JPH0659150B2 - Aquaculture cage - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a cage used for aquaculture of seafood, which has improved wave resistance and durability and can be used in the open sea.

[Prior art] Instead of the traditional fishing, fishery using fish cages has been actively cultivated as a fishery to make and raise fish. In some inner bays, fish cages become close to overcrowded. There are some places.

In the inner bay, it is not possible to expect seawater to be exchanged so much, and there are problems such as bait leaking out of the cage and marine pollution due to the remaining bait, so cages are being installed from the bay to the open ocean. There is.

In order to install a cage in the open ocean, it receives external forces such as towing of the cage to the open ocean and waves due to severe sea conditions, so it is more resistant to waves and durability than the cages installed in the inner bay. Required.

As such a cage that can be used in the open sea, for example, there is a cage proposed in Japanese Utility Model Publication No. 60-2769, and as shown in FIG. 15, the cage 1 is a rod-shaped reinforcing elastic member. The body 2 is connected to each other by a bending joint 3 to form a polygonal frame having 4 to 30 sides.

In addition, 4 is a net, 5 is a weight, and 6 is a mooring line.

According to this structure, the reinforcing elastic body 2 forming the cage 1 has a large deformation resistance to an external force such as a tidal current as in the case of both ends fixed beams, and can be used in the open sea.

[Problems to be Solved by the Invention] However, in this cage 1, the reinforcing elastic body 2 is supported like a beam with both ends fixed, but each beam portion itself is formed of the reinforcing elastic body 2 and a considerable amount of Since it has elasticity, it has a problem that it is easily deformed as shown by the chain double-dashed line in the figure against a large external force such as tidal current or towing.

Therefore, it is possible to improve the resistance against external force and prevent deformation by using a rod body with high rigidity.
If the rigidity of the rod-shaped body is increased, it is not possible to levitate along the wave when a large wave comes, and the wave riding property deteriorates, and a part of the rod-shaped body dives into the sea, causing problems such as seafood coming out of the cage. Will end up.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems in conventional cages, and to provide a cage for aquaculture that has resistance against external forces such as during towing and tidal currents and that has good surfability.

Another object of the present invention is to provide an aquaculture cage that can further enhance its resistance by providing a directivity to external forces such as during towing and tidal current.

Furthermore, it is an object of the present invention to provide a highly safe aquaculture cage that can be safely operated on the cage and can be improved in visibility from a ship traveling in the vicinity.

Another object of the present invention is to provide an aquaculture cage that can secure buoyancy even if the frame is damaged.

[Means for solving the problem] When the external force applied to the aquaculture cage is analyzed, the rigidity of the aquaculture cage required for the external force direction due to the water flow during towing and the tidal current direction after installation is in these directions. On the other hand, since the direction of the wave is the same as the direction of the tidal current, increasing rigidity in the direction perpendicular to the tidal current is effective in preventing deformation, and some elasticity in the tidal direction is provided. It has been found that the holding is effective for improving the wave riding property.

Therefore, in order to achieve the above object, the aquaculture cage of the present invention forms a frame body having buoyancy by connecting rod-shaped rigid frame members and elastic frame members arranged substantially in parallel to each other in a cross beam shape, It is characterized in that the frame body is moored so that the rigid frame member is substantially perpendicular to the direction of the external force such as wave force.

Further, it is characterized in that a rudder means is provided on the frame body, and a rigid frame member on one side of the frame body is directed in a direction substantially perpendicular to the external force to improve resistance against the external force.

Further, at least the upper surface of the frame body is provided with a non-slip means for preventing slippage during work, or a rod body is provided to enhance safety, and a display means for indicating the presence of the rod body is provided. This is characterized by improving the visibility from the outside.

Further, it is characterized in that the frame body is filled with closed-cell foam so that buoyancy can be secured even when the frame body is damaged.

[Operation] According to the aquaculture cage thus configured, the frame body is formed by combining the rigid frame member and the elastic frame member in a cross beam shape, and the rigid frame member resists external force. At the same time, the elastic frame member is made to secure the wave riding property.

