Floating body structure

Abstract

A floating body structure (100) has a posture in which a mooring facility (110) having a plurality of mooring columns (111) is positioned on the side of a floating body center line (C), and has a plurality of first mooring lines (61) and a plurality of second mooring lines (62) connected to a plurality of mooring columns positioned on the side of the side surface (6), wherein portions of the plurality of first mooring lines positioned on the outside of a floating body main body 1 extend from the floating body main body (1) toward a first-direction (D1) side at the time of mooring, portions of the plurality of second mooring lines positioned on the outside of the floating body main body extend from the floating body main body toward a second-direction side at the time of mooring, and the total number of the first mooring lines and the second mooring lines is at least five.

Description

Floating structures

[0001] The present invention relates to a floating structure.

[0002] BACKGROUND ART Ships equipped with mooring devices have been known in the past (see, for example, Patent Document 1).

[0003] This mooring device can pay out a total of four ropes, two from each of the bow mooring device and the stern mooring device, as mooring lines to prevent movement in the fore-and-aft direction, i.e., ropes extending from the bow to the stern and ropes extending from the stern to the bow in the bow-stern direction.

[0004] Japanese Patent Application Laid-Open No. 2006-213515

[0005] However, for floating structures that are easily affected by wind, four ropes may not provide enough mooring force to stop forward and backward movement.

[0006] In order to solve the above-mentioned problems, a floating structure according to one aspect of the present disclosure is a floating structure that, when moored, takes a posture in which mooring equipment having a plurality of mooring bollards is located on the side of a floater centerline extending horizontally, and has a side surface and a plurality of first mooring lines and a plurality of second mooring lines connected to the plurality of mooring bollards located on the side of the side surface, and when one of the directions in which the floater centerline extends is defined as a first direction and the other as a second direction, the floating structure has a floating body and drums that are provided corresponding to the plurality of first mooring lines and that wind up the first mooring lines. and a second drum group including a plurality of drums each corresponding to a plurality of the second mooring lines and winding up the second mooring lines, wherein when moored, the portions of the first mooring lines located outside the floating body extend from the floating body in the first direction, and when moored, the portions of the second mooring lines located outside the floating body extend from the floating body in the second direction, and a total of at least five first mooring lines and second mooring lines.

[0007] In order to solve the above problem, a floating structure according to another aspect of the present disclosure is a floating structure that, when moored, takes a posture in which mooring equipment having a plurality of mooring bollards is located to the side of a floater centerline extending horizontally, and has a side surface, and one or more first mooring lines, one or more second mooring lines, and one or more third mooring lines connected to the plurality of mooring bollards located to the side of the side surface, and when one of the directions in which the floater centerline extends is defined as a first direction and the other as a second direction, the floating structure includes: an end region whose outer edge extends and curves inward, and a deck in which the first region and the first region are aligned in the direction in which the floater centerline extends; a first drum group including one or more drums for winding up the first mooring lines; a second drum group including a plurality of drums for winding up the second mooring lines; and a third drum group including one or more drums for winding up the third mooring lines, and and a third mooring line lead-out group including one or more mooring line lead-out portions that define an exit of the third mooring line from the floating body, wherein, when moored, a portion of the first mooring line located outside the floating body extends from the floating body toward the first direction, and when moored, a portion of the second mooring line located outside the floating body extends from the floating body toward the second direction, and when moored, the third mooring line takes one of a first attitude in which the portion located outside the floating body extends from the floating body toward the first direction, and a second attitude in which the portion located outside the floating body extends from the floating body in a direction perpendicular to a direction in which the floater centerline extends from the floating body or in the second direction, and the third exit is such that an angle formed between a tangent to an outer edge of the end region that passes through the third exit and the floater centerline is greater than or equal to 0 degrees and less than 45 degrees. and the total number of the first mooring line, the second mooring line and the third mooring line is at least five.

[0008] In order to solve the above-mentioned problems, a floating structure according to another aspect of the present disclosure is a floating structure that, when moored, takes a posture in which mooring equipment having a plurality of mooring bollards is located on the side of a floater centerline extending horizontally, and has a side surface and one or more first mooring lines, one or more second mooring lines, and one or more third mooring lines connected to the plurality of mooring bollards located on the side of the side surface, and when one of the directions in which the floater centerline extends is defined as a first direction and the other as a second direction, the end region and the first region are located in the direction in which the floater centerline extends. a floating body including a deck arranged in a line; a first drum group including a plurality of drums for winding up the first mooring line; a second drum group including a plurality of drums for winding up the second mooring line; a third drum group including one or more drums for winding up the third mooring line; a third mooring line lead-out group located in the end region and provided corresponding to each of the drums in the third drum group, and including one or more mooring line lead-out portions that define an exit of the third mooring line from the floating body; and a fourth mooring line lead-out group including one or more mooring line lead-out portions corresponding to the first mooring line and defining an exit of the third mooring line from the floating body, wherein a portion of the first mooring line located outside the floating body when moored extends from the floating body in the first direction, a portion of the second mooring line located outside the floating body when moored extends from the floating body in the second direction, and a portion of the third mooring line located outside the floating body when moored extends from the floating body in the The portion located outside the floating body takes one of a first attitude extending toward the first direction and a second attitude extending in a direction perpendicular to the direction in which the floating body center line extends from the floating body or in the second direction, the third outlet is an outlet from the floating body of the third mooring line taking the second attitude, the fourth outlet is an outlet from the floating body of the third mooring line taking the first attitude, and the total number of the first mooring line, the second mooring line and the third mooring line is at least five.

[0009] The present invention has the effect of increasing the mooring force that restrains the movement of the floating structure in the fore-and-aft direction, thereby achieving safe mooring specifications.

[0010] Fig. 1 is a plan view showing a configuration example of a floating body structure according to embodiment 1. Fig. 2 is an enlarged plan view of a main part of the bow side portion of a floating body structure according to embodiment 3. Fig. 3 is a plan view showing the positional relationship between a drum, a mooring line guide-out portion, and a roller of a floating body structure according to embodiment 3. Fig. 4 is an enlarged plan view of a main part of the bow side portion of a floating body structure according to embodiment 4. Fig. 5 is an enlarged plan view of a main part of the bow side portion of a floating body structure according to embodiment 5.

[0011] Hereinafter, embodiments will be described with reference to the drawings. Note that the present invention is not limited to the following embodiments. In addition, the same or corresponding elements will be denoted by the same reference numerals throughout the drawings, and redundant description will be omitted.

[0012] First Embodiment FIG. 1 is a plan view showing a configuration example of a floating structure 100 according to a first embodiment.

[0013] As shown in Fig. 1 , the floating structure 100 is a ship. Instead of a ship, the floating structure 100 may be a floating production storage and offloading unit (FPSO), a floating LNG storage and regasification unit (FSRU), a floating production and offloading unit (FPO), a floating storage and offloading unit (FSO), or the like. In this embodiment, the floating structure 100, which is a ship, is a liquefied gas carrier that transports liquefied gas, but is not limited to a liquefied gas carrier.

[0014] The floating structure 100 comprises a floating body 1 which is a hull, one or more tanks 2 for storing liquefied gas as cargo, a living area 3, and mooring equipment 8 for mooring the floating structure 100 to mooring equipment 110 provided on a quay or the like. The tanks 2 are, for example, spherical tanks, and protrude significantly upward from a deck 5 described below.

[0015] The mooring facility 110 has a plurality of mooring posts 111. When moored, the center line of the floating structure 100, which extends horizontally from bow to stern parallel to the quay wall 101, forms the floater center line C. The floating structure 100 is then moored alongside the quay wall 101 so that the plurality of mooring posts 111 of the mooring facility 110 are positioned to the sides of the floater center line C, and is moored using mooring lines, which are ropes also called hawsers. When moored, some of the plurality of mooring posts 111 are positioned to the sides of the side surface 6, facing the side surface 6. Hereinafter, one of the directions in which the floater center line C extends, that is, the direction from bow to stern, may be referred to as the stern direction D1. The stern direction D1 may be referred to as the first direction D1. Furthermore, the other direction in which the floater center line C extends, that is, the direction from stern to bow, may be referred to as the bow direction D2. The bow direction D2 can be rephrased as the second direction D2.

[0016] The main mooring lines used to moor the floating structure 100 include a header line 64, a stern line 66, a breast line 65, and a spring line 60. The mooring lines have a loop at the end, and are fastened to the mooring post 111 using this loop.

[0017] The header line 64 is a mooring rope whose portion located outside the floating body 1 when moored extends diagonally forward from the bow of the floating body 1 toward the quay 101 and is connected to a mooring post 111 located forward of the bow of the floating body 1 in the extension direction of the float centerline C. In this way, the header line 64 restrains movement of the bow of the floating body 1 in the ship's width direction, i.e., in the direction of leaving the quay.

[0018] The stern line 66 is a mooring rope whose portion located outside the floating body 1 when moored extends diagonally rearward from the stern of the floating body 1 toward the quay 101 and is connected to a mooring post 111 located rearward of the stern of the floating body 1 in the direction of extension of the float centerline C. In this way, the stern line 66 restrains movement of the stern of the floating body 1 in the ship's width direction, i.e., in the direction toward leaving the quay.

[0019] The breast line 65 is a mooring rope whose portion located outside the floating body 1 when moored extends from the floating body 1 toward the quay 101 in a direction generally perpendicular to the floater center line C, i.e., in the width direction of the ship, and is connected to the mooring bollard 111. The breast line 65 is connected to the mooring bollard 111 so that the angle it forms with the floater center line C is at least approximately greater than 45 degrees. In this way, the breast line 65 restrains movement of the floating body 1 in the width direction of the ship, i.e., in the direction toward leaving the quay.

[0020] The spring lines 60 are used in pairs, with one or more first mooring lines 61 on the bow side and one or more second mooring lines 62 on the stern side. When mooring, the first mooring lines 61 are mooring lines whose portions located outside the floating body 1 extend in the stern direction D1 from a portion of the floating body 1 closer to the bow toward the quay 101 and are connected to mooring posts 111 located on the sides of the side surfaces 6. The first mooring lines 61 are connected to the mooring posts 111 so that their angles with the float center line C are approximately 45 degrees or less. This prevents the first mooring lines 61 from moving in the bow direction D2. When mooring, the second mooring lines 62 are mooring lines whose portions located outside the floating body 1 extend in the bow direction D2 from a portion closer to the stern than the first mooring lines 61 toward the quay 101 and are connected to mooring posts 111 located on the sides of the side surfaces 6. The second mooring line 62 is connected to the mooring post 111 so that the angle between the second mooring line 62 and the float center line C is approximately 45 degrees or less. As a result, the second mooring line 62 restrains the movement of the float body 1 toward the stern direction D1.

[0021] The floating body 1 includes a deck 5 and left and right side surfaces 6, i.e., port and starboard sides. The deck 5 is not limited to an exposed deck, but may be an internal deck provided inside the floating body 1. The side surfaces 6 include a port side surface and a starboard side surface. The deck 5 includes an end region 50, a first region 51, and a second region 52.

[0022] The second region 52 is located on the stern side, crosses the deck 5, and extends in the direction of the floater centerline C. The second region 52 is the region where the second mooring line lead-out group 25, which will be described later, is located. The second region 52 includes a pair of left and right outer edges 57 that extend parallel to the floater centerline C.

[0023] The first region 51 is located closer to the bow direction D2 than the second region 52, and extends across the deck 5 in the direction of the floater centerline C. The first region 51 is the region where the first mooring line lead-out group 15, which will be described later, is located. The first region 51 and the second region 52 are arranged at a distance from each other in the direction of the floater centerline C. The first region 51 includes a pair of left and right outer edges 56 that extend parallel to the floater centerline C.

[0024] The end region 50 is a region located on the bow direction D2 side of the first region 51, and is a region that crosses the deck 5. In this embodiment, the end region 50 is a bow deck region located in the bow portion, and is a region adjacent to the first region 51. The end region 50 includes a pair of left and right outer edges 55 that extend and curve inward.

[0025] In this way, the end region 50, the first region 51, and the second region 52 are aligned in the direction in which the floater centerline C extends, in the order of the end region 50, the first region 51, and the second region 52. More specifically, the end region 50, the first region 51, and the second region 52 are aligned in this order in the stern direction D1.

[0026] The left and right side surfaces 6 are the sides of the float body 1 that extend downward from the outer edge 57 of the second region 52 , the outer edge 56 of the first region 51 , and the outer edge 55 of the end region 50 .

[0027] The accommodation area 3 has a wheelhouse where the crew performs operations such as steering the ship. The accommodation area 3 is located in the first area 51 or the end area 50, and is located closer to the bow than the tanks 2. This prevents the tanks 2, which protrude significantly upward from the deck 5, from obstructing visibility, and allows the height of the accommodation area 3 to be kept low, making it possible to make the accommodation area 3 compact. Note that structures such as accommodation areas, engine room casings, and cargo equipment rooms may be provided on the stern side, i.e., on the deck 5 aft of the tanks 2.

[0028] The mooring equipment 8 has, as mooring equipment for the spring line 60, a mooring machine 9A, a mooring machine 9B, and a first mooring line lead-out group 15 and a second mooring line lead-out group 25 including mooring line lead-outs such as chocks and fairleads. The mooring equipment 8 may also include a first mooring line 61 and a second mooring line 62 which are spring lines 60. In this embodiment, the mooring machine 9A, the mooring machine 9B, the first mooring line lead-out group 15, and the second mooring line lead-out group 25 are provided in pairs symmetrically on each of the port and starboard sides of the floating body main body 1, so as to be symmetrical with respect to the floater centerline C, and when mooring, the equipment on the mooring side is used.

