JPH01304835A - Structure of small divided net for culture and method for washing the same net - Google Patents

Abstract

PURPOSE:To prevent seaweeds and other microorganisms from sticking to a net and contrive development of culture industry by rotating small divided nets for culture consisting of a polyhedral hollow unit fixed in the ocean at an interval of a prescribed period, exposing the surface sunk in water to the sea surface and drying the net in the sun. CONSTITUTION:Each small divided net 1 for culture is constituted of a closed polyhedral hollow unit having the bottom (1a), peripheral sides (1b) and (1c) and ceiling part (1f). The bottom, peripheral sides and ceiling parts are respectively detachably connected. The small divided nets 1 for culture are then rotated at an interval of a prescribed period to expose the surface sunk in water to the sea surface and dry the surface in the sun. As a result, seaweeds and other microorganisms are prevented from sticking to the nets and the culture industry can be developed without stagnation.

Description

[Detailed description of the invention] Industrial application 1- The present invention relates to the structure of a small net for aquaculture and a method for cleaning the same,
In particular, it is possible to use small divided nets consisting of closed polyhedrons or removably connected polyhedrons, and to dry parts of them in the sun, without using highly toxic chemicals. This allows for easy cleaning of adhering algae and microorganisms.

Lazy technology In fish farming using the ocean, small nets are used to house the cultured fish, but if the nets are submerged in the sea for a long period of time, seaweed and other organic organisms will adhere to the nets. and crush the mesh,
Poor circulation of seawater results in a lack of oxygen, which impairs the feeding of farmed fish, resulting in reduced growth and disease.

Therefore, in the conventional way, the small parts themselves had to be replaced every 2 to 3 weeks. This work involves connecting the small net to be replaced with a new small net, driving the cultured fish into the new small net, pulling the old small net onto land, and washing it for 2 to 3 hours. Dry in the sun, check whether the net is 0 or not, and use it again. However, this method requires new nets, transportation to the replacement location, and replacement of farmed fish, which requires a great deal of effort and expense.

Therefore, without having to do short-term replacement of the small net,
A method of coating nets with special chemicals to prevent the adhesion of seaweed and microorganisms has been considered, and until recently most people had relied on this method. This chemical is a dye containing an organic tin compound (T B To), and since the net is dyed with this dye, the dyeing process requires hard labor and is expensive. Moreover,
Since the dye contains a tin compound, it may have an adverse effect on the human body, especially when used as a small net, the dye dissolves and flows into the sea, which ionizes and enters the bodies of farmed fish. There is a danger that it may even cause social problems such as intrusion and harm to human health.

Currently, the use of this dye itself is being discouraged.

However, since the use of the above-mentioned dyes has been voluntarily refrained from, no alternative measures have been provided or developed, and the aquaculture industry using small nets will decline. We are in a situation of frequent crisis.

However, if you have to replace the small netting every 2 to 3 weeks, it will be inefficient and costs will increase.

It is impossible to provide cheap farmed fish to the Japanese diet, which prefers fish.

Therefore, in view of these circumstances, the present invention prevents seaweed and other microorganisms from adhering to w4 by developing a structure for small nets and a method for cleaning them, thereby preventing the aquaculture industry from stagnation. This was done with the aim of enabling development without any problems.

. In order to solve the above-mentioned problem, the present invention is a multi-sided hollow body having a bottom, a circumferential side, and a top, or a multi-sided hollow body with each side removably connected. The fish is kept stationary in the ocean, with cultured fish housed inside, and rotated at predetermined intervals to expose the submerged surface above the sea surface, or the exposed part is removed and dried in the sun on land.

Saku 4 - According to the above-mentioned structure of the present invention, since the top part of the small dividing net is provided, which does not exist in the past, the amount of net used increases, but the cost is small because there is no need to create a new small dividing net. In addition, each surface can be washed at sea during use, or while drying the removed part in the sun on land, so even if seaweed or other microorganisms adhere to it, it can be removed by killing it, and the mesh can be removed. Prevent crushing.

1 seed■ The present invention will be explained below based on illustrated embodiments.

Figures 1 and 2 are a front view and a plan view showing the entire small net, in which two small nets 1.1 are connected by ropes 4, 4 on a regular road, and buoys 3, 3, respectively. It is connected to anchors 5, 5 via ropes 2, 2 and fixed in the ocean 6. The small mesh l is a hexahedron such as a regular cube, and the bottom part 1a
, the circumferential side portions 1b to 1e and the top portion 1f are each made of a net, and an opening 1g that can be opened and closed is formed on each surface. This opening 1g is formed by, for example, cutting a part of the net into a T-shape, and tying the cut portion with mesh thread,
The knot is untied and opened when taking out or taking out farmed fish or feeding the fish. Small portion! A small part 7 made of a steel pipe frame is removably attached to the top part 1f of 11, and an appropriate number of buoys 8 for floating this small part 7 in the ocean 6 are attached to the lower part of the small part 7. The subdivision 7 may be a trussed steel frame as shown in Figures 3 and 4, or it may be a steel pipe pile of 10°1 as shown in Figures 5 and 6.
It may be made of rope in which 0 is tied with a rope, or it may be made of bamboo as shown in FIGS. 7 and 8. Moreover, the small ill may be octahedral or cylindrical.

The small net 1 is submerged substantially vertically into the ocean 6, and an appropriate number of weights 9 are attached to the bottom 1a in a removable manner.

Therefore, the top part 1f of the small net 1 is exposed above the sea surface, and is in an environment where it is constantly dried in the sun and washed by rainwater and ventilation.

