JP2003052273A - Sink-and-float type crawl - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sink-and-float type crawl capable of easily replacing the net part of the crawl and excellent in shape holding properties. SOLUTION: This sink-and-float type crawl has a holding frame 17 to hold the shape of the net part 13 of the crawl, and the net part 13 of the crawl is detachably mounted on the holding frame 17.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a float-and-sink type cage, and more particularly, it has a float for imparting a predetermined buoyancy to a cage net. The present invention relates to a float-and-sink type cage that is capable of floating and sinking the cage net through exhaust air.

[0002]

2. Description of the Related Art Conventionally, in the cultivation and cultivation of fish such as fish and shrimp using fish cages, the fish in the fish cages are moved to a desired tidal current position, the deposits on the fish cages are removed, and the fish cages are removed. From the viewpoint of convenience of putting fish in and out of the cage,
A floating and sink type cage was used to move the cage to the desired depth.

FIG. 6 shows the basic structure of such a float-and-sink type cage 1 which has been conventionally adopted. The float-and-sink type cage 1 has a cage net 2 for surrounding fish. The fish cage net portion 2 is formed of a flexible member such as a wire net or a net used for a general fishing net.

A float 3 for imparting a predetermined buoyancy to the cage net 2 is arranged at the peripheral edge of the cage net 2 on the upper end side in FIG. The float 3 is formed of a rigid body of metal or the like into a substantially annular plane shape.

Further, the float 3 has a hollow structure, and air can be injected or exhausted therein by a compressor, a pump or the like via the injection / exhaust section 5. And the float 3
The buoyancy can be changed according to the injection amount of air.

Although not shown, in addition to the structure in which the buoyancy is adjusted only by the amount of air injected into the inside as in the float 3, the buoyancy is adjusted by the amount of water supplied to the inside, or It is possible to supply both air and water, and a configuration is adopted in which the buoyancy is adjusted by the balance between the two.

[0007]

However, in the conventional float-sink type cage 1, when the flexible cage net 2 is used as the cage net 2, the handling of the cage net 2 at the time of setting or taking-in is performed. There was a problem of lack of sex.

Further, when the flexible cage net portion 2 is used, the cage net portion 2 cannot maintain its original shape properly due to the pressure of the water flow during the tidal current or towing, and the cage which is deformed by the water flow. Since the fish may come into contact with the net portion 2, there is a problem that it is not possible to form an environment in which the fish in the fish cage net portion 2 can live easily.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a float-sink type cage which allows easy exchange of the cage net portion and has good shape retention. It is a thing.

[0010]

In order to achieve the above object, the feature of the float-sink type cage according to claim 1 of the present invention is to have a holding frame for holding the shape of the net cage. The point is that the fish cage net is removable.

By adopting such a structure, the shape of the cage net can be held by the holding frame, and by attaching and detaching the cage net part to the holding frame, the cage net part can be removed. Exchange can be performed easily.

A feature of the float-sink type cage according to claim 2 is that, in claim 1, a guide rope for holding the float-sink operation of the cage net is provided.

By adopting such a construction, it is possible to properly and smoothly perform the floating and sinking operation of the cage net without being swept away by the tidal current, and to properly install the cage net at the desired water depth position. You can

A feature of the float-sink type cage according to claim 3 is that in claim 1, the cage net can be moved to a desired tidal current position by towing.

By adopting such a structure, the fish in the net cage can be moved to a desired tidal current position, and a more suitable aquaculture environment can be formed.

A feature of the float-sink type cage according to claim 4 is that in claim 3, at least the upstream side portion of the holding frame in the towing direction is pressed by the water flow during the towing of the cage net part. The resistance member is provided to prevent deformation in the direction in which the volume inside the cage net decreases.

By adopting such a structure, it is possible to reduce the influence of the water flow acting on the cage net through the resistance member, so that the shape retention of the cage net is further improved. You can

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a float-and-sink type cage according to the present invention will be described below with reference to FIGS. 1 to 5.

As shown in FIGS. 1 and 2, the float-sink type cage 10 according to this embodiment has a flat annular float 11 for imparting buoyancy to the cage net 13. A plurality of flexible tubes 12 (four in FIG. 2) having a hollow structure are built in the float 11, and each tube 12 has an injection / exhaust section capable of injecting or exhausting air. 9 are provided.

