JP3011374U - Floating reef - Google Patents

Abstract

(57) [Abstract] [Purpose] By improving the stability of floating reefs and mitigating wave sway, and further improving the structure of the mooring line connection,
Improve the service life of floating reefs. [Structure] A surface floating body 3 floating above the sea surface, and a mooring line 10 hung at the bottom from the lower end of the surface floating body 3 into the sea.
A floating fish reef K is composed of a column 2 connected to each other and an artificial seabed structure 1 which is horizontally provided below the column 2 and has a planar shape and a large area. A stable rudder 8 including vertical tails 8a to 8c and a horizontal tail 8d is provided at one end of the plane of the artificial seabed structure 1, and an eye plate 12 and a mooring line 10 provided at the bottom of the column 2 are provided with circular pins having a circular cross section. They are connected via a round pin shackle 17 that they have. Further, a spare line may be provided branching from the upper part of the mooring line, and the spare line may be connected to the eye plate provided at the lower part of the column in a loosened state.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The invention according to this application relates to a floating fish reef having sufficient directional stability and an effect of reducing shaking against waves and the like, and further improving the life of the mooring line by improving the connecting portion of the mooring line.

[0002]

[Prior art]

 Migratory fish such as skipjack, tuna, yellowtail, and dolphins have a habit of gathering in driftings such as driftwood that drifts in the ocean, and this behavior is used to actively collect, retain, and guide fish to maintain and secure catch. The floating fish reef, which is an artificial floating structure, is often used to achieve this.

[0003] Generally, floating reefs are installed (moored) in a fishing ground for migratory fish such as skipjack and tuna by a single-point mooring method. This fishing ground is in the Kuroshio Current area, and has large water depth, fast flow, and large waves caused by typhoons. It is in a severe natural environment.

In particular, a floating reef installed on the surface of the water is different from an underwater installation type floating reef, and is easily affected by waves on the surface of the water. When the floating reef frequently sways in the waves, the floating reef is moored. The wear and deterioration of the line will be accelerated.

In the conventional floating fish reef, there are many runaway accidents due to breakage and wear of the shackle part especially at the upper end of the mooring line (connection portion with the floating fish reef), and it is not established as a stable floating fish reef, so The number of years is short.

Therefore, in order to prolong the service life, the floating fish reef (conventional example 1) described in Japanese Patent Application Laid-Open No. 2-104228 has the head of the floating body formed as an upper columnar body and the upper portion as a leg portion of the floating body. A lower columnar body having a diameter smaller than that of the columnar body is coaxially hung on the lower surface of the upper columnar body, and a plurality of horizontal stabilizers having a diameter larger than that of the upper columnar body are coaxially provided on the lower surface of the lower columnar body so as to be horizontal. A vertical stabilizer is provided on the stabilizer along the radial direction of the lower column, and the buoyancy of the entire floating body is set so that the lower surface of the upper column is below the water surface to form a two-point waveless floating body. .

Further, in order to improve the directional stability, a floating fish reef described in Japanese Patent Laid-Open No. 3-191735 (conventional example 2) has a main column on the bottom surface of a floating body that is oval or elliptical in plan view. A sub-column with a smaller outer diameter is provided, and an eye plate for connecting the mooring line is attached to the bottom of the main column. Since the outer diameter of the sub-column is smaller than the outer diameter of the main column, it is assumed that the posture will be naturally oriented in the direction of the ocean current without the need for conventional fins.

[0008]

[Problems to be solved by the device]

 As previously mentioned, all mooring systems for floating reefs are single-point mooring systems, and runaway accidents due to breakage of mooring lines have been frequent. In order to prevent such a runaway accident, basically, it is necessary to reduce the wave fluctuation of the floating reef as in Conventional Example 1 and to stabilize the direction of the floating reef in the flow as in Conventional Example 2. is important.

However, most of the breakage accidents of the mooring line occur at the place where the mooring line is connected to the floating reef. Generally, mooring lines are connected to the mooring ring (eye plate) of the floating body with a shackle, and such a runaway accident causes wear on the lower end of the eye plate, wear on the shackle pin, and between the shackle and chain link at this connection. It is caused by wear and tear. Possible causes of wear include wear due to wave sway, fatigue due to mooring tension, and local battery corrosion.

