JPH0755199Y2 - Fuel supply system for small planing boats - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a fuel supply system for a small planing boat that is mounted on a deck and grips a steering wheel to travel.

[Prior Art] Generally, a hull of a small planing boat of this type is formed by a hollow shell formed by joining a plastic molded deck (including FRP) and a hull, and an engine mounted inside the hull propels the rear part of the ship bottom. It is configured to drive the machine and operate the steering means with the handle on the deck.

As the propulsion device, a propeller or a jet pump is used, and in the case of a jet pump, steering is performed by changing the direction of the injection nozzle to the left or right, and when the direction of the injection nozzle is changed to the up and down, it glides. You can also adjust the angle of attack.

For this type of small planing boat, there are a standing type on a flat floor deck, a type that straddles a vertical saddle type seat, a type that gets into the cockpit formed by denting the deck top surface, and , There are various types such as a type in which a bench seat is provided in the middle part in the front-back direction of the deck.

The fuel tank is mounted inside a hollow hull, and a fuel pump is used for the engine to supply the fuel sucked up from the fuel tank through a filter.

Refueling of the fuel tank is generally performed through a duct or the like from a fueling port provided on the deck surface.

The prior art documents showing such a structure include Japanese Utility Model Laid-Open No. 60-973.
There is number 67.

Furthermore, in the middle of the fuel supply path from the fuel tank to the fuel pump (or engine), when the engine or the fuel pump is stopped, the siphon phenomenon is invalidated and the fuel flow is immediately cut off for an anti-siphon. Check valve is provided.

[Technical issues to be solved by the device]

However, in the conventional fuel supply device for a small planing boat,
Since the fuel inlet of the fuel tank, the fuel suction pipe and the filter extending into the fuel tank, and the check valve for the anti-siphon were respectively attached at different positions, the structure of the fuel supply device is complicated, It took time to disassemble and assemble in the narrow hull.

The present invention has been made in view of such conventional technical problems, and can reduce the number of parts such as a fuel tank and simplify the structure, and improve workability during assembly and disassembly. An object of the present invention is to provide a fuel supply device for a small planing boat that can achieve cost reduction.

[Means for solving problems]

The present invention relates to a fuel supply device for a small planing boat having a fuel tank and an engine mounted inside a hull in which a deck and a hull are joined, and a fuel filler member is fixed to a top surface of the fuel tank. An oil supply passage and a fuel take-out passage formed of through passages leading to the inside of the fuel tank are formed in parallel, and an oil supply pipe connecting to an oil supply port for supplying fuel from outside the hull is connected to an inlet end of the oil supply passage. A fuel suction pipe extending to near the bottom of the fuel tank is attached to the inlet end of the fuel discharge passage, a filter is attached to the inlet end of the fuel suction pipe, and a check valve is attached to the outlet end of the fuel discharge passage. The check valve for the anti-siphon of the valve structure is fixed, and the fuel that leads to the engine is connected to the joint forming the outlet end of the check valve. A fuel supply pipe is connected, a fuel pump for sucking up the fuel in the fuel tank and supplying it to the engine is connected in the middle of the fuel supply pipe, and the check valve is configured to take out the fuel during operation of the fuel pump. By opening the passage and closing the fuel take-out passage when the fuel pump is stopped, each component around the fuel tank constituting the fuel supply device
It can be integrated into one refueling member and can be handled as one assembly, thereby facilitating disassembly and assembly work inside a narrow hull, reducing the number of parts, compact structure and A fuel supply device for a small planing boat capable of reducing the number of assembling steps.

〔Example〕

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

FIG. 4 is a vertical sectional view of a small planing boat equipped with a fuel supply device according to the present invention, FIG. 5 is a perspective view of the small planing boat of FIG. 4, and FIG. 6 is a small planing of FIG. It is a top view of a boat.

In these drawings, a hull 1 has a structure in which a deck 2 and a hull 3 are joined together at a mating surface 4 and integrated, and a bench seat 5 for seating an occupant is provided at an intermediate portion in the front-rear direction of the deck 2. And a cockpit 7 composed of a floor 6 is constructed.

