JP3345153B2 - Liquid tank overflow prevention structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid tank such as an oil tank or a fuel tank, and more particularly to a structure for preventing overflow from an inlet in such a liquid tank.

[0002]

2. Description of the Related Art Conventionally, for an oil tank or a fuel tank used in a general vehicle or a small boat, a cylindrical injection port is provided above a main body portion which serves as an oil or fuel storage portion. The upper end of the inlet is sealed by a cap. The cap is removed and oil or fuel is injected from the inlet while the liquid level in the inlet is monitored. It is common practice to fill the tank with oil or fuel by stopping the injection.

[0003] In such oil tanks and fuel tanks, a filter component may be arranged at an inlet to remove foreign matter mixed in oil or fuel to be injected. As a filter part, a flange-shaped member is attached to the periphery of the inlet of the bag-shaped filter, and by fitting the outer periphery of the flange-shaped member to the inner wall of the inlet, the filter part is detachably attached to the inlet. The one that is attached to is generally used.

[0004]

[SUMMARY OF THE INVENTION Incidentally, in the liquid tank, such as the conventional oil tank and the fuel tank as described above, the filter part is attached to the inlet
If the injection speed of the liquid is high or the viscosity of the liquid is high, the air in the tank cannot escape through the filter to the outside than the filter, so that the injected liquid can smoothly filter the filter. The liquid may not pass through , and the liquid may overflow from the inlet.

An object of the present invention is to solve the above-mentioned disadvantages of the conventional liquid tank. More specifically, the present invention relates to a case where a filter component is attached to an inlet.
, The injected liquid is to pass through the filter smoothly, it injected liquid is intended to provide an overflow preventing structure of a liquid tank which can be prevented from overflowing from the inlet.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems and to achieve the object, the present invention provides a liquid tank in which a cylindrical inlet is formed above a liquid container.
Place the filter component, which has a collar member around the inlet of the bag-shaped filter, under the outer periphery of the collar member below the inlet.
By fitting it to the inner wall of the part, it is detachably attached to the lower part in the inlet, and a ventilation pipe communicating between the upper and lower sides of the flange-shaped member is extended so that its upper end extends to near the opening of the inlet. It is characterized by being formed integrally with the shaped member.

[0007]

[Operation] With the above-mentioned configuration in which the filter parts are attached, the injected liquid is filtered in the lower part of the inlet.
Air below the filter as it passes through the
Is through the vent tube upper end extends to the opening near the inlet
And the liquid can escape above the inlet, allowing the injected liquid to pass smoothly through the filter without being disturbed by the air flowing out of the tank, preventing the liquid from overflowing due to clogging in the filter be able to.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of a liquid tank overflow prevention structure according to the present invention.

FIG. 1 shows an oil tank provided with an overflow prevention structure according to the present invention. An oil tank 10 is provided with a projection 12 having a buffer member 11 attached to a bottom wall thereof. A communication passage 17 extending from the lower part of the side wall to the sub oil tank extends, and on the upper surface thereof, an oil supply part 13 and a valve 14 are arranged, and an injection port 15 for injecting oil into the tank is provided. ing.

An injection port 15 of the oil tank 10 extends upward from the upper surface of the oil tank 1 by an appropriate length, and has an upper end sealed by a removable cap 16 and is basically a cylinder. In the middle of the side wall portion, an enlarged portion 15a which bulges largely to the side is formed.

An inlet 15 of the oil tank 10 has
The filter component 20 is inserted from the opening above it,
An engaging projection 22b formed on the filter component 20 and an engaging recess 15b formed on the lower inner surface of the inlet 15
Is fitted, the filter component 20 is detachably attached to the lower part in the inlet 15.

FIGS. 2 to 4 show a filter component 20 mounted in the inlet 15 of the oil tank 10. A filter 21 formed in a bag shape has a central portion surrounding the inlet. A ring-shaped collar member 22 having an opening 22a serving as an inlet of the filter 21 is formed on the outer peripheral wall of the collar member 22. An engaging projection 22b for fitting with the mating recess 15b is integrally formed.

Further, the filter component 20 has a ventilation pipe 23 which communicates between the upper and lower portions of the flange-shaped member 22 when the filter component 20 is mounted in the injection port 15, and penetrates the flange-shaped member 22 itself vertically. Are formed integrally with the collar member 22 so that the upper end thereof extends to the vicinity of the opening of the injection port 5.

The oil tank 10 of the present embodiment having the inlet 15 provided with the filter component 20 as described above is used as an oil tank of a small boat called a jet propulsion boat equipped with a jet propulsion device by water injection. A jet propulsion boat provided with such an oil tank 10 will be described below.