Further, as shown in FIG. 2, a long tubular ventilation means 14 such as a hose is connected to each injection / exhaust section 9, and the upper end of each ventilation means 14 is exposed on the water surface. ing. An injection / exhaust port 15 for injecting or exhausting air is formed at an upper end portion of the ventilation means 14, and the air is injected or exhausted to / from the tube 12 via the injection / exhaust port 15. You can do it.

Therefore, the float-sink type cage 12 can perform the float-sink operation by injecting and exhausting air into each tube 12. Further, by adjusting the amount of air injected into the tube 12, the cage net 13 can be held at a desired water depth position.

Further, the floating and sink type cage 1 in this embodiment.
Reference numeral 0 indicates a holding frame 17 made of a material having a certain rigidity, such as metal, for holding the shape of the cage net 13.
have.

The holding frame 17 is the float 1
1 has a circular upper annular frame portion 18 formed to have a diameter smaller than that of the float 11, and the upper annular frame portion 18 is provided with a plurality of connecting members 19 such as hooks and cords. And is detachably connected to the inner peripheral edge of the float 11.

A fence-shaped frame portion 20 forming a part of the holding frame 17 is vertically provided on the upper annular frame portion 18, and the fence-shaped frame portion 20 extends vertically downward in FIG. It is formed by arranging a plurality of rod-shaped bodies 20a or hollow tubular bodies (not shown) such as pipes arranged side by side at predetermined intervals in the circumferential direction of the upper annular frame portion 18. The number of rod-shaped bodies 20a and the interval between the rod-shaped bodies 20a may be appropriately changed according to the design concept.

When the fence-shaped frame portion 20 is formed of a hollow tubular body such as the above-mentioned pipe, a plurality of small holes are appropriately bored in the tubular body and the tubular body is supplied with a compressor or the like. The air supply means may be connected so that the air supply means discharges air (air bubbles) from the inside of the tubular body to the outside water through each small hole.

By forming the holding frame 17 in this way, the holding frame 17 can be provided with a function as so-called aeration.
Prevent the debilitating of fish in the cage net 13 held in 7,
A more suitable aquaculture environment can be formed.

It should be noted that not only the fence-shaped frame portion 20, but the entire holding frame 17 including the upper annular frame portion 18 and the lower annular frame portion 22 which will be described later is formed into a hollow tubular shape having a plurality of small holes. Formed on the holding frame 17
You may make it provide the above-mentioned aeration function as a whole.

Further, a lower annular frame portion 22 having substantially the same diameter as that of the upper annular frame portion 18 forming a part of the holding frame 17 is arranged at the lower end portion of the fence-shaped frame portion 20 in FIG. Has been done.

Inside the holding frame 17, the fish cage net portion 13 is connected to the net portion connecting means 16 such as a hook or a string.
It is arranged so as to be detachable.

Therefore, since the cage net portion 13 is held in water from the outside by the holding frame 17, the cage net portion 13 is pressed by the tidal current.
It is possible to prevent the deformation.

Further, the cage frame 13 for holding the cage net 1 is used.
Since the cage net 13 can be easily replaced by attaching and detaching it to and from the handle 7, handleability can be improved.

The holding frame 17 is provided with a plurality of weights 23 for sinking the cage net 13 into the water, and the position of the balance between the gravity of the weights 23 and the buoyancy of the float 11. However, the water depth position of the cage net 13 is determined. The weight 23 is not necessarily required as long as the holding frame 17 can sufficiently sink due to its own weight.

As shown in FIG. 3, a guide rope 25 for holding the floating / settling operation of the cage net portion 13 is formed in the cage net portion 13 in a pair of upper and lower portions formed in the center of the cage net portion 13. It penetrates through the through holes 26a and 26b. A float 28 for imparting buoyancy to the upper end of the guide rope 25 is connected to the upper end of the guide rope 25, and an anchor 29 that sinks the lower end of the guide rope 25 is provided at the lower end. It is connected.

As a result, the guide rope 25 is held in a state of standing substantially vertically to the water surface, and the floating / sinking operation of the cage net 13 along the guide rope 25 is ensured. It has become.

The ventilation means 14 has an annular holding means 3 so that the ventilation means 14 is prevented from flowing by a tidal current.
It may be held near the guide rope 25 by 0.

As shown in FIG. 4, the cage net 13 is
It can be connected to a fishing boat 32 via a towline 31 such as a rope in a state where the engagement with the guide rope 25 is released. Therefore, the fishing boat 32 can tow the cage net portion 13.

