JP2023000565A - Mooring device and float island unit - Google Patents

Abstract

To provide a mooring device for preventing damage of a float island due to stress concentration.SOLUTION: A mooring device 4 for a float island 3 including a plurality of solar floats 5 for supporting solar panels 2 on water includes: an island bumper 16 provided on the water surface along an outer periphery of the float island 3 for buffering stress concentration due to mooring; connection ropes 13, 25 for connecting the island bumper 16 to the float island 3; and a plurality of mooring ropes 15 for connecting the island bumper 16 to anchors 14 provided on the water bottom.SELECTED DRAWING: Figure 1

Description

The present invention relates to a mooring device and a float island unit for a float island with a plurality of solar floats supporting solar panels on water.

Float islands are used to place multiple photovoltaic panels (solar panels) on water, with multiple floats each having a solar panel mounted thereon. Floating islands placed on the water are moored to the bottom of the water via mooring members such as ropes, so it is necessary to provide connection points with the mooring members on the float islands. As such a float island, for example, Patent Literature 1 discloses a float assembly in which floats on which no solar panels are mounted are arranged on the outer periphery. In this float assembly, mooring members are fixed to some of the floats arranged on the outer periphery.

Japanese Patent Application Laid-Open No. 2020-083218

However, in the float assembly described above, when the float assembly sways under the influence of wind, water flow, etc., a large load is applied to the connection points with the mooring members due to stress concentration due to mooring. Therefore, the float to which the mooring member is fixed may be damaged.

In view of the background described above, an object of the present invention is to provide a mooring device that prevents damage to a floating island due to stress concentration.

To solve the above problem, one aspect of the present invention is a mooring system (4) for a floating island (3) comprising a plurality of solar floats (5) supporting solar panels (2) on water. An island bumper (11) provided on the water surface along the outer periphery of the float island for buffering stress concentration due to mooring, and a plurality of connecting ropes (13, 25) connecting the island bumper to the float island. ) and a plurality of mooring ropes (15) connecting said island bumper to anchors (14) provided at the bottom of the water.

According to this aspect, when the floating island is shaken by wind or water flow, the island bumper receives stress caused by the mooring. Therefore, the concentration of stress on the floating island is relieved, and the connection between the floating island and the mooring device is less likely to break.

In the above aspect, the mooring ropes are provided so as to extend in a plurality of directions different from each other from each longitudinal end of the island bumper, and the connecting ropes are connected to a plurality of connecting portions ( 8) may be provided so as to extend in a plurality of mutually different directions.

According to this aspect, the floating island is moored in a plurality of different directions via the island bumper. Therefore, the float island is less likely to sway even under the influence of wind and water currents, and is less likely to receive the load caused by the impact when swayed.

In the above aspect, the island bumper may include a bumper body (16, 116) to which the connection rope and the mooring rope are connected, and a floating body (17) that generates buoyancy.

According to this aspect, the bumper main body, which generates stress due to mooring, and the floating body, which generates buoyancy, can be composed of separate members. Therefore, the bumper main body is made of a highly rigid member, and the floating body is made of a lightweight member, so that both rigidity and buoyancy can be improved at the same time.

In the above aspect, the bumper body may include a bumper frame (16) having a truss structure.

According to this aspect, even if a mooring force acts on the bumper body, the truss-structured bumper frame is less likely to deform, so stress is less likely to concentrate on the float island. Moreover, since the bumper main body can be made lighter, transportation and buoyancy adjustment are easy.

Said aspect WHEREIN: The said floating body may accommodate inside the ballast (20) for buoyancy adjustment so that it can be put in and taken out.

According to this aspect, the position of the floating body relative to the water surface (degree of floating, degree of sinking) can be adjusted by taking in and out the ballast. Since the ballast is housed inside, the degree of sinking increases, so the floating body is less susceptible to wind power and hydraulic power (water resistance), making it less likely to sway.