FIG. 5 schematically shows a jet propulsion boat. In the jet propulsion boat 1, a steering wheel 4 is disposed on a hatch cover 3 near the center outside the hull, and a seat 5 is provided behind the steering wheel 4. A fuel tank 6 and an oil tank 10 are mounted at the front of the hull, an engine 7 is mounted near the center of the hull, and a jet propulsion device 8 is mounted at the bottom of the hull. A storage unit 9 for storing food and drink and other necessary items is provided below the sheet 5.
Is provided.

In this jet propulsion boat 1, the impeller 82 in the flow path 81 is rotated by the engine 7 to introduce water from a water inlet 83 opened at the bottom of the boat, and a water outlet 8 at the stern is provided.
Propelling force is generated by jetting water backward from the steering wheel 4. By operating the steering handle 4, the water jet port 84 can be swung horizontally by swinging, and the steering wheel can be steered. By rotating the grip of the handle 4, as shown in FIG.
4 can be swung up and down to adjust the trim.

FIG. 7 shows an operation transmission structure from the steering handle 4 to the water jet port 84 in the jet propulsion boat 1. The operation transmission structure is attached at the front end of the hull opening 31 so as to be freely opened and closed by a hinge, On the back surface of the hatch cover 3 whose opening state is fixed, a steering shaft 33 rotated by the operation of the steering handle 4 and a pair of rotations pulled in different directions by the rotation of the grip portion of the steering handle 4 The plate operation cables 35 are respectively guided, and the rotation of the steering shaft 33 causes
The steering cable 34 for swinging the rotating plate 37 in the horizontal direction is operated, and the rotating plate 37 is rotated by pulling the rotating plate operation cables 35 in directions different from each other. The trim adjustment cable 38 for swinging the outlet 84 up and down is operated.

FIG. 8 shows a disassembled state of the grip portion of the steering handle 4. The handle main body 41 has a pivot plate operating cable attachment portion 42 formed at an end thereof, and a grip portion 43 in front thereof. The pawl member 45 is rotatably attached to the handle main body 41 in a state of being urged by a spring 44, and the cable attaching portion 42 of the handle main body 41 is
The upper cover member 46 and the lower cover member 47 cover the movable portion inside thereof, and the grip portion 42 of the handle main body 41 is covered by a grip member 48 made of rubber or the like so as to be integrally adhered thereto. is there.

The cable attaching portion 42 of the handle body 41
Are the end portions 3 of the pair of rotating plate operation cables 35.
The claw members 45 of the handle body 41 are formed on the upper cover member 46 when the cable attachment portion 42 is covered by the upper cover member 46 and the lower cover member 47. It is engaged with a groove 49 provided with notches at regular intervals.

As shown in FIG. 9, the upper cover member 46 and the lower cover member 47 are fixed to the steering bar 51 by bolts 50, so that the grip portion of the steering handle 4 is covered by the grip member 48. The handle body 41 that has been removed is
The upper cover member 46 and the lower cover member 47 rotatably hold the steering bar 51.

The grip of the steering wheel 4 as described above is
After pushing the claw member 45 of the handle main body 41 with a finger against the urging force of the spring 44 to release the engagement with one notch of the groove 49 formed in the upper cover member 46, the grip member 48 is released. By grasping and rotating the handle body 41 to an appropriate position, releasing the finger from the claw member 45 and engaging the claw member 45 with another notch of the groove 49 by the urging force of the spring 44, the handle body 41 The rotation position of the cable attachment portion 42 at the end of the cable is changed and positioned, and the rotation plate operation cable 35 is operated.

FIGS. 10 and 11 show the mounting state of the fuel tank 6 mounted on the front part of the hull.
A recess 61 for mounting the oil tank 10 is formed in a part of the upper surface of the fuel tank 6. The recess 61 has an oil tank for preventing the oil tank 10 from moving. A protrusion 62 on the bottom wall of the fuel cell 10 and a concave portion 62 into which the cushioning member 11 attached thereto are fitted are formed, and the bottom wall of the fuel tank 6 prevents movement of the fuel tank 10 with respect to the hull. For this purpose, a recess 63 is formed at an appropriate position for fitting a buffer member 101 bolted to a projection 100 projecting from the fuel tank mounting portion of the hull.

The fuel tank 6 has a hull formed by a band 64 together with the oil tank 10 in a state where the recess 63 on the fuel tank side and the buffer member 101 fixed to the projection 100 on the hull side are fitted. A rib 65 is formed at an appropriate position on the surface of the fuel tank 6 so that the band 64 wrapped around the fuel tank 6 does not shift.

A band 64 for fixing the fuel tank 6
As shown in FIG. 12A, a stretchable band member 6b made of an elastic material such as rubber is attached to a part of a side of a durable cloth band body 6a having no stretch. In the no-load state, FIG.
The state shown in FIG. 12B is obtained, and the state shown in FIG. 12C is obtained in the load state.
By fixing the fuel tank 6 with such a band 64, usually, the fuel tank 6 is firmly tightened and fixed by the elastic contraction force of the elastic band member 6b, and the hull sways and the fuel tank 6 is fixed. Upset band 6
When a sudden load is applied to the band 4, the stretchable band member 6b expands to absorb the load, so that the band body 6a does not break. Since the elastic band member 6b does not extend completely, the elastic band member 6b does not extend and cut.

FIG. 13 shows the storage section 9 provided below the seat 5 at the rear of the hull. The storage section 9 disposed below the seat and behind the battery 71 has a plug at the bottom. Are formed, and a heat insulating material 92 is attached so as to cover the entire outer surface excluding the drain hole 91 part.

Therefore, normally, an exhaust pipe 72 extending backward from the engine 7 is provided in the hull below the seat 5 of the jet propulsion boat 1, and the storage portion 9 is located near the exhaust pipe 72. However, the storage portion 9 is made of a heat insulating material 92.
As a result, the influence of the heat of the exhaust pipe 72 on the food and drink stored therein is reduced.

The structure for preventing the overflow of the liquid tank according to the present embodiment applied to the oil tank 10 installed in the jet propulsion watercraft 1 having the above-described configuration has a cylindrical injection port 15. When a large space is formed by the enlarged portion 15a in the middle of the oil tank 10, when the injected liquid is filled in the oil tank 10 and then rises in the inlet 15, the rising speed of the liquid level is increased. The injection is delayed at the point 15a, the injection can be stopped with a margin after checking the liquid level, and the liquid can be prevented from overflowing.

The filter member 20 has a flange 22
Is formed integrally, the air below the flanged member 22 can inject upward through the ventilation pipe 23 when the liquid is injected. Oil tank 1 that comes out in place of liquid
The liquid in the filter 21 does not become clogged with the air inside 0, and the overflow of the liquid due to the clogging of the filter is prevented.

Although the structure for preventing the overflow of the liquid tank of the present invention has been described above with reference to the embodiment of the oil tank 10 installed in the jet propulsion boat 1, the present invention is limited to only such specific applications. However, it is needless to say that the present invention can be widely applied to the general inlet of a liquid tank.

[0030]

According to the structure for preventing overflow of a liquid tank of the present invention as described above, the injected liquid
Filter passes through the filter at the bottom of the inlet.
Air below the air inlet and through the vent
By escaping, the injected liquid escapes from the tank
Smoothly pass through the filter without disturbing the air
The injected liquid is clogged in the filter section.
To prevent overflow from the inlet
Can be.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of a liquid tank overflow prevention structure according to the present invention.

FIG. 2 is a side view showing the filter component in the embodiment shown in FIG.

FIG. 3 is a sectional view taken along the line AA of FIG. 2;

4A is a top view of the filter component shown in FIG. 2, and FIG. 4B is a bottom view thereof.

FIG. 5 is an explanatory view schematically showing a jet propulsion boat in which the oil tank of the embodiment shown in FIG. 1 is installed.

FIG. 6 is an explanatory view showing a trim adjustment state of the jet propulsion boat shown in FIG. 5;

7 is a perspective view showing an operation transmission structure from a steering handle on the back surface of a hatch cover of the jet propulsion boat shown in FIG. 5;

8 is an exploded perspective view showing a grip portion of a steering handle of the jet propulsion boat shown in FIG. 5;

FIG. 9 is a partial cross-sectional view showing a grip portion of a steering handle of the jet propulsion boat shown in FIG. 5;

FIG. 10 is a side view showing a fixed state of a fuel tank mounted on the jet propulsion boat shown in FIG. 5;

11 is a top view showing a fixed state of a fuel tank mounted on the jet propulsion boat shown in FIG.

12A is a top view showing the band itself for fixing the fuel tank shown in FIG. 10, FIG. 12B is a partial side view in a no-load state, and FIG. 12C is a partial side view in a loaded state. .

FIG. 13 is a sectional view showing the vicinity of a storage unit installed in the jet propulsion boat shown in FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Liquid tank 15 Injection port 15a Enlarged part 20 Filter part 21 Filter 22 Flange member 23 Vent pipe

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-52-5183 (JP, A) JP-A-52-18694 (JP, A) Fully open 1987-497 (JP, U) Really open 1986 171635 (JP, U) Japanese Utility Model 60-179527 (JP, U) Japanese Utility Model 62-4428 (JP, U) Japanese Utility Model 1-152828 (JP, U) Japanese Utility Model 2-65620 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) B63B 11/04 B60K 15/00-15/04 B65D 25/38 B65D 5/32

Claims (1)

(57) [Claims] In a liquid tank in which a cylindrical inlet is formed above a liquid container, a filter component provided with a flange member around an inlet of a bag-shaped filter is a flange member. The outer peripheral portion of the air inlet is detachably attached to the lower portion of the inlet by fitting the outer peripheral portion to the inner wall of the lower portion of the inlet. An overflow prevention structure for a liquid tank, wherein the structure is formed integrally with a flange-shaped member so as to extend to the vicinity of the opening.