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WO1999036752A1 - Procede et dispositif de pesee - Google Patents

Procede et dispositif de pesee Download PDF

Info

Publication number
WO1999036752A1
WO1999036752A1 PCT/IS1999/000001 IS9900001W WO9936752A1 WO 1999036752 A1 WO1999036752 A1 WO 1999036752A1 IS 9900001 W IS9900001 W IS 9900001W WO 9936752 A1 WO9936752 A1 WO 9936752A1
Authority
WO
WIPO (PCT)
Prior art keywords
belt
weighing
unit
conveyor
guiding unit
Prior art date
Application number
PCT/IS1999/000001
Other languages
English (en)
Inventor
Kristinn Steingrimsson
Original Assignee
Marel Hf.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Marel Hf. filed Critical Marel Hf.
Priority to AU25439/99A priority Critical patent/AU2543999A/en
Publication of WO1999036752A1 publication Critical patent/WO1999036752A1/fr

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G11/00—Apparatus for weighing a continuous stream of material during flow; Conveyor belt weighers
    • G01G11/003—Details; specially adapted accessories

Definitions

  • the invention relates to a method and apparatus for weighing by conveyor-type weighing unit, where a conveyor belt forming an endless loop is transported along a first guiding unit, defining a first conveying direction and extending in-between the top sides of a opposite arranged rollers.
  • the belt is driven in a revolving manner and transported over a weighing device in a downstream direction.
  • the weighing device being a part of the first guiding unit performs weighing of objects transported along the conveyor.
  • Conveyor weighing has been known weighing technique for quite some time.
  • Conveyor weighing apparatus have mainly been used for weighing of bulk material as grain, rocks and other such materials.
  • Conveyor weighing apparatus have mainly been used for weighing of bulk material as grain, rocks and other such materials.
  • the weighing of individual food pieces transported along a conveyor is today an important operation in processing of f.ex. fish filets and trimming of meat. If one had on the other hand to weigh every object individually on a stationary weighing unit, the processing speed would be diminished dramatically.
  • the object of the invention is to provide accurate conveyor-type weighing unit capable of weighing objects of varying dimension and at the same time, take into-account the disturbance caused by vibrations, friction or other forces caused by the transportation of the conveyor belt.
  • the so-called link-type belts most commonly used for conveyors, do not have uniform weight over the total length of the belt.
  • the weight of the belt is not uniform and the weight of the belt can change f.ex. due to material pieces being weighed sticking to the belt, slitage etc.
  • To conduct accurate measurements one must take into account the variance in the weight of the respective sections of the belt as well as the vibrations caused f.ex by the reverse (free) conveyance of the conveyor belt.
  • the conveyor-type weighing unit according to the invention is characterised in that a second guiding unit ( 18) defining a second reverse conveying direction ( 19), the second guiding unit (18) supporting the conveyor belt (3) under its reverse revolving conveyance, the second guiding unit ( 18) thereby absorbing/ eliminating the oscillations and force caused by the belt (3).
  • the invention is also characteristic in that the in the second conveying direction ( 19) being horizontal.
  • Further embodiment of the invention is characteristic in that in the second guiding means ( 18) extending approximately over the whole reverse horizontal conveyance direction ( 19) of the belt.
  • the invention is moreover characterised in that the placement of the in the second guiding means ( 19) being a horizontal and low friction beam like structure.
  • the invention is further characterised in that the the conveyor belt (3) is supported under its reverse revolving conveyance by a second guiding unit ( 18) defining a second reverse conveying direction ( 19), the second guiding unit (18) thereby absorbing/ eliminating the oscillations and vertical force of the belt (3).
  • Fig. 1 shows a perspective view of the conveyor-type weighing unit according to the invention
  • Fig. 2 is a side view of the conveyor-type weighing unit
  • Fig. 3 is a sectional view of the conveyor belt and a weighing platform of the weighing means seen from the side, and
  • Figure 4 show a weighing diagram for the sections of the belt, with and without objects being weighed
  • Figure 5 shows a side view of one possible design of the conveyor belt with support for the reverse conveyance of the conveyor belt.
  • the apparatus illustrated in the figure 1 - 3 comprise a conveyor-type weighing unit (2) arranged on a stationary supporting frame structure (41).
  • a conveyor belt (3) being a part of the conveyor-type weighing unit 4
  • the conveyor belt is transported along a first guiding unit ( 15) arranged horizontally in direction extending downstream in-between to top sides of two opposite arranged rollers ( 16, 17) .
  • a weighing means is incorporated as a part of the first guidmg unit and thereby forming a part of a platform the conveyor belt is transported along. As the belt is transported along the first guiding unit ( 15) continuous weighing measurement are made by the weighing means.
