JP2001295244A - Wave-absorbing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wave absorbing device having a float and a wave absorption section suspended from the float, capable of sufficiently obtaining wave absorbing performance in an installed state without increasing the weight of the whole device and adaptable to a water area shallow in depth. SOLUTION: The wave absorbing section 3 is formed with a pair of suspended sheets 31 and 32 suspended from the float 2 and arranged to face the propagating direction of waves and a horizontal sheet 33 connecting both suspended sheets 31 and 32 together and extended in the horizontal direction. A region surrounded by the suspended sheets 31 and 32, the horizontal sheet 33, and the lower face of the float 2 is used as a water holding area K. When this wave absorbing device 1 is installed in an installation water area, water flows into the water holding area K, additional weight is given to the wave absorbing device 1 to increase inertial force, thereby the wave absorption performance is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wave absorber for attenuating wind waves, sailing waves, and the like. In particular, the present invention relates to an improvement for obtaining a wave canceling device that can exhibit sufficient wave canceling performance with a relatively simple configuration.

[0002]

2. Description of the Related Art Conventionally, there is known a wave canceling device used to suppress the propagation of wind waves, sailing waves, and reflected waves to a maritime marina or the like. As one example, a large float is installed between a maritime marina and the open sea, and waves propagating from the open sea toward the marina are made to collide with the float and be attenuated.

However, in the case of this configuration, it is necessary to employ a large float in order to obtain sufficient wave-elimination performance.
Its weight also increases. For this reason, there is a problem that the installation work of the wave canceling device becomes large, the manufacturing cost and the installation work cost are increased, and the practicality is lacking. In addition, since the weight of the float is large, the draft size becomes large, and it may not be applicable to a marina having a shallow water depth.

[0004] In view of this point, Japanese Patent Application Laid-Open No.
A breakwater disclosed in 229351 has been proposed. This wave breaker has a configuration in which cylindrical floats are connected in series, and a wave breaker curtain is suspended from each float. As a result, the waves are attenuated by wave-breaking curtains, suppressing the propagation of waves to the maritime marina, suppressing the movement of moored ships (boats and yachts), and preventing collisions between ships and contact with ships' quays. To avoid the damage.

[0005]

However, in the breach bank disclosed in the above publication, the wave-breaking curtain is simply hung from the float, so that the wave-breaking curtain is easily bent. There is a high possibility that the wave will be allowed to propagate to the maritime marina, and it has not yet been said that sufficient and reliable wave-dissipating performance has been obtained.

In such a wave-breaking device, if the weight of the wave-breaking curtain itself is increased, or if the wave-breaking curtain is made of a hard material (a material that is not easily bent such as metal), The wave breaking performance of the wave breaking curtain can be improved. However, in this case, the weight of the entire wave canceling device is increased, and as in the above-described case, the installation work of the wave canceling device becomes large and the manufacturing cost and the installation work cost increase. In addition, when the wave-breaking curtain is made of a hard material, the lower end of the wave-breaking curtain comes into contact with the sea floor at low tide, and the float cannot be maintained in a floating state, and the function as a wave-breaking device cannot be achieved. May be lost.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and it is an object of the present invention to increase the weight of the entire apparatus, and yet to obtain sufficient wave-breaking performance in an installed state. Another object of the present invention is to provide a wave breaking device that can be applied to a shallow water area.

[0008]

Means for Solving the Problems-Summary of the Invention-In order to achieve the above object, the present invention provides a water retaining area formed of a flexible sheet material, and a wave absorber installed in an installation water area. When installed, water flows into the water retention area, thereby adding additional weight to the wave canceling device and increasing the inertia force, thereby improving wave breaking performance.

-Solution Means [0009] Specifically, in the first solution means, the wave-breaking device is provided with a float floating on the water surface and a wave-breaking part suspended from the float. The wave-absorbing portion is formed of a flexible wave-absorbing sheet, and a water-retaining area is formed that allows the inflow of water in the installation water area and surrounds both sides and the lower side in the wave propagation direction. And

According to this particular matter, the weight of the wave absorber before being installed in the installation water area is substantially equal to the sum of the weight of the float and the weight of the wave absorber, and is relatively light. In contrast,
When the wave absorber is installed in the installation water area, the water in the installation water area flows into the water retention area. Thereby, the wave absorber is given an additional weight corresponding to the weight of the water in the water holding area, and the inertia force of the wave absorber is greatly increased. In such a situation, when a wave collides with the wave absorber, a part of the impact force of the wave is received by the water in the water retaining area, and the wave is attenuated. In addition, since the inertia of the wave absorber is increased by the water in the water retention area, the wave absorber does not easily move up and down due to the influence of the wave, but receives the impact force well and attenuates the wave. Let it. Also,
Since the wave-absorbing portion is formed of a flexible wave-absorbing sheet, when applied to a shallow water area, the wave-absorbing sheet easily bends according to the water depth, and the function as a wave-absorbing device is achieved. Well maintained.

