KR102642125B1 - Fishing net weight made of biodegradable resin so that it can be separated from the net and method for manufacturing the same - Google Patents

Abstract

The present invention consists of a net weight that holds the center of gravity and a biodegradable resin body, so that the net and net weight can be separated over time when fishing gear is discarded, so that waste nets can be easily collected. This relates to a sea net weight for fishing gear, in which a hollow part is formed to penetrate the center of the net weight body, and the rope at the edge of the net of fishing gear used for fishing is inserted into the hollow part and fixed to the weight of the net weight body. In the sea net weight for fishing gear that induces the lower part of the fishing gear to be submerged underwater, the net weight body is a weight made of a material with a higher specific gravity than water so that the net can be submerged in water, and a weight to support the weight. It is composed of a double support body, and the weight body is made of metal, and the support body is molded to surround the weight body so that the weight body is fixed in place along the circumference of the hollow portion. The support body is biodegradable in water over time. By making it with biodegradable resin, the weight separates in the water and passes through the net, and the net weight holding the rope disappears, allowing the waste net to float to the surface, greatly reducing the weight of the waste net and making it easy to collect the waste net that floats to the surface. This is to significantly reduce collection costs and prevent marine pollution.

Description

Fishing net weight made of biodegradable resin so that it can be separated from the net and method for manufacturing the same}

The present invention relates to a sea net weight for fishing gear that is separated from the net by biodegradation. More specifically, the material of the net weight is composed of a weight that holds the center of gravity and a biodegradable resin body, so that it can be used when fishing gear is discarded. This relates to a sea net weight for fishing gear that allows the net and net weight to be separated over time so that waste nets can be easily collected.

In general, a variety of fishing methods are used to catch fish in the sea, such as stationary net fishing and purse seine fishing. Depending on the fishing method, various types of fishing gear such as trawl nets, trawl nets, purse seines, offshore gill nets, and traps are used. do.

In addition, fishing gear used for fishing activities requires nets to be hung underwater to catch fish, so net weights are installed at the bottom so that the nets can easily sink below the surface. Most net weights are heavy compared to their volume. It is made of heavy metal.

If such fishing gear is used for a long period of time, the net will corrode and age and must be replaced. Even in the case of stationary nets, the net must be collected and a new net thrown in before use.

However, because the work of collecting nets is very cumbersome, there is a problem that fishermen end up discarding nets that should be discarded after collection, as they are thrown into the sea. Additionally, various types of fishing gear are discarded in the sea due to various factors such as loss due to typhoons. There is a problem of being left unattended in the ocean.

In addition, so-called 'ghost fishing' occurs in which various marine species become entangled in abandoned fishing gear and die, and marine habitats and spawning grounds are destroyed, causing the problem of polluting the ocean, and the entire amount of fishery resources consumed by ghost fishing is used. Because it takes up a large portion of resources, significant industrial and financial losses occur every year.

In particular, nets used in fishing gear are made of synthetic fibers such as polyethylene or nylon. As these materials age while immersed in seawater for a long period of time, they generate microplastics, which sea creatures mistake for food and ingest, further damaging the nets. When humans consume marine life, plastic naturally accumulates in the body, threatening human health.

In addition, accidents in which discarded nets become entangled in the propellers of sailing ships, causing navigational difficulties, continue to occur every year, and discarded nets are not properly organized to the extent that many of the maritime distress accidents occur due to discarded nets.

Therefore, efforts to dispose of waste nets are made from various angles, and the most commonly used method of disposing waste nets is to collect and dispose of waste nets at sea using a crane, etc., in which divers go into the water and remove waste nets. The work is very difficult because it has to be collected by hanging it on a crane hook and lifting it above the water.

In particular, when the coastal water depth is about 20 to 30 m, divers can enter and work, but as the depth of the sea increases, it becomes more difficult for divers to work, so separate high-tech equipment must be used, which not only makes the collection work excessively cumbersome. In addition, it is difficult to recover waste nets because the costs are too high.