Next, another embodiment of the present invention will be described. Figures 9 and 10
As shown in the figure, all sides of the small net 1 are removably connected by connecting devices such as hooks 11. The hooks 11 are fixed at appropriate intervals to ropes or the like on the peripheral edge of the mesh constituting each surface, and are engaged as pairs with hooks 11 located at corresponding positions on mutually adjacent surfaces. The hook 11 is preferably a so-called snap ring so that it can be easily engaged and detached.

Further, as shown in FIGS. 11 and 12, each surface is connected with a rope 12, and each surface can be removed individually by untying the rope 12.

In this way, by making each side of the small net 1 removable independently, the side turned above the sea surface can be removed.

This allows the net to be dried not only at sea, but also on land and dried in the sun, making it easy to remove each side of the net that has been damaged, and eliminating the need to repair the entire small net on land. Note that the connection between each surface is not limited to snap rings or ropes, but may also be fastening means such as fasteners, and if necessary, if each surface can be easily removed from the other surfaces,
Any type of connector may be used.

Next, to explain the method of cleaning each side of the small net 1 in the ocean with reference to Fig. 13, after 3 to 4 days have passed since the small net 1 has been placed, the small net 1 is placed in the sea. For example, the top part 1f, which had been exposed above the sea surface, is submerged in the sea, and instead, for example, the circumferential side part 1b is exposed above the sea surface. Then, after another 3 to 4 days, the circumferential side part 1b is
ff, and instead the bottom portion 1a is exposed on the σ plane. At this time, the top part 1f and the bottom part 1a are in completely opposite positions.

After another 3 to 4 days, the bottom part 1a is submerged in the sea, and the peripheral part 1d is exposed above the sea surface instead. After that, 3 to 4 days later, the circumferential side portion 1d is submerged in the sea, and the circumferential side portions 1b and l are replaced instead.
Either one of e is exposed above the sea surface. After a further 3 to 4 days, the remaining side is exposed above the sea surface, and each side of the small net 1 is dried in the sun for a certain period of time by simply turning it in a desired rotation while containing the cultured fish without replacing it.

It can kill seaweed and microscopic organisms that have adhered to it. That is, it takes 3 to 4 days to turn one page, and it takes 2 to 3 weeks to turn the whole page in one order. It is obvious that the rotation of exposing each surface above the sea surface is not limited to the above-mentioned order and can be created or modified in various ways.Also, it is obvious that the rotation of exposing each surface above the sea surface can be created or changed in various ways.Also, it is obvious that the rotation of exposing each surface above the sea surface can be created or changed in various ways. It can also be exposed to

According to the present invention described above, the following effects are remarkable.

First, by configuring the small net as a closed polyhedron, at least one side can be exposed on the 1σ plane, so the - side can be dried in the sun to remove attached seaweed and microscopic particles. Cleaned by killing living things,
By repeating this process in an appropriate rotation, it is possible to easily and economically construct a small screen having at least one side with an unbroken mesh.

Second, by configuring the small split net as individual face pieces with each side removably connected, the removed parts can be dried in the sun even on land, and when replacing W4 with a new one, only the damaged side can be replaced. It is economical, and if the dimensions are unified when there are a large number of nets, one side of the net with a lot of seaweed and microorganisms attached can be replaced with another side of the net depending on the adhesion situation, and seaweed and microorganisms can be easily attached. An overall management method can be developed depending on the adhesion status of microorganisms.

Thirdly, since the work of turning the small net at a fixed location is sufficient, the work is simple and labor can be reduced.

Fourthly, since the small mesh metal body is not replaced, the cost is 1~ low, and there is no need to replace the farmed fish, so there is no harm to the fish.

Fifth, since no organic tin compound is used, it is safe, and the cost and labor required can be omitted.

Sixth, since the small net is rotated, damage or damage on each side can be easily discovered and repaired.

Seventh, since the net is a closed net, there is no open part above the sea surface, so the farmed fish are not stolen by birds.

[Brief explanation of the drawing]

FIG. 1 is a front view showing one embodiment of the structure of a small aquaculture net according to the present invention, FIG. 2 is a plan view thereof, and FIGS. Figures 3, 5 and 7 are front views, Figures 4, 6 and 8 are plan views respectively, Figures 9 and 11 and Figures 1O and 12 are respectively other views. FIG. 1 is a perspective view and a partial front view showing an example. FIG. 13 is an explanatory diagram of the operation. ■...Small mesh 1a...Bottom 1b=1e
...Surrounding part 1f...Top part 1g...Opening part
2, 4... Rope 3.8... Buoy
5...Anchor 6...Ocean 7...
Small portion 9... Weight 10... Steel pipe pile 11
...Hook 12...Rope patent issued
1) Hiroshi - Figure 3, Figure 7, Figure 7, Figure 10, Figure 12

Claims (5)

[Claims] (1) A small aquaculture net characterized by being composed of a closed multi-sided hollow body having a bottom, a circumferential side and a top. (2) A small aquaculture net comprising a multifaceted hollow body having a bottom, a circumferential side, and a top, the bottom, circumferential sides, and top being removably connected to each other. (3) The small aquaculture net according to claim 2, wherein each side is connected to the peripheral portion via a hook, a fastener, or a rope. (4) A small aquaculture net consisting of a multifaceted hollow body placed in the ocean, rotated at predetermined intervals to expose the submerged surface above the sea surface, and drying in the sun. cleaning method. (5) A small aquaculture net consisting of a multi-sided hollow body placed in the ocean is rotated at predetermined intervals to expose the submerged surface above the sea surface, and the net from the exposed surface is removed and dried in the sun on land. A method for cleaning small aquaculture nets, characterized by: