JPH05207834A - Crawl frame - Google Patents

Abstract

PURPOSE:To obtain a crawl frame having a good shape-retaining property and a good wave-following property by connecting the frames of multiple circular structures having different diameters to each other in a specific state, the structures being produced by connecting bar-like reinforcing elastic members to each other. CONSTITUTION:Circular frames 10, 20 ... produced by connecting bar-like reinforcing elastic members 11-18; 21-28 to each other and having different outer diameters are connected to each other through connecting members capable of being elastically deformed at least in the diameter direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cage frame for enclosing a certain section of the sea surface with a frame and attaching a net having a bottom to the bottom of the frame to cultivate fish and shellfish within its volume.

[0002]

2. Description of the Related Art Conventionally, a certain area in water is surrounded by a net,
Among them, the ikesu for culturing fish is disclosed in JP-A-52-1639.
As disclosed in Japanese Unexamined Patent Application Publication No. 8 and Japanese Patent Application Laid-Open No. 52-30695, a cage frame made of iron material attached with bamboo, wood, or floats suspended near the water surface, and a bottomed frame hanging from the cage frame. It was composed of a net.

The above-mentioned cages are mainly small ones up to 15m square and were used in the bay where the waves are calm, but with the increase of the number of cages, the congestion of the cages in the bay has become remarkable. .. Further, in the bay, seawater is polluted by cultured fish, and since the influence of tidal current is small, it is difficult for the seawater in the cage to be replaced, and the oxygen concentration of seawater tends to be insufficient. Therefore, there is a problem that the efficiency of fish farming is low.

In order to solve the problems of overcrowding and poor aquaculture efficiency, it has been attempted to use a large squid outside a wide bay. However, because waves and tidal currents are strong outside the bay, forces such as pulling, compression, twisting, and bending act on the cage frame, and when the cage frame is made of a rigid body such as iron as described above, There was a problem that it could not withstand long-term use. Further, although bamboo and wood have good followability by waves, they have problems that their dimensions are not constant or they are corroded by seawater, and they are difficult to increase in size and cannot withstand long-term use.

Therefore, in order to improve the durability, as in Japanese Utility Model Publication No. 60-2769, frame bodies composed of a plurality of elastic cylindrical hoses are connected by joints to form an Ikes frame, or JP-A-62-62. As disclosed in Japanese Patent No. 17162, by connecting a plurality of rigid bodies with a joint made of a flexible member, a so-called wave-following property that does not oppose waves as much as possible is provided. Further, as a case frame having a rigid body structure made of an iron material, a large-scale structure using a large-diameter steel pipe, a thick steel plate, or the like is being provided. But,
Each of the cage frames has a relatively large frame member and is expensive in price.

Particularly, in the case frame composed of an elastic cylindrical hose disclosed in Japanese Utility Model Publication No. 60-2769, since the deformation strength of the elastic cylindrical hose with respect to the force in the vertical direction is equal to the deformation strength in the horizontal plane, it follows the waves. If the shape retention is to be ensured, the shape retention in the horizontal plane is deteriorated. Conversely, if the shape retention is to be improved in the horizontal plane, the wave followability is deteriorated. That is, it was difficult to achieve both the wave followability and the shape retention.

Further, the biggest problem in increasing the size of the case frame is the shape retaining property as a frame, and the larger the size of the case frame is, the more the shape retaining force, that is, the bending rigidity of the elastic member is required. Ideally, the wave followability is soft and follows any wave regardless of the size of the squid frame. In other words, an Ikes frame is required that has a high shape retention force in the horizontal plane (high bending rigidity in the horizontal plane) and good followability to vertical movement of waves (low bending rigidity in the vertical direction).

As the cage frame having different rigidity in the two directions, a hollow cylindrical rubber tube disclosed in Japanese Patent Publication No. 61-501366 is mutually connected by a universal joint, and two hexagonal shapes are arranged in a horizontal plane. And the elastic frame disclosed in Japanese Patent Laid-Open No. 3-251130, and the elastic frame disclosed in Japanese Patent Laid-Open No. 3-259026 in which the elastic frame made of a long flat plate has a polygonal shape. At least two of the substantially circular levitation frames formed
Between the points, there is a cage frame in which elastically deformable cords are stretched.

[0009]

It is generally known that a circular frame shape facilitates the swimming of fish and improves the efficiency of aquaculture of the fish. However, the above Japanese Patent Publication No. 61-5
In the case frame of Japanese Patent No. 01366 and JP-A-3-259026, the shape of the case frame is polygonal rather than circular (annular), so that it is difficult for fish to swim and the efficiency of fish cultivation is poor. Also, in places with severe sea conditions outside the bay, the external force is large and the deformation of the frame member is large, so if the polygonal structure has corners, stress concentration will occur at the corners, and durability problems will occur. Occurs. From this also, a circular shape is preferable as the cage frame.

On the other hand, the cage frame disclosed in Japanese Patent Laid-Open No. 3-251130 is a cage frame in which the above problems are taken into consideration.
A cord-like body for maintaining the frame shape is stretched in the cage frame where the fish are cultivated. However, when the fish comes into contact with the cords during feeding, the cords expand and contract in response to the shaking and deformation of the cage frame caused by waves and come into contact with the water surface inside the frame or are immersed in the water. There is. When a fish comes into contact with the cord, there is a risk that the surface of the fish will be scratched, its commercial value will be reduced, or the wound will be infected with a disease and die.

In order to meet the above requirements, the applicant of the present invention uses a rod-shaped reinforcing elastic member as the structure of the cage frame and connects the reinforcing elastic members to form an annular (substantially circular) shape. It was used to create an Ikes frame with multiple structures. An example of this box is shown in FIGS. The cage frame in Figure 7 is
The outer ring frame 1 and the inner ring frame 2 are used to form a dual structure in a plane, and the cage frame in FIG. 8 has a two-dimensional structure using the outer ring frame 1 and the inner ring frame 2. The outer ring frame 1 and the inner ring frame 2 are joined together by a joint 3 to have a heavy structure.

FIG. 9 shows a case frame having a double structure in FIG.
When the bending rigidity in the horizontal plane and in the vertical direction is compared with the cage frame having a single structure using the annular frame body 4 to which the rod-shaped reinforcing elastic member shown in FIG. In-plane bending rigidity is only twice as high as that of the Ikes frame with a single-layer structure. In the case frame in which the outer annular frame body 1 and the inner annular frame body 2 of FIG. 8 are joined by the joint 3, the bending rigidity in the vertical plane is twice that of the single case structure, but in the horizontal plane. The outer ring frame 1 and the inner ring frame 2 are constrained in a plane by the joint 3, and they are deformed almost integrally without being independently deformed. It is higher than twice the IKES frame. That is, the structure satisfies the above requirements. The reinforcing elastic members forming the annular frames 1 and 2 are required to maintain the shape of the cage frame, and thus are required to have a high bending elastic modulus. Therefore, the elastic modulus in the longitudinal direction (axial direction) is necessarily high, and the contraction in the longitudinal direction is extremely small.

However, in the case frame of FIGS. 7 and 8, when the case frame is deformed in a plane, the following problems occur. Since the length (circumferential length) of the annular frames 1 and 2 does not change,
When the cage frame having the multiple structure is deformed, the distance D between the annular frames 1 and 2 includes a narrowed portion D1 and a separated portion D2, as shown in FIG. In particular, in the case frame of FIG. 8, since the joint 3 having a rigid structure is used for joining the annular frame bodies 1 and 2, it is not possible to follow the change in the distance between the annular frame bodies 1 and 2, and As described above, the cage frame is deformed distortedly, and the shape retention as the cage frame cannot be sufficiently maintained, and the rod-shaped reinforcing elastic members constituting the annular frame bodies 1 and 2 are also deformed unreasonably, resulting in durability. Cause problems.

In view of the above, it is an object of the present invention to provide a cage frame which is excellent in shape retention and wave followability and is also excellent in durability.

