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WO2005105330A2 - Procede et dispositif de traitement, de parage et/ou de calibrage - Google Patents

Procede et dispositif de traitement, de parage et/ou de calibrage Download PDF

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Publication number
WO2005105330A2
WO2005105330A2 PCT/IS2005/000010 IS2005000010W WO2005105330A2 WO 2005105330 A2 WO2005105330 A2 WO 2005105330A2 IS 2005000010 W IS2005000010 W IS 2005000010W WO 2005105330 A2 WO2005105330 A2 WO 2005105330A2
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WO
WIPO (PCT)
Prior art keywords
objects
workstation
processing
grading
scales
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.)
Ceased
Application number
PCT/IS2005/000010
Other languages
English (en)
Other versions
WO2005105330A3 (fr
Inventor
Ingolfur Arnason
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.)
Skaginn hf
Original Assignee
Skaginn 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 Skaginn hf filed Critical Skaginn hf
Publication of WO2005105330A2 publication Critical patent/WO2005105330A2/fr
Publication of WO2005105330A3 publication Critical patent/WO2005105330A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
    • B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
    • B07C5/16—Sorting according to weight
    • B07C5/22—Sorting according to weight using a plurality of stationary weighing mechanisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
    • B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
    • B07C5/16—Sorting according to weight
    • B07C5/28—Sorting according to weight using electrical control means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
    • B07C7/00—Sorting by hand only e.g. of mail

