Floating wave-dissipating device

Abstract

To provide a floating wave-dissipating device which is structured to attenuate waves as much as possible, to suppress rocking as much as possible, and to prevent racing boats from being damaged as much as possible even if they collide with the same, especially when installed at a boat racing venue.SOLUTION: Waves coming from a home stretch come into contact with an outer tube 5, are attenuated as they pass through a mesh, and the waves that pass through and enter the outer tube 5 come into contact with a bundle of inner tubes 6 and are significantly attenuated as they pass through meshes of multiple inner tubes 6. At this time, the waves are further attenuated as they pass through the mesh of one of the transmitted wave attenuation members 18A, and waves that pass through the mesh of one of the transmitted wave attenuation members 18A and enter the inner tube 6C, especially from the front side, leave the inner tube 6C, pass through the mesh on the back side, and are attenuated and transmitted as they pass through the mesh of the other transmitted wave attenuation member 18B, and are attenuated and transmitted by peripheral surfaces on back stretch sides of the inner tube 6 and outer tube 5 where the float members 9 are not provided, and move out of a floating wave-dissipating device 1.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a floating wave-dissipating device that can be installed in a boat racing venue, a swimming pool, a riverbank, a lake, a reservoir, the sea, etc. , that is, a floating wave-dissipating device used to attenuate waves at boat racing venues, etc. Regarding. [Background technology]

[0002] Conventionally, floating wave dissipating devices installed at motorboat racing venues and the like are disclosed, for example, in Patent Document 1. This floating wave dissipating device has an outer tube made of a mesh material, which houses multiple inner tubes also made of a mesh material. A structure has been proposed in which waves generated by racing boats are attenuated by passing through the outer tube, and are further attenuated by passing through the multiple inner tubes (see Patent Documents 1 and 2). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2001-164536 [Patent Document 2] Japanese Patent Application Laid-Open No. 2004-51051 Summary of the Invention [Problem to be solved by the invention]

[0004] However, because the water surface is not shielded, it is thought that waves that are not fully attenuated pass through to the other side as transmitted waves, and because this floating wave dissipating device is a buoyant body, it is thought that transmitted waves are generated by the device's rocking motion due to its structure.As mentioned above, even though the device attenuates waves, the attenuation is still not sufficient.

[0005] Therefore, the present invention aims to provide a floating wave dissipating device that has a structure that can attenuate waves as much as possible, minimizes rocking, and, particularly when installed at a boat racing venue, minimizes damage to racing boats in the event of a collision. [Means for solving the problem]

[0006] Therefore, the first The invention is a floating wave dissipating device used to attenuate waves at a boat racing venue, etc. an outer tube made of a mesh material that attenuates waves by allowing them to pass through the mesh; It is composed of a reticulated The outer cylinder A plurality of inner tubes that attenuate the waves that have passed through the mesh by passing them through their own meshes. a group of inner cylinders each of which is housed in a bundle in the outer cylinder; a plurality of rod-shaped float members inserted into the inner cylinder; Along the longitudinal direction of the outer cylinder a plurality of floats arranged alternately with the bundle of inner cylinders in the outer cylinder; a pair of end covers each having a bottomed hollow cylindrical shape and each having an opening into which an end of the outer cylinder is fitted when the plurality of inner cylinders and the floats are housed inside, and the other end cover is closed; The device is made up of a mesh body and attenuates waves that have passed through the mesh of the outer tube and the inner tube by passing them through its own mesh, and is provided inside the outer tube. In a cross section perpendicular to the longitudinal direction of the outer cylinder, the water surface of the boat racing venue, etc. When the parallel rows are considered as rows, they are arranged in the same row. Regarding one of the inner cylinders and the other inner cylinder, and the inner cylinder located above between the two of the one inner cylinder and the other inner cylinder arranged side by side, One of the inner cylinders The aforementioned The inner cylinder located above The aforementioned The other inner cylinder Above The inner cylinder is fixed by a plurality of fixing members in a state in which the inner cylinder is positioned on the outer side, and the The water surface The angle formed by The wave first passes through one of the obtuse angles, and after passing through the other, the wave passes through the other at an acute angle. The present invention is characterized by comprising a pair of V-shaped transmitted wave attenuation members.

[0007] Second The invention is a floating wave dissipating device used to attenuate waves at a boat racing venue, etc. an outer tube made of a mesh material that attenuates waves by allowing them to pass through the mesh; It is composed of a reticulated The outer cylinder A plurality of inner tubes that attenuate the waves that have passed through the mesh by passing them through their own meshes. a group of inner cylinders each of which is housed in a bundle in the outer cylinder; a plurality of rod-shaped float members inserted into the inner cylinder; Along the longitudinal direction of the outer cylinder a plurality of floats arranged alternately with the bundle of inner cylinders in the outer cylinder; a pair of end covers each having a bottomed hollow cylindrical shape and each having an opening into which an end of the outer cylinder is fitted when the plurality of inner cylinders and the floats are housed inside, and the other end cover is closed; The device is made up of a mesh body and attenuates waves that have passed through the mesh of the outer tube and the inner tube by passing them through its own mesh, and is provided inside the outer tube. In a cross section perpendicular to the longitudinal direction of the outer cylinder, the water surface of the boat racing venue, etc. When the parallel arrangement is defined as a row, one of the inner cylinders is placed on top of two of the inner cylinders that are arranged side by side in the same row, and one of the inner cylinders is placed on top of the other. The juxtaposed a surface portion of one of the two inner cylinders; Preceding position The surface of the inner cylinder is The juxtaposed The inner cylinders are fixed by a plurality of fixing members in a state in which the fixing members are respectively straddling the surface portion of the other of the two inner cylinders and the surface portion of the inner cylinder placed above from the outside, and are respectively The water surface The angle formed by The wave first passes through one of the obtuse angles, and after passing through the other, the wave passes through the other at an acute angle. The present invention is characterized by comprising a pair of V-shaped transmitted wave attenuation members.

[0008] Third The invention is a floating wave dissipating device used to attenuate waves at a boat racing venue, etc. an outer tube made of a mesh material that attenuates waves by allowing them to pass through the mesh; It is composed of a reticulated The outer cylinder A plurality of inner tubes that attenuate the waves that have passed through the mesh by passing them through their own meshes. a group of inner cylinders each of which is housed in a bundle in the outer cylinder; a plurality of rod-shaped float members inserted into the inner cylinder; Along the longitudinal direction of the outer cylinder a plurality of floats arranged alternately with the bundle of inner cylinders in the outer cylinder; a pair of end covers each having a bottomed hollow cylindrical shape and each having an opening into which an end of the outer cylinder is fitted when the plurality of inner cylinders and the floats are housed inside, and the other end cover is closed; It is composed of a mesh body and attenuates waves that have passed through the mesh of the outer tube and the inner tube by passing them through its own mesh, In a cross-sectional view perpendicular to the longitudinal direction of the outer cylinder, the angle formed with the water surface on each side of the incoming waves at the boat racing course or the like is an obtuse angle on one slope through which the waves first pass, and an acute angle on the other slope through which the waves pass after passing through the first slope, and the bottom surface is parallel to the water surface. It has a roughly triangular shape, The water surface of the boat racing course, etc. and a transmitted wave attenuation member enclosing the inner cylinder in a plurality of rows, each row being parallel to the other. [Effects of the Invention]

[0009] According to the present invention, it is possible to provide a floating wave dissipating device that is structured to attenuate waves as much as possible, minimizes rocking, and, particularly when installed at a boat racing track, minimizes damage to racing boats in the event of a collision. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a schematic plan view of a boat racing venue showing a floating wave dissipating device installed at the venue. FIG. [Figure 2] This is a front view of a floating wave dissipating device in which area AA shows nothing broken, area BB shows the outer tube broken, area CC shows the outer tube and part of the inner tube broken, and area DD shows the outer tube broken. [Figure 3] FIG. 2 is an exploded view of the floating wave dissipating device. [Figure 4] FIG. 2 is a longitudinal cross-sectional side view of the floating wave dissipating device taken in a direction perpendicular to the longitudinal direction of the outer cylinder at the position where the inner cylinder group is stored. [Figure 5] FIG. 2 is a partially cutaway front view of one end of a floating wave dissipating device. [Figure 6] FIG. 1 is a front view of one end of a floating wave dissipating device connected to a turn mark. [Figure 7] FIG. 1 is a front view of one end of a floating wave dissipating device connected to a tight-turn prevention buoy. [Figure 8] FIG. [Figure 9] FIG. 2 is a side view of a floating wave dissipating device. [Figure 10] This shows another embodiment of a transmitted wave attenuation member, and is a vertical cross-sectional side view of a floating wave dissipating device taken in a direction perpendicular to the longitudinal direction of the outer cylinder at a position where the inner cylinder group is stored. DETAILED DESCRIPTION OF THE INVENTION

[0011] Below, with reference to the attached drawings, a detailed description will be given of a preferred embodiment in which the floating wave dissipating device 1 according to the present invention is installed in a boat racing venue (boat racing venue) KB, for example, although it may be installed in a boat racing venue, a swimming pool, a riverbank, a lake, a reservoir, the sea, etc.

