JP2001088778A - Small vessel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a hull rear part from sinking more than specified and to improve an accelerating property. SOLUTION: A hull 3 has a vessel bottom plate 3a and a vessel side plate 3b, and a floating body 11 extending toward a vessel body front side from a vessel body rear part 2a is provided on a part making contact with water at the time of stopping and not making contact with water at the time of navigating at top speed out of the vessel side plate 3b by separating upward with a specified interval from a chine 3c which is a border of this vessel bottom plate 3a and the vessel side plate 3b on a small vessel 1 furnished with an outboard motor installing part to install an outboard motor 10 on the vessel body rear part 2a by constituting a vessel body 2 of the hull 3 and a deck 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a small boat equipped with a propulsion device.

[0002]

2. Description of the Related Art Some small boats have, for example, a hull composed of a hull and a deck, and have an outboard motor at the rear of the hull.

[0003]

A small boat equipped with such an outboard motor is used, for example, as a fishing boat. In particular, in a fishing competition, it is necessary to arrive at a predetermined fishing spot quickly. For this reason, acceleration is required. However, some outboard motors are heavy, and if the sinking of the rear part of the hull increases when the ship is stopped, the sinking may reduce the acceleration.

The present invention has been made in view of the above circumstances, and has as its object to provide a small boat capable of preventing the rear part of the hull from sinking more than a predetermined amount and improving acceleration.

[0005]

Means for Solving the Problems In order to solve the above problems and achieve the object, the present invention has the following constitution.

According to a first aspect of the present invention, there is provided a small boat having a hull constituted by a hull and a deck and having an outboard motor mounting portion for mounting an outboard motor at a rear portion of the hull. The ship has a side plate and is separated from the chine, which is the boundary between the bottom plate and the side plate, by a predetermined distance and upward, and in the side plate, the portion that gets wet when stopped but does not get wet when traveling at top speed. And a buoyancy body extending from a rear part of the hull toward a front side of the hull. 』
It is.

[0007] The terms "stop" and "running" mean that the occupant 1
This refers to the case where the ship stops or sails while the name is in the driver's seat. In addition, it is not necessary that all of the buoyancy bodies are provided in the side plate of the ship's side plate when it stops, but it does not get in the water when sailing.If at least a part of the buoyancy body is provided in such a part, Good. Further, the buoyancy member may be provided integrally with or separate from the ship side plate.

According to the first aspect of the present invention, the ship is separated from the chine, which is the boundary between the bottom plate and the side plate, by a predetermined distance upward, and the side plate gets wet when the boat stops, but sails at top speed. A buoyant body that extends from the rear of the hull toward the front of the hull is sometimes provided in a part that is not exposed to water, so the buoyant body prevents the rear part of the hull from sinking more than a predetermined amount, improves acceleration, and achieves top speed in a short time be able to. In addition, the buoyancy body is provided on the part of the ship side plate that is not exposed to water when sailing at top speed, preventing the buoyancy body from sinking in the water and causing water resistance when sailing at top speed. As a result, a sufficient top speed can be secured.

According to a second aspect of the present invention, there is provided a method according to claim 2, wherein a part of the bottom plate at the rear of the hull is notched, and a step is formed at a seat plate in front of the outboard motor mounting part. The small boat according to claim 1, wherein the small boat extends to the rear of the part. ].

[0010] According to the second aspect of the present invention, the bottom plate at the rear of the hull is partially cut away, and a step is formed on the seat plate in front of the outboard motor mounting portion, so that the buoyant body is connected to the step. Extends to the rear as well. Here, in order to achieve top speed in a short time, it is preferable to partially cut out the seat plate at the rear of the hull and provide a step on the seat plate in front of the outboard motor mounting portion to reduce the hull resistance. However, the buoyancy at the rear part of the hull is reduced by that amount, so that the rear part of the hull sinks when the ship is stopped, and the acceleration performance is deteriorated.
However, by providing the buoyancy body extending to the rear of the step portion, it is possible to prevent the rear part of the hull from sinking by a predetermined amount or more when the boat is stopped, and to improve the acceleration while securing the top speed.

According to a third aspect of the present invention, there is provided the method according to the first aspect, wherein a height from the chine to a lower end of the buoyant body is substantially the same as a width of the buoyant body in a hull width direction. The small boat according to claim 2. ].

According to the third aspect of the present invention, the height from the chine to the lower end of the buoyant body is substantially the same as the width of the buoyant body in the width direction of the hull, and splashes from the chine during sailing are approximately equal. Since the splashing occurs at 45 degrees, the splashing splash caused by the chine can be made less likely to be applied to the buoyant body.

According to a fourth aspect of the present invention, the front end of the buoyant body extends forward from the center of gravity of the hull in a state where the outboard motor is mounted on the outboard motor mounting portion, and the front end has a vertical direction. The small boat according to any one of claims 1 to 3, wherein a lower end surface of the small boat is inclined so as to be located upward as it goes forward so that the width of the boat becomes gradually narrower. ].