Therefore, recently, as disclosed in Patent No. 10-2032388 (2019.10.08.), a method of manufacturing nets using eco-friendly decomposable materials has been used. However, these nets are not strong, so they are easily broken or broken. There are many difficulties in use due to the lack of flexibility in movement, people are reluctant to use the net at work sites, and it is difficult to properly activate it because the net is still used as it was in the past, solving the existing environmental, cost, and safety problems. Another method is required to do this.

The present invention is intended to solve the above problems, by manufacturing net weights using biodegradable materials and allowing the net weights and nets to separate over time while fishing gear is left in the water, so that the spent nets are kept at the surface. This allowed the net to float and be easily collected from the sea.

In addition, when the material that makes up the net weight biodegrades, the net weight and the net are structurally separated.

The present invention, as a technical idea for achieving the above object, is a hollow part formed to penetrate the center of the net weight body, and the rope of the net edge of the fishing gear used for fishing is inserted into the hollow part and fixed to the net weight body. In the sea net weight for fishing gear that induces the lower part of the fishing gear to be submerged underwater by the weight of the net weight, the net weight body includes a weight made of a material with a higher specific gravity than water so that the net can be submerged in water, and the weight body. It is composed of a double support body for support, and the weight body is made of metal, and the support body is molded to surround the weight body so that the weight body is fixed in place along the circumference of the hollow portion. The support body may be damaged over time. By making it with a biodegradable resin that biodegrades in the water, the heavy body separates in the water and passes through the net, and the net weight holding the rope disappears, allowing the waste net to float to the surface, greatly reducing the weight of the waste net and making it easy to collect. .

According to the sea net weight for fishing gear that is separated from the net by biodegradation of the present invention, when fishing gear consisting of a net structure is left in the sea, the biodegradable resin constituting the net weight decomposes and the net is used to cause the fishing gear to sink in the water. As the weight separates, the heavy body (piece of metal) passes through the net, and as the net weight is removed, the waste net floats to the surface. This prevents the problem of ghost fishing in the water, residual pollution, protects the environment, and protects the environment. By efficiently removing obstacles to ship operation at sea, it is possible to operate safely.

In addition, since the net weight is removed while the fishing gear is floating on the surface of the water, the weight of the fishing gear becomes very light, so workers can easily collect waste nets by hanging them on a hook on the water, which greatly improves workability and minimizes the use of equipment. Collection costs can be greatly reduced, and nets can be easily disposed of without the need for separate collection.

Figure 1 is a structural diagram of fishing gear to which the net weight of the present invention is applied.
2 and 3 are cross-sectional structural diagrams of the net weight of the present invention
Figure 4 is a state diagram in which the net weight of the present invention is separated from the rope by biodegradation
Figure 5 is another embodiment of the weight built into the net weight of the present invention
Figure 6 is a manufacturing flow chart of the net weight of the present invention
7 to 9 show other examples of the support of the present invention.
Figure 10 is an exploded perspective view showing the structure of a net weight according to another embodiment of the present invention
Figure 11 is a cross-sectional structural diagram of Figure 10
Figure 12 is a manufacturing flow chart of the net weight of Figure 11

Hereinafter, the present invention will be described in detail with reference to the attached drawings.

The sea net weight 1 for fishing gear of the present invention is a fishing gear used for fishing in which a hollow portion 200 is formed to penetrate the center of the net weight body 100, as shown in FIGS. 1 to 3. A sea net weight for fishing gear that is fixed by inserting the rope (R) at the edge of the net (N) into the hollow part (200) of the net weight to induce the lower part of the fishing gear to be submerged underwater by the weight of the net weight body (100). As a technology related to (1), the net weight body 100 is composed of a weight body 120 and a support body 140 and provides a biodegradable function so that the net weight 1 can be separated from the fishing gear and the net can be easily collected. It is characterized by being

First, the net weight (1) is fixed by hanging on the rope (R) of the part that supports the edge of the net, such as the foot line, lanyard, or riser line of the fishing gear, and induces the net to sink in the water. It has a rectangular shape. A buoyancy material such as a moxa is attached to the upper part of the band-shaped net (N), and a sinking material such as a net weight (1) is attached to the lower part, so that the net is deployed vertically, as well as the wing net or bag net of a trawl net or trawl net. It can be used for a variety of purposes as a sinking material that allows nets such as fish to sink underwater.