  • a computer data processing means ( 10) is connected to respective parts of the equipment for monitoring and controlling the operation.
  • FIG. 1 shows a perspective view of the conveyor-type weighing-unit according to the invention.
  • Figure 2 shows a side view of the same as fig 1 but where a side protecting plate (29) have been removed.
  • a conveyor-type weighing unit (2) supported by a frame (41) is illustrated.
  • the weighing unit (2) comprise a conveyor belt (3), forming a endless loop which is driven in a revolving manner by a driving unit (6), in a direction downstream ( 1 1) from an m-feed end (22) to an out- feed end (23).
  • the driving unit (6) can be equipped with cogged driving wheel for interception with the belt and can be located anywhere along the conveyor path of the belt and either push or pull the belt over the horizontal first guidmg unit.
  • the belt (3) rests on a guiding unit (15), from a first- (16) to a second roller ( 17).
  • the rollers can be with or without sprockets for interception with conveyor belt or for example non-rotating round end-units which the belt slide over.
  • a weighing device (4) forms a part of the guiding unit.
  • a computer data processing means ( 10) is connected to the weighing device (4) and other measuring devices of the apparatus.
  • An object detector ( 19) is placed along the conveyor belt to detect objects to be weighed and transported along the belt Further a belt placement detector (8) is arranged for example underneath the belt path to located a starting point (12) of the 5
  • the electrical cabinet of the apparatus is indicated by a square box (21) underneath the computer data processing means ( 10).
  • Figure 3 shows a sectional view of the conveyor belt (3) and a weighing device (4) including a weighing platform (7).
  • the conveyor belt (3) is moved in the downstream direction ( 11) over the weighing platform (7).
  • the most preferable belt as shown on the figure is so called link-type belt.
  • An unlimited number of links (27) are connected together by nit-type joint (26). Each link is turnable around the joints.
  • other type of belt can be used.
  • Figure 4 shows the weighing diagram for a weighing unit with one weighing platform and a typical weighing curves for the platform as a single object is transported along the conveyor belt over the platform.
  • Fig. 5 is a sectional side view of one possible design of the conveyor belt guiding units ( 15, 18).
  • the weighing platform (7) is arranged traditionally as a part of the first guiding unit (15).
  • the conveyor belt (3) runs over a first roller ( 16) defining the input end (22) of the first conveying direction ( 1 1).
  • the belt runs further over the weighing platforms (7) being a part of the guiding unit ( 15) and then over the 6
  • the second roller ( 17) defining the output end (23) of the first horizontal conveying direction.
  • the roller ( 16, 17) does not necessarily need to be rotable but can be curve or semi-circular on the end so the belt slides easily over them.
  • the conveyor belt (3) is f.ex. driven by a toothed driving wheel (6) situated underneath the output end (23). The driving wheel pulls the conveyor belt (3) along the guiding unit ( 15) over the two rollers.
  • the second guiding unit ( 18) is situated underneath the first guiding unit (15) and supports the conveyor .belt (3) under its reverse conveyance from the output end (23) to the input end (22).
  • the second guiding unit (18) can be as long as, or of similar length as the first guiding unit ( 15) and thereby support the entire reverse conveyance of the belt, as shown on the figure. But it can also be shorter and/ or made of a number of shorter horizontal support structure and thereby support only partly the conveyor belt (3) under its reverse conveyance.
  • a second feature of the second guiding unit (18) can be to obtain a support-free section of the belt in-between the end of the guiding unit (18) and the roller (16) of the input end (22).
  • an identification device is placed on the belt for identification of an certain starting point.
  • the transporting speed of the conveyor belt can be measured.
  • the data processing means can without any complicated processing locate where the object is located on the.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Structure Of Belt Conveyors (AREA)

Abstract

L'invention concerne un procédé et un dispositif de pesée faisant appel à une unité de pesée de type transporteur. Le tapis roulant, formant une boucle sans fin, se déplace sur une première unité de guidage, définissant un premier sens de transport et s'étendant entre les faces supérieures de cylindres opposés. Le tapis roulant est entraîné rotatif et, dans son déplacement vers l'aval, passe au-dessus d'un dispositif de pesée. Le dispositif de pesée, faisant partie de la première unité de guidage, effectue la pesée des objets transportés par le transporteur. L'invention est caractérisée par une seconde unité de guidage définissant un sens inverse de transport. La seconde unité de guidage supporte le tapis roulant durant son déplacement en sens inverse et absorbe et/ou élimine ainsi les perturbations provoquées par les oscillations et autres forces appliquées au tapis.
PCT/IS1999/000001 1998-01-20 1999-01-20 Procede et dispositif de pesee WO1999036752A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU25439/99A AU2543999A (en) 1998-01-20 1999-01-20 Method and apparatus for weighing

