Apparatus for preventing rocking of box and method for installing box in water

Abstract

To provide a device for preventing rocking of a box body and a method for installing the box body in water, capable of reducing labor required for work for installing a storage body in the box body and work for removing the storage body from the box body.SOLUTION: A housing body 2 having a bottom surface 3 and a peripheral wall 5 formed of a waterproof sheet is installed on a box body 50 having a hollow part 51, and a fluid Wb is housed in a non-filled state in an area partitioned by the bottom surface 3 and the peripheral wall 5 for constituting the housing body 2. When the box body 50 in a state of floating on the water is oscillated and inclined, the box body 50 is moved downward and installed at a prescribed position in the water by injecting water Wa into the hollow part 51 while suppressing the oscillation of the box body 50 by making the fluid Wb flow toward the lower side in the inclination direction of the box body 50 inside the housing body 2.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a device for preventing a box from swinging and a method for installing a box underwater, and more specifically to a device for preventing a box from swinging and a method for installing a box underwater that can reduce the labor required for installing a container in the box and removing the container from the box. [Background technology]

[0002] Caissons and other boxes used in revetments and breakwaters are towed by tugboats to the installation site. At the installation site, the boxes are installed in the designated location using winches, cranes, etc. During installation, the boxes pitch and roll due to the influence of waves and other factors as they are lowered into the water. To install the boxes in the designated location quickly and accurately, it is important to suppress the box's rocking motion.

[0003] Therefore, the present inventors have proposed a sway prevention device and installation method in which a tank (container) containing a fluid in an unfilled state is installed on a box, and when the box sways and tilts, the fluid in the tank flows downward in the direction of the box's tilt to suppress the sway of the box (see Patent Document 1). The invention described in Patent Document 1 envisions the use of a rigid tank made of metal, resin, or the like. After multiple attempts to install a box using a rigid tank, the present inventors confirmed that the box's sway can be effectively suppressed. However, because rigid tanks are relatively large and heavy, they require the use of a crane to install and remove the tank from the box, and the installation and removal of the tank require a relatively large amount of labor and time. Based on this, the present inventors have concluded that there is room for improvement in the container that contains the fluid in order to further improve the efficiency of the box installation work. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2023-103068 Summary of the Invention [Problem to be solved by the invention]

[0005] An object of the present invention is to provide a device for preventing a housing from swinging and a method for installing a housing in water that can reduce the labor required for installing and removing the housing from the housing. [Means for solving the problem]

[0006] In order to achieve the above-mentioned object, the device for preventing a box from swinging of the present invention has a container that is installed on the upper surface of a box that is installed underwater and that contains a fluid, the container contains the fluid in an unfilled state, and when the box swings and tilts, the fluid flows inside the container toward the downward direction of the tilt of the box, characterized in that the container has a bottom surface and peripheral walls formed from a waterproof sheet, and the fluid is contained in an area partitioned by the bottom surface and peripheral walls.

[0007] In order to achieve the above-mentioned object, the method of installing a box underwater of the present invention involves placing a container on top of a box having a hollow portion, and storing a fluid in the container in an unfilled state, and when the box floating on water sways and tilts, the fluid is caused to flow inside the container downward in the direction of tilt of the box, thereby suppressing the swaying of the box, and water is injected into the hollow portion to move the box downward and install it in a predetermined position underwater.In this method of installing a box underwater, the container has a bottom and peripheral walls formed from a waterproof sheet, and the fluid is stored in an area partitioned by the bottom and peripheral walls. [Effects of the Invention]

[0008] According to the present invention, when the housing is installed underwater, a container having a bottom and peripheral walls made of a waterproof sheet is placed on the housing, and the area defined by the bottom and peripheral walls of the container is not filled with fluid, thereby suppressing the shaking of the housing. Furthermore, by forming the bottom and peripheral walls of the container from a waterproof sheet, the container can be made lighter. Furthermore, when installing or removing the container from the housing, the bottom and peripheral walls of the container can be folded or bent, allowing the container to be moved in a compact state. Therefore, the labor required for installing or removing the container from the housing can be reduced. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is an explanatory diagram illustrating a plan view of a box in which a rocking prevention device according to the present invention is installed; [Figure 2] 2 is a perspective view illustrating a container of a first embodiment that constitutes the swing prevention device of FIG. 1.

[0023] FIG. [Figure 3] FIG. 2 is a cross-sectional view taken along the arrows AA in FIG. [Figure 4] 1. FIG. 4 is an explanatory diagram illustrating, in plan view, a positioning step at an installation site of a box body on which the anti-sway device of FIG. 1 is installed. [Figure 5] 4 is an explanatory diagram illustrating the flow state of the fluid contained inside the container when the box is tilted to one side (right side) in the length direction from the state of FIG. 3. FIG. [Figure 6] 10 is an explanatory perspective view illustrating a housing body according to another embodiment of the swing prevention device of the present invention. FIG. [Figure 7] 7 is an explanatory perspective view illustrating a state in which each component part constituting the container of FIG. 6 is separated. FIG. [Figure 8] 10 is an explanatory perspective view illustrating a container according to still another embodiment of the swing prevention device of the present invention. FIG. [Figure 9] 10 is an explanatory perspective view illustrating a container according to still another embodiment of the swing prevention device of the present invention. FIG. [Figure 10]10 is an explanatory perspective view illustrating a state in which each component part constituting the container of FIG. 9 is separated. FIG. [Figure 11] 10 is an explanatory perspective view illustrating a container according to still another embodiment of the swing prevention device of the present invention. FIG. [Figure 12] 10 is an explanatory perspective view illustrating a container according to still another embodiment of the swing prevention device of the present invention. FIG. [Figure 13] 10 is an explanatory perspective view illustrating a container according to still another embodiment of the swing prevention device of the present invention. FIG. [Figure 14] 10 is an explanatory perspective view illustrating a container according to still another embodiment of the swing prevention device of the present invention. FIG. [Figure 15] 10 is an explanatory perspective view illustrating a container according to still another embodiment of the swing prevention device of the present invention. FIG. [Figure 16] 10 is an explanatory perspective view illustrating a container according to still another embodiment of the swing prevention device of the present invention. FIG. [Figure 17] 17 is an explanatory perspective view illustrating a state in which the container portion and the support means that constitute the container of FIG. 16 are separated from each other. FIG. [Figure 18] 17 is an explanatory diagram illustrating the container of FIG. 16 in cross section. FIG. [Figure 19] 10 is an explanatory perspective view illustrating a container according to still another embodiment of the swing prevention device of the present invention. FIG. [Figure 20] 20 is an explanatory perspective view illustrating a state in which the container portion and the support means that constitute the container of FIG. 19 are separated from each other. FIG. [Figure 21] 21 is an explanatory diagram illustrating the support means of FIG. 20 in a cross-sectional view. FIG. [Figure 22] 10 is an explanatory perspective view illustrating a container according to still another embodiment of the swing prevention device of the present invention. FIG. [Figure 23] 23 is an explanatory perspective view illustrating a state in which the container portion and the support means that constitute the container of FIG. 22 are separated from each other. FIG. [Figure 24] 24 is an explanatory perspective view illustrating the support means of FIG. 23 in an exploded state. FIG. [Figure 25]10 is an explanatory perspective view illustrating a container according to still another embodiment of the swing prevention device of the present invention. FIG. [Figure 26] 10 is an explanatory diagram illustrating, in plan view, another example of the arrangement of the container constituting the anti-sway device of the present invention. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0010] The following describes the device for preventing rocking of a box body and the method for installing a box body underwater of the present invention based on the embodiments shown in the drawings. In the drawings, the length direction (longitudinal direction), width direction, and up-down direction of the box body 50 are indicated by arrows X, Y, and Z, respectively. In the drawings, the center line C1 of the box body 50 in the width direction (Y direction) and the center line C2 of the box body 50 in the length direction (X direction) are indicated by dashed lines.

[0011] As illustrated in FIGS. 1 to 4 , a device 1 for preventing rocking of a box body 50 of the present invention includes a housing 2 installed on a box body 50 such as a caisson. Examples of the box body 50 include a buried box and the like. In this embodiment, the box body 50 is a caisson. The box body (caisson) 30 is a concrete or steel structure having a hollow portion 51, which is divided into multiple spaces by an outer wall 52 and partition walls 53. Before installation of the box body 50, an appropriate amount of water Wa is poured into the hollow portion 51, and after installation of the box body 50, crushed stone or the like is poured into the hollow portion 51. In this embodiment, a top cover 54 is provided to cover the top surface of the box body 50. The top cover 54 has through-holes through which hoses 80 for pouring water Wa into each hollow portion 51 can be inserted.

[0012] As illustrated in Figure 1, the anti-sway device 1 of this embodiment has a container 2 that suppresses shaking when the box body 50 is installed, and includes an elongated first direction container 2A that extends in a specific first direction D1 of the box body 50 in a planar view, and an elongated second direction container 2B that extends in a second direction D2 that intersects the first direction D1 in a planar view.

[0013] In this embodiment, the first direction D1 is the length direction (X direction) of the case 50, and the second direction D2 is the width direction (Y direction) of the case 50. In the drawings, the first direction D1 is indicated by a dashed line and the second direction D2 is indicated by a dashed two-dot line. In the following, the direction perpendicular to the first direction D1 in a plan view is referred to as the first orthogonal direction, and the direction perpendicular to the second direction D2 in a plan view is referred to as the second orthogonal direction. In this embodiment, the first orthogonal direction is the second direction D2 (Y direction), and the second orthogonal direction is the first direction D1 (X direction).

[0014] The first direction D1 in which the first direction container 2A extends and the second direction D2 in which the second direction container 2B extends may be directions that intersect with each other in a plan view, and the first direction D1 and the second direction D2 may be set in different directions. The first direction D1 and the second direction D2 may be set so that the angle they form in a plan view is, for example, within a range of 70 degrees to 110 degrees, preferably within a range of 80 degrees to 100 degrees, and more preferably 90 degrees.

[0015] As illustrated in FIG. 1 , in this embodiment, two first-direction containers 2A are installed in parallel on the top cover 54 of the box 50 at a distance from each other in the first orthogonal direction (Y direction), and two second-direction containers 2B are installed in parallel on the top cover 54 of the box 50 at a distance from each other in the second orthogonal direction (X direction). With the center of gravity G of the box 50, which is empty and does not contain water Wa or the like in the hollow portion 51 in a plan view, one first-direction container 2A is arranged on one side of the center of gravity G of the box 50 in the first orthogonal direction, and another first-direction container 2A is arranged on the other side of the center of gravity G of the box 50 in the first orthogonal direction. Furthermore, one second-direction container 2B is arranged on one side of the center of gravity G of the box 50 in the second orthogonal direction, and another second-direction container 2B is arranged on the other side of the center of gravity G of the box 50 in the second orthogonal direction. In this embodiment, two second-direction containers 2B are arranged between the two first-direction containers 2A.

[0016] As illustrated in FIGS. 2 and 3, each of the containers 2 (first-direction container 2A, second-direction container 2B) has a bottom surface 3 and a peripheral wall 5 formed from a waterproof sheet, and is configured to contain the fluid Wb in a non-filled state in the area (enclosed space) defined by the bottom surface 3 and the peripheral wall 5. The liquid level of the fluid Wb when the container 2 is not tilted is set to a position lower than the upper end of the peripheral wall 5, allowing the fluid Wb to flow inside the container 2. The container 2 of this embodiment further has a top lid 8 that covers the upper part of the area defined by the bottom surface 3 and the peripheral wall 5. FIG. 2 illustrates a state in which the top lid 8 has been removed from the peripheral wall 5.

[0017] The waterproof sheet forming the container 2 is a sheet-like member that is waterproof (watertight) and thick enough to be bent. Various waterproof sheet-like members can be used for the waterproof sheet, but specific examples include sheet-like members made of resins such as vinyl chloride or rubber. More specifically, examples of waterproof sheets include tarpaulin, which is a polyester fabric coated with a resin such as vinyl chloride, and crosslam sheets, which are high-strength plastic films made of polyolefin resin. It is preferable to use a waterproof sheet that is tear-resistant, has excellent abrasion resistance, and is easy to process. The thickness of the waterproof sheet is, for example, 0.1 mm to 10 mm, more preferably 0.2 mm to 7 mm, and even more preferably 0.3 mm to 5 mm.

[0018] As shown in FIG. 2, the bottom surface 3 of the container 2 in this embodiment is made of a waterproof sheet membrane that is rectangular in plan view. The peripheral wall 5 of the container 2 is made of a cylindrical bag formed from the waterproof sheet, and the inner space of the bag is filled with a gas (e.g., air) or a liquid (e.g., water), so that the peripheral wall 5 is maintained in an upright state (extending vertically and standing). The peripheral wall 5 is disposed so as to surround the outer periphery of the bottom surface 3. In this embodiment, the peripheral wall 5 is made of a single, continuous cylindrical bag that is rectangular in plan view, and the upper surface of the bottom surface 3 and the lower surface of the peripheral wall 5 are joined. In other words, the container 2 in this embodiment has a structure in which the bottom surface 3 and the peripheral wall 5 are integrated.

