JP3045721B2 - Small jet propulsion boat - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention
The present invention relates to a small jet propulsion boat that travels at high speed on the sea with up to three people.

[0002]

2. Description of the Related Art Heretofore, small jet propulsion boats, which are small boats equipped with an engine and run on water, have been widely used. This propulsion boat has an engine inside the boat,
A variety of exercises such as slow rams, jumps, and tricks are performed by gliding over the water at high speed.A seat is provided on the center line of the hull, and an operating handle is provided at the front of the hull. The player controls the deck with his feet on it.

Since the jet propulsion boat glides on the water at high speed and performs various movements such as a sharp turn, it is necessary to prevent water splashes from entering the engine room through a ventilation pipe (air intake). Is desired.

[0004]

However, it has been difficult to prevent water droplets and the like during sliding from entering the engine room from the ventilation pipe while exerting a good ventilation function.

SUMMARY OF THE INVENTION The present invention has been made to solve such a conventional problem, and it is a small jet capable of preventing water splashes and the like during gliding from entering a ventilation pipe into an engine room. It is intended to provide a propulsion boat.

[0006]

According to the present invention, a deck member forming an upper half of a hull and a hull member forming a lower half of a hull are joined to each other at a peripheral portion thereof. The engine is mounted in an engine room formed inside the hull, and a seat base is formed on the deck member on the hull center line, and a seat is mounted on the seat base. In a small jet propulsion boat in which a deck on which feet are placed on both left and right sides of the seat stand,
A ventilation pipe having an upper end portion penetrating the upper surface of the seat base and opening into a space between the seat and the seat base so as to be covered from above by the seat, and a lower end part opening into the engine room is provided. The left and right ends of the seat are formed so as to be located lower than the upper end of the ventilation pipe on the left and right sides of the ventilation pipe.

In the above construction, the upper end of the ventilation pipe penetrates through the upper surface of the seat base and opens into the space between the seat and the seat base so as to be covered from above by the seat. Is formed below the upper end of the ventilation pipe on both the left and right sides of the ventilation pipe, so that water splashes etc. while sliding are blocked by the left and right ends of the seat, Water can be prevented from entering the engine room from the upper end.

[0008]

Embodiments of the present invention will be described below in detail with reference to the drawings.

In FIG. 1 to FIG. 4, a hull 1 has a hull member (hull) 2 which forms the lower half of the hull 1 and a deck which forms the upper half of the hull 1, which are integrally formed by FRP. The members 3 are joined to each other at their peripheral edges, and a portion surrounded by the hull member 2 and the deck member 3 is formed in a closed space so as to have a drainage volume.

The hull member 2 has a bottom plate 20 and a side plate 22. A rising portion 31 is formed on the deck member 3 at the peripheral edge except for the stern end.
2 is overlapped and joined to the upper end (joint 2
3).

The bulging work 8 is formed by the rising portion 31 and the folded portion from the upper end. The inside 80 of the bulwark 8 is filled with plastic foam (see dotted) over the inside of the hull member 22 and the bottom plate 20 of the hull member 2. The foam of the interior 80 has a large restoring force on the hull, and as shown in FIG.
The center line 10 of the hull is set to be higher than the draft surface 91.

The deck member 3 includes a hull center line 10.
A seat base 5 and an operating handle base 6 are formed to protrude on the upper side, and on both sides thereof, a deck 30,
A deck 33 is formed on the front side, and both decks 30 and 33 are formed substantially continuously in a single plane.
The stern end is open.

An operation handle 60 is mounted on the operation handle base 6, and a seat 5 is provided on the seat base 5 at a rear portion thereof.
0, the seat 51 is formed in the front part.

An engine room 12 is formed below the operation handle base 6 and the seat base 5, and an engine 14 and a fuel tank 15 are arranged in the engine room 12, and a propeller (not shown) is operated by the engine 14. By rotating and sucking water from the water suction port 36 at the bottom of the ship, passing the water through the flow path 37, and jetting water in a predetermined backward direction from the nozzle 38 that swings horizontally at the stern, the turning force and the propulsion force are reduced. To make it happen.

A pair of ventilation pipes 4a, 4b are provided on the hull center line 10 at the front and rear, and upper end portions 40, 42 of the ventilation pipes 4a, 4b.
As shown in FIG. 5 and FIG. 6, the piercing penetrates the upper surface of the seat base 5 and opens to the outside of the hull. Further, flange portions 48 and 49 are formed on the ventilation pipes 4a and 4b, respectively, and the flange portions 48 and 49 are respectively attached to the upper surface of the seat base 5 at the through portions. Air is taken into the engine room 12 by the front ventilation pipe 4a, and air in the engine room 12 is discharged by the rear ventilation pipe 4b.

The ventilation pipes 4a, 4b
The lower ends 41 and 43 of the are open into the engine room 12,
The lower ends 41 and 43 have a hull of 180 ° as described later.
It is located above the draft surface when overturned. As shown in FIG. 10 (b), the draft surface refers to a draft surface under the condition that no occupant is on board and no luggage is loaded. A ventilation hose 45 for a fuel tank and a ventilation hose 46 for a battery are connected near the lower ends of the ventilation pipes 4a and 4b.

As is apparent from FIGS. 5 and 6, the left and right ends 50a, 51a of the seats 50, 51 are located on the left and right sides of the ventilation pipes 4a, 4b, respectively. 4b upper end part 4
It is formed so as to be located below 0,42.

As shown in FIGS. 7 to 9, a step 7 is formed integrally with the deck 30 near the rear end of the deck 30, and this step 7 allows the person 11 to step on a foot during high-speed running. It is formed to be inclined forward.
Step 7 is partially cut out in the width direction to form steps 74 and 75 on both sides thereof.
A substantially L-shaped support plate 71 is attached along 5, and a flap 72 made of a flexible material such as rubber is attached to the support plate 71 by bolts 73. In this mounting state, as shown in FIG. 8, an opening 77 is formed below the support plate 71, and the flap 72 is bent forward because both ends are supported by the rear part of the step 74. However, it bends backward as shown by the imaginary line.

In the above configuration, when a large tilting moment is applied due to a sharp turn or the like, the foam in the interior 80 of the bulwark 8 on both sides of the ship has a large buoyancy, so the restoring force is large, and Demonstrate excellent stability against various exercises. In the inclined state of 90 ° or less, as shown in FIG. 10A, the ventilation pipes 4a and 4b are located above the draft surfaces 91 and 92, and
In the inclined state of 0 ° or more, the upper ends 40 and 42 of the ventilation pipes 4a and 4b are located below the draft surfaces 93 and 94, respectively, as shown in FIG. , 4b lower end 4
Since 1, 43 are located above the draft surfaces 93, 94, intrusion of water into the engine room 12 is prevented.

Also, during normal skiing, as shown in FIG. 3, two people 11 straddle the seat 50, and the body can be stabilized by stepping on the step 7. Also, when fishing offshore, one person sits forward on the front seat 51 and puts his feet on the deck 33, and the other person sits backward on the seat 50, and Space can be used effectively.

Also, seawater or the like is launched on the deck 30 during the run, and the seawater or the like enters through the opening 77 of the step 7 and hits the flap 72 as shown by the arrow B, and the flap 2 is drawn along the imaginary line in FIG. It is bent as shown and discharged to the stern. Also, as shown by the arrow A, seawater from the rear may hit the flap 72, but the flap 72 does not bend because its both ends are supported by the rear ends of the steps 74 and 75. Therefore, seawater from the rear is blocked by the flap 72.

Further, left and right end portions 50 of the seats 50 and 51 are provided.
a, 50b are the ventilation pipes 4a, 4b on the left and right sides of the ventilation pipes 4a, 4b, respectively.
Of the seats 50 and 51 are prevented by the left and right ends 50a and 50b of the seats 50 and 51, and the ventilation pipes 4a and 4b. Of the engine room 12 from the upper end portions 40 and 42 of the vehicle.

[0023]

As described above, according to the present invention, the upper end portion of the ventilation pipe penetrates the upper surface of the seat base and is positioned between the seat and the seat base so as to be covered from above by the seat. Opening into the space, and the left and right ends of the seat are formed below the upper end opening of the ventilation pipe on both left and right sides of the ventilation pipe, so that water splashes etc. while sliding are left and right of the seat Blocked by both ends, it is possible to prevent water from flowing into the engine room from the upper end of the ventilation pipe.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a hull showing an embodiment of the present invention.

FIG. 2 is a plan view of the hull.

FIG. 3 is a side view of the hull.

FIG. 4 is a vertical cross-sectional shape diagram of a ventilation pipe attachment portion.

FIG. 5 is a sectional view taken along line VV of FIG. 4;

FIG. 6 is a sectional view taken along line VI-VI of FIG. 4;

FIG. 7 is a sectional view taken along line VII-VII of FIG. 2;

FIG. 8 is a sectional view taken along line VIII-VIII of FIG. 2;

FIG. 9 is a perspective view of a step.

FIGS. 10 (a) and 10 (b) are views corresponding to FIG. 1 showing a tilted state of the hull.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hull 2 Hull member 3 Deck member 4a, 4b Ventilation pipe 5 Seat stand 6 Operation handle 7 Step 40,42 Upper end 50,51 Seat seat 50a, 51a Left and right end 60 Operation handle

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-61-188294 (JP, A) JP-A-62-225496 (JP, A) JP-A-61-287896 (JP, A) JP-A 50-88 63695 (JP, A) Japanese Utility Model Showa 61-3198 (JP, U) Japanese Utility Model Showa 60-115200 (JP, U) Japanese Patent Publication No. 50-24519 (JP, B2) (58) Field surveyed (Int. ⁷ , DB name) B63B 35/73 B63H 21/00

Claims (1)

(57) [Claims] An engine room formed in a hull in which a deck member forming an upper half of a hull and a hull member forming a lower half of a hull are joined to each other at a peripheral edge thereof. An engine is mounted on the deck member, a seat stand is formed on the hull center line, seats are placed on this seat stand, and a deck on both left and right sides of the seat stand is formed on which a foot can be put. In the small jet propulsion boat, the upper end portion penetrates the upper surface of the seat base and opens into the space between the seat and the seat base so as to be covered from above by the seat, and the lower end part is the engine room. A ventilation pipe opening inside is provided, and the left and right ends of the seat are positioned lower than the upper end of the ventilation pipe on the left and right sides of the ventilation pipe. Small jet propulsion boat, characterized in that have been made.