SE185539C1

SE185539C1 -

Info

Publication number: SE185539C1
Authority: SE
Publication date: 1963-01-01

Description

Uppfinnare: K Y T Bernhardsson Uppfinningen hfinfor sig till sadana tralar, vilkas med en ingangsoppning utformade huvuddel fir bildad av en ovre natdel, en nedre natdel och tvt sidonatdelar, som äró anslutna till ingangsoppningen omslutande kantlinor och till frau dessas anslutningspunkter vid Oppningens fyra horn till tralens strut forlOpande, langsgaende stodlinor. Tralen kan harvid framslapas med hjalp av tvâ dragfartyg (tvabatstral). eller med hj alp av ett enda fartyg (enbatstral). Vid kanda tralar av detta slag ha draglinorna varit anslutna till var sin framskjutande framat avsmalnande natarm eller natvinge bildad av tralnatets huvuddel vid vart och ett av ingangsOppningens fyra horn. Det har visat sig, att denna anordning är behaftad med betydande nackdelar. Genom dragningen i ingangsoppningens horn utovas en sadan dragverkan pa natmaskorna i zoner in mot struten, att dessa masker i stallet fOr att forbli ungefar kvadratiska dragas samman till en rombisk form med fran rat vinkel myeket avvikande vinklar. Detta medfor, att traloppningen minskas och darmed ocksa tralen& fangstkapacitet. Men hartill kommer, att genom tralnatets reducerade formaga att genomslappa vatten under tralens framslapning vattnet i viss man uppdammes framf8r struten och I viss man hindrar den I tralens huvuddel inkomna fisken att intrada i struten. Genom denna vattenuppdamning fA namligen de i tralens huvuddel inkomna fiskarna impulser, vilka medfora att en ej obetydlig mangd av dessa fiskar uttrada ur tralen. Inventor: KYT Bernhardsson The invention relates to such gratings, the main part of which is formed with an entrance opening and formed by an upper night part, a lower night part and two side night parts, which are connected to the entrance opening enveloping lines and to their connection points at the opening's four corners of the opening. forlOpande, longitudinal stodlinor. The trawl can then be towed forward with the help of two trawlers (two-boat trawl). or with the help of a single ship (single-jet). In the case of trawls of this type, the tow lines have been connected to their projecting forwardly tapering natarm or night wing formed by the main part of the trawl at each of the four horns of the entrance opening. It has been found that this device has significant drawbacks. By pulling in the horn of the entrance opening, such a pulling effect is exerted on the night meshes in zones towards the strut, that these masks, instead of remaining approximately square, are contracted into a rhombic shape with very different angles from a right angle. This means that the trawl opening is reduced and thus also the trawl & catch capacity. But in addition, due to the reduced ability of the trawl to allow water to pass through during the trawl's advancement, the water in some cases is dammed in front of the spout and in some cases the fish entering the main part of the trawl is prevented from entering the spout. Namely, through this water accumulation the fish entering the main part of the trawl receive impulses, which cause a not insignificant amount of these fish to emerge from the trawl.

Uppfinningen avser en anordning vid tralar av det angivna slaget, medelst vilken de angivna nackdelarna undgas och som fOljd darav tralen far en i overraskande grad Okad fangstkapacitet. Uppfinningen kannetecknas I huvudsak darav, att i de fyra natdelarna aro vid htirnen av trMens ingangsoppning och de till dessa hOrn anslutna andarna. av de langsgaende stodlinorna anordnade urtagningar, som framtill aro begransade av kantlinorna kring tridens ingangsoppning. Med fordel aro urtagningarna i huvudsak kilformiga med kilens spets belagen vid en punkt pa resp. langsgaende st8dlina. The invention relates to a device for trawls of the specified type, by means of which the stated disadvantages are avoided and as a result the trawl has a surprisingly increased catch capacity. The invention is mainly characterized by the fact that in the four night parts are at the corners of the entrance opening of the tree and the spirits connected to these horns. recesses arranged by the longitudinal guide lines, which at the front are bounded by the edge lines around the entrance opening of the trident. Advantageously, the recesses are mainly wedge-shaped with the tip of the wedge coated at a point on resp. longitudinal st8dlina.

Med pa detta salt utformade tralnat uppna.s, att natmaskorna i tralens huvuddel ej pa langt nAr bliva genom dragningen i draglinorna deformerade i samma grad som fOrut varit fallet, utan ingangstippningen, givetvis bortsett fran de relativt sma urtagningarna i hornen, far i huvudsak den onskade storleken. Natmaskorna hallas darvid utspanda sa, att de fa onskvard fOrmaga att genonaslappa vatten. Harigenom tikas vasentligt fiskfangskapaciteten, vartill kommer att tralen erbjuder mindre motstand mot framslappningen. With the trawl formed on this salt, it is achieved that the night meshes in the main part of the trawl are not far from being deformed by the drawing in the traction lines to the same extent as before, but the entrance tipping, of course apart from the relatively small recesses in the horns, desired size. The night worms are kept stretched out so that they are able to absorb water. This significantly reduces fish catching capacity, in addition to which the trawl offers less resistance to fishing.