[0019] In this embodiment, an injection port 5b is provided in the bag that constitutes the peripheral wall 5, and a gas or liquid can be injected into the inner space of the bag through the injection port 5b. An openable lid is provided at the injection port 5b, and when the lid is closed, the bag that constitutes the peripheral wall 5 is sealed. When the bag that constitutes the peripheral wall 5 is crushed with the lid open, the gas or liquid filled in the bag is discharged to the outside.

[0020] In this embodiment, the top cover 8 is made of a waterproof membrane sheet that is rectangular in plan view. In this embodiment, the top cover 8 is configured to be detachable from the peripheral wall 5. By joining a joint 5a provided on the upper surface of the peripheral wall 5 with a joint 8a provided on the lower surface of the top cover 8, the peripheral wall 5 and the top cover 8 can be joined in a watertight manner. The joints 5a and 8a can be made of, for example, hook-and-loop fasteners, a magnetic sheet, or an adhesive sheet. The method of joining the peripheral wall 5 and the top cover 8 is not limited to the method of providing the joints 5a and 8a, and various other methods can also be used. For example, the peripheral wall 5 and the top cover 8 can be joined using tape, a fastener, or the like.

[0021] In this embodiment, the top lid 8 is provided with an inlet / outlet port 10, which is provided with a lid that can be opened and closed. Even when the top lid 8 is joined to the peripheral wall 5, by inserting a hose connected to a pump or the like into the inlet / outlet port 10, it is possible to inject fluid Wb into the area partitioned by the bottom surface 3 and the peripheral wall 5 and to discharge the fluid Wb contained in the aforementioned area.

[0022] In the container 2 of this embodiment, when the bag constituting the peripheral wall 5 is not filled with gas or liquid, the bag constituting the peripheral wall 5 is in a deflated state, and the bottom surface 3, peripheral wall 5, and top lid 8 constituting the container 2 are foldable, allowing for compact storage. The bottom surface 3, peripheral wall 5, and top lid 8 of the container 2 may have a single-layer structure formed from a single waterproof sheet, or a multi-layer structure formed from multiple overlapping waterproof sheets. For example, the container 2 may have a structure in which the peripheral wall 5 and top lid 8 are integrated. While this embodiment illustrates a case in which the outer shape of the container 2 is a rectangular parallelepiped, the shape of the container 2 is not particularly limited and other shapes are also possible.

[0023] In this embodiment, connectors 2a are attached to a plurality of locations on the housing 2. As illustrated in Fig. 1, in this embodiment, connectors 55 fixed to the case 50 (top lid 54) and connectors 2a provided on the housing 2 are connected by a fixing wire 60, thereby fixing the housing 2 to the case 50. There are no particular limitations on the method for fixing the housing 2 to the case 50, and any structure may be used as long as the housing 2 does not easily move from its installed position. For example, the housing 2 can be fixed directly to the top lid 54 of the case 50 using a fixing device, a weight, or the like.

[0024] Each housing body 2 is preferably elongated in shape with a width S2 set to a predetermined ratio or less of its longitudinal length S1. The predetermined ratio may be set to, for example, 50% or less, more preferably 20% or less, even more preferably less than 20%, and even more preferably 15% or less.

[0025] The length S1 (dimension in the first direction D1) of the first direction housing 2A may be set to, for example, 50% to 100%, more preferably 70% to 100%, and even more preferably 90% to 100% of the maximum outer dimension in the first direction D1 of the case 50. Setting the length within the above-mentioned numerical range is advantageous for increasing the effect of the first direction housing 2A in suppressing swing of the case 50 in the first direction D1 without the first direction housing 2A protruding outward from the top surface of the case 50 in a plan view.

[0026] The width S2 (dimension in the first orthogonal direction) of the first direction container 2A may be set to, for example, 5% to 50%, more preferably 10% to 50%, and even more preferably 20% to 50% of the maximum outer dimension in the first orthogonal direction of the case 50. Setting the width S2 within the above-mentioned numerical range is advantageous for maintaining the effect of the first direction container 2A in suppressing the shaking of the case 50 in the first direction D1, while reducing the tilt of the case 50 in the first orthogonal direction due to the influence of the fluid Wb inside the first direction container 2A when the shaking has subsided.

[0027] Similarly, the length S1 (dimension in the second direction D2) of the second direction housing 2B may be set to, for example, 50% to 100%, more preferably 70% to 100%, and even more preferably 90% to 100% of the maximum outer dimension in the second direction D2 of the case 50. Setting the length within the above-mentioned numerical range is advantageous for increasing the effect of the second direction housing 2B in suppressing swing of the case 50 in the second direction D2 without making the second direction housing 2B excessively large.

[0028] The width S2 (dimension in the second orthogonal direction) of the second direction container 2B may be set to, for example, 5% to 50%, more preferably 10% to 50%, and even more preferably 20% to 50% of the maximum outer dimension in the second orthogonal direction of the case 50. Setting the width S2 within the above-mentioned numerical range is advantageous for maintaining the effect of the second direction container 2B in suppressing the rocking of the case 50 in the second direction D2, while reducing tilt of the case 50 in the second orthogonal direction due to the influence of the fluid Wb inside the second direction container 2B when the rocking has stopped.

[0029] The total area in a plan view of the container 2 constituting the anti-sway device 1 may be set to, for example, 30% to 100%, more preferably 40% to 90%, and even more preferably 50% to 80% of the area of ​​the top surface of the case 50. The total weight including the fluid Wb of the container 2 constituting the anti-sway device 1 may be set to, for example, 1% to 10%, more preferably 1% to 8%, and even more preferably 1% to 5% of the weight of the empty case 50 when water Wa or the like is not contained in the hollow portion 51.

[0030] Next, we will explain how to install the box 50 underwater using the sway prevention device 1. First, before transporting the box 50 to the installation site, each of the containers 2 (first direction container 2A and second direction container 2B) that make up the sway prevention device 1 is installed on the box 50. Then, the area defined by the bottom surface 3 and peripheral wall 5 of each container 2 is filled with the fluid Wb in a non-filled state.

[0031] More specifically, in this embodiment, when each container 2 is transported by vehicle or ship to the construction site where the box 50 is located, the bag constituting the peripheral wall 5 of the container 2 is deflated, and the bottom surface 3, peripheral wall 5, and top lid 8 are folded to form a compact structure. At the construction site, the folded container 2 is moved onto the box 50 (top lid 54), and the bottom surface 3, peripheral wall 5, and top lid 8 constituting the container 2 are unfolded on top of the box 50. Then, gas (such as air) is injected into the bag through the injection port 5b provided on the bag constituting the peripheral wall 5 using an air compressor or the like, thereby inflating the bag constituting the peripheral wall 5. When injecting liquid into the bag constituting the peripheral wall 5, a hose connected to a pump is inserted into the injection port 5b, and water from the body of water on which the box 50 will be floated is injected into the bag. When the bag constituting the peripheral wall 5 is filled with gas or liquid and the lid of the injection port 5b is closed, the peripheral wall 5 is placed in an upright state.

[0032] Next, each of the housings 2 is fixed to the case 50. In this embodiment, the connectors 55 fixed to the case 50 at multiple locations are connected to the connectors 2a provided at multiple locations on the housing 2 by fixing wires 60, respectively.

[0033] Thereafter, using a hose or the like connected to a pump, the fluid Wb is injected into the region defined by the bottom surface 3 and peripheral wall 5 of the container 2, so that the region is not filled with the fluid Wb. For example, water from the body of water on which the box 50 is floating is used as the fluid Wb. Injecting the fluid Wb into the container 2 can also be performed using, for example, a hose 80 for injecting water Wa into the hollow portion 51 of the box 50. If the container 2 has a top cover 8 as in this embodiment, the top cover 8 can be attached to the peripheral wall 5 after the fluid Wb has been injected into the region, or the fluid Wb can be injected through the inlet / outlet port 10 after the top cover 8 is attached to the peripheral wall 5.

[0034] 3, the amount of fluid Wb contained in the container 2 is preferably set so that when the container 2 is not tilted, the liquid level of the fluid Wb is, for example, 20% to 70% of the height of the peripheral wall 5, and more preferably 30% to 60%. More specifically, when the container 2 is not tilted, the liquid level of the fluid Wb contained in the container 2 is preferably set to, for example, 10 cm to 50 cm, and more preferably 20 cm to 40 cm. The weight of the fluid Wb contained in the container 2 is preferably, for example, 1% to 5% of the weight of the empty box 50 when no water Wa or the like is contained in the hollow portion 51. With the above steps, the installation of the anti-sway device 1 (container 2) on the box 50 is completed.

[0035] Meanwhile, a hose 80 is inserted into a through-hole provided in the top cover 54 of the case 50, and water Wa from the body of water on which the case 50 will float is poured into the hollow portion 51 of the case 50. The amount of water Wa poured at this time is an amount that will allow the case 50 to float on the water, for example, an amount of water that will fill about 1 / 5 to 1 / 2 of the volume of the hollow portion 51.

[0036] The floating box 50 is then connected to a tugboat, and the box 50 is transported to the installation site by the tugboat. At the installation site of the box 50, as shown in Fig. 4, a wire rope 70 wound around a winch installed on the existing box 90 is reeled around a pulley 72 installed on the existing box 90 and connected to a fixing part 71 installed on the box 50 to be installed. In this embodiment, fixing parts 71 are fixed to multiple locations on the box 50, and multiple wire ropes 70 are arranged above the first direction housing 2A and the second direction housing 2B.

[0037] Then, the box body 50 is positioned in the X and Y directions by using a winch (not shown) installed on the existing box body 90 to pay out and reel in the wire ropes 70. A worker also performs the necessary work on top of the box body 50 (top cover 54). Note that various tools are used in addition to the winch, wire ropes 70, and pulley 72 in the process of positioning the box body 50, but these are not shown or described here. During transportation of the box body 50 to the installation site and during the process of positioning the box body 50, the box body 50 sways due to the influence of waves, etc.

[0038] The winch can be installed not only on the existing box body 90 but also on other offshore structures, shores, etc. Also, for example, the box body 50 can be positioned in the X and Y directions by being hung by a crane or the like. When the box body 50 is first installed at the installation site, it is positioned in the X and Y directions along a reference such as a crane ship.

[0039] After the positioning step of the box body 50, water Wa is poured into the hollow portion 51 of the box body 50 using the hose 80. This causes the box body 50 to move downward and be placed on the bottom of the water. Then, crushed stone or the like is poured into the hollow portion 51 to fill it. After the box body 50 has been installed on the bottom of the water, the respective containers 2 that make up the rocking prevention device 1 are removed from the box body 50.

[0040] In the operation of removing the containers 2, the fluid Wb contained in each container 2 is discharged to the outside of the container 2 using a hose connected to a pump or the like. If the container 2 has a top cover 8 as in this embodiment, a hose connected to a pump or the like is inserted into the inlet / outlet port 10 of the top cover 8 to discharge the fluid Wb contained in the container 2. If the top cover 8 is detachable from the peripheral wall 5 as in this embodiment, the fluid Wb contained in the container 2 may be discharged to the outside after removing the top cover 8 from the peripheral wall 5 using a hose connected to a pump or the like. If the fluid Wb contained in the container 2 is water, the fluid Wb (water) discharged from the container 2 may be poured into the hollow portion 51 of the case 50 or may be drained into the water surrounding the case 50.

[0041] Thereafter, the connection between each of the fixing wires 60 used to fix the housing body 2 and the connectors 2a provided on the housing body 2 is released. Then, the gas or liquid filled in the bag that forms the peripheral wall 5 of the housing body 2 is discharged to the outside through the injection port 5b, causing the bag that forms the peripheral wall 5 to deflate. Next, the bottom surface 3, peripheral wall 5, and top lid 8 that form the housing body 2 are folded to a compact state, and the housing body 2 is removed from the box 50. The removed anti-swaying device 1 (each housing body 2) can then be reused in other boxes 50 or at other construction sites.

[0042] As described above, when installing the case body 50 in water, rocking motion S occurs in the X and Y directions of the case body 50. Rocking motion (up and down movement) also occurs in the Z direction, but since the installation of the case body 50 is performed in calm waters, this does not pose a major problem in determining the installation direction.

[0043] FIG. 5 shows a state in which the box body 50 has swung to one side (the right) in the X direction. In the drawing, C denotes the center of buoyancy of the box body 50 when the box body 50 is not tilted in the X direction or the Y direction (neutral state shown in FIG. 3). Q denotes the combined center of gravity of the centers of gravity of the fluid Wb in all of the containers 2 that make up the swing prevention device 1 in the neutral state. When the box body 50 is in the neutral state, the center of gravity G of the box body 50, the center of buoyancy C of the box body 50, and the combined center of gravity Q of the fluid Wb in the containers 2 are located at the same XY coordinates (they are at the same position in a plan view). As illustrated in FIG. 5, when the box body 50 sways and tilts, for example, to one side (the right) in the X direction, the center of buoyancy C of the box body 50 moves from the center position in the X direction to a position C' on the right side.

