JPH07215269A - Overflow preventive structure of tank for liquid - Google Patents

Abstract

PURPOSE:To prevent an overflow of the poured liquid from an inlet, in a tank for liquid. CONSTITUTION:In a tank 10 for liquid in which a tubular inlet 15 is formed at the upper side of a liquid housing, an expansion part 15a to swell largely the side wall of the inlet 15 is formed, or a filter part 20 in which a flange form member 22 is attached to the periphery of the inlet of a bag form filter 21 is installed allowable to insert and remove to the lower side in the inlet 15 by fitting the outer periphery of the flange form member 22 to the inner wall of the inlet 15. And at the same time, a ventilating pipe 23 allowing the upper side to communicate with the lower side of the flange form member 22 is formed integrally by extending its upper end to near the opening of the inlet 15.

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 an overflow from an inlet in such a liquid tank.

[0002]

2. Description of the Related Art Conventionally, for an oil tank and a fuel tank used in general vehicles and small boats, a cylindrical inlet is provided above a main body which is a storage portion for oil and fuel. Is integrally formed, and the upper end of this inlet is sealed with a cap.While injecting oil or fuel from the inlet with the cap removed, the liquid level inside the inlet is checked. It is a common practice to fill the tank with oil or fuel by stopping the injection.

Further, in such an oil tank or a fuel tank, a filter part may be arranged at the inlet to remove foreign matter from the oil or fuel to be injected, in order to remove the foreign matter. As a filter component, a collar-shaped member is attached around the inlet of a bag-shaped filter, and the outer peripheral portion of this collar-shaped member is fitted to the inner wall of the inlet to allow the filter component to be attached to and detached from the inlet. The ones that are attached to are commonly used.

[0004]

By the way, in the liquid tank such as the conventional oil tank or fuel tank as described above, if the injection speed of oil or fuel into the tank is high, the liquid will be stored in the storage portion. When the rising speed of the liquid level rising in the inlet after the liquid is full and the container in your hand is heavy or the response is delayed, the liquid overflows from the inlet in no time. I may end up doing it.

Further, in the case where a filter part is attached to the inlet, when the liquid injection speed is high or the liquid viscosity is high, the air in the tank passes through the filter to the outside rather than the filter. The liquid cannot be escaped, so that the injected liquid cannot smoothly pass through the filter, and again, the liquid may overflow from the injection port.

An object of the present invention is to eliminate the inconveniences of the conventional liquid tank as described above, and more specifically, the liquid that rises in the inlet after the container is filled with the liquid. Slow down the ascent of the surface, or
It is an object of the present invention to provide an overflow prevention structure for a liquid tank that allows an injected liquid to pass through a filter smoothly and prevent the injected liquid from overflowing from an injection port.

[0007]

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 containing portion,
In the middle of the cylindrical inlet, an enlarged portion is formed in which the side wall of the inlet is largely bulged laterally.

Further, according to the present invention, in a liquid tank in which a cylindrical inlet is formed above a liquid containing portion, a filter component in which a collar-shaped member is attached to a peripheral portion of an inlet of a bag-shaped filter is provided. By fitting the outer peripheral portion of the collar-shaped member to the inner wall of the inlet, it is detachably attached to the lower portion inside the inlet, and the ventilation pipe that communicates the upper side and the lower side of the collar-shaped member with the upper end of the inlet is It is characterized in that it is formed integrally with the collar-shaped member so as to extend to the vicinity of the opening.

[0009]

[Operation] Due to the above-mentioned configuration in which an enlarged portion that greatly expands is formed in the middle of the injection port, when the injected liquid rises in the injection port after it has filled the storage part, Since the ascending speed slows down at the expanded part where the bulge is expanded, it is possible to stop the injection with a margin during that time.
It is possible to prevent the liquid from overflowing due to the rapid rise in the liquid level.

Further, with the construction in which the above-mentioned filter component is attached, the air below the filter component can escape to the upper side of the inlet through the ventilation pipe, so that the injected liquid is discharged from the tank. It can pass through the filter smoothly without being obstructed by the air that escapes, and prevents the liquid from overflowing due to clogging of the filter.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a liquid tank overflow prevention structure of the present invention will be described below with reference to the drawings.

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

The inlet 15 of the oil tank 10 extends upward from the upper surface of the oil tank 1 by an appropriate length, and its upper end is closed by a removable cap 16, which is basically a cylinder. In the middle of the side wall portion of the shape, an enlarged portion 15a that largely bulges laterally is formed.