Uppfinningen exemplifieras genom efterfoljande beskrivning av en utforingsform av tralen. Fig. 1 ar en schematisk vy av en enbatsflyttral och fig. 2 en liknande vy av en tvabatsflyttrM. Fig. 3 fir en sidovy och fig. 4 en frontvy av &Men i storre skala. Fig. 5 Or en planvy av ett hOrnparti air tralen utbrett i planet och i ytterligare storre skala. The invention is exemplified by the following description of an embodiment of the trolley. Fig. 1 is a schematic view of a single-bath float and Fig. 2 is a similar view of a two-bath float. Fig. 3 is a side view and Fig. 4 is a front view of & Men on a larger scale. Fig. 5 Is a plan view of a corner portion of the air trolley spread out in the plane and on an even larger scale.

Tralens huvuddel ar sammansatt av fyra balk avsmalnande, likadana natdelar, ramligen en takdel 10, en bottendel 11 och tva sidodelar 12, vilkas langsghende kanter aro forenade med langsgaende stodlinor 13, som Itipa bakat till och vid 30 aro forbundna med framkanten av strutens 14 ingangsOppning. Kanterna av ingangsoppningen till tralens huvuddel aro forstarkta av den tivre, ungefar horisontella kant- eller haddlinan 15, den nedre, ungefar horisontella kantlinan eller fotrubben 16 och de haddlinan och fotrubben forbindande sidokantlinorna 17. Dessa kantlinor aro vid tralens framre horn eller vingar 31 forenade med de langsgh.ende stodlinorna 13 vid punkterna 18. Till var och en av dessa fyra punkter ar en draglina anslu- 2— — ten, namligen en Ovre draglina 19 till var och en av de hada anslutningspunkterna 18 for haddlinan 15 och en nedre draglina 20 till var och en av de hada anslutningspunkterna 18 for fotrubben 16. The main part of the trawl is composed of four beams tapered, like night parts, preferably a roof part 10, a bottom part 11 and two side parts 12, the longitudinal edges of which are joined to longitudinal standing lines 13, which Itipa bakes up to and at 30 are connected to the leading edge of the strut 14 . The edges of the entrance opening to the main part of the trolley are reinforced by the tiver, approximately horizontal edge or headline 15, the lower, approximately horizontal edge line or foot ridge 16 and the headline and foot ridge connecting the side edges 17. These edges are joined at the front horn or wings 31 of the trolley 31. the longitudinal guide ropes 13 at the points 18. To each of these four points a tow line is connected 2— -, namely an upper tow line 19 to each of the had connection points 18 for the head rope 15 and a lower tow line 20. to each of the had connection points 18 for the foot rub 16.

Enligt uppfinningen ar vid vart och ett av hornen till tralens ingangsappning, de fyra tralens huvuddel bildande natstyckena 1012 forsedda med urtagningar 21, vilka i tralens normala arbetsstallning aro tva och tva belagna pa var sida av resp. langsgaende stothina 13. Kanterna av dessa urtagningar aro forstarkta med linor 22, vilka vid varje langsgaende stodlina 13 lopa samman vid en punkt 23. Urtagningen 21 pa varje sida om en lina 13 är i huvudsak kilformig med kilens ena sida bildad av en lina 13 och kilens andra sida av en lina 22. Kilens vinkel kan exempelvis: vara ungefar 10-°. Var och en av tralens fyra natdelar 10-12 bildar salunda vid tralens ingangsoppning en relativt bred flik 24, som vid ytterkanten är forbunden med tva narliggande stodlinor 13 resp. draglinor 19 eller 20 endast medelst en kantlina 15, 16 eller 17. According to the invention, at each of the horns of the entrance opening of the trawl, the main pieces 1012 forming the main part of the trawl are provided with recesses 21, which in the normal working position of the trawl are two and two covered on each side of resp. longitudinal stothina 13. The edges of these recesses are reinforced with ropes 22, which at each longitudinal standing line 13 run together at a point 23. The recess 21 on each side of a rope 13 is substantially wedge-shaped with one side of the wedge formed by a rope 13 and the other side of the wedge of a rope 22. The angle of the wedge can, for example: be approximately 10- °. Each of the four night parts 10-12 of the trawl thus forms at the entrance opening of the trawl a relatively wide flap 24, which at the outer edge is connected to two adjacent standing lines 13 and tow lines 19 or 20 only by means of an edge line 15, 16 or 17.

