DE1239957B - Device for launching and hauling in the net as well as for hauling up the catch on fishing vessels without a towing incision - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. Cl .:

B 63 b

German class: 65 al - 2

Number: 1 239 957

File number: B 74469 XI / 65 al

Filing date: November 30, 1963

Open date: May 3, 1967

The invention relates to a device for suspending and retrieving the net and for retrieving the Catch on the deck of fishing vessels without a towing incision in the form of a folding boom serves as a tow.

The use of a tow on stern trawlers resulted in great savings in time the previous practice of laboriously dividing the catch for hauling up on deck in the stert. Especially this one Fact had regardless of the additional costs for the incision in the hull and the herewith Associated problems of the shape of the aft ship result in the installation of such a tow.

In order to protect the catch, this drag-out was made after numerous suggestions varies with foldable, extendable and liftable parts as well as overlying and sometimes also foldable roller conveyors or conveyor belts.

On the other hand, on side trawlers and smaller stern trawlers, the need for deck space and the design are forbidden of the hull every incision in the hull in the area required to slip on the net Broad. The seaworthiness would also be more similar during the cruise because of the low freeboard Ship types with such a flattening of a part of the ship's hull To suffer.

Side trawlers and smaller stern trawlers have therefore so far dispensed with towing the Stertes. Instead one tried there through a swivel portal the then necessary parts of the catch in the To accelerate Stert, but this did not achieve the time advantages of a Stertaufslips over a Aufschleppe.

It has also been proposed to use a roller conveyor or a conveyor belt on stern or side trawlers to swivel on booms over the stern of the ship, which then briefly as a towing should serve. The outriggers are attached to the stern at the height of the bulwark and should align with a parabolic section of ramp to the deck of a long forecastle.

This proposal does not yet meet the requirements set by practice. The parabolic ramp section in turn limits the deck space and requires structural precautions, for example a cut in the ship itself. The boom is too complicated and expensive as a roller conveyor or conveyor belt and not very robust in rough seas. Above all, however, such a jib, which folds up over the bulwark, prevents any net handling on the bulwark itself over its width. It can deploy and retrieve a device for net
as well as for hauling up the catch on fishing vessels without towing

Applicant:

Dipl.-Ing. Conrad Birkhoff,
Hamburg 13, Laufgraben 37

Named as inventor:

Dipl.-Ing. Conrad Birkhoff, Hamburg

therefore can only be used for a limited number of power supply units. For example, a manual handling of light and large nets, such as pelagic or shallow water nets, exclusively be exposed by the draft and not by the sinking basic roller harness, as well as the aft handling of a purse seine impossible.

In contrast, the invention is based on the requirement for smaller fishing vessels such as side trawlers and smaller ones Rear trawler from where

a) cuts in the hull are impossible because of the space required on deck and the shape of the hull;

b) the need for clearing and exposing the dishes is also required Has deck space;

c) a bulwark swell protection is required for sufficient seaworthiness during the cruise;

d) one for the net work to be carried out over the bulwark is similar to the bulwark Must find construction, and

e) in the case of a boom exposed to sea hammer, the proportion of moving parts to a minimum must be limited.

According to the invention, this is achieved without changing the actual hull or impairment the deck surface is achieved by placing the boom aft or on the side of the ship in a vertical position Direction is pivotally mounted, so that in the raised position it is an enlargement of the deck area forms part of the bulwark for net handling and when folded up vertically.