According to a second aspect of the present invention, in the first aspect, the wave eliminating portion includes a hanging sheet and a horizontal sheet. The hanging sheet is made up of a pair suspended from the float and arranged to face the wave propagation direction. The horizontal sheet extends in the horizontal direction by connecting both hanging sheets. An area surrounded by each hanging sheet, horizontal sheet, and lower surface of the float is defined as a water retention area.

[0012] According to this specific matter, the water retention area can be formed by three sheets of material, and the high wave breaking performance can be exhibited as described above, while the wave breaking device has a relatively simple configuration. .

According to a third aspect of the present invention, in the second aspect, a weight is attached to a lower end portion of each hanging sheet.
Thereby, the posture of each hanging sheet is maintained so as to extend in the vertical direction, the volume of the water holding area can be sufficiently secured, and it is possible to reliably provide a sufficient additional weight to the wave absorber. .

According to a fourth aspect of the present invention, in the above second to third aspects, a float is configured by combining a plurality of float elements which are arranged along a water surface and are detachable from each other. This makes it possible to arbitrarily set the shape of the float depending on the combination of the float elements. For example, the versatility of wave absorbers can be configured by combining a small number of float elements to form a small and simple wave absorber, or by combining a large number of float elements to form a large float that can be used as a floating pier. Can be expanded.

According to a fifth aspect of the present invention, in the fourth aspect of the present invention, the hanging sheet is constituted by a single sheet material arranged over a plurality of float elements. By configuring the hanging sheet with a relatively large sheet in this way, the area for receiving the waves can be enlarged, and sufficient wave-damping performance can be obtained. For example, when a hanging sheet is provided for each float element, a wave passes between adjacent hanging sheets, and the number of passing points is as large as the number of float elements arranged in the extending direction of the hanging sheet. It may not be possible to perform sufficient attenuation. In the present solution, a sheet material is arranged over a plurality of float elements in order to prevent the passage of the wave.

According to a sixth aspect of the present invention, in any one of the first to fifth aspects, the float is allowed to move only in the vertical direction by means of a column driven into the water bottom and extending in the vertical direction. I support it. For this reason, the float can be prevented from moving in the direction in which the water surface extends, and the impact of the wave can be reliably received by the entire wave-cancelling device, thereby improving the wave-cancelling performance.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. In this embodiment, a case will be described in which the wave breaking device according to the present invention is applied to a ship mooring facility provided in a river. In addition, this wave breaking device can be applied not only to a ship mooring facility on a river, but also to a maritime marina and other mooring facilities provided on a canal.

FIG. 1 is a plan view of the vicinity of a ship mooring facility M in which the wave absorber 1 according to the present embodiment is installed. As shown in this figure, the wave breaking device 1 is installed between the ship mooring facility M and the open sea S so as to extend along the coastline. FIG. 1 shows a state in which the wave absorbers 1 and 1 are installed at two locations at a predetermined distance (for example, 50 m) from the shoreline. These wave absorbers 1, 1 are provided by a ship B (boat or yacht) between them.
Are separated by a predetermined distance in order to allow the passage of the vehicle.

Next, the configuration of the wave canceling device 1 will be described. Each of the wave cancelers 1 and 1 has the same configuration. Therefore, only one wave absorber 1 will be described here.

FIG. 2 is a perspective view showing the installed state of the wave canceler 1, and FIG. 3 is a plan view showing the installed state of the wave canceler 1. As shown in these figures, the wave absorber 1 is provided with a float 2
And a wave-eliminating part 3 suspended from the float 2. Hereinafter, each of the units 2 and 3 will be described in detail.

<Explanation of Float 2> The float 2 is constructed by integrally combining a plurality of float elements 21, 21,. FIG. 4 is a plan view in which a part of the float element 21 is broken, and FIG. 5 is a cross-sectional view along the line VV in FIG. As shown in these figures, the float element 21 is formed of a resin molded article formed in a hollow, substantially cubic shape. Each of the upper corner portions (four corner portions) of the float element 21 has an inclined surface 2 extending from the upper surface 22 to the side surface 23.
4 is provided. This inclined surface 24 corresponds to the float element 21.
The shape is slightly depressed toward the internal space. For this reason, as shown in FIG. 3, in a state where the corner portions of the four float elements 21, 21,... Abut each other, the inclined surfaces 24, 24,. Is formed.