Definitions

  • the invention relates to a method, system and apparatus for processing, trimming and grading of products such as fish fillets, meat pieces, chicken parts, shrimps etc.
  • This new method consists of weighing each individual piece of product at each workstation on a static scale, feeding the information into a central control system. The information is then used to collect and grade the products into portions on a collecting conveyor and the portions are thereafter loaded of the conveyor into product containers.
  • a common method uses a special collecting conveyor, which has identification tags placed on the conveyor belt and the distance between the identification tags on the belt is known. The distance between the identification tags is adjusted to the size of the products/objects being processed.
  • a control system detects the identification tags on the collecting conveyor and the products form the workstations are delivered onto the conveyor belt in the spaces between the tags. Each object is therefore separated in the flow and can be weighted individually on a dynamic scale. The objects are thereafter guided to a grading apparatus, which collects the objects into desired containers. This method allows precise monitoring of individual output and efficiency during processing.
  • a further limitation related to conventional methods relates to graders that use push-off/pull-off gates, as the objects are graded one by one and the reaction time of the gates is a limiting factor. Therefore, the output is limited by the object spacing and the grading conveyor speed.
  • Conventional processing and grading devices take up a lot of space, as it is necessary to place a dynamic scale within the processing line for weighing one object at the time.
  • the objective of the present invention to provide a method and apparatus for processing, trimming and grading objects with increased capacity and precision to overcome limitations of current grading methods and devices. This opens up the possibility to design a device, which takes up less space and can therefore be used where conventional devices would not fit. Implementations of the current invention can further be adapted for other diverse applications in industry such as grading products, which require delicate handling during grading or processing (shrimps or poultry pieces), into many categories from a single workstation.
  • the invention in the first aspect of the present invention relates to a method for processing and grading objects from at least one workstation.
  • the method comprises conveying objects on an in-feeding conveyor belt to the workstation, processing objects and weighing the objects on static scales at the workstation.
  • the objects are ejected from the scales to defined areas on the collecting conveyor.
  • the areas on the collecting conveyor are defined such that an area exists for each object category and/or weight categories within each object category.
  • the collecting conveyor may operate jointly with a grading unit allowing the objects to be graded directly from the defined areas on a collecting conveyor.
  • the method of the present invention allows for grading of one or more object categories in one process.
  • a system for processing and grading objects from at least one workstation.
  • the system comprises in- feeding means, which delivers the objects to the workstations.
  • Each workstation comprises one or more weighing means for weighing the objects after processing.
  • the objects are delivered to a collecting means, which further delivers the objects to a grading means.
  • the system further comprises identification tags for defining areas on the collecting conveyor belt and detectors for detecting signals from the identification tags.
  • Computing means collects data from detectors for processing and storing information regarding the objects on the processing line.
  • the system of the invention allows for several object categories to be processed, trimmed and graded simultaneously in one process.
  • the grading of the objects is based on type, size and or weight of object.
  • the in-feeding means of the invention are in the present context object containers on conveyor belts, which deliver objects from the in-feeding container onto in- feeding conveyor belts, which further transport the objects to the workstations.
  • the in-feeding means deliver objects to the workstations, where the worker takes an object for processing and/or weighing.
  • Each workstation is positioned at the processing line along the collecting conveyor.
  • the workstation comprises a platform, which the worker stands or sits on.
  • the height of the platform is adjustable in order for the worker to be in an ergonomically favorable position in relation to the surface of working area at the workstation.
  • the workstation is equipped with diverse devices suitable for the processing of different products. Therefore, the working area for processing fish fillets may comprise a semi-transparent plate lit up from below in order to see damage, bones or parasites in the meet.
  • a stand may be placed on the surface of the working area to hold the chicken stable while removing the various parts from the chicken.
  • the working area is designed so that when the worker places the object on a scale at the workstation for weighing and grading, the worker is able to take a new object from the in-feeding unit in the same movement.
  • Each workstation may also comprise a monitor delivering information regarding the object to the worker.
  • the workstations further comprise a detector, which detects the presence and identity the worker performing the work at the workstation each time.
  • the worker signs in at each workstation by bringing an identification tag towards the detector, which identifies and registers the presence of the worker.
  • the worker is thereby identified by a control system and the control system can calculate output and efficiency of each worker.
  • the weighing means of the invention are at least one scale.
  • the scale(s) are placed in a line in front of the worker at the workstation, between the processing area of the workstation and the collecting conveyor belt.
  • the scales of the invention are static scales, comprising an evacuation mechanism.
  • the number of scales at each workstation relates to the number of object categories to be processed on the processing line.
  • Each scale at a given workstation is assigned to one object category in order for the control system to grade the objects and monitor the processing continuously. Therefore, all objects of a given object category are weighed on one scale specific for that particular object category.
  • monitors may be placed in front of each worker at the workstations displaying the weight information. Therefore, the worker can monitor his own work and make corrections if needed.
  • the collecting conveyor of the invention is continuous conveyor belt, wherein the length of the belt is adjusted according to the number of workstations on the processing line and the type and size of the grading unit.
  • Separate areas are defined on the collecting conveyor by placing identification tags (ID tags) on the belt of the collecting conveyor with a pre-determined distance between the tags.
  • ID tags identification tags
  • the definition of areas on the collecting conveyor allows the defined areas to receive objects from a certain object category and/or weight category within each object category and the system allows for a predefined maximum number of objects to be set for ejection onto each area.
