JP2002309541A - Wave dissipating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wave dissipating device with excellent wave-dissipating and buffering effects. SOLUTION: The wave-dissipating device 1 is installed, for example, in a boat-racing course, has the function of attenuating waves, and comprises an outer tube 2 constructed of nets and a plurality of inner tubes 3 constructed of nets and stored in the outer tube. The mesh of the outer tube 2 differs in shape from the mesh 31 of the inner tube 3. The mesh of the outer tube 2 is less than the mesh 31 of the inner tube 3 in size. Bar-shaped float members 32 are inserted into the inner tubes 3 located in the vicinity of the surface of water. In this case, no float member 32 is inserted into the inner tubes adjacent the inner peripheral surface of the outer tube 2. This arrangement imparts appropriate buoyancy to the wave-dissipating device 1 while showing an excellent damping function in the event that a boat collides against the device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wave absorber installed in, for example, a boat racecourse, a pool, and other riversides, lakes, reservoirs, and the sea.

[0002]

2. Description of the Related Art For example, in a boat racetrack, waves are generated on a water surface on a course as a boat travels. For boats that run at high speeds, if they receive return waves or torsional waves, they may overturn, and from the viewpoint of danger prevention, install a wave absorber,
It is necessary to attenuate the generated waves.

Conventionally, as this type of wave absorber, a styrene foam wave absorber and a net-shaped wave absorber are known.

[0004] However, all of these wave cancelers have the drawback that the waves cannot be sufficiently attenuated and the wave canceling effect is insufficient.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned drawbacks of the prior art, and has as its object to provide a wave canceling device having a high wave canceling effect.

It is another object of the present invention to provide a wave canceling device having a high wave canceling effect and a buffer function.

[0007]

The inventor of the present invention has conducted intensive studies on a structure for obtaining a high wave-eliminating effect. By changing the size of the mesh, a high wave-eliminating effect can be obtained, and further, by setting the opening area, ratio, opening shape, etc. of the mesh of each cylindrical body as desired, a higher noise-elimination effect can be obtained. The inventors have found that a wave effect can be obtained, and have reached the present invention.

[0008] That is, the above objects are as follows.
0) is achieved by the present invention.

(1) A wave absorber in which a plurality of inner cylinders formed of a mesh are stored in an outer cylinder formed of a mesh, wherein a mesh shape of the outer cylinder and the inner cylinder are provided. Wherein the mesh shape of the outer cylinder is different and the size of the mesh of the outer cylinder is smaller than the size of the mesh of the inner cylinder.

(2) Inside at least one inner cylinder,
The wave absorber according to the above (1), wherein a rod-shaped float member is inserted.

(3) The wave canceling device according to (2), wherein the float member is not inserted into the inner cylinder positioned at the outermost periphery of the bundle of the inner cylinders.

(4) A wave absorber in which a plurality of inner cylinders formed of a mesh are stored in an outer cylinder formed of a mesh, wherein the size of the mesh of the outer cylinder is smaller than that of the inner cylinder. A wave absorber characterized in that a rod-shaped float member is inserted into at least one inner cylinder excluding the inner cylinder adjacent to the inner peripheral surface of the outer cylinder, the size being smaller than the mesh size of the cylinder. .

(5) The wave absorber according to any one of (2) to (4), wherein a rod-shaped float member is inserted into the inner cylinder located near the liquid level.

(6) The wave absorber according to any one of (2) to (5), wherein the float members are arranged in a row along a direction parallel to a liquid surface.

(7) The wave canceling device according to any one of (1) to (6), wherein both ends of the outer cylinder are closed by a mesh.

(8) When the inner diameter of the outer cylinder is D1 and the outer diameter of the inner cylinder is D2, the outer diameter ratio D2 / D1 is 0.01.
The wave absorber according to any one of the above (1) to (7), wherein the number is from 0.5 to 0.5.

(9) At least one of the outer cylinder and the inner cylinder is made of a resin material, and the intersection of the nets is fixed or integrated by melting at any one of the above (1) to (8). The wave absorber according to the above.

(10) The above (1) installed in a boat racetrack
The wave absorber according to any one of (1) to (9).

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the wave absorber according to the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 is an overall side view showing an embodiment of a wave absorber according to the present invention installed on a water surface, and FIGS. 2 and 3.
Is a side view and a front view, respectively, of the wave canceler, and FIGS. 4 and 5 are a side view and a front view, respectively, showing the configuration inside the outer cylinder of the wave canceler.