Therefore, the fish in the cage net 13 can be moved to a desired tidal current position, so that the influence of red tide and the like can be avoided and an environment suitable for aquaculture can be formed.

Further, in the present embodiment, a plurality of flat resistance members 34 (three in FIG. 1) are provided on the upstream side of the holding frame 17 in the towing direction, and each of the rod-shaped members of the fence-shaped frame portion 20. It is detachably arranged so as to be bridged between the 20a. These resistance members 34 are
For example, it may be formed of a flexible member such as a canvas material which is easy to handle.

The resistance members 34 are the same as the cage nets 13 described above.
At the time of towing, by being located on the upstream side of the upstream end surface of the net cage portion 13 in the towing direction, it is possible to prevent the water flow from directly contacting the upstream end surface of the cage net portion 13. ing.

Therefore, during towing, the pressure of the water flow acting on the net cage 13 can be relaxed, and during towing, the net cage 13 is deformed in the direction of decreasing the volume due to the pressure of the water flow. Can be prevented.

The forming position and the number of forming the resistance member 34 can be appropriately changed according to the design concept, but from the viewpoint of most efficiently mitigating the influence of the water flow during towing, at least the resistance member 34 is formed. The member 34 is preferably provided on the upstream side portion of the palisade frame portion 20 in the towing direction.

Next, the operation of this embodiment will be described.

First, in the initial state, it is assumed that the floating and sinking type cage 10 is fried on a ship and the cage frame 17 is not attached with the cage net portion 13.

Next, when the floating-settling cage 10 is installed in the water from the initial state, the cage net portion 13 is attached to the inside of the holding frame 17, and the fish prepared in advance is discharged into the cage net portion 13. .

At this time, by simply attaching the cage net portion 13 to the holding frame 17, the cage net portion 13 can be easily and quickly tailored to a predetermined shape, so that the float-sink type cage 10 can be easily handled.

After the cage net 13 is submerged in water, the cage net 13 sinks to the bottom of the water along the guide rope 25 due to the gravity of the weight 23 arranged on the holding frame 17. To do.

The settling cage net portion 13 has the gravity caused by the holding frame 17 including the weight 23 and the float 11
Stop the sedimentation at the position where the force balance with the buoyancy of
Secure a specified water depth position. At this time, the net cage 1
If it is desired to further settle 3, the air may be exhausted from the inside of the tube 12 of the float 11 via the ventilation means 14. On the other hand, when it is desired to float the cage net 13, the air may be injected into the tube 12.

This makes it possible to easily adjust the water depth position.

Since the cage net 13 is held from the outside by the holding frame 17 in a state where the cage net 13 is held at a predetermined water depth position,
Even when it is pressed by a water current such as a tidal current, it can retain the original shape of the attachment.

Therefore, the fish in the fish cage net portion 13 is not affected by the deformation of the fish cage net portion 13 such as abutting on the deformed fish cage net portion 13, so that an environment where fish can easily live is properly formed. You can

The cage net portion 13 is provided with an anchor 29.
And the guide rope 25 to which the float 28 is attached
Since it is held at a predetermined tidal current position, the cage net 13 is not swept by the tidal current.

Next, when moving the cage net portion 13 to another tidal current position, air is injected into the tube 12 of the float 11 to float the cage net portion 13 on the water surface,
The guide rope 25 penetrating the cage net 13 is pulled out from the cage net 13.

Then, as shown in FIG. 4, the fish cage net portion 13 is connected to a fishing boat 32 via a tow rope 31.

After the fishing net 32 is connected to the fishing boat 32, the fishing boat 32 is moved in a predetermined towing direction to start towing the fishing net 13.

At this time, since the cage net portion 13 is held from the outside by the holding frame 17, it is possible to prevent the cage net portion 13 from being deformed by the water flow at the time of towing.

Further, since the resistance member 34 is disposed on the upstream side of the holding frame 17 in the towing direction, the resistance member 34 makes the towing direction of the cage net 13 particularly susceptible to the water flow. It is possible to prevent the water flow from directly acting on the upstream end surface.

Therefore, since the holding frame 17 and the resistance member 34 can tow the cage net portion 13 while keeping the volume inside the cage net portion 13 constant, the fish in the cage net portion 13 can be protected. The density can be kept constant. Therefore, the fish does not come into contact with the cage net 13 due to the increase in the density of the fish in the cage net 13 with the decrease in the volume inside the cage net 13.

