JP2020172136A - Boat with keel structure mixed with foam material - Google Patents

Abstract

To provide a boat with a keel structure mixed with foam material, which prevents water from entering the keel structure.SOLUTION: A boat 100 with a keel structure mixed with foam material comprises a nearly tubular- and U-shaped floating body 1, a bottom plate 2 provided at the bottom of the floating body 1, a tail plate 3 provided at the rear end of the floating body 1 and of the bottom plate 2, and a keel structure body 4 provided at the bottom of the bottom plate 2. The keel structure body 4 has a concave shape recessed downward, protrusion 41 formed at the bottom, and a concavity 42 formed at the top. A foam material 5 is filled in the concavity 42. As a result, it is possible to prevent water from entering the keel structure body 4.SELECTED DRAWING: Figure 5

Description

The present invention relates to a keel-structured boat containing a foam material, and more particularly to a keel-structured boat having a keel structure provided at the bottom of a buoyant body.

Rubber boats or boats with foam material have light and convenient properties, especially boats with foam material have higher strength and load capacity, so various lifeboats, transport boats, fishing boats, etc. Widely used in the field of.

The conventional boat containing a foam material is provided with a keel structure for supporting the buoyant body of the boat at the bottom thereof, thereby suppressing the bending of the buoyant body. The keel structure has a downward concave shape so as to form a protrusion and a recess.

One of the purposes of forming recesses in the keel structure is to reduce weight. When the keel structure is arranged at the bottom of the bottom plate, a closed space can be formed by closing the recess of the keel structure with the bottom plate. Along with this, the buoyancy of the boat itself can be increased.

However, the keel structure may be damaged because its protrusions are located below the surface of the water. In that case, water enters the keel structure and affects the buoyancy of the hull.

In view of these circumstances, the present inventor has repeatedly studied, actively researched, and engaged in research on related products for many years, and has reached the constitution of the present invention through continuous experiments and improvements.

An object of the present invention is to provide a boat of a keel structure containing a foam material, which prevents water from entering the keel structure.

In order to achieve the above object, the boat having a keel structure containing a foam material according to the present invention has a buoyant body having a substantially tubular and U-shaped shape, a bottom plate provided at the bottom of the buoyant body, and after the buoyant body and the bottom plate. A tail plate provided at the end and a keel structure provided at the bottom of the bottom plate are provided, and the keel structure has a concave shape that is recessed downward, a protrusion is formed at the bottom, and a recess is formed at the top. The recess is filled with a foam material.

Further, the boat having a keel structure containing a foam material according to the present invention preferably has at least one injection portion capable of injecting a foam material into a recess of the keel structure on the bottom plate.

Further, in the boat having a keel structure containing a foam material according to the present invention, the keel structure is preferably made of a hard and elastic composite material for weight reduction and strength improvement.

Further, the boat having a keel structure containing a foam material according to the present invention is preferably made of a polymer fiber board or fiber reinforced plastic (FRP) in order to reduce the weight and improve the strength of the keel structure.

Further, in the boat having a keel structure containing a foam material according to the present invention, a foamable polymer material having a low specific gravity is preferably used for the foam material in order to reduce the weight.

Further, in the boat having a keel structure containing a foaming material according to the present invention, a foamable synthetic resin material is preferably used for the foaming material in order to reduce the weight.

In the present invention, preferred embodiments will be described below with reference to the technical means, components and effects thereof taken to achieve the above and other objects.

Schematic exploded view showing the boat before the foam material is injected. A perspective view of the boat from the bottom before the foam material is injected. A schematic notch of a part of the keel structure before the foam material is injected. Top view showing the boat before the foam material is injected. A schematic notch of a part of the keel structure after the foam material is injected.

As shown in FIGS. 1 to 5, the boat 100 having a keel structure containing a foam material according to the present invention has a buoyant body 1 having a substantially tubular shape and a U shape, a bottom plate 2 provided at the bottom of the buoyant body 1, and a buoyant body. It includes a tail plate 3 provided at the rear end of 1 and the bottom plate 2, and a keel structure 4 arranged at the bottom of the bottom plate 2. The keel structure 4 has a concave shape that is recessed downward, and a protrusion 41 is formed at the bottom and a recess 42 is formed at the top. By filling the recess 42 with the foaming material 5, it is possible to prevent water from entering the keel structure 4. The details will be described below.

1 to 4 are schematic exploded views showing a boat 100 before the foam material is filled in the recess 42 of the keel structure 4. FIG. 5 is a schematic view showing a state in which the foam material 5 is filled in the recess 42 of the keel structure 4.