According to the fourth aspect of the present invention, the front end of the buoyant body extends forward from the center of gravity of the hull in a state where the outboard motor is mounted on the outboard motor mounting portion, and the buoyant body has a front end. The lower end surface is inclined so that it is located upward as it goes forward, and the width in the vertical direction at the front end of the buoyant body is gradually reduced, but the front edge of the water contact area where water contacts the bottom plate when the ship normally stops is more than the center of gravity position Is also located at the front, so that the front end of the buoyancy body smoothly sweeps the water surface at the start of acceleration. Therefore, the propulsion resistance of the ship is reduced and the acceleration is improved.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the small boat of the present invention will be described below. First, a small boat to which the present invention is applied will be described with reference to FIGS. 1 is a side view of a small boat, FIG. 2 is a bottom view of the small boat, FIG. 3 is a front view showing the left half of the hull of the small boat, and FIG. 4 is a partial perspective view of the hull of the small boat viewed from the bottom. FIG. 5 is a sectional view taken along line IV-IV in FIG.

A small boat 1 is used for a fishing boat such as a bass boat, for example. A hull 2 is formed by joining a bathtub-shaped hull 3 and a lid-shaped deck 4 in a watertight manner with a gunnel 90, and the hull 3 and the deck 4 are fiber-reinforced. It is formed of resin. Hull 3
It has a ship bottom plate 3a and a ship side plate 3b, and the boundary between the ship bottom plate 3a and the ship side plate 3b is a chine 3c. Six (3 in the left half) convex stripes 3a1 are formed in the ship bottom plate 3a in the front-rear direction, and knuckles 3b1 are formed in the ship side plate 3b in the front-rear direction. A driver's seat 5 is arranged at the center of the deck 4 and is driven by a steering wheel 6. A windshield 7 is provided in front of the handle 6.

At the rear part 2a of the hull, there is provided a mounting plate 8a as an outboard motor mounting portion for mounting the outboard motor 10 to the transom 3d. The outboard motor 10 is mounted on the mounting plate 8b via a mounting bracket 9. Attached, outboard motor 10
Can turn left and right and can be trimmed up and down. The outboard motor 10 is equipped with a four-cycle engine, and is heavier than one equipped with a two-cycle engine.

At the rear of the ship side plate 3b, a buoyant body 11 is provided at a predetermined distance above the chine 3c which is a boundary between the ship bottom plate 3a and the ship side plate 3b. This buoyancy body 11
Is provided on the ship side plate 3b so that the lower end of the rear part gets wet when the occupant is in the driver's seat 5 so that the lower end of the hull gets wet when the ship is stopped, but does not get wet entirely when sailing at top speed. It is provided so that it may extend toward the hull front side. The water surface at the time of stoppage with one occupant seated in the driver's seat 5 is indicated by L2 in FIGS. 1 and 2, and when the cruise is performed with one occupant seated in the driver's seat 5 (the throttle valve of the outboard motor). Is fully opened, that is, at the time of traveling at the top speed), and the water surface is indicated by L1. That is, at the time of sailing, the hull 2 rises above the water surface, and the water surface becomes L
It moves from 2 to L1. The buoyancy body 11 may be formed integrally with the ship side plate 3b, that is, the hull 3, or may be formed separately from the ship side plate 3b and adhered to the ship side plate 3b or fixed with bolts or the like. It is needless to say that a floating body such as styrene foam may be placed inside the buoyant body 11.

This small boat 1 is used, for example, as a fishing boat such as a bass boat, and it is necessary to arrive at a predetermined fishing spot promptly especially in a fishing competition, but a heavy outboard motor 10 is provided at the rear of the hull 2. By being attached, the rear portion of the hull 2 tends to sink greatly in the water, but the buoyant body 11 prevents the rear portion 2a of the hull from sinking more than a predetermined amount on the water surface, so that the water surface at the time of stopping is L2. . For this reason, the resistance of water is reduced at the time of acceleration after stopping the boat, the acceleration is improved, and the top speed can be achieved in a short time.

The hull bottom plate 3a of the hull 3 is partially cut away as shown in FIG. 4 to form a drain portion (step portion) 3e on the stern plate 3a in front of the transom 3d to which the outboard motor 10 is attached. And the rear end 11a of the buoyant body 11 is
It extends to the back. In order to increase the top speed of the small boat 1 in a short time, it is preferable to provide a draining portion 3e to reduce the hull resistance.
The buoyancy at the hull becomes smaller, so the hull rear
Sinks and acceleration becomes worse. However, since the rear end 11a of the buoyant body 11 extends rearward beyond the drainer 3e,
The buoyant body 11 prevents the rear part 2a of the hull from sinking by a predetermined amount or more when the boat is stopped, and improves the acceleration while securing the top speed. The buoyancy body 11 is
When sailing at top speed, the entire surface
Since it is located higher than 1, there is no adverse effect on the top speed.