[0012] In Figure 1, the race boat RB In Two floating wave dissipating devices 1, each with a wave-dissipating function that attenuates wake waves generated by the racing boat RB, are installed at a predetermined distance from each other on the racing boat KB. That is, the two floating wave dissipating devices 1 are installed floating on the racing boat KB so as to be perpendicular to the direction of travel of waves generated by the racing boat RB. 2 is a roughly conical turn mark surrounded by alternating warning colors of red and white horizontally, and is connected in a floating state to one end of the floating wave dissipating devices 1. In addition, in Figure 1, a spherical maneuver prevention buoy 3, which prevents the racing boat KB from turning sharply, is connected in a floating state to the end of the left floating wave dissipating device 1, but is not connected to the end of the right floating wave dissipating device 1.

[0013] In a boat race, when the raceboat RB leaves the pit PT and passes through the start line SL and the home stretch (the side closer to the front stand ST, with the two turn marks 2A and 2B as its axis), the first turn mark 2A is set up in a position visible to the right from the stand ST. Also, when the raceboat RB turns around the first turn mark 2A and passes through the back stretch (the side opposite the front stand ST, with the two turn marks 2A and 2B as its axis), the second turn mark 2B is set up in a position visible to the left from the stand ST. In this case, the first turn mark 2A and the second turn mark 2B are set up so that they face each other with a gap of 300 m on the racing water surface, and both turn marks 2A and 2B are positioned outward.

[0014] Next, in FIG. 2 and FIG. 3, each floating wave dissipating device 1 mainly comprises an outer cylinder 5 and a plurality of inner cylinders 6 housed in the outer cylinder 5, which attenuate waves that have passed through the mesh of the outer cylinder 5 (same as "passing through"; the same applies below). A group of inner cylinders 6 are housed in a bundle in the outer cylinder 5, and a group of inner cylinders 6 are housed in a bundle in the longitudinal direction of the outer cylinder 5. A plurality of floats 7 housed in the outer cylinder 5, and a plurality of Inner cylinder 6 groups and an end cover 8 having a bottomed hollow cylindrical shape (having a hollow cylindrical portion 8A and a spherical retaining portion 8B) with openings into which the ends of the outer cylinder 5 are fitted when the float 7 is housed inside, and the other side is closed. For example, the float 7 is disposed inside the outer cylinder 5 at both ends of this floating wave dissipating device 1, and Both ends Between the floats of 7 four The group of inner cylinders 6 and three floats 7 are arranged. That is, five floats 7 and four groups of inner cylinders 6 are arranged in the outer cylinder 5. The outer cylinder 5 They are arranged alternately along the longitudinal direction. The floating wave dissipating device 1 will be described in detail below.

[0015] First, the outer cylinder 5 is a porous cylinder having a length of about 20 m and an inner diameter of, for example, about 60 cm, and is a cylindrical body of a mesh, net, or other reticulated material having a required thickness. In a cross section perpendicular to the longitudinal direction of the outer cylinder 5, When the rows are parallel to the water surface WL, 6 rows up and down The 27 inner cylinders 6 are housed in such a manner that their longitudinal direction is parallel to the longitudinal direction of the outer cylinders 5. (See Figure 4.) The inner cylinder 6 is a porous cylinder having a length of about 4 m and an outer diameter of, for example, about 10 cm, and is a mesh-like cylinder made of a mesh or net having a required thickness.

[0016] The mesh size of the outer tube 5 of the mesh body is made smaller than the mesh size of the inner tube 6 of the mesh body. In other words, the mesh size of the outer tube 5 is smaller than the mesh size of the inner tube 6. This provides an even better wave-damping effect (wave-damping effect).

[0017] Both the outer tube 5 and the inner tube 6 are stretchable and elastic, and the bundle of inner tubes 6 functions as a core material, so the floating wave dissipating device 1 as a whole maintains sufficient strength while exhibiting a high shock-absorbing function. This provides a high level of safety (preventing damage to the racing boat RB and preventing injuries to participating racers, etc.) in the event that the racing boat RB collides with the floating wave dissipating device 1. In addition, floating matter such as debris is less likely to pass through the mesh of the outer tube 5 and enter the outer tube 5, which allows a high wave-dissipating effect to be maintained.

[0018] In particular, when the open area (opening area) of one mesh of the outer cylinder 5 is S1 and the open area (opening area) of one mesh of the inner cylinder 6 is S2, the open area ratio S1 / S2 is preferably about 0.05 to 0.9, more preferably about 0.08 to 0.75, and even more preferably about 0.15 to 0.65. When the open area ratio is within this range, the above-mentioned effects, particularly the effect of attenuating waves and the effect of making it difficult for floating matter to enter the outer cylinder 5, are more significantly exhibited.

[0019] The opening area S1 of one mesh of the outer cylinder 5 is not particularly limited, but is preferably 0.8 cm 2 More than ~40cm 2 It is preferable that the thickness is about 1.6 cm or less. 2 More than ~30cm 2 It is more preferable that it is about 2.8 cm or less. 2 More than ~25cm 2 It is more preferable that the opening area S1 is about 1 / 2 or less. If the opening area S1 is too large, the effect of preventing the intrusion of loose objects will be reduced, and if the opening area S1 is too small, the wave-damping effect may be reduced if the opening rate is low. Although both ends of the outer cylinder 5 are not closed in order to prevent the intrusion of debris and the like into the outer cylinder 5, they may be closed. If closed, the outer cylinder 5 will also exhibit a wave-damping effect at the end faces of both ends.

[0020] The aperture ratio (opening ratio) of the mesh of the outer cylinder 5 is not particularly limited, but is preferably about 40% to 93%, more preferably about 50% to 90%, and even more preferably about 55% to 80%. If the aperture ratio is too small, the wave-damping effect decreases, and if the aperture ratio is too large, the strength decreases and the cushioning effect decreases.

[0021] The opening area S2 of one mesh of the mesh-like inner cylinder 6 is not particularly limited, but is preferably 1.2 cm 2 More than ~64cm 2 It is preferable that it is about 2cm or less. 2 More than ~50cm 2 It is more preferable that it is about 3.5cm or less. 2 More than ~38cm 2 It is more preferable that the open hole area S2 is about 100% or less. When the open hole area S2 is in this range, a particularly excellent wave-damping effect is exhibited.

[0022] The aperture ratio (opening ratio) of the mesh of the inner tube 6 is not particularly limited, but is preferably about 35% to 91%, more preferably about 44% to 85%, and even more preferably about 50% to 75%. If the aperture ratio of the inner tube 6 is too small, the wave-damping effect decreases, and if the aperture ratio is too large, the strength of the inner tube 6 decreases and the cushioning effect decreases when the outer diameter of the inner tube 6 is large, for example.

[0023] The mesh shape of the outer cylinder 5 and the mesh shape of the inner cylinder 6 may be the same or different, but it is preferable that these mesh shapes are different in order to improve the wave-dissipating effect. For example, in this embodiment, the mesh shape of the outer cylinder 5 is approximately hexagonal (regular hexagon or other hexagon), and the mesh shape of the inner cylinder 6 is approximately quadrangular (square, rectangle, rhombus, parallelogram, etc.). Furthermore, these mesh shapes may be a combination of a polygon and a circle, a polygon and an ellipse, a circle and an ellipse, or a combination of non-similar quadrangles or hexagons, and the combination of the two mesh shapes is not limited to these.