Further, the rudder means is provided so that the rigid frame member portion of the frame body is directed in the direction perpendicular to the external force direction to further improve the resistance and the wave riding property.

Furthermore, a non-slip means and a rod are provided so that work can be performed safely.

Further, display means such as a reflection sheet or a light emitting body is attached to the rod body to improve visibility from the outside and prevent a collision of a ship sailing in the vicinity.

Further, the inside of the frame is filled with closed-cell foam so that even if the frame is damaged, buoyancy is not lost and the function as a cage is ensured.

[Embodiment] An embodiment of the present invention will be described below in detail with reference to the drawings.

One embodiment of the aquaculture cage 10 of the present invention has three rigid frame members 11 arranged in parallel and four elastic frame members arranged in parallel as shown in FIG. It is provided with a rectangular frame body 13 in which 12 and 12 are connected in a cross shape, and a net 14 is attached to the peripheral portion of the frame body 13.

The net 14 includes a side net 14a and a bottom net 14 located below the water surface.
b and an upper net 14c located on the frame 13, the side net 14a is attached to the frame 13 via a floating body 14d provided at the top edge, and the lower net of the side net 14a is attached. A bottom net 14b is attached to the bottom to form a cage space in which only the upper portion is opened. Further, the upper net 14c is supported by rods 28 and 29 attached to the frame 13 so as to surround the upper peripheral edge of this opening.

A large number of weights 15 are attached to the lower edge of the side net 14a so that the net 14 can be stabilized.

Then, upon installation or towing on the open sea, the rigid frame member 11 is fixed by mooring lines 16 so as to be perpendicular to the direction of external force such as tidal current, or a tow line (not shown) is attached.

Details of the rigid frame member 11 of the aquaculture cage 10 are, as shown in FIGS. 2 to 4, a steel pipe 17 having a rectangular cross section, and both ends thereof are closed and hermetically sealed. .
Then, a blind flange 18 is attached by welding or the like to a side surface of the rigid frame member 11 which is a connecting portion with the elastic frame member 12, and one side surface of the rigid frame member 11 arranged outside the frame body 13 is Rigid frame member 1 arranged in the middle of the frame body 13
1, the blind flanges 18 are attached to both sides, respectively.

If the blind flanges 18 are provided in advance on both side surfaces and both end portions of the rigid frame member 11, too, the rigid frame member 11
By changing the size of the frame 13 by connecting the both ends to each other or connecting the elastic frame member 12 to the side surface.
The size of can be expanded.

For details of the elastic frame member 12 of the aquaculture cage 10, see
As shown in FIG. 4, FIG. 5 and FIG. 5, steel blind flanges 20 are attached to both ends of a hollow cylindrical reinforcing rubber 19 and are hermetically sealed, and one end is for increasing buoyancy. Ball valve 21 for injecting air of
It is covered with a cover 22.

This reinforcing rubber 19 part is, for example, as shown in FIG.
The rubber cords 19b are provided inside and outside the four layers of reinforcing cord 19a such as vinylon, respectively.
A strip-shaped reinforcing wire 19c is provided at both ends to be fixed portions to the
Is included.

In the blind flange 20, the cylindrical body 20b is welded to the flange 20a, and the ring member 20c is welded to the outer end of the cylindrical body 20b to prevent the reinforcing rubber 19 from coming off.

A through hole is formed in the side surface of the cylindrical body 20b and the ball valve 21 is welded to the flange 20d. The flange 20d is arranged outside the ball valve 21 and is welded to the cylindrical body 20b.
The cover 22 is bolted to the cover.

The rigid frame member 11 and the elastic frame member 12 are combined to form the frame body 13. However, the frame bodies 13 are arranged in a fixed manner, for example, three rigid frame members 11 are arranged in parallel, and 4 The elastic frame member 12 is arranged parallel to the rigid frame member 12 in a direction perpendicular to the rigid frame member 12, and the blind flange 1 of the rigid frame member 11 is arranged.
The blind flange 20 of the elastic frame member 12 is applied to 8 and is connected with a bolt.