[0015]

A means for solving the problems according to the present invention is to provide a multiple circular structure by using a plurality of annular frame bodies having different outer diameters, which are connected to each other by a rod-shaped reinforcing elastic member, and have an inner ring and an outer ring. The frame members are connected to each other by a connecting member that is elastically deformable at least in the radial direction.

[0016]

In the above means for solving the problems, a plurality of annular frame bodies having different outer diameters, which are connected to the rod-shaped reinforcing elastic members, are used to form a multiple circular structure, and the inner and outer annular frame bodies are at least radially arranged. Since the connecting members are elastically deformable to each other, the connecting members are elastically deformed according to the change in the distance between the annular frame bodies, and the shape of each annular frame body does not become irritated.
Shape retention is improved.

Further, since the connecting member is deformed according to the change in the distance between the annular frames even with respect to the change in the vertical direction due to waves or the like or the change in the twisting direction, the wave followability and The durability is also improved.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 is a plan view of an exhaust frame according to an embodiment of the present invention, FIG. 2 is a developed view of an X portion shown in FIG. 1, and FIG. 3 is a sectional view of FIG. 2A is a side development view seen from the outside, FIG. 2B is a plan development view, FIG. 3A is a YY cross-sectional view, and FIG. 3B is Z-. The Z sectional view is shown.

The IKEZ frame of this embodiment is for surrounding a certain section of the sea surface and attaching a net with a bottom to cultivate seafood within its volume. As shown in FIG. 1, an outer ring frame having a diameter R1. 1
0 and an inner annular frame 20 having a diameter R2 smaller than the diameter R1 are used to form a double circular structure. Outer annular frame 10
Is configured by connecting eight rod-shaped outer reinforcing elastic members 11 to 18, and the inner annular frame body 20 is configured by connecting eight rod-shaped inner reinforcing elastic members 21 to 28. As the reinforcing elastic members 11 to 18 and 21 to 28, a rubber elastic body in which a rod made of fiber reinforced plastic (FRP) is inserted to reinforce the rigidity in the bending direction is used.

The outer annular frame 10 and the inner annular frame 20
And are connected on the same plane by the connecting member 30. The connecting member 30 is arranged at 16 locations that are evenly divided, and as shown in FIG. 3, the tire 31 that is a flexible structure and the reinforcing elastic members 11-18 and 21-2.
8 and rubber-like elastic joints 32 for connecting each of them. The joint 32 is fixed to the tire 31 as shown in FIG. 2, and a foam polystyrene float 40 is attached to the center of the tire 31 via a wire 50 such as wire.

As described above, the reason why the float 40 is attached to the central portion of the tire 31 is that the annular frame bodies 10 and 20 are attached.
Is deformed by a tidal current, waves, etc., and the distance between the annular frame bodies 10, 20 changes, so that the float 4
When 0 is attached, the deformation of the annular frames 10 and 20 is hindered, and the tire 31 itself is also deformed with the change in the distance between the annular frames 10 and 20, so that the tire 31 does not hinder the deformation. A float 40 is attached to the center of 31.

Although various methods of attaching the aquaculture net are conceivable, in the present embodiment, a net (not shown) is attached to the inner annular frame 20. In the above configuration, the annular frame bodies 10 and 20 formed by connecting the rod-shaped reinforcing elastic members 11 to 18 and 21 to 28 are used to form a double circular structure.
Since the tire 31 which is a flexible structure is used as the connecting member 30 of the 20 members, the rigidity in the horizontal direction is increased, and the circular shape as the cage frame is unlikely to change due to tidal current, waves, etc., and the shape retention is good. Become. In addition, since the rigidity in the vertical direction is low, it is possible to obtain a cage frame that has good followability to waves and high durability.

Further, when the external force due to tidal current, waves, etc. is large and the cage frame is deformed into a substantially elliptical shape as shown in FIG. 9, the tire is changed according to the change in the distance between the annular frames 10 and 20. When 31 is deformed, the reinforcing elastic members 11 to 18 and 21 to 28 constituting the annular frame bodies 10 and 20 always maintain the parallel positional relationship, and the external force is evenly distributed and applied to reinforce the reinforcing members. The elastic members 11-18 and 21-28 are not unduly deformed.