[0024] The outer tube 5 and the inner tube 6 are preferably made of a synthetic resin material, which is free from rust and corrosion problems, lightweight, has moderate buoyancy, is easy to handle and durable, and when formed into a cylindrical mesh material, has the ability to recover from deformation, thereby providing excellent cushioning function.

[0025] That is, examples of synthetic resin materials constituting the outer cylinder 5 and the inner cylinder 6 include polyolefins such as polyethylene and polypropylene, polyesters such as polyethylene terephthalate, polyvinyl chloride, polyamide, polytetrafluoroethylene, polystyrene, copolymers containing at least one of these, polymer blends, etc. The constituent materials of the outer cylinder 5 and the inner cylinder 6 do not necessarily have to be the same.

[0026] In the outer tube 5 and the inner tube 6 made of such a synthetic resin material, it is preferable that the intersecting portions of the frames that make up the mesh are fixed or integrated by melting, which prevents the mesh from collapsing, improves durability, and provides excellent resilience against deformation, resulting in excellent impact resistance and a high cushioning function.

[0027] The diameters of the outer cylinder 5 and the inner cylinder 6 are not particularly limited, but when the inner diameter of the outer cylinder 5 is D1 and the outer diameter of the inner cylinder 6 is D2, the outer diameter ratio D2 / D1 is preferably about 0.01 to 0.5, more preferably about 0.04 to 0.39, and even more preferably about 0.06 to 0.34. If this outer diameter ratio is too small, it becomes difficult to set the S1 / S2 within an appropriate range, and if this outer diameter ratio is too large, the number of inner cylinders 6 inserted into the outer cylinder 5 will decrease, which may result in less improvement in the wave-damping effect.

[0028] In this embodiment, the outer cylinder 5 and the inner cylinder 6 are substantially cylindrical, but the cross-sectional shapes of the outer cylinder 5 and the inner cylinder 6 may be polygonal (e.g., square, hexagonal, octagonal), elliptical, semicircular, or other shapes other than circular. Also, a plurality of inner cylinders with different diameters (dimensions), shapes, mesh sizes, and porosity rates may be inserted into the outer cylinder 5.

[0029] Inside the inner cylinder 6, which is a part of the outer cylinder 5, specifically inside the inner cylinder 6 located in the lower half of the outer cylinder 5, a round rod-shaped float member 9 made of, for example, foamed polyethylene is inserted with a desired gap (see Figures 4 and 5). By increasing or decreasing the number of float members 9, i.e., the number of inner cylinders 6 into which the float members 9 are inserted, the buoyancy of the floating wave dissipating device 1 can be adjusted appropriately.

[0030] The group of inner cylinders 6 is bound together at multiple locations by ropes 10 made of, for example, vinylon or polyethylene, which hold the shape stable (see FIG. 2). In this case, the distance between adjacent ropes 10 is, for example, about 0.8 m. Note that the method for bundling the group of inner cylinders 6 is not limited to ropes, and they may be bound by other means.

[0031] In addition, five stainless steel mooring bands 11 corresponding to the number of floats 7 are wound around the outer periphery of the outer tube 5 corresponding to each float 7 to secure the floating wave dissipating device 1 (see Figure 2).

[0032] If a large portion of the floating wave dissipating device 1 is submerged below the water surface WL, the buffering effect when the racing boat RB collides with the floating wave dissipating device 1 will be reduced. Conversely, if a large portion is exposed above the water surface WL, the buffering effect when the racing boat RB collides with the floating wave dissipating device 1 will be increased. Therefore, by storing the float member 9 inside the inner tube 6 in this way, the floating wave dissipating device 1 has a wave-dissipating effect and a buffering effect, and the buoyancy of the floating wave dissipating device 1 is adjusted.

[0033] In this embodiment, each of the inner cylinders 6 is In a cross section perpendicular to the longitudinal direction of the outer cylinder 5, the rows parallel to the water surface WL of the boat racing track KB areSix rows are arranged, but the top three rows in the outer cylinder 5 The inner cylinder 6 The float member 9 is not inserted and stored in the outer cylinder 5, but is inserted into the group of inner cylinders 6 arranged in three rows at the bottom, located in the lower half of the outer cylinder 5, except for some of the inner cylinders 6.

[0034] The float members 9 are not inserted into the inner cylinders 6 located immediately inside both ends of the group of inner cylinders 6 located at the top of the three lower rows (the second inner cylinders 6 from the left and right in Figure 4), but cylindrical shape retainers 14 made of a synthetic resin material such as hard polyvinyl chloride are inserted into them to prevent bending or twisting of the outer cylinder 5 during assembly of the floating wave dissipating device 1 and to maintain the shape of the outer cylinder. With this configuration, the group of inner cylinders 6 with the float members 9 inserted functions as a core material, and similarly, the group of inner cylinders with the shape retaining members 14 inserted also functions as a core material, allowing the shape of the outer cylinder 5 and, ultimately, the shape of the floating wave dissipating device 1 to be firmly maintained.

[0035] The float 7 is made by placing a cylindrical piece of polystyrene foam or urethane foam of a desired size into a bag-shaped drawstring bag made of a synthetic resin material such as polyethylene or polyvinyl chloride, and closing the open end, and the outer diameter of this float 7 is approximately the same as but slightly smaller than the inner diameter of the end cover 8. This allows the surface of the polystyrene foam to be protected by the drawstring bag, and, as described above, the buoyancy of the floating wave dissipating device 1 can be adjusted appropriately, just like the float members 9 inserted inside each of the inner cylinders 6.

[0036] Then, both ends of the outer tube 6 are fixed to the end covers 8 with fixing members 13 such as cable ties or wires, with the outer tube 5 fitted into the end covers made of, for example, fiber reinforced plastic (FRP). That is, the fixing members 13 are inserted into the multiple mounting holes 12 opened in the hollow cylindrical portion 8A of the end cover 8 and into the openings of the mesh of the outer tube 5 so as not to come out, and the ends of the outer tube 5 and the end covers 8 are fixed together, thereby integrating the outer tube 5 and both end covers 8.

[0037] As shown in FIG. 4, the outer cylinder 5 accommodates In each of the six inner cylinder groups, The inner cylinder 6 and the float 7 located in the central portion of the inner cylinder 6 in the third row from the top in the outer cylinder 5 are The outer cylinder 5 In order to maintain the shape of the four inner cylinders 6 and five inner cylinders 6, a steel wire rope 15 having a diameter of about 9 mm is inserted through the four inner cylinders 6 and five Float 7 Both ends of the wire rope 15 are pulled out approximately 1.2 m through an opening 8D formed in a recess 8C in the center of the retaining portion 8B of each end cover 8.

[0038] As mentioned above, the inner cylinder 6 group and Each of the floats 7 The wire rope 15 drawn out from each of the floats 7 at both ends of the outer tube 5 is folded back with a circular (round) attachment portion 15A formed at the folded back end, and as shown in FIG. 5, wire clips 16 are attached to the neck portion, the folded back middle portion, and the drawn-out root portion of the attachment portion 15A of the wire rope 15, respectively, and the inner tubes 6 and Each of the floats 7 The outer tube 5 is fixed so that the tight contact with the outer tube 5 is not released and so that the fitting between both ends of the outer tube 5 and each end cover 8 is not released. Note that, although Fig. 5 shows only one end of the wire rope 15 pulled outward from one of the end covers 8, the other end of the wire rope 15 pulled outward from the other end cover 8 is similar, and therefore a description thereof will be omitted here.

[0039] In addition, the float member 9 In a cross section perpendicular to the longitudinal direction of the outer cylinder 5, the rows parallel to the water surface WL of the boat racing track KB are arranged in a row Among the plurality of inner cylinders 6 The inner tube 6 into which the float member 9 is inserted and the inner tube 6 into which the shape-retaining body 14 is inserted function as a core material (increasing strength), and even when the floating wave dissipating device 1 is hit by waves, this prevents bending and twisting of the floating wave dissipating device 1, thereby demonstrating an excellent wave-dissipating effect.

