JPH0920292A - Small ship - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an engine from flooding of water through an exhaust gas pipe even when a boat body is overthrown and inclined to even either the right or the left side. SOLUTION: An engine 14 is arranged on a central line 101 in the direction of the length of a boat body 100. After an exhaust gas pipe 40 from the engine 14 is lead out to one side of the central line 101, the exhaust gas pipe is lead over the central line 101 to the other side of the central line 101. The exhaust gas pipe 40 situated upper stream from a part extending over the central line 101 is positioned on one side of the central line 101 and the exhaust gas pipe 40 situated downstream from a part extending over the central part 101 is positioned on the other side of the central line 101. The tip part of the exhaust gas pipe 40 is opened on the other side of the central line 101 to the outside of the boat, and a large volume room 44 is arranged in the middle of the exhaust gas pipe 40.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a small ship, and more particularly to an improvement in an exhaust gas discharging structure thereof.

[0002]

2. Description of the Related Art In recent years, small boats equipped with an engine which glide on water have been widely used. In these small vessels in which an engine is mounted onboard, exhaust gas from the engine is guided to an appropriate position on a ship side outer plate by an exhaust gas pipe and discharged.

[0003]

The ship constructed as described above glides on the water surface at a high speed and performs various operations (movements) such as sudden starting and sudden turning, and therefore, the capsizing often occurs. Will be. Then, when the vehicle is capsized, there is a problem that water enters the engine from an exhaust gas pipe opened to the ship side outer plate.

In Japanese Utility Model Laid-Open Publication No. Sho 59-115833, an exhaust gas pipe from an engine disposed on a center line in the longitudinal direction of a hull is led out to one side of the center line, and then the center line is passed over the center line. To the other side, and further from the center line to one side of the center line, and then open to the outside of the boat on one side of the center line. That is, this exhaust gas pipe crosses the hull center line twice,
Because the exhaust gas pipe derived from the engine and the tip opening of the exhaust gas pipe are arranged on the same side of the center line,
The installation space for other parts is impaired. Also, when the hull is tilted so that the opening at the tip of the exhaust gas pipe is down to impair the weight balance between the left and right sides of the hull, the hull sinks greatly into the water and the tip of the exhaust gas pipe A large amount of water enters the exhaust gas pipe through the opening.

The present invention has been made in order to solve the above-mentioned conventional drawbacks. Even if the hull capsizes and leans to either the left or right side, water can enter the engine through the exhaust gas pipe. It is an object of the present invention to provide a small boat having a structure capable of preventing the above.

[0006]

According to the present invention, an engine is arranged on a center line in the length direction of a hull, and an exhaust gas pipe from the engine is led to one side of the center line, and then the center line is crossed. Guide the exhaust gas pipe to the other side of the center line, locate the exhaust gas pipe upstream of the portion exceeding the center line on one side of the center line, and place the exhaust gas pipe downstream of the portion exceeding the center line. The exhaust gas pipe is located on the other side of the center line, the tip of the exhaust gas pipe is opened outside the boat on the other side of the center line, and a large volume chamber is provided in the middle of the exhaust gas pipe.

In the above arrangement, the exhaust gas pipe is led out to one side of the center line from the engine arranged on the center line in the hull length direction, and then led to the other side of the center line beyond the center line in the hull length direction. Since the end of the exhaust gas pipe is opened to the outside of the boat on the other side of the center line, it is possible to prevent water from entering the engine even if the hull is overturned and inclined to either side. In other words, when the boat body is inclined with the opening side of the exhaust gas pipe facing down due to capsize, even if water infiltrates into the exhaust gas pipe from the opening, this water crosses the hull center line and The exhaust gas pipe does not reach the inside of the exhaust gas pipe arranged on one side of the center line, and when the boat body tilts to the opposite side to the opening of the exhaust gas pipe due to overturning, the opening of the exhaust gas pipe is above the water surface. Due to the position, water does not enter the exhaust gas pipe from the opening, and therefore water does not enter the engine even if the hull overturns and tilts to the left or right.

The exhaust gas pipe upstream of the portion exceeding the center line in the boat hull length direction is located on one side of the center line, and the exhaust gas pipe downstream of the portion exceeding the center line is positioned at the center. Since the exhaust gas pipe is located on the other side of the line, the portion where the exhaust gas pipe exceeds the center line is one place, and the exhaust gas pipe derived from the engine and the opening at the tip of the exhaust gas pipe are on one side of the center line. It is distributed to the other side and does not impair the installation space for other parts. In addition, since the right and left weight balance of the hull is improved, it is possible to avoid that the hull sinks greatly in the water when the hull inclines to either side, and the hull is overturned. Accordingly, even if the engine is tilted to the left or right, water can be reliably prevented from entering the engine.

