JPS60109406A - Mooring device - Google Patents

Abstract

PURPOSE:To exactly and safely moor floating object by a method in which a ginbal to connect the tip of a connection lever to a turntable is provided, and a movable bearing is connected to an elastic damper to expand or shrink along a guide bar. CONSTITUTION:A mooring tower 1 is pivotally attached through an universal joint 4 to the mooring tower foundation 3 strongly fixed to the ground of seabed by plural anchor piles 2. The vertical motion of the mooring float 14 is absorbed by the rotation mechanisms of a hinge 13 and a ginbal 6, the bilateral motion is absorbed by the rotation mechanism of a turntable 5, and the rolling is absorbed by the rotation mechanism of the ginbal 6. The back and forth movement is also absorbed by the inclination recovery moment of the mooring tower 1 and the spring characteristics of the elastic damper 10. Mooring forces necessary for the movements of the mooring float receiving waves, tidal current forces and wind pressures can be relieved.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mooring device suitable for mooring a floating body such as a ship on a sea that has severe conditions such as shallow water depth and high waves.

11 = Conventional mooring devices such as those shown in Figures 1 and 2 are used. In the device shown in Figure 1 (single anchor leg mooring), the lower end is connected to the seabed. A mooring floating body C such as a ship body is moored to the mooring tower body a having a buoyant force via a connecting rod.

In addition, a device like the one shown in Figure 2 (single anchor,
In the leg storage system, a mooring floating body C is moored to a mooring tower body a whose lower end is connected to the seabed via a connecting rod b equipped with a buoyancy tank d. The mooring devices shown in Figures 1 and 2 have spring characteristics due to the restoring moment caused by the buoyancy of the mooring tower body a or the buoyancy tank d, and are designed to provide spring characteristics to the mooring device by using the restoring moment caused by the buoyancy of the mooring tower body a or the buoyancy tank d. Its function is demonstrated in sufficiently deep waters. Therefore, when a large mooring force is required due to high waves in shallow waters where the buoyancy lever cannot be adjusted sufficiently, the mooring tower body a or buoyancy tank d should be made with a diameter that is extremely large. must,
Considering the clearance relationship between the seabed and the sea surface, there is a problem that it is not practical.

The present invention attempts to solve the second problem, and is aimed at solving the second problem.
1-, it is an object of the present invention to provide a mooring device that can reliably and safely moor a floating body such as a ship without increasing the size of the device.

For this reason, the mooring device of the present invention includes a mooring tower body whose lower end is pivotally attached to the seabed, a turntable provided at two ends of the mooring tower body, and a base end lying on the mooring floating body. It is equipped with a connecting pin which is pivotally connected via a horizontal hinge in the direction, and a gimbal that connects the tip of the connecting gun to the turntable described in 1. The vertical axis of rotation of the cymbal is connected to the turntable described in 1. Both ends of the horizontal rotating shaft of the non-pallet are supported by movable bearings along a pair of mutually parallel guide rods at the tip of the connecting rod, and the movable bearings It is characterized in that it is connected to an elastic gripper that can expand and contract along the guide rod.

3- Hereinafter, a mooring device as an embodiment of the present invention will be explained with reference to the drawings. Fig. 3 is a side view thereof, Fig. 4 is a plan view thereof, and Fig. 5 is an enlarged view of the main part of Fig. 4. A plan view showing,
FIG. 6 is a plan view showing the compressed state of the elastic pumper in correspondence with FIG.

As shown in Figures 3 to 5, a mooring tower body 1 that generates buoyancy under the water surface is attached to a mooring tower body foundation 3 that is firmly fixed to the seabed ground by a plurality of anchor piles 2. −
universal joint (universal joint)
Its lower end is pivotally connected via 4.

This universal joint 4 is constructed of the usual Gufurhinno type,
The mooring tower body 1 can be tilted at any angle around its vertical axis, but stands upright perpendicular to the seabed surface in an unloaded state. And, at the top of the mooring tower body 1,
A turntable 5 is provided which is rotatable around its vertical axis.

On the other hand, the base end of the connecting pin 8 has a horizontal axis in the lateral direction.
= It is pivotally attached to the mooring floating body 14 via the hinge 13, and the connecting rod 8 can be raised and lowered on the mooring floating body 14 using the hinge 13 as a fulcrum.

Further, the tip of the connecting rod 8 is connected to the turntable 5 by a cymbal 6 consisting of a vertical rotation shaft 6a and a horizontal rotation shaft 6b.

The vertical rotation shaft 6a of this non-pallet 6 is supported by a bearing 7 protruding from the turntable 5'';
The non-pallet 6 is rotatable around this vertical rotation axis 6a.

Furthermore, both ends of the horizontal rotation axis 61 of the cymbal 6 are
The non-pallet 6 is supported by a pair of movable bearings 9 attached to the tip of the connecting pin 8, and is rotatable around a horizontal rotation axis 61''.

Therefore, the connecting pin 8 can rise and fall using the cymbal 6 as a fulcrum, and can also rotate around its central axis.

Furthermore, the pair of movable bearings 9 have slide holes, and by fitting a pair of mutually parallel guide rods 8a formed at the tip of the connecting pin 8 into the slide holes, the guide rods 8a are inserted into the slide holes. It is attached to the tip of the connecting pin 8 so as to be slid along the rod 8a.

This movable bearing 9 is connected to the rear end of an elastic damper 10 that can expand and contract along the guide rod 8a, and the tip of the elastic damper 10 is connected to a stopper 11 fixed to the tip of the guide rod 8a. is compressed by being sandwiched between the movable bearing 9 and the stopper 11 as the connecting rod 8 moves relative to the mooring tower body 1.

Further, behind the movable bearing 9, an elastic stopper 12 capable of absorbing shock is fixed to the guide rod 8a.

In order to prevent excessive compression of the elastic pumper 10, a bar (not shown) is fixed to the guide rod 8a in front of the movable bearing 9.

Since the mooring device of the present invention is constructed as described above, various components of the motion generated in the moored floating body 14 that is subjected to waves, tidal current force, wind pressure, etc. are transferred to the mooring tower body 1 via the connection pipe 8. It is transmitted and absorbed by the rotation mechanism and the tilting and restoring of the mooring tower body 1 during the transmission.

That is, among the various motion components of the moored floating body 14, the two vertical swings and vertical swings are mainly absorbed by the rotation mechanism of the hinge 13 and the rotation mechanism of the horizontal rotation axis 6b of the cymbal 6.

The swaying from side to side and the bow are mainly due to turntable 5.
Due to the rotation mechanism, the horizontal vibration is mainly absorbed by the rotation of the vertical rotation axis 6a of the cymbal 6.

In addition, the back-and-forth oscillation is caused by the mooring tower body 1 with the universal joint 4 as the fulcrum.
and the guide frame 8 at the tip of the connecting pin 8.
a1: Absorbed by the spring characteristics of compression and restoration of the provided elastic damper 10.

Here, a mechanism in which the back-and-forth swing of the moored floating body 14 is absorbed by compression and restoration of the elastic damper 10 will be explained with reference to FIG. 5.6.

First, when the moored floating body 14 tries to move away from the mooring tower body 1 from the neutral state shown in FIG. The elastic damper 10 sandwiched between the stopper 11 is compressed and becomes the state shown in FIG. At this time, excessive compression of the elastic damper 10 is prevented by a stopper (not shown) provided on the guide rod 8a.

Next, since the elastic damper 10 tries to recover from the compressed state by its elasticity, the guide rod 8a slides in the slide hole of the movable bearing 9 in the opposite direction to that described above, and returns to the state shown in FIG. Return to neutral state. At this time, the elastic damper 10 is not extended beyond the neutral state by the guide rod 8a.
This is prevented by an elastic stopper 12 fixed to the .