In addition, compressed air is introduced from the ball valve 21 into the elastic frame member 12 to increase buoyancy.

When installing the aquaculture cage 10 in the open sea, mooring lines 16 are attached to the rigid frame member 11 so that the rigid frame member 11 is moored so as to be perpendicular to the external force direction such as tidal current, and towed. Also in the case of towing, the tow line is attached and towed so that the rigid frame member 11 is at a right angle to the towing direction which is the external force direction.

In this way, the frame 13 of the aquaculture cage 10 is replaced by the rigid frame member 11
The elastic frame member 12 and the elastic frame member 12 are installed in a directional manner, so that the rigid frame member 11 can easily maintain the shape of the frame body 13, and can also apply external force such as tidal current or water current during towing. Since it can be received by the rigid frame member 11, the deformation can be completely prevented.

On the other hand, since the elastic frame member 12 is located in the tide direction, the elastic frame member 12 can be easily flexed in synchronization with the waves, the wave riding property is also good, and a part of the frame body 13 is submerged and the seafood Can be prevented from escaping.

Therefore, in this aquaculture cage 10, its installation direction is important, and it is necessary to always orient the rigid frame member 11 in a direction substantially perpendicular to the external force direction.

Therefore, the aquaculture cage 10 includes, for example, FIGS.
Rudder means 23 to 25 as shown in the drawing are provided.

In the rudder means 23 shown in FIG. 6, a horizontal rotary shaft 23a is provided at the end of the rigid frame member 11, and a rudder shaft 23c having a rudder 23b attached to the distal end of the rotary shaft 23a is rotatably supported. The rudder 23b can be positioned and fixed in water by inserting the fixing pin 23d.

Therefore, the respective end portions 6 of the three rigid frame members 11 are
By arranging the rudder means 23 at a certain position so that the rudder 23b is located underwater in the installed state, the rigid frame member 11 of the aquaculture cage 10 is automatically oriented in the direction perpendicular to the external force. You can

When it is necessary to move the aquaculture cage 10 in the lateral direction or the like for adjusting the installation position of the aquaculture cage 10, the rudder 23b is easily moved by operating the rudder shaft 23c so as to be taken out of the water. In addition, the rudder 23b can be pulled out of the water and towed during towing.

The rudder means 24 shown in FIG. 7 has a rudder shaft (not shown) as a detachable type, and a horizontal rotary shaft 24 provided at the end of the rigid frame member 11.
A rudder 24b is directly attached to a and rotatably supported, and a bracket 24 for inserting a rudder shaft is provided on the surface of the rudder 24b.
Two c are attached, and the fixing pin 24d can be inserted and fixed.

Therefore, when operating the rudder 24b, a rudder axle (not shown) may be inserted into the bracket 24c,
Since the aquaculture cage 10 can be always directed in a fixed direction and there is no portion protruding above the rigid frame member 11, it does not interfere with other work.

The rudder means 25 shown in FIG.
The shape of the portion corresponding to is changed, and the members having the same function are denoted by symbols 25a to 25d and the description thereof is omitted.

Similarly, the rudder means 25 can always orient the aquaculture cage 10 in a fixed direction.

The installation position of the rudder means is not limited to the end of the rigid frame member 11, but may be installed in the middle part or the elastic frame member.
The number of installations is not limited to one provided at each end.

Further, in these rudder means, the rudder is positioned in the water or moved out of the water by rotating about the horizontal axis of rotation, but it is possible to rotate around the vertical axis by providing a bracket or the like. It is also possible to turn the rudder in a predetermined direction during towing to make towing even easier.

Further, the raising and lowering of the rudder and the turning operation in the towing direction may be performed from a towing ship or the like by providing a remote control device.

Next, a non-slip means, a rod body, and the like for enabling safe operation on the aquaculture cage 10 will be described.

Examples of the non-slip means provided in the aquaculture cage 10 include those shown in FIGS. 9 and 10.