The buoyancy body 1, the bottom plate 2 and the tail plate 3 can form, for example, a solid buoyancy body for carrying a person or an object.

As shown in FIG. 2, the keel structure 4 can be fixed to the bottom of the bottom plate 2 by, for example, a hot melt method. It is conceivable that the keel structure 4 is made of a material such as rubber. Alternatively, the keel structure 4 may be made of a hard and elastic composite material such as polymer fiberboard or fiber reinforced plastic (FRP). As a result, the weight and strength of the boat 100 can be improved.

The keel structure 4 has a downwardly recessed shape, and a protrusion 41 is formed at the bottom thereof, and a recess 42 is formed at the top thereof. The protrusion 41 can form various shapes. For example, by forming a substantially quadrangular pyramid-shaped protrusion 41 so that the bottom of the keel structure 4 is convex downward, it looks like a keel of a boat. It has a supporting function to support the buoyant body 1 and prevent the buoyant body 1 from bending. Further, when the ship is moving forward, the protrusion 41 can crush water to reduce resistance, and the wave crushing effect is improved. In addition, when the boat receives waves coming from the side, the keel structure breaks the waves and reduces the impact force, so the purpose of improving the effect of adapting to the waves is achieved.

As shown in FIG. 3, when the keel structure 4 is arranged at the bottom of the bottom plate 2, the bottom plate 2 can seal the recess 42 and form a sealed space. As a result, the keel structure 4 supports the buoyant body 1. Further, the weight can be reduced by forming the recess 42 in the keel structure 4.

As shown in FIGS. 4 to 5, the injection port 21 may be provided on the bottom plate 2. As a result, the foaming material 5 can be easily injected into the recess 42 through the injection port 21. The foaming material 5 is a foaming polymer material having a low specific gravity, for example, a foamable synthetic resin material such as polyesteramine or ethylene / vinyl acetate copolymer (EVA).

By filling the recess 42 with the foam material 5, the foam material 5 is filled in the recess 42 with almost no increase in weight, so that water can be prevented from entering the keel structure 4. Further, even if the keel structure 4 is damaged, it is possible to prevent water from entering the recess 42.

The present invention is not limited to the above-described embodiments, and it goes without saying that the present invention also extends to those with various modified designs.

100 ・ ・ ・ Keel structure boat with foam material 1 ・ ・ ・ Buoyant body 2 ・ ・ ・ Bottom plate 21 ・ ・ ・ Injection port 3 ・ ・ ・ Tail plate 4 ・ ・ ・ Keel structure 41 ・ ・ ・ Protruding part 42 ・ ・・ Recess 5 ・ ・ ・ Foam material

In order to achieve the above object, the boat having a keel structure containing a foam material according to the present invention has a buoyant body having a substantially tubular shape and a U shape, a bottom plate provided at the bottom of the buoyant body, and after the buoyant body and the bottom plate. The tail plate provided at the end and the keel structure provided at the bottom of the bottom plate are provided, and the keel structure has a concave shape that is recessed downward and is substantially convex downward toward the bottom. A quadrangular pyramid-shaped protrusion is formed, a groove is formed at the top, the groove is filled with a foam material, and the bottom surface of the protrusion is arranged so that the apex faces the front-rear direction and the left-right direction of the boat. ing.

Claims (6)

A keel-structured boat with foam material
A buoyant body that is approximately tubular and U-shaped,
A bottom plate provided at the bottom of the buoyant body and
The buoyant body, the tail plate provided at the rear end of the bottom plate, and
A keel structure provided at the bottom of the bottom plate and
With
The keel structure has a concave shape that is recessed downward, a protrusion is formed at the bottom, and a recess is formed at the top.
A boat having a keel structure containing a foaming material, wherein the recess is filled with a foaming material. The boat having a keel structure containing a foaming material according to claim 1, wherein the bottom plate is provided with at least one injection portion capable of injecting the foaming material into the recess. The boat having a keel structure containing a foam material according to claim 1, wherein the keel structure is manufactured of a hard and elastic composite material. The boat having a keel structure containing a foam material according to claim 3, wherein the keel structure is manufactured of a polymer fiber board or a fiber reinforced plastic. The boat having a keel structure containing a foaming material according to claim 1, wherein the foaming material is a foamable polymer material having a low specific gravity. The boat having a keel structure containing a foaming material according to claim 5, wherein the foaming material is a foamable synthetic resin material.