[0040] It is also possible to store the float member 9 directly in the outer tube 5 (without inserting it into the inner tube 6) and bundle it together with the inner tube 6, but by inserting it into the inner tube 6, space efficiency is improved and more inner tubes 6 can be stored in the outer tube 5 in the same space, which contributes to improving the wave-breaking effect.

[0041] The float member 9 may be made of any material that can provide buoyancy, including, for example, foams such as polyethylene foam, polystyrene foam, and polyurethane foam. The float member 9 is not limited to a rod shape and may be hollow. The rod-shaped float member 9 has a circular cross section (round bar), but is not limited to this shape. Multiple float members 9 may be inserted into a single inner tube 6. The length of each float member 9 is generally the same as the length of the inner tube 6 into which it is inserted, but may be slightly shorter. Multiple short float members 9 may be connected and inserted into the inner tube 6.

[0042] The floating wave dissipating device 1 configured as described above exhibits excellent wave-dissipating effects for all types of waves under all conditions, but is particularly suited to attenuating the special waves generated by the racing boat RB, which travels at high speeds (e.g., about 85 km / h), i.e., waves with wavelengths of about 0.8 m to 5 m (especially about 1 m to 3.5 m) and amplitudes (wave heights) of about 10 mm to 150 mm (especially about 20 mm to 100 mm). For these reasons, the floating wave dissipating device 1 of the present invention is suitable for installation at the racing boat track KB. The installation location at the racing boat track KB is not particularly limited, and the device can be installed anywhere requiring wave dissipation or buffering, such as between the outer periphery of the racing boat RB's circuit course SK and the shore KS, or in the center of the circuit course SK.

[0043] Furthermore, since it is required to attenuate waves more, the following structure is adopted to attenuate waves transmitted through the outer tube 5 and some of the inner tubes 6 as much as possible and to prevent oscillation as much as possible. That is, it is made of a mesh-like body made by fixing or integrating the crossing portions of the mesh with synthetic resin material such as polyethylene, similar to the outer tube 5 and the inner tube 6 described above. A cross section perpendicular to the longitudinal direction of the outer cylinder 5 is A pair of V-shaped transmitted wave attenuation members 18 are fixed to the four inner cylinders 6 provided in the outer cylinder 5 as follows: (See Figure 4.) .

[0044] Specifically, the float member 9 is disposed in the outer cylinder 5 at the center of the topmost row (fourth row from the top, in which six inner cylinders 6 are disposed) of the bottom three rows in which the float members 9 are disposed. In a cross section perpendicular to the longitudinal direction of the outer cylinder 5, The rows are arranged side by side in the same row, assuming that the rows are parallel to the water surface WL. 2Between the inner cylinders 6A, 6B and the inner cylinder 6C immediately above (the third row from the top in the outer cylinder 5) on which the lower part is placed in contact with these two inner cylinders 6A, 6B, more specifically, between the surface part of the inner cylinder 6A and the surface part of the inner cylinder 6C and between the surface part of the inner cylinder 6B and the surface part of the inner cylinder 6C, transmitted wave attenuation members 18A, 18B constituting the transmitted wave attenuation member 18 are fixed at a plurality of locations by fixing members such as cable ties or wires that straddle from the outside. That is, each of the transmitted wave attenuation members 18A, 18B is rectangular in a plan view, and its length in the longitudinal direction is approximately the same as the length of the inner cylinder 6 in the longitudinal direction, and its upper and lower ends in the lateral direction are in contact with the surface part of the inner cylinder 6A. The inner cylinder 6C surface section, The inner cylinder 6B surface part and the inner cylinder 6C The fixing member is fixed at a plurality of locations at desired intervals in a state of contacting the surface portion from the outside.

[0045] More specifically, the fixing member is inserted through the openings of the mesh at the bottom of one of the transmitted wave attenuation members 18A and the openings of the inner tube 6A with which the transmitted wave attenuation member 18A is in contact, and the fixing member (not shown) such as a cable tie similar to the fixing member 13 is inserted through the openings of the mesh at the top of the transmitted wave attenuation member 18A and the openings of the inner tube 6C with which the transmitted wave attenuation member 18A is in contact and placed, and the fixing member is inserted through the openings of the mesh at the bottom of the other transmitted wave attenuation member 18B and the openings of the inner tube 6B with which the transmitted wave attenuation member 18B is in contact, and the fixing member (not shown) such as a cable tie similar to the fixing member 13 is inserted through the openings of the mesh at the top of the transmitted wave attenuation member 18B and the openings of the inner tube 6C with which the transmitted wave attenuation member 18B is in contact, and then the fixing member is is the above Inner cylinder 6A, 6C and the transmitted wave attenuation members 18B are fixed to the 6B and 6C.

[0046] In this case, the outer shape of the transmitted wave attenuation members 18A and 18B is rectangular, the horizontal length in the longitudinal direction is the same as or approximately the same as the longitudinal length of each of the inner cylinders 6A, 6B, and 6C, and the vertical length in the short side direction is the length extending from the outside between the surface portion of the inner cylinder 6A and the surface portion of the inner cylinder 6C (or the length extending from the outside between the surface portion of the inner cylinder 6B and the surface portion of the inner cylinder 6C), and the transmitted wave attenuation members 18A and 18B and each of the inner cylinders 6A, 6B, and 6C are fixed by the fixing members at the points where the transmitted wave attenuation member 18A contacts the inner cylinders 6A and 6C. , and The portion where the transmitted wave attenuation member 18B contacts the inner cylinders 6B and 6C mosquito In the vicinity of the above, the welding is performed at a plurality of locations at desired intervals in the longitudinal direction.

[0047] In this embodiment, the transmitted wave attenuation members 18A and 18B are, as shown in FIG. For example, in Figure 4, the force is rushing in from the left side of the page. The angle between the wave side and the water surface WL is The transmitted wave attenuation member 18A, through which the wave first passes, has an obtuse angle (for example, about 120 degrees), and the transmitted wave attenuation member 18B, through which the wave passes after passing through the transmitted wave attenuation member 18A, has an acute angle (for example, about 60 degrees). The inner cylinders 6A, 6C and 6B, 6C are attached so that The obtuse angle of the one of the transmitted wave attenuation members 18A is about 120 degrees as described above. Not limited to angles of 110 degrees or more to 130 degrees below the level is desirable However, the acute angle of the other transmitted wave attenuation member 18B is not limited to the angle of about 60 degrees as described above, but is preferably between 50 degrees and 70 degrees. In this case, the angle is determined by selecting the size of the outer diameter of the inner cylinder 6.

[0048] In addition, when actually installed on the circular course SK, the buoyancy of the floating wave dissipating device 1 is set so that the water surface WL is located at the midpoint between the transmitted wave attenuation members 18A and 18B of the floating wave dissipating device 1, so that waves can be efficiently attenuated by the outer tube 5, the inner tube 6 and the transmitted wave attenuation member 18; this point will be described later.

[0049] The reason why the transmitted wave attenuation members 18A and 18B are provided in the central portion inside the outer cylinder 5 is that the floating type wave dissipating device 1 Front side (left side of Figure 4) ) and waves from Back side (right side of Figure 4)This is because it can attenuate waves from the shore to the same extent as waves from the shore, and moreover, it allows the floating wave dissipating device 1 itself to be made compact, and if it were provided on the outer surface of the outer tube 5, it can prevent the transmitted wave attenuation member 18 from coming off the outer tube 5 due to the impact of waves or the impact of a collision with the racing boat RB.

[0050] In this embodiment, the transmitted wave attenuation members 18A and 18B are fixed at a plurality of locations by fixing members that straddle the two adjacent inner cylinders 6A and 6B and the inner cylinder 6C that is placed directly above the two inner cylinders 6A and 6B with its lower part in contact with them from the outside. However, the present invention is not limited to this. In a cross section perpendicular to the longitudinal direction of the outer cylinder 5, The transmitted wave attenuation member 18 is provided from the outside across the inner cylinders 6 (not limited to the inner cylinder 6C) that are arranged in the same row but not adjacent to each other when the row is parallel to the water surface WL. A cross section perpendicular to the longitudinal direction of the outer cylinder 5 is It may also be fixed in a V-shape.

