JPS6017440Y2 - semi-submersible catamaran - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a semi-submersible catamaran.

A known semi-submersible catamaran has left and right lower hulls immersed in water, as shown in the side view in Figure 1 and the cross-sectional view in Figure 2.
1 and 01 are connected to the port and starboard sides of a cross deck 03 via left and right struts 02 and 02, respectively, and a prime mover 05 fixed on the cross deck 03 drives an upper horizontal drive shaft 07' and a lower horizontal drive shaft 07''. Axis 07 "'
The center line of the strut 02 and lower hull 01 is aligned with the vertical drive shaft 07.
” coincides with the center line.

However, in this type of semi-submersible catamaran, the lateral stability of the ship will be greater if the left and right struts 02, 02 are separated as much as possible, and if the lateral stability is the same,
As the distance between the left and right struts increases, the strut width can be made smaller, making it possible to reduce costs and propulsion resistance.

In addition, in conventional catamarans of this type, the vertical drive shaft 07'' passes on the center line of the strut 02, so the vertical drive shaft 07''
" is obstructing traffic within strut 02.

The present invention was proposed in view of these circumstances, and aims to create a semi-submersible catamaran that increases lateral stability, facilitates traffic within the strut, reduces propulsion resistance, and reduces costs. In a semi-submersible catamaran consisting of left and right lower hulls immersed in water connected to a cross deck via left and right struts, the center of the struts is positioned outward from the center of the lower hull. In both cases, the propeller vertical drive shaft passing through the strut is eccentric inward from the center of the strut.

An embodiment of the present invention will be described with reference to the drawings. FIG. 3 is a cross-sectional view thereof.

In the above diagram, 1 and 1 are the left and right lower hulls that are immersed in water, and 2 and 2 are the left and right struts whose lower ends connect to the left and right lower hulls 1 and 1, respectively. , the center lines of the struts 2, 2 are eccentric outwardly with respect to the center lines of the lower hulls 1, 1, respectively.

4 is a deck house built on the cross deck 3, 5 is a prime mover fixed on the cross deck 3, 6 is a propeller pivotally attached to the rear ends of the lower hulls 1 and 1, and an upper horizontal drive shaft 07' and a vertical drive shaft. 07″, lower horizontal drive shaft 0
The vertical drive shafts 7'', 7'' are on the center line of the lower hulls 1, 1, respectively, so they are eccentric inward with respect to the center lines of the struts 2, 2. .

Generally, in a catamaran, the spacing between the left and right lower hulls is determined by the width of the ship, but in the semi-submersible catamaran of this invention, the struts are eccentric to the outside of the lower hull, so the struts are placed on the center line of the lower hull. The lateral stability of the ship is increased compared to known twin-engine ships equipped with

Furthermore, if the required restoring force is constant, the length of the strut can be made smaller, resulting in a corresponding reduction in cost and propulsion resistance.

Furthermore, in the known twin-engine boat, the propeller shaft system is installed on the center line of the lower hull, and therefore the vertical drive shaft 07'' and the lower horizontal drive shaft 07'' are also installed on the center line of the strut, but in the twin-engine boat of the present invention, Since the strut is eccentric from the center of the lower hull, the vertical drive shaft in the strut is
By utilizing the wide side of the internal space of the strut created by the eccentricity of the strut for forward and backward and up and down traffic, traffic within the strut becomes convenient.

In short, according to the present invention, in a semi-submerged catamaran in which left and right lower hulls immersed in water are connected to a cross deck via left and right struts, the center of the strut is set outward from the center of the lower hull. By making the propeller vertical drive shaft that passes through the strut eccentric inward from the center of the strut, the stability is large, the propulsion resistance is high, the traffic inside the strut is
The present invention is industrially extremely useful because it provides a semi-submersible catamaran with reduced costs.

[Brief explanation of drawings]

Figure 1 is a side view of a known semi-submersible catamaran, and Figure 2 is a side view of a known semi-submersible catamaran.
FIG. 3 is a cross-sectional view showing one embodiment of the present invention. 1.1...Lower hull, 2,2...Strut, 3...Cross deck, 4...
・Detsuki House, 5... Prime mover, 6, 6...
...Propeller 7/, 7/... Upper horizontal drive shaft, 7", 7"... Vertical drive shaft, 7"', 7"
′・・・Lower horizontal drive shaft.

Claims (1)

[Scope of utility model registration request] In a semi-submersible catamaran in which left and right lower hulls immersed in water are connected to a cross deck via left and right struts, if the center of the strut is eccentrically outward from the center of the lower hull, A semi-submersible catamaran, characterized in that a propeller vertical drive shaft passing through the strut is eccentric inward from the center of the strut.