JPH0635906Y2 - Air intake system for small planing boats - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention has a handle attached to the upper part of a bulging portion that gradually expands from the bow, and a saddle-type seat on the deck behind the bulging portion. The present invention relates to an intake device for inboard ventilation of a small planing boat that is formed and used for sports or leisure in coastal waters.

[Conventional technology]

The small planing boat is configured such that an engine mounted in a hermetically-sealed hollow hull drives a propulsion unit at the rear of the bottom of the boat to steer the steering wheel.

As the propulsion device, a water jet type or a propeller type can be used. In the case of the water jet type, steering can be performed by changing the direction of the nozzle.

As the steering mechanism, for example, a steering shaft that is vertically supported in the front half of the hull is rotated by the handle, and is remotely controlled by the rotation of the steering shaft.

By the way, in this type of small planing boat, an engine, a fuel tank, etc. are stored and mounted in the hull consisting of a sealed hollow shell with a plastic molded deck and hull joined. An intake device is provided to smoothly supply the intake air.

This intake device is composed of an intake port formed at a position as high as possible on the water, and is also used with an exhaust port for discharging the air in the hull to the outside in order to promote air circulation.

As a prior art, there is Jitsukai Sho 61-3198.

[Technical issues to be solved by the device]

However, in the conventional air intake system for small planing boats, only the intake port was formed above the water on the hull of the hull. Sometimes it entered the body.

Venting was sometimes inadequate due to insufficient air pushing force when opening backwards so that wave splash would not enter.

The present invention has been made in view of the above-mentioned prior art, and is directed to a small planing boat capable of sufficiently circulating air in the hull and reliably separating invading water to introduce only air into the hull. An object is to provide an intake device.

[Means for solving problems]

According to a first aspect of the present invention, in an air intake device for a small gliding boat that takes in air from the outside to ventilate the inside of a hull having a hollow hermetic structure, an independent seal that is projected from the upper surface of the hull upper surface and is cut off from the inside of the hull. A partition chamber that forms a space is provided, and an intake port that opens to the front in the traveling direction is formed on the front surface of the partition chamber, communicates with the inside of the hull at a position near the front of the bottom surface of the partition chamber, and from the bottom surface of the partition chamber. A duct for communication protruding upward by a predetermined height is provided, a guide member extending rearward from a position directly below the intake port is provided in the partition chamber, and a space through which air passes forward is provided below the guide member. An opening for drainage is formed at the front end portion of the bottom of the partition chamber, and by inverting the air flow from the intake port forward at the rear of the partition chamber, the separation of water from the air is promoted, and Sky The flow is guided to the upper end opening of the duct, the air separated from the water is taken into the inside of the hull through the duct, and further the separated water is drained along the bottom of the partition chamber to the outside of the hull through the drainage opening. With such a configuration, it is possible to enhance the intake efficiency by positively utilizing the dynamic pressure to inhale, and it is possible to enhance the gas-liquid separation efficiency of air and water when inhaling from above on the water, The separated water can be discharged smoothly outside the hull,
(EN) An intake device for a small planing boat capable of smoothly ventilating the inside of a hull and intake air to an engine.

According to a second aspect of the present invention, in addition to the above configuration, an air flow path from the intake port to the upper end opening of the duct is formed by a float of resin foam filled in the partition chamber. Accordingly, the present invention provides an air intake device for a small planing boat, which further increases the residual buoyancy and can easily cause the rollover.

[Action]

The air introduced into the partition chamber by utilizing the dynamic pressure from the intake port is separated into gas and liquid while passing through an air flow path formed of a guide passage such as a maze formed in the partition chamber.

The separated air is introduced into the hull through a duct.

The separated water flows through the bottom surface of the partition chamber in a predetermined direction without entering the duct, and then is discharged to the outside from the drain port.