The anti-slip means 26 shown in FIG. 9 is a rubber sheet material 2 in which a friction agent is mixed on the upper surface of a rigid frame member 11 constituting the frame body 13.
6a is attached.

Frame body 1 when feeding seafood by doing this
You can work without slipping when you need to work on 3.

Further, as shown in FIG. 10, it is also possible to use as the anti-slip means 27 by using the rigid frame member 11 in which the steel pipe 17 itself is provided with the unevenness 27a.

Further, although not shown in the drawings, a non-slip material such as red iron oxide may be directly laid on the surface of the frame body 13, or a non-slip sheet material separately manufactured from another material such as rubber or synthetic resin may be attached. The attachment target is not limited to the upper surface of the rigid frame member 11, but may be at least the upper surface of the frame body 13 including the elastic frame member 12.

Next, regarding the attachment of the rod body necessary for the safety work, the case of attachment to the elastic frame member 12 and the case of attachment to the rigid frame member 11 will be described.

As shown in FIG. 11, the rod 28 attached to the elastic frame member 12 has an attaching band 28a wound around the elastic frame member 12 and tightened with a bolt, and the rod 28 is attached to a flange portion 28b formed on the attaching band 28a. It is attached by tightening the lower end with bolts.

On the other hand, the rod 29 attached to the rigid frame member 11 is the first
As shown in FIG. 2, a bracket 29a is previously welded to the upper surface of the rigid frame member 11, and the lower end portion of the rod body 29 is attached to the bracket 29a with bolts.

The shapes of the rods 28 and 29 are appropriately bent so as to be convenient for work.

In the aquaculture cage 10 of this embodiment, rod bodies 29 are provided on both sides of the rigid frame member 11 in the middle portion (see FIGS. 2 and 3).

Further, these rods 28, 29 are provided with a display means 3 for clearly indicating the presence in a ship navigating near the aquaculture cage 10.
0 is provided, and for example, as shown in FIG.
A light-emitting body using the L element 30a is used to form a thin film EL
The element 30a is attached to a belt-shaped support strip 30b made of a thin metal plate, and the support strip 30b is attached so as to cover the rods 28 and 29. Then, bolts are inserted into the flanges 30c provided at both ends of the support strip 30b. And can be fixed.

Therefore, due to the current from the power supply device (not shown), E
By making the L element 30a emit light, let alone during the daytime,
Even at night, fog, or rain, the presence can be clearly indicated, and collisions can be prevented.

Further, the display means 31 shown in FIG. 14 uses a retroreflective tape 31a, and is wound around and fixed to the rod bodies 28 and 29 in a spiral shape.

By winding such a retroreflective tape 31a, it is possible to reflect light, and it is possible to clearly indicate the presence in a ship sailing at night as well as in the daytime.

In addition to these, the display means may be configured by attaching a reflector or by attaching another light emitting body.

Furthermore, if the rigid frame member 11 and the elastic frame member 12 that form the frame body 13 are damaged, the sealability is lost and seawater and the like enter the interior, and lose buoyancy. As shown in, the closed frame foam 32 may be filled inside the rigid frame member 11 and the elastic frame member 12.

In this case, even if the rigid frame member 11 and the elastic frame member 12 are damaged and lose the hermeticity, the closed bubbles of the foam 32 prevent the intrusion of seawater or the like and secure the buoyancy. .

Further, a fender 33 is attached to the outer surface of the rigid frame member 11, which is the outer side of the frame 13, so as not to be damaged even by a port such as a work boat (see FIGS. 2 and 12). .

As described above, according to the aquaculture cage 10 of the present embodiment, since the rigid portion of the frame body 13 by the rigid frame member 11 occupies about half, it is easy to maintain the shape, and the predetermined shape of the aquaculture cage. Can be kept at

Further, when an external force such as a tidal current or a water current at the time of towing is applied, the rigid frame member 11 receives the external force, so that the deformation of the frame body 13 can be prevented.

Further, when an external force is applied to the frame body 13, the elastic frame member 12
Since a force acts in the axial direction, and since it is mainly a compressive force, bending stress does not act, damage can be prevented, and durability can be greatly improved.