  • Detectors are positioned along the collecting conveyor of the processing line for detecting signals form the identification tags on the collection means.
  • a control system comprising computing means, detectors at workstations and along the processing line, strain gauges of the scales and identification tags on the conveyor belt and workers.
  • the computing means which in the present context is an industrial computer, receives data from identification detectors, scales and identification tags on the collection means. The collection of data starts as the objects enter the processing line.
  • the computer stores and processes the incoming data and based on the information it receives, it maintains an overall control of the processing- line.
  • the computing means monitors efficiency, output and precision from each workstation and thereby, information regarding the work being done on the processing line can be stored in a database for and used for improvement, trouble shooting or any benchmarking for work performed at the processing line.
  • the computing means further allow for objects to be traced through the whole processing period.
  • the computing means of the invention is a computer and preferably an industrial computer.
  • in one process relates to a process in which an object is processed into smaller units, weighted and graded.
  • an apparatus for processing and grading objects.
  • the apparatus comprises a frame for supporting the components of the workstation, such as conveyors, scales, processing area etc.
  • the apparatus further comprises at least one workstation, at least one conveyor means for moving objects to at least one workstation, scales positioned at each workstation, a collecting conveyor and a computer for processing and storing information from the processing line.
  • each workstation comprises an identification detector for identifying each worker as the worker attends to the workstation for processing.
  • Each workstation further comprises a standing or sitting platform, which is adjustable according to the height of the worker. Thereby, the worker can always be in the ergonomically best position during processing.
  • the at least one workstation further comprises a monitor placed in front of the worker. The monitor delivers information regarding the object being processed, such as the weight of the object the worker has placed on certain scale and the object category, provided that each scale at a certain workstation is specific for each object category.
  • the scales are static scales comprising an evacuation mechanism.
  • the scales of the invention are static scales, which are provided with an output for delivering information regarding the products weighted to the control system.
  • Electronic scales are constructed from several parts one of them being strain gauges, which convert weight forces into digital information for calculating the weight of objects. Conventional systems use flow scales, but such strain gauges are relatively inexpensive devices, which makes the system of the current invention cost efficient.
  • the method relates to using static scales for weighing all objects delivered to each workstation.
  • the weight information is stored and processed by an industrial computer and therefore information related to each object entering the processing-line is registered in the control system. This information is then used to place each object in a correct object category and weight category on a collecting conveyor.
  • objects can be collected in object categories on defined areas on the collecting conveyor belt and when a desired number and/or weight of objects has been reached in the defined area, the object category is evacuated from the collecting conveyor belt to an intergraded collection/grading unit.
  • the areas on collecting conveyor belt are defined so that each area is designated for a certain type and weight of objects
  • the collecting conveyor comprises a continuous conveyor belt and identification tags placed on the belt of the conveyor define areas on the belt.
  • the areas are designated by the control system to receive products from certain object category(ies) only.
  • the system/apparatus of the present invention further comprises detectors for detecting signals form the identification tags on the collection means.
  • the objects to be processed and graded are selected from the group comprising, but not limited to; fish, fish-fillets, poultry, poultry-pieces, shellfish, large shrimps, meat pieces.
  • the grading of the objects is based on type, size and or weight of object.
  • the method or system or apparatus is used grade delicate objects such as large farmed-shrimps or similar objects.
  • the worker continuously places the object on a scale specific for that object category and by ejecting the object from the scale onto the collecting conveyor belt when the designated area passes by the scale, the system sorts the objects to designated areas on the collecting conveyor belt.
  • Each chamber of the grading unit is then designated to receive objects from one object category and/or within one certain weight category.
  • the number of object categories relates to the number of scales at each workstation.
  • An object that belongs in a certain object category is therefore weighted at a defined scale and the information delivered to the control system therefore contains both the weight of the object as well as the object category.
  • all objects can be collected to the collecting conveyor at predefined areas as opposed to current methods where the objects need to be separated, weighted graded one by one.
  • Several objects based on weight and/or number are thereby collected to defined areas on the collecting conveyor belt resulting in an increased output and the output can by further increased by the size of the collecting conveyor belt and the area availability of the defined areas on the belt.
  • the method provides combining a certain number of objects into predetermined batches based on weight and/or number.
  • Each area on the collecting conveyor can receive objects from one or more workstations and thereby objects can be selectively placed in a certain area on the collecting conveyor where the object best fulfills the criteria of desired batch.
  • the selection of objects into batches is performed by predetermining the final weight of each receiving unit (fixed weight weighing system).
  • the control system selects objects for a particular batch based on desired final weight of each batch.
  • the combination of products into batches is based on that each area on the collecting conveyor starts its route at the first workstation. This area then receives objects that fulfill the criteria set for the area and rejects objects that do not fulfill the desired criteria.
  • the combination of products into batches is based on collecting objects into object categories, where each object category has a defined area on the collecting conveyor belt.
  • objects are collected into batches of a certain weight below the desired final weight of the batch and then in a second round of the belt, objects are added to the areas where the best fulfill the weight criteria of each object category.
  • control system comprises an industrial computer receiving and processing signals from detectors at workstations and processing line as well as strain gauges of each.