The bench seat 5 is provided with a backrest 17.

A handle post 8 projecting above the cockpit 7 is detachably provided at a portion of the deck 2 in front of the cockpit 7 (close to the bow).

The deck 2 and the hull 3 are made of, for example, plastic (including FRP) molded products.

The front portion of the deck 2 has a streamlined shape and swells from the bow, and a fuel tank 9 (FIG. 4) is housed inside the deck 2.

An engine 10 is mounted inside the hull of the deck 2 on the lower side of the bench seat 5, and the engine 10 is configured to drive a propeller 12 at the rear of the bottom via a propeller shaft 11.

The interior of the hollow shell hull 1 is partitioned into front and rear by a bulkhead 21 that traverses the hull 1, and the latter half is the engine.
Engine room 22 that houses 10 and the propulsion unit 12, etc.
It has become.

As the propulsion unit 12, a jet pump is used which obtains propulsion force by injecting water sucked from the bottom opening 13 rearward.

The bench seat 5 with a backrest is usually wide enough for two people to sit side by side.

The bench seat 5 is configured by attaching a cushion made of foam resin to a seat frame (not shown) and covering the cushion with a skin, and the seat frame is fixed to the deck 2 by bolts or the like.

A rotary handle 15 protruding into the cockpit 7 is rotatably supported by the handle post 8, and by operating the rotary handle 15, the injection nozzle (not shown) of the propulsion machine 12 is fed via a control cable 16. ) Is changed to the left and right to perform steering.

The driver can operate in the same posture as an automobile or an aircraft by sitting on the bench seat 5 and gripping the rotating handle 15.

On both sides of the bench seat 5 of the deck 2, there are armrests 19, 19 (sixth part) for enhancing the comfort of passengers.
Figure) has been formed.

Further, the gun flannel portions on both sides of the floor 6 of the cockpit 7 are lowered to a position approaching the floor 6, and the lowered port side notches 20 and 20 (FIG. 6) form entrances and exits for getting on and off. ing.

As the rotating handle 15, a round handle or a bar handle can be freely used in addition to the concave-shaped handle as shown in the drawing.

At the front of the deck 2, a fuel tank 9 (fourth
An injection port 23 is provided for replenishing the drawing).

Further, the front end surface 24 of the handle post 8 is a dashboard provided with a tachometer for displaying the engine speed, a fuel meter for displaying the remaining amount of fuel, or a main switch.

The handle post 8 has a structure that can be separated from the deck 2 while the rotary handle 15 is still pivotally supported, and the line 29 in FIG. 5 and FIG. 6 indicates the line from the deck 2 of the handle post 8. Shows the dividing line of.

As shown in FIG. 4, the handle post 15 includes a handle bracket 31 and a handle frame connected to the handle bracket 31.
32 has a structure in which a hollow plastic body is attached.

The structure for attaching the handle post 15 to the deck 2 is
A backing plate 34 is applied to the back surface of the front upper surface 33 of the deck 2, and the front upper surface is provided between the handle bracket 31 and the backing plate 34.
33 is sandwiched, and these are fastened by fastening them with bolts, nuts, etc.

On the inner surface of the hull 3, as shown in FIGS. 1 and 4, two reinforcing hat garters 2 extending in the front-rear direction are provided.
5 and 26 are provided, and a tank mount 27 for holding the fuel tank 9 while protecting it is fixed to the upper surfaces of the hat garters 25 and 26 by fastening means such as bolts and nuts.

The fuel supply device is configured to replenish the fuel into the fuel tank 9 from the inlet 23 and to supply the fuel in the fuel tank 9 to the engine 10 by the fuel pump 28.

FIG. 1 is a sectional view showing a fuel supply device according to an embodiment of the present invention.

In FIG. 1, the tank mount 27 is fixed on the hat garters 25 and 26 provided on the inner surface of the bottom of the hull 3, and the fuel tank 9 is mounted in the tank mount 27.

This fuel tank 9 can be made by plastic (including FRP) molding, and an oil supply port 41 is provided on the top surface thereof.