In a steel floating reef, battery corrosion can be easily prevented by attaching a sacrificial anode such as an aluminum anode near the connection part. However, wear due to wave vibration and fatigue due to mooring tension Can be said to be sufficient measures only by reducing the wave sway of the floating reef as in Conventional Example 1 and by stabilizing the direction of the floating reef in the flow as in Conventional Example 2. Absent. In addition, it is considered necessary to separately take measures for the connection part of the mooring line and measures for breakage of the mooring line, which are not taken into consideration in Conventional Example 1 and Conventional Example 2.

In view of such conventional problems, the invention according to the present application improves the stability of the floating reef and the reduction of wave sway, and further improves the structure of the connecting portion of the mooring line to improve the service life of the floating reef. The purpose is to improve.

[0012]

[Means for Solving the Problems]

 In order to achieve the above object, the floating reef according to claim 1 comprises a surface floating body floating above the sea surface, a column hanging from the lower end of the surface floating body into the sea, and a mooring line connected to the lower part thereof, and a horizontal part at the bottom of the column. In the floating reef consisting of an artificial seabed structure with a large planar area, which is provided in the above, a stable rudder composed of a vertical tail and a horizontal tail is provided at one end of the plane of the artificial seabed structure.

The floating reef according to claim 2 is a surface floating body floating above the sea surface, a column that hangs from the lower end of the surface floating body into the sea, and a mooring line is connected to the bottom, and a flat surface horizontally provided at the bottom of the column. A floating reef consisting of an artificial seabed structure with a large area and a large area is characterized in that the eye plate provided at the bottom of the column and the mooring line are connected via a round pin shackle having a round pin with a circular cross section. To do.

The floating reef of claim 3 is a surface floating body floating above the sea surface, a column that hangs down from the lower end of the surface floating body into the sea, and a mooring line is connected to the bottom, and a plane horizontally provided at the bottom of the column. In a floating fish reef consisting of an artificial seabed structure with a large area, it is rotatable in the vertical plane of the floating reef between the eye plate provided at the bottom of the column and the round pin shackle at the upper end of the mooring line. A connecting metal fitting connected to the eye plate with a round pin is provided, and a universal joint that connects the round pin shackle rotatably in a vertical plane perpendicular to the rotation surface of the connecting metal fitting is provided below the connecting metal fitting. Is characterized by.

The floating reef according to claim 4 is a surface layer floating body floating above the sea surface, a column hanging from the lower end of the surface layer floating body into the sea, and a mooring line connected to the lower part, and a plane horizontally provided at the lower part of the column. A floating fish reef consisting of an artificial seafloor structure with a large area, with a preliminary line diverging from the upper part of the mooring line, with the preliminary line slack on the eye plate provided at the lower part of the column It is characterized by connecting with.

[0016]

[Action]

 According to claim 1, the artificial seabed structure having a large area functions as a stabilizing plate against wave sway while exhibiting the effect of collecting fish, and by the stable rudder (the vertical tail makes the direction of the floating reef constant, (The tail fin restores the slope of the floating reef due to the hydrodynamic force.) It prevents the tilt angle of the floating reef from increasing in the sea tide and prevents the increasing hydrodynamic force applied to the artificial seabed structure. The functions of both the artificial seabed structure and the stable rudder combine to stabilize the load direction at the connection part of the mooring line, that is, reduce the degree of wear damage to the connection part.

According to a second aspect of the present invention, the shackle at the connecting portion of the mooring line is provided with a round pin shackle (a round pin having a circular cross section has a hole in the eye plate so as to prevent looseness). Shackle that engages with the eye plate) to reduce the contact surface pressure between the round pin and the eye plate, and the round pin smoothly rotates in the hole of the eye plate, Prevents wear and wear, and wear of the lower end of the eye plate hole.

