JPS593029Y2 - Marine underwater stabilizing fin - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an underwater stable fin for ships suitable for use in submersible ships, semi-submersible ships, etc.

Conventional underwater stabilizing fins for ships include those shown in Figures 1 to 3, and this stabilizing fin a projects into the water from the hull, and its cross-sectional shape is as shown in Figure 2.
It has a streamlined wing shape.

By the way, this type of underwater stable fin a is required to maintain the wing shape and have a structure that can withstand external forces from waves and fluids.
In addition to using thin metal plates, the interior is lined with vertical beams d and horizontal beams e.
It has a shell structure reinforced with bone structure.

In order to prevent the shell structure from receiving water pressure during diving, pressure equalizing holes f are provided at various locations to allow water and air to freely flow in and out.

However, such conventional underwater stable fins for ships have the following problems.

(1) The structure is complicated and requires a large amount of man-hours to process and manufacture.

(2) Since metal is used as the material, internal corrosion and electrolytic corrosion on the hull surface become a problem.

(3) Internal cavity space is not used effectively.

(4) Vibration of the epidermis C tends to generate noise.

This invention attempts to solve these problems.
The purpose of the present invention is to provide a stable underwater fin for ships that has a simple structure, high water pressure resistance, and allows the space inside the fin to be effectively used for buoyancy.

For this reason, the underwater stable marine fin of the present invention is characterized by being formed into an airfoil shape by laminating a synthetic resin surface on the outer surface of a solid buoyancy member made of a large number of hollow microscopic glass spheres hardened with resin. .

Below, the underwater stable fin for ships as an embodiment of the present invention will be explained with reference to the drawings. Fig. 4 is a partially cutaway plan view of the fin, and Fig. 5 is a cross-sectional view taken along the line v-■ in Fig. 4. 6 is a sectional view taken along the line VI-VI in FIG. 4, and the underwater stabilizing fin 1 is provided so as to protrude outward from the hull 2 of a submersible or semi-submersible boat.

By the way, this underwater stable fin 1 has a structure in which a synthetic resin surface 4 is laminated on the outer surface of a buoyancy member 3 which is formed into a wing shape.

As this buoyant member 3, a member having a low specific gravity, such as Syntateituri (trade name), which is made of a large number of hollow microscopic glass spheres filled with resin, is used.

When the underwater stable fin 1 is constructed using syntactics in this way, its specific gravity can be reduced to about 0.5.

Further, as the synthetic resin layer 4, for example, a layer of reinforced plastic (FRP) having a core of glass wool is used.

With the above-described configuration, when the underwater stable fin 1 is attached to the hull 2, the interior of the underwater stable fin 1 is filled with the buoyancy member 3, so that the boat can sail while ensuring sufficient buoyancy.

In addition, the shape of the underwater stable fin 1 is reliably maintained by laminating a synthetic resin layer 4 on the buoyancy member 3, and furthermore, external forces due to waves and fluids applied to the underwater stability fin 1 are also prevented by the buoyancy member 3 and the synthetic resin layer. 4 provides sufficient support, so high reliability can be obtained in terms of strength.

Although the shape of the buoyancy member 3 may be molded into a complete wing shape from the beginning, it is not necessary to do so, and the desired wing shape as a whole can be formed after laminating the synthetic resin layer 4. I wish I could.

As detailed above, the underwater stable fin for ships of the present invention has the following effects and advantages.

(1) Underwater stability By using the inside of the fin as a buoyancy member space, a large space can be secured for installing ant control equipment inside the hull.

(2) Since the structure can be simplified, manufacturing costs can be significantly reduced, and the manufacturing period can also be shortened.

(3) Since it has a solid structure, corrosion and defects inside the fin will not occur.

(4) Since the buoyancy member can be easily cut, it is easy to mold and a highly accurate shape can be obtained.

(5) Even if cracks occur in the synthetic resin layer as the outer skin in the event of a damage accident, the large number of hollow micro glass spheres with high water pressure resistance that make up the buoyancy member each provide buoyancy.
The buoyancy of the buoyant member as the main body of the underwater fin is not lost.

(6) Since each hollow microscopic glass sphere is mutually hardened with resin, sufficiently high compressive strength can be obtained.

(7) The axial force member is configured by itself as a strength member of the underwater stable fin and does not require any other strength member.

[Brief explanation of the drawing]

Figures 1 to 3 show conventional underwater stable fins for ships, with Figure 1 being a partially cutaway plan view, Figure 2 being a sectional view taken along the line II-II in Figure 1, and Figure 3 being a cross-sectional view taken along arrows II--II in Figure 1. The figure is III- in Figure 1.
FIG. 4 is a sectional view taken in the direction of arrow III, and FIGS. 4 to 6 show an underwater stable fin for ships as an embodiment of the present invention. FIG. 4 is a partially cutaway plan view of the fin, and FIG. V-V in Figure 4
6 is a sectional view taken along the line VI-VI in FIG. 4. 1... Underwater stable fin, 2... Hull, 3
...Buoyancy member, 4...Synthetic resin layer.

Claims (1)

[Scope of utility model registration request] An underwater stable marine fin characterized by being formed into an airfoil shape by laminating a synthetic resin surface on the outer surface of a solid buoyancy member made of a large number of hollow microscopic glass spheres hardened with resin.