JPH0119673Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement in a trawl net. A trawl net generally consists of a bag net (fish catching part) into which the fish enter, and sleeve nets and hand nets that extend from the opening of the bag net (fish entry part) in a sleeve shape on both the left and right sides. A bag net is usually constructed by layering three layers of bag-like nets made of nylon with different mesh sizes and thicknesses on the inside and outside.

In addition, trawl fishing using such trawl nets can produce relatively stable catches because the targets are benthic fish in general (for example, Alaska pollack, mongolian squid, sea bream, shrimp, flounder, octopus, etc.) that do not move around relatively often. In addition, since fishing gear can be operated based on something that does not move, such as the seabed, it is easier to increase production compared to fishing schools of fish on the surface or mid-layer.

However, in trawl fishing, the bag net part of the seine is in contact with the seabed and is pulled strongly by the trawl boat, so the net itself often rubs against the seabed, causing damage or breakage, which is not only difficult to repair, but also difficult to repair. When the bag net was being pulled up from the trawler to the mother ship using a winch, the impact caused the fish to rub against the ship's side, causing the weakened part to suddenly break, causing the fish in the net to fall all at once through the cracks, causing the fish to fall into the water during the operation. There was also a risk of accidental death by hitting one of the fishing crew members.

Therefore, in order to prevent the net from being rubbed when bottoming out, one end side of a tufted body made by unraveling a thick rope and cutting it into a predetermined length is tied to the bottom side of the bag net, which is prone to rubbing, so as to overlap it one after another. However, the work of attaching the tufts to the net must be done one by one by hand, which is extremely troublesome and requires a lot of time and effort. Not only were they unnecessarily heavy and difficult to repair, but the tufted bodies had the disadvantage of not having any net function, making them impractical.

The present invention was made based on the above-mentioned circumstances, and its purpose is to provide a trawl net consisting of sleeve nets, bag nets, etc., with a required meat pressure w on at least the bottom side of the bag net. A protective cover with a mesh that can be expanded and contracted by connecting band-shaped elastic members having a width of 1 and width 1 facing each other is attached in a superimposed manner to cover the outside of the bag net, thereby eliminating the rubbing of the bag net when bottoming out. It is possible to reliably prevent wear and tear of the net, greatly increase the strength and durability of the net itself, and provide excellent safety.Moreover, there is no need for the net to have a triple structure as in the past. It is an object of the present invention to provide a trawl net that can have a simple net structure, is lightweight, and can reduce costs.

To explain the structure of the present invention with reference to an embodiment shown in the drawings, FIG. 1 shows an example of a trawl net 1, in which numeral 2 is a bag net for fish, 3,
Reference numeral 3' designates sleeve nets extending from the opening 2a of the bag net 2 to the left and right sides, respectively.

The bag net 2 in the illustrated example has a dual structure of inside and outside, and the inner net 2' has a smaller diameter and mesh size than the outer net 2''.

4 is a protective cover, and this protective cover 4 has a required wall thickness w (for example, 6 mm) and width l (for example, 1 mm).
cm) of elastic member 4', for example a strip of nylon,
A reinforcing core material embedded inside a synthetic resin, rubber, or a nylon band of these materials is also constructed by connecting them into a mesh of an appropriate size. The mesh-like protective cover 4 is secured to the bag net 2 at the outer periphery of the protective cover 4 with a string 5 so as to cover at least the bottom side of the outer side of the outer net 2'', that is, the surface that comes into contact with the seabed during bottoming. It has a triple structure in which the inner net 2', the outer net 2'' and the protective cover 4 are stacked one on top of the other in an overlapping manner. The protective cover 4 may be fixed to the bag net 2 by any suitable method, such as by fastening with a string 5 or by fastening with a fastener (not shown).

Reference numeral 6 denotes a connecting fitting for connecting the elastic members 4' in a mesh pattern, and this connecting fitting 6 is as shown in FIG.
Left and right spaces a, a into which the elastic members 4' are inserted are provided, and the elastic members 4, a are inserted into the spaces a, a.
After inserting and positioning 4', the inclined pieces 6a,
By bending 6a inward, the elastic members 4',
4' can be connected with a single touch, and the elastic members 4', 4' are evenly pressed from both sides by the central plate 6b and the inclined piece 6a, while the elastic members 4', 4'
Since the upper and lower edges of the elastic members 4' are pressed by the top plate 6c and the bottom plate 6d, they can be fixed very firmly and reliably, and the elastic members 4', 4' will not shift or come off after being connected. Furthermore, the center plate 6b has an inner thickness (6 mm) that is approximately the same as the wall thickness of the elastic member 4', and this thicker center plate 6b serves as a spacer, making it easier for the mesh b to spread in the lateral direction. .