The present invention is not limited to the above embodiments, and it goes without saying that many modifications and changes can be made to the above embodiments within the scope of the present invention. For example, as shown in FIG. 4, a pair of upper and lower outer annular frame bodies 10 and a pair of upper and lower inner annular frame bodies 20 may be joined by a tire 31 to form a quadruple circular structure. Further, as shown in FIG. 5, the outer annular frame body 10 and the inner annular frame body 20 may be joined with the tire 31 in different steps to form a double circular structure.

The structure of the connecting member 30 is shown in FIG.
As described above, a pair of insertion holes and the like are provided in an elastic body that is elastically deformable in the horizontal direction and the vertical direction, and the reinforcing elastic members that form the annular frame bodies 10 and 20 are fitted into the annular frame bodies 10 and 2, respectively.
A configuration in which 0s are connected may be used.

[0026]

As is apparent from the above description, the cage frame of the present invention has a multi-circular structure using a plurality of annular frame bodies having different outer diameters, which are connected to each other by a rod-shaped reinforcing elastic member, and have at least a diameter. Since the inner and outer annular frames are connected by a connecting member that is elastically deformable in the direction, the rigidity in the horizontal plane is high and the rigidity in the vertical direction is low, that is, shape retention and wave followability are good, and It is possible to provide an Ikes frame with excellent durability.

[Brief description of drawings]

FIG. 1 is a plan view of a cage frame according to an embodiment of the present invention.

FIG. 2 is a development view of an X part shown in FIG. 1, which is shown in FIG.
Shows a side development view seen from the outside, and FIG.

FIG. 3 is a cross-sectional view of FIG. 2A, in which FIG.
-Y sectional drawing and the same figure (b) have shown ZZ sectional drawing.

FIG. 4 is a development view of a cage frame according to another embodiment,
The figure (a) shows the side surface development view seen from the outside of the cage frame, the figure (b) shows the plane development view, and the figure (c) shows the bottom development view.

FIG. 5 is a development view of an exhaust frame according to another embodiment, FIG. 5A being a side development view seen from the outside of the exhaust frame, and FIG. 5B being a side development view seen from the inside. , The figure (c)
Shows a plan development view, and FIG. 6 (d) shows a bottom development view.

FIG. 6 is a diagram showing a modified example of a connecting member.

7A and 7B show an exhaust frame having a two-dimensional planar structure using an annular frame connected to a rod-shaped reinforcing elastic member. FIG. 7A is a plan view and FIG. FIG. 7A is a development view of the portion A, and FIG. 7C is a sectional view of FIG.

FIG. 8 shows an Ikes frame in which a circular double-layered structure is used in a plane and the annular frames are joined by a joint. FIG. 8A is a plan view and FIG. FIG. 7A is a development view of a B portion, and FIG. 7C is a sectional view of FIG.

9A and 9B show an Ikes frame having a single structure using an annular frame connected to a rod-shaped reinforcing elastic member. FIG. 9A is a plan view of the Ikes frame, and FIG. 9B is the same diagram. FIG. 6A is a development view of the C portion, and FIG. 6C is a sectional view of FIG.

FIG. 10 is a diagram showing a state where the cage frame is deformed by a tidal current, a wave, etc. in the cage frame having a double structure.

FIG. 11 is a view showing a state where the cage frame is deformed by a tidal current, a wave or the like in the cage frame having a double structure in which the annular frame bodies are joined by a joint.

[Explanation of symbols]

 10, 20 Annular frame body 11-18, 21-28 Reinforcement elastic member 30 Connecting member

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Osamu Murata 1117-2 Katata, Shirahama-cho, Nishimuro-gun, Wakayama Prefecture

Claims (1)

[Claims] 1. A multi-circular structure using a plurality of annular frame members having different outer diameters, which are formed by connecting rod-shaped reinforcing elastic members, and the inner and outer annular frame members can be elastically deformed at least in the radial direction. Ikes frame characterized by being connected by various connecting members.