  • the system is then programmed for a maximum number of objects to be ejected to each area in order to prevent the areas to overfill and resulting in objects migrating over to other areas.
  • Figure 1 shows a perspective overview of the processing line and a grading unit.
  • Figure 2 shows a top view and a side view of a processing line and a grading unit.
  • Figure 3 outlines the process for weighing and grading.
  • Figure 4 shows an overview of workstations and grading units.
  • Figure 5 shows an overview of defined areas for objects and one type of weighing means.
  • FIGS 1 and 2 outline the main features of the invention showing an in-feeding means (1) delivering objects to processing line (2).
  • the in-feeding means may be in-feeding containers (5) on conveyor belts (6) which deliver objects from the in- feeding container (5) onto in-feeding conveyor belts (7), which further transport the objects to the workstations (8).
  • the objects are transported from the processing line over to a grading unit (3), by a collecting conveyor (15), which operates jointly with the grading unit (3).
  • the grading unit (3) empties the objects collected in the chambers (21-24) of the grader (3) onto an output conveyor (4).
  • the output conveyor may then deliver the processed and graded objects to packing unit, which is not shown in the drawing nor described in further detail.
  • FIG. 3 shows the belt of the collecting conveyor (15).
  • the conveyor belt is continuous and the length of the belt is adjusted according to the number of workstations (8) and the size of the grading unit (3).
  • the collecting conveyor belt is divided into a number of defined separate areas (19) by placing identification tags (17) onto the collecting conveyor belt with a pre-determined distance between the tags.
  • a detector (18) identifies the tags, and as the number and placement of the tags is known, the control system defines the areas on the collecting conveyor belt. Each area ⁇ n the belt is defined by the system to receive one object category with objects (10) within a certain range of weight.
  • the objects from a certain category are eject from the scales to the object category on the collecting conveyor. Therefore the one of the areas is defined to receive f.ex. neck-pieces from all scales carrying pieces belonging to this category weighing between 80-90 grams, whiereas the next defined area receives neckpieces weighing between 91 and 12D grams.
  • the scales are dynamic static scales, where each scale is spiecific for one object category.
  • the scales may comprise trays (26) resting on strain gauges (16), which sends digital information to the control system with informatilon regarding the weight of the object.
  • the control system registers the weight information together with the category of which the object belongs to, provided that a certain scale is always used for weighing objects from one category only.
  • the scales are further built on fastening means, which rotate around an axis (25).
  • the axis is turned 180° by a stepper motor, which enables a controlled, rapid and efficient ejection of objects from the scale onto the collecting conveyor.
  • Each scale is connected to a separate step motor and comprises a separate ejection means as all the scales at each workstation operate individually.
  • the scale can also comprise a drum shaft motor with a step function (27) as shown in figure 5.
  • the drum shaft is divided into three areas, each forming a weight container. This allows better control of ejecting objects from the scales as well as increased weighing speed and gentle ejection as the stepper motor can be easily controlled very accurately.
  • the workers register at a workstation (8) by bringing an identification tag towards a detector (9), which are shown in figure 4. This way both the presence and identity of each worker is registered and this information may be transmitted to the central control system. As each worker is thereby identified by the system through the control system, the computing means can calculate output and efficiency of each worker.
  • the workers stand at workstations (8) on platforms with adjustable height in order for the worker to be in an ergonomically favorable position in relation to the table at the workstation.
  • the workstation may be equipped with diverse devices suitable for the processing each time. Therefore when processing fish fillets, the table at the workstation may be semi-transparent plate lit up from below in and when parting chickens a holder may be placed on the plate to hold the chicken while parting it.
  • the scales (11-14) are placed in a line in front of the worker at the workstation. Monitors may be placed in front of each worker at the workstations displaying the weight information. Therefore, the worker can monitor his own work and make corrections if needed.
  • the processing may involve separation of a fish fillet into smaller pieces, where the neck-piece is placed on scale (11), tail-piece on scale (12), flaps on scale (13) and waste on scale (14).
  • Another example may be processing of chickens into larger pieces, where wings are placed on scale (11), legs on scale (12), breasts on scale (13) and waste on scale (14).
  • Figure 5 demonstrates how object categories A1-A3 and B1-B3 (28 - 34) are organized, so that f.ex object category Al is ejected onto the first area, category A2 onto the next are and category A3 the next one and so on.
  • the areas which have not been assigned to a specific categories will later be assigned a new category like shown with area Al (34), which will be assigned to category Al, but the order and number of categories on defined on the belt may be as most convenient for each project.
  • Categories A1-A3 may here demonstrate an object in three weight categories such as neck-pieces weighing 80-90 grams, 91-120 grams and 121-150 grams.
  • objects B1-B3 may be tail-pieces in 3 different weight categories.
  • the number of object categories and weight categories within each object category are defined by needs and are only limited by the size of the collecting conveyor selected for each system.
  • the belt of the collecting conveyor is continuous and operates jointly with the grading unit (3).
  • the gates (20) of the grading unit (3) sweep the objects of the areas (19) in the collection chambers (21-24), which may f.ex. be defined so that chamber (21) receives category Al, chamber 22 receives category A2 etc.
  • the control system comprises the identification tags on the conveyor belt, the detectors at each workstation, detectors along the collecting conveyor, strain gauges of the static scales and an industrial computer, which controls the processing line and manages the whole system as well as performing all data processing.
  • the collection of data starts at the workstations as the worker takes his/hers place at the workstation.
  • the system collects weight information for each object as it enters the processing line. Thereby, each object can be traced throughout the whole process and accurate filing and output and efficiency of the processing can be monitored during the processing and grading.
  • the system defines the new areas on the collecting conveyor belt, defines the maximum number of objects allowed for each area and defines the area for a new object category when the objects have been collected into one of the chambers of the grading unit.