In addition, as a structure for fixing the net weight (1) by hanging it on a rope (R), the net weight body 100 is made of a cylindrical structure, and a hollow part 200 penetrates in the longitudinal direction in the center of the net weight body 100. is formed, and the net weight 1 can be installed as a settling material by inserting a rope into the hollow part 200.

At this time, the net weight body 100 includes a weight 120 made of a material with a higher specific gravity than water to induce the net N to sink in water, and the weight 120 is arranged in a circular shape. It is dually composed of a support body 140 for support.

In addition, the weight body 120 is preferably made of metal such as carbon steel such as iron, and two or more weight bodies 120 are arranged radially in an equal division structure along the circumference of the hollow portion 200. , the support body 140 is formed to surround the weight body 120 so that the weight body 120 can be fixed in position along the circumference of the hollow portion 200.

At this time, the support 140 is biodegradable in the water over time so that the weight 120 is separated in the water and passes through the net, and the net weight holding the rope disappears, allowing the waste net to float to the surface. It can be manufactured by molding with resin.

That is, the support 140 is molded so that a plurality of weight bodies 120 are arranged adjacent to each other and biodegradable resin is filled between them, so that the weight body 120 is fixed by the support body 140. The status quo will be maintained.

At this time, the weight body 120 uses a weight body divided into two pieces or a weight body divided into three or four pieces, and the surface is made of a biodegradable resin material to form a cylindrical net weight (1). It can be manufactured, and a plurality of weights 120 of the same size and weight are arranged radially at equal intervals around the hollow portion 200, so that the net weight 1 is eccentric to one side. This allows you to maintain your center of gravity.

And since the support 140 is made of a biodegradable material, the support 140 biodegrades over time while the waste net is left in the sea, and after a certain period of time, the biodegradable resin as shown in FIG. 4 As the weight 120 melts and separates, the net weight 1 releases its hold on the rope, allowing the net to float above the sea.

At this time, the weight 120 can minimize the weight of the fishing gear by allowing each piece to pass through the net when the support 140 of the net weight 1 is biodegraded. To this end, the weight 120 of the weight 120 is used to minimize the weight of the fishing gear. The smaller the size, the easier it is for the weight to slip through the mesh. However, if the mesh 1 is made of too many pieces, molding is impossible or the work during the production process becomes very cumbersome and manufacturing becomes difficult.

Therefore, the size of the weight body 120 can be made relatively smaller than the mesh size of the net of the corresponding fishing gear, so that the weight body 120 can easily pass through the net, and the weight body 120 can pass through the net. By molding the net weight as large as possible within the limit that can escape, the divided pieces of the weight body 120 can be minimized while ensuring that the net weight has a constant weight.

Meanwhile, the manufacturing method of the sea net weight 1 for fishing gear having the above structure will be described in detail as follows.

As shown in FIG. 6, the present invention includes a weight preparation step (S100) for manufacturing the weight body 120, a mold placement step (S200) for molding the weight body 120 and the support 140, and a weight The net is made by including a molding preparation step (S300) of seating the sieve 120 in the mold, a biodegradable resin preparation step (S400), and an insert molding step (S500) of injecting the biodegradable resin into the mold. Weights can be manufactured.

The heavy body preparation step (S100) is a step of manufacturing a plurality of heavy bodies by cutting metal raw materials to a predetermined length and width and cutting or casting the heavy bodies. As described above, it is manufactured using carbon steel as a raw material. By doing so, the net can be induced to sink due to its weight, and the raw material can be cut by press molding or made into a casting, and preferably SC45C material can be used.