[0029] The mooring devices 9A and 9B are hawser drums and include elements that are included in well-known hawser drums, such as a drum, a drive shaft, a clutch, a brake, etc. In the following, explanations of elements related to each mooring device other than the drum and the drive shaft will be omitted.

[0030] The mooring device 9A includes a first drum group 11 including a plurality of first drums 12 and a drive shaft 13. The mooring device 9A is preferably provided in the first area 51 or near the first area 51. The plurality of first drums 12 are horizontal drums that rotate around a horizontally extending rotation axis and are fitted to a horizontally extending drive shaft 13. The drive shaft 13 is rotationally driven, for example, by a hydraulic drive source, and transmits driving force to the plurality of first drums 12. In the driving force transmission path from the drive shaft 13 to the first drums 12, a clutch is provided between the drive shaft 13 and each first drum 12 to switch the driving force transmission state. By engaging the clutch, the driving force is transmitted from the drive shaft 13 to the corresponding first drum 12, causing the first drum 12 to rotate. By disengaging the clutch, the driving force is no longer transmitted from the drive shaft 13 to the corresponding first drum 12, and the first drum 12 becomes rotatable. When activated, the brake applies a brake to the first drum 12, which is now freely rotatable. The first drums 12 are flanged drums provided corresponding to the first mooring lines 61, respectively, and wind up the corresponding first mooring lines 61. In this embodiment, the first drum group 11 includes three first drums 12, and can wind up a total of three first mooring lines 61. The drive shaft 13 transmits driving force to the three first drums 12.

[0031] The mooring device 9B includes a second drum group 21 including a plurality of second drums 22 and a drive shaft 23. The mooring device 9B is preferably provided in or near the second area 52. The plurality of second drums 22 are provided corresponding to the plurality of second mooring lines 62, respectively, and are drums that reel in the corresponding second mooring lines 62. In this embodiment, the second drum group 21 includes three second drums 22 and can reel in a total of three second mooring lines 62. The remaining features of the second drum group 21 are similar to those of the first drum group 11, and therefore will not be described in detail.

[0032] The first mooring line lead-out group 15 includes a plurality of first mooring line lead-outs 16. The plurality of first mooring line lead-outs 16 are located on the outer edge 56 of the first region 51 and are provided to correspond to the plurality of first drums 12 of the first drum group 11, respectively. That is, in this embodiment, the first mooring line lead-out group 15 has three first mooring line lead-outs 16. The first mooring line lead-outs 16 define first outlets 17, which are outlets of the first mooring lines 61 from the floating body main body 1. The first drums 12 corresponding to the first mooring line lead-outs 16 are located at positions where the fleet angle is within 10 degrees. The first drums 12 corresponding to the first mooring line lead-outs 16 are located so that the first outlets 17 pass through the center of the first drums 12 in the direction in which the rotation axis of the first drums 12 extends and are located on the drum center line perpendicular to the rotation axis of the first drums 12.

[0033] The second mooring line lead-out group 25 includes a plurality of second mooring line lead-outs 26. The plurality of second mooring line lead-outs 26 are located on the outer edge 57 of the second region 52 and are provided corresponding to the plurality of second drums 22 of the second drum group 21, respectively. That is, in this embodiment, the second mooring line lead-out group 25 has three second mooring line lead-outs 26. The second mooring line lead-outs 26 define second outlets 27, which are outlets of the second mooring lines 62 from the floating body main body 1. The second drums 22 corresponding to the second mooring line lead-outs 26 are located at positions where the fleet angle is within 10 degrees. The second drums 22 corresponding to the second mooring line lead-outs 26 are located so that the second outlets 27 pass through the centers of the second drums 22 in the direction in which the rotation axes of the second drums 22 extend and are located on the drum center line perpendicular to the rotation axis of the second drums 22.

[0034] In this way, the first mooring line 61 is fastened to the mooring equipment 110 of the floating structure 100 through the first outlet 17 located at the outer edge 56 extending parallel to the float centerline C of the first region 51, and the second mooring line 62 is fastened to the mooring equipment 110 of the floating structure 100 through the second outlet 27 located at the outer edge 57 extending parallel to the float centerline C of the second region 52. This prevents the first mooring line 61 and the second mooring line 62 from rubbing against the floating body main body 1. Furthermore, because the first mooring line 61 and the second mooring line 62 exit to the outside of the floating body main body 1 through the first outlet 17 and the second outlet 27, the first mooring line 61 and the second mooring line 62 can take a fixed path within the floating body main body 1 regardless of the position of the mooring bollard 111.

[0035] In this way, the mooring equipment 8 is capable of paying out a total of six spring lines as the spring lines 60: three first mooring lines 61 and three second mooring lines 62.

[0036] Next, an example of a procedure for tying the spring lines 60 to the mooring bollards 111 during mooring work will be described. In mooring work according to this embodiment, an operator pays out the spring lines 60 one by one, tying a total of six spring lines 60 to the mooring bollards 111 located to the sides of the side surface 6. When tying the first mooring line 61 of the spring lines 60 to the mooring bollard 111, the operator first disengages the clutch of the first mooring line 61 to be paid out, releases the brake, and makes the first drum 12 rotatable. The operator then brings the tip of the first mooring line 61 out of the floating body main body 1 through the first exit 17. The operator then throws a guide rope attached to the tip of the first mooring line 61 onto the quay 101, for example, and another operator waiting at the quay 101 reels in the guide rope, thereby tying the tip of the first mooring line 61 to the quay 101. Then, a worker on the quay 101 side ties the tip of the first mooring line 61 to a mooring bollard 111 located to the side of the side surface 6. Once the first mooring line 61 is tied to the mooring bollard 111, the clutch of the corresponding first drum 12 is engaged, and the drive shaft 13 is rotated in a direction that pulls the first mooring line 61 toward the floating body 1, thereby rotating the first drum 12. As a result, the first mooring line 61 is wound around the first drum 12. In a taut state, the first mooring line 61 extends in a straight line from the first drum 12 toward the first outlet 17, and is bent at the first outlet 17, so that the portion located outside the floating body 1 extends in a straight line from the portion of the floating body 1 closer to the bow toward the quay 101 in the stern direction D1. Then, when the worker determines that an appropriate tension is acting on the first mooring line 61, he fastens the first mooring line 61 to a mooring post 111 such as a bollard provided on the floating body main body 1, disengages the clutch, and activates the brake. The other first mooring lines 61 are similarly tied to the mooring posts 111. The three first mooring lines 61 may be tied to the same mooring post 111, or some or all of the first mooring lines 61 may be tied to different mooring posts 111.