709 578/90

Claims (5)

This folding boom - for example, two boom arms with intermediate plate aft or on the side of the ship, pivotable in a vertical direction, mounted on the outer skin - carries a floating cross roller that can be lifted from the waterline to the desired position as a landing stage or bulwark. The storage is coordinated with the length of the boom so that bulwark height is achieved in a vertical position. As an extension of this idea, according to the invention, a belt - for example made of plastic or rubber or flexible metal lamellas - is tightened from the deck via the cross roller to any bracket arranged under the boom mounting, which follows the movements of the boom by changing its shape. For the tasks of the jib as towing, the entry into the deck can be improved without impairing the deck space by a rounded deck stringer passage or an additional support body. When using a belt stretched over the boom, depending on the mounting point of the boom on the outer skin, the looseness of the belt with respect to the radial movement of the transverse roller can be compensated for by wrapping around this support body. Since a fixed tow never meets the slip requirements of starfish - filled with, for example, redfish or mackerel - the boom can be flat on the water surface and for a light floating star while maintaining a kinkless curve when the tow enters the deck a heavy, hanging star can be set steeper accordingly. In the case of smaller and particularly sensitive catches, the stert can be pulled up with the boom folded up over the cross roller or over the belt that is then inclined in the bulwark area and swung over using known lifting beams. Advantages of the invention are: 1. no loss of deck space, 2. Possibility of retrofitting without interfering with the hull itself, 3. Can be used in a variety of ways for stern and side trawlers for setting and retrieving fishing gear as well as for purse seine for quick exposure of the purse seine and generally for snowing Pulling up the catch itself; 4. The bulwark is normally fully closed by the folded-up boom and is only opened briefly for work functions; 5. The angular positions as tow can be adapted to the requirements of the fish species. The invention is illustrated, for example, in three drawings: A b b. 1 shows a section and top view of a boom 1 that can rotate about the upper edge outer skin by means of two extension arms with an intermediate plate, which carry a possibly buoyant cross roller 2. In the vertical position the cantilever plate represents the bulwark 3, in the horizontal position the Deck area expanded to a .Assetzbühne 4, while lowered to the water surface drag 5 is formed. A roll-heel position or is preferably used for the high slip of the star Tramp trim used. The rounded transition of the deck string 6 into the shear path can the requirements of the towing 5 are particularly met. Control of the boom arms takes place, for example, by means of hydraulic pressure piston rods 11. A b b. 2 and 3 show a section and top view of an inventive by overvoltage by means of a Belt 7 improved boom 1. The storage is here according to the individual conditions set deep. A support body 8, which at the same time, for example, hydraulic control 11 of the boom arms 1, improves the infeed from the tow into the deck level. In particular A b b. 2 shows the attachment of the device to the side wall of a side trawler, for example Starboard between the front gallows and the forecastle. For the side trawler, the Dwarssee slip conditions recommend round guide coamings 9 inboard, the Narrow the inlet cross-section and hold the star firmly on the belt 7 when pulling it up. The system can follow the rolling movements between positions 5a and 5b and in positionSa it facilitates the towing conditions. In particular A b b. 3 shows the attachment of the device to the transom of a stern trawler or of a ringwadenseiner. In both cases, the neighboring bulwarks are rounded off at the sides. The working position suspension platform 4 creates a desirable extension of the net deck 10. The The catch can be slipped up using the boom, which is unfolded as a tow, as well as using the be hoisted over the folded-up boom as bulwark, depending on the requirements of the type of fish and Swell. Patent claims: 1. Device for launching and retrieving the net as well as for bringing up the catch Fishing vessels without a towing incision, which are in the form of a folding boom as towing serves, characterized in that the boom aft or on the side of the ship is pivotably mounted in the vertical direction, so that it is an enlargement in the raised position the deck area for net handling and in the folded-up vertical position Forms part of the bulwark. 2. Apparatus according to claim 1, characterized in that an already known, more resistant Belt (7) - for example made of plastic, rubber or metal slats - from Deck out over the cross roller (2) to any one under the bearing of the boom (1) arranged bracket is clamped, the movement of the boom (1) by changing its shape follows and thus forms the towing path in a manner known per se. 3. Device according to claims 1 and 2, characterized in that the supporting body (8) is present which round off the deck inlet of the belt (7) forming the towing path and at the same time the radial path shortening of the swivel arc of the cross roller (2) compared to the