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IS4655 1998-01-20
IS4655 1998-01-20

Publications (1)

Publication Number Publication Date
WO1999036752A1 true WO1999036752A1 (fr) 1999-07-22

Family

ID=36792796

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IS1999/000001 WO1999036752A1 (fr) 1998-01-20 1999-01-20 Procede et dispositif de pesee

Country Status (2)

Country Link
AU (1) AU2543999A (fr)
WO (1) WO1999036752A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003012380A1 (fr) * 2001-08-03 2003-02-13 Marel Hf. Appareil et procede permettant de commander la tension de courroie d'une bascule a courroie
BE1014687A3 (nl) * 2002-03-08 2004-03-02 Marelec Construct Nv Inrichting voor het automatisch op gewicht sorteren of wegen van voorwerpen op een transportband.
WO2004102135A1 (fr) * 2003-05-19 2004-11-25 Garvens Automation Gmbh Procédé et dispositif de pesée de produits

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3679010A (en) * 1970-08-10 1972-07-25 Tron Corp K Digitally controlled mass flow feeder and weight integrator
DE2531992A1 (de) * 1974-07-24 1976-02-05 Automatisme Cie Gle Wiege- und dosiergeraet mit einem transportband und verfahren zum zerlegen dieses geraets
FR2310553A1 (fr) * 1975-05-05 1976-12-03 Automatisme Cie Gle Dispositif d'acheminement et de pesage d'objets
US4134465A (en) * 1974-12-20 1979-01-16 Kubota, Ltd. Apparatus for measuring weight of bulk material conveyed by belt conveyor
EP0144497A1 (fr) * 1983-12-13 1985-06-19 Automatic Mechanical System Engineering Company Balance pour peser des produits en vrac
US5170857A (en) * 1990-10-04 1992-12-15 Cintex Of America Inc. Motorized weighing conveyor
EP0592349A1 (fr) * 1992-10-05 1994-04-13 Jesma-Matador A/S Dispositif pour pesage continu sur bande transporteuse

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3679010A (en) * 1970-08-10 1972-07-25 Tron Corp K Digitally controlled mass flow feeder and weight integrator
DE2531992A1 (de) * 1974-07-24 1976-02-05 Automatisme Cie Gle Wiege- und dosiergeraet mit einem transportband und verfahren zum zerlegen dieses geraets
US4134465A (en) * 1974-12-20 1979-01-16 Kubota, Ltd. Apparatus for measuring weight of bulk material conveyed by belt conveyor
FR2310553A1 (fr) * 1975-05-05 1976-12-03 Automatisme Cie Gle Dispositif d'acheminement et de pesage d'objets
EP0144497A1 (fr) * 1983-12-13 1985-06-19 Automatic Mechanical System Engineering Company Balance pour peser des produits en vrac
US5170857A (en) * 1990-10-04 1992-12-15 Cintex Of America Inc. Motorized weighing conveyor
EP0592349A1 (fr) * 1992-10-05 1994-04-13 Jesma-Matador A/S Dispositif pour pesage continu sur bande transporteuse

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003012380A1 (fr) * 2001-08-03 2003-02-13 Marel Hf. Appareil et procede permettant de commander la tension de courroie d'une bascule a courroie
US7015400B2 (en) 2001-08-03 2006-03-21 Marel Hf Apparatus and method for controlling the belt tension of a belt weigher
BE1014687A3 (nl) * 2002-03-08 2004-03-02 Marelec Construct Nv Inrichting voor het automatisch op gewicht sorteren of wegen van voorwerpen op een transportband.
ES2239501A1 (es) * 2002-03-08 2005-09-16 Marelec Construct Nv Dispositivo para clasificar segun el peso o pesar automaticamente objetos en una cinta transportadora.
ES2239501B1 (es) * 2002-03-08 2006-11-16 Marelec Construct Nv Dispositivo para clasificar segun el peso o pesar automaticamente objetos en una cinta transportadora.
WO2004102135A1 (fr) * 2003-05-19 2004-11-25 Garvens Automation Gmbh Procédé et dispositif de pesée de produits
US7405368B2 (en) 2003-05-19 2008-07-29 Mettler-Toledo Garvens Gmbh Method and device for weighing products

Also Published As

Publication number Publication date
AU2543999A (en) 1999-08-02

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