JP2002166876A - Mooring mechanism of floating body structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mooring mechanism of a floating body structure, having a simple structure and requiring no power source while being capable of coping with big displacement of a water level by keeping tensile force acting on a mooring rope constant. SOLUTION: This mooring mechanism 20 to moor a floating island 10 is structured by hanging a mooring rope 21, one end of which is joined to an anchor 22 fixed on the sea bottom and the other end of which is joined to a weight 23, around a pulley 24 mounted to the lower surface of the floating island 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floating structure mooring facility for mooring a floating structure such as an artificial floating island, a floating walkway, an oil storage tank or a floating pier.

[0002]

2. Description of the Related Art Floating structures, such as artificial floating islands, floating walkways, petroleum offshore storage tanks, and floating piers, which are installed floating on dam lakes or the ocean, are fixed members such as anchors or sinkers provided on quays or water bottoms. Moored by mooring lines such as ropes or chains.

[0003] The mooring lines are arbitrarily set between one and a plurality of mooring lines, and these mooring lines restrict the movement of the floating structure and hold it at a fixed position.

[0004] By the way, the water level of the installation water surface may change due to the regulation of the amount of water in a dam lake or the tide at sea. In such an installation environment where the water level changes, a mechanism to stabilize the tension acting on the mooring line is provided.
The floating structure is installed so as to allow vertical movement following the displacement of the water level.

[0005] The tension-stabilizing mechanism is a simple mechanism using a so-called damper using a spring or a liquid, and extends the mooring line while constantly maintaining a constant tension applied to the mooring line by driving means using a torque clutch or the like. There are known a winding type and a type equipped with a control device for adjusting and controlling the tension based on the detected movement of the floating structure.

[0006]

However, a constant tension mechanism using a damper has a simple structure, but has a small allowable displacement, and a mechanism equipped with a torque clutch and a control device has a complicated structure and is expensive. In addition, there is a problem that it cannot be applied in an installation environment where it is difficult to secure a power source.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has a simple structure, does not require a power source, and can keep a constant tension acting on a mooring line and follow a large water level displacement. It is an object to provide a mooring mechanism for a structure.

[0008]

According to the present invention, there is provided a mooring mechanism for a floating structure, comprising: a mooring line member having a tension applying member such as a weight member or a floating member at one end; The floating structure and the fixed member are fixed to one of the structure and the fixing member provided on the bottom of the water and wrapped around a pulley provided on the other, and a constant tension is applied between the floating structure and the fixing member by the tension applying member. It is characterized in that the floating structure is connected so as to allow the floating structure to be attached to and detached from the fixing member in a state where the floating structure is provided.

[0009]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a perspective view showing an example of a structure of a mooring mechanism for a floating structure according to the present invention, and shows a state in which a floating island 10 as a floating structure is moored by a mooring mechanism 20. . The floating structure is not limited to a floating island, but may be any floating structure such as a floating walkway, an offshore oil storage tank, or a floating pier, as long as it is installed floating on the water surface.

The floating island 10 is made of metal, FRP, or the like, and is formed in a rectangular parallelepiped shape so as to float on the water surface at a predetermined draft, and a plant 11 such as a tree is planted on the upper surface thereof.

The mooring mechanism 20 has a mooring rope 21 as a mooring rope member having one end connected to an anchor 22 as a fixing member fixed to the sea floor and the other end connected to a weight 23 having a predetermined weight as a tension applying member. Are wound around a pulley 24 mounted on the lower surface of the floating island 10.

The weight 23 is formed into a rectangular parallelepiped with a predetermined weight by combining steel materials, and the mooring ropes 21 are connected to the upper surface in the vicinity of both ends in the longitudinal direction. It should be noted that a shape having a large number of holes or a complicated space may be configured so as to be a habitat for aquatic organisms.

In the mooring mechanism 20 constructed as described above, the weight of the weight 23 acts in the direction of sinking the floating island 10 via the mooring rope 21, and the floating island 10 has a buoyancy acting on the floating island 10 and the weight of the weight 23. Stabilizes in a balanced state. As a result, tension is generated in the mooring rope 21, and the floating island 10 can be moored immovably in the horizontal direction. On the other hand, the vertical displacement of the water surface due to the tide on the sea,
As shown in FIGS. 2A and 2B which are front views, the weight 23 can move up and down to follow the floating island 10 while keeping the tension of the mooring rope 21. In other words, it is possible to keep the tension acting on the mooring rope 21 constant and follow the displacement of the water level with a simple configuration and without a power source.

According to such a configuration, since the configuration is simple and no control device or power is required, it can be constructed at a low cost, can be easily maintained, does not require maintenance costs, and causes noise and air pollution. Nothing to do. In addition, since a stake or the like for installation is not used, installation and movement can be easily performed, and there is little possibility of impairing the landscape. Furthermore, if the weights are formed to be usable as fishing reefs or aquatic habitats, they can also contribute to environmental conservation.

Incidentally, the above configuration example is based on a pair of mooring ropes 21.
However, the number of mooring ropes and weights can be changed as appropriate, and may be set in consideration of weather conditions such as water flow and wind in the installation area.

That is, one mooring rope may be used, and one weight may be used. Alternatively, as shown in a plan view of FIG. 3, three, four or more mooring ropes may be used. FIG. 3A is a plan view of the above-described configuration example, in which there are two mooring ropes 21 and one weight 23, and FIG. 3B is a plan view showing three mooring ropes 21 and two weights.
3 is an example, and (C) is an example in which four mooring ropes 21 having two sets of the above-described configuration (A) and two weights 23 are provided.

In the example shown in the front view of FIG. 4, one weight 23 is provided for each of a pair (two) of mooring ropes 23.

Further, the mooring ropes 21 as in the above configuration example
In the configuration in which the one pulley 24 provided on the floating island 10 is wound around and the wiring is arranged, the weight 23 moves up and down a distance twice as long as the vertical movement amount of the floating island 10, so that the displacement amount of the water surface is large. In an installation place where there is no depth that allows the movement of the weight 23, the mooring rope 21 is hung around the floating island 10 and the plurality of pulleys 24, 25, 26 provided on the floating island 10 and the weight 23 as shown in a front view in FIG. By arranging the wires aside, the vertical movement amount of the weight 23 with respect to the vertical movement amount of the floating island 10 can be reduced.

Next, another configuration example of the present invention shown in a perspective view in FIG. 6 will be described. The parts having the same functions as those in the above configuration example are denoted by the same reference numerals, and description thereof will be omitted. This configuration uses a float 27 having a predetermined volume and a predetermined buoyancy acting as a tension applying member.

That is, in the illustrated mooring mechanism 20 ', the mooring rope 21 has one end connected to the floating island 10 and the other end connected to the float 27, and the anchor 2 fixed to the seabed.
2 and is routed around a pulley 28 provided in the vehicle 2.

In this configuration, the buoyancy acting on the float 27 acts in the direction of sinking the floating island 10, and the floating island 10 is installed in a state where the buoyancy acting on the floating island 10 and the buoyancy acting on the float 27 are balanced. Floating 27 on mooring rope 21
Buoyancy acts as tension. The mooring rope 21 on which the tension acts acts to regulate the horizontal movement of the floating island 10 and to follow the change in the water level while maintaining the tension.

This configuration has the same effect as the above-described configuration example, and the setting of the number of mooring ropes and the number of floating can be appropriately changed similarly to the above-described configuration example.

[0024]

As described above, according to the mooring mechanism for a floating structure according to the present invention, the mooring line member having a tension applying member such as a weight member or a floating member at one end is provided with a floating body floating on the water surface. A fixed tension was applied to the floating structure and the fixing member by the tension applying member by being coupled to one of the structure and the fixing member provided on the water bottom and being wrapped around a pulley provided on the other. In this state, the floating structure is connected so as to allow the floating structure to be separated from and attached to the fixed member, so that the floating structure can be moved to follow the displacement of the water level while restricting lateral movement. Can be moored.

According to this, since the configuration is simple and no control device or power is required, it can be constructed at a low cost, maintenance is easy, no maintenance cost is required, and no noise or air pollution is caused. In addition, since a pile or the like for installation is not used, installation and movement can be easily performed, and there is little risk of spoiling the scenery. The weight member can be used as a habitat for fishing reefs and aquatic organisms.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a configuration example of a mooring mechanism of a floating structure according to the present invention.

FIG. 2 is a front view illustrating the operation of the mooring mechanism.

FIG. 3 is a plan view showing an example of laying a mooring rope.

FIG. 4 is a front view showing a mooring mechanism having a different weight arrangement.

FIG. 5 is a front view showing a mooring mechanism that can reduce the movement of a weight.

FIG. 6 is a perspective view of a mooring mechanism as another configuration example of the present invention.

[Explanation of symbols]

 Reference Signs List 10 floating island (floating structure) 20 mooring mechanism 21 mooring rope (mooring line member) 22 anchor (fixing member) 23 weight (weight member) 24, 25, 26, 28 pulley 27 floating (floating member)

 ────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Akihito Oya 2-2-1 Otemachi, Chiyoda-ku, Tokyo Ishikawajima-Harima Heavy Industries, Ltd. F-term (reference) 2D018 BA00

Claims (3)

[Claims] 1. A mooring line member having a tension applying member at one end is coupled to one of a floating structure floating on the water surface and a fixing member provided on the water bottom and hung on a pulley provided on the other. Rotated, the floating structure and the fixing member are connected to each other to allow the floating structure to be separated from and attached to the fixing member in a state where a constant tension is applied by the tension applying member. A mooring mechanism for a floating structure. 2. The tension applying member is a weight member having a predetermined weight, the pulley is mounted on the floating structure, and the mooring line member has one end connected to the fixing member and the other end connected to the weight member. The mooring mechanism for a floating structure according to claim 1, wherein the mooring mechanism is attached to the pulley and laid around the pulley. 3. The tension applying member is a floating member that generates a predetermined buoyancy, the pulley is mounted on the fixed member, and the mooring line member has one end connected to the floating structure and the other end connected to the floating structure. The mooring mechanism for a floating structure according to claim 1, wherein the mooring mechanism is connected to a floating member and is routed around the pulley.