[0044] The center of gravity G' of the box 50 containing the water Wa has moved significantly downward relative to the center of gravity G due to the weight of the water Wa. Furthermore, as the box 50 tilts to the right and the water Wa is concentrated on the right side, the center of gravity G' moves to the right relative to the center of gravity G. However, this amount of movement to the right is so small that it can be ignored.

[0045] Buoyancy force RF acting on center of buoyancy C' after the movement generates moment RFM around center of gravity G' of box body 50. This moment RFM is a restoring moment that attempts to return box body 50 to the position before tilting. This restoring moment RFM causes box body 50 to sway laterally to the other side (left side) in the X direction, and thereafter, the rocking to the right and left is repeated, causing the box body 50 to rock.

[0046] Meanwhile, as the box 50 tilts, the center of gravity of the fluid Wb in each container 2 moves to a position below the tilt of the box 50, and the combined center of gravity Q of the fluid Wb in the container 2 moves to a position Q' below the tilt of the box 50. For example, when the box 50 swings and tilts to one side (right side) in the X direction, the center of gravity of the fluid Wb in the first direction container 2A extending in the X direction moves to a position Q' below the tilt of the box 50. The center of gravity of the fluid Wb in the second direction container 2B also moves slightly, but because the width S2 of the second direction container 2B in the X direction is narrow, the amount of movement of the combined center of gravity Q due to the fluid Wb in the second direction container 2B is minimal. A moment QFM is generated around the center of gravity G' of the box 50, mainly due to gravity acting on the fluid Wb that has moved in the first direction container 2A. This moment QFM is a moment (damping moment) in the opposite direction to the restoring moment RFM, and the phase of the moment QFM lags slightly behind the restoring moment RFM, so that the damping moment QFM suppresses the rocking of the case body 50 caused by the restoring moment RFM. As a result, rocking of the case body 50 when installed in water can be suppressed.

[0047] Furthermore, the damping moment QFM cancels out the restoring moment RFM of the box body 50, thereby shifting the natural period of the sway of the box body 50 to a longer period. As a result, the natural period of an unmeasured box body 50 that does not have the sway prevention device 1 installed can be changed to a different natural period from the wave period band (around 10 seconds) that is most susceptible to sway (susceptible to synchronization), thereby preventing synchronization of the sway.

[0048] Similarly, when the box 50 sways and tilts in the Y direction, the center of gravity of the fluid Wb in the second direction container 2B extending in the Y direction moves downward in the tilt direction of the box 50, causing the combined center of gravity Q of the fluid Wb in the container 2 to move to a position Q' below the tilt direction of the box 50. Then, a moment QFM is generated around the center of gravity G' of the box 50 due to gravity acting mainly on the fluid Wb that has moved in the second direction container 2B, and this damping moment QFM cancels out the restoring moment RFM of the box 50, thereby suppressing the rocking of the box 50 in the Y direction.

[0049] Thus, in the present invention, when installing the housing 50 underwater, the housing 2, which has a bottom surface 3 and peripheral wall 5 made of a waterproof sheet, is placed on the housing 50, and the area defined by the bottom surface 3 and peripheral wall 5 of the housing 2 is filled with the fluid Wb in a non-filled state, thereby effectively suppressing rocking of the housing 50. Furthermore, by forming the bottom surface 3 and peripheral wall 5 of the housing 2 from a waterproof sheet, the housing 2 can be made lighter than when a rigid metal or resin tank is used. Furthermore, when installing or removing the housing 2 in or from the housing 50, the housing 2 can be made compact by folding or bending the bottom surface 3 and peripheral wall 5 of the housing 2. Because the housing 2 weighs approximately 10 kg to 100 kg when not containing the fluid Wb, the housing 2 can be easily carried by a small number of workers without using a crane. Therefore, compared to using a rigid tank, the labor and time required for installing the container 2 in the box body 50 and removing the container 2 from the box body 50 can be reduced, thereby improving the efficiency of the installation work for the box body 50.

[0050] When a rigid tank is used, a relatively large vehicle or ship must be used to transport the tank, but the present invention has the advantage that it is possible to transport the container 2 using a relatively small vehicle or ship. Furthermore, the container 2, whose bottom surface 3 and peripheral wall 5 are made of a waterproof sheet, can be easily manufactured at a relatively lower cost than a rigid tank, and is therefore very useful to those skilled in the art.

[0051] When at least a portion of the peripheral wall 5 of the housing 2 is formed from a bag filled with gas or liquid, as in this embodiment, the peripheral wall 5 can be simply configured to stably maintain an upright state. In particular, when the entire peripheral wall 5 of the housing 2 is formed from a single, connected bag, as in this embodiment, the peripheral wall 5 can be very simply configured to stably maintain an upright state. The peripheral wall 5 can be placed in an upright state simply by injecting gas or liquid into the bag that constitutes the peripheral wall 5, making installation of the housing 2 easy and quick. Furthermore, the peripheral wall 5 can be folded simply by discharging the gas or liquid filled in the bag that constitutes the peripheral wall 5 to the outside, making removal of the housing 2 also easy and quick. Note that this embodiment illustrates an example in which the bottom surface 3 and peripheral wall 5 that constitute the housing 2 are integrated. However, for example, the peripheral wall 5 can also be configured to be detachable from the bottom surface 3.

[0052] When the container 2 is configured to have the top lid 8 as in this embodiment, even if the container 2 tilts due to the case 50, the risk of the fluid Wb contained in the container 2 leaking out of the container 2 can be further reduced. Note that the liquid level of the fluid Wb contained in the container 2 can be relatively shallow, and the presence of the container 2 suppresses the shaking of the case 50, making it difficult for the case 50 to tilt significantly. Therefore, even if the top lid 8 is not provided, there is a low risk of the fluid Wb contained in the container 2 leaking out of the container 2. Therefore, the top lid 8 can be provided arbitrarily as needed.

[0053] When the top lid 8 is configured to be detachable from the peripheral wall 5 of the container 2 as in this embodiment, the work of pouring the fluid Wb into the container 2 can be performed with the top lid 8 removed, making it easier for the worker to visually check the amount of fluid Wb contained in the container 2. In addition, the work of draining the fluid Wb from the container 2 can also be performed with the top lid 8 removed, making it easier to move the hose used to drain the fluid Wb to every corner of the container 2 and making the work of draining the fluid Wb more efficient.

[0054] For example, in a structure in which the peripheral wall 5 and the top lid 8 that constitute the container 2 are integrated, part or all of the top lid 8 can be made of a transparent waterproof sheet, and the amount and depth of the fluid Wb contained in the container 2 can be visually confirmed through the transparent sheet portion. Also, for example, a door that can be opened and closed can be provided in part of the top lid 8, and the amount and depth of the fluid Wb contained in the container 2 can be visually confirmed through the door.

[0055] In this embodiment, the case where water is used as the fluid Wb contained in the container 2 has been described, but a liquid other than water may also be contained in the container 2. In particular, if a liquid with a higher specific gravity than water is contained in the container 2, the gravity QF acting on the fluid Wb becomes larger, and the damping moment QFM can be increased, thereby further increasing the effect of suppressing the restoring moment RFM.

[0056] In the above, a case has been described in which the container 2 constituting the swing prevention device 1 is installed in the box 50 and the container 2 is filled with the fluid Wb before the box 50 is transported to the installation site. However, the timing for installing the container 2 in the box 50 or the timing for filling the container 2 with the fluid Wb may be any time before the box 50 is positioned for installation relative to the bottom ground. For example, the container 2 may be installed in the box 50 after the box 50 is transported to the installation site, and the container 2 may be filled with the fluid Wb. However, because the box 50 swings even when transported to the installation site, it is preferable to install the container 2 in the box 50 and fill the container 2 with the fluid Wb before transporting the box 50 to the installation site.

[0057] The housing 2 constituting the anti-sway device 1 of the present invention can also be configured as in the embodiment shown in Figures 6 and 7. When the housing 2 of this embodiment is used, the same effects as those of the anti-sway device 1 of the box body 50 and the method of installing the box body 50 in water of the embodiment shown in Figures 1 to 5 can be achieved.

[0058] As illustrated in Figures 6 and 7, the housing body 2 of this embodiment has a structure in which multiple segments 4, 6, and 9 that can be connected and disconnected to each other are connected together. Figure 6 shows the housing body 2 in an assembled state, and Figure 7 shows the housing body 2 in a state in which the segments 4, 6, and 9 that make up the housing body 2 have been separated.

[0059] 6 and 7, the bottom surface 3 of the container 2 of this embodiment is made up of multiple divisions 4 formed from a waterproof sheet. Each division 4 is provided with a joint 4a, and by joining the joints 4a of adjacent divisions 4, the divisions 4 that make up the bottom surface 3 can be connected together in a watertight manner.

[0060] The peripheral wall 5 of the housing 2 in this embodiment is composed of cylindrical divisions 6 made of a waterproof sheet and strip-shaped joint members 7 also made of a waterproof sheet. In this embodiment, the divisions 6 that form the corner portions of the peripheral wall 5 are formed in an L-shape in plan view. The divisions 6 that form the linear portions of the peripheral wall 5 are formed in a linear shape in plan view. A joint portion 6a is provided at the end of each division 6, and an adhesive portion that can be adhered to the joint portion 6a is provided on the inner surface of the joint member 7.

[0061] With the ends of adjacent segments 6 facing each other, a joint member 7 is wrapped around the outside of the joints 6a of adjacent segments 6, and the joints 6a of the pair of opposing segments 6 are bonded to the adhesive portions of the joint member 7, thereby enabling the segments 6 that make up the peripheral wall 5 to be watertightly connected to each other. By joining the multiple segments 6 that make up the peripheral wall 5 together in a rectangular ring shape in plan view, a single continuous tubular bag body is formed that is rectangular in plan view. In this embodiment, an injection port 5b is provided in one segment 6 that makes up the peripheral wall 5, but it is also possible to provide injection ports 5b in multiple segments 6 or in all segments 6, for example.

[0062] In this embodiment, the top cover 8 of the container 2 is composed of multiple segments 9 made of a waterproof sheet. Each segment 9 is provided with a joint 9a, and by joining the joints 9a of adjacent segments 9, the segments 9 can be connected together in a watertight manner. In this embodiment, the inlet / outlet port 10 is provided in one segment 9 constituting the top cover 8, but it is also possible to provide inlet / outlet ports 10 in multiple segments 9 or in all segments 9, for example.

[0063] In this embodiment, the divisions 4 that make up the bottom surface 3 of the housing 2 are joined to joints 3a provided on the upper surface of each division 4 that makes up the bottom surface 3 of the housing 2 and joints provided on the underside of each division 6 that makes up the peripheral wall 5, thereby enabling a watertight connection between the divisions 4 that make up the bottom surface 3 and the divisions 6 that make up the peripheral wall 5. Furthermore, the divisions 6 that make up the peripheral wall 5 and the divisions 9 that make up the upper cover 8 are joined to joints 5a provided on the upper surface of each division 6 that makes up the peripheral wall 5 of the housing 2 and joints 8a provided on the underside of each division 9 that makes up the upper cover 8, thereby enabling a watertight connection between the divisions 6 that make up the peripheral wall 5 and the divisions 9 that make up the upper cover 8. The joints 4a, 6a, 9a, joints 3a, 5a, 8a, and adhesive parts of the joint member 7 described above can be made of, for example, hook-and-loop fasteners, magnetic sheets, or adhesive sheets.

[0064] In this way, when at least a portion of the peripheral wall 5 of the container 2 is configured as a plurality of connected segments 6 that can be connected and disconnected to each other, the peripheral wall 5 can be separated into the plurality of segments 6, making the container 2 easier to carry. Furthermore, when at least a portion of the bottom surface 3 of the container 2 is configured as a plurality of connected segments 4 that can be connected and disconnected to each other, as in this embodiment, the bottom surface 3 can be separated into the plurality of segments 4, making the container 2 easier to carry. When at least a portion of the top lid 8 of the container 2 is configured as a plurality of connected segments 9 that can be connected and disconnected to each other, the top lid 8 can be separated into the plurality of segments 9, making the container 2 easier to carry.

[0065] As in this embodiment, when the bottom surface 3 and peripheral wall 5 of the housing 2 are respectively configured with a plurality of connected segments 4, 6 that can be connected and disconnected to one another, it becomes possible to easily change the size of the housing 2 by changing the number of connected segments 4, 6 that make up the bottom surface 3 and peripheral wall 5, or the sizes of the segments 4, 6. This makes it possible to apply the housing 2 to boxes 50 of various sizes, further improving the versatility of the housing 2.

