JPS59118029A - Extensible fishing net - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a bottom net of a fishing net used for aquaculture cage fishing nets and the like.

[Prior art]

Conventionally, a single net was used for fish tank fishing nets, and the upper end of the net had multiple stages of floats floating on the sea surface, and the lower end was set up in the sea using weights. A fish net was formed by the seed net formed by the fish and the bottom net formed by the separation.

However, as mentioned above, the bottom net of this type of fish tank fishing net is a single piece of net, so waves, wave height, currents, water currents caused by raging typhoons, and wave force can cause the bottom net to become stretched and damaged. It was the cause.

[Purpose of the invention]

The present invention has been made in view of these conventional drawbacks, and an object of the present invention is to provide a bottom net for a fish cage fishing net that can withstand waves, wave height, currents, water currents caused by raging typhoons, and wave force, and protect fishing grounds.

[Summary of the invention]

Therefore, the inverse telescopic fishing net of the present invention achieves the above object due to the following features.

■ Avoid water pressure such as wave height, water current, wave force, etc. applied to the bottom net by creating slack in the bottom net and allowing the bottom net to hang down in a conical shape due to the gravity of the bottom net itself or the gravity of a weight installed on the bottom net. .

■ When the waves are calm, the bottom net hangs down in a conical shape due to the bottom net (gravity) or a weight (gravity) installed on the bottom net, but as the waves rise and fall, it automatically hangs down as the waves move up and down. It forms a bellows, expands and contracts, and automatically returns to its original reverse bellows state as the wave's heave motion subsides. This expansion and contraction action buffers the water pressure generated by the vertical movement of waves and protects the bottom net from breaking. The principle of the reverse bellows system will be explained with reference to FIG.

The bellows is made up of buoyancy and gravity. When the buoyancy of a bellows is increased, the gravitational force is absorbed by the buoyancy, and when the gravitational force is increased, the buoyancy is absorbed by the gravitational force. In other words, the bellows expands and contracts due to the causal law between buoyancy and gravity, but in the inverted bellows method used in the present invention, when the waves are calm, the weight (gravity) ), the bottom net maintains a stretched state, and when the height of the waves decreases due to the wave height movement, the weight (gravity) droops and the float (-buoyancy) temporarily remains stationary. The bottom net contracts by forming a bellows with the float (buoyant force) at the top.

Figure 1 is an explanatory diagram of Hara's explanation of the reverse bellows method.
A l r A 2 p Am is a weight (gravity) and represents the gravity including the bottom net and the like. Bl and B are floats (buoyant force), and in FIG. 1(b), they represent buoyancy including the buoyant force newly generated on the float, bottom net, etc. due to water flow, water pressure, etc.

Figure 1 (,) shows a state where the waves, etc. are calm.

In such a state, float B1. The buoyant force fl exerted by Bl on weight A1, fz and the gravity g1 of weight A1 are (ft+
fz)≦g1, and the bottom net is in an extended state. Furthermore, as the condition approaches the equality state, the bottom net will contract due to a slight water flow or water pressure.

Figure 2 (b) shows that the buoyant force of float 'B1#B2 increased to f 1' * f z' due to water current and wave force caused by waves, resulting in the relationship (f, / + tz') > gt. This shows a state in which the bottom net has contracted to form a bellows with the floats B1 and B at the apex.

In the above explanation, weight A! .
l forms a row of floats surrounding the weight A, and the weights A and lA3 form a floating row surrounding the floats B1 and B.
In figure (b), the separation (gravity) consisting of weights A2 + A3,
A float row (buoyancy) consisting of floats B1+B1 and a weight Al (
A set of ring-shaped bellows is formed by the force of gravity).

[Structure of the invention]

Embodiments of the present invention will be described below with reference to FIGS. 2 to 6. Between-plane symbols indicate the same configuration.

FIG. 2 is a perspective view illustrating the first embodiment of the fish cage fishing net according to the present invention, and FIG. 3 is an explanatory diagram showing the method of installing the first embodiment in the sea and its operation. In these figures, l is a fish cage fishing net consisting of a wall structure 2 and a bottom net 3.

The material of the fish cage fishing net 1 is made of pure cotton, chemically synthesized net, blended net, metal net, etc. An extension main rope 4 is integrally provided at the upper end of the net 1 of the wall assembly 2 on the sea surface side, and a large float 5 fixed to the extension main rope 4 is floating on the sea surface. Furthermore, the main elongated main rogue 4 near the large float 5 is pulled in four directions by an outer tensioned anchor rogue (18 to be described later), so the fish cage fishing net 1 is fixed on the sea while maintaining its rectangular shape.