The fuel supply port 41 and the injection port 23 are connected by a flexible pipe 42, and fuel can be replenished from the outside of the hull 1.

The fuel 43 in the fuel tank 9 is supplied to the engine 10 by the fuel pump 28 through the fuel suction pipe 44 and the fuel supply pipe 45.

The inlet end of the fuel suction pipe 44 extends to near the bottom surface of the fuel tank 9, and a filter 46 is attached to the inlet end.

The fuel sucked up through the fuel suction pipe 44 is sent to the engine 10 through an anti-siphon check valve 47.

The check valve 47 for the anti-siphon invalidates the siphon phenomenon and immediately shuts off the fuel flow when the engine 10 or the fuel pump 28 stops.
While the pump suction force is working, it opens to let the fuel flow,
It functions to block the passage when the pump suction force is exhausted.

FIG. 2 is a vertical sectional view of the fuel filler port 41, and FIG.
It is the bottom view seen from the line III-III of the filler opening of the figure.

1 to 3, the fuel supply system for a small planing boat according to the present invention is a small planing boat in which a fuel tank 9 and an engine 10 are mounted inside a hull 1 composed of a hollow shell in which a deck 2 and a hull 3 are joined. In a boat, a fuel suction pipe 44 extending into the fuel tank 9 is supplied to a fuel filler port 41 provided on the top surface of the fuel tank 9, and fuel from the fuel suction pipe 44 is supplied to a fuel via a check valve 47 for an anti-siphon. A joint portion connected to the pump 28 side and a filter 46 attached to the tip of the fuel suction pipe 44 are assembled and integrated.

The oil supply port 41 is made of, for example, metal casting such as aluminum die casting, or hard plastic molding.

In addition to the main passage 48, the fuel inlet 28 has a fuel pump 28
A passage 49 is formed through which the fuel sucked up by the fuel flows out to the engine 10.

The fuel suction pipe 44 is connected to the inlet side of the passage 49, and the check valve 47 is connected to the outlet side of the passage 49.
The fuel supply pipe 45 is connected via.

The fuel suction pipe 44 extends to the vicinity of the bottom surface of the fuel tank 9, and its opening is covered with the filter 46.

The check valve 47 is fixed to the outlet side of the passage 49 by press fitting or the like, and a joint portion 50 for connecting the fuel supply pipe 45 is formed at the tip of the check valve 47.

The fuel pump 28 is driven when the engine 10 rotates to supply the fuel 43 in the fuel tank 9 to the engine 10.

As shown in FIG. 2, the check valve 47 for the anti-siphon includes a valve body 53 that is pressed against a seat surface 52 by a predetermined pressing force by a spring 51 to seal and shut off, and the joint portion 50 having a through passage. I have it.

The operation is as follows.

That is, when the engine 10 is stopped, the valve body 53 is pressed against the seat surface 52 by the spring force of the spring 51, and the fuel passage is blocked.

On the other hand, when the fuel pump 28 is driven by the rotation of the engine 10 and a pump suction force of a set value or more acts, the valve body 53 separates from the seat surface 52 and opens, and the passage formed in the valve body 53. Then, the fuel is allowed to flow through the through passage of the joint portion 50.

Therefore, if the engine 10 is stopped by a kill switch or the like, the check valve 47 is automatically shut off to invalidate the siphon phenomenon, and the fuel flow is shut off immediately.

According to the embodiment described above, the fuel suction pipe 44 extending into the fuel tank 9, the filter 46 attached to the fuel suction pipe 44, the joint portion 50 connecting the fuel supply pipe 45, and the fuel supply pipe 45. Since various parts around the fuel tank 9 including the check valve 47 for the anti-siphon provided on the fuel tank 9 are integrally assembled to the fuel filler port 41 provided on the top surface of the fuel tank 9, the number of parts of the fuel system is increased. Can be reduced and the structure can be made compact, and the hull 1 is narrow when disassembling and assembling.
A fuel supply device for a small planing boat capable of improving workability and reducing cost by eliminating internal work has been provided.