In the above aspect, the ballast may be water, and a bulkhead (21) may be formed inside the floating body.

According to this aspect, since the ballast is water, it is possible to easily adjust the buoyancy after placing the floating body in the water in accordance with the mooring position of the float island. Also, it is easy to take out the ballast when removing the floating body. Furthermore, the water contained inside the floating body is confined in the area defined by the bulkhead. Therefore, even if the floating body is shaken by wind or water flow, the posture can be maintained without turning over.

In the above aspect, the floating body may have a pair of vertical surfaces (19) extending substantially vertically proximal and distal to the floating island.

According to this aspect, when the float island is shaken by wind or water currents, resistance is generated between the water and the vertical surface, and movement of the floating body is suppressed. Therefore, the load applied to the floating island is reduced.

Said aspect WHEREIN: You may further provide the windshield body (12) provided above the said bumper main body and suppressing the wind force which acts on the said solar panel.

According to this aspect, the wind force acting on the solar panel is suppressed. Therefore, the floating island that supports the solar panel is less likely to sway due to the wind force, so that the load applied to the connecting portion of the floating island with the mooring device can be reduced.

In the above aspect, the windshield may have a sloped surface (23) that slopes upward toward the float island side.

According to this aspect, the wind blowing from the side of the windshield toward the side of the float island flows upward due to the inclined surface. Therefore, the wind force acting on the solar panel supported by the floating island is suppressed. As a result, the floating island that supports the solar panel is less likely to be shaken by the wind force, so that the load applied to the connecting portion of the floating island with the mooring device can be reduced.

In the above aspect, the bumper body may be divided into a plurality of bumper body members (116a).

According to this aspect, transportation of the bumper body is facilitated. Therefore, construction of the mooring device is facilitated. Also, by dividing the bumper body into a plurality of bumper body members, the overall size of the bumper body can be increased. Therefore, a large floating island can be moored.

An aspect of the invention is a float island unit (1, 101, 201) comprising at least one said mooring device of the above aspect and at least one said float island of the above aspect, wherein at least one of said A float island comprises a plurality of float islands closely spaced apart, at least one of said mooring devices being two end mooring devices (4a) arranged on either side of said float island in the direction of arrangement. and an intermediate mooring device (4b) positioned between a pair of said floating islands adjacent to each other and connected to both floating islands by said connecting ropes (25).

According to this aspect, one intermediate mooring device is connected to two floating islands arranged on either side thereof. Thus, the number of mooring devices required when mooring multiple floating islands can be reduced. In addition, the space required for mooring is also reduced, allowing multiple float islands to be placed closer together than if each float island required two mooring devices. can. Therefore, more floating islands can be arranged within a given area.

An aspect of the invention is a float island unit (201) comprising at least one mooring device of the above aspect and at least one float island of the above aspect, wherein at least one mooring device comprises the float A plurality of mooring devices arranged on both sides in the arrangement direction of the island, each longitudinal end of each of the island bumpers being connected to each other by a bumper connecting rope, and a plurality of connecting portions provided on the floating island. Auxiliary connection ropes (213) provided extending in a plurality of directions different from each other are connected to the bumper connection rope, and the bumper connection rope is provided to the bottom of the water by a plurality of auxiliary mooring ropes (215). should be connected to multiple anchors.

According to this aspect, the float island is connected to the anchor via the auxiliary connecting rope, the bumper connecting rope and the auxiliary mooring rope. This makes it difficult for the float island to swing in the longitudinal direction of the island bumper. Therefore, the load applied to the connecting portion of the floating island with the island bumper can be reduced.

According to the above aspect, it is possible to provide a mooring device that prevents damage to the float island due to stress concentration.

1 is a perspective view of a float island unit according to a first embodiment; FIG. Perspective view of part of the float island Side view of end mooring system Top view of the end mooring device with the windshield removed Perspective view of the lower half of the floating body A perspective view of a float island unit according to the second embodiment. A perspective view of a float island unit according to a third embodiment.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the following description, East (E), West (W), South (S) and North (N) follow the definitions shown in FIG.