A weight 6 is provided at the lower end of the net 1 of the wall assembly 2 on the underwater side. The weight 6 and the large float 5 are connected by a vertically reinforcing rower, and a weight 8 and a float 9 are fixed in the middle of the vertically reinforcing rower, so that the weight 8 can move away (gravity). A bellows 10 is formed by a row of floats (buoyant force) made up of the floats 9 and a floating force (gravity) made up of the weights 6. The weights 6, 8, and floats 9 are connected by horizontal reinforcing ropes 11, 12, and 13, respectively.

The bottom net 3 hangs down in a square pyramid shape by a weight 6, a weight 14, and a main bottom reinforcing rogue 15 connecting the weight 6 and the weight 14. Further, a float 16 is fixed in the middle of the main bottom reinforcement row 15, and the floats 16 are connected by a bottom reinforcement row 17, and the floats 16 form a rectangular row of floats.

From the above configuration, the fish cage fishing net 1 is as shown in FIG.
The vicinity of the large float 5 is pulled in all directions by an outer tension anchor Rogue 18. That is, the other end of the outer extending anchor loaf 18 is fixed to an anchor 19 fixed to the seabed, and since a float 20 is provided midway through the outer extending anchor loaf 018, the floating force of the float 2° The external extension anchor row f1B is for pulling the fish cage fishing net 1 in all directions.

Figure 3(a) shows relatively calm waves,
The fish cage fishing net 1 maintains the shape shown in FIG.

FIG. 3(b) shows a state in which a high wave has rushed in. The wall structure 2 buffers the water pressure by extending its bellows 1o, and the bottom net 3 has a pyramidal shape that hangs down. This removes water pressure and prevents mesh breakage.

Figure 3(c) shows a state in which the high waves have receded and the large float 5 on the sea surface has suddenly lowered, and the wall structure 2 and bottom net 3 contract to form a bellows to buffer the water pressure. is now ready for the next wave height. That is, wall assembly 2 is again bellows 1o.
is formed, and the bottom net 3 is separated by the hammer 6 (gravity),
By forming a set of bellows 21 consisting of a float row (buoyancy) consisting of floats 16 and a weight 14 (gravity), wave height,
It can withstand water pressure.

The fixing method and function of the raw A pond net 1 explained in Fig. 3 are as follows:
Although there are differences in degree in the following embodiments, this is a common explanation and will be omitted in the following embodiments.

FIG. 4 is a perspective view illustrating a second embodiment of the fish cage fishing net 1 according to the present invention, and is a simplified version of the first embodiment in FIG. In this embodiment, when the float 5 on the sea surface, which has been raised by the vertical movement of waves, descends, the bottom net 3 contracts, causing the weight 6 to move away (i), and the bottom net 3 itself (buoyancy/
) and a weight 14 (gravity) and a pair of bellows are formed to buffer water pressure and prepare for the next wave height.

In some cases, the center weight 14 may be removed and the bottom net 3 itself may be used as a gravitational force instead of the weight 14.

FIG. 5 is a perspective view illustrating a third embodiment of the production fishing net 1 according to the present invention, and the bottom net 3 is more complicated than the first embodiment shown in FIG.

Main bottom reinforcement Rogue 15 with bottom N43 hanging in a square pyramid shape
Floaters 22, 24, 26 and weights 23, 25 are alternately fixed in the middle. Based on such a configuration, when the wave height decreases due to the wave height movement, the bottom net 3 is divided into a row of floats made up of the floats 22 (buoyant force), a row of floats made up of the floats 24 (buoyant force), and a row of floats made up of the floats 26. It contracts by forming a three-layer bellows with (buoyancy) at its peak, and its expansion and contraction buffers wave height, water flow, and water pressure. In this embodiment, an example is shown in which a reverse bellows system is used for the wall assembly 2. In other words, weights 27°29.31 and floats 28, 30, and 32 are fixed alternately in the middle of the vertically reinforced Rogue, and when waves move up and down, the floats move like the bottom net described above. 2
8 float rows (buoyant force), float 30 rows (buoyancy)
A three-layered bellows is formed with the float row (buoyant force) consisting of floats 32 as the apex, and the expansion and contraction movement of the bellows causes the wave height,
Water flow and water pressure are buffered.

