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EP3852558B1 - Vorrichtung zur inspektion eines bandes der tabakverarbeitenden industrie - Google Patents

Vorrichtung zur inspektion eines bandes der tabakverarbeitenden industrie Download PDF

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Publication number
EP3852558B1
EP3852558B1 EP19786870.6A EP19786870A EP3852558B1 EP 3852558 B1 EP3852558 B1 EP 3852558B1 EP 19786870 A EP19786870 A EP 19786870A EP 3852558 B1 EP3852558 B1 EP 3852558B1
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EP
European Patent Office
Prior art keywords
conveyor belt
belt
property
control signal
detecting device
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Application number
EP19786870.6A
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English (en)
French (fr)
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EP3852558A1 (de
Inventor
Ivan Eusepi
Eura Trivisonno
Mauro Galli
Massimo Sartoni
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GD SpA
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GD SpA
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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
    • A24C5/32—Separating, ordering, counting or examining cigarettes; Regulating the feeding of tobacco according to rod or cigarette condition
    • A24C5/34—Examining cigarettes or the rod, e.g. for regulating the feeding of tobacco; Removing defective cigarettes
    • 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
    • A24C5/1871—Devices for regulating the tobacco quantity

Definitions

  • This invention relates to an apparatus for inspecting a conveyor belt of the tobacco industry.
  • this invention is intended for making an apparatus for monitoring and inspecting the degree of wear of a conveyor belt so as to allow an assessment of whether or not it meets one or more integrity criteria, on the basis of which it is possible to determine when it is appropriate to substitute the belt.
  • conveyor belts which allow them to be conveyed, in particular through the individual operating stations or between adjacent stations.
  • Prior art machines for the production of continuous rods of tobacco usually use a substantially vertical flue fed at the bottom by a continuous flow of tobacco particles, at the top end of which a suction belt is positioned, on which a continuous mass of tobacco forms.
  • That suction belt is suitable for feeding the continuous mass of tobacco along a predetermined path at least partly defined by the suction belt itself, to a preforming device which creates a continuous ribbon and then to a forming channel for a continuous rod of tobacco in which a wrapping web, for example made of paper, is forced to wrap around the continuous ribbon of tobacco so as to form a continuous cylinder or rod of the tobacco industry, such as a cigarette rod, which will subsequently be divided into pieces by a suitable cutting device.
  • suction belts are a particular type of conveyor belt and have a porous surface, preferably with a grid structure, to allow the passage of a suction air flow, but not of the semi-finished product which they are designed to hold.
  • conveyor belts of the suction type over time tend to grow slacker, stretching due to yielding and wearing, until they deteriorate to the point that they need to be substituted. That occurs quite often, even more than once during the same work shift. Therefore, in prior art machines and apparatuses, to prevent the suction belt from breaking, lengthy machine down times are required in order to remove/substitute the belt, and because of the unpredictable effects that the belt breaking could have on the production chain, preventive substitution is usually carried out at regular intervals.
  • each substitution requires stoppage of the machine in which the suction belt is installed, blocking processing of the semi-finished products in transit.
  • a preventive substitution significantly increases the number of substitutions performed in a given period of time, considerably reducing the production capacity of a processing plant.
  • That problem even if potentially with a reduced time incidence, may also occur in other processes and with other types of belts used in the tobacco sector.
  • the technical purpose which forms the basis of this invention is to propose an apparatus for inspecting a conveyor belt of the tobacco industry which overcomes at least some of the above-mentioned disadvantages of the prior art.
  • this invention shows an apparatus for inspecting a belt of the tobacco industry which comprises a conveyor configured to convey a product, be it a finished or semi-finished product, of the tobacco industry along a conveying path and a detecting device.
  • the conveyor comprises at least one conveyor belt provided with at least one operating section which is used to convey the product, and one return section which is not used to convey the product.
  • the detecting device located near the conveyor belt, defines a detection zone configured to slidably receive the conveyor belt and is configured to detect at least one property of the conveyor belt when the latter is in transit through the detection zone and to generate a control signal representing that at least one property.
  • the apparatus according to this invention allows an assessment of the structural integrity of the conveyor belt so as to precisely assess the moment when it is effectively necessary to substitute the belt.