Now, for the operation, after checking the currents, water temperature, etc. and finishing the preparation of the drag net, first the bag net 2 of the trawl net 1 is put into the sea, then the sleeve nets 3, 3',
The hand net is stretched out, and then the trawl seine is tied to an otter board (not shown) and lowered. After loading the fishing gear, the seine at the bow and stern is tied to the fair leader (not shown) at the stern, the net is fixed, and the vessel is moved forward. Seine fishing is started in this way, and each net takes 4 to 5 hours. During this time, the bottom side of the bag net 2 is pulled while contacting the seabed, so the bag net 2 rubs against rocks, protrusions, etc. on the seabed. It is easily damaged.

However, in the present invention, on the bottom side of the bag net 2, belt-shaped elastic members 4', 4' having the required wall thickness w and width l are connected to face each other in a mesh pattern to form a mesh b that can be expanded and contracted. Since the cover 4 is attached in a superimposed manner so as to cover the bag net 2 from the outside, the bag net 2 will not come into contact with the seabed during seine fishing, and therefore the bag net 2 will not be rubbed and damaged or damaged. is prevented. Moreover, since the seabed contact part of the protective cover 4 is the outer edge in the width direction, the protective cover 4 acts as a spacer to keep the bag net 2 away from the seabed by the width l.
The damage prevention effect of the bag net 2 is further enhanced. In addition, in order to prevent wear and tear on the bag net 2, when hoisting up the bag net 2 containing fish catch with a winch,
It also prevents the risk of the bag net 2 hitting the ship's belly, etc., causing the weakened net portion to suddenly break due to the impact, and causing the fish in the net to fall all at once through the cracks, resulting in unexpected personal injury. In addition, even if the bag net 2 is damaged, the protective cover 4 itself that covers the outside will act as a net, so the fish caught and housed in the bag net 2 will not leak out from the damaged area. can be prevented.

In addition, the protective cover 4 is made of a strong and lightweight elastic material 4' such as nylon, so it has excellent durability.
If a part is damaged, only that part needs to be repaired, and the work of attaching the protective cover 4 to the bag net can be done easily.

As described above, the present invention provides a protective cover for a trawl net consisting of sleeve nets, bag nets, etc., in which elastic members having a required thickness and width are connected in a mesh shape at least on the bottom side of the bag net. Because it was attached in a polymeric manner to cover the outside of the bag net,
As a result of the protective cover acting as a spacer to keep the bag net away from the seabed by its width,
It is possible to eliminate the rubbing of the bag net during bottom trawling, and to reliably prevent wear and tear of the net caused by rubbing, greatly increasing the strength and durability of the net itself, and also There is no need to form the net into a triple-layered structure as in conventional ones, and the net structure can be simple, making it lightweight and reducing costs.In addition, if the protective cover itself is damaged, only the damaged part can be removed. All you have to do is repair it, and not only can the protective cover 4 serve as a net, but the protective cover has a mesh shape that can be expanded and contracted, so it can respond to the expansion of the net by the fish caught, so there is less burden on the protective cover. The protective cover has excellent durability and can be used for a long time.
In addition, when not in use, the bag net shrinks naturally due to the shrinkage force of the protective cover, so it has extremely useful practical effects, such as making it easier and faster to bundle and gather the bag nets.

[Brief explanation of drawings]

Fig. 1 is an overall perspective view of the trawl net according to the present invention, Fig. 2 is a sectional view of the bag net, Fig. 3 is a bottom view of the main part, and Fig. 4 is a partially cutaway enlarged perspective view showing the structure of the protective cover. FIG. 5 is a perspective view showing the structure of the connecting fitting. In the figure, 1 is a trawl net, 2 is a bag net, 3,
3' is a sleeve net, 4 is a protective cover, and 6 is a connecting metal fitting.

Claims (1)

[Scope of utility model registration request] In a trawl net consisting of a sleeve net, a bag net, etc., at least on the bottom side of the bag net, band-shaped elastic members having a required wall thickness w and width l are connected facing each other in a mesh shape to form a network that can be expanded and contracted. A trawl net characterized in that a protective cover provided with is attached in a polymeric manner so as to cover the outside of the bag net.