JPH0625438Y2 - Fuel tank mounting structure for small planing boats - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention mainly relates to a mounting structure of a fuel tank used in a water jet propulsion type or screw propelling type small planing boat.

[Prior Art] This type of fuel tank mounting structure is disclosed, for example, in JP-A-60-15.
As described in Japanese Patent No. 7918, a cushion material is laid on the hull inside the hull, and the fuel tank is placed on the cushion material, and then fixed with a rubber band, or a part of the tank body is fixed. In addition to locking, the threaded portion of the fuel injection port is projected from the upper wall of the hull, and a nut is screwed to the threaded portion to fix it. Further, the fuel tank is not provided with a mechanism for bleeding air from the tank.

[Problems to be Solved by the Invention] In the above-described conventional fuel tank mounting structure, the fuel tank is simply placed on the cushion member and fixed, so that it is difficult to position the fuel tank, particularly when the fuel tank is fixed with a rubber band.
The fuel tank's fuel filler port is generally provided on the top wall of the tank (the highest position), but in small planing boats, the fuel tank is usually inserted by mounting it in a limited space inside the hull. If the fuel tank is made as large as possible, the fuel tank's fuel filler port may be provided only at a position lower than the upper end wall of the tank in relation to the insertion port or the shape of the hull.

In the case of the fuel tank as described above, air may be accumulated in the tank above the fuel filling port to create a space, and only a smaller amount than the volume in the tank may be refueled. In addition, even if such a tank is particularly likely to occur, even in the case of a fuel tank in which the fuel filler port is provided on the upper wall of the tank, the air in the tank does not smoothly escape from the fuel filler port during refueling, Blowback of fuel may occur.

The present invention has been made in view of the above-mentioned points, and the fuel tank mounted on a buoyant body that can be easily positioned when mounting the fuel tank, that can fix the fuel tank at a predetermined position, and that also functions as a cushioning material for the fuel tank. It is intended to provide a mounting structure for a tank. At the same time, it is also an object of the present invention to provide a fuel tank in which the fuel does not blow back during refueling, can be refueled smoothly, and can be filled with fuel without waste.

[Means for Solving the Problems] In order to achieve the above-mentioned first object, in the present invention, a recess corresponding to the bottom shape of the fuel tank is formed on the upper surface,
A non-water-absorbing buoyant body made of foamed synthetic resin and having a low specific gravity is positioned and fixed by the notches provided in the buoyant body in correspondence with a plurality of bosses projecting on the hull inside the hull. While the bottom of the fuel tank is fitted in the recess, a rubber band is stretched over the fuel tank to secure the fuel tank between the hooks provided at the upper ends of the bosses on the hull. And an opening into which the fuel tank can be inserted is opened, the fuel tank is inserted into the hull through the opening and fixed with the rubber band, and the opening is closed by a lid material that also serves as an article storage case. There is.

In order to achieve the above-mentioned second object, in the invention of claim 2, the fuel tank includes a fuel filler opening formed in a tank wall,
A fuel injection port arranged on the wall surface of the hull above it is connected by a fueling tube, an air vent port is opened in the upper end wall of the fuel tank, and the air vent port and the fuel injection port are connected by a bypass tube. is doing.

[Operation] According to the fuel tank mounting structure of the present invention, the tank is positioned by fitting the bottom portion of the fuel tank into the recess of the buoyancy body, and then the rubber band is simply hung on the hooking device. , The tank is fixed in place. Therefore, the fuel tank can be easily attached even if the fuel tank is inserted through the opening provided in a part of the hull wall, and the fuel tank can be easily removed through the opening. Moreover,
Since the fuel tank is fixed with a buoyant body with cushioning properties and an elastic rubber band, if a shock is applied to the hull, some movement of the fuel tank is allowed and the shock to the fuel tank is effective. Will be relaxed. In addition, the buoyant body can be easily fixed to the hull by the boss and the notch, which simplifies the production. Moreover, since the opening is closed by the lid material that also serves as the article storage case, the appearance is good and the article can be stored conveniently. In addition, when water or the like is flooded into the hull, the amount of flooded water corresponding to the volume of the buoyancy body is suppressed.