The mold placement step (S200) is a step of manufacturing a mold and mounting the mold on a molding device so that a plurality of weights can be arranged with respect to the unit net weight to be molded. A plurality of seating grooves are formed in the mold to accommodate a plurality of weights. It is provided so that a sieve can be inserted.

Then, a molding preparation step (S300) is performed in which the weight fabricated in the weight body preparation step is inserted into the molding mold thus manufactured.

In the molding preparation step (S300), a plurality of weights are placed on the unit net weight, which is each molding object. For example, a plurality of weights are placed in various quantities such as 2 pieces, 3 pieces, and 4 pieces on one net weight molding object. Prepare for molding by seating the sieve in the correct position.

At this time, when the mold is opened in the molding device, the product is taken out and removed by a runner. The weight is manually inserted into the correct position or automatically transferred by a separate transfer mechanism to enter the mold and then placed in the correct position. It can be fixed.

If you want to manually insert a weight into the mold, place the weight, which is an insert member, on a separate jig and then push the jig into the core of the mold to position it so that all of the insert members can fit in at once. .

The biodegradable resin preparation step (S400) is a step of preparing raw materials for molding the support 140 for applying the surface of the weight body 120. The biodegradable resin is prepared under certain conditions after using the final manufactured product. Various resins that are biodegradable by microorganisms existing in the natural world can be used. It is a biodegradable plastic that can be completely decomposed by microorganisms or decomposition enzymes under certain conditions and can be made from biomass or fossil fuel-based compounds.

The insert molding step (S500) is a step in which biodegradable resin is injected into the mold of the molding device to mold a plurality of weights into one net weight, and the resin raw material is automatically supplied to the hopper and molding is performed. , it is carried out continuously and repeatedly, allowing the net weight to be manufactured repeatedly.

At this time, as shown in FIG. 7, the net weight body 100 may have an uncoated portion 142 formed in a portion of the support body 140 by a mold structure for supporting the inserted weight body 120. , by having a structure in which a part of the weight body 120 is exposed, the workability of molding can be greatly improved by temporarily fixing the insert member during insert molding.

As shown in FIG. 8, the uncoated portion 142 may be formed in a form where the end of the weight 120 is exposed in the longitudinal direction of the net weight. When configured to be exposed in this way, the position of the weight 120 With is set, the molding structure of the support 140 can be simplified.

That is, the molding structure can be simplified because the support 140 can be molded after being seated in the mold of the molding device using the exposed uncoated portion 142 at the end as a guide. In this case, the weight body 120 ) is wrapped by the support 140 and forms the surface on which it is applied in an uneven shape, thereby tightening the bond between the weight 120 and the support 140, and forming a bond between the weight 120 and the support 140 by physical external force. ) can be prevented from being randomly separated and durability can be improved.

In addition, as shown in FIG. 9, the net weight body 100 is arranged so that the plurality of weights 120 are in contact with the diameter of the hollow portion 200, and the support body 140 has a plurality of weights 120 ) can be manufactured to have a structure in which it is applied to surround the outer surface of the heavy body 120 and between neighbors, so that the support 140 is not damaged by the rope and the metal is rubbed against the rope and is worn away by physical force. While preventing the support 140 from occurring, the net weight body 100 can be made to have a separate structure only by biodegradation.

Meanwhile, Figures 10 and 11 are diagrams showing a structure in which the weight body 120 and the support body 140 are manufactured to have a dual structure by another manufacturing method of the net weight of the present invention, and as shown in the drawings, the net weight The main body 100 is composed of a support body 140 divided into a first body 140a and a second body 140b, and a weight body 120 is placed in the socket 144 formed in the first and second bodies 140a and 140b. It can be manufactured by combining the first and second bodies 140a and 140b with the inserted state.