FIG. 1 is a perspective view of a float island unit 1 according to the first embodiment. As shown in FIG. 1, the float island unit 1 according to the first embodiment includes two float islands 3 supporting a plurality of solar panels 2 (see FIG. 2) on the water, and two float islands 3 on the bottom of the water. It is provided with three mooring devices 4 (end mooring device 4a, middle mooring device 4b) for mooring. The two floating islands 3 are arranged close to each other with a predetermined distance therebetween. In FIG. 1, the solar panel 2 is seen through and shown.

FIG. 2 is a perspective view of a portion of the float island 3. FIG. As shown in FIG. 2, the float island 3 comprises a plurality of solar floats 5 each capable of supporting one solar panel 2, and a plurality of bridges 6 for connecting adjacent solar floats 5. and In this embodiment, the float island 3 has a rectangular shape by arranging a plurality of rows of solar floats 5 in the north-south direction and the east-west direction. The float island 3 is arranged such that a pair of opposing short sides extend in the east-west direction and a pair of opposing long sides extend in the north-south direction (see FIG. 1).

The bridge 6 is a floating body made of a hollow structure made of resin, and has an elongated shape extending in the east-west direction. The bridges 6 are arranged between the solar floats 5 arranged adjacent to each other in the north-south direction and outside the solar floats 5 arranged at each end in the north-south direction. The bridge 6 has an elongated shape by connecting a plurality of bridge constituent members 7, and is connected to the solar floats 5 arranged adjacent to the north and south. A plurality of connecting portions 8 are provided on the bridges 6 arranged outside the solar floats 5 arranged at respective ends in the north-south direction. In this embodiment, the connecting portion 8 is a through hole.

The solar float 5 is a floating body for supporting the solar panel 2 . The solar float 5 is made of resin and has a rectangular shape in a plan view. In this embodiment, one solar panel 2 is supported on each of all solar floats 5 . A short support leg 9S and a long support leg 9L having different lengths (heights) are attached to two opposite sides of the solar float 5 . The solar panel 2 is supported by the solar float 5 in an inclined posture via support legs 9S and 9L so that the light receiving surface faces south.

As shown in FIG. 1, two end mooring devices 4a are arranged on both sides of the two floating islands 3 in the arrangement direction. An intermediate mooring device 4b is arranged between two floating islands 3 which are adjacent to each other.

FIG. 3 is a side view of the end anchoring device 4a. As shown in FIG. 3, the end mooring device 4a includes an island bumper 11 provided along the outer periphery of the float island 3, a windshield body 12 provided above the island bumper 11, and the island bumper 11 attached to the float island. 3 and a plurality of mooring ropes 15 connecting the island bumper 11 to anchors 14 provided on the bottom of the water. The island bumper 11 receives an impact from the mooring rope 15 when the float island 3 is shaken by wind or water flow, thereby buffering stress concentration on the float island 3 due to mooring.

FIG. 4 is a plan view of the end mooring device 4a with the windshield 12 removed. In FIG. 4, the solar panel 2 is seen through. As shown in FIG. 4, the island bumper 11 has a bumper frame 16 and a floating body 17 on which the bumper frame 16 is mounted. The bumper frame 16 is a long member extending along the short sides of the float island 3 . The bumper frame 16 is made of a material having higher rigidity than the float island 3 and constitutes the bumper main body of the island bumper 11 . In this embodiment, the bumper frame 16 has a truss structure and is made of metal. The bumper frame 16 is arranged so that the triangular structural surface faces up and down.

