JPS5817077B2 - semi-submersible multihull - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a semi-submersible multihull having characteristics such as high-speed performance and wave resistance, and more specifically, when a semi-submersible multihull with unevenness on the ship's side approaches the berth, This relates to a semi-submersible multihull that has been improved to prevent the hull from colliding with quays and being damaged.

As described above, semi-submersible multihulls have characteristics such as high speed performance and wave resistance, and therefore have a very small waterline area.

In other words, a semi-submersible multihull, as shown in Figure 1a,
An upper hull 2a located above the water surface 1a and a plurality of lower hulls 3a submerged in water are connected by struts 4a having a very small water line area.

Since the power transmission shaft of the propulsion device installed in the lower hull 3a is placed inside the strut 4a, the main engine 7a must be placed in the upper hull 2a directly above the strut 4a, or when the lower hull 3a is berthed. In order to prevent the upper hull 2a from hitting the quay 5a before the upper hull 2a, the upper hull 2a and the lower /'%
The projecting portions of the rods 3a toward the outside of the ship are made almost the same.

Therefore, as can be seen from Fig. 1a, in a semi-submersible multihull, the ship side is formed in an uneven shape, so that the ship side of the upper 2a is not always on the fender 6a provided on the quay 5a. It does not necessarily mean that they will come into contact.

That is, since the upper hull 2a moves vertically with respect to the fender 6a of the quay 5a due to changes in the ebb and flow of the tide, changes in the hull's water intake, or the influence of waves, if the fender 6a shown in FIG. If the outer surfaces of the struts 4a face each other, there is a risk that the lower corners of the lower hull 3a and the upper hull 2a will collide with the quay 5a.

Therefore, it is possible to fix the fender 6b on the ship's side as shown in Figure 1, but if the ship floats above the height of the quay 5b, the fender 6b will come off the quay 5b. The lower hull 3b will collide with the quay 5b, and the fender 6b will be hit by waves during sailing, resulting in poor propulsion and wave resistance performance.

On the other hand, as shown in Fig. 1C, by placing the main engine in the lower hull 3C, the side surface of the upper hull 2C is flush with the side surface of the strut 4c, and the fender 6c is carried from the quay 5c to the lower hull 3C. It is also conceivable to make it protrude so as not to collide with 5c.

In this way, it is possible to prevent the hull from colliding with the quay 5c, and since semi-submerged multihulls are required to have high-speed performance, it is possible to improve performance by reducing the weight of the upper hull 2C. can.

However, in this case, it is necessary to install fixed equipment exclusively for semi-submerged multihulls on the quay 5c, and although there is no problem if the quay is dedicated to the main ship, general vessels can also berth on this quay 5c. In this case, the fender 6c becomes an obstacle to cargo handling operations, so the fender 6c must be removed or made movable.

Furthermore, in general quay walls, it is virtually impossible to provide the fender 6c on all the quay walls, and unless the fender is provided on the hull, the ship cannot berth.

As described above, in the past, no drastic measures had been taken to berth semi-submerged multihulls.

SUMMARY OF THE INVENTION Therefore, the present invention has been made with the object of enabling a semi-submerged multihull ship with uneven surfaces to be able to berth at a general quay.

To achieve this object, the present invention provides a semi-submersible multihull in which an upper hull with partially protruding sides and a plurality of lower hulls are connected by struts, and fenders are arranged on the ship side. The fender is disposed at a portion of the upper hull that is not a protruding part so as to be movable vertically or laterally with respect to the hull, and at least projects outward from the upper hull and the lower hull when berthed. It is characterized by a semi-submersible multihull that is located near the water surface.

Next, the present invention will be explained in detail with reference to FIGS. 2 to 5.

In FIG. 2, an upper hull 2 is located above the water surface 1, and below the water surface 1 below the upper hull 2, two lower hulls 3 are arranged in parallel.

These upper hulls 2 and each lower hull 3 are connected by struts 4, respectively.

The side surface of the upper hull 2 is formed so as to partially protrude from the outer surface of the strut 4, as shown in FIG.

A main engine 7 for driving the propulsion device is disposed within this protrusion.

By forming the upper hull 2 in this way, the weight of the hull can be reduced, and high-speed performance and wave resistance can be improved.

On the ship side of the semi-submersible multi-hull boat formed in this way, a fender 6 is arranged so as to be movable up and down, except for the above-mentioned protrusion.

The fender 6 is suspended by a wire rope 8 or the like, and the wire rope 8 is unwound or wound up by a winch 10 via a davit 9 fixed to the upper hull 2. .

