DE822636C - Slip hook for hoisting lines of bottom trawls - Google Patents

Description

(WiGBL p. 175)

ISSUED NOVEMBER 26, 1951

K 2664 III145h

After the bottom trawl has been deployed, each fishing vessel must remove the two trawl lines, the haul the net, lay it on the stern, with it it can maneuver freely. The slip hook is released again before the net is pulled in.

Fig. Ι illustrates the course of the Kurrleinen on a fish steamer from the net winch ι over the gallows rollers 2 and 3. The hoist lines 4 are hoisted together with a Haktau 5 at the stern in such a way that you get a heavy Hook, which is attached to a wire rope, from the front gallows along the hoist line lets slide. When this hook rope is hoisted, the second lifting line is also caught, and both Slip hooks are used outside of the railing. The attachment of this slip hook takes place at 6 or 7.

Fig. 2 illustrates the currently common slip hook.

The use of this slip hook has the following disadvantages:

1. To place this hook, the operator must always step between the hook and the railing, because the lifting lines are only together in front of the hook, while they pass behind the hook the boards are kept apart

(see Fig. 3). In addition, the man has to bend far outboard. The man is constantly in mortal danger. The accidents occur when the hook hook or hook hook is broken and when the kurrelinen is raised in the aft sea. Because of these frequent accidents, the warning is painted on the stern of every German fishing steamer, according to the regulations of the Seeberufsgenossenschaft: Do not step between the hook and the railing .

2. In this slip hook is also the sore point for the lifting lines. The net hooks at the bottom,

so usually one of the two curling lines breaks in the slip hook. If the line does not break, however, it will fetch automatically from the net winch, and it is created by the friction of the hoisting line on the edge of the Sliphakens cause considerable damage to the rope.

These deficiencies outlined above gave rise to the creation of a new slip hook, these disadvantages are eliminated.

The new ίο Sliphaken according to Fig. 4 and 5, au * s two tong parts, upper and lower parts 1 and 2 are in the lower part two rollers 2 ^a mounted, which are movable about an axis 2 *. The rollers serve as storage for the leashes. The top 1

is used to close and open the hook. The locking lugs of the upper and lower part hold the Hook together as a whole.

Both parts are held by a carrier 3. The sponsor is made up of sponsors

ao and carrier fork. In the carrier fork upper and lower part of the bolt means Sliphakens i "and ^C 2 are movably mounted.

To the support shaft is a compression spring 4 with an upper movable abutment 5 and a

he lower fixed abutment 6. The movable upper one The abutment is fastened and'gleitet to the upper end of the support shaft with a screw nut for guidance by means of two through-holes on two guide pins 7.

These guide pins are inserted through two holes in the railing and two holes in the Lower abutment guided at the same distance from the support shaft and below the lower fixed abutment fastened with two screw nuts.

Between the upper and lower part is used to secure

a fitting piece 8 with cotter pin 8 "pushed.

Attaching the new slip hook: The slip hook

is mounted inboard on the stern behind the hook roller. The actual slip hook protrudes through a cutout in the entrenchment outboard. The section is kept so large that the hook can move about its carrier axis at an angle of .60 °. This is necessary in order not to close the locking lugs of the hook when the ship is turning to port or starboard very demanding. If the lifting lines are not in the hook, the lower part hangs vertically between them the carrier fork inboard. The upper part can be removed to avoid damage when the ship is not at the fishing site.

How it works: After the net has been deployed, the hoisting lines are in the usual manner on Aft is hoisted in by means of the hook rope. The lower part of the hook is then from the inboard lifted up until both lifting lines rest separately on the pulleys. The hook is on it with the top closed. The locking lugs of the upper and lower part hold the hook as Whole together. In order to automatically open the hook when the sea is moving To avoid drag lines, the fitting piece 8 is pushed between the upper and lower part. For handling the inside is provided with a breakthrough. So that the fitting piece when turning the If the ship is not pushed out by a lashing line, the fitting piece is secured with an 8 "cotter pin.

To release the lashing lines, the cotter pin and adapter are first removed, then through a hammer blow on the free-standing lever arm of the upper part of the hook opened. The lower part flaps downwards, and the hoisting lines come unhindered over the sloping edges at their contact points free.

Advantages of the new slip hook compared to the previously used one: 1. By attaching the Sliphakens behind the hook roller, inboard, the serving man stands outside the hook rope and is no longer endangered; 2. When the leashes are picked up automatically, they will no longer be damaged because they slide on rollers here.

Every fisherman has often wished to know how far it is before hauling in the net The net is filled so as not to waste time and effort by lifting it prematurely or something like that to haul for a long time until the entire gear is lost due to overcrowding of the net. The latter happens frequently, especially in the herring season, and brings sensitive items to the shipowner economic losses. So far one tried to avoid this by observing the curling lines, which stand closer with higher loads. This observation is not possible from the bridge, and the filling of the network is therefore often determined too late. A moderate filling can be hardly notice it.

Since an increased load on the leash is first transferred to the slip hook, it is more resilient Holder of the Sliphakens an accurate measurement of the network load possible on the bridge at a electrical measuring instrument can be read. In addition, in parallel with the measuring instrument still switched an alarm bell, so that if the fishing gear is overloaded by hooking on the On the bottom or in dense schools of herring a loss of the fishing gear when the machine is stopped can avoid.

The measuring resistor is fastened in a watertight housing α in front of or behind the slip hook on the inboard of the entrenchment as shown in Fig. 6. The change in stroke with different loads on the fishing gear is transmitted by a lever b with pressure pin c from the upper movable abutment of the compression spring to a variable electrical resistance d . The lever is held so long that the entire resistance is connected in the zero position and the lowest resistance in the case of the greatest load. Electricity is taken from the ship's network. One pole is placed directly on a voltmeter, while the other pole leads to the variable contact e of the resistor. One end of the resistor is connected to the other contact of the voltmeter. The voltmeter is on the

Bridge attached so that it is clearly visible for the oarsman. A Alarm bell switched.

Claims (6)

Claims ·. 1.Slip hooks for the trawl lines of the bottom trawls, characterized by a pincer-like body (i. 2) attached to the ship's side, the mouth of which receives the hoisting lines. 2. slip hook according to claim i, characterized by two arranged in the lower pliers part Rolls for the leashes. 3. slip hook according to claim 1 or 2, characterized by a between the tong arms sliding and securable adapter (8). 4. slip hook according to claim 1 or the following, characterized by a support fork for receiving the tong arms, the shaft of which against spring action between guide pins (7), the ao are attached to the side wall, is displaceable. 5. slip hook according to claim 1 or the following, characterized by a fixed abutment (6) for a spring which surrounds the shaft and which is displaceable in the abutment, and a spring on the »5 Guide pin sliding abutment for the spring, to which the shaft is screwed. 6. slip hook according to claim 4 or the following, characterized by one of the movable Shaft adjustable electrical resistance for the purpose of displaying the load on the leash and the degree of mesh filling. 1 sheet of drawings © 2417 11.51