According to the third aspect of the present invention, the universal joint prevents the axial center of the round pin of the round pin shackle from being always orthogonal to the load direction and prevents a moment from acting on the round pin against the fluctuation of the floating reef in the front-back and left-right directions. . That is, it is possible to prevent the local contact surface pressure between the round pin and the eye plate from rising and further reduce the wear of the shackle pin and the lower end of the eye plate hole.

If a spare line having the same strength as the main line is provided above the mooring line as claimed in claim 4, no mooring tension acts on the spare line until the main line is broken, and accordingly As a result, the preliminary line continues to retain its almost initial strength, and the mooring capacity equivalent to the initial level can be secured even after the main line breaks.

[0020]

【Example】

 An embodiment of the invention according to this application will be described below with reference to the drawings. Fig. 1 is a side view of a floating fish reef installed on the sea surface by a single-point mooring method, Fig. 2 is an enlarged side view of the floating fish reef, Fig. 3 is an enlarged plan view of an artificial seabed structure, and Fig. 4 is a column and a plan of the floating fish reef. Fig. 5 is an enlarged detail view of the connection part of the mooring line including the storage line, Fig. 5 is an enlarged detail view of the connection part of the lower column and the main line, and Fig. 6 is an enlarged detail view of the connection part of the lower column and the backup line.

As shown in FIG. 1, the floating fish reef K is moored by a single-point mooring method near the sea surface by a mooring line 10 having an anchor 9 at its end. The mooring line 10 has an upper portion 10c, a sea bottom contact portion, and a line 10a on the sea floor as a chain, and a resin-coated wire rope 10b is used between them. The upper chain 10c is used to avoid damage to the mooring line 10 due to interference with fish tools, and the resin-coated wire rope 10b is adopted in consideration of weight reduction and durability of the mooring line 10. There is something.

As shown in FIGS. 2 and 3, the floating fish reef K is an artificial seabed structure 1 which is a regular hexagonal planar shape and has a large area and which is located below the sea surface, and an artificial seabed structure 1 standing at the center thereof. It mainly consists of a circular column 2 to be installed and a surface floating body 3 located on the sea surface.

As shown in FIG. 3, the artificial seabed structure 1 includes a frame 4 formed of a steel pipe in a regular hexagon centered on a column 2, and the corners of the regular hexagonal frame 4 are radially arranged in three directions from the column 2. The inside of the regular hexagon is divided into three rhombuses by the overhanging frame 5 extending to the portion, and the fishnet 6 is stretched within this division. This artificial seabed structure 1 serves as a base for biofouling and plays a role of enhancing the gathering effect of fish, and at the same time, the wide shelf structure increases the additional weight of the floating body and causes wave sway. It also functions as a stabilizer against the heat and has the effect of reducing shaking.

At the three corners of the hexagonal frame 4, leg parts 7 are projected downward as shown in FIG. 2. For example, when the floating reef K is placed on the ground, the following stable rudder 8 is set on the ground. The floating reef can now be stably placed without hitting the cliff.

Further, a stable rudder 8 is provided at one corner of one end of the plane of the artificial seabed structure 1 so as to have a constant directionality with respect to the sea tide and to connect the mooring line 10 and the floating reef. It is designed to stabilize the load direction at the connecting part. The stabilizer rudder includes vertical tails 8a to 8c for stabilizing the shape of the floating reef and a horizontal tail 8d for reducing the tilt angle of the floating reef. The horizontal stabilizer 8d is attached so as to be inclined slightly downward. The vertical stabilizer 8b is erected on a centerline 11 connecting the center of the column 2 and the apex of the corner 4a, and the vertical stabilizers 8a, 8c are erected symmetrically on the centerline 11 on a horizontal stabilizer 8d.

The column 2 is configured as a connecting member between the artificial seabed structure 1 and the surface layer floating body 3 for keeping the artificial seabed structure 1 at an appropriate water depth below the sea surface as shown in FIG. The column 2 is formed to have a smaller diameter than the surface floating body 3 when seen in a plan view, and an eye plate 12 for connecting to the mooring line 12 is provided on the lower surface of the column 2. A round pin shackle 17, which will be described later, is attached to the eye plate 12. The upper surface floating body 3 of the column 2 is an equipment room, in which a battery and a GPS receiver of a floating reef monitoring device are stored. The space below it is normally a closed space and is accessible for structural inspection.