  • This invention also relates to a method for checking the quality of a conveyor belt of the tobacco industry, comprising the following steps:
  • the reference number 100 is used to indicate an apparatus for inspecting a conveyor belt of the tobacco industry.
  • the apparatus 100 described herein comprises in particular a conveyor 10 and a detecting device 20.
  • the conveyor 10 is configured to convey a product, be it a finished or semi-finished product, for the tobacco industry along a conveying path.
  • a product be it a finished or semi-finished product
  • the term finished product means any article of the tobacco industry whose production process has ended and which is therefore potentially ready for use.
  • semi-finished product means any material used in the tobacco industry for making, in particular for filling, a finished product, for example: a mass of tobacco fibre, a ribbon of filter material, a ribbon of pieces of filter, even heterogeneous, or a crimped tobacco ribbon.
  • the conveyor 10 comprises at least one conveyor belt 11 which has at least one operating section 11a which is used to convey the product and one return section 11b which is not used to convey the product.
  • the conveyor belt 11 defines a closed path substantially divided into two portions: a first portion for conveying and transporting the product from one processing station to the next, or through a processing station, and a second portion substantially for closing the path followed by the conveyor belt 11 in which it does not convey or transport any product.
  • the conveyor belt 11 is usually subjected to tension so that it can be pulled by a motor-driven pulley 12 of the conveyor 10.
  • the conveyor belt 11 is stretched, which over time reduces its effective degree of tensioning, which therefore deviates from the desired and optimal degree of tensioning.
  • the conveyor 10 comprises a tensioning pulley 13 which is movable in such a way as to allow suitable lengthening of the path which is followed by the conveyor belt 11, with the aim of guaranteeing constant application of the desired degree of tensioning.
  • the tensioning pulley 13 may be associated with a suitable tensioning device 13a, for example a pneumatic cylinder or an equivalent thrust unit, movable according to a thrust motion suitable for applying to the conveyor belt 11 a force having an intensity and direction which are suitable for countering the stretching of the conveyor belt 11 over time, thereby keeping it taut.
  • a suitable tensioning device 13a for example a pneumatic cylinder or an equivalent thrust unit, movable according to a thrust motion suitable for applying to the conveyor belt 11 a force having an intensity and direction which are suitable for countering the stretching of the conveyor belt 11 over time, thereby keeping it taut.
  • the detecting device 20 defines a detection zone "Z", through which the conveyor belt 11 slides, and which is configured to detect at least one property of the conveyor belt 11 when the latter is in transit through the detection zone "Z".
  • the detecting device 20 is further configured to generate a control signal representing that at least one property detected.
  • the term property means any characteristic of the conveyor belt 11 capable of supplying indications about its state of wear, such as but not limited to: thickness, length, density per unit of length.
  • the detecting device 20 is preferably located at the return section 11b of the conveyor belt 11, in such a way as to ensure that only the conveyor belt 11 passes through the detection zone "Z" and that it is not possible for the product moved by the conveyor belt 11 to accidentally also pass through that zone.
  • the detecting device 20 is configured to monitor the conveyor belt 11 as the latter slides through the detection zone "Z", in such a way as to allow a real-time analysis of it, so that it is possible to determine its state of deterioration over time and, if necessary, to determine whether it needs to be substituted.
  • the apparatus 100 comprises, or is associated with, a control unit "C", which is configured to receive and process the control signal and to determine whether the at least one property measured, represented by the control signal, meets one or more predetermined integrity criteria.
  • control unit "C” is configured to store a reference control signal generated during a first complete turn of the conveyor belt 11 relative to the detection zone "Z".
  • the control unit "C” is further configured to compare the reference control signal with the control signals generated during each subsequent turn of the conveyor belt 11, in order to determine whether the at least one property monitored meets the predetermined integrity criteria.
  • control unit "C” is further configured to emit an alarm signal when the at least one property does not meet one or more of the predetermined integrity criteria.
  • That alarm may be any type of audible or visual signal capable of alerting an operator to the need to interrupt the activity in progress at the conveyor 10 and to proceed with substitution of the conveyor belt 11.
  • control unit “C” comprises a readable storage medium configured to store the predetermined integrity criteria and preferably also the reference control signal and the control signal to allow them to be subsequently analysed, if necessary.