Therefore, even when air is positively introduced by utilizing the dynamic pressure from the intake port formed toward the front when traveling, the wave splash (water) entering from the intake port is effectively separated and enters the inside of the hull. It is released outside the hull without entering.

〔Example〕

 Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 3 is a side view of a small watercraft embodying the present invention.
FIG. 4 is a plan view of FIG.

In FIGS. 3 and 4, a small planing boat 10 has a closed hollow shell hull 11 constructed by joining a plastic molded deck 12 and a hull 13 to the upper half of the deck. A handle 15 is attached to a hood-shaped deck front half portion 22 in which a protruding seat portion 14 is formed and which bulges upward from the front end.

A water jet propulsion unit 16 and a steering nozzle 17 are attached to the stern of the hull 13.

The propulsion unit 16 is driven by an engine 18 mounted inside the hull below the seat portion 14.

The handle 15 is fixed to the upper end of a steering shaft 19 which is axially supported by the front half portion 22 of the deck,
The rotation of the steering shaft 19 is transmitted to the steering nozzle 17 via a control wire or a link mechanism.

A fuel tank (not shown) and the like are mounted inside the hood-shaped first half of the hull.

Further, on the left and right sides and the front side (between the hood-shaped bulging portion) of the seat portion 14, a step portion 20 on which a passenger places his / her foot,
21 are provided.

However, an intake device 30 including an intake port 25 for taking in air for ventilating the inside of the hull 11 is provided at a position above the water of the hull 11, that is, at a high position of the deck front portion 22 in the illustrated example.

1 is a vertical sectional view of the intake device 30, and FIG. 2 is a horizontal sectional view taken along the line II-II in FIG.

In FIG. 1 and FIG. 2, a partition room 32, which is isolated from the inside 31 of the hull, is formed in the upper part of the deck front part 22.
The intake port 25 is formed on the front surface of the.

In the illustrated example, the partition chamber 32 is a separate hull upper cover 33.
Is formed inside by fixing it to the upper surface of the deck body 12, and a shaft support member 34 that pivotally supports the steering shaft 19 is fixed to the upper surface of the deck body 12 and the hull upper cover 33. The handlebar 15 and the handlebar cover 36 are fixed to the upper end of the steering shaft 19.

The steering shaft 19 extends into the inside 31 of the hull in a watertight state by using a sealing means such as an O-ring or a sealing member (not shown), and an operating member 37 is fixed to the lower end portion thereof.

The bottom of the partition chamber 32, that is, the deck body 12 in the illustrated example.
In the part that is also the top surface of the, the duct 38 leading to the inside 31 of the hull
Is provided.

The upper end opening of the duct 38 projects upward from the bottom surface of the partition chamber 32 by a predetermined height h so that water flowing along the bottom surface of the partition chamber 32 does not drop (enter) into the inside 31 of the hull. There is.

The partition chamber 32 is filled with a float 39 of resin foam which is arranged so as to cover the duct 38 with a predetermined space left as shown in the drawing.

The float 39 forms an air flow path (or a labyrinth structure) that guides the air coming from the intake port 25 to the upper end of the duct 38, and while the flow direction is reversed in the air flow path. It has a gas-liquid separation function of separating water that has entered with air such as splashes of water and dropping it to the bottom surface of the partition chamber 32.

The float 39 is formed of, for example, a polyethylene independent foam or the like that does not absorb water and generates buoyancy when submerged in water when it is rolled over, and is positioned on the inner surface of the partition chamber 32 by adhesion or the like. It is fixed.

The water that has entered from the intake port 25 together with the air and separated in the partition chamber 32 drops to the bottom surface of the partition chamber 32, flows along the bottom surface of the partition chamber 32 in a predetermined direction as shown by the arrow, and the partition chamber 32 Flows out through the opening 41 formed at the bottom of the.

In the illustrated example, a hatch is provided in front of the hull upper cover 33.
42 is formed, and the hatch 42 is sealed by a hatch cover 43. The separated water discharged from the partition chamber 32 through the opening 41 is discharged from the periphery of the hatch 42 to the outside of the hull as indicated by the arrow.

The air from which water has been separated and removed in the partition chamber 32 is introduced into the inside of the hull through the duct 38.

An exhaust port is formed at an appropriate position on the water of the hull 11 (Fig. 3), for example, at a position in the shadow of the seat portion 14, which is taken in from the intake 25 and passes through the inside 31 of the hull. The inside of the hull 31
It has a structure that allows smooth ventilation of air and supply of fresh air to the engine.

According to the intake device for a small planing boat described above with reference to FIGS. 1 to 4, since the intake port 25 is provided in the forward direction on the water, it is possible to use the dynamic pressure during traveling to utilize the air to hull the hull. It can be pushed into the inside, and ventilation of the inside 31 of the hull can be promoted.

Further, since the air introduced from the intake port 25 is removed by the gas-liquid separation structure in the partition chamber 32 even when it contains water splashes or when water is sprayed with the nose dive,
It is possible to prevent water from entering the inside 31 of the hull.

The separated water is discharged to the outside of the hull along the bottom surface of the partition chamber 32.

In this way, an intake device for a small planing boat can be obtained in which dynamic pressure is utilized to actively ventilate the inside 31 of the hull while preventing water from entering the inside 31 of the hull.

Further, a member formed of a resin foam is a member that forms a flow path of the air introduced into the partition chamber 32 and promotes the gas-liquid separation thereof.
Since it was composed of 39, increase the buoyancy of the high position of the hull 11,
It is possible to obtain a small planing boat that can easily be caused to roll over.

FIG. 5 is a cross-sectional view illustrating an exhaust device that exhausts (ventilates) the air inside the hull 31.

In FIG. 5, the seat portion 14 at the rear of the deck of the hull 11 (FIG. 3) has an opening 46 formed on the upper surface of a saddle-shaped projection 45 formed on the upper surface of the deck 12, and the opening 46 is sealed with a lid 47. In addition, the structure is such that a seat 48 filled with a cushion material is fastened to the upper surface of the lid 47 with bolts or the like, and a duct 49 communicating between the inside and the outside is provided in the lid 47, and the upper end of the duct 49 is connected to the seat 48 and the lid 47. An exhaust device for ventilating the inside 31 of the hull is configured by opening the space (outside) formed between and.

FIG. 6 is a longitudinal sectional view of the essential parts of a second embodiment of the intake device for a small planing boat according to the present invention.

In this embodiment, instead of the float 39 of the embodiment shown in FIG.
A structure is provided in which a guide plate 51 is provided to guide the air coming in from the intake port sufficiently rearward from the region directly above the duct 38.

The other parts of the embodiment of FIG. 6 are substantially the same as the structure of FIG. 1, corresponding parts are designated by the same reference numerals, and the description thereof will be omitted.

According to this embodiment, as in the case of the embodiment shown in FIG. 1, it is possible to push air into the inside 31 of the hull by utilizing the dynamic pressure at the time of traveling to promote the ventilation of the inside 31 of the hull, and moreover, the splash of waves. An air intake device for a small planing boat that can separate water in the partition chamber 32 and prevent the water from entering the inside of the hull even when water is sprayed with a nose dive or a nose dive.

FIG. 7 is a longitudinal sectional view of a main part of a third embodiment of the air intake device for a small planing boat according to the present invention.

In this embodiment, an umbrella-shaped roof 52 is added above the duct 38 in the structure shown in FIG.

The other parts of this embodiment are substantially the same as in the case of FIG. 1 or FIG. 6, corresponding parts are represented by the same numbers, and detailed description thereof will be omitted.

According to the embodiment shown in FIG. 7, the same effects as those of the embodiment shown in FIG. 6 are obtained, and since the roof 52 is provided above the duct 38, splashes of water or the like come in from the intake port 25 vigorously. Even at times, it was possible to further prevent water from jumping into the duct 38, and it was possible to prevent the water from entering the inside 31 of the hull.