The side surface of the surface floating body 3 is filled with a foam material so that it will not sink even if the side skin is damaged by the collision of driftwood or a ship. Further, the surface floating body 3 has an excessive buoyancy so as not to be submerged in water even in a stormy state after organisms are attached.

As shown in FIG. 4, the mooring line 10 includes a main line 10A at the center and two backup lines 10B and 10C arranged on both sides. That is, the upper part of the mooring line 10 is branched to provide a main line 10A and spare lines 10B and 10C, and the spare lines 10B and 10C are connected to the triangular member 23 in a state of being slackened downward. The main line 10A constitutes a mooring line 10 that is continuous via a triangular member 23. Therefore, until the main line 10A is broken, the mooring tension does not act on the preliminary lines 10B and 10C, and the preliminary lines 10B and 10C continue to maintain the initial strength. In other words, if the spare lines 10B and 10C are configured to have the same strength as the main line 10A, the mooring capacity equivalent to that at the initial stage can be secured even after the main line 10A is broken. As a result, the risk of a runaway accident can be avoided for a long period of time, and as a result the service life of the floating reef of the present invention can be improved.

As shown in FIGS. 5A and 5B, an eye plate 12A for connecting the main line 10A is projectingly provided on the lower surface 13 of the column 2. A pair of connecting fittings 14 are connected to the eye plate 12A so as to be sandwiched from both sides via a round pin 19 described later, and are rotatable in a vertical plane of the floating reef in the front-rear direction. A universal joint 16 is joined to a lower portion of the connecting fitting 14 in a direction orthogonal to the connecting fitting 14, and a round pin shackle 17 is attached to the universal joint 16 via a round pin 19. Therefore, the round pin shackle 17 is rotatable via the universal joint 16 in a vertical plane (in the horizontal plane of the floating reef) orthogonal to the rotation plane of the coupling fitting 14. With such a structure, the axial center of the round pin 19 of the round pin shackle 17 is always orthogonal to the load direction by the universal joint 16 against the swinging motion of the floating reef in the front-rear and left-right directions so that no moment acts on the round pin 19. It has become. As a result, the local contact surface pressure between the round pin 19 and the eye plate 12A is prevented from increasing, and wear of the shackle pin 19 and the lower end of the hole 18 of the eye plate 12A is further reduced.

A circular hole 18 is opened in the center of the eye plate 12 A, the connecting fitting 14, the universal joint 16 and the round pin shackle 17, and a round pin 19 is fitted into this hole 18. That is, this reduces the contact surface pressure between the round pin 19 and the eye plate 12, the connecting fitting 14, the natural joint 16 and the round pin shackle 17, and the eye plate 12, the connecting fitting 14, the universal joint 16 and the round pin. Fit the gap between the round pin 19 and the eye plate 12, the connecting bracket 14, the universal joint 16 or the round pin shackle 17 so that the round pin 19 rotates smoothly in the hole 18 of the shackle 17 without looseness. This is because they are joined together to form a structure with excellent wear resistance. In FIG. 6, eye plates 12B and 12C for connecting the spare lines 10B and 10C are provided on the lower portion 13 of the column 2 so as to project, and the round pin shackle 17 is connected through the round pin 19. In this case as well, the effect of reducing wear of the eye plate and the round pin shackle can be obtained as in the above case. In addition, in both the main line 10A and the spare lines 10B and 10C, an expansion link 21 and a plurality of ordinary links 22 are connected via a terminal link 20 after the round pin shackle 17, respectively.

[0031]

[Effect of device]

 According to the first to fourth aspects, it is possible to achieve a dramatic improvement in the service life of the floating reef while improving the effect of collecting fish.

According to the first aspect, the functions of both the artificial seabed structure and the stable rudder are combined to stabilize the load direction in the connecting portion of the mooring line, that is, the degree of wear and damage of the connecting portion is reduced, so that the mooring is reduced. The effect of preventing breakage of the line can be improved.