As shown in FIGS. 3 and 4 , the floating body 17 is a resin-made hollow structure that generates buoyancy and applies the generated buoyancy to the bumper frame 16 . The floating body 17 is preferably made of a material lighter than the bumper frame 16 (for example, polypropylene or the like). The floating body 17 has a rectangular shape in plan view. The floating body 17 has a substantially flat upper surface 18 and a pair of vertical surfaces 19 connected to the upper surface 18 and extending substantially vertically proximally and distally with respect to the floating island 3 . The floating body 17 is preferably formed so that its height is maximum at the pair of vertical surfaces 19 and its height is minimum at the center of the pair of vertical surfaces 19 . A plurality of floating bodies 17 are arranged along the short side of the float island 3 .

FIG. 5 is a perspective view of the lower half of the floating body 17. FIG. As shown in FIG. 5, the floating body 17 accommodates therein a ballast 20 for adjusting buoyancy. The ballast 20 can be put in and taken out through a ballast hole or the like (not shown) provided in the upper surface 18 (see FIG. 3) of the floating body 17 . In this embodiment, the ballast 20 is water. A bulkhead 21 is formed inside the floating body 17 . The bulkhead 21 is a partition wall that partitions the inside of the floating body 17 into the front, rear, left, and right. The bulkhead 21 preferably extends upward from the bottom to the middle so as to partition at least the lower half of the interior of the floating body 17 .

As shown in FIG. 3 , the windshield 12 is a resin-made hollow structure that suppresses the wind force acting on the solar panel 2 . The windshield 12 has a rectangular shape in plan view and a trapezoidal shape in side view. The windshield 12 has an inclined surface 23 inclined upward toward the float island 3 side. The windshield 12 is preferably supported by the island bumper 11 and arranged along the short side of the float island 3 .

The bumper frame 16, the floating body 17, and the windshield body 12 are fastened together by a plurality of fastening struts 24 extending substantially vertically. The fastening struts 24 should be highly rigid, for example made of metal.

As shown in FIG. 4 , the connecting rope 13 connects the connecting portion 8 of the float island 3 to the bumper frame 16 . The connecting ropes 13 are provided so as to extend in two different directions from each of the connecting portions 8 of the float island 3 . The connecting rope 13 is connected to the end of the bumper frame 16 proximal to the float island 3 . In this embodiment, the connection ropes 13 are connected to the joint points of the truss components of the bumper frame 16 (that is, the points corresponding to the vertices of the triangle).

The mooring ropes 15 are provided so as to extend in a plurality of different directions from each longitudinal end of the bumper frame 16 . The mooring ropes 15 are preferably connected to the junction points of the truss components of the bumper frame 16 (that is, the points corresponding to the vertices of the triangle). A mooring rope 15 is connected to an anchor 14 provided at the bottom of the water, thereby mooring the end mooring device 4a to the bottom of the water. The connection rope 13 and the mooring rope 15 are preferably string-like members with high rigidity. The connecting rope 13 and the mooring rope 15 may be provided as separate members or may be formed as the same member.

Next, the intermediate mooring device 4b will be described with reference to FIG. In the configuration of the intermediate mooring device 4b, the same reference numerals are assigned to the same configurations as those of the end mooring device 4a, and the description thereof is omitted. As shown in FIG. 1, the intermediate mooring device 4b includes an island bumper 11 provided along the short side of each float island 3 between two float islands 3, and a windshield provided above the island bumper 11. It has a body 12, a plurality of connecting ropes 25 connecting the island bumper 11 to the two float islands 3, and a plurality of mooring ropes 15 connecting the island bumper 11 to anchors 14 provided on the bottom of the water.

A connecting rope 25 connects each float island 3 to the island bumper 11, similar to the connecting rope 13 shown in FIG. The connection ropes 25 are provided so as to extend in two different directions from each connection portion 8 (see FIG. 2) of each float island 3 . A connecting rope 25 connects one float island 3 to one side of the island bumper 11 . One side is the side proximal to one floating island 3 . A connecting rope 25 connects the other float island 3 to the other side of the island bumper 11 . The other side is the side proximal to the other floating island 3 . That is, as shown in FIG. 1, the connecting ropes 25 each connect one intermediate mooring device 4b to a pair of float islands 3 adjacent to each other. In this embodiment, the connection ropes 25 are connected to the joint points of the truss constituent members of the bumper frame 16 (that is, the points corresponding to the vertices of the triangle), like the connection ropes 13 shown in FIG. The connection rope 25 is preferably a highly rigid cord-like member. The connecting rope 25 and the mooring rope 15 may be provided as separate members or may be formed as the same member.