FIG. 6 is a perspective view illustrating a fourth embodiment of the fish cage fishing net 1 according to the present invention, and FIG. 2 shows a modification of the first embodiment. That is, a weight 33 is further fixed in the middle of the main reinforcing row f15 of the bottom net 3, and the weight 33 is connected to the weight 6 and the float 1.
It is located between 6 and 6. Between the weights 33 and 33, bottom reinforcement low f
34.

In this embodiment, by adopting such a configuration,
The starting point of the formation of the bellows with the float (buoyancy) consisting of the float 16 as the apex is lowered from the separation (gravity) of the cone 6 in the first embodiment of FIG. 2 to the separation (gravity) of the weight 33. By restricting the formation of bellows, the bottom net 3 is prevented from protruding into the fish tank fishing net 1, and the fish etc. cultured in the fish cage fishing net 1 can be bottom net 3
This is to prevent death or injury during the formation of the bellows.

[Modified example of the invention]

As mentioned above, four embodiments of the present invention have been illustrated, but the present invention is not limited to these, and various configurations can be taken such as further combining the above-mentioned embodiments, increasing the number of inverted bellows, and applying pressure in a pyramid shape other than a square pyramid. .

Incidentally, the bellows layer 10 used in the wall assembly 2 may be formed by the method shown in FIG.

FIG. 7 is a partial front view illustrating a part of the wall assembly 2 of the fish tank fishing net 1, and as shown in FIG. Further horizontal reinforcement loaf °
111, 112 are provided, horizontally reinforced loaf'll, 112
Lobes 35 are placed at the intersections 71 and 72 of the vertically reinforced Rogua
．． 36, and one end of the lobe 35 connects to the side-limiting main lobe 4.
@37 is installed on the intersection 71 side, and a float 38 is fixed to one end of the row f36.

The wall assembly 2 having such a configuration is used underwater as shown in Fig. 7 (
As shown in b), the weight 37 (gravity), the float 38 (buoyancy),
A bellows 10 is formed with a weight 6 (gravity). Incidentally, since the bellows having the above structure can be formed by simply changing the strength of the float 38, a plurality of bellows rows can be easily formed even at sea.

〔Effect of the invention〕

The present invention is based on the configuration of the embodiments as described above.
The bottom net can expand and contract to deal with currents or typhoon temperatures, thereby buffering the water pressure from the water flow, and the cone-shaped hanging shape allows the water pressure to be released, preventing the bottom net from breaking. A1: Even when a fishing net is set up in the rough seas of the outside world, the bottom net does not break and has the effect of protecting the fishing grounds.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram illustrating the bellows inversion method. Figures 2 to 6 illustrate embodiments of the fish cage fishing net according to the present invention; Figure 2 is a perspective view of the first embodiment; Figure 3 is a perspective view of the first embodiment; FIG. 2 is an explanatory diagram illustrating a method and effect of fixing a fish cage fishing net according to an example. 4 is a perspective view explaining the second embodiment, FIG. 5 is a perspective view explaining the third embodiment, and FIG. 6 is a perspective view explaining the fourth embodiment. . FIG. 7 is an explanatory diagram showing a configuration that can easily form a bellows even at sea. 1... Fishing net, 3... Bottom net, 14, 23, 25° 33... Weight, 16, 22, 24. 26... Float. Figure 1 Figure 2 Figure 4 Figure 1 Figures 5 and 6 Figure 7 (b)

Claims (3)

[Claims] (1) The bottom net of the fish pen is made slack, and the bottom net is suspended in a conical shape by the bottom net (gravity) or a weight (gravity) provided on the bottom net, making it possible to expand and contract the bottom net. A retractable fishing net with a reverse bellows system. (2) Allow slack in the bottom net of the fish cage, hang the bottom net in a conical shape using the bottom net (gravity) or a weight (gravity) provided on the bottom net, and place a weight (gravity) at the lower end in the middle of the bottom net. A float weaker than (
An inverted bellows type telescopic fishing net that allows the bottom net to expand and contract by providing arbitrary buoyancy (buoyancy). (3) Claim 2, which makes it possible to expand and contract the bottom net by alternately providing floats (buoyancy) and weights (gravity) that are weaker than the weight (gravity) at the lower end in the middle of the bottom net. A retractable fishing net with a reverse bellows system as described in .