JP7110459B1 - Fuel container air control structure - Google Patents

Abstract

【Task】
Regarding the air control of the liquid fuel container where the liquid surface moves due to fluctuations in the air pressure in the fuel container or rocking, an O-ring is wrapped around the outer surface of the back-and-forth movable cylinder that moves back and forth in the fixed pipe to which the air pipe of the air chamber is attached. is an air control that does not block the air port, and there are manual and cam driven types for forward and backward movement.
A structure is adopted in which an air pipe of an air chamber is connected to an air port opened in a side wall, and an O-ring that slides on the inner surface of a fixed pipe is wrapped around a front-rear movable cylinder. The back-and-forth movement of this back-and-forth movement cylinder is a structure driven manually or by a cam system. The structure for manually moving the back-and-forth movement barrel back and forth is a structure in which a finger is hooked on a hook attached to the back-and-forth movement barrel to pull it. It has a connected lubricating lid, and has a structure in which the sealing lid or the lubricating lid is moved back and forth by a cam system.
[Selection drawing] Fig. 3

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air control structure for a liquid fuel container in which the air pressure within the fuel container fluctuates or the liquid surface moves due to rocking.

Liquid fuel tanks, such as automobile fuel tanks and lawn mower portable fuel tanks, that sway and fluctuate with movement require pneumatic control. In addition, the air pressure in the fuel tank moves unexpectedly due to changes in temperature, causing a problem that the fuel liquid cannot be smoothly taken in and out.

Jitsukai Showa 61-3124

In order to solve this problem, as described in Patent Document 1, entrained fuel and air are separated in a vent passage formed in the fuel injection pipe so that the entrained fuel does not interfere with the outflow of the air. For the purpose of improving the performance of fuel injection into the fuel tank, a partition wall is provided inside the fuel injection pipe to the fuel tank along the longitudinal direction from the installation part of the injection pipe to the tank to the vicinity of the fuel injection port. By forming an air passage and a fuel passage in the air passage, and providing a fuel return port for returning the fuel entrained in the outflowing air to the fuel passage side, the fuel entrained in the air passage is returned to the middle of the air passage. , the air flows out from the fuel return port toward the fuel passage and is separated from the outflowing air.

However, such a structure is complicated, difficult to manufacture, and expensive.
Focusing on such problems, the technical problem of the present invention is to prevent the O-ring wrapped around the outer surface of the back-and-forth motion cylinder moving back and forth in the fixed pipe attached to the air pipe of the air chamber from blocking the air port. It has a pneumatic control structure, and there is a manual type and a cam driven type for forward and backward movement.

The technical problems of the present invention are solved by the following means. In claim 1 , fuel oil containing gasoline is stored in a metal container (tank) 1, air enters an air chamber R, and the root of a pipe 2 whose tip is open to the air chamber R is air. An O-ring 4 attached to the air port a on the side wall of the fixed pipe 3 in the chamber R and wound around the front-rear movable cylinder slides on the inner surface of the fixed pipe and moves below the air port a. This air control structure for a fuel container is characterized in that the descent is stopped by hitting a stopper S at the lower end, and outside air enters the pipe 2 through a gap on the outside of the hose 6. - 特許庁

In claim 2, when the hose 6 is not used, the hose 6 is turned upside down in the container 1 so that the rear end of the forward/backward movement cylinder with the pull-out hook f can be inserted last. The cover 9 of the cylinder 8 is screwed to seal the opening, and when the cover 9 is opened when the fuel is put into or taken out of the container 1, the outside air enters the container 1 and passes through the pipe 2 into the air chamber. The structure according to claim 1 is characterized in that the R is also filled with air, and the hose 6 inserted inside can be easily pulled out by hooking a finger on the hook f and pulling it out. is the air control structure of the fuel container.

In claim 3, the inverted V-shaped edge of the wire spring formed in an inverted V-shape is formed into a semicircular shape to impart flexibility, and both ends of the hook f made of this wire spring are inserted into the ring of the O-ring 4. It is fixed to the inner wall surface of the forward/backward movable cylinder 5 in a state of being inserted into the space. , the O-ring 4 is fixed and cannot be lowered, moves back and forth at a position avoiding the air port a, is sealed by the elasticity of the hook f, and prevents oil and air from blowing out from the container 1. An air control method for a fuel container according to claim 1 or 2, characterized in that the O-ring (7) is sealed with its own elasticity .

As in claim 1 , fuel oil containing gasoline is stored in a metal container (tank) 1, air enters the air chamber R, and the root of the pipe 2 whose tip is open to the air chamber R is attached to the air port a on the side wall of the fixed tube 3 in the air chamber R, so that all outside air is collected in the air chamber R.
Since outside air enters the pipe 2 through a gap on the outside of the hose 6, the outside air is led to the air chamber R through this gap. In addition, since the O-ring 4 moves to the lower side than the air port a and hits the stopper S at the lower end to stop the descent, the air in the metal container 1 floats inside the hose 6 and is released to the outside air. .

As in claim 2, when the hose 6 is not in use, the O-ring 7 is wound in an annular shape so that the hose 6 can be turned upside down in the container 1 so that the rear end of the front-rear movement cylinder with the pull-out hook f can be inserted last. The cover 9 of the lid tube 8 is screwed to seal the opening, and when the cover 9 is opened when the fuel is put into the container 1 or taken out from the container 1, the outside air enters the container 1 and flows from the pipe 2. The air chamber R is also filled with air, and the hose 6 inserted inside can be easily pulled out by hooking a finger on the hook f and pulling it out.
Thus, in the configuration having the cover 9 for closing the air opening of the fixed pipe 3 and having the stopper S at the opposite end, the hose 6 is turned upside down inside the container 1 when the hose 6 is not in use. A cover 9 of a lid cylinder 8 wrapped with an O-ring 7 is screwed to seal the opening so that the rear end of the forward/backward movable cylinder to which the drawer hook f is attached can be inserted last. When the cover 9 is opened to take out fuel from the It is structured so that it can be easily taken out by hooking a finger on the hook f and pulling it out. When the hose 6 is not used, the hose 6 shown in FIG. 4 is turned upside down in the container 1 and pulled out. Since the cover 9 of the cylinder 8 is screwed to seal the opening, the O-ring 7 can be crimped to securely close the opening.
When the cover 9 is opened when fuel is put into the container 1 or when fuel is taken out of the container 1, the outside air enters the container 1, and the air enters the air chamber R from the pipe 2 and fills the container 1. The air inside is balanced, and fuel oil does not blow out due to temperature rise. The hose 6 inserted into the container 1 can be easily pulled out by hooking a finger on the hook f and pulling it out.

As in claim 3, the inverted V-shaped edge of the wire spring formed into an inverted V-shape is formed into a semicircular shape to impart flexibility, and both ends of the hook f made of this wire spring are attached to the annular O-ring 4. It is fixed to the inner wall surface of the forward/backward movable cylinder 5 in a state of being inserted into the inner space. The O-ring 4 is fixed on the lower side so that it cannot be lowered, and it moves back and forth at a position avoiding the air port a. The O-ring 7 is sealed with its own elasticity so that it does not. In this way, the container 1 is sealed with the elasticity of the hook f, and the O-ring 7 is closed with its own elasticity so that the oil and air do not blow out from the container 1 .
Both ends of the hook f made of the wire spring are fixed to the inner wall surface of the back-and-forth movement cylinder 5 in a state in which they pass through the annular space of the O-ring 4. When the back-and-forth moving cylinder 5 hits the lower end stopper S, the O-ring 4 is fixed below the air opening a and cannot be lowered. There is no danger of blocking the

It is a perspective view showing the whole picture of a manual opening and closing container. Fig. 3 is an exploded perspective view of the manually operated openable/closable container; FIG. 4 is a cross-sectional view of the manual openable/closable container during refueling; FIG. 4 is a cross-sectional view of the opening of the manual openable/closable container when it is closed; FIG. 2 is a cross-sectional view showing the entirety of the cam-type openable container. It is a cross-sectional view of the opening showing a cam-type opening and closing mechanism. It is a perspective view which shows the hose attachment/detachment mechanism of a cam-type openable/closable container. FIG. 11 is a perspective view showing another example of a cam-type opening/closing mechanism; FIG. 3 is a perspective view showing a closing lid of the cam-type openable/closable container;

Next, an embodiment will be described as to how the air control structure of the fuel container according to the present invention is practically embodied. FIG. 1 is a cross-sectional view showing the entirety of a fuel container according to the present invention, and FIG. 2 is an exploded perspective view thereof. Fuel oil is stored in a metal container (tank) 1, and air enters the upper space R. attached to the

A back-and-forth movable cylinder 5 wrapped with an O-ring 4 sliding on the inner surface of the fixed tube 3 is manually moved back and forth at a position where the air port a is absent. As shown in FIG. 2, a hose 6 through which fuel oil flows is attached to the forward/backward movable cylinder 5. When the connecting portion of the hose 6 is enlarged as shown in FIG. Since it moves to the lower side than the port a and stops by hitting the stopper S, outside air enters the pipe 2 through the gap on the outside of the hose 6 as indicated by the arrow.

When not in use, the container 1 is turned upside down as shown in FIG. 4, and the hose 6 is inserted into the container 1, and the cover 9 of the cover tube 8 wrapped with the O-ring 7 is screwed to seal the opening. When the cover 9 is opened when the fuel is put into the container 1 or the fuel is taken out of the container 1, the outside air enters the container 1, and the upper space R is also filled with air from the pipe 2. - 特許庁Further, the hose 6 inserted inside can be easily taken out by hooking a finger on the hook f and pulling it out. Of course, it is also possible to store it outside without inserting it into the container 1 .