The height H from the chine 3c to the lower end 11b of the buoyant body 11 is, as shown in FIG.
Is substantially the same as the width W of the hull in the width direction. As described above, since the height H and the width W of the buoyant body 11 are substantially the same, even if the water that jumps up from the chine 3c at the time of cruising can jump at about 45 degrees, it is difficult for the buoyant body 11 to hit the buoyant body 11. Can be accelerated.

The front end 11c of the buoyant body 11 extends forward from the center of gravity O of the hull 2 with the outboard motor 10 attached, and the lower end face of the buoyant body 11 is positioned upward as it goes forward. So that the vertical width at the front end 11c of the buoyant body 11 is gradually reduced. Normally, when the hull 3 stops, the front edge of the water contact area where the water comes into contact with the bottom plate 3a of the hull 3 is located forward of the center of gravity O as shown in FIG. The water surface will be swept smoothly. Therefore,
The propulsion resistance of the ship is reduced and the acceleration is improved.

[0023]

As described above, according to the first aspect of the present invention, the ship is separated from the chine, which is the boundary between the bottom plate and the side plate, by a predetermined distance upward, and the side plate gets wet when the boat is stopped, but the top speed. A buoyant body that extends from the rear of the hull toward the front of the hull is provided in a part that is not exposed to water when sailing on the hull, so that the buoyant body prevents the rear part of the hull from sinking more than a predetermined amount, improves acceleration, and reduces You can get top speed. In addition, the buoyancy body is provided on the part of the ship side plate that is not exposed to water when sailing at top speed, preventing the buoyancy body from sinking in the water and causing water resistance when sailing at top speed. As a result, a sufficient top speed can be secured.

According to the second aspect of the present invention, in order to achieve top speed in a short time, the seat plate at the rear of the hull is partially cut out and a step is provided on the seat plate in front of the outboard motor mounting portion. It is preferable to reduce the hull resistance, but since the buoyancy at the rear of the hull is reduced accordingly, the rear of the hull sinks when stopping and the acceleration is deteriorated, but it is necessary to provide a buoyant body extending beyond the step Accordingly, it is possible to prevent the rear part of the hull from sinking by a predetermined amount or more when the boat is stopped, and to improve the acceleration while securing the top speed.

According to the third aspect of the present invention, the height from the chine to the lower end of the buoyant body is substantially the same as the width of the buoyant body in the width direction of the hull, and the water splashing from the chine during sailing is about 45 degrees. Because of the jump, the splashes splashed by the chine can be made less likely to be applied to the buoyant body.

According to the fourth aspect of the present invention, the front end of the buoyant body extends forward from the center of gravity of the hull when the outboard motor is mounted on the outboard motor mounting portion, and the lower end surface of the buoyant body is extended. The buoyant body was inclined so that it would be located higher as it goes forward, and the width in the vertical direction at the front end of the buoyant body was gradually reduced.However, the front edge of the water-contact area where water comes in contact with the bottom plate when the ship normally stops is ahead of the center of gravity. Since it is located, the front end of the buoyancy body smoothly separates the water surface at the start of acceleration, and the propulsion resistance of the ship is reduced and the acceleration is improved.

[Brief description of the drawings]

FIG. 1 is a side view of a small boat.

FIG. 2 is a bottom view of the small boat.

FIG. 3 is a front view showing the left half of the hull of the small boat.

FIG. 4 is a partial perspective view of the hull of the small boat viewed from the bottom.

FIG. 5 is a sectional view taken along the line IV-IV in FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Small boat 2 Hull 2a Hull rear 3 Hull 3a Bottom plate 3b Ship side plate 3c Chine 4 deck 10 Outboard motor 11 Buoyancy body

Claims (4)

[Claims] A small hull comprising a hull and a deck, and an outboard motor mounting portion for mounting an outboard motor at a rear portion of the hull, wherein the hull has a bottom plate and a side plate. A predetermined distance upward from the chine, which is the boundary between the bottom plate and the side plate, a portion of the side plate that gets wet when stopped but does not get wet when traveling at top speed, and from the rear of the hull toward the front of the hull. A small boat characterized by having a buoyancy body extending. 2. A bottom plate at a rear portion of the hull is partially cut away, a step is formed on a seat plate in front of the outboard motor mounting portion, and the buoyant body is extended to the rear of the step portion. The small boat according to claim 1, wherein: 3. The small boat according to claim 1, wherein a height from the chine to a lower end of the buoyant body is substantially equal to a width of the buoyant body in a hull width direction. . 4. The front end of the buoyant body extends forward from the center of gravity of the hull in a state where the outboard motor is mounted on the outboard motor mounting portion, and the width of the front end in the vertical direction is gradually reduced. The small boat according to any one of claims 1 to 3, wherein a lower end surface is inclined so as to be located upward as it goes forward.