms an air-permeable channel floor. The tobacco channel 6 runs in a straight line in a guide body 8 with parallel side cheeks 8a and 8b (cf. FIG. 3). The tobacco band 2 guided in the tobacco channel 6 is assigned a vacuum chamber 9 on the back, which is connected to a vacuum source 11 and causes a suction draft through the air-permeable tobacco band 2. The tobacco band 2 runs in the direction of an arrow 12.

Die Mündung eines Tabakschachts 13, durch den aus einem nicht dargestellten Verteiler aufgelockerte Tabakfasern in Richtung der Pfeile 14 zugeführt werden, definiert eine Strangaufbauzone Z in welcher der Tabakstrang 16 bis zu seiner vollen Höhe aufgeschauert wird.The mouth of a tobacco shaft 13, through which loosened tobacco fibers are fed from a distributor (not shown) in the direction of arrows 14, defines a strand build-up zone Z in which the tobacco rod 16 is expanded up to its full height.

Stromab der Strangaufbauzone Z ist eine Überschußabnahmevorrichtung 17 angeordnet, welche überschüssigen Tabak von dem Tabakstrang 16 abnimmt.Arranged downstream of the line build-up zone Z is an excess removal device 17 which takes off excess tobacco from the tobacco rod 16.

Das Abgabeende 18 des Tabakbandes 2 bzw. des Tabakkanals 6 liegt oberhalb des Papiereinlaufs einer Formateinrichtung 19, in welcher der Tabakstrang mit einem in Pfeilrichtung 21a zugeführten Hüllmaterialstreifen, z.B. einem Zigarettenpapierstreifen 21, umhüllt wird. Ein umlaufendes Formatband 22 fördert den Zigarettenpapierstreifen 21 und den auf diesen abgelegten Tabakstrang 16 unter einem Einlauffinger 23 hindurch in das Format 19, in welchem der Zigarettenpapierstreifen 21 längslaufend um den Tabakstrang geschlossen wird.The discharge end 18 of the tobacco band 2 or the tobacco channel 6 lies above the paper inlet of a format device 19, in which the tobacco rod is encased with a wrapping material strip, for example a cigarette paper strip 21, which is fed in the direction of the arrow 21a. A circulating format belt 22 promotes the cigarette paper strip 21 and the tobacco rod 16 placed thereon under an entry finger 23 into the format 19 in which the cigarette paper strip 21 is closed longitudinally around the tobacco rod.

Die Abnahmevorrichtung 17 wird unter gleichzeitiger Bezugnahme auf die Figuren 1 bis 3 näher beschrieben. Sie weist um parallele Achsen 24a und 24b umlaufende Haltescheiben 26a und 26b auf. Die Bewegungsrichtung des Strangs ist mit dem Pfeil 27 und die Drehrichtung der Haltescheiben mit den Pfeilen 28a und 28b kenntlich gemacht. Die Haltescheiben 26a und 26b laufen im gezeigten Ausführungsbeispiel in einer gemeinsamen Ebene um, deren Abstand zum Saugstrangförderer 2 gerade der gewünschten Stranghöhe des fertigen Strangs gleich ist. Die Haltescheiben berühren sich an ihrem Umfang gerade in der Mitte des Tabakstrangs 16 und trennen den Überschußtabak vom Tabakstrang ab. Zum Abnehmen des Überschußtabaks in der Berührungszone der umlaufenden Haltescheiben ist ein in Pfeilrichtung 29 um eine Messerachse 31 rotierendes Kreismesser 32 vorgesehen. Die Umlaufebene des Kreismessers 32 ist etwa parallel zu der Ebene der Haltescheiben 26a und 26b und berührt diese in der Berührungszone 33 der Haltescheiben oder verläuft dicht darüber, so daß der zwischen den Haltescheiben festgehaltene Tabak abgescheert wird. Zwischen der Ebene des umlaufenden Kreismessers 32 und der Oberflächenebene der Haltescheiben 26 kann durch Neigung der Messerachse 31 zu den Achsen 24 der Haltescheiben ein kleiner Freiwinkel vorgesehen sein, um den Verschleiß am Messer möglichst gering zu halten.The removal device 17 is described in more detail with simultaneous reference to FIGS. 1 to 3. It has retaining disks 26a and 26b which run around parallel axes 24a and 24b. The direction of movement of the strand is indicated by arrow 27 and the direction of rotation of the holding disks by arrows 28a and 28b. In the exemplary embodiment shown, the holding disks 26a and 26b run in a common plane, the distance of which from the suction line conveyor 2 is just the same as the desired line height of the finished line. The holding disks touch on their circumference just in the middle of the tobacco rod 16 and separate the excess tobacco from the tobacco rod. A circular knife 32 rotating in the direction of arrow 29 about a knife axis 31 is provided to remove the excess tobacco in the contact zone of the rotating holding disks. The circumferential plane of the circular knife 32 is approximately parallel to the plane of the holding disks 26a and 26b and touches them in the contact zone 33 of the holding disks or runs closely above them, so that the tobacco held between the holding disks is sheared off. A small clearance angle can be provided between the plane of the revolving circular knife 32 and the surface plane of the holding disks 26 by inclining the knife axis 31 to the axes 24 of the holding disks in order to keep the wear on the knife as low as possible.

Gemäß der Erfindung ist dem Kreismesser 32 ein Abweiserelement 34 zugeordnet, das als konzentrisch um die Messerachse umlaufender Rotationskörper 36 mit einer als Abweiserfläche wirkenden, axial verlaufenden Umfangsfläche 37 ausgebildet ist.According to the invention, a deflector element 34 is assigned to the circular knife 32, which is designed as a rotating body 36 concentrically rotating around the knife axis with an axially extending peripheral surface 37 acting as a deflector surface.

Diese Abweiserfläche 37 des Rotationskörpers kann kegelstumpfförmig verlaufen, wie das die Figuren 1 und 2 zeigen. Sie kann auch, was nicht dargestellt ist, eine konkave Auskehlung aufweisen. Dieses Abweiserelement 34, das synchron mit dem Kreismesser 32 umläuft, bewirkt, daß der vom Strang abgetrennte Überschußtabak 38 in eine bestimmte Vorzugsrichtung abgelenkt wird, ohne daß mechanische Schlagbeanspruchungen wie bei den bekannten Paddelrädern erforderlich sind. Der abgeschnittene und abgelenkte Überschußtabak 38 behält daher im wesentlichen seine Konsistenz und verliert durch das Abschneiden selbst nur geringfügig an Qualität.This deflector surface 37 of the rotating body can run in the shape of a truncated cone, as shown in FIGS. 1 and 2. It can also have a concave groove, which is not shown. This deflector element 34, which rotates in synchronism with the circular knife 32, has the effect that the excess tobacco 38 separated from the strand is deflected in a certain preferred direction without mechanical impact stresses as in the known paddle wheels being required. The cut and distracted excess tobacco 38 therefore essentially maintains its consistency and only marginally loses quality due to the cutting itself.

Das Kreismesser 32 kann stirnseitig am Abweiserelement 34 angebracht sein, wie das in Figur 1 dargestellt ist. Dieses Kreismesser ist dann separat auswechselbar. Als Kreismesser 32 kann auch, wie in Figur 3 dargestellt, eine Schneidkante 39 dienen, die am Umfang der Stirnseite des Abweiserkörpers 36 ausgebildet ist. Diese Schneidkante 39 bzw. auch das separate Kreismesser 32 können aus einem harten, verschleißarmen Material bestehen. Damit werden hohe Standzeiten der Abnahmevorrichtung erreicht.The circular knife 32 can be attached to the end of the deflector element 34, as shown in FIG. 1. This circular knife can then be replaced separately. As shown in FIG. 3, a cutting edge 39 can also serve as the circular knife 32, which is formed on the circumference of the end face of the deflector body 36. This cutting edge 39 and also the separate circular knife 32 can consist of a hard, wear-resistant material. Long service lives of the take-off device are thus achieved.