The wave breaking device 1 shown in these figures is installed in a boat racetrack, and is mainly composed of an outer cylinder 2 and a plurality of inner cylinders 3 housed in the outer cylinder 2. ing.

The outer cylinder 2 is a net-like body (mesh, net, etc.)
, And in the present embodiment, has a substantially cylindrical shape.
The inner cylinder 3 is also formed of a mesh (mesh, net, etc.), and has a substantially cylindrical shape in the present embodiment. The configuration of these nets will be described later in detail.

The inner cylinder 3 is composed of a plurality of
Is housed inside. The end of each inner cylinder 3 is also covered by the outer cylinder 2 (see FIG. 3).

Each of the inner cylinders 3 is bound by ropes 4 at a plurality of points along the longitudinal direction. The interval between the adjacent ropes 4 is, for example, 0.3 to 2.5 m. Needless to say, the method of bundling the inner cylinders 3 is not limited to the case where the ropes 4 are used. A ring-shaped frame member 5 is provided at an end of the inner cylinder 3.

A mooring band 6 for fixing the wave absorber 1 is wound around the outer circumference of the outer cylinder 2. The mooring bands 6 are installed at a plurality of locations along the longitudinal direction of the outer cylinder 2. The interval between the adjacent mooring bands 6 is, for example, 1 to 12 m.

A shackle 7 is attached to each end of the mooring band 6, and both shackles 7
For example, a chain 8 made of stainless steel is engaged. This chain 8 is connected to a concrete anchor (not shown) installed on the bottom of the water, whereby the wave absorber 1 is fixed at a predetermined position.

It is preferable that both chains 8 are connected to a concrete anchor at the bottom in a crossed state, as shown in FIG. Thereby, the roll of the wave absorber 1 can be effectively prevented. Further, the length of the chain 8 is preferably at least twice the water depth, especially at least three times the water depth. As a result, high stability can be maintained even in places where the tides rise and fall.

Further, as shown in FIG. 2, separate shackles 9 are attached to the lower portions (underwater) of both ends of the outer cylinder (not shown in FIG. 3). The shackle 9 at one end is connected to a turn mark 11 via a chain 10, and the shackle 9 at the other end is connected to a round buoy 13 via a chain 12.

In the wave canceling device 1 of the present invention, the outer cylinder 2 and the inner cylinder 3 are each formed of a mesh (mesh, net, etc.), but their mesh sizes are different.

That is, the size of the mesh 21 of the outer cylinder 2 is
It is smaller than the size of the mesh 31 of the inner cylinder 3. Thereby, the following effects are exhibited.

An even better wave-eliminating effect (wave-attenuating effect) is obtained. Both the outer cylinder 2 and the inner cylinder 3 have elasticity and elasticity.
Since the bundle functions as a core material, a high damping function is exhibited while maintaining sufficient strength as the entire wave canceling device 1. Therefore, safety in the event of a boat collision (effects of preventing damage to the boat and preventing injuries of the players, etc.) is high. Suspended matter such as garbage passes through the mesh of the outer cylinder 2 and
It is hard to penetrate into the inside, so that a high wave breaking effect can be maintained.

In particular, in the present invention, one mesh 2 of the outer cylinder 2 is used.
Assuming that the opening area (opening area) of No. 1 is S1 and the opening area (opening area) of one mesh 31 of the inner cylinder 3 is S2, the opening area ratio S1 / S2 is about 0.05 to 0.9. Is preferably, about 0.08 to 0.75, more preferably about 0.15 to 0.65. When the opening area ratio is within this range, each of the above effects, particularly the effect, is more remarkably exhibited.

The opening area S1 of one mesh 21 of the outer cylinder 2
Is not particularly limited, but is preferably about ² 0.8～40Cm, more preferably ² about 1.6～30Cm, even more preferably about ² 2.8～25Cm. If the opening area S1 is too large, the effect of preventing intrusion of suspended matter such as dust is reduced, and if the opening area S1 is too small, the wave canceling effect is reduced when the opening ratio is small. Sometimes. In addition, both ends of the outer cylinder 2 are closed as shown in FIGS. 2 to 4 in order to prevent intrusion of dust and the like into the outer cylinder 2. That is, both ends of the outer cylinder 2 are each extended to the end face 22 thereof,
The mesh itself is also formed of a similar mesh having a mesh 21 (see FIG. 3). Thereby, the wave-breaking effect is also exerted on the end face 22.