[0066] The method for connecting the segments 4, 6, and 9 together is not limited to the configuration of this embodiment, and various other configurations are possible. For example, the segments 4, 6, and 9 can be connected together using wire fasteners or connectors. Using the joint member 7 as in this embodiment is advantageous for improving the watertightness of the connecting portions between the segments 6 that make up the peripheral wall 5. However, for example, it is also possible to directly join the ends of the segments 6 that make up the peripheral wall 5 without using the joint member 7. Furthermore, while this embodiment illustrates a case in which the segments 6 that make up the peripheral wall 5 are cylindrical, it is also possible to configure each segment 6 that makes up the peripheral wall 5 as a bag, and to inflate each segment 6 individually.

[0067] The housing 2 constituting the anti-sway device 1 of the present invention can also be configured as in the embodiment shown in Fig. 8. When the housing 2 of this embodiment is used, the same effects as those of the anti-sway device 1 of the box body 50 and the method of installing the box body 50 in water of the embodiment shown in Figs. 1 to 5 can be achieved.

[0068] As illustrated in FIG. 8, the container 2 of this embodiment differs in the structure of a pair of longitudinal walls 5A extending in the longitudinal direction of the peripheral wall 5 and a pair of widthwise walls 5B extending in the widthwise direction of the peripheral wall 5. The longitudinal walls 5A are made of a waterproof membrane sheet. The widthwise walls 5B are made of a tubular bag body formed of a waterproof sheet. The lower ends of the longitudinal walls 5A and the widthwise walls 5B are joined to the waterproof membrane sheet that forms the bottom surface 3. In this embodiment, the longitudinal ends of the longitudinal walls 5A are not joined to the bag body that forms the widthwise walls 5B. This embodiment illustrates a case where an upper lid 8 is not provided.

[0069] In this embodiment, membrane-like connecting portions 11 made of a waterproof sheet are provided at both longitudinal ends of each widthwise wall portion 5B. By joining the joints provided at the longitudinal ends of the longitudinal wall portion 5A and the connecting portions 11 of the widthwise wall portion 5B, the longitudinal wall portion 5A is supported by the connecting portions 11 and the widthwise wall portion 5B, maintaining the longitudinal wall portion 5A in an upright position. The joints provided at the longitudinal ends of the longitudinal wall portion 5A and the connecting portions 11 of the widthwise wall portion 5B are configured to be joined and unjoined. In this embodiment, the joints of the longitudinal wall portion 5A and the connecting portions 11 of the widthwise wall portion 5B are joined in an overlapping state. The joining surfaces of the joints of the longitudinal wall portion 5A and the connecting portions 11 of the widthwise wall portion 5B can be formed, for example, with a hook-and-loop fastener, a magnetic sheet, an adhesive sheet, or the like.

[0070] In this embodiment, a core 12 is provided inside one of the pair of widthwise walls 5B (the widthwise wall 5B on the lower left side of the paper in FIG. 8), and the one widthwise wall 5B is maintained in a horizontally long cylindrical shape by the core 12. The core 12 is preferably made of a lightweight material such as polystyrene foam or urethane. The other widthwise wall 5B (the widthwise wall 5B on the upper right side of the paper in FIG. 8) is made of a bag that can be filled with gas or liquid. In this embodiment, the connector 2a is configured to be detachable from the longitudinal wall 5A. The connector 2a can also be attached to another position on the container 2.

[0071] In this embodiment, before installing the housing 2 in the box 50 or when removing the housing 2 from the box 50, the longitudinal wall portions 5A and the connectors 2a are separated. The connecting portions 11 provided at the longitudinal ends of the widthwise wall portions 5B and the joint portions provided at the longitudinal ends of the longitudinal wall portions 5A are separated. The pair of longitudinal wall portions 5A are folded so as to overlap on the bottom surface 3. The other widthwise wall portion 5B is deflated. The connecting portion 11 provided on the other widthwise wall portion 5B is folded and aligned with the deflated widthwise wall portion 5B. The connecting portion 11 provided on one widthwise wall portion 5B in which the winding core 12 is disposed is folded and aligned with the peripheral surface of the one widthwise wall portion 5B.

[0072] Next, one widthwise wall 5B on which the winding core 12 is provided is rolled toward the other widthwise wall 5B, and the flattened bottom surface 3, the pair of longitudinal walls 5A, and the other widthwise wall 5B (connecting portion 11) are sequentially wound around the outside of one widthwise wall 5B. As a result, the waterproof sheet constituting the bottom surface 3, the pair of longitudinal walls 5A, and the other widthwise wall 5B is wound in a roll around the outside of one widthwise wall 5B.

[0073] When installing the container 2 of this embodiment on the box 50, the waterproof sheet that constitutes the bottom surface 3, the pair of longitudinal walls 5A, and the other widthwise wall 5B is wrapped around one widthwise wall 5B, which is rolled over the box 50 to spread the bottom surface 3, the pair of longitudinal walls 5A, and the other widthwise wall 5B over the box 50. Gas or liquid is then injected into the other widthwise wall 5B to inflate it. Next, the connecting portions 11 provided at the longitudinal ends of the widthwise wall 5B are joined to the joints provided at the longitudinal ends of the longitudinal wall 5A, leaving the pair of longitudinal walls 5A standing.

[0074] Then, the connectors 2a are attached to the longitudinal wall portions 5A to fix the container 2 to the box body 50. Next, the area defined by the bottom surface 3 and the peripheral wall 5 (the pair of longitudinal wall portions 5A and the pair of widthwise wall portions 5B) is filled with the fluid Wb and stored in a non-filled state. This completes the installation of the container 2.

[0075] When the container 2 does not contain the fluid Wb, as in this embodiment, if at least the bottom surface 3 is configured to be wrapped around one wall portion that constitutes the peripheral wall 5 (in this embodiment, one width direction wall portion 5B), the container 2 can be installed in the case 50 and removed from the case 50 very efficiently. Furthermore, if the container 2 is configured, as in this embodiment, so that the other wall portions that constitute the peripheral wall 5 together with the bottom surface 3 are wrapped around one wall portion that constitutes the peripheral wall 5, this is more advantageous for improving the efficiency of the installation of the container 2 in the case 50 and the removal of the container 2 from the case 50. For example, if an upper lid 8 is provided on the container 2, the upper lid 8 can be configured to be wrapped around one wall portion that constitutes the peripheral wall 5 together with the bottom surface 3. For example, it is possible to configure the longitudinal wall portion 5A to be wrapped around the other wall portions that together with the bottom surface 3 form the peripheral wall 5, but as in this embodiment, configuring the widthwise wall portion 5B to be wrapped around the other wall portions that together with the bottom surface 3 form the peripheral wall 5 is more advantageous for making the storage body 2 compact.

[0076] As in this embodiment, providing the winding core 12 on one wall portion that constitutes the peripheral wall 5 makes it easier to more stably wind the bottom surface 3 and other wall portions that constitute the peripheral wall 5 on the wall portion that constitutes the side of the peripheral wall 5. Furthermore, providing the winding core 12 is advantageous in maintaining the upright state of the wall portion on one side that constitutes the peripheral wall 5 more stably. In this embodiment, the winding core 12 is provided only on one widthwise wall portion 5B, but it is also possible to provide the winding core 12 on both the widthwise wall portion 5B on one side and the widthwise wall portion 5B on the other side, so that the bottom surface 3 and one side of the pair of longitudinal wall portions 5A are wound around the widthwise wall portion 5B on one side, and the bottom surface and the other side of the pair of longitudinal wall portions 5A are wound around the widthwise wall portion 5B on the other side.

[0077] Note that even when one side wall portion constituting the peripheral wall 5 is formed of a cylindrical or polygonal prism-shaped bag that is inflated by injecting gas or liquid therein, it is possible to wrap the bottom surface 3 and other wall portions constituting the peripheral wall 5 around the one side wall portion constituting the peripheral wall 5. In this embodiment, the outer shape of the width direction wall portion 5B is illustrated as being cylindrical, but the outer shape of the width direction wall portion 5B can also be, for example, polygonal prism-shaped.

[0078] The housing 2 constituting the anti-sway device 1 of the present invention can also be configured as in the embodiment illustrated in Figures 9 and 10. When the housing 2 of this embodiment is used, the same effects as those of the anti-sway device 1 of the box body 50 and the method of installing the box body 50 in water of the embodiment illustrated in Figures 1 to 5 can be achieved.

[0079] Fig. 9 shows the housing 2 in an assembled state, and Fig. 10 shows the housing 2 with each component separated. As illustrated in Figs. 9 and 10, the waterproof sheet that forms the bottom surface 3 of the housing 2 in this embodiment has a structure in which the waterproof sheet is wrapped in a roll around the outside of a rod-shaped winding core 12 that forms one widthwise wall 5B (the widthwise wall 5B on the lower left side of the paper in Figs. 9 and 10). In this embodiment, the one widthwise wall 5B is formed by multiple layers of waterproof sheet wrapped in a roll around the winding core 12. The bottom surface 3 is formed by a waterproof sheet that is continuous with the waterproof sheet that forms the one widthwise wall 5B and is unwound to the outside of the one widthwise wall 5B.

[0080] The other widthwise wall 5B (the widthwise wall 5B on the upper right side of the paper in Figures 9 and 10) is configured as a tubular bag formed of a waterproof sheet, and the interior space of the bag is configured to be filled with gas or liquid. An inlet 5b is provided in the other widthwise wall 5B. In this embodiment, the pair of longitudinal walls 5A is configured as a pair of segments 6 on one side joined to the widthwise wall 5B on one side, and a pair of segments 6 on the other side joined to the widthwise wall 5B on the other side. The other pair of segments 6 is configured as a membrane-like waterproof sheet, and the other end of each of the other pair of segments 6 is joined to the other widthwise wall 5B. As illustrated in Figure 10, the lower sides of the other pair of segments 6 are provided with folded portions 6b used for joining to the bottom surface 3.

[0081] The pair of divided bodies 6 on one side are made of a membrane-like waterproof sheet, and one end of each of the pair of divided bodies 6 on one side is provided with a folded portion 6b used for joining to the longitudinal wall portion 5A on one side. The lower sides of the pair of divided bodies 6 on one side are each provided with a folded portion 6b used for joining to the bottom surface 3.

[0082] When the housing 2 of this embodiment is installed on the box 50, the length of the bottom surface 3 can be adjusted to a desired length by adjusting the unwound length of the waterproof sheet wound in a roll around the core 12 constituting one of the widthwise wall portions 5B. The other widthwise wall portion 5B is then placed on the other end of the bottom surface 3, and the joint 3a provided on the upper surface of the other end of the bottom surface 3 is joined to the joint 5a provided on the lower surface of the other widthwise wall portion 5B, thereby watertightly joining the other widthwise wall portion 5B to the bottom surface 3. Furthermore, the joint 5a provided on the upper surfaces of the folded portions 6b of the other pair of segments 6 constituting the other side of the pair of longitudinal walls 5A is joined to the joint 3a provided on the lower surface of the bottom surface 3, thereby watertightly joining the other pair of segments 6 to the bottom surface 3.

[0083] Next, one pair of segments 6 constituting one side of the pair of longitudinal walls 5A are placed on the upper surface of one side of the bottom surface 3. Then, joints 5a provided on the lower surfaces of the folded portions of the pair of segments 6 on one side are joined to joints 3a provided on the upper surface of the bottom surface 3, thereby enabling the pair of segments 6 on one side to be watertightly joined to the bottom surface 3. Furthermore, joints 5a provided on the end surfaces of the folded portions 6b on one side of the pair of segments 6 on one side are joined to joints 5a provided on the peripheral surfaces of the widthwise wall 5B on one side, thereby enabling the pair of segments 6 on one side to be watertightly joined to the widthwise wall 5B on one side. Furthermore, by overlapping a portion of the other side of one of the divided bodies 6 on one side with a portion of one side of the other divided body 6 on the other side and joining the joint 5a provided on the outer surface of the divided body 6 on one side with the joint 5a provided on the inner surface of the divided body 6 on the other side, the divided body 6 on one side and the divided body 6 on the other side can be joined watertightly, and the pair of longitudinal walls 5A can be maintained in an upright state. Thereafter, the area defined by the bottom surface 3 and the peripheral wall 5 is filled with the fluid Wb, completing the installation of the container 2.

[0084] When the housing body 2 is configured as in this embodiment, the housing body 2 can be easily resized to a desired size by adjusting the payout length of the waterproof sheet wound in a roll around the core 12 that constitutes one of the widthwise wall sections 5B and, accordingly, adjusting the overlapping range between the segments 6 on one side and the segment 6 on the other side that constitute the pair of longitudinal wall sections 5A. This makes the housing body 2 highly versatile. Furthermore, before installing the housing body 2 in the box 50 or when removing the housing body 2 from the box 50, the waterproof sheet that constitutes the bottom surface 3 can be wrapped in a roll around the core 12 that constitutes one of the widthwise wall sections 5B to make it compact. The other components that make up the housing body 2 can also be packed compactly.

[0085] 9 and 10, the respective joints 3a and 5a in this embodiment, which are indicated by diagonal lines, can be formed of, for example, a hook-and-loop fastener, a magnetic sheet, an adhesive sheet, etc. Although the connector 2a is omitted and not shown in this embodiment, the connector 2a can also be attached to, for example, the divider 6 that constitutes the longitudinal wall 5A. In this embodiment, the outer shape of the widthwise wall 5B is illustrated as a rectangular prism, but the outer shape of the widthwise wall 5B can also be, for example, a cylindrical or polygonal prism.

[0086] The housing 2 constituting the anti-sway device 1 of the present invention can also be configured as in the embodiment shown in Fig. 11. When the housing 2 of this embodiment is used, the same effects as those of the anti-sway device 1 of the box body 50 and the method of installing the box body 50 in water of the embodiment shown in Figs. 1 to 5 can be achieved.

[0087] As shown in FIG. 11 , the pair of longitudinal wall portions 5A and the pair of widthwise wall portions 5B that make up the peripheral wall 5 of the container 2 of this embodiment are each formed from a membrane-like waterproof sheet. The end of the waterproof sheet that makes up the longitudinal wall portions 5A in an upright state is joined to the end of the waterproof sheet that makes up the widthwise wall portions 5B in an upright state. The container 2 of this embodiment has support means 13 that maintains the peripheral wall 5 in an upright state. This embodiment illustrates a case in which the support means 13 is arranged outside the peripheral wall 5. As will be explained later in another embodiment, the support means 13 can also be arranged inside the peripheral wall 5.

[0088] As illustrated in Figure 11, the support means 13 in this embodiment is composed of a protrusion 14 provided at the lower end of the outer surface of the peripheral wall 5, and a plurality of tension members 15 connecting the peripheral wall 5 and the protrusion 14. The protrusion 14 is formed of a sheet-like member and protrudes outward from the lower end of the outer surface of the peripheral wall 5. The protrusion 14 extends along each of the longitudinal wall portions 5A and the widthwise wall portions 5B. In this embodiment, the connectors 2a are attached to the protrusions 14, but it is also possible to configure the connectors 2a to be attached to the peripheral wall 5, for example.

[0089] The tensioning members 15 are formed from sheet-like members, with the upper ends of the tensioning members 15 joined to the upper parts of the outer surfaces of the peripheral wall 5 and the lower ends of the tensioning members 15 joined to the upper surfaces of the protruding portions 14 at positions spaced outward from the peripheral wall 5. A plurality of tensioning members 15 are arranged at intervals in the longitudinal direction of each of the longitudinal wall portions 5A and the widthwise wall portions 5B. The sheet-like members constituting the protruding portions 14 and the tensioning members 15 may be made of a waterproof sheet, or may be made of a material other than a waterproof sheet.

[0090] When the container 2 is placed on the box body 50, each tensioning member 15 is in a tensioned state, and the upper portions of each longitudinal wall portion 5A and widthwise wall portion 5B are pulled toward the outside of the container 2 by the multiple tensioning members 15, thereby maintaining each longitudinal wall portion 5A and widthwise wall portion 5B in an upright state.

[0091] In this embodiment, the lower end of the tensioning member 15 is configured to be detachable from the protrusion 14, and before installing the housing body 2 in the box 50 or when removing the housing body 2 from the box 50, the connection between the lower end of the tensioning member 15 and the protrusion 14 can be released to release the longitudinal wall portions 5A and the width direction wall portions 5B from their upright state. When the longitudinal wall portions 5A and the width direction wall portions 5B are released from their upright state, they can be folded, allowing the housing body 2 to be packed up compactly.

[0092] When the housing body 2 is configured to have support means 13 as in this embodiment, the support means 13 can maintain the peripheral wall 5 in an upright state even when the peripheral wall 5 is configured from a membrane-like waterproof sheet. In particular, when the support means 13 is configured from sheet-like protrusions 14 and sheet-like tension members 15 as in this embodiment, the housing body 2 can have an extremely simple structure, and can be folded up very compactly when transporting the housing body 2 or when removing the housing body 2 from the box 50. Furthermore, this housing body 2 can be manufactured very easily.

[0093] While this embodiment has been described as being exemplified as an example in which the lower end of the tension member 15 is detachable from the protrusion 14, it is also possible to configure the upper end of the tension member 15 to be detachable from the peripheral wall 5, for example. In this case as well, by releasing the connection between the upper end of the tension member 15 and the peripheral wall 5, the longitudinal wall portions 5A and the widthwise wall portions 5B can be released from their upright positions. The tension member 15 can also be configured to be detachable from the protrusion 14 and the peripheral wall 5. In this case as well, by removing the tension member 15 from the protrusion 14 and the peripheral wall 5, the longitudinal wall portions 5A and the widthwise wall portions 5B can be released from their upright positions.

[0094] The housing 2 constituting the anti-sway device 1 of the present invention can also be configured as in the embodiment shown in Fig. 12. In this embodiment, the configuration of the support means 13 is different from that of the embodiment shown in Fig. 11. The other configurations are the same as those of the housing 2 of the embodiment shown in Fig. 11. When the housing 2 of this embodiment is used, it is possible to achieve the same effects as the anti-sway device 1 of the box body 50 and the method of installing the box body 50 in water of the embodiment shown in Figs. 1 to 5.

[0095] As illustrated in Fig. 12, the support means 13 of this embodiment is configured to include a protrusion 14, an insertion member 16, a through-hole member 17, and a reinforcing member 18. The configuration of the protrusion 14 is the same as that of the embodiment illustrated in Fig. 11. The reinforcing member 18 is configured, for example, as a rod-shaped member or a plate-shaped member made of resin or a lightweight metal (e.g., aluminum, etc.). In this embodiment, a round bar with a circular cross section is used as the reinforcing member 18, but, for example, a square bar or a plate-shaped member with a polygonal cross section can also be used as the reinforcing member 18.

[0096] The insertion member 16 is made of a sheet-like material and is formed into a tubular shape. The insertion member 16 is arranged near the outer surface of the peripheral wall 5, and the lower end of the insertion member 16 is fixed to the upper surface of the protrusion 14. The insertion member 16 is structured so that the lower end of the reinforcing member 18 can be inserted into it. The insertion member 17 is made of a sheet-like material and is attached to the outer surface of the peripheral wall 5. The insertion member 17 is structured so that the reinforcing member 18 can be inserted into it. The insertion member 17 is arranged above the insertion member 16. The sheet-like material that makes up the insertion member 16 and the insertion member 17 may be made of a waterproof sheet, or may be made of a material other than a waterproof sheet.

[0097] When the reinforcing member 18 is inserted from above the inserting member 17, the middle portion of the reinforcing member 18 is inserted into the inserting member 17, and the lower end of the reinforcing member 18 is inserted into the inserting member 16, the reinforcing member 18 is in an upright state along the peripheral wall 5. The peripheral wall 5 is supported by the inserting member 16, the inserting member 17, and the reinforcing member 18, so that the upright state of the peripheral wall 5 is maintained. When the reinforcing member 18 is pulled out from the inserting member 16 and the inserting member 17, the upright state of the peripheral wall 5 is released. In this embodiment, units each composed of the inserting member 16, two inserting members 17 arranged spaced apart from each other above and below, and one reinforcing member 18 are disposed at multiple locations along the longitudinal wall 5A and the widthwise wall 5B at intervals.

[0098] When the support means 13 is configured with the insertion member 16, the insertion member 17, and the reinforcing member 18 as in this embodiment, the housing body 2 can be made to have a very simple structure. When installing the housing body 2 on the box body 50, the peripheral wall 5 can be erected simply by inserting the reinforcing member 18 into the insertion member 17 and the insertion member 16. Furthermore, when removing the housing body 2, the longitudinal wall portion 5A and the width direction wall portion 5B can be folded simply by pulling the reinforcing member 18 out of the insertion member 17 and the insertion member 16, thereby allowing the housing body 2 to be compactly folded. Therefore, the installation and removal of the housing body 2 can be performed very easily and in a short time. This housing body 2 can be manufactured very easily.

[0099] The housing 2 constituting the anti-sway device 1 of the present invention can also be configured as in the embodiment shown in Fig. 13. In this embodiment, the configuration of the support means 13 is different from that of the embodiment shown in Fig. 11. The other configurations are the same as those of the housing 2 of the embodiment shown in Fig. 11. When the housing 2 of this embodiment is used, it is possible to achieve the same effects as the anti-sway device 1 of the box body 50 and the method of installing the box body 50 in water of the embodiment shown in Figs. 1 to 5.

[0100] As illustrated in Figure 13, the support means 13 of this embodiment is composed of a crushed stone storage section 19 provided on the outside of the storage body 2. The crushed stone storage section 19 is formed in a bag shape with an open top and is attached to the outer surface of the peripheral wall 5. The crushed stone storage section 19 is formed from a sheet-like material. The crushed stone storage section 19 is structured so that multiple crushed stones 20 can be stored inside. An open / close door 19a is provided at the bottom of the crushed stone storage section 19. In this embodiment, the crushed stone storage sections 19 are arranged at multiple locations at intervals in the longitudinal direction of each of the longitudinal wall sections 5A and the widthwise wall sections 5B.

[0101] When multiple crushed stones 20 are poured into the crushed stone storage section 19 from above and the multiple crushed stones 20 are stored inside the crushed stone storage section 19, the peripheral wall 5 is supported by the multiple crushed stones 20 stored inside the crushed stone storage section 19, thereby maintaining the peripheral wall 5 in an upright position. When the opening / closing door 19a is opened and the crushed stones 20 stored inside the crushed stone storage section 19 are discharged from the crushed stone storage section 19, the upright position of the peripheral wall 5 is released. The crushed stones 20 stored in the crushed stone storage section 19 can be the same as the crushed stones 20 poured into the hollow section 51 after the box body 50 is installed.

[0102] When the support means 13 is configured as the crushed stone storage section 19 as in this embodiment, the storage body 2 can have a very simple structure, and when installing the storage body 2 on the box body 50, the peripheral wall 5 can be erected simply by putting crushed stone 20 into the crushed stone storage section 19. Furthermore, the crushed stone 20 stored in the crushed stone storage section 19 can be used as a weight to fix the storage body 2 to the box body 50, so the storage body 2 can be easily fixed to the box body 50.

[0103] Furthermore, when removing the container 2 from the box 50, simply discharging the crushed stone 20 from the crushed stone storage section 19 releases the peripheral wall 5 from its upright position, and the container 2 can also be released from its fixed position relative to the box 50. Since each of the longitudinal wall sections 5A and widthwise wall sections 5B can be folded, the container 2 can be made compact. Therefore, the installation and removal of the container 2 can be performed very easily and in a short time. The crushed stone 20 discharged from the crushed stone storage section 19 can be easily disposed of by pouring it into the hollow section 51 of the box 50. This container 2 can be manufactured very easily.

[0104] The container 2 constituting the swing prevention device 1 of the present invention can also be configured as in the embodiment illustrated in Fig. 14. In this embodiment, a support means 13 is provided on the inside of the peripheral wall 5.

[0105] As shown in Fig. 14, the container 2 of this embodiment has a structure in which a waterproof sheet is formed into a rectangular parallelepiped shape. That is, the container 2 of this embodiment has a bottom surface 3, peripheral walls 5 (a pair of longitudinal walls 5A and a pair of widthwise walls 5B), and top cover 8, which are each formed from a membrane-like waterproof sheet. Fig. 14 shows a state in which a portion of the top cover 8 is cut away, but in reality, the entire top of the container 2 is covered by the top cover 8.

[0106] In this embodiment, partitions 21 are provided inside the peripheral wall 5 as support means 13 for maintaining the peripheral wall 5 in an upright state. The partitions 21 are made of a mesh-like material that is permeable to the fluid Wb contained in the container 2. The partitions 21 are formed, for example, from a resin or a lightweight metal (e.g., aluminum). The partitions 21 are formed to have substantially the same dimensions as the widthwise wall 5B. The partitions 21 are erected on the bottom surface 3. The bottom of the partitions 21 is joined to the bottom surface 3, and the sides of the partitions 21 are joined to the inner surfaces of the peripheral wall 5 (longitudinal wall 5A). In this embodiment, the partitions 21 are arranged at multiple locations spaced apart inside the peripheral wall 5. The partitions 21 support the peripheral wall 5, thereby maintaining the peripheral wall 5 in an upright state.

[0107] In this embodiment, before installing the container 2 in the case 50 or when removing the container 2 from the case 50, the container 2 can be collapsed so that the pair of widthwise walls 5B are brought closer to each other without containing the fluid Wb inside the container 2, thereby allowing the container 2 to be compactly packed. When installing the container 2 on the case 50, the pair of widthwise walls 5B of the container 2 in the collapsed state are moved away from each other to elongate the container 2 into a rectangular parallelepiped shape, as illustrated in FIG. 14 , whereby the container 2 is maintained in its rectangular parallelepiped shape by the partition 21. Then, the fluid Wb is injected into the container 2 through the inlet 10a provided in the top cover 8, thereby completing the installation of the container 2. The partition 21 is made of a mesh-like material that is permeable to the fluid Wb, and therefore does not impede the flow of the fluid Wb inside the container 2. The container 2 is configured so that the fluid Wb contained in the container 2 can be discharged from two drainage ports 10b provided on the side of the container 2.

[0108] The housing 2 constituting the anti-sway device 1 of the present invention can also be configured as in the embodiment shown in Figure 15. In this embodiment, the shape of the housing 2 and the shape of the partition wall 21 constituting the support means 13 are different from those of the embodiment shown in Figure 14. The other configurations are the same as those of the housing 2 in the embodiment shown in Figure 14. When the housing 2 of this embodiment is used, it is possible to achieve the same effects as the anti-sway device 1 of the box 50 and the method of installing the box 50 in water in the embodiment shown in Figures 1 to 5.

[0109] As illustrated in FIG. 15 , the container 2 of this embodiment has a structure in which the protective sheet is formed into a triangular prism shape. The widthwise wall 5B of the container 2 of this embodiment is triangular, and the partition 21 is also triangular with approximately the same dimensions as the widthwise wall 5B. The longitudinal wall 5A of the container 2 is inclined, and the upper ends of the pair of longitudinal wall 5A are joined together. The bottom of the partition 21 is joined to the bottom surface 3, and the side of the partition 21 is joined to the inner surface of the peripheral wall 5 (longitudinal wall 5A). In this embodiment, the partitions 21 are disposed at multiple locations on the inner side of the peripheral wall 5 at intervals. The partitions 21 support the peripheral wall 5, so that the peripheral wall 5 is maintained in an upright, oblique position. In this embodiment, a liquid inlet 10a is provided at the upper part of the longitudinal wall 5A, and a liquid outlet 10b is provided at the lower part of the longitudinal wall 5A.

[0110] In this embodiment, before installing the container 2 in the case 50 or when removing the container 2 from the case 50, the container 2 can be collapsed so that the pair of widthwise walls 5B are closer to each other without containing the fluid Wb inside the container 2, thereby allowing the container 2 to be compactly packed. When installing the container 2 on the case 50, the pair of widthwise walls 5B of the container 2 in the collapsed state are moved away from each other, stretching the container 2 into a triangular prism shape as illustrated in FIG. 15 , thereby maintaining the container 2 in its triangular prism shape by the partition 21. Then, the fluid Wb is injected into the container 2 through the inlet 10a provided in the top cover 8, thereby completing the installation of the container 2. The partition 21 is made of a mesh-like material that is permeable to the fluid Wb, and therefore does not impede the flow of the fluid Wb inside the container 2.

[0111] When the housing body 2 is formed in a triangular prism shape as in this embodiment, the cross section of the housing body 2 becomes truss-shaped, which makes it less likely for the shape of the housing body 2 to collapse even when the peripheral wall 5 of the housing body 2 is formed from a waterproof membrane sheet. Furthermore, providing a triangular partition 21 inside the peripheral wall 5 is advantageous in maintaining the shape of the housing body 2 more stably.

[0112] The housing 2 constituting the anti-sway device 1 of the present invention can also be configured as in the embodiment shown in Figures 16 to 18. In this embodiment, the configuration of the support means 13 is different from that of the embodiment shown in Figure 11. The other configurations are the same as those of the housing 2 of the embodiment shown in Figure 11. When using the housing 2 of this embodiment, it is possible to achieve the same effects as the anti-sway device 1 of the box body 50 and the method of installing the box body 50 in water of the embodiment shown in Figures 1 to 5.

[0113] 16 to 18, in this embodiment, a support means 13 is provided on the outside of the peripheral wall 5 of the container 2. As illustrated in FIGS. 16 and 17, in this embodiment, the container section 2b that contains the fluid Wb of the container 2 and the support means 13 are structured to be separable. The support means 13 in this embodiment is configured to include an outer frame member 22, a support frame member 23, a support membrane member 24, and a bridging member 26.

[0114] The outer frame member 22 has a bottom surface 22a and peripheral walls 22b formed from sheet-like materials. In this embodiment, the bottom surface 22a of the outer frame member 22 is formed from a film-like sheet-like material that is rectangular in plan view. A pair of longitudinal wall portions and a pair of widthwise wall portions that constitute the peripheral wall 22b of the outer frame member 22 are each formed from a film-like sheet-like material. Ends of the sheet-like material that constitute the longitudinal wall portions of the peripheral wall 22b in an upright state are joined to ends of the sheet-like material that constitute the widthwise wall portions of the peripheral wall 22b in an upright state. The pair of longitudinal wall portions and the pair of widthwise wall portions that constitute the peripheral wall 22b of the outer frame member 22 are each inclined inward of the outer frame member 22 from the lower end to the upper end.

[0115] The support frame members 23 are reinforcing members that maintain the peripheral walls 22b of the outer frame member 22 in an upright state, and are composed of L-shaped sheet-like members. The support frame members 23 are arranged inside the peripheral walls 22b of the outer frame member 22. The bottom surfaces of the support frame members 23 are joined to the bottom surface 22a of the outer frame member 22, and the side surfaces of the support frame members 23 are joined to the inner surfaces of the peripheral walls 22b of the outer frame member 22. The support frame members 23 are configured to be detachable from the outer frame member 22. A plurality of support frame members 23 are arranged at intervals inside each of a pair of longitudinal wall portions and a pair of width wall portions that constitute the peripheral walls 22b of the outer frame member 22.

[0116] The support film member 24 is made of a sheet-like member. In this embodiment, the support film member 24 is made of a mesh-like member. The support film member 24 is arranged inside the peripheral wall 22b of the outer frame member 22. The lower end of the support film member 24 is joined to the bottom surface 22a of the outer frame member 22, and the upper end of the support film member 24 is joined to the inner surface of the peripheral wall 22b of the outer frame member 22. The support film member 24 is fixed in a state inclined toward the outside of the outer frame member 22 from the lower end to the upper end. A plurality of support film members 24 are arranged at intervals inside each of a pair of longitudinal wall portions and a pair of width wall portions that make up the peripheral wall 22b of the outer frame member 22.

[0117] In this embodiment, an opening 25 is provided in the center of the bottom surface 22a of the outer frame member 22, and a bridging member 26 is installed from one end of the opening 25 to the other end. The bridging member 26 is made of a string-like or band-like member and is configured so that its length can be changed. In this embodiment, multiple bridging members 26 extending in the width direction of the outer frame member 22 are arranged at intervals in the longitudinal direction of the outer frame member 22.

[0118] In this embodiment, the container 2b that contains the fluid Wb has a membrane-like bottom surface 3 and a membrane-like peripheral wall 5 formed from a waterproof sheet. The container 2b, which has the bottom surface 3 and peripheral wall 5, is disposed inside the outer frame member 22, which is provided with the support frame member 23, the support membrane member 24, and the bridging member 26. The container 2b is fixed to the outer frame member 22 by joining the joint 5a provided at the top of the peripheral wall 5 to the joint 22c provided at the top of the outer surface of the peripheral wall 22b of the outer frame member 22, thereby forming the container body 2. The joints 5a and 22c can be formed from, for example, hook-and-loop fasteners, magnetic sheets, or adhesive sheets.

[0119] 16 and 18, in this embodiment, with the storage section 2b installed inside the outer frame member 22, the fluid Wb is stored in a non-filled state in the area defined by the bottom surface 3 and the peripheral wall 5. The outer frame member 22, which is provided with the support frame members 23, the support membrane members 24, and the bridging members 26, keeps the peripheral wall 5 of the storage section 2b in an upright state.

[0120] In this embodiment, before installing the container 2 in the housing 50 or when removing the container 2 from the housing 50, the container 2b can be compactly folded by folding the membrane-like bottom surface 3 and peripheral wall 5 of the container 2b with no fluid Wb contained inside the container 2b. In this embodiment, the support means 13 removes the support frame member 23 and the support membrane member 24 from the outer frame member 22, thereby enabling the outer frame member 22 to be folded. Therefore, the container 2b, the outer frame member 22, and the bridging member 26 attached to the outer frame member 22, which constitute the container 2, can be compactly folded. The support frame member 23 and the support membrane member 24 can also be compactly folded.

[0121] When installing the container 2 on the box 50, the outer frame member 22 is expanded, and the support frame member 23 and the support membrane member 24 are installed on the outer frame member 22, thereby constructing the support means 13. Then, the container section 2b is installed inside the outer frame member 22, and the fluid Wb is poured into the container section 2b, thereby completing the installation work of the container 2.

[0122] When the support means 13 is configured as in this embodiment, the container 2 has a membrane-like bottom surface 3 and a membrane-like peripheral wall 5, and the container 2b is supported by the outer frame member 22, so that the peripheral wall 5 of the container 2b can be maintained in a stable, upright position. Furthermore, in this embodiment, the container 2b that contains the fluid Wb and the support means 13 are separable. Therefore, even if a hole is made in the bottom surface 3 or peripheral wall 5 of the container 2b, for example, it is only necessary to repair or replace the container 2b, and there is no need to repair or replace the support means 13. Therefore, this container 2 is excellent in terms of maintainability.

[0123] In this embodiment, when the outer frame member 22 is provided with the support frame members 23, the peripheral wall 22b of the outer frame member 22 can be more stably maintained in an upright state by the support frame members 23, which is more advantageous for maintaining the peripheral wall 5 of the storage section 2b in a stably upright state. When the outer frame member 22 is provided with the support film members 24, the peripheral wall 22b of the outer frame member 22 can be more stably maintained in an upright state by the support film members 24, which is more advantageous for maintaining the peripheral wall 5 of the storage body 2 in a stably upright state. When the outer frame member 22 is provided with the bridging members 26, the width of the outer frame member 22 can be changed to a desired width by changing the length of the bridging members 26. This makes it possible to adjust the size of the storage section 2b.

[0124] The housing 2 constituting the anti-sway device 1 of the present invention can also be configured as in the embodiment shown in Figures 19 to 21. In this embodiment, the configuration of the support means 13 is different from that of the embodiment shown in Figures 16 to 18. The other configurations are the same as those of the housing 2 of the embodiment shown in Figures 16 to 18. When using the housing 2 of this embodiment, it is possible to achieve the same effects as the anti-sway device 1 of the box body 50 and the method of installing the box body 50 in water in the embodiment shown in Figures 1 to 5.

[0125] As illustrated in Figures 19 to 21, in this embodiment, support means 13 is provided on the outside of the peripheral wall 5 of the container 2. As illustrated in Figures 19 and 20, in this embodiment, the container section 2b that contains the fluid Wb of the container 2 and the support means 13 are separable. The container section 2b in this embodiment is configured to have a membrane-like bottom surface 3 and a membrane-like peripheral wall 5 formed from a waterproof sheet. As illustrated in Figure 20, the support means 13 in this embodiment is configured to have longitudinally separate tube bodies 27A, widthwise separate tube bodies 27B, and a bottom member 27C.

[0126] The longitudinally separate tube bodies 27A are arranged to extend in the longitudinal direction of the housing body 2 and are configured to support the longitudinal wall portions 5A of the peripheral wall 5. In this embodiment, multiple longitudinally separate tube bodies 27A are connected in the longitudinal direction of the housing body 2. The widthwise separate tube bodies 27B are arranged to extend in the width direction of the housing body 2 and are configured to support the widthwise wall portions 5B of the peripheral wall 5. Two sets of multiple connected longitudinally separate tube bodies 27A are arranged spaced apart in the width direction of the housing body 2, and two widthwise separate tube bodies 27B are arranged spaced apart in the longitudinal direction of the housing body 2. The longitudinal ends of adjacent longitudinally separate tube bodies 27A and the longitudinal ends (in the width direction of the housing body 2) of the widthwise separate tube bodies 27B are respectively connected, and the multiple longitudinally separate tube bodies 27A and widthwise separate tube bodies 27B form a frame that is rectangular in plan view. A bottom member 27C that is rectangular in plan view is laid below this frame. In this embodiment, a longitudinally divided tube member 27A and a widthwise divided tube member 27B are adhered onto a bottom surface member 27C.

[0127] As illustrated in FIGS. 20 and 21 , the longitudinally divided tube body 27A and the widthwise divided tube body 27B have a tube structure that is inflated by injecting gas therein. In this embodiment, the longitudinally divided tube body 27A and the widthwise divided tube body 27B are configured with a bag-shaped cover member 28 and an inner bag member 29 provided inside the cover member 28. In this embodiment, the longitudinally divided tube body 27A has two rectangular parallelepiped inner bag members 29 stacked one above the other inside the rectangular parallelepiped cover member 28 when inflated. In the widthwise divided tube body 27B, one rectangular parallelepiped inner bag member 29 is provided inside the rectangular parallelepiped cover member 28 when inflated. The cover member 28 may be formed, for example, from a resin sheet member. The inner bag member 29 may be formed, for example, from a stretchable rubber or resin sheet member. In addition, the longitudinally divided tube body 27A and the widthwise divided tube body 27B can each be configured so that one inner bag member 29 is installed inside the cover member 28, or so that multiple inner bag members 29 are installed inside the cover member 28.

[0128] An injection port 30 is provided on the outside of the cover member 28, and is used to inject and exhaust gas into and from the inner bag member 29. The injection port 30 provided on the cover member 28 is configured to be connectable to the injection port provided on the inner bag member 29. The cover member 28 is provided with a fastener 28a, allowing the inner bag member 29 housed in the cover member 28 to be replaced. Connectors 31 are provided at the longitudinal ends of each longitudinally separate tube body 27A and the longitudinal (widthwise) ends of each widthwise separate tube body 27B. By connecting the connectors 31 to each other, the longitudinally separate tube bodies 27A and the longitudinally separate tube body 27A and the widthwise separate tube body 27B can be detachably connected to each other. In this embodiment, the connector 31 is configured as a buckle. The connector 31 is not limited to a buckle, and other metal fittings can be used. Instead of the connector 31, for example, a string-like member can be provided.

[0129] As shown in Figure 21, in this embodiment, adhesive members 34 are provided at positions where the longitudinally divided tube body 27A and the widthwise divided tube body 27B abut, allowing for detachable surface adhesion between the outer surfaces of the longitudinally divided tube body 27A and the widthwise divided tube body 27B. Adhesive members 34 are also provided at positions where the longitudinally divided tube bodies 27A abut. Adhesive members 34 are also provided on the top surface of the bottom member 27C at positions where the longitudinally divided tube body 27A and the widthwise divided tube body 27B abut, allowing for detachable surface adhesion between the bottom member 27C and the longitudinally divided tube body 27A and the widthwise divided tube body 27B. The adhesive members 34 can be formed, for example, from a hook-and-loop fastener, a magnetic sheet, or an adhesive sheet.

[0130] The bottom surface member 27C may be made of a sheet member (specifically, for example, a rubber mat) made of rubber or resin with a high coefficient of friction. Increasing the friction between the top surface (top lid 54) of the box body 50 and the bottom surface member 27C can prevent the housing body 2 (support means 13) from moving on the box body 50 (top lid 54) due to the friction of the bottom surface member 27C. In other words, the bottom surface member 27C functions as an anti-slip device for the housing body 2. The support means 13 (longitudinal separate tube bodies 27A and widthwise separate tube bodies 27B) may also be fixed to the box body 50 using ropes or the like.

[0131] 20, perforated belts 32 used to secure the storage section 2b to the support means 13 are provided on the upper portions of each of the longitudinally divided tube bodies 27A and the widthwise divided tube bodies 27B. A large number of holes are formed in the perforated belts 32. A large number of connecting holes 5c used to secure the storage section 2b to the support means 13 are formed on the outer periphery of the storage section 2b.

[0132] 19 , in this embodiment, when installing the container 2 in the housing 50, the support means 13 assembled using the longitudinally divided tube members 27A, the widthwise divided tube members 27B, and the bottom member 27C is placed on the housing 50. Then, the sheet-like container 2b is placed on top of the support means 13, and the container 2b is fixed to the support means 13 using the holes in the perforated belt 32, the connecting holes 5c in the container 2b, and the connecting member 33. For example, a cable tie or a string-like member can be used as the connecting member 33. Thereafter, the fluid Wb is poured into the container 2b, thereby completing the installation of the container 2.

[0133] The peripheral wall 5 of the storage section 2b is maintained in an upright state by the support means 13, which is made up of the longitudinally divided tube body 27A, the widthwise divided tube body 27B, and the bottom surface member 27C. The work of inflating the longitudinally divided tube body 27A and the widthwise divided tube body 27B, and the work of assembling the support means 13 using the longitudinally divided tube body 27A, the widthwise divided tube body 27B, and the bottom surface member 27C may be performed on the box 50 or at a location other than the box 50.

[0134] When removing the container 2 from the housing 50, the fluid Wb stored in the housing section 2b is discharged to the outside. Next, the connection between the support means 13 and the housing section 2b by the connecting member 33 is released, and the housing section 2b is removed from the support means 13. After that, the connections and adhesions between the longitudinally separate tube bodies 27A and between the longitudinally separate tube bodies 27A, the widthwise separate tube bodies 27B, and the bottom member 27C are released, and the longitudinally separate tube bodies 27A, the widthwise separate tube bodies 27B, and the bottom member 27C are separated. Then, the gas stored in the inner bag members 29 of the longitudinally separate tube bodies 27A and the widthwise separate tube bodies 27B is discharged to the outside through the inlet 30. Then, the longitudinally separate tube bodies 27A, the widthwise separate tube bodies 27B, the bottom member 27C, and the housing section 2b are removed from the housing 50.

[0135] In this embodiment, before installing the housing body 2 in the case 50 or when removing the housing body 2 from the case 50, the longitudinally divided tube bodies 27A and the widthwise divided tube bodies 27B are collapsed, so that the longitudinally divided tube bodies 27A, widthwise divided tube bodies 27B and bottom member 27C that make up the support means 13, and the housing section 2b can each be folded compactly. Furthermore, the housing body 2 of this embodiment is very useful to those skilled in the art because installation and removal can be performed easily and in a short time.

[0136] When the support means 13 is configured as in this embodiment, the storage section 2b is stably supported by the longitudinally divided tube body 27A, the widthwise divided tube body 27B, and the bottom member 27C, maintaining the peripheral wall 5 of the storage section 2b in a stable, upright position. Furthermore, because the storage section 2b and the support means 13 are separable, even if a hole develops in the storage section 2b, repair or replacement of only the storage section 2b is necessary, and there is no need to repair or replace the support means 13. Even if the longitudinally divided tube body 27A or the widthwise divided tube body 27B is damaged, only the damaged part needs to be replaced; the remaining undamaged parts can be used without replacement. Therefore, this storage section 2 is easy to maintain.

[0137] Furthermore, with the support means 13 of this embodiment, the size of the container 2 can be easily changed by changing the number of longitudinally divided tube bodies 27A or widthwise divided tube bodies 27B that are connected. For example, by preparing and combining multiple types of longitudinally divided tube bodies 27A and widthwise divided tube bodies 27B with different lengths, it becomes possible to more precisely adjust the size of the container 2. This makes it highly versatile.

[0138] While this embodiment illustrates the storage section 2b in which the waterproof sheet is three-dimensionally processed to match the shape of the support means 13, it is also possible to use a storage section 2b in which the waterproof sheet is not three-dimensionally processed. The methods for connecting the longitudinally separate tube bodies 27A to each other and between the longitudinally separate tube body 27A and the widthwise separate tube body 27B, the methods for bonding the longitudinally separate tube body 27A and the widthwise separate tube body 27B to the bottom member 27C, and the methods for fixing the storage section 2b to the longitudinally separate tube body 27A and the widthwise separate tube body 27B are not limited to the above-described configurations and various other configurations are possible. For example, the longitudinally separate tube body 27A and the widthwise separate tube body 27B may be bonded to the storage section 2b using hook-and-loop fasteners, magnetic sheets, adhesive sheets, etc.

[0139] The support means 13 of this embodiment can be configured, for example, without providing the bottom surface member 27C, so that the bottom surface 3 of the storage section 2b rests on the upper surface (top cover 54) of the box body 50. In this case, it is advisable to provide a rubber or resin sheet member with a high friction coefficient to prevent slipping on the bottom surfaces of the longitudinally divided tube body 27A and the widthwise divided tube body 27B.

[0140] The housing 2 constituting the anti-sway device 1 of the present invention can also be configured as in the embodiment shown in Figures 22 to 24. In this embodiment, the configuration of the support means 13 is different from that of the embodiment shown in Figures 16 to 18. The other configurations are the same as those of the housing 2 of the embodiment shown in Figures 16 to 18. When using the housing 2 of this embodiment, it is possible to achieve the same effects as the anti-sway device 1 of the box body 50 and the method of installing the box body 50 in water of the embodiment shown in Figures 1 to 5.

[0141] As illustrated in Figures 22 and 23, in this embodiment, support means 13 is provided on the outside of peripheral wall 5 of container 2. In this embodiment, container section 2b that contains fluid Wb in container 2 and support means 13 are separable. Container section 2b in this embodiment is configured to have a membrane-like bottom surface 3 and membrane-like peripheral wall 5 formed from a waterproof sheet. As illustrated in Figure 23, support means 13 in this embodiment is configured to have a longitudinally divided sheet body 35A, a widthwise divided sheet body 35B, and a bottom member 35C.

[0142] The longitudinally separated sheet body 35A extends in a taut position along the longitudinal direction of the container 2, supporting the longitudinal wall portions 5A of the peripheral wall 5. In this embodiment, a plurality of longitudinally separated sheet bodies 35A are connected in the longitudinal direction of the container 2. The widthwise separated sheet body 35B extends in a taut position along the width of the container 2, supporting the widthwise wall portions 5B of the peripheral wall 5. Two sets of connected longitudinally separated sheet bodies 35A are spaced apart in the width direction of the container 2, and two widthwise separated sheet bodies 35B are spaced apart in the longitudinal direction of the container 2. The longitudinal ends of adjacent longitudinally separated sheet bodies 35A are connected to the widthwise ends of widthwise separated sheet bodies 35B, respectively, forming a rectangular ring-shaped frame in plan view composed of the longitudinally separated sheet bodies 35A and widthwise separated sheet bodies 35B. A bottom member 35C having a rectangular shape in plan view is laid beneath the frame.

[0143] The longitudinally divided sheet body 35A and the widthwise divided sheet body 35B are made of, for example, a resin sheet member. Connecting belts 38 are provided at the longitudinal end of each of the longitudinally divided sheet body 35A and the longitudinal end (width direction of the container 2) of each of the widthwise divided sheet body 35B. As illustrated in FIGS. 23 and 24, the connecting belts 38 are made of a sheet-like member, and a tubular portion formed into a tubular shape is provided at the end of the connecting belt 38. The tubular portion of the connecting belt 38 is configured to allow a rod-shaped member 39 to be inserted therein. The rod-shaped member 39 is made of, for example, a metal pipe or round bar.

[0144] In this embodiment, a support base 40 is installed at a position where the longitudinally divided sheet bodies 35A are connected to each other or where the longitudinally divided sheet body 35A and the widthwise divided sheet body 35B are connected to each other. The support base 40 has a plate-shaped bottom portion that is placed on the box 50 and a tubular portion provided on the bottom portion. The tubular portion of the support base 40 is configured to allow the lower ends of rod-shaped members 39 to be inserted. At the position where the longitudinally divided sheet bodies 35A are connected to each other, the tubular portions of the connecting belts 38 provided at the ends of adjacent longitudinally divided sheet bodies 35A are placed on the tubular portion of the support base 40. Then, the rod-shaped members 39 are inserted from above the tubular portions of the two sets of connecting belts 38, so that the lower ends of the rod-shaped members 39 are inserted into the tubular portions of the support base 40. As a result, the ends of adjacent longitudinally separated sheet bodies 35A are connected to each other via the rod-shaped members 39 in an upright position.

[0145] At the position where the longitudinally divided sheet body 35A and the widthwise divided sheet body 35B are connected, the tubular portions of the connecting belts 38 provided at the ends of the longitudinally divided sheet body 35A and the tubular portions of the connecting belts 38 provided at the ends of the widthwise divided sheet body 35B are placed on the tubular portions of the support base 40. Then, rod-shaped members 39 are inserted into the tubular portions of the connecting belts 38 from above the tubular portions of the two sets of connecting belts 38, so that the lower ends of the rod-shaped members 39 are inserted into the tubular portions of the support base 40. This connects the end of the longitudinally divided sheet body 35A and the end of the widthwise divided sheet body 35B via the upright rod-shaped members 39.

[0146] In the support means 13 of this embodiment, the longitudinally divided sheet body 35A and the widthwise divided sheet body 35B are supported by the support bases 40 and the rod-shaped members 39, thereby maintaining a taut state between the longitudinally divided sheet body 35A and the widthwise divided sheet body 35B. In this embodiment, units of the support bases 40 and the rod-shaped members 39 are disposed at multiple locations at intervals in the longitudinal and width directions of the container 2 (support means 13). The distance between the units of the support bases 40 and the rod-shaped members 39, in other words, the length of the longitudinally divided sheet body 35A and the widthwise divided sheet body 35B, may be set to, for example, 1 m or more and 6 m or less.

[0147] In this embodiment, a unit of the support base 40 and rod-shaped members 39 arranged at the corners of the support means 13 is provided with a reinforcing frame 41 that reinforces the corners (four corners) of the support means 13. A rubber or resin sheet member (specifically, a rubber mat, for example) with a high coefficient of friction may be provided on the bottom surface of the support base 40 to prevent slippage. Similarly, the bottom member 35C may be formed of a rubber or resin sheet member with a high coefficient of friction. By increasing the friction between the bottom surface of the support base 40 and the bottom member 35C and the top surface (top cover 54) of the box 50, movement of the container 2 (support means 13) on the box 50 can be suppressed. In this embodiment, a fixing rope 42 that fixes the support means 13 to the box 50 is connected to the unit of the support base 40 and rod-shaped members 39 arranged at the corners of the support means 13. The reinforcing frame 41 and the fixing rope 42 can be provided as needed.