On the other hand, a concave portion 26 is formed below the inclined surface 24 on the side surface 23 of the float element 21. When the corner portions of the four float elements 21, 21,...
The recesses 26, 26,... Are continuous to form an annular recess (an engagement recess for engaging the peg 4 described later).

Further, connecting pieces 27A to 27D protrude below the concave portion 26 on the side surface 23 of the float element 21. That is, the connecting pieces 27 extending outward in the horizontal direction are provided at four corners on the side surface 23 of the float element 21.
A to 27D are protruded respectively.

The four connecting pieces 27A to 27D have different arrangement height positions. Specifically, FIG.
In FIG. 4, the first connecting piece 27A located at the upper right is at the highest position, and the second connecting piece 27 located at the lower right in FIG.
B is formed at a position lower than the projecting height position of the first connecting piece 27A by the thickness dimension of the first connecting piece 27A. In addition, the third connecting piece 2 located at the lower left in FIG.
7C is formed at a position lower than the projecting height position of the second connecting piece 27B by the thickness of the second connecting piece 27B. Similarly, the fourth connecting piece 27D located at the upper left in FIG. 4 is higher than the projecting height position of the third connecting piece 27C.
The third connecting piece 27C is formed at a position lower by the thickness dimension of the third connecting piece 27C. As described above, the connection pieces 27A to 27D have different arrangement height positions. In addition, each connecting piece 27A-2
A circular opening 28A penetrating vertically in the center of 7D
To 28D are formed.

The four float elements 21, 21 and 21
When the corner portions of... Abut against each other, as shown in FIG. 6, the second connecting piece 27B is provided below the first connecting piece 27A, and the third connecting piece 27C is provided below the second connecting piece 27B. Are combined with each other so that the fourth connection piece 27D is overlapped with the lower side of the third connection piece 27C, respectively, so that the opening 28A of each of the connection pieces 27A to 27D is formed.
.. 28D are aligned with each other, and the side surfaces 23 of the four float elements 21, 21,. In this state, the openings 28A to 28D
Are driven into the pegs 4 from above to connect the four float elements 21, 21,... To the connecting pieces 27A to 27A.
It is in a state of being integrally connected via D. The peg 4 has an annular protrusion 41 formed at a position corresponding to the recess 26 formed in each float element 21. The protrusion 41 fits into the recess 26, thereby forming the peg 4. But do not fall off easily. In this manner, the plurality of float elements 21, 21,... Are integrally assembled, and the float 2 as shown in FIGS.
Is configured. The float 2 shown in these figures has four float elements 21, 21, ... in the width direction, and ten float elements 21, 21, ... in the longitudinal direction, respectively, and these are integrally assembled. Is one block, and these are connected by 16 blocks. As specific dimensions, for example, the length of one side of the float element 21 is 500 mm, the width of one block including 40 float elements 21, 21,... Is 2000 mm, and the length is 5000 mm. ing.
Therefore, the overall length of the float 2 is 80 m. The size of the float element 21 and the width and length of the float 2 are not limited to these, and can be designed to any dimensions.

<Description of Wave Canceling Section 3> Next, the wave canceling section 3 will be described. The wave-eliminating section 3 includes a plurality of flexible wave-eliminating sheets 31, 32, and 33. Specifically, a pair of hanging sheets 31, 32 which are hung from the float 2 and are arranged opposite to the width direction of the float 2 (wave propagation direction), and a substantially vertical direction of the two hanging sheets 31, 32. And a horizontal sheet 33 connecting the central portions and extending in the horizontal direction. These sheets 31, 32,
Reference numeral 33 denotes a water-permeable sheet made of, for example, polyester (for example, a mesh of polyester fiber mesh # 800).