As described in claim 2, if the air vent port opened at the upper end of the fuel tank and the fuel inlet port provided on the upper wall of the hull are connected by a bypass tube, the air in the tank can be refueled. Smoothly escapes to the outside, so that refueling work can be performed smoothly and the tank can be filled with fuel even if the refueling port is located lower than the upper end wall of the tank.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, a small planing boat 1 has a structure in which a hull 2 forming the lower half of the hull and a deck 3 forming the upper half of the hull are integrally joined. In the stern of the hull 2,
A water jet propulsion device (not shown) and a steering nozzle (not shown) are provided. A central portion of the rear portion of the deck 3 is formed to project upward to form a seat portion 4, and a lower portion of the seat portion 4 is formed to an engine room (not shown) in which an engine (not shown) is provided. ) Is installed. On the other hand, the front portion of the deck 3 is inflated upward from the front end thereof to form a hood 5, and the rear end of the hood 5 is closed by an upright wall 6. The lower end of the upright wall 6 is connected to a bulkhead 7 arranged in the hull 2 below the upright wall 6.

Further, an opening 8 for inserting a fuel tank described later is formed in the central portion of the upright wall 6, and the opening 8 has an article storage case 9 as a lid fitted therein. The peripheral flange 9a is closed by abutting against the upstanding wall 6 at the peripheral edge of the opening 8. The article storage case 9 includes an opening / closing lid 9b. Further, the inside of the hood 5 is formed in a fuel tank 11 and a storage room 10 for equipment,
A fuel tank 11 and a digester 12 are installed therein via a buoyant body 15 described later. In addition, an opening 13 is opened slightly near the front of the hood 5, and a hatch cover 14 is provided in this opening 13.
However, it is attached so that it can be opened and closed as shown in the figure.

The buoyant body 15 has a constant thickness, has a substantially trapezoidal shape when viewed from above as shown in FIG. 2, and is made of a non-water-absorbing material having a low specific gravity, for example, foamed synthetic resin such as foamed polyurethane or foamed polyethylene. is doing. A recess 16 corresponding to the shape of the bottom of the fuel tank 11 and a recess 17 corresponding to the shape of the digester 12 are provided on the rear and front of the upper surface of the buoyancy body 15, as shown in FIGS. 1 and 2. Each is formed. Further, between the recesses 16 and 17 of the buoyancy body 15, there is formed a vertically elongated narrow hole 18 having a narrow width. Further, notches 15a and 15b are provided at both front and rear ends of the buoyant body 15 as shown in FIG.

Then, the buoyant body 15 is placed in the storage chamber 10 as shown in FIG.
Inside, it is fixed on the hull 2 with an adhesive, but a plurality of (here, six) bosses 20 are integrally provided at predetermined positions on the hull 2 and these bosses 20 are provided. Buoyant body 15
As shown in Fig. 2, the notch 15
The buoyancy body 15 is positioned by exposing all of the a, 15b and the long hole 18. The buoyant body
Sticking 15 onto hull 2 is usually done with hull 2 and deck 3 above.
Before joining.

Further, as shown in FIGS. 3 and 4, a fuel tank 11 (FIG. 1) and a digester 12 (FIG. 1) are provided on each boss 20.
Hook 21 for hanging the rubber bands 30 and 31 for fixing
Is attached with a set screw 22. Further, rectangular ring-shaped metal fittings 32 are attached to both ends of each of the rubber bands 30 and 31, and each metal fitting 32 is hooked on the bent end 21a of the hook 21. The bent ends 21a of the left and right hooks 21 exposed from the elongated hole 18 (Fig. 2) are normally closed with the metal fittings 32 as shown in Fig. 4 and the bent ends 21a are closed to fix the metal fittings 3
Keep 2 in place.

Thus, with one end of each of the rubber bands 30 and 31 attached to the common central hook 21, the fuel tank is inserted into the recess 16.
The bottom of 11 and the digestive organ 12 with its sideways placed in the recess 17 are inserted. Then, as shown in FIG. 1, rubber bands 30 and 31 are bridged from both sides on the fuel tank 11 and the digester 12, respectively, and the metal fitting 32 on the other end side is attached to the front and rear hooks 2.
The fuel tank 11 and the digester 12 are fixed by being hooked on (the bent end 21a thereof) 1.

In this embodiment, the fuel tank 11 is inserted into the storage chamber 10 through the opening 8 provided in the upright wall 6. Although there is an opening 13 on the hood 5 side,
The opening 13 is located at the position where the water is most likely to be splashed when the small planing boat 1 travels, and it is desirable to make the opening area small. Therefore, the opening 13 is not sized so that the fuel tank 11 can be inserted.

The fuel tank 11 inserted through the opening 8 is fixed by the rubber band 30 as described above, and then the article storage case (cover member) 9 is fitted into the opening 8 and closed.

