Classifications

• • A—HUMAN NECESSITIES
  • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
  • A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
  • A01K74/00—Other catching nets or the like

Definitions

• the object of the invention is the perimeter frame for a net, which is essentially circular in shape at its upper edge and used for fishing. More precisely, the object is the joint part whereby the perimeter frame is joined and hinged so that the perimeter frame, and at the same time the entire net, can be folded into a smaller size to facilitate transportation, for example.
• Circular conical in shape nets of this manner embodying a perimeter frame and opening upwards are in use and include a wide variety of sizes.
• the biggest nets of this kind are in use in the fishing vessels in which the catch is lifted with the help of a crane directly into the hold of the vessel using nets, whose diameter is several metres.
• the smallest nets of this kind are meant to be used manually in fishing and they are light in structure and their diameters can be even less than one metre.
• a known-art solution is to form the perimeter frame from two semicircular parts, which are joined to each other by means of links at the ends of arcs. Thereby it is possible to fold the circular frame to collapse it by turning the halves against one another. Thus folded the net takes up the space required by the resultant semicircle. From the point of view of transporting the net, it is of essential importance that the frame can be formed to take up less room when the net is not in actual use.
• the purpose of the present invention is to eliminate the problems presented in the above and to produce such a solution for net frame as will enable the user to readily form the net to take up less room, e.g. during transport of the net.
• the solution in accordance with the invention enables the user to fold the net frame with ease into such a form as takes up considerably less room. Furthermore, it is simple to make, operationally reliable and inexpensive to manufacture.
• Figure 1 illustrates the net in accordance with the invention as seen from the side
• Figure 2 illustrates an enlarged cross-sectional view of the joint part as shown in Figure 1;
• Figure 3 illustrates another advantageous execution of the joint part shown in Figure 1 as a cross- sectional view
• Figure 4 illustrates the folding together of the perimeter frame.
• Figure 1 shows a direct side view of the fishing net 1 in accordance with the invention, the said net having a perimeter frame 2, an actual circular cone shaped net part 3, which opens upwards and is attached to hang from the perimeter frame.
• implements 4 for moving the net 1 are fastened to the perimeter frame 2 when it is open.
• These implements 4 can be, for example, strings, ropes, wire ropes, chains etc., depending on the size of the net 1 and its weight together with the possible catch.
• the implements 4 have been advantageously connected from their other end to net 1 and at the same time to the perimeter frame 2 at the point 5, which is located above the centre point of perimeter frame 2.
• the perimeter frame 2 is also provided with joint part 6, whose advantageous forms of execution are clarified in more detail in following Figures 2 and 3.
• the purpose of the joint part 6 is to connect the perimeter frame 2 to form an integrated circular structure by keeping the ends of the perimeter frame close to one another. Its second task is concurrently to enable the rotation along their longitudinal axes of the opposite ends of perimeter frame 2 at the joining point. Thanks to this rotation movement, there are no cutting tensions affecting the perimeter frame 2 and folding the perimeter frame first to take the shape of the figure eight and then to form two loops one on top of the other can be done with ease and using hardly any force at all.
• Figure 2 shows an enlarged cross-sectional view of an advantageous execution of the joint part 6.
• Sleeve 7 serves as the body of the joint part 6.
• the perimeter frame 2 is advantageously made of spring steel, e.g. round in cross section, Both ends 8 of the perimeter frame 2, which are provided with threads 9 to receive the nuts 10, have been passed through sleeves 11 before installing the nuts on the threads.
• a dashed line depicts the joint between the threads 9 of the perimeter frame 2 and the nuts 10.
• the outside diameter Dl of sleeve 11 is a little bigger than the inside diameter D2 of sleeve 7, whereupon when the sleeve 11 is forced inside sleeve 7 a friction joint is formed between the sleeves and this keeps the sleeves such that one is inside the other.
• Sleeves 7 and 11 can be of either metal or plastic.
• An example of one advantageous alternative is to manufacture sleeve 7 of aluminium and sleeve 11 of plastic, whereupon it becomes easy to press the plastic sleeves 11 inside sleeve 7, and at the same time the plastic sleeves 11 do not cause wearing of the perimeter frame 2.
• the diameter D3 of the perimeter frame 2 is a little smaller than the inside diameter D4 of the sleeves 11, whereupon the inside surfaces 12 of sleeves will serve as sliding contact bearing surface/guide bearing for the perimeter frame when the perimeter frame is folded to collapse it or unfolded to be ready for use after transportation.
• diameters Dl and D2 and D3 and D4 in Figure 2 are shown using just one figure.
• the ends 8 of the perimeter frame 2 are caused to rotate at the joint point along their longitudinal axes 13 in relation to one another in the manner shown by the halves 14.
• the nuts 10 are dimensioned to be smaller in outside diameter than the inside diameter D2 of the sleeve 7 so that they can freely rotate inside sleeve 7.
• the nuts 10 can also be locked into places using some as such known-art technique.
• the sleeve 7 can, for example, be made of plastic tube 8 mm in outside diameter with a wall thickness of 1 mm.
• the sleeves 11 can then be made of plastic tube with an outside diameter Dl of 6,3 mm and an inside diameter D4 of 3 mm.
• the sleeves 11 are 0.3 mm oversize in regard to their outside diameter of Dl, and this enables a firm friction joint to be achieved between the sleeve 7 and the sleeves 11.
• a total clearance of 0.2 mm is achieved, which is sufficient from the point of view of the desired function.
• FIG. 3 shows a cross-sectional presentation of another application form of joint part 6.
• the ends 8 of the perimeter frame 2 installed through sleeves 11 have been bent to an angle of 90° in relation to the longitudinal axis 13 of the perimeter frame 2.
• the angle of bending can be any angle between approximately 45° and 180°. This prevents the perimeter frame in 2 from moving longitudinally through the sleeves 11.
• Sleeve 7 can also be provided with a spacer plate 15 preventing contact between the ends 8 of the perimeter frame 2.
• Figure 4 shows the folding of the perimeter frame 2 to collapse it.
• Perimeter frame 2 is first folded to form the figure eight and after that the loops of the figure eight are folded one on top of the other as indicated by the arrow 16. In this way the perimeter frame 2 is made to take up little space. Where necessary, folding can be executed to form three or more overlapping circles. Then the only limiting factors are provided by the flexibility of the material of the perimeter frame 2 and the increasing force needed to implement further folding.
• a solution similar to the invention is provided by perimeter frames 0.5-2 metres in diameter, whose handling is easy to accomplish manually. This solution is particularly advantageous with the diameter being between 0.8-1.5 metres.

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• Life Sciences & Earth Sciences (AREA)
• Environmental Sciences (AREA)
• Animal Husbandry (AREA)
• Biodiversity & Conservation Biology (AREA)

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Cited By (1)

Citations (4)

• 2003
  • 2003-01-20 FI FI20030081A patent/FI115377B/fi active IP Right Grant
• 2004
  • 2004-01-19 WO PCT/FI2004/000025 patent/WO2004064507A1/en active Application Filing

Patent Citations (4)

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