At this time, the support body 140 is formed by separately molding the first body 140a and the second body 140b, and a socket for inserting the weight body 120 into the first body 140a and 140b, respectively. It can be manufactured by forming (144), inserting the weight body 120 into the support body 140, and then combining them.

At this time, the first and second bodies (140a, 140b) can be bonded by ultrasonic bonding, etc., and at this time, the contact area of the corresponding surface where the first and second bodies (140a, 140b) are engaged with each other is increased. A stepped portion 146 may be formed as a structure to ensure in-position assembly.

The manufacturing method of the sea net weight for fishing gear (1), which has a separate structure, will be described in detail as follows.

As shown in FIG. 12, the manufacturing method of the sea net weight (1) for fishing gear of a separate structure includes a weight body preparation step (S1000) of manufacturing the weight body 120, a biodegradable resin preparation step (S2000), and a weight A support forming step (S3000) for fixing the body 120, an assembly step (S4000) for inserting and fixing the weight body 120 in the support body 140, and a state in which the weight body 120 is accommodated in the support body 140. It may be configured to include a support adhesion step (S5000) of fixing.

The weight body preparation step (S1000) is a step of manufacturing a plurality of weight bodies by cutting metal raw materials to a predetermined length and width and cutting or casting the weight bodies. As described above, it is manufactured using carbon steel as a raw material. By doing so, the net can be induced to sink due to its weight, and the raw material can be cut by press molding or made into a casting, and preferably SC45C material can be used.

The biodegradable resin preparation step (S2000) is a step of preparing raw materials for molding the support 140 for applying the surface of the heavy body 120. The biodegradable resin is used at a certain level after using the final manufactured product. A variety of resins can be used that are biodegradable by microorganisms existing in nature under certain conditions. It is a biodegradable plastic that can be completely decomposed by microorganisms or decomposition enzymes under certain conditions and can be made from biomass or fossil fuel-based compounds.

The support molding step (S3000) is a step of molding a divided support unit using the biodegradable resin prepared in the biodegradable resin preparation step, preferably the support 140 constituting the exterior of the net cone body 100. can be individually molded to consist of first and second bodies 140a and 140b of a bisecting structure.

At this time, the first and second bodies (140a, 140b) can be manufactured in the same form, but for robust assembly and adhesion, the first and second bodies (140a, 140b) are assembled by interlocking with each other in a male and female structure. It can prevent damage from shock or external force during fishing operations, prevent random separation, and ensure that decomposition occurs only through biodegradation.

In addition, the first and second bodies 140a and 140b of each divided structure are integrally formed with pockets 146 having an internal structure so that the weight body 120 can be inserted.

At this time, the pocket 146 is configured so that the pockets 146 are arranged at equal intervals along the circumference of the hollow portion 200.

The assembly step (S4000) is a step of inserting a weight into the support manufactured in the support molding step, and assembling a plurality of weights 120 into the unit weight to be manufactured, that is, one net weight, for example, In order to arrange a plurality of weight bodies in the correct position in various quantities such as 2 pieces, 3 pieces, or 4 pieces in one net weight molding object, the weight body 120 is inserted into the pocket 146 and assembled.

At this time, the inner diameter of the pocket 146 is formed to be relatively larger than the outer diameter of the weight body 120, so that the weight body 120 can be easily inserted into the pocket 146 without using separate tools or equipment in the assembly step (S4000). You can.

The support adhesion step (S5000) is a step of adhering the support divided into the state in which the weight body 120 is inserted in the assembly step (S4000), and the first and second bodies 140a and 140b are manufactured by ultrasonic fusion. This can be done.

At this time, a step portion 146 is formed on the corresponding surface where the first and second bodies 140a and 140b are engaged with each other, so that the first and second bodies are assembled with each other while the first and second bodies are fitted to the adhesive device. Pressure fixation is achieved while limiting the flow width, and adhesion can be achieved to maintain a firm airtightness by greatly increasing the contact area.

1: net weight
100: Net weight body
120: heavy body
140: Support 140a: First body 140b: Second body
142: Uncoated area 144: Socket
200: Ministry of SMEs and Startups

Claims (8)

A hollow part 200 is formed to penetrate the center of the net weight main body 100, and the rope (R) on the edge of the net (N) of fishing gear used for fishing is inserted into the hollow part and fixed to form the net weight main body. In the sea net weight (1) for fishing gear that induces the lower part of the fishing gear to be submerged underwater by the weight of,
The net weight body 100 is composed of a weight body 120 made of a material with a higher specific gravity than water so that the net can be submerged in water, and a support body 140 for supporting the weight body 120,
The weight body 120 is made of metal, and the support body 140 is formed to surround the weight body so that the weight body 120 is fixed in place along the circumference of the hollow portion 200,
The support 140 is a biodegradable resin that biodegrades in water over time so that the weight 120 is separated in the water and passes through the net, and the net weight holding the rope disappears, allowing the waste net to float to the surface. molded,
The weight body 120 is arranged radially in a plurality of equal parts along the circumference of the hollow portion 200,
The support body 140 is a sea net weight for fishing gear that is separated from the net by biodegradation, characterized in that the support body 140 is formed by filling a biodegradable resin between the plurality of weight bodies 120 adjacent to each other. The sea net weight for fishing gear according to claim 1, wherein the weight body (100) is separated from the net by biodegradation, wherein the weight body (120) is made of carbon steel. According to claim 2, wherein the net weight body 100 is a net and a net through biodegradation, characterized in that an uncoated portion 142 is formed on the support 140 by a mold structure for supporting the inserted weight 120. Separate sea net weight for fishing gear. The method of claim 3, wherein the net weight body 100 is arranged such that a plurality of weight bodies 120 are in contact with the diameter of the hollow portion 200,
The support 140 is a sea net weight for fishing gear that is separated from the net by biodegradation, characterized in that it is composed of a structure applied to surround the outer surface of the plurality of weight bodies 120 and the adjacent weight body 120. The method of claim 2, wherein the net weight body 100 is composed of a support body 140 divided into a first body 140a and a second body 140b, and sockets formed on the first and second bodies 140a and 140b. A sea net weight for fishing gear that is separated from the net by biodegradation, characterized in that it is manufactured by combining the first and second bodies (140a, 140b) with the weight body (120) inserted into (144). The method of claim 5, wherein a socket 144 for inserting the weight 120 is formed in the first and second bodies 140a and 140b, and the weight 120 is inserted into the support 140 and then adhered. A sea net weight for fishing gear that is separated from the net by biodegradation, characterized in that it is manufactured. A heavy body preparation step of manufacturing a heavy body by cutting metal raw materials to a predetermined length and width;
A mold placement step of manufacturing a molding mold and mounting it on a molding machine so that a plurality of weights can be arranged radially in an evenly divided structure with respect to the unit net weight to be molded;
A molding preparation step of inserting the weight produced in the weight body preparation step into a molding mold and seating a plurality of weights with respect to the unit net weight, which is each molding object;
Biodegradable resin preparation step;
An insert molding step of inserting a biodegradable resin into the mold so that a plurality of adjacent weights for one net weight are integrally molded with the biodegradable resin filled therein;
A method of manufacturing a sea net weight for fishing gear that is separated from the net by biodegradation produced by . A heavy body preparation step of manufacturing a heavy body by cutting metal raw materials to a predetermined length and width;
Biodegradable resin preparation step;
A support molding step of injection molding a support composed of first and second bodies of a divided structure with pockets formed to fix a weight body with a biodegradable resin;
An assembly step of inserting and fixing a weight in a pocket formed in the support manufactured in the support molding step;
A support bonding step of interlocking the first and second bodies with a weight accommodated in the support and fixing them by ultrasonic fusion;
A method of manufacturing a sea net weight for fishing gear that is separated from the net by biodegradation produced by .

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