In this way, the motion of the moored floating body 14 is absorbed by the compression/restoration spring characteristics of the elastic damper 10.

In addition, an elastic damper 10 that acts on both expansion and compression is used, and the elastic stopper 12 is placed rearward (to the right in FIGS. 3 to 6) from the position of the movable bearing 9 in the neutral state. 8- By providing the elastic damper 10 and the stomper 11 symmetrically on the guide rod 8a not only in front of the movable bearing 9 but also in the front and back, the mooring floating body 14 not only moves away from the mooring tower body 1 but also The spring characteristics of the elastic damper can also absorb the approaching movement.

Next, when comparing the mooring characteristic curves regarding the back and forth swing of the moored floating body between the conventional mooring device (broken line) and the mooring device of the present invention (solid line) using FIG. 7, it is clear that the mooring device of the present invention When used, the mooring force generated for a certain amount of movement of the moored floating body becomes smaller compared to the conventional one. This mooring force difference (FF') indicates the force absorbed by the elastic damper.

As described in detail below, the mooring device of the present invention includes a mooring tower body whose lower end is pivotally connected to the seabed, and a turntable provided at the two ends of the mooring tower body. With,
It is equipped with a connecting rod whose base end is pivotally connected to the moored floating body via a horizontal horizontal hinge axis, and a cymbal that connects the tip of the connecting rod to the turntable. The shaft is supported by a bearing on the turntable shown in -1, and both ends of the horizontal rotation shaft of the gimbal shown in -1 are movable bearings that run along a pair of mutually parallel guide rods at the tip of the connecting rod. With a simple configuration in which the movable bearings are connected to elastic dampers that can expand and contract along the guide frame, it is necessary for the movement of the moored floating body that is subjected to waves, tidal currents, wind pressure, etc. Since the mooring force is reduced, the mooring tower body and buoyancy tank can be made smaller, which has the advantage of being lighter in use even in seas with harsh conditions such as shallow water depth and high waves.

In addition, the force acting on the foundation structure of the mooring tower body is reduced,
Since the basic structure can be downsized, the device of the present invention also has the advantage of being usable at sea on soft submarine ground.

[Brief explanation of the drawing]

Figures 1 and 2 are side views showing examples of conventional mooring devices;
3 to 7 show a mooring device as an embodiment of the present invention, FIG. 3 is a side view thereof, FIG. 4 is a plan view thereof,
Figure 5 is an enlarged plan view of the main part of Figure 4, Figure 10-6 is a plan view showing the compressed state of the elastic damper corresponding to Figure 5, and Figure 7 is a plan view of the mooring of this device. 3 is a graph showing a comparison of characteristic curves with those of a conventional device. 1. Mooring tower body, 2. Anchor pile, 3. Mooring tower body foundation, 4. Universal joint, 5. Turn tip full, 6.
・Cymbal, 6a...Vertical rotation axis, 6b...Horizontal rotation axis, 7...Bearing, 8...Connection pin, 8a...Guide rod,
9...Movable bearing, 10...Elastic damper, 11...Stopper, 12...Elasticity) Collar 113...Hinge,
14...Moored floating body. Sub-Agent Patent Attorney Yoshihiko Iinuma = 11- 1st diagram 2nd diagram 5th diagram 6th diagram 7th grade

Claims (1)

[Claims] It is equipped with a mooring tower body whose lower end is pivotally attached to the seabed, and a turntable installed at the upper end of the mooring tower body.
It has a connecting rod whose base end is pivotally connected to the moored floating body via a horizontal horizontal hinge axis, and a gimbal that connects the tip of the connecting rod to the turntable, and the vertical rotation axis of the gimbal is connected to the turntable. The turntable is supported by two bearings,
Both ends of the horizontal axis of rotation of the cymbal are supported by movable bearings along a pair of mutually parallel guide rods at the tip of the connecting rod, and the movable bearings are supported along the guide rods. A mooring device, characterized in that the mooring device is connected to an elastic gumper that can be expanded and contracted.