NO177411B - Sifting grid - Google Patents
Sifting grid Download PDFInfo
- Publication number
- NO177411B NO177411B NO932397A NO932397A NO177411B NO 177411 B NO177411 B NO 177411B NO 932397 A NO932397 A NO 932397A NO 932397 A NO932397 A NO 932397A NO 177411 B NO177411 B NO 177411B
- Authority
- NO
- Norway
- Prior art keywords
- rods
- accordance
- transverse bands
- fish
- grid
- Prior art date
Links
- 241000251468 Actinopterygii Species 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 6
- 239000004677 Nylon Substances 0.000 claims description 2
- 230000004927 fusion Effects 0.000 claims description 2
- 229920001778 nylon Polymers 0.000 claims description 2
- 239000004033 plastic Substances 0.000 claims description 2
- 229920000728 polyester Polymers 0.000 claims description 2
- 238000000926 separation method Methods 0.000 claims 2
- 210000000056 organ Anatomy 0.000 claims 1
- 238000009958 sewing Methods 0.000 claims 1
- 239000002759 woven fabric Substances 0.000 claims 1
- 230000006378 damage Effects 0.000 description 5
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 210000002816 gill Anatomy 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 230000035899 viability Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/80—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
- Y02A40/81—Aquaculture, e.g. of fish
Landscapes
- Thermistors And Varistors (AREA)
- Photoreceptors In Electrophotography (AREA)
Description
Foreliggende oppfinnelse angår ei skillerist for frasortering av levende småfisk, som angitt i den karakteriserende delen av patentkrav 1. Oppfinnelsen er primært beregnet for snurpenot og lagringsnot, men er også anvendeling ved snurrvad og trål. The present invention relates to a separator for sorting out live small fish, as stated in the characterizing part of patent claim 1. The invention is primarily intended for seine nets and storage nets, but is also applicable to seine seines and trawls.
Bakgrunn for oppfinnelsen Background for the invention
Det finnes i dag to typer utstyr for mekanisk sortering av fisk: There are currently two types of equipment for mechanical sorting of fish:
- Stive skillerister som hovedsakelig består av rør eller stenger. - Rigid dividers that mainly consist of pipes or rods.
- Sorteringsnett med oppbygning som ligner mye på notlin i fiskegarn Stive skillerister gir nøyaktig sortering, men er tunge og stive og kan ikke kjøres gjennom kraftblokk eller leggeruller. For å oppnå stor sorteringskapasitet er større ristareal nødvendig. Dermed blir de stive sorteringsristene for det første tunge og uhåndterlige, og for det andre farlige å håndtere i sjøgang. - Sorting nets with a structure that is very similar to notlin in fishing nets Rigid separator bars provide accurate sorting, but are heavy and rigid and cannot be driven through power blocks or laying rollers. To achieve a large sorting capacity, a larger grating area is required. As a result, the rigid sorting grids become, firstly, heavy and unwieldy, and secondly, dangerous to handle at sea.
Sorteringsnett har mange gode egenskaper når det gjelder håndtering, men har dårligere sorteringsnøyaktighet enn en stiv rist. Slike nett kan dessuten påføre fisken skade. Ved å bruke tykk og glatt tråd i sorteringsnettet kan risikoen for skade på fisken under sortering reduseres, men det vil fortsatt være en viss risiko for skade på fisk som akkurat slipper gjennom nettet. Sorting nets have many good properties when it comes to handling, but have poorer sorting accuracy than a rigid grid. Such nets can also cause damage to the fish. By using thick and smooth wire in the sorting net, the risk of damage to the fish during sorting can be reduced, but there will still be a certain risk of damage to fish that just slip through the net.
Under ugunstige omstendigheter kan fisken sette seg fast i maskene i sorteringsnettet, slik at sorteringen stopper helt opp. Under unfavorable circumstances, the fish can get stuck in the meshes in the sorting net, so that the sorting stops completely.
Oppfinnselsens formål Purpose of the invention
Det er derfor et formål med foreliggende oppfinnelse å framskaffe ei skillerist som ikke er beheftet med ulempene ved kjente anordninger. It is therefore an aim of the present invention to provide a dividing strip which is not affected by the disadvantages of known devices.
Oppfinnelsen The invention
Oppfinnelsens formål oppnås med ei skillerist med trekk som angitt i den karakteriserende delen av patentkrav 1. Ytterligere trekk vil framgå av de tilhørende uselvstendige krav. The object of the invention is achieved with a separator with features as stated in the characterizing part of patent claim 1. Further features will appear from the associated independent claims.
Med en anordning i samsvar med oppfinnelsen er det mulig å skille ut levende småfisk som enten er ulovlig å fange, eller er så små at de ikke er økonomisk With a device in accordance with the invention, it is possible to separate live small fish that are either illegal to catch, or are so small that they are not economically viable
interessant å ta vare på. interesting to take care of.
Frasorteringen skjer på en meget skånsom måte slik at den frasorterte fisken kan leve videre, praktisk talt uten skader som reduserer levendedyktigheten. Dette gir mulighet for en mer forsiktig beskatning av fiskeresurssene ved at en større andel småfisk overlever og kan vokse opp. The sorting takes place in a very gentle way so that the sorted fish can live on, practically without damage that reduces viability. This provides the opportunity for a more careful taxation of the fishing resources, as a greater proportion of small fish survive and can grow up.
Den fleksible skillerista er sammenfoldbar og bøyelig, slik at den kan håndteres sammen med redskapen og behandles av utstyr som kraftblokk og leggerull på tilsvarende måte som vanlige fiskeredskaper. The flexible dividing strip is foldable and pliable, so that it can be handled together with the gear and processed by equipment such as power blocks and laying rolls in a similar way to normal fishing gear.