[0037] When the second mooring line 62 is connected to the mooring bollard 111, the tip of the second mooring line 62 is brought out from the second outlet 27 to the outside of the floating body 1, and when stretched, the second mooring line 62 extends in a straight line from the second drum group 21 toward the second outlet 27, and is bent at the second outlet 27, so that the part located outside the floating body 1 extends in a straight line in the bow direction D2 from the part of the floating body 1 closer to the stern toward the quay 101. In all other respects, the method is the same as when the first mooring line 61 is connected to the mooring bollard 111.

[0038] In this way, in the mooring machine 9, one drive shaft 13, 23 transmits driving force to multiple drums. This simplifies the configuration for driving the first drum group 11 and the second drum group 21, and the mooring force that restrains the movement of the floating structure 100 in the fore-and-aft direction can be increased with a simple configuration.

[0039] The mooring procedures using the header line 64, breast line 65 and stern line 66 are similar to those for the spring line 60 or are well known procedures, so explanations will be omitted.

[0040] As described above, the floating structure 100 has a total of six first mooring lines 61 and second mooring lines 62, which is five or more, and the movement of the floating structure 100 in the bow-stern direction is restrained by a total of five or more spring lines 60. This makes it possible to increase the mooring force that restrains the movement of the floating structure 100 in the bow-stern direction, and to obtain safe mooring specifications.

[0041] The floating structure 100, which is a liquefied gas carrier, tends to have a low specific gravity of cargo and a large freeboard, and is therefore susceptible to the effects of wind. The floating structure 100 has a total of five or more first mooring lines 61 and second mooring lines 62, and a total of five or more spring lines 60 restrain the ship from moving in the fore-and-aft direction. This allows for a large mooring force and ensures safe mooring specifications.

[0042] Furthermore, the floating structure 100, which is an independent tank type liquefied gas carrier with accommodations 3 provided in the first area 51 or the end area 50, which is the bow deck area, is susceptible to significant influences from the bow-stern direction. A total of five or more first mooring lines 61 and second mooring lines 62 are provided, and a total of five or more spring lines 60 are used to restrain the vessel from moving in the fore-and-aft direction. This provides a large mooring force and ensures safe mooring specifications.

[0043] (Embodiment 2) In the above-described embodiment 1, the total number of the first mooring lines 61 and the second mooring lines 62 is six, but this is not limited to this. Alternatively, the total number of the first mooring lines 61 and the second mooring lines 62 may be five. For example, there may be three first mooring lines 61 and two second mooring lines 62. In this case, the number of second drums 22 in the second drum group 21 and the number of second mooring line lead-out sections 26 in the second mooring line lead-out section group 25 corresponding to the second mooring lines 62 may also be two. Similarly, there may be two first mooring lines 61 and three second mooring lines 62. Furthermore, the total number of the first mooring lines 61 and the second mooring lines 62 is not limited to five or six. The total number of the first mooring lines 61 and the second mooring lines 62 may be seven or more.

[0044] (Embodiment 3) Fig. 2 is an enlarged view of a main part of the bow side of a floating structure 300 according to Embodiment 3. Hereinafter, Embodiment 3 will be described. Embodiment 3 differs from Embodiment 1 in the configuration of the first drum group and in that rollers 71 are provided.

[0045] As shown in FIG. 2 , in the third embodiment, the floating structure 300 has mooring machines 309A1 and 309A2 as mooring machines of the mooring equipment related to the spring line 60. The mooring machine 309A1 includes two first drums 12 and a drive shaft 13. The mooring machine 309A2 includes one first drum 12 and a drive shaft 13. A total of three first drums 12, including the mooring machines 309A1 and 309A2, form the first drum group 11. The drive shafts 13 of the mooring machines 309A1 and 309A2 extend in the bow-stern direction. As such, in the present embodiment, some of the three first drums 12 included in the first drum group 11 are driven by different drive shafts 13.

[0046] 3 is a diagram showing the positional relationship between one first drum 12 of the mooring device 309A1, the roller 71, and the first outlet 17. As shown in FIG. 3, among the first drums 12 corresponding to the first mooring line lead-out section 16, the first drum 12 of the mooring device 309A1 is not positioned so that the corresponding first outlet 17 is located on the drum center line L of the first drum 12. On the other hand, the roller 71 is positioned on the drum center line L of the first drum 12. The roller 71 guides the first mooring line 61 passing through the first outlet 17 toward at least one first drum 12 of the first drum group 11, and is positioned so that the fleet angle θf with respect to the first drum 12 is within 10 degrees. This allows for design flexibility in the arrangement of the first drum group 11 that reel in the mooring line passing through the first outlet 17.

[0047] In this way, the first drums 12 of the first drum group 11 may be driven by multiple mooring machines. Similarly, the second drums 22 of the second drum group 21 may be driven by multiple mooring machines.

[0048] (Fourth embodiment) Fig. 4 is an enlarged view of a main part of a bow side portion of a floating structure 400 according to a fourth embodiment. The fourth embodiment will be described below, focusing on the differences from the first embodiment.

[0049] In the fourth embodiment, as shown in Fig. 4, the mooring equipment 8 has, as mooring equipment for the spring line 60, a mooring machine 409A, the mooring machine 9B shown in Fig. 1, a mooring machine 409C, a first mooring line guide-out group 415, the second mooring line guide-out group 25 shown in Fig. 1, a third mooring line guide-out group 35, a fourth mooring line guide-out group 45, and a second roller 72. The mooring machine 9B and the second mooring line guide-out group 25 are configured in the same way as in the first embodiment.

[0050] In this embodiment, in addition to the first mooring line 61 and the second mooring line 62, a third mooring line 63 is used to moor the floating structure 400. The third mooring line 63 serves as a spring line 60, and when moored, the portion located outside the floating body 1 extends from the bow-side portion of the floating body 1 toward the quay 101 in the stern direction D1, and can be connected to a mooring post 111 located to the side of the side surface 6. Furthermore, the third mooring line 63 serves as a breast line 65, and when moored, the portion located outside the floating body 1 extends from the floating body 1 toward the quay 101 in a direction perpendicular to the float centerline C, i.e., in the width direction, and can be connected to a mooring post 111 located to the side of the side surface 6 of the floating body 1 in the direction of extension of the float centerline C.

[0051] The mooring machine 409A includes a first drum group 11 including two first drums 12, and a drive shaft 13. The first mooring line guide-out group 415 includes two first mooring line guide-outs 16. Other configurations of the mooring machine 409A and the first mooring line guide-out group 415 are the same as those of the mooring machine 9A and the first mooring line guide-out group 15 of the first embodiment.