At the inlet 15 of the oil tank 10,
The filter component 20 is inserted through the opening above it,
Engagement protrusions 22b formed on the filter component 20 and engagement recesses 15b formed on the lower inner surface of the injection port 15
By fitting and, the filter component 20 is detachably attached to the lower part in the inlet 15.

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

Further, in this filter part 20, a ventilation pipe 23, which communicates between the upper part and the lower part of the collar-shaped member 22 when the filter part 20 is mounted in the inlet 15, vertically penetrates the collar-shaped member 22 itself. The upper end is formed integrally with the collar-shaped member 22 so as to extend 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 above-described filter component 20 is used as an oil tank of a small boat called a jet propulsion boat equipped with a jet propulsion machine by water injection. A jet propulsion boat equipped with such an oil tank 10 will be described below.

FIG. 5 shows an outline of a jet propulsion boat. In the jet propulsion boat 1, a steering handle 4 is arranged on a hatch cover 3 near the center outside the hull, and a seat 5 is provided behind it. The fuel tank 6 and the oil tank 10 are installed in the front part of the hull, the engine 7 is installed near the center of the hull, and the jet propulsion device 8 is installed in the bottom part of the rear part of the hull. Below the seat 5, there is a storage section 9 for storing food and drink and other necessary items.
Is provided.

In this jet propulsion watercraft 1, the engine 7 rotates the impeller 82 in the flow path 81 to introduce water from the water introduction port 83 opened at the bottom of the ship, and the water ejection port 8 at the stern.
Propulsive force is generated by ejecting water rearward from No. 4, and by operating the steering handle 4, the water ejection port 84 can be horizontally swung and turned, and steering can be performed. By rotating the grip of the handle 4, as shown in FIG.
4 can be swung in the vertical direction to adjust the trim.

FIG. 7 shows a structure for transmitting an operation from the steering handle 4 to the water jet outlet 84 in the jet propulsion boat 1, which is attached by a hinge at the front end of the opening 31 of the hull and can be opened and closed by a fixing bar 32. On the back surface of the hatch cover 3 whose open state is fixed by, 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 of the steering handle 4. The plate operating cables 35 are respectively guided, and the water jet port 84 is rotated by the rotation of the steering shaft 33.
The steering cable 34 for horizontally swinging the rotating plate is operated, and the rotating plate operating cable 35 is pulled in different directions to rotate the rotating plate 37. The trim adjusting cable 38 for swinging the outlet 84 in the vertical direction is operated.

FIG. 8 shows a disassembled state of the grip portion of the steering handle 4. The handle body 41 has a mounting portion 42 for the rotating plate operating cable formed at the end thereof, and the grip portion 43 in front of the mounting portion 42. A claw member 45 is rotatably attached to the handle body 41 while being biased by a spring 44, and the cable attachment portion 42 of the handle body 41 is
The upper cover member 46 and the lower cover member 47 movably cover the inside thereof, and the grip portion 42 of the handle 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 mounting portion 42 of the handle body 41
Is an end portion 3 of each 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. The groove 49 is provided with notches at regular intervals.

As shown in FIG. 9, the grip portion of the steering handle 4 is covered by the grip member 48 by fixing the upper cover member 46 and the lower cover member 47 to the steering bar 51 by the bolt 50. The broken handle main body 41, via the cable mounting portion 42,
The upper cover member 46 and the lower cover member 47 rotatably hold the steering bar 51.

The grip portion of the steering handle 4 as described above is
After pressing the claw member 45 of the handle body 41 with a finger against the biasing 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 removed. By grasping and rotating the handle main body 41 to an appropriate position, separating 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 main body 41 The rotation position of the cable attachment portion 42 at the end of is changed and positioned, and the rotation plate operation cable 35 is operated.

10 and 11 show the mounting state of the fuel tank 6 mounted in the front part of the hull,
A recess 61 for mounting the oil tank 10 is formed on a part of the upper surface of the fuel tank 6, and the recess 61 has an oil tank 10 for preventing the oil tank 10 from moving. A protrusion 62 on the bottom wall of the fuel cell 10 and a recess 62 into which the cushioning member 11 attached thereto is fitted are formed. Further, the bottom wall of the fuel tank 6 prevents the fuel tank 10 from moving relative to the hull. In order to do so, a recess 63 for fitting the bolted cushioning member 101 into the protrusion 100 protruding from the fuel tank mounting portion of the hull is formed at an appropriate position.

In such a fuel tank 6, in a state where the recess 63 on the fuel tank side and the cushioning member 101 fixed to the protrusion 100 on the hull side are fitted together, together with the oil tank 10, a hull is provided by a band 64. Ribs 65 are formed at appropriate positions on the surface of the fuel tank 6 so that the band 64 that is fixed to the fuel tank 6 does not shift.

