JPS60109407A - Mooring device - Google Patents

Abstract

PURPOSE:To exactly and safely moor floating object by a method in which a connecting lever pivotally attached to the upside of a turntable is provided to the front end of a movable frame, and an elastic damper is provided between a fitting metal and the movable frame. CONSTITUTION:A mooring tower 1 is pivotally attached through a universal joint 4 to the mooring tower foundation 3 strongly fixed to the ground of seabed. The vertical movement of the mooring float is absorbed by the rotation mechanisms of a hinge 11 and an upper universal joint 7, the bilateral movement is absorbed by the rotation mechanism of the turntable 5, and the rolling is absorbed by the rotation mechanism of the universal joint 7. The back and forth pitching is also absorbed by the elastic damper and controlled by elastic stoppers 13 and 14. Mooring forces necessary for the movements of the mooring float receiving waves, tidal current forces, wind pressures, etc., 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 in a sea with severe conditions such as shallow water depth and high waves.

As a conventional mooring device, a 1-type mooring device as shown in Fig. 1.2 is used, and a device (as shown in ttSi figure) is used.
In single anchor leg mooring (single anchor leg mooring), a mooring floating body C such as a ship body is moored to a buoyant mooring tower body a whose lower end is connected to the seabed via a connecting rod 1].

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 pipe 1 having a buoyancy tank d. The mooring devices shown in Figure 1.2 are designed to have spring characteristics due to the restoring moment due to the buoyancy of the mooring tower body a or the buoyancy tank d, and the mooring devices are designed to provide spring characteristics to the mooring device by the restoring moment due to the buoyancy of the mooring tower body a or the buoyancy tank d. Its function is demonstrated when it is placed in a sufficiently deep ocean.

Therefore, if 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 must have a very large diameter. However, considering the clearance relationship between the seabed and the sea surface, -2 = impractical.

The present invention aims to solve these problems, and is aimed at solving the problems described above.
The second object is 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.

Therefore, 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 the negative end of the mooring tower body, and a universal joint on the turntable. The base end of the connecting rod is connected to the front end of the movable frame, which is supported by the mooring floating body ``2'' so that it can move forward and backward, through a horizontal hinge shaft. The present invention is characterized in that an elastic clamper for regulating the movement of the movable frame is mounted between the movable frame and the mounting hardware on the mooring floating body.

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 a view taken along arrow V-■ in FIG. 63- The figures are a sectional view taken along the line Vl-Vl in Fig. 1, Fig. 7 is a sectional view showing the compressed state of the elastic pumper corresponding to Fig. 6, and Fig. 8 shows the mooring characteristic curve of this device. It is a graph shown in comparison with that of a conventional device.

As shown in Figure 3.4, 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. ”
Its lower end is pivotally connected via a lower universal joint 4 attached to the second part.

This lower universal joint 4 is constructed of a normal double hinge type, and the mooring tower body 1 can be tilted at any angle around its vertical axis, but in an unloaded state it is perpendicular to the seabed surface. stand upright.

A turntable 5 rotatable around its vertical axis is provided at the top of the mooring tower body 1.

On the other hand, the tip of the connecting pin 6 is pivotally connected to the turntable 5 via a two-part universal joint 7, which is a normal double hinge type or cymbal type. "Two-part universal joint 7"
- It can be used as a fulcrum to raise and lower and rotate around its central axis.

The base end of the connecting rod 6 is connected to a hinge 1 having a horizontal axis in the lateral direction at the front end of a movable frame 10 that is supported by a frame guide part 9 on the mooring floating body 8 and can move only in the front and back direction.
1, and the connecting pin 6 can be raised and lowered with respect to the movable frame 1 ( ) using the hinge 11 as a fulcrum.

Furthermore, a plurality of elastic grippers 12 (two in this embodiment) for regulating the movement of the movable frame 10 are installed between the front edge of the movable frame 10 and the mounting hardware 15 fixed to the mooring floating body 8''2. As the movable frame 10 moves with respect to the moored floating body 8, the elastic gun bar 12 is attached to the mounting hardware 15.
and the movable frame 10 to be compressed.

As shown in FIGS. 3 to 6, in order to prevent excessive compression of the elastic gripper 12, a stopper 14 is attached to the movable frame 10.
At the same time, an elastic stomper 13 is fixed to the movable frame 10 in order to restrict the expansion of the elastic stomper 12 and absorb the shock when the elastic stomper 12 recovers from compression.

The frame guide section 9 has a slide hole formed therein and is equipped with a plurality of rollers 16, and the movable frame 10 slides only in the front-back direction within the slide hole of the frame guide section 9 while being supported by the rollers 16. It is now possible to do so.

Since the mooring device of the present invention is configured as described above,
Various components of the motion generated in the moored floating body 8 that is subjected to waves, tidal current force, wind pressure, etc. are transmitted to the mooring tower body 1 through the coupling pipe 6, and are transmitted to the rotating mechanism and the mooring tower body 1 in the middle of the transmission. Absorbed by tilting and restoring.