[0052] The mooring machine 409C includes a third drum group 31 including a third drum 32. The third drum 32 is a flanged drum provided corresponding to the third mooring line 63 and winds up the third mooring line 63. The third drum 32 has a rotation axis extending in the same direction as the floater's centerline C. The third drum group 31 is located on or near the floater's centerline C, and can selectively extend the third mooring line 63 to either the port side or the starboard side.

[0053] The third mooring line lead-out group 35 includes a third mooring line lead-out 36. The third mooring line lead-out group 35 is located on the outer edge 55 of the end region 50 and is provided corresponding to the third drum 32 of the third drum group 31. The third mooring line lead-out 36 defines a third exit 37, which is an exit of the third mooring line 63 from the floater body 1. The third drum 32 corresponding to the third mooring line lead-out 36 is located at a position where the fleet angle is within 10 degrees. Furthermore, the third drum 32 corresponding to the third mooring line lead-out 36 is located so that the third exit 37 is located on the drum center line.

[0054] The fourth mooring line lead-out group 45 includes a fourth mooring line lead-out 46. The fourth mooring line lead-out group 45 is located on the outer edge 56 of the first region 51, and is provided corresponding to the third drum 32 of the third drum group 31. The fourth mooring line lead-out 46 defines a fourth exit 47, which is an exit of the third mooring line 63 from the floating body body 1. The third drum 32 corresponding to the third mooring line lead-out 36 has a second roller 72 located on the drum centerline of the third drum 32.

[0055] The second roller 72 is located on the deck 5 and guides the third mooring line 63 passing through the fourth exit 47 toward the third drum 32. The second roller 72 is located at a position where the fleet angle with respect to the third drum 32 is within 10 degrees.

[0056] In this way, the third mooring line 63 can be led out of the floating body 1 from one of the third exit 37 and the fourth exit 47 .

[0057] The mooring device 409A, the third mooring line lead-out group 35, and the fourth mooring line lead-out group 45 are provided in pairs symmetrically with respect to the floater centerline C. Furthermore, the third drum 32 of the mooring device 409C is a drum whose rotation axis extends in the direction of the floater centerline C. Therefore, the third mooring line 63 can be let out from the upper side of the third drum 32 to one side in the ship's width direction, and the third mooring line 63 can be let out from the lower side of the third drum 32 to the other side in the ship's width direction. This allows the mooring line to be selectively let out from the third drum 32 to the port side and the starboard side. Therefore, there is no need to provide mooring devices 409C on both the port side and the starboard side, and the mooring force that restrains the movement of the floating structure 400 in the fore-and-aft direction can be increased with a simple configuration.

[0058] When the third mooring line 63 is used as a spring line, the third mooring line 63 can be pulled out from the floating body 1 through the fourth outlet 47 and tied to a mooring post 111 located on the side of the side surface 6. When the third mooring line 63 is tensioned, the third mooring line 63 extends in a straight line from the third drum 32 toward the second roller 72, is bent by the second roller 72, and extends in a straight line from the second roller 72 toward the fourth outlet 47. The third mooring line 63 then assumes a first position in which the portion located outside the floating body 1 extends in the stern direction D1 from the fourth outlet 47 located near the bow of the floating body 1 toward the quay 101. In other words, the fourth outlet 47 is the outlet from which the third mooring line 63 in the first position leaves the floating body 1.

[0059] When the third mooring line 63 is used as a breast line, the third mooring line 63 can be brought out from the third outlet 37 to the outside of the floating body 1 and tied to a mooring post 111 located laterally on the side surface 6 of the floating body 1 in the direction of extension of the floater's centerline C. When the third mooring line 63 is tensioned, the third mooring line 63 extends in a straight line from the third drum 32 toward the third outlet 37, and takes a second posture in which the portion located outside the floating body 1 extends from the floating body 1 toward the quay 101 in a direction perpendicular to the floater's centerline C, i.e., in the ship's width direction. In other words, the third outlet 37 is the exit of the third mooring line 63 from the floating body 1 in the second posture.

[0060] The third mooring line 63 can also be used as the header line 64. When the third mooring line 63 is used as the header line 64, the portion of the third mooring line 63 located outside the floating body 1 extends from the floating body 1 toward the bow direction D2.

[0061] Furthermore, the path of the third mooring line 63 extending toward the third exit 37 and the path of the third mooring line 63 extending toward the fourth exit 47 can be switched using the second roller 72, allowing for design freedom in the arrangement of the third drum group 31 that winds up the third mooring line 63 that selectively passes through one of the third exit 37 and the fourth exit 47.

[0062] In this way, the floating structure 400 can repurpose at least a part of the third mooring line 63, which can be used as a breast line, as the spring line 60. Therefore, the floating structure 400 has at least five first mooring lines 61, second mooring lines 62, and third mooring lines 63, which can be used as spring lines 60. The floating structure 400 can be moored by five or more spring lines, restraining the movement of the floating structure 400 in the bow-stern direction. This makes it possible to increase the mooring force that restrains the movement of the floating structure 400 in the bow-stern direction with a simple configuration, and to obtain safe mooring specifications.

[0063] In the present embodiment, the mooring device 409C has been illustrated as having one each of the third drum 32, the third mooring line lead-out group 35, the fourth mooring line lead-out group 45, and the third mooring line 63, but multiple of each may be provided. When multiple third drums 32 are provided, the third mooring lines 63 paid out from some of the third drums 32 may be passed through the fourth outlet 47 and used as spring lines, and the third mooring lines 63 paid out from the other third drums 32 may be passed through the third outlet 37 and used as breast lines. In the present embodiment, the mooring device 409C has been illustrated as having one each, but multiple mooring lines may be provided.

[0064] (Embodiment 5) Fig. 5 is an enlarged view of a main part of a bow side portion of a floating structure 500 according to embodiment 5. Hereinafter, embodiment 5 will be described, focusing on the differences from embodiment 4.

[0065] In embodiment 5, as shown in Figure 5, the mooring equipment 8 has, as mooring equipment related to the spring line 60, a mooring machine 509A, a mooring machine 9B shown in Figure 1, a mooring machine 509C configured in the same manner as the mooring machine 409C, a first mooring line lead-out group 415, a second mooring line lead-out group 25 shown in Figure 1, and a third mooring line lead-out group 535.

[0066] The third mooring line lead-out group 535 includes a third mooring line lead-out 536. The third mooring line lead-out 536 is located on the outer edge 55 of the end region 50 and is provided corresponding to the third drum 32 of the third drum group 31. The third mooring line lead-out 536 defines a third outlet 537, which is the outlet of the third mooring line 63 from the float body 1. The third outlet 537 is located at a position where the angle θa formed between the tangent T to the outer edge 55 of the end region 50 passing through the third outlet 537 and the float body centerline C is greater than or equal to 0 degrees and less than 45 degrees. Furthermore, the third drum 32 corresponding to the third mooring line lead-out 36 is located at a position where the fleet angle is within 10 degrees. Furthermore, the third drum 32 corresponding to the third mooring line lead-out 536 is located so that the third outlet 537 is located on the drum centerline. The third mooring line 63 can then be led out of the floating body 1 through the third exit 537 .

