JPH0337408Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial field of application> This invention, when breeding benthic fish such as flounder, does not cause any damage to the fish being kept even when subjected to shocks from waves, etc. The invention relates to a submerged fish cage that approximates the natural habitat of fish.

<Conventional technology and its problems> In conventional submerged fish cages used for rearing benthic fish such as flounder, the entire cage net used therein was cut off by sharks to prevent seaweed from adhering to it. In order to prevent this, fish cage nets made of hard plastic wire were used. The fish cage net made of this plastic wire is quite hard, and the submerged fish cage using this net will shake due to the impact of waves, etc., and this will cause the fish to be raised while they are on the bottom. The fish were hit violently against the sides of the fish cage net, causing great damage and even dying.

<Means for Solving the Problems> Therefore, in order to solve the above-mentioned problems, the submerged fish cage according to this invention has a fish cage net stretched inside a metal frame, and this fish cage net is attached to the metal frame. The fish cage net itself protrudes below the bottom end of the fish cage frame to form a bottomed space, and a chain is placed around the bottom edge of the fish cage net to extend the bottom part of the fish cage net into the sand of the seabed. The rearing environment is made to resemble the natural state as much as possible by being buried in the water, and even if the upper metal frame part is vibrated by waves, this vibration is directly transmitted to the bottom during landing. This is to prevent it from being passed on to farmed fish.

<Example> Next, an example of the submersible fish tank according to this invention will be described based on the drawings. 1 is a metal frame formed in a lattice shape, and 2 is a metal frame inside this metal frame 1. This is a fish cage net set up. The fish cage net 2 has a ceiling net located at the upper end of the metal frame 1, and the lower part thereof protrudes below the lower end of the metal frame 1. , a bottom net is formed, and a space is formed in the fish cage net 2 itself. The fish cage net 2 may be entirely knitted from flexible chemical fibers, but may also be a tortoise shell net made of plastic wire, for example, only in the portion of the metal frame 1. The part of the fish cage net 2 that protrudes below the metal frame 1 is formed into an inverted trapezoidal shape, that is, a tapered shape, as shown in the figure. This is to prevent the metal frame 1 and the fish cage net 2 from coming into contact with each other, that is, to prevent that portion of the fish cage net 2 from being lifted toward the metal frame 1 by waves. In other words, although it is necessary to have a certain amount of margin in the cage net 2 that exists below the metal frame 1, this is to eliminate the negative effects of having more margin than necessary. Reference numeral 3 denotes a chain disposed around the lowermost edge of the fish cage net 2, and this chain 3 functions as a weight. In the figure, reference numeral 4 designates a feeding port arranged to communicate with the inside of the cage net 2, and reference numeral 5 designates an anchor connected by a rope 6.

<Function> In this case, the fish cage net 2 accommodates benthic fish for rearing and sinks to the sea floor. Only the bottom of the chain 3 and the chain 3 touch the bottom. Then, due to the weight of the chain 3, the bottom of the chain 3 and the fish cage net 2 are buried in the sand of the seabed. The submersible fish tank is then installed on the seabed using the anchor 5. When installed in this way, the presence of sand on the bottom of the fish cage net 2 not only hides the net and creates a state similar to the natural environment, but also allows the upper metal frame 1 to be damaged by waves. Even if the parts shake, the impact or vibration will not be directly transmitted to the fish because the part of the fish cage net 2 protruding below the metal frame 1 is flexible.

<Effect of the invention> As mentioned above, according to the submerged fish cage according to this invention, a fish cage net is stretched inside a metal frame, and the fish cage net is extended below the lower end of the metal frame. This cage net itself forms a bottomed space, and a chain is placed around the bottom edge of the cage net, so the condition of the bottom of the cage net is very similar to that of the natural environment, and the fish can be raised. The effect is that the fish do not feel uncomfortable, and even if the metal frame is shaken by waves, this is not immediately transmitted to the fish, so the position where the fish live is always in a calm state. In addition, if the entire fish cage net is made flexible, it is particularly suitable for use in the open sea, and since it is arranged within a metal frame, the so-called net structure can be ensured. If the existing frame is made of plastic wire, it has the effect of preventing the adhesion of seaweed and being suitable as a measure against sharks.

[Brief explanation of the drawing]

The drawings show an embodiment of the submerged cage according to the invention, with FIG. 1 being a front view and FIG. 2 being a plan view. 1...metal frame, 2...fish cage net, 3...
Chain, 4... Feeding port, 5... Anchor, 6...
…rope.

Claims (1)

[Claims for Utility Model Registration] 1. A fish cage net is stretched inside a metal frame, and the fish cage net protrudes below the lower end of the metal frame to form a bottomed space by itself. What is claimed is: 1. A submerged fish cage characterized by forming a fish cage, and furthermore, a chain is arranged at the lowermost periphery of the fish cage net. 2. A submerged fish cage according to claim 1 of the utility model registration claim, in which the entire fish cage net is formed of a flexible net. 3. The submersible fish cage according to claim 1, wherein at least the part of the fish cage net that protrudes from the lower part of the metal frame is made of a flexible mesh fabric. 4. The submersible fish cage according to claim 1, in which the fish pen net in the metal frame is made of plastic wire. 5. The submerged fish cage according to claim 1 of the utility model registration claim, in which at least the portion of the fish cage net protruding from the lower part of the metal frame is formed into an inverted trapezoidal shape.