That is, among the various motion components of the moored floating body 8, the two-down swing and pitching are mainly absorbed by the rotation mechanism of the hinge 11 and the rotation mechanism of the horizontal rotation axis of the two-part universal joint 7.

The lateral sway and bow sway are mainly caused by the turntable 5.
Due to the rotation mechanism of the upper universal joint 7, the horizontal vibration is mainly caused by
They are each absorbed by the rotation mechanism of the vertical axis of rotation.

In addition, the back-and-forth swing is caused by the inclination restoring moment of the mooring tower body 1 with the lower universal joint 4 as the fulcrum, and the compression and restoring spring characteristics of the movable frame 10, the mounting hardware 15, and the elastic damper 12 mounted open. Absorbed.

Here, a mechanism in which the back-and-forth swing of the moored floating body 8 is absorbed by the compression and restoration of the elastic damper 12 will be explained with reference to FIGS. 5 to 7.

First, when the moored floating body 8 tries to move away from the mooring tower body 1 from the neutral state shown in FIGS. 5 and 6 (that is, the movable frame 10 tries to move to the left in the figure), the frame guide part 9 The movable frame 10 slides within the slide hole, and the elastic damper 12 sandwiched between the movable frame 10 and the mounting hardware 15 is compressed, resulting in a state as shown in FIG.

In addition, excessive compression of the elastic damper 12 is prevented by the stopper 14 fixed to the movable frame 10 coming into contact with the frame guide portion 9.

Next, since the elastic damper 12 attempts to restore itself from the compressed state due to its elasticity, the movable frame 10 slides in the slide hole of the frame guide portion 9 in the opposite direction to the above, and the fifth Return to the neutral state as shown in Figure 6. At this time, the elastic damper 12 is prevented from elongating beyond its neutral state by the elastic damper 13 fixed to the movable frame 10 coming into contact with the frame guide portion 9.
be made into

In this way, the motion of the moored floating body 8 is absorbed by the spring characteristics of compression and restoration of the elastic damper 12.

It should be noted that an elastic damper 12 that acts on both expansion and compression may be used so that the frame guide portion 9 in the neutral state is equally spaced from the elastic stompers 13 and 14, or an elastic damper may be used. 12. By providing the mounting hardware 15 and the stomper mechanism symmetrically not only in front of the movable frame 10 (leftward in FIGS. 3 to 7) but also in the front and back, it is possible to prevent not only the movement of the mooring floating body 8 away from the mooring tower body 1 but also the movement of the mooring floating body 8 away from the mooring tower body 1. The spring characteristics of the elastic damper absorb the movement of the approaching object.

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. 8, 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 (F-F') 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. ,
A connecting rod is provided on the turntable, the tip of which is pivotally connected via a universal joint, and the base end of the connecting rod is attached to the front end of a movable frame that is supported on the moored floating body so as to be movable back and forth. A simple structure in which an elastic damper, which is pivotally connected via a horizontal hinge and restricts the movement of the movable frame, is mounted between the mounting hardware on the mooring floating body and the movable frame, The mooring force required for the movement of a moored floating body that is subjected to waves, tidal current force, wind pressure, etc. is reduced, so the mooring tower body and buoyancy tank can be downsized and It has the advantage of being able to be used even in harsh conditions such as the sea.

In addition, the force acting on the foundation structure of the mooring tower body is reduced,
Since the basic structure can be miniaturized, the device of the present invention has the advantage that it can be used even 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 8 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, and FIG. 5 is a view taken along arrow V-V in FIG. 4. Figure, $6 figure is Vl of figure 4
-Vl arrow sectional view, Figure 7 is a sectional view showing the compressed state of the elastic damper corresponding to Figure 6, and Figure 8 is a comparison of the mooring characteristic curve of this device with that of a conventional device. It is a graph. 1...Mooring tower body, 2...Anchor pile, 3...Mooring tower body foundation, 4...Lower universal joint, 5...Turnty 10-full, 6...Ya connection pipe, 7...Upper universal joint, 8・・Mooring floating body, 9・・Frame guide part, 1o・・7 movable frames, 11・・Elastic damper, 13・Variable elastic stopper, 14. - Stopper, 15...Mounting hardware, 16...Roller. Sub-Agent Patent Attorney Yoshihiko Iinuma 11- Figure 1 Figure 2 Figure 5 Figure 6 Figure 7 Figure 8! ＋Strength amount

Claims (1)

[Claims] It has a mooring tower body whose lower end is pivotally attached to the seabed, and a turntable installed at the two ends of the mooring tower body, and the tip is pivotally attached to the turntable via a universal joint. A connecting rod is provided, and the base end of the connecting rod is pivotally connected to the front end of a movable 7 frame supported mooring floating body 2 so that it can move forward and backward via a horizontal hinge axis in the lateral direction. A mooring device characterized in that an elastic clamper for controlling the movement of the movable frame is mounted between the mooring floating body (2) mounting hardware and (1) the movable frame.