As shown in FIG. 7, each of the hanging sheets 31, 3
At the upper end of the 2, the main hanging sheets 31, 32 are float 2
Are sewn together. This locking belt 34 is hooked on the connecting pieces 27A to 27D of the float element 21 (FIG. 6).
), The hanging sheets 31, 32 hang down from the float 2. That is, each connecting piece 2 before driving the peg 4
At the time of superposition of 7A-27D, these connecting pieces 27A-
The locking belt 34 is hooked on 27D, and then the pegs 4 are driven in, so that the locking belt 34 can be reliably hooked on the connecting pieces 27A to 27D. Specifically, as shown in FIG. 2, the hanging positions of the hanging sheets 31 and 32 are two of the four floating elements 21, 21,... Arranged in the width direction of the float 2 on the center side. It is hung from both outer sides of the float elements 21 and 21. The length of the hanging sheets 31 and 32 in the horizontal direction is equal to the length of one block of the float 2 (5000 mm in the above-described case). That is, these hanging sheets 31 and 32 are provided independently for each block of the float 2.

The hanging positions of the hanging sheets 31 and 32 and the length in the horizontal direction are not limited to these, and can be arbitrarily designed.

Further, as shown in FIG.
Is sewn to each of the hanging sheets 31 and 32. Specifically, the width direction dimension of the horizontal sheet 33 is
The horizontal sheet 33 is bent slightly upward at both outer ends in the width direction, and the bent portions 33a, 33a are attached to the hanging sheets 31, 32, respectively. Each is sutured. As a result, a region K surrounded by the hanging sheets 31, 32, the horizontal sheet 33, and the lower surface of the float 2 is formed as a space in which only the longitudinal direction of the float 2 is open. This space is the water retention area K in the present invention.

The weights 35, 35,... Are attached to the lower ends of the hanging sheets 31, 32, respectively. This weight 3
Reference numerals 5 are arranged at a plurality of locations at predetermined intervals in the horizontal direction of the hanging sheets 31 and 32. The weight 35 has a pair of weight members 35A, 3 having a bolt hole 35a formed in the center.
5B, as shown in FIG.
32, the bolt holes 35a are aligned with the bolt holes 35a, and the weight members 35A, 35B are overlapped with each other so as to sandwich the hanging sheets 31, 32. The bolt 36 is inserted, the nut 37 is attached from the other side, and the hanging sheet 3
1, 32. Thereby, the posture of each of the hanging sheets 31, 32 is maintained so as to extend in the vertical direction, and the water retention space K can be maintained as a substantially rectangular parallelepiped space.

<Description of Other Configurations> Further, columns 5 for fixing the position of the float 2 are provided at the installation position of the wave absorber 1. The struts 5, 5 are made of, for example, FRP, and have lower ends that are driven into the seabed by a predetermined dimension and extend vertically, as shown in FIG. 2, and upper ends that have openings 28 of the connecting piece 27 of the float element 21. Has been inserted. The outer diameter of the column 5 is the opening 28 of the connecting piece 27.
Is set slightly smaller than the inner diameter dimension of. For this reason, the float 2 is supported by the column 5 in a state where only the movement in the vertical direction is allowed. That is, when the sea level changes due to ebb and flow, the float 2 can move in the vertical direction following the change.

-Description of operation of wave canceling device 1- Next, the wave canceling operation of the wave canceling device 1 configured as described above will be described.

When the wave breaking device 1 is installed in the ship mooring facility M as described above, the water in the installation water area flows into the water holding area K, and the water holding area K is filled with water. Become. That is, the wave absorber 1 is provided in the water retaining area K.
It was installed in the water area with the water held. In other words, the water held in the water retaining area K becomes the added weight of the wave absorber 1, and the apparent weight of the entire wave absorber 1 is equal to the weight of the float 2 and the wave absorber 3, and the apparent weight of the water absorber K. It is the sum of the weight of the water held.

In this state, as shown in FIG. 9A, when wind waves, sailing waves, and reflected waves propagate from the open sea S to the ship mooring facility M (see arrows in the figure), This wave collides with the float 2 and the wave absorber 3. Most of the impact force of this wave is received by the wave canceling unit 3. Then, at this time, the impact force of the wave is received by the water held in the water retaining area K, and the wave is attenuated. Further, since the apparent weight of the entire wave absorber 1 is increased by the water held in the water retaining area K, the inertia force of the wave absorber 1 is increased. For this reason, the wave absorber 1 does not easily move up and down due to the influence of the wave, but receives the impact force of the wave due to its inertial force and attenuates the wave. Furthermore, weights 35, 35,
Are attached, the hanging sheets 31, 3
2 is maintained so as to extend in the vertical direction, and the lower half portions of the hanging sheets 31 and 32 receive the shock of the waves and attenuate the waves. Thus, the wave absorber 1
Most of the waves that collide with are attenuated. Then, only the wave propagating to the ship mooring facility M goes under the hanging sheets 31 and 32, and most of the wave is attenuated by the wave canceling device 1. Therefore, the ship mooring facility M
Almost no waves propagating to the shore, restraining the movement of the moored ship B (boat or yacht), avoiding collision between the ships B, B and contact with the quay of the ship B to avoid damage can do.

FIGS. 9B and 9C show the state of the wave absorber 1 when the water depth of the ship mooring facility M becomes shallow at low tide or the like. Hanging sheets 31, 32
Is flexible, so as shown in these figures, it is easily deformed according to the water depth, and the floating state of the float 2 can be maintained while sufficiently securing the volume of the water retaining area K. . Therefore, the waves can be attenuated in the same manner as described above, regardless of the change in the water depth.

-Effects of Embodiment- As described above, according to the wave absorber 1 of the present embodiment, the water retaining area K is formed in the wave absorber 3 and the water of the installation water area is retained in the water retaining area K. As a result, the inertia force of the wave canceling device 1 is increased. For this reason, the impact force of a wave can be received and a wave can be attenuated reliably. As a result, the moored ship B
Of the ship B, collision of the ships B and B and contact of the ship B with the quay can be avoided to avoid the damage, and the embarkation, disembarkation, and unloading of cargo between the quay and the ship B can be performed. Work can be performed easily. In particular, it is possible to effectively cancel a wave having a short wavelength in a relatively short period such as a sailing wave.

The present wave absorber 1 can also be used as a floating pier. In this case, as described above,
Since the inertia force of the wave absorber 1 is large and does not easily move up and down under the influence of waves, it is possible to easily carry on and off the boat between the floating pier and the ship.

Further, since the wave-absorbing section 3 has water permeability, water can flow between the mooring facility M and the open sea S through the wave-absorbing section 3. For this reason, it is possible to replace the water in the ship mooring facility M, and it is possible to avoid that the water becomes dead water and the water quality is deteriorated.

The horizontal sheet 33 has both outer ends slightly bent upward, and the bent portions 33a, 33a
a is sewn to each of the hanging sheets 31 and 32. The reason is described below. When a wave collides with the wave absorber 1, a force that moves upward acts on the wave absorber 1 due to the influence of the wave. At this time, a downward force acts on the horizontal sheet 33 by the water in the water retaining area K. When both outer ends of the horizontal sheet 33 are bent downward and sewn to the hanging sheets 31 and 32, this force acts in a direction in which the sewn portion is peeled off, and the sewn portion is easily broken. there is a possibility. In this embodiment, the horizontal sheet 3
3 is bent slightly upward to form a hanging sheet 3
Since the stitches 1 and 32 are sewn to each other, breakage of the stitched portion can be suppressed, and the durability of the wave breaking device 1 can be improved.

-Other Embodiments- In the above-described embodiment, the weights 35, 35, ... are attached to the lower ends of the respective hanging sheets 31, 32. The present invention is not limited to this, and as shown in FIG.
A chain 38 may be attached to the lower end of the seat 32 so as to maintain the posture of the hanging sheets 31 and 32 so as to extend in the vertical direction.

Further, each of the sheets 31 constituting the wave canceling section 3,
32 and 33 do not necessarily need to have water permeability. For example, all the sheets 31, 32, 33 are made to be impermeable, or the hanging sheets 31, 32 are made to be permeable,
Various configurations such as making the horizontal sheet 33 impermeable can be adopted.

The arrangement state of the float elements 21, 21,... Is not limited to the above-described one, but may be five in the width direction of the float 2.
One or more float elements 21, 21,... Are arranged, and one or more float elements 21, 21,. Things and the like can be adopted.

Further, the structure of the wave-absorbing section 3 is not limited to the above-described one, and various structures such as a structure in which a plurality of water retaining areas K are formed in a wave propagation direction and a structure in which a plurality of water retaining areas K are formed in a vertical direction. Can be adopted.

[0044]

As described above, according to the present invention, the following effects are exhibited.

According to the first aspect of the present invention, the wave-damping device including the float and the wave-damping portion suspended from the float is provided with a wave-damping device such that a water-retaining area is formed by a flexible sheet material. When the water-absorbing device is installed in the installation water area, water flows into this water-holding area, giving additional weight to the wave-absorbing device and increasing the inertia force, thereby improving the wave-absorbing performance I try to make it. For this reason, it is possible to suppress the motion of the moored ship, avoid collision between the ships and contact with the quay of the marine vessel, thereby avoiding the damage. Loading and unloading work can be performed easily. In particular, it is possible to effectively cancel a wave having a short wavelength in a relatively short period such as a sailing wave. Before installation in the installation water area, since water does not exist in the water holding area, the overall weight of the wave absorber is relatively light, so that the installation work of the wave absorber can be facilitated and the manufacturing cost can be reduced. In addition, the installation work cost can be reduced. Furthermore, since the wave-elimination part is formed of a flexible sheet, it easily deforms according to the water depth,
Irrespective of a change in water depth, a high wave-breaking performance can be stably exhibited, and a highly reliable wave-breaking device can be provided.

According to the second aspect of the present invention, the water retaining area is formed by providing the wave-eliminating section with a pair of hanging sheets and a horizontal sheet. For this reason, while having a relatively simple configuration of the wave canceling device, it is possible to exhibit high wave canceling performance as described above, and it is possible to achieve both a reduction in manufacturing cost of the entire wave canceling device and an improvement in wave canceling performance. .

According to the third aspect of the present invention, by attaching a weight to the lower end of each hanging sheet, the posture of each hanging sheet is maintained so as to extend in the vertical direction. For this reason, it is possible to sufficiently secure the volume of the water retention area, to reliably provide a sufficient additional weight to the wave canceling device, and to reliably improve the wave breaking performance described above. it can.

According to the fourth aspect of the present invention, a float is constituted by combining a plurality of float elements which are arranged along the water surface and are detachable from each other. Therefore, the shape of the float can be arbitrarily set depending on the combination of the float elements, and the versatility of the wave absorber can be expanded, for example, by using the wave absorber as a floating pier. Performance can be improved.

According to the fifth aspect of the present invention, the hanging sheet is
It is arranged over a plurality of float elements. For this reason,
The area for receiving the waves can be increased, and the wave breaking performance can be further improved.

According to the sixth aspect of the present invention, the float is supported by the column which is driven into the water bottom and extends in the vertical direction while permitting only the vertical movement. For this reason, it is possible to prevent the float from moving in the direction in which the water surface extends, and it is possible to reliably receive the impact of the wave by the entire wave-dissipating device, thereby further improving the wave-dissipating performance. .

[Brief description of the drawings]

FIG. 1 is a plan view around a ship mooring facility in which a wave absorber according to an embodiment is installed.

FIG. 2 is a perspective view showing an installed state of the wave absorber.

FIG. 3 is a plan view showing an installed state of the wave canceling device.

FIG. 4 is a plan view in which a part of the float element is broken.

FIG. 5 is a sectional view taken along line VV in FIG. 4;

FIG. 6 is a cross-sectional view showing a connection portion between float elements.

FIG. 7 is a diagram illustrating an upper end portion of a hanging sheet.

FIG. 8 is a cross-sectional view showing a mounting portion of a weight.

FIG. 9 is a diagram for explaining the wave-breaking operation of the wave-breaking device.

FIG. 10 is a diagram corresponding to FIG. 2 in a modified example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Wave canceler 2 Float 21 Float element 3 Wave elimination part 31, 32 Hanging sheet (wave elimination sheet) 33 Horizontal sheet (wave elimination sheet) 35 Weight 5 Prop K Water retention area

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Akio Higashi 1-32 Chaya-cho, Kita-ku, Osaka-shi F-term in Yanmar Diesel Co., Ltd. 2D018 BA25

Claims (6)

[Claims] 1. A float floating on a water surface, and a wave-breaking part suspended from the float, wherein the wave-breaking part is formed of a wave-breaking sheet having flexibility, and is provided with water in an installation water area. A wave absorber which allows an inflow and forms a water holding area surrounded on both sides and a lower side in a wave propagation direction. 2. The wave-absorbing device according to claim 1, wherein the wave-absorptive section is suspended from the float and connects a pair of hanging sheets arranged in a wave propagation direction to face each other. And a horizontal sheet extending in a horizontal direction, wherein a region surrounded by the hanging sheet, the horizontal sheet, and the lower surface of the float is a water retaining area. 3. The wave absorber according to claim 2, wherein a weight is attached to a lower end of each hanging sheet. 4. The wave absorber according to claim 2, wherein the float is configured by combining a plurality of float elements arranged along a water surface and detachable from each other. A wave absorber characterized by the above-mentioned. 5. The wave absorber according to claim 4, wherein the hanging sheet is constituted by one sheet material arranged over a plurality of float elements. 6. The wave absorber according to any one of claims 1 to 5, wherein the float is supported by being vertically driven by a strut that is driven into the water bottom and extends in a vertical direction. A wave absorber.