[0067] When the third mooring line 63 is used as a spring line, the third mooring line 63 can be pulled out from the third outlet 537 to the outside of the floating body 1 and connected to a mooring post 111 located on the side of the side surface 6. When the third mooring line 63 is tensioned, the third mooring line 63 extends in a straight line from the third drum 32 toward the third outlet 537, and takes a first posture in which the portion located outside the floating body 1 extends from the third outlet 537 of the floating body 1 toward the quay wall 101 in the stern direction D1.

[0068] When the third mooring line 63 is used as a breast line, the third mooring line 63 can be brought out to the outside of the floating body 1 from the third outlet 537 and connected to a mooring post 111 located to the side of the side surface 6 of the floating body 1 in the direction of extension of the floater centerline C. When the third mooring line 63 is tensioned, the third mooring line 63 extends in a straight line from the third drum 32 toward the third outlet 537, and the part located outside the floating body 1 takes a second posture in which it extends from the floating body 1 toward the quay 101 in a direction perpendicular to the floater centerline C, i.e., in the ship's width direction.

[0069] Furthermore, the third exit 537 is located at a position where the angle formed by the tangent T to the outer edge 55 of the end region 50 passing through the third exit 537 and the float center line C is greater than 0 degrees and less than 45 degrees, so that the mooring line that passes through the third exit 537 and is fastened to the mooring post 111 can be prevented from rubbing against the float main body 1.

[0070] In this way, in the floating structure 500, at least a part of the third mooring line 63 that can be used as a breast line can be reused as the spring line 60. Therefore, the floating structure 500 has at least five first mooring lines 61, second mooring lines 62, and third mooring lines 63 that can be used as spring lines 60. The floating structure 500 can be moored by five or more spring lines, restraining the movement of the floating structure 500 in the bow-stern direction. This makes it possible to increase the mooring force that restrains the movement of the floating structure 500 in the bow-stern direction with a simple configuration, and to obtain safe mooring specifications.

[0071] In this embodiment, the mooring device 509C has one third drum 32, one third mooring line lead-out group 535, and one third mooring line 63, but a plurality of each may be provided. When a plurality of third drums 32 are provided, the third mooring lines 63 paid out from some of the third drums 32 may be used as spring lines, and the third mooring lines 63 paid out from the other third drums 32 may be used as breast lines. In this embodiment, the mooring device 509C has one mooring line, but a plurality of mooring lines may be provided.

[0072] (Embodiment 6) In the above-described embodiment 1, the first outlet 17 is located at the outer edge 56 of the first region 51 extending parallel to the float centerline C, and the second outlet 27 is located at the outer edge 57 of the second region 52 extending parallel to the float centerline C. Alternatively, in this embodiment, the first outlet may be located at a curved outer edge of the deck 5, such as the outer edge 55 of the end region 50. The first outlet may also be located at a position where the angle θa formed between a tangent to the outer edge passing through the first outlet and the float centerline C is equal to or greater than 0 degrees and less than 45 degrees. This makes it possible to prevent the mooring line that passes through the first outlet and is fastened to the mooring bollard 111 from rubbing against the float body 1. The same applies to the second outlet.

[0073] From the above description, many modifications and other embodiments of the present invention will be apparent to those skilled in the art. Therefore, the above description should be construed as illustrative only and is provided for the purpose of teaching those skilled in the art the best mode for carrying out the present invention. Details of the structure and / or function thereof may be substantially changed without departing from the spirit of the present invention.

[0074] (Listing of embodiments) (Mode 1) A floating structure that, when moored, takes a posture in which mooring equipment having a plurality of mooring bollards is located to the side of a floater centerline extending horizontally, and has a side surface, and a plurality of first mooring lines and a plurality of second mooring lines connected to the plurality of mooring bollards located to the side of the side surface, wherein when one of the directions in which the floater centerline extends is defined as a first direction and the other as a second direction, the floating structure comprises: a floater body; a first drum group provided corresponding to each of the plurality of first mooring lines and including a plurality of drums for winding up the first mooring lines; and a second drum group provided corresponding to each of the plurality of second mooring lines and including a plurality of drums for winding up the second mooring lines, wherein, when moored, portions of the plurality of first mooring lines located outside the floater body each extend from the floater body in the first direction, and when moored, portions of the plurality of second mooring lines located outside the floater body each extend from the floater body in the second direction, A floating structure in which the total number of the first mooring lines and the second mooring lines is at least five.

[0075] According to this configuration, the mooring force that restrains the movement of the floating structure in the fore-and-aft direction can be increased, and safe mooring specifications can be obtained.

[0076] (Mode 2) The floating body structure described in Mode 1, wherein the floating body includes a deck in which a first region and a second region are arranged at a distance from each other in the direction in which the float center line extends, and further includes: a first mooring line lead-out group located in the first region, provided corresponding to each of the plurality of drums in the first drum group, and including a plurality of mooring line lead-out groups that define the exit of the first mooring line from the floating body; and a second mooring line lead-out group located in the second region, provided corresponding to each of the plurality of drums in the second drum group, and including a plurality of mooring line lead-out groups that define the exit of the second mooring line from the floating body.

[0077] With this configuration, the route of the mooring line within the floating body can be defined regardless of the position of the mooring bollard.

[0078] (Mode 3) The floating structure according to Mode 1, wherein the first drum group includes three or more of the drums, and further comprising a first drive shaft that transmits a driving force to the three or more drums of the first drum group.

[0079] According to this configuration, the configuration for driving the first drum group can be simplified, and the mooring force for restraining the movement of the floating structure in the fore-and-aft direction can be increased with a simple configuration.

[0080] (Mode 4) A floating structure according to Mode 2, wherein the outlets of the first mooring line guide-out portion group are located at the outer edge extending parallel to the float center line of the first region, and the outlets of the second mooring line guide-out portion group are located at the outer edge extending parallel to the float center line of the second region.

[0081] With this configuration, the mooring lines that pass through the outlets of the first mooring line guide-out section group and the second mooring line guide-out section group and are fastened to the mooring equipment of the floating structure can be prevented from rubbing against the floating body.

[0082] (Mode 5) The floating structure according to Mode 4, further comprising a first roller located on the deck and guiding the first mooring line toward at least one of the drums of the first drum group, the first roller being located at a position where a fleet angle relative to the drums of the first drum group is within 10 degrees.

[0083] This configuration allows for flexibility in the design of the arrangement of the first drum group that winds up the mooring ropes that pass through the outlets of the first mooring rope lead-out group.