  • control unit "C” contains in the readable storage medium the reference parameters and the reference control signal on the basis of which the state of integrity of the conveyor belt 11 is assessed and can further store, archiving them, the various control signals generated by the detecting device 20, both relative to the same conveyor belt 11, throughout its useful life, and relative to successive conveyor belts 11.
  • That device allows the acquisition of statistical information about the behaviour of conveyor belts 11 over time, in such a way as to allow an analysis of them intended for studying various forms of wear which may occur, in order to be able to devise any mechanisms for preventing them, thereby extending the useful life of the individual conveyor belts 11.
  • the detecting device 20 comprises an encoder 21 configured to generate a position signal representing a position of each portion of the conveyor belt 11 relative to the detecting device 20.
  • the encoder makes it possible to determine which portion of the conveyor belt 11 is inspected at a given moment by the detecting device 20.
  • the detecting device 20 comprises an electromagnetic sensor 22a, preferably operating in the microwave range, which defines a detecting channel configured to slidably receive the conveyor belt, according to that embodiment the detecting channel defining the detection zone "Z".
  • the detecting device 20 comprises an optical sensor 22b, preferably a photocell or a video camera.
  • the electromagnetic sensor 22a or the optical sensor 22b may also have the function of zeroing the encoder 32.
  • the senor 22a, 22b may communicate to the encoder 32, preferably by means of the control unit "C", that a predetermined distinctive element is again passing through the detection zone "Z", therefore indicating that the conveyor belt 11 itself has performed a full turn relative to the encoder 21 which must therefore be zeroed.
  • the conveyor 10 is a suction belt conveyor for conveying a semi-finished product in the form of tobacco fibre and comprises at least one guide channel for guiding the tobacco fibre, delimited laterally by two side walls and, transversely to those side walls, by the conveyor belt 11.
  • the conveyor 10 is configured to hold and convey the semi-finished product along a conveying path and comprises at least one guide channel, delimited at the sides by two side walls and at the top by a conveyor belt 11.
  • the conveyor belt 11 is permeable to air so that a sucked air flow generated inside the apparatus 100 can pass through the belt from the bottom upwards.
  • That air flow creates a vacuum on the lower surface of the conveyor belt 11.
  • the conveyor belt slides inside suitable guides which engage with a peripheral portion of it so as to aid its correct tensioning during use of the conveyor 10.
  • the conveyor 10 comprises a plurality of guide channels, preferably as shown in Figure 3 , two guide channels, each of which is couplable to respective detecting devices 20 according to the various embodiments indicated above.
  • This invention also relates to a method for checking the quality of a conveyor belt of the tobacco industry.
  • the method according to this invention comprises causing a conveyor belt 11 to pass through a detection zone "Z" of a detecting device 20.
  • the detecting device 20 to detect detecting at least one property of the conveyor belt 11 in transit through the detection zone "Z" and to generate a control signal identifying that property detected.
  • control signal is then processed in order to determine whether the at least one property measured meets a predetermined acceptability criterion.
  • the method disclosed also comprises a step of activating an alarm if the at least one property measured does not meet the predetermined acceptability criterion.
  • the method comprises performing an inspection of the conveyor belt 11 as soon as it has been installed on the conveyor, in such a way as to have a reference relative to its initial conditions and on the basis of which its state of structural integrity can be assessed.
  • the method comprises, before the step of detecting at least one property of the belt, causing the conveyor belt 11 to slide in the detection zone "Z" and making the conveyor belt perform a full turn, that is to say, making each portion of the conveyor belt 11 pass through the detection zone "Z" once.
  • the method therefore comprises processing the control signal, comparing it with the reference control signal.
  • the method comprises performing a measurement of the conveyor belt 11 as soon as it has been installed on the conveyor 10 so as to obtain a reference signal which will be compared with all of the control signals subsequently generated during use of the conveyor belts 11.
  • the belt will be able to continue operating normally, but as soon as that condition is no longer met, a suitable signal will alert an operator to the need to substitute the conveyor belt 11.
  • the method further comprises storing the control signal to allow it to be subsequently analysed, if necessary.
  • this invention achieves the preset aims, overcoming the disadvantages of the prior art by providing the user with an apparatus for inspecting a belt of the tobacco industry which allows use of the belt to be optimised.