Further, when the wave acts on the frame body 13, the elastic frame member 12 is positioned in the up and down direction due to the wave, so that the frame body 13 can be bent in synchronization with the wave and seafood and the like escape from the cage. Can be prevented.

Further, by attaching the blind flanges 18 to the rigid frame member 11 on three sides, the area of the aquaculture cage 10 can be easily enlarged by preparing the rigid frame member 11 and the elastic frame member 12. .

Further, by providing the rudder means 23 to 25, the frame body 13
Can be held in a fixed direction with respect to an external force, and at the same time the rigid frame member 11 receives the external force, the elastic frame member 12 can be automatically bent with respect to waves.

Further, by providing the frame body 13 with the non-slip means 26, 27, it is possible to prevent accidents such as falling into the sea during the work, and the work can be performed safely by the rod bodies 28, 29.

In addition, the presence of the aquaculture cage 10 can be notified by the display means 30 and 31, and the collision of ships can be prevented, which is particularly effective at night.

Furthermore, by filling the foam body 33 with closed cells in the frame body 13, buoyancy is not lost even if the sealing performance is damaged due to damage, and the fender material 33 also prevents damage to the frame body 13 itself when it is ported. It can be prevented.

[Effects of the Invention] According to the aquaculture cage of the present invention as specifically described above with reference to Examples, the frame body is formed by combining the rigid frame member and the elastic frame member in a cross beam shape. It is possible to secure resistance to external force by the rigid frame member and at the same time secure wave riding property by the elastic frame member.

Further, by providing the rudder means, the rigid frame member portion of the frame body can be oriented in the direction perpendicular to the external force direction, and the resistance and the wave riding property can be further improved.

Further, by providing the non-slip means and the rod body, the work on the cage can be performed safely.

Further, by attaching a display means such as a reflection sheet or a light emitting body to the rod body, it is possible to improve the visibility from the outside and prevent a collision of a ship sailing in the vicinity.

Further, by filling the inside of the frame body with the foam of closed cells, the buoyancy is not lost even if the frame body is damaged, and the function as a cage can be secured.

[Brief description of drawings]

FIG. 1 is an external perspective view showing a part of an installed state according to an embodiment of the aquaculture cage of the present invention in an enlarged manner, and FIGS. 2 to 4 are plan views according to an embodiment of the aquaculture cage of the present invention. Drawing, front view, side view, and FIG. 5 are enlarged sectional views of the elastic frame member, and FIGS. 6 to 8 are explanatory views of the rudder means, FIG. 9 and FIG. 10, respectively.
The figures are explanatory views of the anti-skid means, respectively, FIG. 11 and FIG.
FIGS. 13A and 13B are explanatory views of the rod body, FIGS. 13 and 14 are explanatory views of the display means, and FIG. 15 is an explanatory view of the conventional cage. 10: Aquaculture cage, 11: Rigid frame member, 12: Elastic frame member, 13: Frame body, 14: Net, 15: Weight, 16: Mooring line,
23 to 25: rudder means, 26, 27: non-slip means, 28,
29: bar, 30, 31: display means, 32: foam.

Claims (5)

[Claims] 1. A rod-shaped rigid frame member and an elastic frame member, which are arranged substantially parallel to each other, are connected in a cross beam shape to form a frame body having a buoyancy force, and the rigid frame member is substantially aligned with an external force direction such as a wave force. An aquaculture cage, wherein the frame is moored so as to form a right angle. 2. The aquaculture cage according to claim 1, further comprising rudder means for directing the rigid frame member on one side of the frame body in a direction substantially perpendicular to an external force. 3. The aquaculture cage according to claim 1, wherein at least the upper surface of the frame is provided with an anti-slip means for preventing slippage during work. 4. A frame body is provided with a rod body for ensuring safety during work, and a display means for indicating the existence is provided on the rod body, according to any one of claims 1 to 3. Aquaculture cage. 5. The aquaculture cage according to any one of claims 1 to 4, wherein the frame body is filled with a foam having closed cells.