[0051] That is, one of the inner cylinders 6 and the other one located above the outer cylinder 5 are arranged in parallel. Inner cylinder The outer cylinder 5 is fixed to the first inner cylinder 6 by a plurality of fixing members in a state of straddling the first inner cylinder 6 from the outside, and the outer cylinder 5 is also fixed to the first inner cylinder 6 by a plurality of fixing members in a state of straddling the first inner cylinder 6 from the outside. Inner cylinder and the inner cylinder 6 located above it, and are fixed by a plurality of fixing members in a state of straddling from the outside, and The water surface WL (left or right side of the paper in FIG. 4) The angle formed by The wave first passes through one side at an obtuse angle, and after passing through the other side at an acute angle, the cross section perpendicular to the longitudinal direction of the outer cylinder 5 is A pair of V-shaped Transmitted wave attenuation material may be configured.

[0052] The open area S3 of one mesh of the transmitted wave attenuation member 18 made of this mesh is not particularly limited, but is preferably 0.6 cm 2 More than ~20cm 2 It is preferable that the thickness is about 1.2 cm or less. 2 Over 15cm 2 It is more preferable that it is about 1.7 cm or less. 2 Over 13cm 2It is more preferable that the opening area S3 is about 1 / 2 or less. When the opening area S3 is in this range, a particularly excellent wave-damping effect is exhibited. That is, the reason for reducing the opening area S3 of one mesh of the transmitted wave attenuation members 18A, 18B to this range is to appropriately reduce the amount of waves that have passed through the mesh of the outer tube 5 and the inner tube 6 and that pass through the mesh of the transmitted wave attenuation members 18A, 18B, and to appropriately increase the amount of waves that hit the frame that constitutes the mesh of the transmitted wave attenuation members 18A, 18B and are reflected, each On the side of the surging waves The water surface WL The angle formed by The transmitted wave attenuation member 18A, through which the wave first passes, has an obtuse angle, and the other transmitted wave attenuation member 18A, through which the wave passes after passing through the transmitted wave attenuation member 18A, has an acute angle. As will be described later, this effect, coupled with the fact that the reflected wave hits the next wave, more reliably mitigating and attenuating the next wave.

[0053] In this case, the open area S3 of one mesh of the transmitted wave attenuation members 18A and 18B is smaller than the open area S1 of one mesh of the outer cylinder 5, which is smaller than the open area S2 of one mesh of the inner cylinder 6. In other words, when the outer diameters (thicknesses) of the frames constituting the meshes of the outer cylinder 5, the inner cylinder 6, and the transmitted wave attenuation members 18A and 18B are the same, the mesh of the inner cylinder 6 is the coarsest, followed by the mesh of the outer cylinder 5 which is finer than the mesh of the inner cylinder, with the mesh of the transmitted wave attenuation members 18A and 18B being the finest. In other words, the total open area per unit area of ​​the meshes of the transmitted wave attenuation members 18A and 18B is the narrowest, the total open area of ​​the mesh of the outer cylinder 5 is wider than the total open area of ​​the meshes of the transmitted wave attenuation members 18A and 18B, and the total open area of ​​the mesh of the inner cylinder 6 is the widest.

[0054] The aperture ratio (opening ratio) of the mesh of the transmitted wave attenuation member 18, which attenuates the waves that have passed through the mesh of the inner tube 6 by transmitting them through its own mesh, is not particularly limited, but is preferably about 20% to 80%, more preferably about 23% to 75%, and even more preferably about 25% to 70%. If the aperture ratio is too small, the wave-damping effect decreases, and if the aperture ratio is too large, the angle between the transmitted wave attenuation member 18A or 18B and the water surface WL causes the waves reflected by the transmitted wave attenuation member 18A or 18B to hit the next wave, thereby reducing the effect of more reliably mitigating and attenuating the next wave.

[0055] Therefore, the home stretch side ( The orbit Waves coming from the stand ST side of the course SK are attenuated and transmitted through the outer tube 5 and the plurality of inner tubes 6, and then pass through the floating wave dissipating device 1 while being further attenuated.

[0056] That is, first, waves from the home stretch side hit the frame bodies constituting the mesh of the two inner tubes 6 in the same row as the outer tube 5 and the inner tube 6C and are attenuated by the resistance thereof, and the remaining waves that do not hit these frame bodies pass through the mesh of the outer tube 5 and the two inner tubes 6 described above and hit the frame bodies constituting the mesh of one of the inclined transmitted wave attenuation members 18A (which has a finer mesh than the outer tube 5 and the inner tube 6) and are attenuated by the resistance thereof, and the waves that are partially reflected by the hit are attenuated by the next incoming wave. Then, the remaining waves that have passed through the mesh of the transmitted wave attenuation member 18A are transmitted while being attenuated by the inner tube 6C and the other transmitted wave attenuation member 18B, and further by the two inner tubes 6 adjacent to the transmitted wave attenuation member 18B (on the right in Figure 4) on which the float member 9 is not provided, and the circumferential surface of the outer tube 5 on the backstretch side.

[0057] Therefore, as mentioned above, the waves generated by the racing boat RB from the home stretch are attenuated and transmitted by the outer tube 5, the inner tube 6 and the floating wave dissipating device 1, and the transmitted waves have less impact on the racing boat RB as it passes through the back stretch.

[0058] Conversely, waves from the backstretch side hit the frame bodies constituting the mesh of the two inner tubes 6 in the same row as the outer tube 5 and the inner tube 6C and are attenuated by the resistance thereof, and the remaining waves that do not hit these frame bodies pass through the mesh of the outer tube 5 and the two inner tubes 6 described above and hit the frame bodies constituting the mesh of the other inclined transmitted wave attenuation member 18B (which has a finer mesh than the outer tube 5 and the inner tube 6) and are attenuated by the resistance thereof, and the waves that are partially reflected by the hit hit the next arriving wave and are attenuated. The remaining waves that have passed through the mesh of the transmitted wave attenuation member 18B hit the inner tube 6C, one of the transmitted wave attenuation members 18A, and further hit the two inner tubes 6 and 6 adjacent to this transmitted wave attenuation member 18A (on the left in FIG. 4) on which the float member 9 is not provided. The home stretch The light passes through the outer cylinder 5 while being attenuated by the outer surface of the outer cylinder 5 on the side.

[0059] Therefore, as mentioned above, waves generated by the racing boat RB from the backstretch side are attenuated and transmitted by the outer tube 5, the inner tube 6 and the floating wave dissipating device 1, and the transmitted waves have less impact on the racing boat RB as it passes through the home stretch.

[0060] Therefore, in addition to the outer tube 5 and the multiple inner tubes 6, the presence of the transmitted wave attenuation member 18 can attenuate waves more effectively, preventing rocking as much as possible, and particularly when the floating wave dissipating device 1 is installed at the racing boat track KB, it can minimize damage to the racing boat RB and the floating wave dissipating device 1 even in the event of a collision.

[0061] As described above, the transmitted wave attenuation member 18 has the transmitted wave attenuation member 18A on one slope and the transmitted wave attenuation member 18B on the other slope, and therefore can attenuate waves from the home stretch and back stretch at the boat racing track KB. This also means that the impact of waves reflected by the shore KS at the boat racing track KB on the racing boat RB can be reduced. Furthermore, this is not limited to the boat racing track KB, but can also be installed near the shore in swimming pools, other riverbanks, lakes, reservoirs, the sea, etc., so that the floating wave dissipating device 1 can attenuate waves from the shore that are reflected by the shore.

[0062] And from the stand ST Look The first turn mark 2A is connected to the outer end of the floating wave dissipating device 1 installed at a position visible on the right hand side via a connecting member (rope, chain, etc.) 20 connected at one end to the attachment portion 15A of the wire rope 15, but the small turn prevention buoy 3 is not connected to the inner end. (See Figures 1, 5 and 6.) Also, from the stand ST Look The floating wave dissipating device 1, which is installed at a position visible on the left, is connected to the outer end thereof via the connecting member 20, one end of which is connected to the mounting portion 15A of the wire rope 15, and the anti-tight turning buoy 3 is connected to the inner end thereof also via the connecting member 20 (see Figures 1, 6 and 7).