[Effect of device]

As is clear from the above description, according to the invention of claim 1, in the intake device of a small gliding boat that takes in air from the outside to ventilate the inside of the hull having a hollow hermetic structure, it projects upward from the upper surface of the hull. In addition, a partition room that forms an independent closed space that is isolated from the inside of the hull is provided, an intake port that opens forward in the traveling direction is formed in the front of the partition room, and the ship is located at a position near the front of the bottom surface of the partition room. A communication duct that communicates with the inside of the body and projects upward from the bottom surface of the partition chamber by a predetermined height is provided, and a guide member that extends rearward from a position directly below the intake port is provided in the partition chamber. A space through which air passes forward, and a drainage opening is formed at the front end of the bottom of the partition chamber, so that the air flow from the intake port is reversed forward at the rear of the partition chamber to remove the air from the air. While promoting the separation of water, the air flow is guided to the upper end opening of the duct, the separated air is taken into the inside of the hull through the duct, and the separated water is guided along the bottom surface of the partition chamber. Since the water is drained from the drainage opening to the outside of the hull, it is possible to enhance the intake efficiency by positively using dynamic pressure to inhale, and the air and water vapor when inhaling from the front on the water. (EN) Provided is an intake device for a small planing boat, which can enhance liquid separation efficiency, can smoothly discharge separated water to the outside of a hull, and can smoothly perform ventilation in the hull and intake to an engine.

According to the invention of claim 2, in addition to the above configuration, an air flow path from the intake port to the upper end opening of the duct is formed by a float of resin foam filled in the partition chamber. Therefore, there is further provided an air intake device for a small planing boat which can increase the residual buoyancy and can easily cause the rollover.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of an intake device for a small planing boat according to the present invention, FIG. 2 is a transverse sectional view taken along line II-II in FIG. 1, and FIG. 3 is FIG. Left side view of a small planing boat equipped with the air intake system of FIG. 4, FIG. 4 is a plan view of FIG. 3, and FIG.
FIG. 6 is a horizontal cross-sectional view showing an exhaust system of a small planing boat, FIG. 6 is a vertical cross-sectional view of an intake system of a small planing boat according to a second embodiment of the present invention, and FIG. 7 is a small size according to a third embodiment of the present invention. It is a longitudinal cross-sectional view of the intake device of the planing boat. 10 …… Small planing boat, 11 …… Hull, 12 …… Deck, 25 ……
Intake port, 30 ... Intake device, 31 ... Inside hull, 32 ... Partition room, 38 ... Duct, 39 ... Float, 51 ... Guide plate, 52 ... Roof.

Claims (2)

[Scope of utility model registration request] 1. An air intake device for a small gliding boat that takes in air from the outside to ventilate the inside of a hull having a hollow closed structure, and an independent enclosed space that is projected upward from the upper surface of the hull and is isolated from the inside of the hull. A partition room to be formed is provided, and an intake port that opens forward in the traveling direction is formed on the front surface of the partition room, which communicates with the interior of the hull at a position near the front of the bottom surface of the partition room and which has a predetermined height from the bottom surface of the partition room. A duct for communication projecting upwards is provided, a guide member extending rearward from a position directly below the intake port is provided in the partition chamber, and a space through which air passes forward is provided below the guide member. An opening for drainage is formed at the front end portion of the bottom of the chamber, and by inverting the air flow from the intake port forward at the rear of the partition chamber, the separation of water from the air is promoted and the air flow is increased. To the upper opening of the duct, take in the air separated from the water into the inside of the hull through the duct, and further drain the separated water from the opening for drainage along the bottom of the partition chamber to the outside of the hull. An air intake system for small planing boats. 2. The small gliding according to claim 1, wherein an air passage extending from the intake port to the upper end opening of the duct is formed by a float of a resin foam filled in the partition chamber. Boat air intake device.