Next, when the cage net portion 13 cannot be used properly due to abrasion or the like, the cage net portion 13 is used.
In this case, first, the cage net 13 held at a predetermined water depth position is first floated on the water surface by injecting air into the tube 12 of the float 11. Then, after the fish in the fish cage net portion 13 is transferred to another fish cage or the like, the fish cage net portion 13 is pulled up on the ship. Then, the cage net portion 13 may be removed from the holding frame 17 and a new cage net portion 13 may be folded.

Therefore, the cage net 13 can be replaced easily and quickly.

Therefore, according to the present embodiment, by attaching and detaching the cage nets 13 to and from the holding frame 17, it is possible to easily and quickly install the float-and-sink type cages 10 or replace the cage nets 13. It is possible to improve the property.

Further, since the shape of the fish cage net portion 13 in water can be kept constant by the holding frame 17, an environment where fish can easily live can be properly formed.

Further, since the resistance member 34 can reduce the influence of the water flow at the time of towing the cage net portion 13, the shape of the cage net portion 13 can be held more appropriately in cooperation with the holding frame 17. It is possible to properly form an environment in which fish in the cage net 13 can easily swim even during towing.

The present invention is not limited to the above-mentioned embodiment, but various modifications can be made as necessary.

For example, the shape and material of the holding frame 17 may be appropriately changed according to the design concept.

Furthermore, for example, when a plurality of float-and-sink type cages 10 are collectively installed at a predetermined tidal current position, as shown in FIG. 5, the floats 28 of the respective float-and-sink type cages 10 are connected by a connecting means 36 such as a rope. You may do it. In this case, each floating and sink type cage 10 can be more properly held at a predetermined tidal current position.

[0066]

As described above, according to the float-and-sink type cage according to claim 1 of the present invention, it is possible to improve the handleability and properly form an environment in which fish in the cage net can live easily. It is possible to cultivate high quality fish.

According to the float-sink type cage according to claim 2, in addition to the effect of the float-sink type cage according to claim 1, the float-sink operation of the cage net can be performed more properly and smoothly. It can be properly installed at a desired water depth position.

According to the float-and-sink type cage according to claim 3, in addition to the effect of the float-and-sink type cage according to claim 1, it is possible to provide a better aquaculture environment by moving fish to a desired tidal current position. it can.

According to the float-and-sink type cage according to claim 4, in addition to the effect of the float-and-sink type cage according to claim 3, it is possible to form an environment in which fish in the cage net can easily swim during towing. Further, it is possible to provide a better aquaculture environment.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a float-and-sink type cage according to the present invention.

FIG. 2 is a plan view showing an embodiment of a float-and-sink type cage according to the present invention.

FIG. 3 is a side view showing an embodiment of a float-and-sink type cage according to the present invention.

FIG. 4 is a diagram showing a towed state of a net cage in an embodiment of a floating and sink type cage according to the present invention.

FIG. 5 is a view showing another embodiment different from FIG. 1 in the embodiment of the floating and sink type cage according to the present invention.

FIG. 6 is a perspective view showing an example of a conventional float-sink type cage.

[Explanation of symbols]

10 Floating and sinking type cage 13 fish cage net 17 holding frame 18 Upper annular frame part 20 Fence frame part 20a rod-shaped body 34 Resistance member

Claims (4)

[Claims] 1. A fish cage net portion surrounding a fish is arranged so that it can be submerged in water, and air can be injected into and exhausted from the fish cage net portion, and the fish cage net is injected or exhausted through the air. A float capable of imparting a predetermined buoyancy to the part is arranged, and by adjusting the buoyancy of the float through the injection or exhaust of the air, the float-sink type cage that is capable of floating and sinking the fish cage net part A float-sink type cage which is characterized in that a holding frame for holding the shape of the cage net is provided, and the cage net is attachable to and detachable from the holding frame. 2. The float-sink type cage according to claim 1, further comprising a guide rope for holding the float-sink movement of the cage net part. 3. The float-and-sink type cage according to claim 1, wherein the cage net is movable to a desired tidal current position by towing. 4. The at least upstream portion of the holding frame in the towing direction is prevented from being deformed in a direction in which the volume inside the net cage is reduced by being pressed by the water flow at the time of the towing. The float-and-sink type cage according to claim 3, further comprising a resistance member for performing the operation.