Landscapes

  • Control Of Conveyors (AREA)
  • Manufacturing Of Cigar And Cigarette Tobacco (AREA)

Claims (11)

  1. Vorrichtung zur Inspektion eines Bandes der tabakverarbeitenden Industrie, umfassend:
    - einen Förderer (10), der ausgelegt ist, um ein Produkt, egal, ob es sich um ein fertiges oder halb fertiges Produkt für die tabakverarbeitende Industrie handelt, entlang eines Förderwegs zu fördern, wobei der Förderer (10) mindestens ein Förderband (11) umfasst, das mit mindestens einer Betriebssektion (11a) ausgestattet ist, die genutzt wird, um das Produkt zu fördern, und einer Rücklaufsektion (11b), die nicht genutzt wird, um das Produkt zu fördern;
    - mindestens eine Erkennungsvorrichtung (20), die in der Nähe des Förderbandes (11) befindlich ist und eine Erkennungszone (Z) definiert, die ausgelegt ist, um das Förderband (11) verschiebbar zu empfangen, wobei die Erkennungsvorrichtung (20) ausgelegt ist, um mindestens eine Eigenschaft des durch die Erkennungszone (Z) laufenden Förderbandes (11) zu erkennen und ein Steuerungssignal zu generieren, das die mindestens eine Eigenschaft darstellt, wobei die Inspektionsvorrichtung eine Steuereinheit (C) umfasst oder damit assoziiert ist, die ausgelegt ist, um das Steuerungssignal zu empfangen und zu verarbeiten und zu ermitteln, ob die mindestens eine Eigenschaft ein oder mehrere vorgegebene Integritätskriterien erfüllt, dadurch gekennzeichnet, dass die Steuereinheit (C) ausgelegt ist, um ein Referenzsteuerungssignal zu speichern, das während einer ersten vollständigen Umdrehung des Förderbandes (11) relativ zur Erkennungszone (Z) generiert wird, und um das Referenzsteuerungssignal mit den Steuerungssignalen zu vergleichen, die während einer jeden darauffolgenden Umdrehung des Förderbandes (11) generiert werden, um zu ermitteln, ob die mindestens eine Eigenschaft das ein oder mehrere vorgegebene Integritätskriterien erfüllt.
  2. Vorrichtung nach Anspruch 1, wobei die Steuereinheit (C) ausgelegt ist, um ein Alarmsignal auszusenden, wenn die mindestens eine Eigenschaft das eine oder mehrere vorgegebene Integritätskriterien nicht erfüllt.
  3. Vorrichtung nach Anspruch 1 oder 2, wobei die Steuereinheit (C) ein lesbares Speichermedium umfasst, das ausgelegt ist, um das Steuerungssignal zu speichern, um zu erlauben, dass dieses ggf. später analysiert wird.
  4. Vorrichtung nach einem oder mehreren der vorhergehenden Ansprüche, wobei der Förderer (10) ein Saugbandförderer (10) zum Fördern eines halb fertigen Produkts in Form von Tabakfasern ist und mindestens einen Führungskanal zum Führen der Tabakfasern umfasst, der seitlich von zwei Seitenwänden und quer zu den Seitenwänden vom Förderband (11) begrenzt ist.
  5. Vorrichtung nach einem oder mehreren der vorhergehenden Ansprüche, wobei die Erkennungsvorrichtung (20) einen Encoder (21) umfasst, der ausgelegt ist, um ein Positionssignal zu generieren, das eine Position eines jeden Abschnitts des Saugbandes relativ zur Erkennungsvorrichtung (20) darstellt.