Der in der Standaufbauzone Z gebildete Tabakstrang 16 weist eine unregelmäßige Oberfläche mit Erhöhungen und Vertiefungen auf. Um die Unregelmäßigkeit der Strangoberfläche zu beseitigen, ist ein Abnahmemittel 41 in Gestalt eines in Pfeilrichtung 42 rotierenden Paddelrades 43 vorgesehen. Die Achse des Paddelrades 43 ist zur Strangrichtung schräg angestellt, so daß das rotierende Paddelrad die Erhebungen von der Strangoberfläche zur Seite hin entfernt, wie das in Figur 1 angedeutet ist. Das Paddelrad ist zur Strangoberfläche so eingestellt, daß der mit ihm vergleichmäßigte Tabakstrang immer noch eine beträchtliche Überschußmenge an Tabak enthält. Zwischen dem Paddelrad 43 und den Haltescheiben 26 ist ein Verdichtungsmittel 44 in Form eines in Pfeilrichtung 46 umlaufenden Nockenrades 47 mit an seinem Umfang gleichmäßig verteilten Verdichtungsnocken 48 angeordnet. Die Verdichtungsnocken 48 drücken bei der Rotation des Nockenrades 47 mit Abstand aufeinanderfolgende Strangabschnitte senkrecht zur Ebene des Strangförderers zusammen und verdichten den in diesen Abschnitten 49 enthaltenen Tabak auf definierte Weise.The tobacco rod 16 formed in the stand construction zone Z has an irregular surface with elevations and depressions. In order to eliminate the irregularity of the strand surface, a removal means 41 in the form of a paddle wheel 43 rotating in the direction of arrow 42 is provided. The axis of the paddle wheel 43 is set at an angle to the strand direction, so that the rotating paddle wheel removes the elevations from the strand surface to the side, as indicated in FIG. 1. The paddle wheel is adjusted to the surface of the strand so that the tobacco rod which is evened out with it still contains a considerable excess amount of tobacco. Between the Paddle wheel 43 and the holding disks 26 are arranged with a compression means 44 in the form of a cam wheel 47 rotating in the direction of arrow 46 with compression cams 48 evenly distributed over its circumference. When the cam wheel 47 rotates, the compression cams 48 compress successive strand sections perpendicular to the plane of the strand conveyor and compress the tobacco contained in these sections 49 in a defined manner.

Im Betrieb wird der in der Strangaufbauzone Z aufgeschauerte Tabakstrang 16 mit dem Paddelrad 43 zunächst durch Abnahme der an der Oberfläche des Strangs vorhandenen Erhebungen vergleichmäßigt, um definierte Strangverhältnisse zu schaffen. Der so definierte Faserstrang wird mit den Nocken 48 des Nockenrades 47 in gleichmäßigen Abständen verdichtet, so daß Strangabschnitte 49 höherer Tabakdichte entstehen. Dabei ist das Nockenrad 47 so weit in den Einlaufzwickel 51 der rotierenden Haltescheiben 26 verlegt, daß die verdichteten Abschnitte 49 des Strangs bis zur Überschußabnahme nicht mehr nennenswert expandieren können. In Figur 2 ist durch die Andeutung eines verdichteten Strangabschnitts 49a die Position angedeutet, in der sich der gerade aktive Nocken 48a (s.Fig.1) im Augenblick der Einwirkung auf den Tabakstrang befindet.In operation, the tobacco rod 16, which is exfoliated in the strand building zone Z, is first equalized with the paddle wheel 43 by reducing the elevations present on the surface of the rod, in order to create defined strand relationships. The fiber strand thus defined is compressed with the cams 48 of the cam wheel 47 at regular intervals, so that strand sections 49 of higher tobacco density are produced. The cam wheel 47 is laid so far in the inlet gusset 51 of the rotating holding disks 26 that the compressed sections 49 of the strand can no longer expand significantly until the excess is removed. In FIG. 2, the indication of a compacted strand section 49a indicates the position in which the currently active cam 48a (see FIG. 1) is at the moment of the action on the tobacco rod.