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  • Sorting Of Articles (AREA)
  • Processing Of Meat And Fish (AREA)

Abstract

L'invention concerne un procédé, un système et un dispositif de traitement, de parage et de calibrage de produits tels que des filets de poisson en une seule passe. Les objets sont acheminés vers un poste de travail via une bande transporteuse d'alimentation sur laquelle ils sont traités et pesés sur des balances statiques. Ces objets sont ensuite éjectés des balances vers des zones prédéfinies d'une bande transporteuse collectrice, ces zones correspondant à chaque catégorie d'objets. La bande transporteuse collectrice peut coopérer avec une unité de calibrage de sorte que les objets peuvent être calibrés directement à partir des zones prédéfinies sur une bande transporteuse collectrice. Ce procédé assure le calibrage d'une ou de plusieurs catégories d'objets en une seule passe.
PCT/IS2005/000010 2004-04-30 2005-04-29 Procede et dispositif de traitement, de parage et/ou de calibrage Ceased WO2005105330A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IS7247 2004-04-30
IS7247 2004-04-30

Publications (2)

Publication Number Publication Date
WO2005105330A2 true WO2005105330A2 (fr) 2005-11-10
WO2005105330A3 WO2005105330A3 (fr) 2006-01-05

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019175678A1 (fr) * 2018-03-13 2019-09-19 Linco Food Systems A/S Appareil et procédé de calibrage à pesée statique
CN110871980A (zh) * 2018-08-29 2020-03-10 天津京东深拓机器人科技有限公司 储位分类方法和装置
US10750753B2 (en) 2016-12-16 2020-08-25 Marel Iceland Ehf Flowline system and a method for processing food products

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4219120A (en) * 1977-08-11 1980-08-26 Alpo Rysti Method and apparatus for handling both green and dried timber lengths
EP1097095A1 (fr) * 1998-07-10 2001-05-09 Crisplant A/S Transporteur
GB2358478B (en) * 1998-10-15 2003-01-08 Scanvaegt Int As Method and apparatus for batching-out items such as poultry pieces

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10750753B2 (en) 2016-12-16 2020-08-25 Marel Iceland Ehf Flowline system and a method for processing food products
WO2019175678A1 (fr) * 2018-03-13 2019-09-19 Linco Food Systems A/S Appareil et procédé de calibrage à pesée statique
CN110871980A (zh) * 2018-08-29 2020-03-10 天津京东深拓机器人科技有限公司 储位分类方法和装置
CN110871980B (zh) * 2018-08-29 2023-05-02 北京京东乾石科技有限公司 储位分类方法和装置

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