[0063] Next, the mooring band 11, which is the fastening body, will be described with reference to Figures 8 and 9. As shown in Figure 2, this stainless steel mooring band 11 surrounds the outer cylinder 5 from the outside at positions corresponding to both ends and the middle float 7 of the five floats 7 inside the outer cylinder 5, thereby securely fastening the outer cylinder 5 from the outside.

[0064] Specifically, the mooring band 11 has a pair of semicircular fastening bodies 11A having a required width and thickness, one end of which is connected by a hinge 11B to be rotatably supported, and the other end has a flange 11C with a through hole (not shown) (see Figure 8).The flanges 11C of the pair of fastening bodies 11A are aligned while surrounding the outer cylinder 5, and bolts 21 are passed through the through holes and nuts 22 are screwed in to fasten them, surrounding the outer cylinder 5 from the outside and securely fastening them. (See Figure 9.) .

[0065] Then, the stainless steel eye nuts 23 are welded to the fastening body 11A slightly above the flange 11C, and stainless steel eye nuts 25 are welded to two sinkers 24 installed on the bottom WB of the lake at the KB boat racing track. A diving worker connects the top and bottom of each of the mooring chains 27 to the eye nuts 23, 25 via the shackles 26 connected to both ends, and as a result, the floating wave dissipating device 1 is tethered to the sinkers 24 and floats in the required position (see Figure 9).

[0066] As mentioned above, the water surface WL is set to be the midpoint between the transmitted wave attenuation members 18A and 18B of the floating wave dissipating device 1. Specifically, the buoyancy of the floating wave dissipating device 1 itself is set so that the water surface is lower than the water surface WL as shown in Fig. 4, but as mentioned above, by adjusting the length of each of the mooring chains 27, the water surface WL can be set to be the midpoint between the transmitted wave attenuation members 18A and 18B, for example, approximately the center position in the vertical direction of the transmitted wave attenuation members 18A and 18B.

[0067] Next, the assembly work of the floating wave dissipating device 1 will be described below. First, as described above, the float members 9 are inserted and stored in the 13 inner cylinders 6, respectively. Then, the inner cylinder 6C, into which the wire rope 15 will be inserted later, is placed on top of the two inner cylinders 6A and 6B, which are arranged side by side and into which the float members 9 have been inserted and stored, and one of the transmitted wave attenuation members 18A is fixed to the surface portions of the inner cylinder 6A and the inner cylinder 6C, and the other transmitted wave attenuation member 18B is fixed to the surface portions of the inner cylinder 6B and the inner cylinder 6C, respectively, using a plurality of fixing members (not shown).

[0068] In this case, the floating wave dissipating device 1 is placed in the position where the inner cylinder 6 is housed. FIG. 1 is a vertical cross-sectional side view of the outer cylinder 5 taken in a direction perpendicular to the longitudinal direction thereof. As can be seen from Figure 4, the pair of transmitted wave attenuation members 18 are fixed at multiple locations to the inner tubes 6A and 6C and to the inner tubes 6B and 6C using the fixing members so that the shape of the cut surface of one of the transmitted wave attenuation members 18A in a vertical cross section is a tangent to the circle of the inner tube 6A and the circle of the inner tube 6C, and so that the shape of the cut surface of the other of the transmitted wave attenuation members 18B in a vertical cross section is a tangent to the circle of the inner tube 6B and the circle of the inner tube 6C.

[0069] Next, as can be seen from Figure 4, In a cross section perpendicular to the longitudinal direction of the outer cylinder 5, When the rows are parallel to the water surface WL, Of the six rows above and below The nine inner cylinders 6 each having the float member 9 inserted therein are arranged in the bottom two rows, and the row above (third row from the bottom) has the inner cylinder 6 with the float member 9 inserted therein at the leftmost position in FIG. 4 (the frontmost position on the front side as seen from the stand ST), and Next to the right The empty inner cylinder 6 is placed inside the The inner cylinders 6A and 6B and the inner cylinder 6B Next to the right The empty inner cylinder 6 and the empty inner cylinder 6 Next to the right The inner cylinder 6 with the float member 9 inserted therein is disposed in the fourth row from the bottom. (It's also on the home stretch side.) The two empty inner tubes 6 and the rear side viewed from the stand ST (It is also on the backstretch side.)Two empty inner cylinders 6 are arranged in the fifth row from the bottom, four empty inner cylinders 6 are arranged in the fifth row from the bottom, and three empty inner cylinders 6 are arranged in the sixth row from the bottom, which is the top row. A plurality of the inner cylinders 6 are wrapped and tied with the rope 10. In this way, four groups of the inner cylinders 6 are produced, each bundled and wrapped with the rope 10.

[0070] Then, first, one float 7 and one group of inner cylinders 6 are placed (stored) inside the outer cylinder 5, and the shape-retaining body 14 is inserted therethrough, but the insertion position is such that the shape-retaining body 14 is inserted through the float 7 into the second inner cylinder 6 from the front side and the second inner cylinder 6 from the back side in the third row from the bottom of the group of inner cylinders 6.

[0071] The next shape-retaining body 14 is added to each of the shape-retaining bodies 14 through which the first float 7 and the group of inner cylinders 6 have been inserted, via a connecting portion 14A with a slightly larger diameter. Then, as described above, the second float 7 and the group of inner cylinders 6 are inserted through each of the added shape-retaining bodies 14, and the next shape-retaining body 14 is added to each of the inserted holders 14. This process is repeated sequentially until each shape-retaining body 14 is inserted into five of the floats 7 and four of the groups of inner cylinders 6 (see FIG. 4). By inserting this shape-retaining body 14, bending or twisting of the outer cylinder 5 during assembly of the floating wave dissipating device 1 is suppressed, and the shape of the outer cylinder is maintained.

[0072] Next, the five floats 7 and the four inner cylinders 6 with the shape retainers 14 inserted therethrough are housed inside the outer cylinder 5, and then the end covers 8 are attached and fixed to both ends of the outer cylinder 5, respectively.

[0073] The installation work of each end cover 8 will be described below. First, a guide string (not shown) is passed through the five floats 7 and the four groups of inner cylinders 6 inside the outer cylinder 5, and one end of the guide string is connected to the wire rope 15 that has been passed through one of the end covers 8 before installation. While pulling the string, the wire rope 15 is passed through the floats 7 and the groups of inner cylinders 6 in order, until the five floats 7 and the four groups of inner cylinders 6 are passed over the entire area of ​​the outer cylinder 5.

[0074] In this case, before the wire rope 15 is passed through the floats 7 and the group of inner tubes 6 in sequence, the opening 8D is already opened in the center of the recess 8C formed in the center of the retaining portion 8B of one of the end covers 8, and a bolt 30 having a through hole through which one end of the wire rope 15 passes is inserted into this opening 8D from the outside via a washer 31, and a nut 33 is screwed onto the inside of the end cover 8 via washers 31 and 32.

[0075] The wire rope 15 has the attachment portion 15A formed at one end thereof, which is about 1.2 m long and does not pass through the nut, and is folded back, and as shown in Figure 5, a total of three wire clips 16 are attached to two locations: the position where the wire rope 15 abuts against one of the end covers 8 and the folded back portion.

[0076] Then, as described above, the other end of the wire rope 15 that has passed through the five floats 7 and the group of four inner tubes 6 is passed through the other end cover 8, and then a folded portion is made in the same way as that made at the one end.However, before making this, the washer 32 and the nut 33 are placed on the inside of the end cover 8, and the washer 31 and the bolt 30 are placed on the outside, and the wire rope 15 is passed through the through hole of the bolt 30, and the mounting portion 15A and the folded portion are made at this penetrating and protruding portion in the same way as those made at the one end, and the wire clip 16 is attached to two places: the position where the wire rope 15 abuts the other end cover 8, and the folded portion.

[0077] In this way, the five floats 7 and the four inner cylinders 6 are housed inside the outer cylinder 5, and the end covers 8 are attached to both ends of the outer cylinder 5. The inner cylinders 6 and the floats 7 and the fitting between both ends of the outer cylinder 5 and each end cover 8 is fixed so as not to be released.

[0078] Thereafter, the mooring bands 11 are wound around the outer periphery of the outer cylinder 5 corresponding to a total of three of the five floats 7 inside the outer cylinder 5, one at each end and one in the center, to surround the outer cylinder 5 and fasten it from the outside. That is, the mooring bands 11 are wrapped around the outer cylinder 5 from the open state by the hinges 11B, and with the flanges 11C aligned, bolts 21 are passed through the through holes and nuts 22 are screwed on to securely fasten them.

[0079] The floating wave dissipating device 1 on the right in Fig. 1 has the first turn mark 2A connected to its outer end, and the floating wave dissipating device 1 on the left has the second turn mark 2B connected to its outer end, and further has the tight-turn prevention buoy 3 connected to the inner end of the second turn mark 2B. Specifically, as shown in Fig. 6, the left and right floating wave dissipating devices 1 have the attachment part 15A of the wire rope 15 on one end connected to the first and second turn marks 2A and 2B via the connecting member 20, and as shown in Fig. 7, the left floating wave dissipating device 1 has the attachment part 15A of the wire rope 15 on the other end connected to the tight-turn prevention buoy 3 via the connecting member 20.

[0080] Thereafter, a submerged worker connects the top and bottom of each chain 27 to the eye nuts 25 fixed to each sinker 24 and the eye nuts 23 fixed to the mooring bands 11 via the shackles 26 connected to both ends, thereby suspending the floating wave dissipating device 1 to the required position.

[0081] In other words, when the chains 27 are not connected to the eye nuts 25 fixed to the sinkers 24 via the shackles 26, the floating wave dissipating device 1 floats at a position higher than the water surface WL shown in Figure 4 due to buoyancy, and when they are connected, the floating wave dissipating device 1 is lowered and the water surface WL is at the position shown in Figure 4.

[0082] Next, the operation of the floating wave dissipating device 1 will be explained. For example, waves coming from a direction perpendicular to the longitudinal direction of the floating wave dissipating device 1, i.e., from the home stretch side, first hit the outer tube 5 and are attenuated as they pass through the mesh. Next, the waves that pass through the mesh of the outer tube 5 and enter the outer tube 5 are attenuated as a bundle. Each of the six inner cylinders Contact with The two lenses that make up the six inner cylinder groups When passing through the mesh of the inner cylinder 6, the wave is significantly attenuated. At this time, when passing through the mesh of one of the transmitted wave attenuation members 18A, the wave is further attenuated. Then, when passing through the mesh of the one of the transmitted wave attenuation members 18A, the wave is further attenuated, and is further attenuated into the inner cylinder 6C. View from Stand ST The waves that entered from the front side exit the inner cylinder 6C. The rear side of the inner tube 6C as viewed from the stand ST The wave passes through the mesh of the other transmitted wave attenuation member 18B and is also attenuated when passing through the mesh of the other transmitted wave attenuation member 18B. Two parallel The wave is attenuated by the circumferential surfaces of the inner cylinder 6 and the outer cylinder 5 on the backstretch side, passes through, and moves to the outside of the floating wave dissipating device 1 .

[0083] In detail, the waves from the home stretch side (the waves from the left side of the paper in FIG. 4) hit the frame that constitutes the mesh of the outer tube 5 and are attenuated by the resistance, and the remaining waves that do not hit the frame pass through the mesh of the outer tube 5 and are attenuated by the resistance of the frame. On the left in the same row The float member 9 is not provided. The third row from the top of Figure 4 The waves hit the frame that forms the mesh of the two inner cylinders 6 and are attenuated by the resistance, and the remaining waves that do not hit the frame pass through the mesh of the two inner cylinders 6, The oneThe waves hit the frame that constitutes the mesh of the inclined transmitted wave attenuation member 18A and are attenuated by the resistance thereof, and the waves that are partially reflected by the hit hit the next incoming wave and are attenuated.

[0084] And like this The one The frame that forms the mesh of the inclined transmitted wave attenuation member 18A reflects a part of the incoming waves, but since the transmitted wave attenuation members 18A and 18B are formed of a mesh body, the remaining waves that have passed through the mesh of the transmitted wave attenuation member 18A are reflected by the inner tube 6C and The other the transmitted wave attenuation member 18B, and further the transmitted wave attenuation member 18B adjacent thereto (in FIG. 4 Next to the right ) The two inner tubes 6 and the backstretch side where the float members 9 are not provided The outer cylinder 5 When it hits the frame that forms the mesh of the peripheral surface, the wave passes through the mesh while being attenuated, and moves out of the floating wave dissipating device 1.

[0085] In this case, the waves advance while rising and falling, so the waves from the home stretch side The inner cylinder 6 group The waves that pass through the mesh of the inner tube 6 also travel up and down, and hit the frame constituting the mesh of one of the inclined transmitted wave attenuation members 18A while rising diagonally upward and being reflected diagonally upward, or while hitting the frame constituting the mesh of one of the inclined transmitted wave attenuation members 18A while falling diagonally downward and being reflected diagonally downward. The waves reflected diagonally upward collide with the next wave traveling diagonally downward while rising and are attenuated, and the waves reflected diagonally downward collide with the next wave traveling diagonally upward and are attenuated reliably. In this way, by setting the opening area S3 of one mesh of the transmitted wave attenuation member 18A made of a mesh body in the preferred range as described above and by setting the angle formed by the transmitted wave attenuation member 18A with the water surface WL on the incoming wave side to an obtuse angle, the reflected waves can hit the next wave and more reliably attenuate this next wave.

[0086] In addition, waves from the racing boat RB traveling on the backstretch side, and waves that come from the homestretch side as described above, pass through the floating wave dissipating device 1, move outside the wave dissipating device 1, and are reflected by the shore KS can also be attenuated in the same way as waves coming from the homestretch side as described above.

[0087] That is, the waves from the backstretch side (the waves from the right side of the paper in FIG. 4) hit the frame that constitutes the mesh of the outer cylinder 5 and are attenuated by the resistance, and the remaining waves that do not hit the frame pass through the mesh of the outer cylinder 5 and are attenuated by the resistance of the frame. To the right in the same row The float member 9 is not provided. The third row from the top of Figure 4 The waves hit the frame that forms the mesh of the two inner cylinders 6 and are attenuated by the resistance, and the remaining waves that do not hit the frame pass through the mesh of the two inner cylinders 6, The other The waves hit the frame that constitutes the mesh of the inclined transmitted wave attenuation member 18B and are attenuated by the resistance thereof, and the waves that are partly reflected by the hit hit the next incoming wave and are attenuated.

[0088] And like this The other The frame that forms the mesh of the inclined transmitted wave attenuation member 18B reflects a part of the incoming waves, but since the transmitted wave attenuation members 18A and 18B are formed of a mesh body, the remaining waves that have passed through the mesh of the transmitted wave attenuation member 18B are reflected by the inner tube 6C and The one the transmitted wave attenuation member 18A, and further the transmitted wave attenuation member 18A adjacent thereto (in FIG. 4 Next to the left ) The two inner tubes 6 on which the float members 9 are not provided and the The outer cylinder 5 When it hits the frame that forms the mesh of the peripheral surface, the wave passes through the mesh while being attenuated, and moves out of the floating wave dissipating device 1.

[0089] In this case, the waves advance while rising and falling, so the waves from the backstretch side The inner cylinder 6 groupThe waves that pass through the mesh of the inner tube 6 also travel up and down, and hit the frame constituting the mesh of the other inclined transmitted wave attenuation member 18B while rising diagonally upward and being reflected diagonally upward, or while hitting the frame constituting the mesh of the other inclined transmitted wave attenuation member 18B while falling diagonally downward and being reflected diagonally downward. The waves reflected diagonally upward collide with the next wave traveling diagonally downward while rising and are attenuated, and the waves reflected diagonally downward collide with the next wave traveling diagonally upward and are reliably attenuated. In this way, by setting the opening area S3 of one mesh of the transmitted wave attenuation member 18B made of a mesh body in the preferred range as described above, and by making the angle formed by the transmitted wave attenuation member 18B and the water surface WL on the incoming wave side an obtuse angle, the reflected waves can hit the next wave and more reliably attenuate this next wave.