The bumper frames 16 (see FIG. 4) of two mooring devices 4 arranged next to each other are connected to each other at their longitudinal ends by bumper connecting ropes 27 . The bumper connecting ropes 27 may be made of the same material as the connecting ropes 13, 25 and the mooring ropes 15, or may be made of a different material.

Although the float island unit 1 includes two float islands 3 and three mooring devices 4 in this embodiment, the present invention is not limited to this. For example, the float island unit 1 may include multiple float islands 3 and multiple moorings 4 . Also, the float island unit 1 only needs to include one float island 3 and two end moorings 4a, in which case the intermediate moorings 4b are omitted.

Next, the effects of the mooring device 4 will be specifically described. As described above, since the float island 3 is a hollow structure made of resin, when the float island 3 sways under the influence of wind, water currents, etc., a large load is applied due to stress concentration due to mooring, and as a result, the float island 3 collapses. There is a risk of damage. The mooring device 4 of the embodiment is provided on the water surface along the outer periphery of the float island 3, and includes an island bumper 11 for buffering stress concentration due to mooring, and a plurality of connecting ropes 13 connecting the island bumper 11 to the float island 3. , 25 and a plurality of mooring ropes 15 connecting the island bumper 11 to anchors 14 provided at the bottom of the water. Therefore, when the floating island 3 is shaken by wind or water flow, the island bumper 11 receives stress caused by mooring. Therefore, the stress concentration on the float island 3 is buffered, and regardless of the strength of the float island 3, the connecting portion 8 of the float island 3 to the mooring device 4 is less likely to break. Moreover, since breakage can be prevented regardless of the strength of the float island 3, the mooring device 4 can be used together with the float island 3 composed of a plurality of solar floats 5 of arbitrary shape or structure.

Moreover, since the stress concentration on the float island 3 is alleviated by providing the island bumper 11, the number of moorings on the float island 3 can be reduced compared to when the island bumper 11 is not provided. Furthermore, when mooring the floating island 3, the floating island 3 is directly moored to the anchor 14 when the island bumper 11 is not provided. In this case, it is difficult to accurately adjust the length of the mooring ropes 15 so as to uniformly generate stress at multiple connection points on the floating island 3 . In the mooring device 4 of the embodiment, the stress is applied to the island bumpers 11 and the number of moorings is reduced. Moreover, since the number of moorings is reduced, the number of anchors 14 used for mooring is reduced, and the cost of the anchors 14 can be reduced.

As shown in FIGS. 1 and 4, mooring ropes 15 are provided extending from each longitudinal end of the island bumper 11 in a plurality of different directions. Connection ropes 13 and 25 are provided so as to extend in a plurality of directions different from each other from each of the plurality of connection portions 8 provided on the float island 3 . Therefore, the float island 3 is moored in a plurality of different directions via the island bumpers 11 . Therefore, the float island 3 is less likely to sway even if it is affected by wind or water currents, and is less likely to receive a load caused by the impact when it sways. Therefore, the connecting portion 8 of the float island 3 with the mooring device 4 is less likely to be damaged. Further, since the island bumper 11 and the float island 3 are connected by the connection ropes 13 and 25 connected to the plurality of connection portions 8, the load applied to each connection portion 8 of the float island 3 is distributed. Therefore, the size of the float island 3 can be increased.