[0084] (Mode 6) A floating structure that, when moored, is oriented such that mooring equipment having a plurality of mooring bollards is located to the side of a floater centerline extending horizontally, and has a side surface, and one or more first mooring lines, one or more second mooring lines, and one or more third mooring lines connected to the plurality of mooring bollards located to the side of the side surface, wherein, when one of the directions in which the floater centerline extends is defined as a first direction and the other as a second direction, the floating structure comprises: a floater body including an end region whose outer edge extends curving inward, and a deck in which the first region is aligned in the direction in which the floater centerline extends; a first drum group including one or more drums for winding up the first mooring lines; a second drum group including a plurality of drums for winding up the second mooring lines; and a third drum group including one or more drums for winding up the third mooring lines. a third mooring line lead-out group located in the end region and provided corresponding to each drum of the third drum group, and including one or more mooring line lead-out portions that define an exit of the third mooring line from the floating body, wherein when moored, a portion of the first mooring line located outside the floating body extends from the floating body in the first direction, and when moored, a portion of the second mooring line located outside the floating body extends from the floating body in the second direction, and when moored, the third mooring line takes one of a first attitude in which the portion located outside the floating body extends from the floating body in the first direction, and a second attitude in which the portion located outside the floating body extends in the second direction or in a direction perpendicular to the direction in which the float centerline extends from the floating body, A floating structure, wherein the outlet of the third mooring line guide-out portion group is located at a position where the angle formed by the tangent to the outer edge of the end region passing through the outlet of the third mooring line guide-out portion group and the float center line is greater than 0 degrees and less than 45 degrees, and the total number of the first mooring lines, the second mooring lines and the third mooring lines is at least five.

[0085] With this configuration, the mooring force that restrains the movement of the floating structure in the fore-and-aft direction can be increased, and safe mooring specifications can be achieved. Also, the mooring lines that restrain the movement of the floating structure in the ship's width direction can be converted into mooring lines that restrain the movement of the floating structure in the fore-and-aft direction. This makes it possible to increase the mooring force that restrains the movement of the floating structure in the fore-and-aft direction with a simple configuration.

[0086] (Mode 7) A floating structure that, when moored, is oriented such that mooring equipment having a plurality of mooring bollards is located to the side of a floater centerline extending horizontally, and has a side surface, and one or more first mooring lines, one or more second mooring lines, and one or more third mooring lines connected to the plurality of mooring bollards located to the side of the side surface, wherein, when one of the directions in which the floater centerline extends is defined as a first direction and the other as a second direction, the floating structure comprises: a floater body including a deck on which end regions and first regions are aligned in the direction in which the floater centerline extends; a first drum group including a plurality of drums for winding up the first mooring lines; a second drum group including a plurality of drums for winding up the second mooring lines; and a third drum group including one or more drums for winding up the third mooring lines. a third mooring line lead-out group located in the end region, provided corresponding to each drum of the third drum group, and including one or more mooring line lead-outs that define an exit of the third mooring line from the floating body; and a fourth mooring line lead-out group located in the first region, provided corresponding to each drum of the third drum group, and including one or more mooring line lead-outs that define an exit of the third mooring line from the floating body, wherein, when moored, a portion of the first mooring line located outside the floating body extends from the floating body in the first direction, and when moored, a portion of the second mooring line located outside the floating body extends from the floating body in the second direction, A floating structure in which, when moored, the third mooring line takes one of the following positions: a first position in which the portion located outside the floating body extends from the floating body toward the first direction, and a second position in which the portion located outside the floating body extends from the floating body in a direction perpendicular to the direction in which the floater center line extends or in the second direction; the outlet of the third mooring line lead-out section group is the outlet from the floating body of the third mooring line taking the second position; and the outlet of the fourth mooring line lead-out section group is the outlet from the floating body of the third mooring line taking the first position; and the total number of the first mooring lines, the second mooring lines and the third mooring lines is at least five.

[0087] With this configuration, the mooring force that restrains the movement of the floating structure in the fore-and-aft direction can be increased, resulting in safe mooring specifications. Furthermore, the mooring lines that restrain the movement of the floating structure in the width direction can be diverted to mooring lines that restrain the movement of the floating structure in the fore-and-aft direction. This allows for an increased mooring force that restrains the movement of the floating structure in the fore-and-aft direction with a simple configuration. Furthermore, the mooring lines that pass through the outlets of the fourth mooring line lead-out group and are fastened to the mooring bollards can be prevented from rubbing against the floating body.

[0088] (Mode 8) A floating structure according to Mode 6 or 7, wherein the third mooring line guide-out portion group is arranged symmetrically with respect to the floater center line, and the drums of the third drum group are drums whose rotation axes extend in the same direction as the floater center line.

[0089] With this configuration, mooring lines can be let out to both sides from the drums of the third drum group, thereby increasing the mooring force that restrains the movement of the floating structure in the fore-and-aft direction with a simple configuration.

[0090] (Mode 9) The floating structure according to Mode 7, further comprising a second roller located on the deck for guiding the third mooring line passing through the outlet of the fourth mooring line lead-out group toward at least one of the drums of the third drum group, wherein the second roller is located at a position where the fleet angle relative to the drums of the third drum group is within 10 degrees.

[0091] This configuration allows for design freedom in the arrangement of the third drum group that winds up the third mooring rope that passes through the outlet of the third mooring rope lead-out group or the fourth mooring rope lead-out group.

[0092] (Mode 10) The floating structure according to Mode 1, wherein the floating body is a hull, and the hull has a tank for storing liquefied gas as cargo.

[0093] With this configuration, the mooring force that restrains the vessel's movement in the fore-and-aft direction can be increased, enabling safe mooring specifications to be achieved in liquefied gas carriers, which tend to have a low cargo density and a large freeboard and are therefore susceptible to the effects of wind.

[0094] (Mode 11) The floating structure according to Mode 10, wherein the floating body includes a deck on which a first area and a second area are arranged at a distance from each other in a direction extending along the center line of the floating body, the first area is an area located in the bow direction of the second area, the deck further has a bow deck area located on the bow side of the first area, and a living area is provided in the first area or the bow deck area.

[0095] With this configuration, in an independent tank type liquefied gas carrier in which accommodation areas are provided in the first area or the bow deck area, which are highly susceptible to the effects of wind, the mooring force that restrains movement in the fore-and-aft direction can be increased, thereby achieving safe mooring specifications.

