JPH0433195Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an underwater sightseeing boat used to observe fish in the sea, conditions on the seabed, etc.

[Conventional technology]

It is generally known that underwater sightseeing boats have a structure in which an observation window is installed on the bottom of the boat, but in such a structure, bubbles generated by the waves generated on the bow of the boat are outside the observation window, making it difficult to see the seabed, and also restricting visibility. There were many other problems.

In order to avoid such problems, an underwater sightseeing boat has recently been proposed that has a main hull with observation windows on the sides and float tanks on both sides (Japanese Patent Application Laid-open No. 214092/1983).

That is, as shown in Figures 4 and 5, this underwater tourist boat is composed of a main hull 2 that has observation windows 1 on both sides and is submerged in water, and a float tank 3 that extends along the main hull 2 on both sides of the main hull 2. The bottom surface 4 of the float tank 3 is formed as a flat surface located near the waterline to ensure a wide field of view from the observation windows 1 and in relation to the buoyancy of the hull. The thruster 5 operates at a specified water depth and is arranged at the rear of the main hull 2 to improve propulsion efficiency.

In addition, in Japanese Utility Model Publication No. 49-8292, a recess is provided in the lower surface of the center of the ship along the length direction of the ship, and an underwater sightseeing room whose front end protrudes upward is provided within this recess, and this underwater sightseeing room is attached to the hull. An idea has been proposed for an underwater sightseeing boat that can be moved up and down.

[The problem that the idea aims to solve]

However, the above-mentioned conventional underwater sightseeing boat consisting of a main hull and a float tank has the following problems.

In other words, since the bottom surface 4 of the float tank 3 is flat and located near the water line, waves etc. collide with the bottom surface 4 during sailing, producing a large amount of noise and shaking, resulting in extremely poor riding comfort. It is becoming.

On the other hand, since the propeller 5 is located at the rear of the main hull 2, the flow generated by the propeller 5 collides with the rear wall of the main hull 2, especially when moving astern, resulting in extremely poor propulsion performance. ing. Also, if the propulsion device is placed at the rear of the float tank, the main engine will be installed on the bottom of the float tank.
Because the float tank has shallow water, even if a propeller is connected to the main engine, it is not possible to ensure sufficient underwater depth for the propeller, resulting in poor propulsion efficiency.

For this reason, it is conceivable to extend the bottom surface 4 of the float tank 3 into a predetermined amount of water; however,
In this case, the buoyancy of the hull becomes large, requiring more ballast than necessary, which poses a practical problem.

Furthermore, in the idea described in Utility Model Publication No. 49-8292, an underwater sightseeing room is provided in the center of the hull, and float tanks are placed on both sides of the hull so that in the event of an emergency, this underwater sightseeing room Furthermore, the bottom of the float tank is shaped like the bottom of a ship to suppress noise and turbulence during cruising, and does not provide any hints about the location of the main engine. However, there is nothing.

[Means to solve the problem]

The present invention was developed in order to solve the above-mentioned problems, and consists of a main hull whose submerged part is reduced downward, an observation window in this part, and a main hull along both sides of the main hull. In cross section, the float tank has an inclined surface that descends from the side toward the center of the bottom, and a slope that extends from the center upward from the observation window of the main hull. It is an underwater sightseeing boat with a V-shaped bottom consisting of an ascending slope and a main engine located at the rear of the float tank.

[Effect]

Observation windows are provided in the submerged area below the main hull, and float tanks are provided on both sides of the main hull at positions above and to the sides of these observation windows. Since the bottom surface is formed into a V-shaped sloped bottom surface by combining a descending sloped surface and an upward sloped surface, even if waves collide with this sloped bottom surface, the flow will flow toward this V-shaped sloped bottom surface. Not only does it flow smoothly along the river, eliminating the generation of loud noise, but it also prevents unexpected damage caused by collisions with waves.

In addition, the installation height of the main engine is lowered by the sloping bottom of the rear part of the float tank, and the propulsion unit can be placed at a lower water depth position by that amount, which maintains propulsion performance while also allowing There will be no deterioration in performance.