Furthermore, the island bumper 11 includes a bumper frame 16 to which the connecting ropes 13, 25 and the mooring ropes 15 are connected, and a floating body 17 that generates buoyancy. Therefore, the bumper frame 16, which generates stress due to mooring, and the floating body 17, which generates buoyancy, can be made of different members. Therefore, the bumper frame 16 can be made of a highly rigid member, and the floating body 17 can be made of a lightweight member, thereby simultaneously achieving an improvement in rigidity and an improvement in buoyancy. Moreover, when one of the bumper frame 16 and the floating body 17 is damaged, only the damaged member can be replaced.

As shown in FIG. 3, the bumper body of the island bumper 11 includes a bumper frame 16 having a truss structure. Even if a mooring force acts, the truss-structured bumper frame 16 is less likely to deform, so stress is less likely to concentrate on the float island 3 . Therefore, the connecting portion 8 of the float island 3 with the mooring device 4 is less likely to be damaged. Moreover, since the bumper main body can be made lighter, transportation and buoyancy adjustment are easy.

As shown in FIG. 5, the floating body 17 accommodates therein the ballast 20 for buoyancy adjustment so that it can be put in and taken out. By putting in and out the ballast 20, the position (degree of floating, degree of sinking) of the floating body 17 with respect to the water surface can be adjusted. Since the ballast 20 is housed inside, the degree of sinking is increased, so it is less likely to receive wind power and more likely to receive hydraulic power (water resistance), making it less likely to shake.

Furthermore, the ballast 20 is water, and a bulkhead 21 is formed inside the floating body 17 . Therefore, after the floating body 17 is placed in the water in accordance with the mooring position of the float island 3, the buoyancy can be easily adjusted. Moreover, it is easy to take out the ballast 20 when removing the floating body 17 . Furthermore, the water contained inside the floating body 17 is confined in the area defined by the bulkhead 21 . Therefore, even if the floating body 17 is shaken by wind or water flow, the posture can be maintained without the floating body 17 turning over.

Furthermore, the floating body 17 has a pair of vertical surfaces 19 extending substantially vertically proximally and distally with respect to the floating island 3 . Therefore, when the float island 3 is swayed by wind or water currents, resistance is generated between the water outside the floating body 17 and the vertical surface 19, making it difficult for the floating body 17 to move, and the mooring ropes 15 exert an impact on the floating body 17. become smaller. Therefore, the load applied from the mooring rope 15 to the float island 3 via the floating body 17 and the connecting ropes 13 and 25 is reduced.

As shown in FIG. 4 , the mooring device 4 further includes a windshield body 12 that is provided above the bumper frame 16 and that suppresses the wind force acting on the solar panel 2 . Since the windshield 12 prevents the float island 3 supporting the solar panel 2 from shaking due to the wind force, the load applied to the connecting portion 8 of the float island 3 to the mooring device 4 can be reduced. In addition, since the windshield 12 according to the embodiment is arranged on the north side of the float island 3, it suppresses the force of the wind from the north acting on the solar panel 2 which is inclined so that the light receiving surface faces south. easy to do

Further, the windshield 12 has an inclined surface 23 inclined upward toward the float island 3 side. The wind blowing from the side of the windshield 12 toward the side of the float island 3 flows upward by the inclined surface 23. - 特許庁Therefore, the wind force acting on the solar panel 2 supported by the floating island 3 is suppressed. As a result, the float island 3 that supports the solar panel 2 is less likely to sway due to the wind force, so that the load applied to the connection portion 8 of the float island 3 with the mooring device 4 can be reduced.

As shown in FIG. 1, the float island unit 1 includes two float islands 3 closely spaced apart from each other, two end mooring devices 4a arranged on both sides of the float islands 3 in the arrangement direction, and an intermediate mooring device 4b located between two float islands 3 adjacent to each other and connected to both float islands 3 by connecting ropes 25; Since one intermediate mooring device 4b is connected to two float islands 3 arranged on both sides thereof, the number of mooring devices 4 required when mooring multiple float islands 3 can be reduced. Furthermore, the space required for mooring is also reduced, so that the float islands 3 are arranged closer together than if two mooring devices 4 were required for each float island 3. can do. Therefore, more float islands 3 can be arranged within a predetermined area.

In addition, by connecting the island bumpers 11 of the two mooring devices 4 arranged adjacent to each other, the float island 3 arranged between them is less likely to sway even under the influence of wind, water flow, and the like. Therefore, the number of moorings can be reduced compared to when the island bumpers 11 of the two mooring devices 4 arranged adjacent to each other are not connected.

Next, the float island unit 101 according to the second embodiment will be explained. The float island unit 101 according to the second embodiment differs from the float island unit 1 according to the first embodiment shown in FIGS. except that a rope 115 extends from each longitudinal end of the bumper body member. Other parts are the same as in the first embodiment. Below, the configuration of the bumper main body and the mooring rope 115 will be described in detail.

As shown in FIG. 6, the bumper frame 116 of the end anchoring device 4a is divided into a plurality of bumper frame members 116a. The bumper frame 116 constitutes a bumper body of the island bumper 11, and the bumper frame member 116a constitutes a bumper body member of the bumper body. Mooring ropes 115 are provided so as to extend in a plurality of different directions from each longitudinal end of the bumper frame member 116a. A mooring rope 115 is connected to an anchor 14 provided at the bottom of the water, thereby mooring the end mooring device 4a to the bottom of the water. The connection rope 13 and the mooring rope 115 are preferably string-like members with high rigidity. The connecting rope 13 and the mooring rope 115 may be provided as separate members or may be formed as the same member.

As noted above, bumper frame 116 is divided into a plurality of bumper frame members 116a. This facilitates transportation of the bumper frame 116 . Therefore, construction of the mooring device 4 is facilitated. Also, by dividing the bumper frame 116 into a plurality of bumper frame members 116a, the overall size of the bumper frame 116 can be increased. Therefore, a large float island 3 can be moored.

Next, the float island unit 201 according to the third embodiment will be explained. The float island unit 201 according to the third embodiment differs from the float island unit 101 according to the second embodiment shown in FIG. , in that the bumper connection rope 27 is connected to the anchor 14 by the auxiliary mooring rope 215 . Other parts are the same as in the second embodiment. In the following, the auxiliary connection rope 213 and the auxiliary mooring rope 215 will be described in detail, and other parts will be denoted by the same reference numerals as in the second embodiment, and description thereof will be omitted.

As shown in FIG. 7, connecting portions 8 are provided at each end of the elongated bridge 6 in the east-west direction. In this embodiment, the connecting portion 8 is a through hole. The connecting portion 8 is connected to the bumper connecting rope 27 by an auxiliary connecting rope 213 . The auxiliary connection ropes 213 are provided so as to extend in a plurality of directions different from each other from each of the connection portions 8 . The bumper connection ropes 27 are connected by auxiliary mooring ropes 215 to a plurality of anchors 14 provided on the bottom of the water. The auxiliary mooring rope 215 is preferably provided so as to extend outward substantially parallel to the longitudinal direction of the island bumper 11 from the connection point between the auxiliary connection rope 213 and the bumper connection rope 27 .

The float island 3 is connected to the anchor 14 via the auxiliary connecting ropes 213, the bumper connecting ropes 27 and the auxiliary mooring ropes 215, as described above. As a result, the float island 3 is further moored on its east and west sides. Therefore, the float island 3 is less likely to swing in the longitudinal direction of the island bumper 11 (that is, in the east-west direction). Therefore, the load applied to the connection portion 8 of the float island 3 with the island bumper 11 can be reduced.