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 band body 6a made of a durable cloth which is not stretchable. 12 in the unloaded state.
The state shown in FIG. 12B and the state shown in FIG.
By fixing the fuel tank 6 with such a band 64, normally, 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 4, the elastic band member 6b absorbs the load by expanding, so that the band body 6a is not cut off, and the elastic band member 6b is fixed by the band body 6a to a certain extent or more. Since it does not fully extend, the elastic band member 6b does not fully extend and cut.

FIG. 13 shows an accommodating portion 9 provided below the seat 5 at the rear of the hull. The accommodating portion 9 disposed behind the battery 71 below the seat has a plug at the bottom thereof. Is formed, and a heat insulating material 92 is attached so as to cover the entire outer surface excluding this drainage hole 91 portion.

Therefore, normally, an exhaust pipe 72 extending rearward from the engine 7 is provided inside the hull below the seat 5 of the jet propulsion boat 1, and the accommodating portion 9 is located near the exhaust pipe 72. However, the storage part 9 has a heat insulating material 92.
By being covered by, the influence of the heat of the exhaust pipe 72 on the food and drinks contained therein is reduced.

Regarding the overflow prevention structure of the liquid tank of this embodiment applied to the oil tank 10 installed in the jet propulsion boat 1 having the above-described structure, the cylindrical injection port 15 is used. Since a large space is formed by the enlarged portion 15a in the middle of the flow, when the injected liquid fills the oil tank 10 and then rises up in the injection port 15, the rising speed of the liquid surface increases. It becomes slow at the position of 15a, and after confirming the liquid surface, the injection can be stopped with a margin and the liquid can be prevented from overflowing.

Further, the filter component 20 is provided with a collar-shaped member 22.
Since the ventilation pipe 23 that communicates between the upper side and the lower side is integrally formed, the air below the collar-shaped member 22 can flow upward through the ventilation pipe 23 when the liquid is injected. Oil tank 1 that drains instead of liquid
The air in 0 does not clog the liquid in the portion of the filter 21, and the overflow of the liquid due to the clogging of the filter is prevented.

Although the liquid tank overflow prevention structure of the present invention has been described above with reference to an embodiment of the oil tank 10 installed in the jet propulsion boat 1, the present invention is limited to such a specific application. It goes without saying that the present invention is widely applicable to general injection ports of liquid tanks.

[0033]

According to the overflow prevention structure for a liquid tank of the present invention as described above, the liquid level that rises in the inlet after the liquid is filled in the storage portion of the tank does not suddenly rise. Or by preventing the injected liquid from clogging the filter part, the injected liquid is prevented from overflowing from the injection port.

[Brief description of drawings]

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

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

3 is a cross-sectional view taken along the line AA of FIG.

4 (A) is a top view and FIG. 4 (B) is a bottom view of the filter component shown in FIG.

5 is an explanatory diagram showing an outline of 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 watercraft shown in FIG.

7 is a perspective view showing a structure for transmitting an operation from the steering handle on the back surface of the hatch cover of the jet propulsion watercraft shown in FIG.

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

9 is a partial sectional view showing a grip portion of a steering handle of the jet propulsion watercraft shown in FIG.

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

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

12 (A) is a top view showing the band itself for fixing the fuel tank shown in FIG. 10, (B) is a partial side view in a non-loaded state, and (C) is a partial side view in a loaded state. .

13 is a cross-sectional view showing the vicinity of a storage section installed in the jet propulsion watercraft shown in FIG.

[Explanation of symbols]

 10 Liquid Tank 15 Inlet 15a Enlarged Portion 20 Filter Part 21 Filter 22 Collar-shaped Member 23 Vent Pipe

Claims (2)

[Claims] 1. A liquid tank in which a tubular inlet is formed above a liquid container, and an enlarged portion in which a side wall of the inlet is largely bulged laterally in the middle of the tubular inlet. An overflow prevention structure for a liquid tank, characterized in that 2. A liquid tank in which a tubular inlet is formed above a liquid storage portion, wherein a filter component in which a collar-shaped member is attached to a peripheral portion of an inlet of a bag-shaped filter is a collar-shaped member. By fitting the outer peripheral part of the inner wall of the inlet into the inlet, it is detachably attached to the lower part of the inlet, and the ventilation pipe that communicates the upper side and the lower side of the collar-shaped member,
A structure for preventing overflow of a liquid tank, characterized in that it is integrally formed with a collar-shaped member so that its upper end extends to the vicinity of the opening of the injection port.