JPS5943604B2 - Device to prevent floating structures from moving onto land due to tsunamis and storm surges - Google Patents

Description

[Detailed Description of the Invention] This invention is a prevention device for preventing floating structures such as ships anchored in a port from moving onto land when a high tide occurs due to a tsunami or typhoon. It is related to.

Traditionally, when a high tide occurs due to a tsunami or typhoon, floating structures such as ships moored at a port would cut their mooring lines and move onto land, and after the tide receded, they would remain on land. A situation occurs.

If the floating structure remaining on land is a large structure such as a ship, it will be impossible to return it to the sea, so it will have to be dismantled and scrapped, resulting in great damage.

Furthermore, if such large structures remain on roads or railways, major problems will occur in terms of transportation.

The present invention provides a device for preventing a floating structure on the sea from moving to land due to the above-mentioned high tide caused by a tsunami or a typhoon, and the device is designed to prevent floating structures from moving onto land in front of a quay.
A protective body is placed facing the sea side, and one end of the protective body on the land side is pivotally connected to a quay, and when an abnormal water level occurs, the pivoting is performed by the buoyancy of the protective body or by the pulling force of a floating structure The present invention is characterized in that the sea-side end of the protective body is pivoted upward about the point.

This invention will be described below with reference to embodiments and drawings.

1 and 2 are side views showing a first embodiment of the invention.

3 and 4 are side views showing a second embodiment of the invention.

5 and 6 are side views showing a third embodiment of the present invention.

7 and 8 are a side view and a plan view showing a fourth embodiment of the present invention.

The invention will first be explained according to a first embodiment shown in FIGS. 1 and 2.

In the drawings, reference numeral 1 denotes a quay, and a stepped portion 1' is provided on the front sea side of the quay, and a protective body 2 having a fender 2' at the tip is arranged on the stepped portion 1'.

The protector 2 may have a rod shape or a flat frame shape.

The land-side base of the protector 2 is pivotally connected to the quay 1 via a shaft 3.

Furthermore, a stopper 4 made of a chain or link is provided between the protector 2 and the stepped portion 1'.

Further, a mooring cable 5 is fixed to the tip of the protector 2, and a floating structure 6 on the sea such as a ship is moored to the mooring cable 5.

Note that A represents the normal water level.

In the first embodiment of the present invention having such a configuration, as shown in FIG. 2, when an abnormal water level B is reached due to a tsunami or high tide, the floating structure 6 on the sea floats.

Then, the mooring cable 5 causes the protector 2 to rotate upward about the shaft 3, and is stopped by the stopper 4, as shown in the figure.

Therefore, in the illustrated state, even if the marine floating structure 6 tries to move toward the land side, the protector 2 prevents the movement.

Note that the above example is a case where the protector 2 rotates upward via the mooring rope due to the levitation of the floating structure 6 on the sea, but the protector 2
If the structure itself has buoyancy, it can naturally form the inclined state shown in FIG. 2 as the tide level changes.

Next, in a second embodiment of the present invention shown in FIGS. 3 and 4, a pedestal 7 having a guide groove 7' is provided in front of the quay 1, and the inside of the guide groove T' of the pedestal 7 is covered with a protective body. The shaft 3 of 2 is slidable, and the floating structure 6 on the sea is moved laterally to buffer sudden forces.

Furthermore, a stopper 4' is provided on the back side of the protector 2, and as shown in FIG. It is designed so that it can be kept in a tilted position.

Since the operation is the same as that of the first embodiment described above, a description thereof will be omitted.

Furthermore, in a third embodiment of the present invention shown in FIGS. 5 and 6, a triangular prism-shaped protector 2 having a fender 2' at the tip is mounted on a quay 1 by its corner shaft 3. It is rotatably mounted, and a stopper 4'' is provided at one end of the protector 2.

The operation is the same as in the first and second embodiments, but in this embodiment, the movement force of the floating structure 6 toward the land side is transferred onto the quay 1' by the shaft 3 and the stopper 4''. This has the effect that it can be appropriately distributed and that no unreasonable load is applied to the protector 2.

Further, in a fourth embodiment of the present invention shown in FIGS. 1 and 8, a step 1' is provided on the quay 1, a frame-shaped protector 2 is arranged, and the proximal end of the protector 2 is connected to the quay. It is the same as the first embodiment described above in that it is rotatably mounted on the shaft 3 on the body 1, but in this embodiment, the length of the protector 2 is increased and the stopper 4 is omitted. It has characteristics.

The water level changes from the normal water level A to the abnormal water level B, and the protective body 2 along with the floating structure 6 becomes tilted (indicated by the dashed line in the figure), causing the floating structure 6 to move toward the land side. The same applies to the fact that it is blocked.

According to this invention, when a tsunami caused by an earthquake or a storm surge caused by a typhoon occurs, a protective body is quickly formed against changes in the tide level without requiring special power, so floating structures such as ships etc. This has the extremely useful effect of preventing abnormal situations in which objects move onto land and eventually remain on land.

[Brief explanation of drawings]

1 and 2 are side views showing a first embodiment of the invention. 3 and 4 are side views showing a second embodiment of the invention. FIGS. 5 and 6 are side views showing a third embodiment of the invention. 7 and 8 are a side view and a plan view showing a fourth embodiment of the present invention. In the drawing, 1...quay, 1.'...step, 2.
...protector, 2'...fender 13...shaft 4.
4', 4tt...Stopper, 5...Mooring cable, 6...
- Floating structure on the sea, 1... Frame, 7'... Guide groove, A... Water level during normal times, B... Water level during abnormal times.

Claims (1)

[Claims] 1. A protective body is placed in front of the quay, facing toward the sea, and one end of the protective body on the land side is pivotally attached to the quay, so that when abnormal water levels occur, the buoyancy of the protective body or the movement of floating structures on the sea 1. A device for preventing movement of a floating structure on land due to a tsunami or storm surge, characterized in that the other sea-side end of the protective body rotates upward about the pivot point due to force.