Den fleksible skillerista har høy sorteringsnøyaktighet og behandlingen av fisken tilsvarende den som skjer ved bruk av ei stiv skillerist. Den har lav vekt, er lett å håndtere manuelt og den representerer praktisk talt ingen skaderisiko for fiskerne. Den har videre et beskjedent plassbehov på grunn av bøyeligheten og muligheten for sammenfolding. The flexible dividing strip has high sorting accuracy and the processing of the fish is similar to that which occurs when using a rigid separating strip. It has a low weight, is easy to handle manually and it represents practically no risk of injury to the fishermen. It also has a modest space requirement due to its flexibility and the possibility of folding.
Beskrivelse av en foretrukket utførelse Description of a preferred embodiment
Oppfinnelsen vil i det følgende beskrives ved hjelp av en foretrukket utførelse og med referanse til vedlagte tegninger, der The invention will be described in the following by means of a preferred embodiment and with reference to the attached drawings, where
fig. 1 viser et perspektivriss av ei skillerist i samsvar med foreliggende oppfinnelse, og fig. 1 shows a perspective view of a dividing strip in accordance with the present invention, and
fig. 2 viser et tverrsnitt av skillerista i fig. 1, tatt langs linja II-II. fig. 2 shows a cross-section of the dividing strip in fig. 1, taken along line II-II.
Ved først å referere til fig. 1 vises et perspektivriss av ei skillerist 1 i samsvar med foreliggende oppfinnelse. Rista 1 er bygd opp av langsgående rør eller stenger 2 som er bundet sammen av tversgående bånd 3. Mellom stengene 2 og båndene 3 dannes åpninger 4 som slipper gjennom fisk som er mindre enn en viss størrelse. Referring first to FIG. 1 shows a perspective view of a dividing strip 1 in accordance with the present invention. The grate 1 is made up of longitudinal tubes or bars 2 which are bound together by transverse bands 3. Between the bars 2 and the bands 3 openings 4 are formed which allow fish smaller than a certain size to pass through.
Stengene 2 er fortrinnsvis laget i et plastmateriale med stor bruddforlengelse, et foretrukket materiale er nylon. Stengene 2 har en stivhet som er avpasset slik at rista kan kjøres gjennom kraftblokk m.m, samt håndteres manuelt uten å skades eller få varige deformasjoner. The rods 2 are preferably made of a plastic material with a high elongation at break, a preferred material being nylon. The bars 2 have a stiffness that is adjusted so that the grate can be driven through power blocks etc., and handled manually without being damaged or suffering permanent deformations.
Tverrbåndene 3 er laget av et meget bøyelig og lett sammenfoldbart materiale, fortrinnsvis vevet polyesterbånd. Avstanden mellom tverrbåndene 3 er fortrinnsvis 4-7 ganger lysåpningen mellom de langsgående stengene 2. The transverse bands 3 are made of a very flexible and easily foldable material, preferably woven polyester band. The distance between the transverse bands 3 is preferably 4-7 times the light opening between the longitudinal bars 2.
Med i det følgende også å referere til fig. 2 vises et tverrsnitt gjennom to stenger 2 og et tverrbånd 3, 3', omfattende et øvre tverrbånd 3 og et nedre tverrbånd 3'. Øvre og nedre tverrbånd 3, 3' er bundet sammen med søm eller sammen-smelting 5, og er festet til stengene 2 slik at de ikke glir langs disse og den innbyrdes avstanden forandres. Stengerne/rørenes stivhet og avstanden mellom tverrbåndene er avpasset slik at det oppnås sorteringsnøyaktghet tilsvarende ei vanlig stiv skillerist. With in the following also referring to fig. 2 shows a cross section through two rods 2 and a cross band 3, 3', comprising an upper cross band 3 and a lower cross band 3'. The upper and lower crossbands 3, 3' are tied together with a seam or fusion 5, and are attached to the bars 2 so that they do not slide along them and the mutual distance changes. The stiffness of the rods/pipes and the distance between the crossbands are adjusted so that sorting accuracy is achieved corresponding to a normal rigid dividing grid.
Skillerista 1 kan anbringes stående eller liggende, avhengig av hvilke fiskeslag som skal sorteres. Når fisken går gjennom rista 1 vil den normalt bare berøre stengene 2 med sidene. Rygg- og bukfinner vil bare unntaksvis komme i kontakt med rista. Separator 1 can be placed vertically or horizontally, depending on which species of fish are to be sorted. When the fish passes through the grate 1, it will normally only touch the bars 2 with the sides. Dorsal and ventral fins will only exceptionally come into contact with the gills.
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NO932397A NO177411C (en) | 1993-07-01 | 1993-07-01 | Sifting grid |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NO932397A NO177411C (en) | 1993-07-01 | 1993-07-01 | Sifting grid |
Publications (4)
Publication Number | Publication Date |
---|---|
NO932397D0 NO932397D0 (en) | 1993-07-01 |
NO932397L NO932397L (en) | 1995-01-02 |
NO177411B true NO177411B (en) | 1995-06-06 |
NO177411C NO177411C (en) | 1995-09-13 |
Family
ID=19896223
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO932397A NO177411C (en) | 1993-07-01 | 1993-07-01 | Sifting grid |
Country Status (1)
Country | Link |
---|---|
NO (1) | NO177411C (en) |
-
1993
- 1993-07-01 NO NO932397A patent/NO177411C/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
NO932397D0 (en) | 1993-07-01 |
NO932397L (en) | 1995-01-02 |
NO177411C (en) | 1995-09-13 |
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MM1K | Lapsed by not paying the annual fees |