〔Example〕

An embodiment of an underwater sightseeing boat according to the present invention will be described below with reference to FIGS. 1 to 3.

FIG. 1 is a side view of the underwater sightseeing boat 10, FIG. 2 is a horizontal sectional view thereof, and FIG. 3 is a view taken along the line A--A in FIG.

The underwater sightseeing boat 10 has a main hull 11 and a main hull 1.
1 and float tanks 12 disposed on both sides of the main hull 11 so as to extend along the main hull 11.

To be more specific, observation windows 14 are provided on both sides 13 of the main hull 11, and seats 15 are arranged inside, and bumpers 16 are attached to the outer front and rear parts.

The bottom surfaces of the float tanks 12 disposed on both sides along the main hull 11 are formed as inclined bottom surfaces 17 that slope downward toward the center, particularly in cross section, as shown in FIG. That is, the side wall 18 of the float tank 12 extends until it is located slightly below the water line ∇WL, and this side wall 18
The first inclined plate 19 is arranged to have an inclination angle of θ from the lower end toward the center, and the second inclined plate 20 is arranged to have an inclination angle of θ from the main hull 11. A bottom surface 17 is formed.

The inclination angle θ varies depending on the shape of the ship, but it is usually about 5 to 20 degrees, preferably about 12 to 17 degrees. A main engine 21 is provided inside the float tank 12, and a main engine 21 is provided at the rear of the float tank 12.
A propeller 22 driven by 1 is arranged.

In this underwater sightseeing boat 10, even if seawater or the like flows into the main hull 11 due to an unforeseen accident, the boat will float due to the buoyancy of the float tank 12, so there is no risk of sinking.

[Effect of idea]

As is clear from the above description, the underwater sightseeing boat according to the present invention has a main hull 11 whose submerged part is reduced downward, and has an observation window 14 in this part, and is arranged along both sides of this main hull 11. In cross section, this float tank 12 consists of an inclined surface 19 that descends from the side toward the center of the bottom, and an inclined surface 19 that rises from the center upward from the observation window 14 of the main hull 11. Slope 2
The main engine 21 is further arranged at the rear of the float tank 12.

Therefore, while ensuring the safety of the underwater sightseeing boat with this float tank 12, even if waves collide with this V-shaped sloped bottom surface 17, the flow will flow smoothly along the sloped bottom surface 17, so there will be a large impact. Not only does it not generate noise, but the energy of the colliding waves is dispersed along with the current, so unexpected damage can be avoided.

In addition, as the main engine 21 is located at the rear of the float tank 12 as shown in Figure 3, the height at which the propulsion device is installed is lowered by 17 minutes from the V-shaped inclined bottom surface, making it possible to ensure propulsion performance. In addition, it is possible to provide an underwater sightseeing boat with excellent maneuverability without deteriorating the performance when going astern.

[Brief explanation of the drawing]

1 to 3 show an embodiment of an underwater sightseeing boat according to the present invention, in which FIG. 1 is a side view, FIG. 2 is a horizontal sectional view, and FIG. 3 is a view taken along A-A in FIG. It is an arrow view. 4 and 5 are a side view and a cross-sectional view of a conventional underwater sightseeing boat. 1, 14... Observation window, 2, 11... Main hull,
3,12...Float tank, 4...Bottom, 5,
22...propulsion device, 10...underwater sightseeing boat, 13...
Side, 15...Seat, 16...Bumper, 17...
... Sloped bottom surface, 18 ... Side wall, 19 ... First slope plate, 20 ... Second slope plate, 21 ... Main engine.

Claims (1)

[Scope of utility model registration request] It consists of a main hull 11 whose submerged part is reduced downward and has an observation window 14 in this part, and a float tank 12 arranged along both sides of this main hull 11, and the float tank 12 has the following in cross section:
It is formed into a V-shaped inclined bottom surface 17 consisting of an inclined surface 19 that descends from the side toward the center of the bottom, and an inclined surface 20 that ascends from the center upward from the observation window 14 of the main hull 11. This underwater sightseeing boat has a main engine 21 located at the rear of this float tank 12.