I en med tralens lingdaxel parallell projektion komma i tralens arbetsstallning punkterna 18 att approximativt befinna sig i hornen av en kvadrat. Avstandet mellan tva punkter 18 och 23 vid ett och samma tralhorn kan variera men kan vara ungefar melIan 10-25 % av resp. linas 13 langd frau_ punkten 18 till punkten 30 vid ingangen till struten 14. In a projection parallel to the longitudinal axis of the trawl, the points 18 in the working position of the trawl come to be approximately in the corners of a square. The distance between two points 18 and 23 at one and the same tralhorn can vary but can be approximately between 10-25% of resp. line 13 length frau_ point 18 to point 30 at the entrance to the cone 14.

Pa vanligt sat aro till haddlinan 15 anslutna ett antal flottorer 25. Vidare är struten 14 forbunden med haddlinan 15 medelst en sakerhetslina 26. Pa kant satt aro ocksh till de nedre draglinorna 20 anslutna tralbord 27 (fig. 1) eller vikter 28 (fig. 2). De iivre draglinorna 19 kunna antingen framfOr tralborden 27 vid punkter 28 vara fiirbundna med de nedre draglinorna 20, sour lopa till en vinschanordning pa ett enda dragfartyg, sasom visas i fig. 1, eller ocksâ kunna en byre och en nedre draglina 19, 20 vara anslutna till en vinschanordning pa ett dragfartyg och de bada andra draglinorna vara forbundna riled en vinschanordning pa ett andra dragfartyg, sasom visat i fig. 2. Usually a number of floats 25 are connected to the headline 15. Furthermore, the strut 14 is connected to the headline 15 by means of a safety line 26. On the edge were also trolley boards 27 (fig. 1) or weights 28 (fig. 28) connected to the lower tow lines 20 (fig. 2). The upper tow lines 19 can either be connected in front of the trolley boards 27 at points 28 to the lower tow lines 20, sour loop to a winch device on a single tow vessel, as shown in Fig. 1, or also a barge and a lower tow line 19, 20 can be connected to a winch device on a towing vessel and the two other towing lines being connected to a winch device on a second towing vessel, as shown in Fig. 2.

Det har vid forsok visat sig, att urtagningarna 21 i tralens framre horn eller vingar forebygga joke onskvard forlangning av traldelarnas 10-12 natmaskor i med de langsgaende stodlinorna 13 parallell riktning till foljd av dragningen I draglinorna 19, 20. Maskornas farm under tralens arbete kernmer salunda ej att i nagon skadlig man av vika frail den normala kvadratiska. Detta har till fiiljd, att vattnet vid sin genomstromning genom tralen moter mindre mot-stand On vad tidigare varit fallet och att det i tralens huvuddel 10-12 ej uppkommer flagon markbar tryckvag riktad framat mot tralens ingangsOppning. P0. grund harav far den nya tralen en i mycket hog grad okad ffingstkapacitet, och dessutom kommer den behovliga dragkraften for tralens framslapning att reduceras. Detta har ()aka. fOrdelaktiga tekniska och ekonomiska verkningar for den vid tralfisket anvanda materielen. Experiments have shown that the recesses 21 in the front horns or wings of the trawl prevent joking demand of the trawl parts 10-12 night meshes in the direction of the trawl lines 13 in parallel direction as a result of the traction in the trawl lines 19, 20. The mesh farm during the work of the trawl salunda not that in any harmful man of fold frail the normal square. This has the consequence that the water, when flowing through the trawl, meets less resistance than has previously been the case and that in the main part 10-12 of the trawl there is no noticeable pressure wave directed towards the entrance opening of the trawl. P0. Due to this, the new trawl has a very high fishing capacity, and in addition the necessary traction force for the trawl's advance will be reduced. This has () aka. Beneficial technical and economic effects for the equipment used in trawling.

Uppfinningen ar givetvis icke begransad till den ovan med hanvisning till ritningen beskrivna utforingsformen. Exempelvis kunna ocksa de ovre draglinorna vara farsedda med tralbord. The invention is of course not limited to the embodiment described above with reference to the drawing. For example, the upper tow lines can also be fitted with trolley tables.

Claims

Patent claim:

1. Device at a trolley, the main part of which is formed with an entrance opening and is formed by an upper night part, a lower night part and two side night parts, which are connected to the entrance opening enclosing curbs and to their connection points at the four horns of the opening extending longitudinally. ,. can be characterized by the fact that in the four night parts (10-12) there are at the corners of the entrance opening of the trolley and the spirits connected to these horns of the longitudinal standing lines (13) arranged recesses (21), which are at the front bounded by the curbs (15). -17) around the entrance opening of the trolley.

Device according to patent claim 1, characterized in that the recesses (21) are substantially wedge-shaped with the tip of the wedge coated at a point (23) pa. resp. longitudinal standing line (13).

Device according to patent claim 1 or 2, characterized in that the recesses (21) extend along approximately 10-25% of the length of resp. longitudinal standing line, drawn from the junction of this line with the corresponding curbs (15-17) around the entrance opening of the trolley and the connecting point (30) of the longitudinal standing line in question - yid the edge of the entrance opening to the strut (14). Request publications: