WO2004089070A1

WO2004089070A1 - Bladder for fishing net of sea cultivation

Info

Publication number: WO2004089070A1
Application number: PCT/KR2004/000764
Authority: WO
Inventors: Sung-Yull Lee
Original assignee: Sung-Yull Lee
Priority date: 2003-04-07
Filing date: 2004-04-01
Publication date: 2004-10-21
Also published as: KR200317819Y1

Abstract

Disclosed is a bladder for fishing net of sea cultivation including: a generally hollow cylindrical container body 1 made of a low density of EVA foamed resin, the container body having a pair of loops 7 integrally formed on the outer peripheral surface thereof for tying a rope for the fishing net thereon, a concave groove 8 formed on the outer peripheral surface thereof for coupling the tied rope therewith, and a pair of locking grooves 3 formed on the inner peripheral surface thereof; and a pair of caps 4 coupled to both side ends of the container body 1, respectively, and each cap having a protruding portion 5 formed in a round shape on the outer peripheral surface thereof, whereby the protruding portion of the cap is fitted into the locking groove of the container body to define an closed space 2 within the container body 1.

Description

BLADDER FOR FISHING NET OF SEA CULTIVATION

Technical Field

The present invention relates to a bladder for fishing net

of sea cultivation that is used to allow a fishing net for

cultivating seaweed, laver, oyster and so on to be stretch in

the sea on the shore or allow the fishing net to be floated at a

predetermined position in a fishing farm, and more particularly,

to a bladder for fishing net of sea cultivation that is made of

an ethylene vinyl acetate (hereinafter, referred to as "EVA")

sponge foamed resin material exhibiting low density and high

strength properties, while not generating any environmental

pollution, unlike a conventional bladder that is made of only

Styrofoam or foamed urethane as a floating material.

Background Art

According to the prior art, a bladder for a fishing net

that is used to stretch the fishing net in the sea is of a

generally round container that is made of Styrofoam and so as to

protect the outer peripheral surface of the round container, it

has an outer casing that is made of a hard synthetic resin or a

substantially thick vinyl bag provided thereon, thereby keeping

weather resistance and obtaining protecting effects for damages.

Under the conventional construction, however, the outer

casing or the vinyl bag may be damaged or torn by external impacts such as the collision against a fishing ship, with a

result that the inner Styrofoam body is easily broken. As the protection function disappears, therefore, the term of usages of

the bladder becomes relatively short. Especially, the pieces of

the Styrofoam body are floated such that they pollute the sea

area along the shore. Up to now, however, no suitable

replacement material had been developed, and therefore, there is

a need for improvement of the bladder in reasonable ways. The

present invention has been made with various studies to solve

the above problem and as a result, it has been found that if the

bladder is formed of a low density of EVA sponge foamed material,

in place of the Styrofoam as used in the prior art, it can exert

its original function as the bladder, while preventing the

surrounding environment from being polluted.

Disclosure of Invention

Accordingly, the present invention has been made to solve

the above-described problems, and it is an object of the present

invention to provide a bladder for fishing net of sea

cultivation that can exhibit a good buoyancy capability for a

substantially long period of time during which it is always

floated in the sea, a high protection capability from external

impacts like collision against a fishing ship, a good weather

resistance capability against temperature or sunlight, and no

secondary environmental pollution generation. To accomplish the above object, according to the present

invention, there is provided a bladder for fishing net of sea cultivation including: a generally hollow cylindrical container

body made of a low density of EVA foamed resin, the container

body having a pair of loops integrally formed on the outer

peripheral surface thereof in such a manner as to be adjacent to both side ends thereof for tying a rope for the fishing net

thereon, a concave groove formed on the outer peripheral surface

of the central portion thereof for coupling the tied rope

therewith, and a pair of locking grooves formed on the inner

peripheral surface thereof in such a manner as to be adjacent to

both side ends thereof; and a pair of caps coupled to both side

ends of the container body, respectively, and each cap having a

protruding portion formed in a round shape on the outer

peripheral surface thereof to correspond to the locking groove

of the container boy, whereby the protruding portion of the cap

is fitted into the locking groove of ^' the container body to

define an closed space within the container body.

Brief Description of the Drawings

Further objects and advantages of the invention can be more

fully understood from the following detailed description taken

in conjunction with the accompanying drawings, in which:

FIG. 1 is an exploded perspective view of a bladder for

fishing net of sea cultivation according to the present invention;

FIG. 2 is a sectional view of the bladder of this

invention;

FIG. 3 is a sectional view of the bladder in which an

auxiliary floating member is filled;

FIG. 4 is an enlarged sectional view of an air pack sheet

used as the auxiliary floating member; and

FIG. 5 is a view used to describe the bladder of this

invention that is really employed in the fishing net of sea

cultivation.

Best mode for Carrying Out the Invention

Now, an explanation on the preferred embodiment of the

present invention will be in detail given with reference to

attached drawings.

FIG. 1 is an exploded perspective view of a bladder for

fishing net of sea cultivation according to the present

invention, and FIG. 2 is a sectional view of the bladder of this

invention.

The bladder of this invention is a generally hollow

cylindrical container body 1 with an inside space 2 formed

therein and is provided with a pair of caps 4 that is formed at

both side ends thereof, respectively.

The container body is made of an EVA foamed resin that

exhibits substantially high weather resistance, impact resistance and durability.