[0096] C Floating body centerline D1 Stern direction D2 Bow direction 1 Floating body main body 2 Tank 3 Accommodation space 5 Deck 6 Side 8 Mooring equipment 11 First drum group 12 First drum 13 Drive shaft 15 First mooring line lead-out group 16 First mooring line lead-out portion 17 First exit 21 Second drum group 22 Second drum 23 Drive shaft 25 Second mooring line lead-out group 26 Second mooring line lead-out portion 27 Second exit 51 First area 52 Second area 60 Spring line 61 First mooring line 62 Second mooring line 63 Third mooring line 64 Header line 65 Breast line 66 Stern line 100 Floating structure 101 Quay 110 Mooring equipment 111 Mooring bollard

Claims

1. A floating structure that, when moored, is oriented such that mooring equipment having a plurality of mooring bollards is located to the side of a floater centerline extending horizontally, and that has a side surface and a plurality of first mooring lines and a plurality of second mooring lines connected to the plurality of mooring bollards located to the side of the side surface, wherein when one of the directions in which the floater centerline extends is defined as a first direction and the other as a second direction, the floating structure comprises: a floating body; a first drum group provided corresponding to each of the plurality of first mooring lines and including a plurality of drums for winding up the first mooring lines; and a second drum group provided corresponding to each of the plurality of second mooring lines and including a plurality of drums for winding up the second mooring lines, wherein, when moored, the portions of the plurality of first mooring lines located outside the floating body each extend from the floating body toward the first direction, and when moored, the portions of the plurality of second mooring lines located outside the floating body each extend from the floating body toward the second direction, A floating structure in which the total number of the first mooring lines and the second mooring lines is at least five.

2. The floating structure according to claim 1, wherein the floating body includes a deck in which a first area and a second area are arranged at a distance from each other in the direction of extension of the center line of the float, and further comprises: a first mooring line lead-out group located in the first area, provided corresponding to each of the plurality of drums in the first drum group, and including a plurality of mooring line lead-out groups that define the exits of the first mooring line from the floating body; and a second mooring line lead-out group located in the second area, provided corresponding to each of the plurality of drums in the second drum group, and including a plurality of mooring line lead-out groups that define the exits of the second mooring line from the floating body.

3. The floating structure according to claim 1, wherein the first drum group includes three or more drums, and further comprises a first drive shaft that transmits driving force to the three or more drums of the first drum group.

4. A floating structure as described in claim 2, wherein the outlets of the first mooring line guide-out group are located at the outer edge extending parallel to the float centerline of the first region, and the outlets of the second mooring line guide-out group are located at the outer edge extending parallel to the float centerline of the second region.

5. A floating structure as set forth in claim 4, further comprising a first roller located on the deck for guiding the first mooring line toward at least one of the drums in the first drum group, the first roller being located at a position where a fleet angle relative to the drums in the first drum group is within 10 degrees.

6. A floating structure that, when moored, is positioned such that mooring equipment having a plurality of mooring bollards is located to the side of a floating body centerline extending horizontally, and has a side surface, and one or more first mooring lines, one or more second mooring lines, and one or more third mooring lines connected to the plurality of mooring bollards located to the side of the side surface, wherein, when one of the directions in which the floating body centerline extends is defined as a first direction and the other as a second direction, the floating body main body includes an end region whose outer edge extends curving inward and a deck in which the first region is aligned in the direction in which the floating body centerline extends; a first drum group including one or more drums for winding up the first mooring lines; a second drum group including multiple drums for winding up the second mooring lines; and a third drum group including one or more drums for winding up the third mooring lines. a third mooring line lead-out group located in the end region and provided corresponding to each drum of the third drum group, and including one or more mooring line lead-out portions that define an exit of the third mooring line from the floating body, wherein when moored, a portion of the first mooring line located outside the floating body extends from the floating body in the first direction, and when moored, a portion of the second mooring line located outside the floating body extends from the floating body in the second direction, and when moored, the third mooring line takes one of a first attitude in which the portion located outside the floating body extends from the floating body in the first direction, and a second attitude in which the portion located outside the floating body extends in the second direction or in a direction perpendicular to the direction in which the float centerline extends from the floating body, A floating structure, wherein the outlet of the third mooring line guide-out portion group is located at a position where the angle formed by the tangent to the outer edge of the end region passing through the outlet of the third mooring line guide-out portion group and the float center line is greater than 0 degrees and less than 45 degrees, and the total number of the first mooring lines, the second mooring lines and the third mooring lines is at least five.

7. A floating structure that, when moored, is positioned such that mooring equipment having a plurality of mooring bollards is located to the side of a floating body centerline extending horizontally, and has a side surface, and one or more first mooring lines, one or more second mooring lines, and one or more third mooring lines connected to the plurality of mooring bollards located to the side of the side surface, wherein, when one of the directions in which the floating body centerline extends is defined as a first direction and the other as a second direction, the floating structure comprises: a floating body main body including a deck on which end regions and first regions are aligned in the direction in which the floating body centerline extends; a first drum group including a plurality of drums for winding up the first mooring lines; a second drum group including a plurality of drums for winding up the second mooring lines; and a third drum group including one or more drums for winding up the third mooring lines. a third mooring line lead-out group located in the end region, provided corresponding to each drum of the third drum group, and including one or more mooring line lead-outs that define an exit of the third mooring line from the floating body; and a fourth mooring line lead-out group located in the first region, provided corresponding to each drum of the third drum group, and including one or more mooring line lead-outs that define an exit of the third mooring line from the floating body, wherein, when moored, a portion of the first mooring line located outside the floating body extends from the floating body in the first direction, and when moored, a portion of the second mooring line located outside the floating body extends from the floating body in the second direction, A floating structure in which, when moored, the third mooring line takes one of the following positions: a first position in which the portion located outside the floating body extends from the floating body toward the first direction, and a second position in which the portion located outside the floating body extends from the floating body in a direction perpendicular to the direction in which the floater center line extends or in the second direction; the outlet of the third mooring line lead-out section group is the outlet from the floating body of the third mooring line taking the second position; and the outlet of the fourth mooring line lead-out section group is the outlet from the floating body of the third mooring line taking the first position; and the total number of the first mooring lines, the second mooring lines and the third mooring lines is at least five.

8. A floating structure as described in claim 6 or 7, wherein the third group of mooring line guide-out portions are each arranged symmetrically with respect to the center line of the float, and the drums of the third group of drums are drums whose rotation axes extend in the same direction as the center line of the float.

9. A floating structure as described in claim 7, further comprising a second roller located on the deck for guiding the third mooring line passing through the outlet of the fourth mooring line lead-out group toward at least one of the drums of the third drum group, the second roller being located at a position where the fleet angle relative to the drums of the third drum group is within 10 degrees.

10. A floating structure according to claim 1, wherein the floating body is a hull, and the hull has a tank for storing liquefied gas as cargo.

11. A floating structure as described in claim 10, wherein the floating body includes a deck on which a first area and a second area are arranged at a distance from each other in the direction of extension of the center line of the floating body, the first area is an area located toward the bow of the second area, the deck further has a bow deck area located on the bow side of the first area, and living quarters are provided in the first area or the bow deck area.

Images