Dieser mit verdichteten Abschnitten 49 versehene Tabakstrang 16, der immer noch eine beträchtliche Menge an Überschußtabak enthält, läuft unter die Haltescheiben 26a und 26b wobei der Überschuß zwischen den Haltescheiben eingeklemmt und von dem rotierenden Kreismesser 32 abgeschnitten wird. Die abgeschnittenen Tabakfasern werden von der Abweiserfläche 37 des Abweiserkörpers 36 in eine bestimmte vorgegebene Richtung, die in den Figuren 2 und 3 mit 38 bezeichnet ist, abgelenkt, so daß sie auf einen Sammelförderer gelangen können, der sie in den Produktionsprozeß zurückfördert. Der vom Überschußtabak befreite Tabakstrang 16 wird auf dem Zigarettenpapierstreifen 21 abgelegt und mit dem Formatband 22 in die Formateinrichtung 19 bewegt, wo der Zigarettenpapierstreifen 21 in bekannter Weise um den Tabakstrang herumgelegt und geschlossen wird. Von dem so entstehenden umhüllten Zigarettenstrang werden durch Schnitte durch die verdichteten Strangabschnitte 49 hindurch Einzel- oder Mehrfachzigaretten mit Kopfverstärkungen an ihren Enden abgetrennt.This tobacco rod 16 provided with compressed sections 49, which still contains a considerable amount of excess tobacco, runs under the holding disks 26a and 26b, the excess being pinched between the holding disks and cut off by the rotating circular knife 32. The cut tobacco fibers are deflected by the deflector surface 37 of the deflector body 36 in a certain predetermined direction, which is denoted by 38 in FIGS. 2 and 3, so that they can reach a collecting conveyor, which they can enter Promotes the production process. The tobacco rod 16 freed from excess tobacco is placed on the cigarette paper strip 21 and moved with the format belt 22 into the format device 19, where the cigarette paper strip 21 is placed around the tobacco rod and closed in a known manner. Single or multiple cigarettes with head reinforcements at their ends are separated from the resulting wrapped cigarette rod by cuts through the compressed rod segments 49.

Claims (12)