The opening area S2 of one mesh 31 of the inner cylinder 3
Is not particularly limited, but is preferably about ² 1.2～64Cm, more preferably ² about 2～50Cm, even more preferably about ² 3.5～38Cm. When the opening area S2 is in such a range, a particularly excellent wave-eliminating effect is exhibited.

The opening ratio (opening ratio) of the mesh 21 of the outer cylinder 2 is
Although not particularly limited, it is preferably about 40 to 93%, more preferably about 50 to 90%, and 55%.
More preferably, it is about 80%. If the aperture ratio is too small, the wave-breaking effect decreases, and if the aperture ratio is too large,
The strength decreases and the buffering effect decreases.

The opening ratio (opening ratio) of the mesh 31 of the inner cylinder 3 is
Although not particularly limited, it is preferably about 35 to 91%, more preferably about 44 to 85%, and 50%.
More preferably, it is about 80%. If the aperture ratio is too small, the wave-breaking effect decreases, and if the aperture ratio is too large,
For example, when the outer diameter of the inner cylinder 3 is large, the strength of the inner cylinder 3 is reduced, and the buffer effect is reduced.

The shape of the mesh 21 of the outer cylinder 2 and the shape of the mesh 31 of the inner cylinder 3 may be the same or different. However, in order to improve the wave canceling effect, the shapes of these meshes are different. Preferably, it is

For example, in the present embodiment, the mesh 2
The shape of 1 is approximately hexagon (regular hexagon, other hexagon),
The shape of the mesh 31 of the inner cylinder 3 is substantially square (square, rectangle, rhombus, parallelogram, etc.). In addition, both meshes 2
The shapes of 1, 31 may be a combination of a polygon and a circle, a polygon and an ellipse, a combination of a circle and an ellipse, or may be non-similar quadrangles or hexagons.

Needless to say, the combination of the shapes of the meshes 21, 31 of the outer cylinder 2 and the inner cylinder 3 is not limited to this.

The outer cylinder 2 and the inner cylinder 3 are preferably made of a resin material. The resin material has no problem of rust and corrosion, is lightweight, has moderate buoyancy, is excellent in handleability and durability, and has a resilience to deformation when formed into a tubular mesh, so it has an excellent cushioning function Demonstrate.

The resin material constituting the outer cylinder 2 and the inner cylinder 3 is, for example, polyolefin such as polyethylene and polypropylene, polyester such as polyethylene terephthalate, polyvinyl chloride, polyamide, polytetrafluoroethylene, polystyrene, or these. And a polymer blend containing at least one of the above. The constituent material of the outer cylinder 2 and the constituent material of the inner cylinder 3 may be the same or different.

In the outer cylinder 2 and the inner cylinder 3 made of such a resin material, it is preferable that the intersections of the nets are fixed or integrated by melting. As a result, mesh breakage does not occur, breakage can be prevented, durability can be improved, and excellent restoring force against deformation can be obtained, so that impact resistance is excellent and a high cushioning function can be obtained.

The diameters of the outer cylinder 2 and the inner cylinder 3 are not particularly limited. When the inner diameter of the outer cylinder 2 is D1 and the outer diameter of the inner cylinder 3 is D2, the outer diameter ratio D2 / D1 is 0.01 to 0.01. It is preferably about 0.5, more preferably about 0.04 to 0.39, and even more preferably about 0.06 to 0.34. If the outer diameter ratio is too small, the S1 / S2
Is difficult to set in an appropriate range, and when the outer diameter ratio is too large, the number of the inner cylinders 3 inserted into the outer cylinder 2 is reduced, and the improvement of the wave canceling effect is reduced. is there.

In the present embodiment, the outer cylinder 2 and the inner cylinder 3 have a substantially cylindrical shape. However, the present invention is not limited to this. ,
A shape other than a circle, such as a polygon such as a hexagon and an octagon, an ellipse, and a semicircle, may be used.

In the present invention, a plurality of kinds of inner cylinders 3 having different diameters (dimensions), a plurality of kinds of inner cylinders 3 having different shapes, and a plurality of kinds of inner cylinders 3 having different mesh sizes and aperture ratios are provided in the outer cylinder 2. The inner cylinder 3 can be inserted.

As shown in FIGS. 4 and 5, a rod-like float member 32 is inserted into some of the inner cylinders 3. By installing the float member 32, the wave absorber 1
Can moderately adjust the buoyancy.

When there are many parts submerged below the liquid surface 14, the wave-breaking device 1 has a high wave-breaking effect, but a small buffering effect when a boat collides. Conversely, if there are many portions exposed above the liquid level 14, the wave-eliminating effect is reduced, but the buffering effect when the boat collides is increased. Therefore, in order to achieve both a wave breaking effect and a buffer effect, the float member 32 is installed,
The buoyancy of the wave absorber 1 is adjusted. That is, as shown in FIGS. 4 and 5, the float member 32 is inserted into the inner cylinder 3 located near the liquid surface 14 to appropriately adjust the buoyancy of the wave absorber 1, so that the wave absorber And a buffering effect can be compatible.

The float members 32 are arranged in a row along a direction parallel to the liquid surface 14. Here, in the illustrated configuration, the float members 32 are arranged in a line along a direction parallel to the liquid surface 14, but may be arranged in a plurality of lines.

As described above, the float member 32 is moved to the liquid level 14.
By arranging them in a row along the direction parallel to the above, the inner cylinder 3 into which the float member 32 is inserted functions as a core material (increases in strength), and even when the wave absorber 1 receives waves, It prevents twisting of the device 1 and exhibits an excellent wave canceling effect.

Further, as shown in FIG.
2 is preferably inserted inside the inner cylinder 3 except for the inner cylinder adjacent to the inner peripheral surface of the outer cylinder 2 (the inner cylinder located at the outermost circumference of the bundle of the inner cylinders 3). As a result, the wave canceling effect is further improved, and the following effects can be obtained.

As described above, the strength of the inner cylinder 3 into which the float member 32 is inserted is increased. However, the float member 32 must not be inserted into the inner cylinder 3 adjacent to the inner peripheral surface of the outer cylinder 2. Accordingly, at the time of collision of the boat, the inner cylinder 3 is easily deformed, and exhibits an excellent cushioning function.

In the present invention, it is possible to store the float member 32 as it is (without inserting it into the inner cylinder 3) in the outer cylinder 2 and bundle it together with the inner cylinder 3. The insertion increases the space efficiency and allows more inner cylinders 3 to be accommodated in the outer cylinder 2 in the same space, thus contributing to the improvement of the wave canceling effect.

The float member 32 is not particularly limited as long as it can give buoyancy.
Foams such as foamed polyethylene, foamed styrene, foamed polyurethane, and the like can be given. In addition, the float member 32
It may be a hollow body.

Although the illustrated float member 32 has a circular cross section, the shape of the float member 32 is not limited to this. Also, a plurality of float members may be inserted into one inner cylinder 3.

The length of the float member 32 may be substantially equal to or shorter than the length of the inner cylinder 3 into which the float member 32 is inserted. For example, a plurality of short float members 32 may be connected and inserted into the inner cylinder 3.

The wave canceling device 1 as described above exhibits an excellent wave canceling effect even for waves of any kind and under any conditions, but in particular, runs at a high speed (for example, about 20 to 85 km / h). A special wave generated by a boat for boat racing, that is, a wavelength of about 0.8 to 5 m (particularly about 1 to 3.5 m) and an amplitude (wave height) of about 10 to 150 mm (particularly 2
It is suitable for attenuating waves of about 0 to 100 mm).

From the above, the wave canceling device 1 of the present invention is used.
Is suitable for being installed in a boat racetrack. The installation position in the boat racetrack is not particularly limited, and it can be installed at any place where wave breaking or buffering is required, such as an outer peripheral portion or a central portion of the course.

Next, the operation of the wave canceler 1 will be described. For example, a wave propagated from a direction orthogonal to the longitudinal direction of the wave absorber 1 first contacts the outer cylinder 2 of the wave absorber 1 and is attenuated when passing through the mesh.

Further, the waves that have entered the outer cylinder 2 after passing through the mesh of the outer cylinder 2 come into contact with the bundle of the inner cylinders 3 and are greatly attenuated when passing through the meshes of the plurality of inner cylinders 3. You.

Further, the waves that have passed through the bundle of the inner cylinders 3 come into contact with the outer cylinder 2 from the inside and are attenuated when passing through the mesh.

As described above, since the waves pass through the mesh of the outer cylinder 2 and the inner cylinder 3 many times, an excellent wave-eliminating effect is exhibited. In particular, since the sizes and shapes of the meshes of the outer cylinder 2 and the inner cylinder 3 are different, the wave-eliminating effect is high, and even if the waves have different wavelengths (periods) and amplitudes (wave heights), they are effectively attenuated. Can be.

Further, the wave canceling device 1 exhibits an excellent wave canceling effect, similarly to the above, with respect to a wave transmitted from a direction oblique to the longitudinal direction.

As described above, the wave canceling device 1 exhibits an excellent wave canceling effect irrespective of conditions such as the type of wave and the propagation direction.

When the boat collides with the wave absorber 1, the outer cylinder 2 and the inner cylinder 3 have elasticity and effectively absorb the impact. Therefore, the safety of the player on the boat is ensured.

Although the wave canceling device according to the present invention has been described based on the illustrated embodiment, the present invention is not limited to this, and the structure of each part may be any structure having the same function. It is possible to replace it with something.

In the present invention, a portion satisfying the above-described conditions may be partially (particularly intermittently) present with respect to the entire length of the wave canceling device.

The wave breaking device 1 of the present invention is not limited to the one installed in a racetrack, but may be installed and used in a pool, river, lake, reservoir, sea or the like.

[0068]

As described above, according to the present invention, there is provided a wave canceling device exhibiting an excellent wave canceling effect. Also,
A wave absorber having a buffer function is also provided. In particular, it is possible to prevent intrusion of dust and the like into the inside and maintain these effects.

[Brief description of the drawings]

FIG. 1 is an overall side view showing a state in which an embodiment of a wave absorber according to the present invention is installed on a water surface.

FIG. 2 is a side view of the wave canceling device of the present invention.

FIG. 3 is a front view of the wave canceling device of the present invention.

FIG. 4 is a side view showing the configuration inside the outer cylinder of the wave canceling device of the present invention.

FIG. 5 is a front view showing a configuration inside an outer cylinder of the wave canceling device of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Wave canceler 2 Outer cylinder 21 Mesh 22 End face 3 Inner cylinder 31 Mesh 32 Float member 4 Rope 5 Frame member 6 Mooring band 7 Shackle 8 Chain 9 Shackle 10 Chain 11 Turn mark 12 Chain 13 Round buoy 14 Liquid surface

Claims (10)

[Claims] 1. A wave absorber in which a plurality of inner cylinders formed of a net are housed in an outer cylinder formed of a net, wherein a mesh shape of the outer cylinder and a shape of a mesh of the inner cylinder are provided. A wave absorber characterized in that the mesh shape is different and the mesh size of the outer cylinder is smaller than the mesh size of the inner cylinder. 2. The wave absorber according to claim 1, wherein a rod-shaped float member is inserted into at least one inner cylinder. 3. The wave canceling device according to claim 2, wherein the float member is not inserted into the inner cylinder located at the outermost periphery of the bundle of the inner cylinders. 4. A wave absorber in which a plurality of inner cylinders formed of a net are housed in an outer cylinder formed of a net, wherein the size of the mesh of the outer cylinder is smaller than that of the inner cylinder. A rod-shaped float member is inserted into at least one inner cylinder excluding the inner cylinder adjacent to the inner peripheral surface of the outer cylinder. 5. The wave absorber according to claim 2, wherein a rod-shaped float member is inserted into the inner cylinder located near the liquid surface. 6. The wave absorber according to claim 2, wherein the float members are arranged in a row along a direction parallel to a liquid surface. 7. The wave absorber according to claim 1, wherein both ends of the outer cylinder are closed by a mesh. 8. When the inner diameter of the outer cylinder is D1 and the outer diameter of the inner cylinder is D2, the outer diameter ratio D2 / D1 is 0.01 to 0.1.
The wave absorber according to any one of claims 1 to 7, which is 5. 9. The wave absorber according to claim 1, wherein at least one of the outer cylinder and the inner cylinder is formed of a resin material, and an intersection of the nets is fixed or integrated by melting. apparatus. 10. A boat racetrack installed in a racetrack.
The wave absorber according to any one of the above.