The EVA foamed resin generally exhibits low density and

high strength properties, thereby ensuring a high degree of

durability, and it also does not generate any environmental

pollution. Based upon the above properties of the EVA foamed

resin, the present invention adopts the EVA foamed resin as a

main material.

The container body 1 includes a pair of loops 7 that are

integrally formed on the outer peripheral surfaces in such a

manner as to adjacent to both side ends thereof, respectively,

for tying a rope for the fishing net thereon, one or two concave

grooves 8 formed on the outer peripheral surface of the central

portion thereof for coupling the tied rope therewith, and a pair

of locking grooves 3 formed on the inner peripheral surface

thereof in such a manner as to be adjacent to both side ends

thereof.

The cap 4 is adapted to be coupled to each of both sides of

the container body 1 and is provided with a reinforcing

protrusion 6 that is formed on the inside surface thereof such

that the cap 4 can maintain a predetermined degree of durability

and with a protruding portion 5 that is formed in a round shape

on an outer peripheral surface thereof to correspond to the

locking groove of the container boy. As a result, the protruding

portion 5 of the cap 4 is fitted into the locking groove 3 of

the container body 1. With the coupling of the container body 1 to the caps 4, a

closed space 2 is defined within the container body 1, and so as to prevent sea water from flowing into the container body 1, a waterproof adhesive material is spread sufficiently on the

sealing portion between the container body 1 and each cap 4 such that as the container body 1 is maintained at a completely

closed manner, the inside space 2 has a sufficient buoyancy

function.

In another embodiment of the present invention, on the

other hand, the inside space 2 is filled with an air pack sheet

9 that is made of vinyl paper. The air pack sheet 9 is filled in

a roll shape in the cylinder body 1.

The air pack sheet 9 is provided with a plurality of air

pockets 9a that are tightly formed between two sheets of vinyl

paper, as shown in FIG. 4, which may be used with the air pack

sheet for package that is commercially used in the market.

A reference numeral 10 denotes a fishing net.

As described above, the present invention is used for all

kinds of fishing nets used on the sea areas along the shore or

in the fishing farms, which is of the cylindrical container body

1 that forms the inside space 2 by the use of the left and right

caps 4 thereof. The bladder of this invention can be floated in

the sea by an excellent buoyancy function of the inside space

portion 2. The rope of the fishing net is fastened with the

loops 7 and the concave groove 8 of the container body 1, in the same manner as the conventional ways.

The present invention adopts the bladder for fishing net that is made of the EVA foamed resin exhibiting low density and

high strength properties and thus, the sea water is not

penetrated into the inside space 2 such that the inside space 2 exerts a high degree of buoyancy. Also, the container body 1 is

not easily damaged or broken by the external impacts such that

it exhibits an extremely good degree of expansion. As a result, even though the container body 1 collides with the sea water or

other obstacles, it can be readily returned to its original

shape. It is therefore appreciated that the present invention

displays a highly satisfactory result in terms of durability, stability, and rigidity.

In addition to the aforementioned advantages, the EVA

material is not sensitive to the sunlight or temperature changes,

with a result that the weather resistance is markedly improved

as compared with the conventional materials. This ensures long-

term usages. Especially, the EVA material does not generate any

environmental pollution causes, unlike the conventional

Styrofoam and therefore, it helps the surrounding environment

well preserved. Also, the production cost is not so high as

compared with the existing Styrofoam bladder with the plastic

outer casing, and it is therefore appreciated that the present

invention displays a highly satisfactory result in terms of

economics and practicality. With the filling of the air pack sheet 9 into the inside

space 2, on the other hand, the present invention prevents the

buoyancy of the inside space 2 from being lowered when the

container body 1 is damaged or broken.

Industrial applicability

As set forth in the foregoing, there is provided a bladder

for fishing net of sea cultivation is of a hollow cylindrical

container body that is made of an EVA foamed resin exhibiting

low density and high strength properties, with a result that the

buoyancy maintenance, durability, weather resistance, impact

resistance are greatly improved as compared with the

conventional bladder materials.

In addition, the bladder of this invention does not

generate any environmental pollution, thereby ensuring the

practicality.

While the present invention has been described with

reference to a few specific embodiments, the description is

illustrative of the invention and is not to be construed as

limiting the invention. Various modifications may occur to those

skilled in the art without departing from the true spirit and

scope of the invention as defined by the appended claims.

Claims

What Is Claimed Is :

1. A bladder for fishing net of sea cultivation,

comprising: a generally hollow cylindrical container body 1 made of a

low density of EVA foamed resin, the container body having a pair of loops 7 integrally formed on the outer peripheral

surface thereof in such a manner as to be adjacent to both side

ends thereof for tying a rope for the fishing net thereon, a

concave groove 8 formed on the outer peripheral surface of the

central portion thereof for coupling the tied rope therewith,

and a pair of locking grooves 3 formed on the inner peripheral

surface thereof in such a manner as to be adjacent to both side

ends thereof; and

a pair of caps 4 coupled to both side ends of the container

body 1, respectively, and each cap having a protruding portion 5

formed in a round shape on the outer peripheral surface thereof

to correspond to the locking groove of the container boy,

whereby the protruding portion of the cap is fitted into the

locking groove of the container body to define an closed space 2

within the container body 1.

2. A bladder for fishing net of sea cultivation according

to claim 1, wherein the inside space 2 of the container body (1)

is filled with an air pack sheet (9) that is adapted to maintain

buoyancy.