Vorrichtung in einer Zigarettenstrangmaschine zum Abnehmen von überschüssigem Tabak von einem an einem Saugstrangförderer in einem Tabakkanal bewegten Tabakstrang mit zwei in entgegengesetzten Richtungen umlaufenden, sich in einem der vorgesehenen Stranghöhe entsprechenden Abstand vom Saugstrangförderer etwa in der Mitte des Tabakkanals wenigstens annähernd mit ihrem Umfang berührenden Haltescheiben und einem den Haltescheiben auf der dem Strang abgewandten Seite zugeordneten Abnahmemittel, dadurch gekennzeichnet, daß das Abnahmemittel als um eine Messerachse (31) rotierendes Kreismesser (32) ausgebildet ist, dessen Schneidkante (39) den Berührungsbereich (33) der Haltescheiben (26a,b) auf deren dem Strang (16) abgewandter Seite durchläuft.Device in a cigarette rod machine for removing excess tobacco from a tobacco rod moving on a suction rod conveyor in a tobacco duct with two retaining disks rotating in opposite directions and at a distance corresponding to the intended strand height from the suction rod conveyor approximately in the middle of the tobacco duct and at least approximately with their circumference and a removal means assigned to the holding disks on the side facing away from the strand, characterized in that the removal means is designed as a circular knife (32) rotating about a knife axis (31), the cutting edge (39) of which contacts the area (33) of the holding disks (26a, b) on the side facing away from the strand (16). Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Kreismesserachse (31) im wesentlichen normal zur Oberfläche des Strangförderers (2) verläuft.Device according to claim 1, characterized in that the circular knife axis (31) extends essentially normal to the surface of the strand conveyor (2). Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß dem Kreismesser (32) ein Abweiserelement (34) zum Bewegen der vom Strang (16) abgenommenen Tabakteilchen (38) in bevorzugte Richtungen zugeordnet ist.Apparatus according to claim 1 or 2, characterized in that the circular knife (32) is assigned a deflector element (34) for moving the tobacco particles (38) removed from the strand (16) in preferred directions. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß das Abweiserelement (34) als um die Messerachse (31) umlaufender Rotationskörper (36) mit einer als Abweiserfläche (37) vorgesehenen axial verlaufenden Umfangsfläche ausgebildet ist.Apparatus according to claim 3, characterized in that the deflector element (34) is designed as a rotating body (36) rotating around the knife axis (31) with an axially extending peripheral surface provided as a deflector surface (37). Vorrichtung nach Anspruch 3 oder 4, dadurch gekennzeichnet, daß das Kreismesser (32) stirnseitig am Abweiserelement (34,36) angebracht ist.Apparatus according to claim 3 or 4, characterized in that the circular knife (32) is attached to the end of the deflector element (34, 36). Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß die Abweiserfläche (37) des Rotationskörpers (36) im wesentlichen kegelstumpfförmig ausgebildet ist.Apparatus according to claim 4, characterized in that the deflector surface (37) of the rotating body (36) is substantially frustoconical. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß die Abweiserfläche (37) als konkave Auskehlung der Umfangsfläche ausgebildet ist.Apparatus according to claim 4, characterized in that the deflector surface (37) is designed as a concave groove on the peripheral surface. Vorrichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß den Haltescheiben (26a,b) ein Verdichtungsmittel (44) zum abschnittsweise Verdichten des Tabakstrangs (16) vor der Überschußabnahme zugeordnet ist.Device according to one of claims 1 to 7, characterized in that the holding disks (26a, b) are assigned a compacting means (44) for compressing the tobacco rod (16) in sections before the excess is removed. Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, daß im stromaufwärtigen Zwickelbereich (51) der Haltescheiben (26a,b) als Verdichtungsmittel (44) ein den Tabakstrang (16) in vorgegebenen Abständen verdichtendes umlaufendes Exzenterrad (47) vorgesehen ist.Apparatus according to claim 8, characterized in that in the upstream gusset area (51) of the holding disks (26a, b) as compression means (44) there is provided a rotating eccentric wheel (47) which compresses the tobacco rod (16) at predetermined intervals. Vorrichtung nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß stromauf vor den Haltescheiben (26a,b) ein zweites Abnahmemittel (41) vorgesehen ist, das zur Vergleichmäßigung des Überschusses an Tabakteilchen einen Teil des ursprünglichen Überschusses vom Tabakstrang (16) abnimmt.Device according to one of claims 1 to 9, characterized in that a second removal means (41) is provided upstream of the holding disks (26a, b), which removes part of the original excess from the tobacco rod (16) in order to equalize the excess of tobacco particles. Vorrichtung nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß das Abweiserelement (34) an seiner der Haltescheibenebene zugewandten Stirnseite eine als Kreismesser (32) wirkende, zu seiner Drehachse konzentrische Schneidkante (39) aufweist.Device according to one of claims 1 to 10, characterized in that the deflector element (34) has on its end face facing the holding disc plane a cutting edge (39) which acts as a circular knife (32) and is concentric with its axis of rotation. Vorrichtung nach Anspruch 11, dadurch gekennzeichnet, daß mindestens die Schneidkante (39) des Abweiserelementes (34) aus einem harten verschleißarmen Material besteht.Device according to claim 11, characterized in that at least the cutting edge (39) of the deflector element (34) consists of a hard, wear-resistant material.
EP94114573A 1993-09-29 1994-09-16 Device for removing the excess of tobacco from a tobacco rod Expired - Lifetime EP0645098B1 (en)

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DE4333046A DE4333046A1 (en) 1993-09-29 1993-09-29 Device for removing excess tobacco from a tobacco rod
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EP0809944A1 (en) * 1996-05-29 1997-12-03 Japan Tobacco Inc. Device for trimming shredded tobacco layer formed in cigarette manufacturing machine
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CN1040835C (en) 1998-11-25
ATE180389T1 (en) 1999-06-15
EP0645098B1 (en) 1999-05-26
JPH07155158A (en) 1995-06-20
DE4333046A1 (en) 1995-03-30
CN1106240A (en) 1995-08-09
DE59408306D1 (en) 1999-07-01
ES2133456T3 (en) 1999-09-16
JP3615793B2 (en) 2005-02-02
US5526826A (en) 1996-06-18

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