Further, since a large volume chamber is provided in the middle of the exhaust gas pipe, seawater enters through the exhaust gas pipe and enters the engine when the engine is stopped, for example, when the ship is moored. Can be prevented.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGS.
Reference numeral 00 denotes a bottom plate 20, an upper deck 21 formed on the front side of the center of the hull, and a portion surrounded by a deck member behind the bottom plate 20 having a drainage volume. And a substantially enclosed engine room 29 is formed in a portion surrounded by. A seat 50 protrudes from the center of the hull in the width direction behind the hull, and a foot deck 30 that opens to the stern end is formed between the seat 50 and the gunnels 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 hatch 28 which is a part of the upper deck 21 is provided at the front side of the seat 50. A handle support 61 projects from the hatch 28. The handle 60 is formed at the upper end. This hatch 28 is formed so as to project, and an engine room 29 below which is a buoyancy space is formed.
Are formed. The operator 11 on the seat 50 holds the foot on the foot deck 30 while holding the handle 6
The boat body 100 is steered while holding 0, so that the pilot 11 can move the weight forward, backward, left and right from this state.

Below the seat 50, a water suction port 32 at the bottom of the boat, a flow path 33 connected to the water suction port 32, and a nozzle 34 swinging horizontally at the stern are arranged. A propeller (not shown) in 33 rotates, sucks water from a water suction port 32, and jets water from a nozzle 34 through a flow path 33 to generate a propulsive force and a turning force.

A cylindrical section 70 having an inverted U-shaped cross section surrounding the flow path 33 is mounted around the flow path 33. The front end of the cylindrical portion 70 is closed by a partition 71,
The rear end is open to the stern. Further, an exhaust gas pipe 40 is drawn out from the engine 14 toward one side of the hull and connected to a large volume chamber 44 on one side of the hull, and the exhaust gas pipe 40 derived from the large volume chamber 44 is folded back. The hull is guided to the other side of the hull over the hull length direction center line 101, further guided in the stern direction, and the tip of the hull penetrates inward from the side of the tubular portion 70. The exhaust port 41 opens outside the boat.

In the above structure, exhaust gas is generated from the engine 14 when the ship is traveling, and the exhaust gas is sent from the exhaust gas pipe 40 into the large volume chamber 44 and further sent out through the exhaust gas pipe 40. It is discharged from the exhaust port 41 to the inside of the tubular portion 70.

The exhaust gas discharged into the interior of 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 contact the outer surface of the hull at all. Exhaust gas smoke comes into contact only with the vicinity of the exhaust port in the cylindrical portion 70 and is not a portion that can be seen from the outside. Therefore, there is no possibility that the appearance is impaired by the exhaust gas. Further, since the inside of the tubular portion 70 has a negative pressure while the hull is running, it has an effect of sucking exhaust gas, has an effect of improving exhaust performance, and has a sound-muffling effect.

In this configuration, the hull lengthwise center line 1
After the exhaust gas pipe 40 is led out from the engine 14 disposed above the center line 101 to one side of the center line 101, the exhaust gas pipe 40 is guided to the other side of the center line 101 beyond the hull length center line 101, and Since the distal end of the exhaust gas pipe 40 is opened to the outside of the boat on the other side, it is possible to prevent water from entering the engine 14 even if the hull 100 is overturned and inclined to either side. That is, when the hull 100 is inclined with the opening 41 side of the exhaust gas pipe 40 facing down due to capsize,
Even if water intrudes into the exhaust gas pipe 40 from the opening 41, the water passes over the hull center line 101 and the center line 10.
1 does not reach the inside of the exhaust gas pipe 40 disposed on one side, and when the hull 100 is inclined to the opposite side to the opening 41 of the exhaust gas pipe 40 due to capsize, the exhaust gas pipe 40
Since the opening 41 is located on the water surface, water does not enter the exhaust gas pipe 40 from the opening 41. Therefore, even if the hull 100 is overturned and inclined to the left or right, the engine 14 No water enters.