[0148] 23, a number of connecting holes 36 used to secure the storage section 2b to the support means 13 are formed in the upper part of each of the longitudinally divided sheet body 35A and the widthwise divided sheet body 35B. A number of connecting holes 5c used to secure the storage section 2b to the support means 13 are formed in the outer peripheral edge of the upper part of the storage section 2b.

[0149] As illustrated in FIG. 22 , in this embodiment, the operation of installing the container 2 in the box 50 involves assembling the support means 13 on top of the box 50 using the longitudinally divided sheet element 35A, the widthwise divided sheet element 35B, the bottom member 35C, the rod-shaped member 39, the support base 40, and the reinforcing frame 41. Then, the sheet-like container section 2b is placed on top of the support means 13, and the container section 2b is fixed to the support means 13 using the connecting holes 36 provided in the longitudinally divided sheet element 35A and the widthwise divided sheet element 35B, the connecting hole 5c provided in the container section 2b, and the connecting member 37. For example, a cable tie or a string-like member can be used as the connecting member 33. Thereafter, the fluid Wb is poured into the container section 2b, thereby completing the installation of the container 2. The peripheral wall 5 of the storage section 2b is maintained in an upright state by the support means 13, which is composed of a longitudinally divided sheet body 35A, a widthwise divided sheet body 35B, a bottom member 35C, a rod-shaped member 39, a support base 40, and a reinforcing frame 41.

[0150] When removing the container 2, the fluid Wb stored in the container section 2b is discharged to the outside. Next, the connection between the support means 13 and the container section 2b by the connecting members 37 is released, and the container section 2b is removed from the support means 13. Thereafter, the rod-shaped members 39 are pulled upward from their respective support bases 40 to release the connection between the longitudinally divided sheet bodies 35A and between the longitudinally divided sheet body 35A and the widthwise divided sheet body 35B, thereby separating the longitudinally divided sheet body 35A, the widthwise divided sheet body 35B, and the bottom member 35C. Then, the longitudinally divided sheet body 35A, the widthwise divided sheet body 35B, the bottom member 35C, the rod-shaped members 39, the support bases 40, and the reinforcing frame 41 are removed from the box 50.

[0151] In this embodiment, before installing the housing body 2 in the box 50 or when removing the housing body 2 from the box 50, the longitudinally divided sheet body 35A, the widthwise divided sheet body 35B, and the bottom member 35C that make up the support means 13, and the housing section 2b are all in a state that can be folded up compactly. Furthermore, the housing body 2 of this embodiment is very useful to those skilled in the art because installation and removal can be performed easily and in a short time.

[0152] When the support means 13 is configured as in this embodiment, the storage section 2b is stably supported by the longitudinally divided sheet body 35A, the widthwise divided sheet body 35B, and the bottom member 35C, maintaining the peripheral wall 5 of the storage section 2b in a stable, upright position. Furthermore, because the storage section 2b and the support means 13 are separable, even if a hole is developed in the storage section 2b, repair or replacement of the storage section 2b is sufficient, and there is no need to repair or replace the support means 13. Furthermore, even if the longitudinally divided sheet body 35A or the widthwise divided sheet body 35B is damaged, only the damaged parts need to be replaced; the remaining undamaged parts can be used without replacement. Therefore, this storage section 2 is easy to maintain.

[0153] Furthermore, with the support means 13 of this embodiment, the size of the container 2 can be easily changed by changing the number of connected longitudinally divided sheet bodies 35A or widthwise divided sheet bodies 35B. For example, by preparing and combining multiple types of longitudinally divided sheet bodies 35A and widthwise divided sheet bodies 35B with different lengths, it is possible to more precisely adjust the size of the container 2. This makes it highly versatile.

[0154] In this embodiment, the storage section 2b is exemplified by a waterproof sheet that is three-dimensionally processed to match the shape of the support means 13, but it is also possible to use a storage section 2b in which the waterproof sheet is not three-dimensionally processed. For example, the support means 13 of this embodiment can be configured so that the bottom surface 3 of the storage section 2b is placed on the upper surface (upper lid 54) of the box body 50 without providing the bottom surface member 35C.

[0155] The housing 2 constituting the anti-sway device 1 of the present invention can also be configured as in the embodiment shown in Fig. 25. When the housing 2 of this embodiment is used, the same effects as those of the anti-sway device 1 of the box body 50 and the method of installing the box body 50 in water in the embodiment shown in Figs. 1 to 5 can be achieved.

[0156] As illustrated in FIG. 19, the container 2 of this embodiment has a structure in which a protective sheet is formed into a cylindrical shape. In this embodiment, a cylindrical container 2 is illustrated, but the container 2 may also be, for example, a polygonal cylindrical container. In the container 2 of this embodiment, a pair of opposing end faces of the cylindrical container 2 form the widthwise wall portion 5B of the container 2. The lower portion of the circumferential surface of the cylindrical container 2 forms the bottom surface 3 of the container 2, the side portion of the circumferential surface forms the longitudinal wall portion 5A, and the upper portion of the circumferential surface forms the top lid 8. The fluid Wb is contained in a non-filled state in the inner space of the cylindrical container 2. In this embodiment, an inlet / outlet port 10 is provided at the upper portion of the circumferential surface of the cylindrical container 2.

[0157] In this embodiment, a plurality of cylindrical containers 2 are arranged side by side on a box body 50. The plurality of cylindrical containers 2 are then bound together by binding members 43 and fixed onto the box body 50. Although the cylindrical containers 2 can be individually fixed onto the box body 50, using the binding members 43 makes it possible to fix a plurality of cylindrical containers 2 to the box body 50 with less labor. When a plurality of cylindrical containers 2 are arranged, the thickness of each cylindrical container 2 may be set to, for example, 10 cm or more and 100 cm or less, more preferably 20 cm or more and 80 cm or less, and even more preferably 30 cm or more and 60 cm or less.

[0158] In this embodiment, before installing the container 2 in the case 50 or when removing the container 2 from the case 50, the container 2 can be made very compact by folding or rolling up the container 2 without the fluid Wb being stored inside the container 2. When installing the container 2 on the case 50, the container 2 is unfolded, the fluid Wb is injected into the container 2 through the inlet / outlet port 10, and the container 2 is fixed on the case 50, thereby completing the installation work of the container 2.

[0159] When a cylindrical container 2 is used as in this embodiment, the container 2 can be configured very simply, and can be manufactured very easily. The installation and removal of the container 2 can also be performed very easily. Even if the thickness of each cylindrical container 2 is relatively small as in the above-mentioned conditions, by arranging multiple cylindrical containers 2, it is possible to achieve the same effect as when a large container 2 is installed. Furthermore, by changing the number of cylindrical containers 2 installed that make up the oscillation prevention device 1, it becomes possible to apply the device to boxes 50 of various sizes.

[0160] The housings 2 constituting the anti-sway device 1 of the present invention can also be arranged as shown in Fig. 26. In this embodiment, the anti-sway device 1 has a single first-direction housing 2A, which is installed in the center of the Y direction of the box 50. In this anti-sway device 1, the first-direction housing 2A is installed on the center of gravity G of the box 50. Second-direction housings 2B are installed on both sides of the first-direction housing 2A in the X direction, extending from near the end to near the end of the Y direction of the box 50. The other configurations are the same as the arrangement of the anti-sway device 1 of the embodiment shown in Fig. 1.

[0161] 1, it is advantageous to install multiple first direction housings 2A in parallel at intervals from each other in order to enhance the effect of suppressing the swinging of the box 50 in the second direction D2, but even when there is only one first direction housing 2A, as in this embodiment, it is possible to obtain substantially the same effect as the swinging prevention device 1 of the first embodiment. Using only one first direction housing 2A allows the swinging prevention device 1 to be configured more compactly, which is suitable for a relatively small box 50.

[0162] In addition, in the rocking prevention device 1 of the present invention, the first direction D1 can be set as a diagonal direction in a plan view of the box body 50, and the second direction D2 can be set as a diagonal direction intersecting the first direction D1 in a plan view, and the first direction container 2A and the second direction container 2B can be arranged, for example. Even when the first direction D1 and the second direction D2 are set as diagonal directions in a plan view of the box body 50, rocking of the box body 50 in the first direction D1 can be suppressed mainly by the first direction container 2A, and rocking of the box body 50 in the second direction D2 can be suppressed mainly by the second direction container 2B, thereby effectively suppressing rocking of the box body 50 as in the other embodiments described above. If the direction in which the box body 50 is likely to rock can be predicted based on the wave conditions at the installation site and the shape of the box body 50, rocking of the box body 50 can be effectively suppressed by setting the direction in which the box body 50 is likely to rock as the first direction D1.

[0163] The number and arrangement of the housings 2 constituting the swing prevention device 1 are not limited to the embodiment exemplified above, and various other configurations are possible depending on the shape and size of the housing 50. For example, a configuration in which three or more first direction housings 2A are installed in parallel may be used, or a configuration in which three or more second direction housings 2B are installed in parallel may be used. Furthermore, for example, in addition to the first direction housings 2A and the second direction housings 2B, another housing 2 extending in a direction different from the first direction D1 and the second direction D2 in plan view may be installed. [Explanation of symbols]

[0164] 1. Device for preventing the box from swinging 2. Containment Unit 2A First Direction Container 2B Second Direction Container 2a Connector 2b Storage section 3 Bottom 3a joint 4 Divided body (forming the base) 4a Joint 5 Peripheral wall 5A Longitudinal wall 5B Width wall section 5a joint 5b Inlet 5c connection hole 6. Divided body (forming the surrounding wall) 6a Joint 6b Folded part 7 Joint members 8 Top lid 8a joint 9 Divided body (constituting the top cover) 9a Joint 10 Injection / drainage port 10a Filling port 10b Drain port 11 Connecting part 12 Core material 13 Support means 14 Protrusion 15 Tensioning member 16 Insertion member 17 Insertion member 18 Reinforcement member 19 Crushed Stone Storage Section 19a Opening and closing door 20 Crushed Stone 21 Bulkhead 22 Outer frame member 22a Bottom 22b Surrounding wall 22c joint 23 Support frame member 24 Support membrane member 25 Opening 26 Bridge members 27A Longitudinal split tube body 27B Width-direction split tube body 27C Bottom member 28 Cover member 28a zipper 29 Inner bag member 30 Inlet 31 Connector 32 Perforated Belt 33 Connecting member 34 Adhesive material 35A Longitudinal split sheet body 35B Width direction divided sheet body 35C bottom member 36 Connection hole 37 Connecting member 38 Connecting belt 39 Rod-shaped members 40 Support base 41 Reinforcement frame 42 Fixing rope 43 Binding member 50 Caisson 51 Hollow part 52 Exterior Wall 53 Bulkhead 54 (Installed on the box) Top cover 55 (Installed on the box) Connector 60 Fixing wire 70 Wire Rope 71 Fixed part 72 Pulley 80 Horse 90 Existing box Wa: Water contained in the hollow space Wb Fluid contained in the container

Claims

1. A device for preventing swinging of a box body has a container that is installed on the upper surface of a box that is installed underwater and that contains a fluid, the container is not filled with the fluid, and when the box body swings and tilts, the fluid flows inside the container body downward in the tilting direction of the box body, A device for preventing a box from shaking, characterized in that the container has a bottom surface and peripheral walls formed of a waterproof sheet, and the fluid is contained in an area partitioned by the bottom surface and the peripheral walls.

2. 2. The device for preventing rocking of a box according to claim 1, wherein at least a part of the peripheral wall is formed of a bag filled with a gas or a liquid.

3. 3. The device for preventing rocking of a box according to claim 1, wherein at least a portion of the peripheral wall is structured by connecting a plurality of divided bodies that can be connected and disconnected to each other.

4. A device for preventing a box from shaking as described in claim 1 or 2, wherein when the container does not contain the fluid, at least the bottom surface is wrapped around one side wall portion that constitutes the peripheral wall.

5. 2. A device for preventing a box from swinging as claimed in claim 1, further comprising support means for maintaining said peripheral wall in an upright position.

6. 6. A device for preventing a box from swinging as claimed in claim 5, wherein said support means is disposed outside said peripheral wall.

7. 6. A device for preventing a box from swinging as claimed in claim 5, wherein said support means is disposed inside said peripheral wall.

8. 2. The device for preventing rocking of a box according to claim 1, wherein the container is cylindrical.

9. A method for installing a box in water, comprising: placing a container on a box having a hollow portion; storing a fluid in the container in a non-filled state; when the box floating on water sways and tilts, causing the fluid inside the container to flow downward in the tilt direction of the box, thereby suppressing the swaying of the box; and injecting water into the hollow portion to move the box downward and install it at a predetermined position in water, A method for installing a box underwater, characterized in that the container has a bottom and peripheral walls formed from a waterproof sheet, and the fluid is contained in an area partitioned by the bottom and peripheral walls.

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