According to the second aspect, in addition to the stability of the artificial seabed structure against shaking, the wear of the shackle pin and the wear of the lower end of the eye plate hole are prevented by improving the connection part of the mooring line. The breaking prevention effect of the mooring line can be improved.

According to the third aspect, the universal joint prevents the axial center of the round pin of the round pin shackle from being always orthogonal to the load direction and prevents a moment from acting on the round pin against the rocking motion of the floating reef. As a result, it is possible to prevent the local contact surface pressure between the round pin and the eye plate from rising and further reduce the wear of the shackle pin and the lower end of the eye plate hole.

If a spare line having the same strength as the main line is provided above the mooring line as in claim 4, the mooring tension does not act on the spare line until the main line is broken, so As a result, the preliminary line continues to retain its almost initial strength, and the mooring capacity equivalent to the initial level can be secured even after the main line breaks.

[Brief description of drawings]

FIG. 1 is a side view of a floating reef installed on the sea surface by a single-point mooring method.

FIG. 2 is an enlarged side view of the floating reef.

FIG. 3 is an enlarged plan view of the artificial seabed structure.

FIG. 4 is an enlarged view of a connecting portion of a mooring line including a floating reef column and a backup line.

FIG. 5 is an enlarged detailed view of a connecting portion between the lower part of the column and the main line, where (a) is a view on arrow BB in (b), and (b) is (a).
FIG.

FIG. 6 is an enlarged detailed view of a connecting portion between a lower part of a column and a backup line, in which (a) is a front view and (b) is a side view.

[Explanation of symbols]

 K ... floating reef 1 ... artificial seabed structure 2 ... column 3 ... surface floating body 8 ... stable rudder 8a-8c ... vertical stabilizer 8d ... horizontal stabilizer 10 ... mooring line 10A ... main line 10B, 10C ... spare line 12 ... eye plate 12A ... Eye plate (for main line) 12B, 2C ... Eye plate (for spare line) 13 ... Lower part of column 14 ... Connection fitting 16 ... Universal joint 17 ... Round pin shackle 19 ... Round pin

Claims (4)

[Scope of utility model registration request] 1. A surface floating body floating above the surface of the sea, a column hanging from the lower end of the surface floating body into the sea and connecting a mooring line to the lower part, and having a wide area in a planar shape horizontally provided under the column. A floating reef comprising an artificial seabed structure, wherein a stable rudder including a vertical tail and a horizontal tail is provided at one end of the plane of the artificial seabed structure. 2. A surface floating body floating above the surface of the sea, a column hanging from the lower end of the surface floating body into the sea and connecting a mooring line to the lower part, and having a wide area in a planar shape horizontally provided at the lower part of the column. A floating fish reef having an artificial seabed structure, wherein an eye plate provided at a lower portion of the column and a mooring line are connected via a round pin shackle having a round pin having a circular cross section. 3. A surface floating body floating above the surface of the sea, a column hanging from the lower end of the surface floating body into the sea and connecting a mooring line to the bottom, and having a large planar area horizontally provided at the bottom of the column. In a floating fish reef composed of an artificial seabed structure, between the eye plate provided at the bottom of the column and the round pin shackle at the upper end of the mooring line, the eye plate and the circular plate are rotatably movable in a vertical plane in the front-rear direction of the floating fish reef. A floating metal reef characterized in that a connecting metal fitting connected by a pin is provided, and a universal joint for connecting the round pin shackle is rotatably provided in a lower portion of the connecting metal fitting in a vertical plane orthogonal to a rotation surface of the connecting metal fitting. . 4. A surface floating body floating above the surface of the sea, a column hanging from the lower end of the surface floating body into the sea and connecting a mooring line to the lower part, and having a large planar area horizontally provided in the lower part of the column. In a floating reef consisting of an artificial seabed structure, a spare line is diverged from the upper part of the mooring line,
A floating fish reef characterized by connecting this spare line to the eye plate provided at the bottom of the column with slack.