JP2000081094A - Mooring rope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mooring rope having gradually increasing reaction force against tension displacement. SOLUTION: This mooring rope 10 is composed if multiple rope units 12 connected each other. Each rope unit 12 includes a first connecting end 14 and a second flange 20 in the right end, a second connecting end 16 and a first flange 18 in the left end, an elastic body 22 arranged between the flanges 18 and 20, a rod 24 connected with the first flange 18, an end plate 28 facing to the first flange 18, and a cylinder 26 which surrounds the elastic body 22 and connects the end plate 28 with the second flange 20. To form a longer mooring rope, the first connecting end 14 of an adjacent rope unit 12 is inserted between the second connecting ends 16, 16, a connecting pin 30 is inserted into a thorough hole 16a and a hole 14a and screwed with a nut 32.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mooring line suitable for mooring an object floating or floating on the surface of water, underwater or in the air, and more particularly to a mooring line suitable for mooring a very large floating type offshore structure. About. More specifically, the present invention relates to a mooring line configured to gradually increase a reaction force against a tensile displacement.

[0002]

2. Description of the Related Art In recent years, it has been studied to install an ultra-large floating offshore structure on the sea and use it at an airport or the like. Such a floating offshore structure needs to be moored so as not to be swept away by tidal currents or wind. Conventionally, a steel chain or wire has been used as a rope body for mooring a floating offshore structure.

[0003]

A mooring line composed of a chain or a wire has a very low reaction force under tension until it reaches a maximum length (so-called taut state). The force increases rapidly. Therefore,
The floating offshore structure moves due to tidal currents and the like and receives a remarkably large tensile force from the mooring line at the moment when the mooring line reaches its maximum length, and an extremely large stress is instantaneously applied in an impact state. For this reason, not only mooring lines but also floating offshore structures and seabed mooring line anchors are required to have an impact-resistant structure that can withstand this impact, reducing the degree of freedom in structural design and reducing costs. It was one of the causes of the increase.

[0004] It is an object of the present invention to solve such a problem and to provide a mooring line in which the reaction force gradually increases with respect to a tensile displacement.

[0005]

A mooring line according to the present invention comprises a first connecting end disposed at one end in a tension loading direction, a second connecting end disposed at the other end, and a mooring line disposed at the one end. A second flange and a first flange disposed on the other end side;
An elastic body interposed between the flange and the second flange and pressed by the approach of the flanges; a first connecting member connecting the first flange and the first connecting end; a second flange; A plurality of cable units each including a second connection member connecting the two connection ends are connected in a cable shape by the connection ends.

When a tensile force is applied to the mooring line of the present invention, the elastic body is nipped by the first and second flanges and elastically compressively deforms, thereby generating a reaction force. Since this reaction force increases in accordance with the amount of deformation of the elastic body, the reaction force increases as the tensile displacement of the mooring cable increases.

In the present invention, the second flange is formed of an annular body having a central hole, and the elastic body is formed of a rubber cylindrical body having a through hole, and the second flange is coaxially provided. It is preferable that the first connecting member that is arranged and connects the first flange and the first connecting end has a rod shape and is inserted through the through hole and the central hole. In the present invention, only one elastic body may be arranged between the flanges, or a plurality of cylindrical elastic bodies may be arranged so as to be laminated in the cylinder axis direction.

[0008]

FIG. 1 is a side view of a main part of a mooring line according to an embodiment, and an upper half is a sectional view.

The mooring line 10 includes a large number of cable units 12
Are connected. Each cable unit 12 is disposed on a first connection end 14 disposed on the right end side in the drawing and a second connection end 16 disposed on the left end side, and on a first flange 18 disposed on the left end side and on the right end side. A second flange 20, an elastic body 22 arranged between the flanges 18, 20, a rod 24 connected to the first flange 18, and an end plate 28 arranged to face the first flange 18;
And a cylinder 26 surrounding the elastic body 22 and connecting the end plate 28 and the second flange 20 to each other.

In this embodiment, the elastic body 22 is made of a cylindrical rubber having a through hole 22a. The second flange 20 is an annular member having a central hole 20a.
The rod 24 is inserted into the through hole 22a and the center hole 20a, and the tip protrudes out of the cylinder 26. At the tip of the rod 24, a first ring-shaped member having a hole 14a is provided.
The connection end 14 is provided integrally. Second connecting end 16
Is formed of a pair of parallel plates whose base ends are welded to the end plate 28, and has an insertion hole 16a for the connecting pin 30.

Each cable unit 12 is connected to the second connecting end 16.
A first mooring line is formed by receiving the first connecting end 14 of the cable unit 12 adjacent between the two, inserting the connecting pin 30 into the insertion hole 16a and the hole 14a, and tightening the nut 32 into the connecting pin 30. .

When a pulling force is applied to the mooring line constructed as described above, the flanges 18 and 20 move in the approaching direction, and press the elastic body 22 according to the pulling force. The compression deformation of the elastic body 22 generates a reaction force corresponding to the tensile force.
Since the reaction force increases as the tensile force increases, the reaction force of the mooring line gradually increases in accordance with the increase in the tension. Therefore, the impact force applied when the mooring line is taut not only to the mooring line but also to the floating offshore structure, the mooring line anchor, and the like is significantly reduced.

In the above embodiment, one elastic body 22 is disposed in one cable unit 12, but in the present invention, one elastic body 22 is provided like the cable unit 12 'in FIG. A plurality of elastic bodies 22 may be arranged in the cable unit. In this way, the weight of the mooring line required to produce a unit displacement can be reduced. That is, the three elastic members 22
In FIG. 1, the connecting ends 16 and 18 are 3
In FIG. 2, three elastic bodies 22 of the same number are required.
However, only one connecting end 16 and 18 are required, and only one flange 18 and 20 and one end plate 28 are required, so that the weight of members other than the elastic body can be greatly reduced.

In the above embodiment, the cable unit 12 is connected by the connecting pins 30 and the nuts 32. However, it is apparent that various other joints can be employed.

Although three elastic bodies 22 are shown in the embodiment of FIG. 2, two or more elastic bodies 22 may be provided.

[0016]

As described above, according to the present invention, there is provided a mooring line in which the reaction force against tension gradually increases. According to the present invention, the required impact strength of not only mooring lines but also floating offshore structures, mooring line anchors, etc. can be reduced.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a mooring line according to an embodiment.

FIG. 2 is a configuration diagram of a mooring line according to another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Mooring cable 12, 12 'cable unit 14 1st connection end 16 2nd connection end 18 1st flange 20 2nd flange 22 Elastic body 24 Rod 26 Cylinder 28 End plate 30 Connection pin 32 Nut

Claims (4)

[Claims] 1. A first device disposed on one end side in a tension load direction.
A second connection end disposed on the connection end and the other end side, a second flange disposed on the one end side and a first flange disposed on the other end side, between the first flange and the second flange An elastic body interposed between the first and second flanges, and a first connecting member connecting the first flange and the first connecting end, and a second flange and the second connecting end. Mooring line formed by connecting a plurality of cable units each including a second connecting member in a cable shape by the connecting ends. 2. The second flange according to claim 1, wherein the second flange is formed of an annular body having a center hole, and the elastic body is formed of a rubber cylindrical body having a through hole, and is coaxial with the second flange. The first connecting member that connects the first flange and the first connecting end is rod-shaped, and is inserted through the through hole and the central hole. . 3. The mooring line according to claim 2, wherein the second connecting member has a tubular portion surrounding the outer periphery of the elastic body. 4. The mooring line according to claim 2, wherein a plurality of the elastic bodies are arranged along a cylinder axis direction.