If the O-ring 4 comes to a position where it closes the air port a and stops due to an operation error, outside air does not enter, resulting in a malfunction. Therefore, in order to avoid such a malfunction, the O-ring 4 is constructed so as not to stop at a position blocking the air opening a. That is, the V-shaped edge of the wire spring formed in a V shape is formed into a semicircular shape to impart flexibility, and both ends of the hook f made of this wire spring are inserted into the O-ring 4, and the front and rear ends are inserted into the O-ring 4. It is welded and fixed to the inner surface of the moving cylinder 5 . Moreover, when the lid cover 9 is tightened and the front-rear movable cylinder 5 hits the lower end stopper S, the O-ring 4 is fixed below the air opening a, thereby avoiding the air opening a. Since the hook f has some elasticity as described above, the cover 9 is sealed with elasticity. Finally, since the O-ring 7 is sealed with its own elasticity, it is impossible for oil or air to blow out from inside the container 1 .

FIG. 5 is a cross-sectional view showing an air venting structure for a cam-type openable container, and FIG. 6 is an enlarged view thereof. The air pipe 2 is attached to the air port a, and the sealed cylinder 8 wrapped with the O-ring 7 is opened and closed by the driving force of the cam. The pipe 2 is attached to the air port a of the fixed cylinder 3, and the O-ring 4 of the back-and-forth movable cylinder 5 is moved by cam drive. FIG. 7 is a perspective view of refueling with a hose 6. FIG. Cam shafts 12, 12 are inserted and supported in oblique guide holes 11, 11 of left and right support arms 10, 10 formed in the container 1. As shown in FIG. Now, as shown in FIG. 7, when the cam shafts 12, 12 are moved to the lower portions of the oblique guide holes 11, 11 and the cam lever is rotated, the front-rear movable cylinder 5 wrapped with the O-ring 7 is pushed down to close the opening. Refueling is performed at a remote position by a hose 6. - 特許庁

Conversely, when the cam shafts 12, 12 are moved to the upper portions of the slanted guide holes 11, 11 and the cam lever is rotated upward, the front-rear movable cylinder 5 wrapped with the O-ring 7 is pushed open, and air is introduced into the container 1. From the air pipe 2 the upper air chamber R of the container 1 is filled with air.

The cam mechanism can have various shapes and structures depending on the application, and another type of cam mechanism is illustrated in FIG. When closing the inlet/outlet of the tank 1, the cover lid 9 in FIG.

As described above, the structure for manually moving the back-and-forth movement cylinder around which the O-ring is wound can be easily realized because it is a structure in which the hook attached to the back-and-forth movement cylinder is pulled with a finger. Further, the structure using the cam mechanism has a sealing lid that closes the forward/backward movable barrel or a lubricating lid to which a lubricating hose is connected, and the sealing lid or the lubricating lid is moved back and forth by a cam drive. It can be easily realized by the mechanism, and even if the O-ring is strongly pressed, it can be easily moved back and forth to control oil supply, and oil can be supplied to a distant position with an oil supply hose.
In addition, since the atmosphere is always supplied to the air chamber and the air pressure in the fuel container is balanced, unexpected and abnormal movement of the fuel can be suppressed.

1 Metal container (tank)
2 Air pipe 3 Fixed cylinder R Air chamber a Air port 4 O-ring 5 Back-and-forth moving cylinder S Stopper 6 Hose 7 O-ring 8 Lid cylinder 9 Cover lid f Hooks 10, 10 Support arms 11, 11 Oblique guide holes 12, 12 Cam shaft

Claims (3)

Fuel oil containing gasoline is stored in a metal container (tank) 1, air enters an air chamber R, and the base of a pipe 2 whose tip is open to the air chamber R is fixed in the air chamber R. An O-ring 4 attached to the air port a on the side wall of the tube 3 and wound around the back-and-forth movement cylinder slides on the inner surface of the fixed tube, moves below the air port a, and hits the stopper S at the lower end. An air control structure for a fuel container, characterized in that the descent is stopped and outside air enters the pipe 2 through a gap on the outside of the hose 6 . When the hose 6 is not used, the hose 6 is turned upside down in the container 1 so that the rear end of the front/rear movable cylinder with the pull-out hook f can be inserted lastly. is screwed to seal the opening, and when the cover 9 is opened when fuel is put into or taken out of the container 1, outside air enters the container 1 and air is also introduced into the air chamber R from the pipe 2. 2. A fuel container according to claim 1, characterized in that the air in the fuel container can be easily taken out by hooking a finger on the hook f and pulling out the hose 6 inserted inside. control structure. The reverse V-shaped edge of the reverse V-shaped wire spring is formed into a semicircular shape to provide flexibility, and both ends of the hook f made of this wire spring are inserted into the annular space of the O-ring 4. In this state, the O-ring 4 is fixed to the inner wall surface of the forward/backward movable cylinder 5, and furthermore, at the position where the lid cover 9 is tightened and the forward/backward movable cylinder 5 contacts the lower end stopper S, the O-ring 4 is positioned below the air port a. is fixed and cannot be lowered, moves back and forth at a position avoiding the air port a, is sealed by the elasticity of the hook f, and an O-ring 7 is installed so that oil and air do not blow out from the container 1. 3. The air control method for a fuel container according to claim 1, wherein the fuel container is sealed with its own elasticity .

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