[0090] As described above, the waves from the home stretch side or the back stretch side are The inner cylinder 6 group Because the waves pass through the mesh of the inner tube 6 multiple times and also through the mesh of the transmitted wave attenuation members 18A and 18B, an excellent wave-dissipating effect is exhibited. Furthermore, by making the mesh sizes and shapes of the outer tube 5, the inner tube 6, and the transmitted wave attenuation member 18 different, the wave-dissipating effect can be increased, and waves with different wavelengths (periods) and amplitudes (wave heights) can be effectively attenuated. Furthermore, if the racing boat RB collides with the floating wave-dissipating device 1, the outer tube 5 and the inner tube 6 have elasticity and can effectively absorb the impact, ensuring the safety of the racers on board the racing boat RB.

[0091] In the above embodiment, the transmitted wave attenuation member 18 is configured by a pair of transmitted wave attenuation members 18A and 18B, but the present invention is not limited to this and may be configured by a transmitted wave attenuation member 18C as shown in FIG.

[0092] That is, the transmitted wave attenuation member 18C is made of a mesh-like material and has the same shape and size of openings as the outer cylinder 5 and the inner cylinder 6, and attenuates the waves that have passed through the mesh of the outer cylinder 5 and the inner cylinder 6 by passing them through its own mesh. In this state, one inner cylinder 6C is placed on top of two inner cylinders 6A and 6B that are arranged side by side inside the outer cylinder 5, The aforementioned Boat Racecourse KB The three inner cylinders 6A, 6B, and 6C are arranged in a plurality of rows, each row being parallel to the water surface, so as to be wrapped over the entire longitudinal area thereof. In a cross-sectional view perpendicular to the longitudinal direction of the outer cylinder, The angle between the water surface WL and the wave side is The first slope through which the wave penetrates is obtuse, and the second slope through which the wave penetrates after penetrating this slope is acute, with the bottom surface parallel to the water surface. The structure may be a substantially triangular shape with rounded corners. For example, from the left side of Figure 10 The water surface WL on the side of the incoming wave One slope 18C1 The angle between It is an obtuse angle For example, it is about 120 degrees (not limited to this angle, but preferably between 110 degrees and 130 degrees). The wave passes through the slope 18C1 and then passes through the slope 18C2, which has an acute angle (for example, about 60 degrees). The roles and functions of 18C1 and 18C2 are similar to those of the transmitted wave attenuation members 18A and 18B described above, and therefore a description thereof will be omitted.

[0093] In this case, the transmitted wave attenuation member 18C and the inner tubes 6A, 6B, 6C are fixed at desired locations with desired spacing by fixing members such as cable ties as described above, and the transmitted wave attenuation member 18C, which has an approximately triangular shape when viewed from the side, may be constructed as a single unit from the beginning, or may be constructed as a separate unit that has been integrated with a connecting member (not shown).

[0094] Furthermore, the transmitted wave attenuation member 18C is not limited to the case where it encloses the three inner cylinders 6A, 6B, and 6C. In a cross section perpendicular to the longitudinal direction of the outer cylinder 5, from the left or right side of the paper surface of FIG. As long as there are two slopes that form an obtuse angle with the water surface WL on the side of the incoming waves, the number of inner tubes 6 is not limited to two rows of three, one above the other, arranged parallel to the water surface WL (see Figure 10), but may also be, for example, a number of six inner tubes 6 in three rows, or a number of ten inner tubes 6 in four rows, one above the other.

[0095] The floating wave dissipating device 1 assembled as described above is not limited to being installed within the circular course SK, but may also be installed by mooring it to the shore KS of the boat racing course KB opposite the straight course of the circular course SK via a mooring device 34 (see FIG. 1). In this case, multiple floating wave dissipating devices 1 are connected by connecting members such as bolts and nuts.

[0096] Specifically, the mounting portions 15A of the wire ropes 15 protruding outward from the end covers 8 of the adjacent floating wave dissipating devices 1 can be overlapped, the shanks of the bolts can be inserted into both mounting portions 15A, and the nuts can be screwed onto them, so that the two mounting portions 15A sandwiched between the shanks and nuts can be connected together, and the device can be installed by mooring it via the mooring device 34 to the shore KS of the boat racing course KB that faces the straight course of the circular course SK (see FIG. 1). This can attenuate waves reflected from the shore KS.

[0097] Although the embodiments of the present invention have been described above, various alternatives, modifications, and variations are possible for those skilled in the art based on the above description, and the present invention includes the various alternatives, modifications, and variations described above within the scope of the present invention. [Explanation of symbols]

[0098] 1. Floating wave dissipating device 5 outer cylinder 6 Inner cylinder 6A, 6B, 6C inner cylinder 7. Float 8 End cover 9 Float member 18 Transmitted wave attenuation material 18A, 18B, 18C Transmitted wave attenuation material

Claims

1. an outer tube made of a mesh material that attenuates waves by allowing them to pass through the mesh; a plurality of inner cylinders each made of a mesh-like body and housed in a bundle in the outer cylinder, attenuating waves that have passed through the mesh of the outer cylinder by passing them through their own mesh; a plurality of rod-shaped float members inserted into the inner cylinder; a plurality of floats arranged alternately with the bundle of inner cylinders in the outer cylinder; a pair of end covers each having a bottomed hollow cylindrical shape and each having an opening into which an end of the outer cylinder is fitted when the plurality of inner cylinders and the floats are housed inside, and the other end cover is closed; A floating wave dissipating device comprising a mesh-like body, which attenuates waves that have passed through the mesh of the outer tube and the inner tube by passing them through its own mesh, and which is fixed by a plurality of fixing members in a state in which it straddles from the outside one of the inner tubes and the inner tube located above it, arranged in the same row when the row is parallel to the water surface within the outer tube, and another of the inner tubes arranged in the same row next to the one inner tube within the outer tube (5) and the inner tube located above it, and which forms an obtuse angle with the water surface on the side of the incoming waves and has a V-shape when viewed from the side.

2. an outer tube made of a mesh material that attenuates waves by allowing them to pass through the mesh; a plurality of inner cylinders each made of a mesh-like body and housed in a bundle in the outer cylinder, attenuating waves that have passed through the mesh of the outer cylinder by passing them through their own mesh; a plurality of rod-shaped float members inserted into the inner cylinder; a plurality of floats arranged alternately with the bundle of inner cylinders in the outer cylinder; a pair of end covers each having a bottomed hollow cylindrical shape and each having an opening into which an end of the outer cylinder is fitted when the plurality of inner cylinders and the floats are housed inside, and the other end cover is closed; The floating wave dissipating device is constructed of a mesh-like body and attenuates waves that have passed through the mesh of the outer tube and the inner tube by passing them through its own mesh, and is characterized in that it is equipped with a pair of transmitted wave attenuation members fixed by a plurality of fixing members in a state in which one inner tube is placed on top of two inner tubes that are arranged side by side in the outer tube adjacent to each other in the same row when the row is parallel to the water surface within the outer tube, one of which is straddling from the outside to the surface of one of the two inner tubes and the surface of the inner tube on which it is placed, and the other is straddling from the outside to the surface of the other of the two inner tubes and the surface of the inner tube on which it is placed, and each of which forms an obtuse angle with the water surface on the side of the incoming waves and has a V-shape when viewed from the side.

3. an outer tube made of a mesh material that attenuates waves by allowing them to pass through the mesh; a plurality of inner cylinders each made of a mesh-like body and housed in a bundle in the outer cylinder, attenuating waves that have passed through the mesh of the outer cylinder by passing them through their own mesh; a plurality of rod-shaped float members inserted into the inner cylinder; a plurality of floats arranged alternately with the bundle of inner cylinders in the outer cylinder; a pair of end covers each having a bottomed hollow cylindrical shape and each having an opening into which an end of the outer cylinder is fitted when the plurality of inner cylinders and the floats are housed inside, and the other end cover is closed; A floating wave dissipating device is constructed of a mesh-like body, and attenuates waves that have passed through the mesh of the outer tube and the inner tube by passing them through its own mesh, and is characterized in that it has a roughly triangular shape when viewed from the side, with two faces that form an obtuse angle with the water surface on the side of the incoming waves, and is equipped with a transmitted wave attenuation member that wraps around multiple rows of the inner tube when the rows are arranged parallel to the water surface.

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