Although the specific embodiments have been described above, the present invention is not limited to the above-described embodiments and modifications, and can be widely modified. For example, although the float island 3 and the mooring device 4 are arranged in the north-south direction in the above embodiment, the float island 3 and the mooring device 4 may be arranged in the east-west direction. In the above embodiment, the bumper body is the bumper frame 16 having a truss structure, but the bumper body may be a single pipe and a scaffolding board. In the above embodiment, the mooring device 4 is moored to the anchor 14 provided on the bottom of the water, but the mooring device 4 may be moored to the anchor 14 provided on land. Furthermore, the float island unit 1 may be made movable by using an anchor 14 provided on land together with a winch. Moreover, the mooring device 4 may be further equipped with a device having a shock absorbing function. In addition, the specific configuration, arrangement, quantity, material, etc. of each member and portion can be changed as appropriate within the scope of the present invention. On the other hand, not all of the components shown in the above embodiments are essential, and can be selected as appropriate.

REFERENCE SIGNS LIST 1: Float island unit according to the first embodiment 2: Solar panel 3: Float island 4: Mooring device 4a: End mooring device 4b: Intermediate mooring device 5: Solar float 8: Connection part 11: Island bumper 12: Windshield body 13: Connection rope 14: Anchor 15: Mooring rope 16: Bumper body (bumper frame)
17: Floating body 19: Vertical surface 20: Ballast 21: Bulkhead 23: Inclined surface 25: Connection rope 27: Bumper connection rope
101: Float island unit according to the second embodiment 116: Bumper body (bumper frame)
116a: Bumper body member (bumper frame member)
201: Float island unit according to the third embodiment 213: Auxiliary connecting rope 215: Auxiliary mooring rope

Claims (12)

A mooring system for a floating island with a plurality of solar floats supporting solar panels above water, comprising:
an island bumper provided on the water surface along the outer periphery of the float island for buffering stress concentration due to mooring;
a plurality of connecting ropes connecting the island bumper to the floating island;
and a plurality of mooring ropes connecting said island bumpers to anchors provided on the bottom of the water. The mooring ropes are provided to extend in a plurality of directions different from each other from each longitudinal end of the island bumper,
The mooring device according to claim 1, wherein the connecting ropes are provided so as to extend in a plurality of directions different from each other from each of a plurality of connecting portions provided on the float island. The mooring device according to claim 1, wherein the island bumper includes a bumper body to which the connection rope and the mooring rope are connected, and a floating body that generates buoyancy. 4. The mooring system of claim 3, wherein the bumper body includes a bumper frame having a truss structure. The mooring device according to claim 3 or 4, wherein the floating body accommodates ballast for adjusting buoyancy so that it can be put in and taken out. The mooring device according to claim 5, wherein the ballast is water, and a bulkhead is formed inside the floating body. 7. A mooring device according to claim 5 or claim 6, wherein the floating body has a pair of vertical surfaces extending substantially vertically proximally and distally with respect to the floating island. The mooring device according to any one of claims 3 to 6, further comprising a windshield provided above the bumper body for suppressing wind force acting on the solar panel. 9. A mooring device according to claim 8, wherein the windshield has a sloping surface sloping upwards toward the float island. The mooring device according to any one of claims 3 to 9, wherein the bumper body is divided into a plurality of bumper body members. A float island unit comprising at least one mooring device according to any one of claims 1 to 10 and at least one float island according to any one of claims 1 to 10,
at least one float island includes a plurality of float islands closely spaced apart from each other;
At least one of said mooring devices is arranged between two end mooring devices arranged on both sides of said float island in the arrangement direction and a pair of said float islands adjacent to each other, and is connected to both float islands by connecting ropes. a floating island unit including a connected intermediate mooring system; A float island unit comprising at least one mooring device according to any one of claims 1 to 10 and at least one float island according to any one of claims 1 to 10,
at least one of said mooring devices comprises a plurality of mooring devices positioned on opposite sides of said floating island;
Each longitudinal end of each of the island bumpers is connected to each other by a bumper connection rope,
Auxiliary connection ropes extending in a plurality of directions different from each other from each of a plurality of connection portions provided on the float island are connected to the bumper connection rope,
A float island unit wherein said bumper connecting ropes are connected to a plurality of anchors provided on the bottom by a plurality of auxiliary mooring ropes.

Images