Further, the exhaust gas pipe 40 upstream of a portion exceeding the center line 101 in the hull length direction is located on one side of the center line 101, and the exhaust gas pipe 40 downstream of the portion exceeding the center line 101 is located. The tube 40 is connected to the center line 101
, The portion where the exhaust gas pipe 40 exceeds the center line 101 becomes one place and the engine 1
The exhaust gas pipe 40 derived from 4 and the front end opening 41 of the exhaust gas pipe 40 are distributed to one side of the center line 101 and the other side, so that the installation space for other parts is not damaged. In addition, since the right and left weight balance of the hull 100 is improved, it is possible to prevent the hull 100 from sinking greatly in the water when the hull 100 is tilted to the left or right side. Even if the body 100 overturns and leans to the left or right, water can be reliably prevented from entering the engine 14.

Further, the large volume chamber 44 is disposed on one side of the hull with respect to the center line 101, and the large volume chamber 44 and the exhaust gas pipe 40 are arranged.
Of the center line 101 and the other side. For this reason, it is possible to prevent the water from entering the large volume chamber 44 and eventually the engine 14 when the hull 100 is overturned, while keeping the right and left weight balance of the hull 100 good. Further, since the large volume chamber 44 is arranged on the same side as the outlet of the exhaust gas pipe 40 led out from the engine 14 with respect to the center line 101 in the lengthwise direction of the hull, the length from the engine 14 to the large volume chamber 44 is shortened. Therefore, the output of the engine 14 can be improved.
Further, the large volume chamber 44 is disposed outside the hull with respect to the engine 14, and the length in the hull length direction is longer than the length in the hull width direction. That is, the large-volume chamber 44 is arranged by utilizing the dead space near the hull outer plate, and the length in the hull length direction is made longer than the length in the hull width direction. 44 can have a large capacity.

[0019]

As described above, in the structure of the present invention, after the exhaust gas pipe is led to one side of the center line from the engine arranged on the center line in the hull length direction, the exhaust gas pipe is crossed over the center line in the hull length direction. Guide to the other side of the center line, and the tip of the exhaust gas pipe was opened to the outside of the boat on the other side of the center line. It is possible to prevent entry. In other words, when the boat body is inclined with the opening side of the exhaust gas pipe facing down due to capsize, even if water infiltrates into the exhaust gas pipe from the opening, this water crosses the hull center line and The exhaust gas pipe does not reach the inside of the exhaust gas pipe arranged on one side of the center line, and when the boat body tilts to the opposite side to the opening of the exhaust gas pipe due to overturning, the opening of the exhaust gas pipe is above the water surface. Due to the position, water does not enter the exhaust gas pipe from the opening, and therefore water does not enter the engine even if the hull overturns and tilts to the left or right.

Further, the exhaust gas pipe upstream of the portion exceeding the center line in the longitudinal direction of the hull is located on one side of the center line, and the exhaust gas pipe downstream of the portion exceeding the center line is positioned at the center. Since the exhaust gas pipe is located on the other side of the line, the portion where the exhaust gas pipe exceeds the center line is one place, and the exhaust gas pipe derived from the engine and the opening at the tip of the exhaust gas pipe are on one side of the center line. It is distributed to the other side and does not impair the installation space for other parts. In addition, since the right and left weight balance of the hull is improved, it is possible to avoid that the hull sinks greatly in the water when the hull inclines to either side, and the hull is overturned. Accordingly, even if the engine is tilted to the left or right, water can be reliably prevented from entering the engine.

Further, since a large volume chamber is provided in the middle of the exhaust gas pipe, seawater enters through the exhaust gas pipe and enters the engine due to a rippling wave generated by another ship when the engine is stopped, for example, when moored. Can be prevented.

[Brief description of the 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. 1;

[Explanation of symbols]

 11 Operator 14 Engine 40 Exhaust Gas Pipe 41 Exhaust Port 44 Large Volume Room 100 Hull 101 Centerline in the longitudinal direction of the hull

Claims (1)

[Claims] 1. An engine is arranged on the center line in the lengthwise direction of a hull, and an exhaust gas pipe from the engine is led to one side of the center line and then to the other side of the center line beyond the center line. , The exhaust gas pipe upstream of the portion over the center line is located on one side of the center line, and the exhaust gas pipe downstream of the portion over the center line is located on the other side of the center line. A small vessel characterized in that a tip end portion of the exhaust gas pipe is opened to the outside of the boat on the other side of the center line and a large volume chamber is provided in the middle of the exhaust gas pipe.