Further, since the fuel suction pipe 44 extending into the fuel tank 9 and the fuel passage 49 for guiding the fuel from the fuel suction pipe to the engine side are formed in the fuel filler port 41, the fuel filler port 41 and the fuel The effect of facilitating support of the supply pipe 45 and the like is also obtained.

[Effect of device]

As is clear from the above description, according to the present invention, in a fuel supply device for a small planing boat in which a fuel tank and an engine are mounted inside a hull in which a deck and a hull are joined, a fuel filler member is provided on the top surface of the fuel tank. And a fuel take-out passage formed of a through passage leading to the inside of the fuel tank is formed in parallel in the fuel feed port member, and an inlet end of the fuel feed passage is provided for refueling from outside the hull. A fuel supply pipe connecting to the fuel injection port is connected, a fuel suction pipe extending to near the bottom surface in the fuel tank is attached to the inlet end of the fuel takeout passage, and a filter is attached to the inlet end of the fuel suction pipe. A check valve for an anti-siphon having a check valve structure is fixed to the outlet end of the fuel removal passage to form the outlet end of the check valve. A fuel supply pipe leading to the engine is connected to the joint portion, a fuel pump for sucking up the fuel in the fuel tank and supplying the fuel to the engine is connected to the fuel supply pipe, and the check valve is connected to the fuel. Since the fuel take-out passage is opened during the operation of the pump and the fuel take-out passage is closed when the fuel pump is stopped, each component around the fuel tank constituting the fuel supply device is concentrated on one refueling member. They can be integrated and handled as one assembly, which facilitates disassembly and assembly work inside a narrow hull, and reduces the number of parts, the structure, and the assembly man-hours. Provided is a fuel supply device for a small planing boat that can be designed.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view of a fuel supply device for a small planing boat according to an embodiment of the present invention, FIG. 2 is a vertical cross-sectional view of a fuel filler port in FIG. 1, and FIG. 3 is a line in FIG. Bottom view seen from III-III,
4 is a schematic vertical sectional view of a small planing boat equipped with the fuel supply system of FIG. 1, and FIG. 5 is a perspective view of the small planing boat of FIG.
FIG. 6 is a plan view of the small planing boat of FIG. 1 ... Hull, 2 ... Deck, 3 ... Hull, 7 ... Cockpit, 9 ... Fuel tank, 10 ... Engine, 23 ... Injection port, 28 ... Fuel pump, 41 ... Refueling port, 43 ……fuel,
44 …… Fuel suction pipe, 45 …… Fuel supply pipe, 46
...... Filter, 47 ...... Check valve, 50 ...... Joint part.

Claims (1)

[Scope of utility model registration request] 1. A fuel supply device for a small planing boat in which a fuel tank and an engine are mounted inside a hull in which a deck and a hull are joined, and a fuel filler member (41) is fixed to the top surface of the fuel tank (9). The fuel filler port member (41) is provided with a fuel filler passage (48) and a fuel take-out passage (49) formed in parallel to each other, the fuel filler passage (48) communicating with the inside of the fuel tank (9) being formed in parallel. A fuel filler pipe (42) connecting to a fuel filler port (23) for refueling from the outside of the hull is connected to the end, and a fuel extending to the vicinity of the bottom surface in the fuel tank is connected to the inlet end of the fuel take-out passage (49). A suction pipe (44) is attached, a filter (46) is attached to an inlet end of the fuel suction pipe (44), and the fuel take-out passage (49) is provided.
A check valve (47) for an anti-siphon having a check valve structure is fixed to an outlet end of the engine, and a joint portion (50) forming an outlet end of the check valve (47) has an engine (1
0) is connected to a fuel supply pipe (45), and a fuel pump (for sucking up the fuel in the fuel tank (9) and supplying it to the engine (10) in the middle of the fuel supply pipe (45). 28) is connected, and the check valve (47) opens the fuel removal passage (49) during operation of the fuel pump (28) and closes the fuel removal passage (49) when the fuel pump (28) is stopped. A fuel supply device for a small planing boat characterized by the above.