JPH0662114B2 - Small vessel - 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 boat, and more particularly to an improvement in its exhaust gas emission structure.

[0002]

2. Description of the Related Art Recently, small ships equipped with an engine, which are designed to slide on water, have been widely used. In those small boats equipped with an engine onboard, the exhaust gas from the engine is guided to an appropriate position on the side plate of the ship by an exhaust pipe and discharged.

[0003]

The ship having the above-mentioned structure is capable of gliding on the water surface at high speed and performing various operations (movements) such as sudden start and sudden turn, and therefore, caps often occur. It will be. When capsized, there is a problem that water will enter the engine through the exhaust pipe that opens to the outer shell of the ship.

The present invention has been made in order to eliminate the above-mentioned conventional drawbacks, and even when a ship capsizes,
An object of the present invention is to provide a small boat having a structure capable of preventing water from entering the engine through an exhaust pipe.

[0005]

SUMMARY OF THE INVENTION According to the present invention, an engine is arranged on a center line in the length direction of a hull, and an exhaust pipe from the engine is led out toward one side of the hull, and then the center of the hull length direction is set. It leads the other side of the hull across the line and leads to the rear part of the hull, with its tip open to the outside of the hull.

[0006]

In the above structure, the exhaust pipe that is open to the outside of the boat on either side of the hull is guided to the other side beyond the center line in the hull length direction and then on the center line in the hull length direction. Since it is connected to the engine placed in, the water will be prevented from entering the engine even if the hull capsizes and leans to either side. That is, when the hull inclines toward the opening of the exhaust pipe, even if water enters from the exhaust pipe, it will not reach the part that is guided to the opposite side beyond the hull center line and will not capsize. Due to this, when the hull is tilted to the side opposite to the opening, water does not enter the exhaust pipe because the opening of the exhaust pipe is located above the water surface, so the hull capsizes and tilts to either side. Even so, no water enters the engine.

[0007]

1 and 2, a hull 100 includes a bottom plate 20, an upper deck 21 formed in front of the center of the hull, and a portion surrounded by a deck member behind the hull 100 as a drainage volume. An engine room 29 that is substantially sealed is formed in a portion surrounded by the bottom plate 20 and the upper deck 21. A seat 50 is formed so as to project from the center of the hull in the widthwise center of the hull, and a foot deck 30 that opens to the stern end is formed between the seat 50 and the guns 88 on both sides. The foot deck 30 and the lower side of the seat 50 are also configured to have a drainage volume.

A seat 50 is formed in the center of the hull, and an openable and closable hatch 28 which is a part of the upper deck 21 is provided on the front side of the seat 50. A handle support portion 61 projects from the hatch 28. The handle 60 is formed on the upper end portion thereof. This hatch 28 is formed so as to project, and an engine room 29 below which is a buoyancy space is formed.
Are formed. In addition, the operator 11 on the seat 50 puts his / her foot on the foot deck 30, and
The hull 100 is controlled by gripping 0, and from this state, the operator 11 can move the weight back and forth and left and right.

Below the seat 50, a water suction port 32 on the bottom of the ship, a flow passage 33 continuous to the water suction port 32, and a nozzle 34 that horizontally swings at the stern are arranged. A propeller (not shown) in 33 rotates, sucks water from the water suction port 32, and ejects the water from the nozzle 34 through the flow path 33 to generate a propulsive force and a turning force.

Around the flow passage 33, a tubular portion 70 having an inverted U-shaped cross section is attached so as to surround the flow passage 33. The front end of the tubular portion 70 is closed by the partition wall 71,
The rear end is open to the stern. Further, after the exhaust gas pipe 40 is drawn out from the engine 14 toward one side of the hull, it is folded back and guided to the other side of the hull beyond the centerline in the lengthwise direction of the hull and further to the stern direction. An exhaust port 41 is formed whose tip portion penetrates inward from the side portion of the tubular portion 70 and opens outside the boat at one side portion of the hull.

In the above structure, exhaust gas is generated from the engine 14 when the ship is traveling, the exhaust gas is sent out through the exhaust gas pipe 40, and is discharged from the exhaust port 41 into the inside of the tubular portion 70.

The exhaust gas discharged inside the tubular portion 70 is exhausted from the rear end (stern end) of the tubular portion 70, so that the exhaust gas smoke does not come into contact with the outer surface of the hull at all. The exhaust gas smoke comes into contact only with the vicinity of the exhaust port in the tubular portion 70 and not with a portion visible from the outside, and therefore, there is no possibility that the exhaust gas impairs the appearance. Further, since the inside of the tubular portion 70 has a negative pressure while the boat is traveling, it has an effect of sucking exhaust gas, which has an effect of improving exhaust performance and also has a sound deadening effect.

[0013]

As described above, in the structure of the present invention, the exhaust pipe which is open to the outside of the boat on either side of the hull is guided to the other side beyond the center line in the lengthwise direction of the hull. After
Since the hull is connected to the engine located on the centerline in the lengthwise direction, water is prevented from entering the engine even if the hull capsizes and leans to either side. That is, when the hull inclines toward the opening of the exhaust pipe, even if water enters from the exhaust pipe, it will not reach the part that is guided to the opposite side beyond the hull center line and will not capsize. Due to this, when the hull is inclined to the side opposite to the opening, water does not enter into the exhaust pipe because the opening of the exhaust pipe is located above the water surface, and therefore the hull capsizes and either side No water will enter the engine when tilted.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view of a hull showing an embodiment of the present invention.

FIG. 2 is a partially cutaway plan view of FIG.

[Explanation of symbols]

 11 Pilot 14 Engine 40 Exhaust Gas Pipe 41 Exhaust Port 100 Hull

Claims (1)

[Claims] 1. An engine is arranged on a center line in the hull length direction, an exhaust pipe from the engine is led out toward one side of the hull, and then the other side of the hull is crossed over the center line in the hull length direction. A small boat characterized in that it is guided to the rear of the hull and is opened at the tip of the boat to the outside of the hull.