  6. Vorrichtung nach einem oder mehreren der vorhergehenden Ansprüche, wobei die Erkennungsvorrichtung (20) einen elektromagnetischen Sensor (22a) umfasst, der vorzugsweise im Mikrowellenbereich arbeitet, definierend einen Erkennungskanal, der ausgelegt ist, um das Saugband verschiebbar zu empfangen, wobei der Erkennungskanal die Erkennungszone (Z) definiert.
  7. Vorrichtung nach einem oder mehreren der Ansprüche 1-6, wobei die Erkennungsvorrichtung (20) einen optischen Sensor (22b) umfasst, bei dem es sich vorzugsweise um eine Fotozelle oder eine Videokamera handelt.
  8. Vorrichtung nach einem oder mehreren der Ansprüche 1-7, wobei die Erkennungsvorrichtung (20) in der Nähe der Rücklaufsektion (11b) des Förderbandes (11) befindlich ist.
  9. Verfahren zum Prüfen der Qualität eines Förderbandes (11) der tabakverarbeitenden Industrie, umfassend die folgenden Schritte:
    - Bewirken, dass ein Förderband (11) durch eine Erkennungszone (Z) einer Erkennungsvorrichtung (20) läuft;
    - mit der Erkennungsvorrichtung (20) Erkennen von mindestens einer Eigenschaft des durch die Erkennungszone (Z) laufenden Förderbandes (11) und Generieren eines Steuerungssignals, das die erkannte Eigenschaft identifiziert;
    - Verarbeiten des Steuerungssignals, um zu ermitteln, ob die mindestens eine gemessene Eigenschaft ein vorgegebenes Akzeptanzkriterium erfüllt, dadurch gekennzeichnet, dass vor dem Schritt zum Erkennen der mindestens einen Eigenschaft des Bandes die folgenden Schritte durchgeführt werden:
    - Bewirken, dass das Förderband (11) in die Erkennungszone (Z) verschoben wird, und Veranlassen, dass das Förderband (11) eine vollständige Umdrehung vollzieht;
    - gleichzeitig Erkennen von mindestens einer Eigenschaft des durch die Erkennungszone (Z) laufenden Förderbandes (11) mittels der Erkennungsvorrichtung (20);
    - Assoziieren der mindestens einen gemessenen Eigenschaft mit nachfolgenden Abschnitten des Saugbandes (11) und Generieren eines Referenzsteuerungssignals,
    und dadurch, dass der Schritt zum Verarbeiten einen Schritt zum Vergleichen des Referenzsteuerungssignals mit dem Steuerungssignal umfasst.
  10. Verfahren nach Anspruch 9, umfassend einen Schritt zum Aktivieren eines Alarms, wenn die mindestens eine gemessene Eigenschaft das vorgegebene Akzeptanzkriterium nicht erfüllt.
  11. Verfahren nach Anspruch 9 oder 10, umfassend einen Schritt zum Speichern des Steuerungssignals, um zu erlauben, dass dieses ggf. später analysiert wird.
EP19786870.6A 2018-09-21 2019-09-19 Vorrichtung zur inspektion eines bandes der tabakverarbeitenden industrie Active EP3852558B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT201800008809 2018-09-21
PCT/IB2019/057910 WO2020058899A1 (en) 2018-09-21 2019-09-19 Apparatus for inspecting a belt of the tobacco industry

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EP3852558A1 EP3852558A1 (de) 2021-07-28
EP3852558B1 true EP3852558B1 (de) 2023-09-06

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PL (1) PL3852558T3 (de)
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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4729468A (en) 1985-04-26 1988-03-08 Korber Ag Apparatus for monitoring the condition of filamentary belts in cigarette making machines and the like
US5103086A (en) 1989-05-19 1992-04-07 Korber Ag Method of and apparatus for ascertaining the density of a stream of fibrous material
DE19921224A1 (de) 1999-05-07 2000-11-23 Rheinische Braunkohlenw Ag Verfahren zur Überwachung eines endlos umlaufenden Gurts
EP1424016A1 (de) 2002-11-29 2004-06-02 Hauni Maschinenbau AG Umlaufendes Förderband zum Fördern eines Strangs der tabakverarbeitenden Industrie
WO2008031648A1 (de) 2006-09-13 2008-03-20 Phoenix Conveyor Belt Systems Gmbh Einrichtung zur überwachung einer förderanlage
EP2474486A1 (de) 2011-01-05 2012-07-11 HAUNI Maschinenbau AG Förderband mit Antriebsnocken und Förderrad zum Antreiben eines solchen Förderbands
DE102014112886A1 (de) 2014-09-08 2016-03-24 Khs Gmbh Polarisationskamera zur Überwachung von Förderbändern
EP3199041A1 (de) 2016-01-29 2017-08-02 Hauni Maschinenbau GmbH Saugbandeinheit mit stelleinrichtung zum verstellen des abstandes zwischen einer pressscheibe der saugbandeinheit und einem schaberelement sowie verfahren hierzu
WO2019170725A1 (de) 2018-03-06 2019-09-12 Hauni Maschinenbau Gmbh Saugbandförderer und strangmaschine der tabak verarbeitenden industrie sowie verwendung einer messeinrichtung in einem saugbandförderer einer strangmaschine der tabak verarbeitenden industrie

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4729468A (en) 1985-04-26 1988-03-08 Korber Ag Apparatus for monitoring the condition of filamentary belts in cigarette making machines and the like
US5103086A (en) 1989-05-19 1992-04-07 Korber Ag Method of and apparatus for ascertaining the density of a stream of fibrous material
DE19921224A1 (de) 1999-05-07 2000-11-23 Rheinische Braunkohlenw Ag Verfahren zur Überwachung eines endlos umlaufenden Gurts
EP1424016A1 (de) 2002-11-29 2004-06-02 Hauni Maschinenbau AG Umlaufendes Förderband zum Fördern eines Strangs der tabakverarbeitenden Industrie
WO2008031648A1 (de) 2006-09-13 2008-03-20 Phoenix Conveyor Belt Systems Gmbh Einrichtung zur überwachung einer förderanlage
EP2474486A1 (de) 2011-01-05 2012-07-11 HAUNI Maschinenbau AG Förderband mit Antriebsnocken und Förderrad zum Antreiben eines solchen Förderbands
DE102014112886A1 (de) 2014-09-08 2016-03-24 Khs Gmbh Polarisationskamera zur Überwachung von Förderbändern
EP3199041A1 (de) 2016-01-29 2017-08-02 Hauni Maschinenbau GmbH Saugbandeinheit mit stelleinrichtung zum verstellen des abstandes zwischen einer pressscheibe der saugbandeinheit und einem schaberelement sowie verfahren hierzu
WO2019170725A1 (de) 2018-03-06 2019-09-12 Hauni Maschinenbau Gmbh Saugbandförderer und strangmaschine der tabak verarbeitenden industrie sowie verwendung einer messeinrichtung in einem saugbandförderer einer strangmaschine der tabak verarbeitenden industrie

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Title
ANONYMOUS: "Predictive maintenance", WIKIPEDIA, THE FREE ENCYCLOPEDIA, 1 February 2017 (2017-02-01), XP093192113, Retrieved from the Internet <URL:https://en.wikipedia.org/w/index.php?title=Predictive_maintenance&oldid=763110243>
HAUNI-WERKE KÖRBER & CO. KG: "Betriebshandbuch Protos/VE 80 - B 2282", 19xx, HAUNI-WERKE KÖRBER & CO. KG, Hamburg
MUDASSIR ASFAND, TAUSEEF, KHAN JEHANGIR, NOOR ISHRAT, MAHMOOD MAHAWISH: "PRODUCTIVITY ENHANCEMENT IN TOBACCO COMPANY THROUGH TOTAL PRODUCTIVE MAINTENANCE", FIRST INTERNATIONAL CONFERENCE ON INDUSTRIAL ENGINEERING AND MANAGEMENT, 1 February 2017 (2017-02-01), XP093192111

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WO2020058899A1 (en) 2020-03-26
PL3852558T3 (pl) 2023-11-27
EP3852558A1 (de) 2021-07-28

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