By the way, the opening 8 for inserting the fuel tank 11
However, the shape of the fuel tank 11 is determined based on the size and shape of the opening 8. The fuel tank 11 shown in FIG. 5 is an embodiment of the fuel tank when the maximum height H is limited based on the opening 8. As shown in the figure, since the joint 43 of the refueling tube 42 projects upward from the refueling port 41, the tank 11
A part of the upper end wall 44 (right side in the figure) of the lower part is formed to be slightly lower, and the filler port 41 is opened in the lower wall 44a, and the joint 43
Is protruding. A filler 48, which serves as a fuel inlet and is arranged on the deck 3 above the fuel filler port 41, is connected to the joint 43 by a fuel filler tube 42.

Therefore, originally, the lower end of the fuel filler 41 and the upper end wall 44
Air accumulates in the portion of the head S, and that portion becomes a useless space where refueling cannot be performed. Therefore, an air vent 45 is provided in the upper end wall 44, a joint 46 of the bypass tube 47 is projected, and a bypass tube is also provided in the filler 48.
47 joints 49 are provided, and the joint 49 and the joint 46 are connected by a bypass tube 47.

Therefore, in the fuel tank 11 having the above structure, when the fuel is injected from the filler 48, the air in the tank 11 smoothly escapes to the outside from the air vent 45 through the bypass tube 47, so that the fuel can be injected smoothly. Done. Further, since the air is not accumulated in the tank 11, the fuel can be injected up to the vicinity of the upper end wall 44, and the inside of the tank 11 is effectively used.

[Advantages of the Invention] Since the fuel tank mounting structure of the present invention has the above-mentioned configuration, it has the following effects.

(1) By fitting the fuel tank into the recess of the buoyant body,
Since the tank is positioned, positioning is easy,
The fuel tank can be easily removed through the opening so that the fuel tank can be easily attached even if the fuel tank is inserted through the opening provided in the hull wall. Further, the tank is fixed by a rubber band from above the tank with the bottom part of the tank fitted in the recess of the buoyancy body, so that the fuel tank is fixed by the buoyancy body having cushioning property and the rubber band having elasticity. Therefore, even if an impact is applied to the hull, the impact on the fuel tank is effectively mitigated. Moreover, the buoyancy bodies can be arranged relatively evenly, and it is effective for increasing the volume of the buoyancy body, and when the water is flooded into the hull, the amount of water inundation corresponding to the volume of the buoyancy body is suppressed. In addition, the buoyant body can be easily fixed to the hull by the boss and the notch, which simplifies the production.

Further, since the fuel tank can be easily inserted into the hull through the opening, and the tank can be attached from the opening, the work efficiency is high, and the opening is closed by the lid material that also serves as the article storage case. So, in addition to good appearance,
It is convenient because it can store items.

(2) According to the mounting structure of claim 2, the fuel is not blown back during refueling, and the fuel can be refueled smoothly, and the fuel tank is filled with the fuel regardless of the position of the refueling port. it can.

[Brief description of drawings]

FIG. 1 is a right side view of a small planing boat with a fuel tank mounting structure according to the present invention, which is partially cut away, FIG. 2 is a view in the direction of arrow A in FIG. 1, and FIG. FIG. 4 is an enlarged side view, FIG. 4 is a plan view of FIG. 3, and FIG. 5 is a longitudinal sectional view showing an embodiment of the fuel tank. DESCRIPTION OF SYMBOLS 1 ... Small planing boat, 3 ... Deck, 5 ... Hood, 6 ... Elevating wall, 8 ... Opening part, 9 ... Article storage case (cover material), 10 ... Storage room, 11 ... Fuel tank, 15 ... Buoyant body, 15a, 15b) ... notch, 16 ... recess, 21 ... latch, 30 ... rubber band, 41 ... oil supply port, 42 ... oil supply tube, 45 ... air vent, 47 ... bypass tube, 48 ... filler ( Fuel inlet).

Claims (2)

[Scope of utility model registration request] 1. A plurality of non-water-absorbing buoyant bodies having a small specific gravity, which are made of foamed synthetic resin and have a recess corresponding to the shape of the bottom of a fuel tank, formed on the hull in the hull. The buoyant body is positioned and fixed by a notch corresponding to the boss, the bottom of the fuel tank is fitted in the recess, and a hook provided on the upper end of each boss on the hull. In between, a rubber band is hung from above the fuel tank to fix the fuel tank, an opening into which the fuel tank can be inserted is opened, and the fuel tank is inserted into the hull through the opening, A fuel tank mounting structure for a small planing boat, wherein the opening is closed by a rubber band and the opening is closed by a lid that also serves as an article storage case. 2. A fuel filler port provided on the wall of the fuel tank and a fuel inlet port provided on the wall surface of the hull above the fuel tank are connected by a filler tube, and an air vent port is provided on the upper end wall of the fuel tank. The fuel tank mounting structure for a small gliding boat according to claim 1, wherein the air vent and the fuel inlet are connected by a bypass tube.