A stopper 11 extends outward from the davit 9 to the side of the ship, and when the winch 10 winds up the wire rope 8, the fender 6 rises and its upper surface abuts against the stopper 11. By doing so, the fender 6 is fixed at the upper part of the ship side while the ship is sailing.

Further, the fender 6 is made to float on the water surface 1 by unwinding a wire rope 8 from a winch 10 when berthing, and as shown in FIG. 2, the diameter of the fender 6 is is formed to be larger than the distance A between the outer surface of the strut 4 and the outer surface of the lower hull 3, so that even if the outer surface of the fender 6 contacts the quay 5, the upper hull 2 and the lower hull 3 will not collide with the quay 5. has been made.

It is preferable that the fender 6 used in this way be inflated by fluid pressure such as compressed air during use, but the material etc. may be determined so that it always maintains a constant shape. good.

Preferably, the fender 6 has such buoyancy that it floats on the water surface. However, when it is suspended by a wire rope 8 or the like, it is preferable to position the fender 6 near the water surface 1. In particular, it may not be buoyant as mentioned above.

Now, when a semi-submersible multihull is berthed, winch 10
is operated to position the fender 6 near the water surface 1.

When the ship berths from this state, the fender 6 is caught between the outer surface of the strut 4 and the quay wall 5, so the lower hull 3
will not collide with quay 5.

After berthing in this way, the fender 6 is always located near the water surface 1, even if the vertical position of the ship changes due to tides, changes in the water on the ship, or the influence of waves. Therefore, the ship side will not come into contact with the quay 5.

In addition, in this embodiment, the weight of the hull can be reduced, so
It is extremely effective for this type of ship, which requires high-speed performance and wave resistance.

In addition, in FIG. 2, the fender 6 is provided on one ship side, but the fender 6 may be provided on both ship sides.

Furthermore, in this embodiment, as shown in FIG. 3 a = d, a main engine 7 is provided in the upper hull 2, and the main engine 7 and the propulsion device 12 of the lower hull 3 are connected via a shaft 14 passing through a bevel gear 13 and a strut 4. In order to connect the upper hull 2 with the main engine 7, the portion of the upper hull 2 where the main engine 7 is located is made to protrude outward.

In this case, the diameter of the fender 6 may be determined so that the most outwardly protruding portion of the fender 6 is positioned further outward than the outer surface of the protruding portion of the upper hull 2.

Further, as another embodiment, as shown in FIG. 4, the outer surface of the rear part of the upper hull 2 where the fender is located may be made flush with the outer surface of the strut 4, and further, as shown in FIG. As shown, the top of Upper Hull 2.

The width of the rear end may be made wider for mooring.

In the above-mentioned embodiment, the fender is moved in the vertical direction, but it may be stored in the strut during cruising and moved laterally so as to protrude outward from the strut when berthed.

As described above, according to the present invention, a semi-submersible multihull with uneven sides docks at a general quay, and even if the hull moves up or down due to external or internal factors, it remains close to the water surface. The action of the fender prevents the ship from colliding with the quay.

Therefore, there is no need to provide a dedicated quay for berthing the semi-submerged multihull, and there is no need to provide fixed fender equipment for each general quay.

Further, according to the present invention, as described above, the upper hull is provided with a protrusion and the main engine is accommodated in this, so that
The weight of the hull can be reduced, and since the fenders are placed in areas other than these protruding parts, the appearance is also favorable.Furthermore, since it has such a simple structure, it is also easy to manufacture the hull. It's advantageous.

[Brief explanation of the drawing]

Figures 1a, b, and c are explanatory diagrams as seen from the front of a ship showing an example of conventional fender equipment; Figure 2 is an explanatory diagram as seen from the front showing an embodiment of the present invention; Figure 3a is an explanatory diagram as seen from the front FIG. 3 is an explanatory diagram of a side view showing another embodiment, FIG. 3 is an explanatory diagram of a plan view thereof, and FIG. , 4th
FIG. 5 is an explanatory plan view showing still another embodiment. 1...Water surface, 2...Upper hull, 3
...Lower hull, 4...Strut,
5... quay, 6... fender.

Claims (1)

[Claims] 1. A semi-submersible multihull in which an upper hull with partially protruding side parts and a plurality of lower hulls are connected by struts, and a fender is arranged on the ship side, and the fender is
The upper hull is disposed in a non-protruding part so as to be movable vertically or laterally with respect to the hull, and at least protrudes outward from the upper hull and lower hull to the side of the ship when berthing, and is located near the water surface. A semi-submersible multihull featuring: