JP2002068262A - cap - Google Patents

Abstract

(57) Abstract: The present invention relates to a cap which is closed at an opening of a container which is, for example, various oil tanks, cooling liquid tanks, cleaning liquid tanks, and other liquid supply tanks for automobiles. The problem is to reliably prevent leakage of the liquid in the container. A cap for closing an opening in a container for supplying liquid, wherein one end opening (1b) of an air hole communicating between the outside and the inside of the container is provided on a side wall of the cap. One.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cap which is closed at an opening of a container which is, for example, various oil tanks, cooling liquid tanks, cleaning liquid tanks, and other liquid supply tanks for automobiles.

[0002]

2. Description of the Related Art Conventionally, containers (tanks) for supplying various liquids.
As the oil, gasoline or cleaning liquid in the closed container is consumed from the lower supply port (discharge port), air is introduced into the container by an amount corresponding to the consumed volume. Since it is necessary, an air introduction hole is provided.

[0003] The air introduction hole is usually provided in the ceiling surface of the cap so as to penetrate in a small vertical direction.

[0004]

However, in the method in which the air introduction hole is provided in the ceiling surface of the cap, since the opening is upward, water droplets such as rain and dirt easily enter the container from the air introduction hole. Further, there is a problem that the air hole may be clogged, and furthermore, for example, if gasoline or the like leaks from the air introduction hole when the container is turned over, there is a risk of ignition. The cap according to the present invention is proposed to solve such a problem.

[0005]

The gist of the present invention to solve the above-mentioned problem is to provide a cap for closing an opening in a container for supplying liquid, wherein the cap is provided outside and inside the container. One end opening of the air hole that communicates with
This is provided on the side wall of the cap.

The air hole comprises a horizontal air hole communicating from the outer surface of the side wall of the cap to the inner space, and a vertical air hole communicating with the horizontal air hole and opening on the lower surface of the side wall of the cap. A sealing cap for closing the outer opening is provided at an outer opening of the lateral air hole; and a packing interposed between a container and a cap on a ceiling wall surface inside the cap. A partition wall is provided which is in contact with the provided cylindrical partition wall with a gap therebetween, and the partition wall of the cap has an open end formed in a spiral shape;
A plate provided with an air hole is attached to the inside of the cap, and the air hole of the plate is provided with a filter that allows air to permeate and does not allow liquid to permeate.

According to the cap of the present invention, an air hole for introducing external air into the container when the liquid is supplied from the container is provided in the side wall of the cap, and at least the air hole is formed on the ceiling surface. Since there is no opening at one end, rainwater, dust and the like do not clog the air holes, and there is no inconvenience in liquid supply.

The air hole comprises a horizontal air hole and a vertical air hole communicating with the horizontal air hole, and a seal cap is provided at an outer opening of the horizontal air hole. In molding with a mold, at least one or more lateral air holes may be provided in the lateral direction from the surface of the side wall toward the internal space. Therefore, the structure is complicated because the mold is released while being twisted and rotated from the mold as in the related art, but the mold design of the cap is facilitated.

Further, since the partition wall inside the cap is a partition wall having an open end formed in a spiral shape, there is no problem in rotating the mold from the screw portion of the cap in molding the mold. Things. Furthermore, in the plate inside the cap, the air hole is provided with a filter that allows air to permeate and does not allow liquid to permeate, so that even if the container is turned over, the liquid leaks out through the air vent for air vent. And the safety of the container is improved.

[0010]

Next, a cap 1 according to the present invention will be described with reference to the drawings. As shown in FIG. 1, the cap 1 closes an opening 2a of a container 2 that stores and supplies various kinds of oil, gasoline, or a cleaning liquid by screwing.

When the cap 1 is screwed into the opening 2a, a packing 3 for preventing the liquid in the inner space of the container 2 from jumping up due to vibration or the like and directly colliding with the cap 1 to leak out to the outside. Be mounted. This packing 3
Is an oil-resistant rubber packing.

A seal cap 4 is fitted in the outer opening 1b of the air hole opening in the side wall 1a of the cap 1. The seal cap 4 is made of rubber or another synthetic resin.

The structure of the cap 1 will now be described. As shown in FIGS. 2 to 4, there is a ceiling 1c and a side wall 1d extending around the periphery thereof.
It is composed of a thick-walled convex side wall 1a and a concave side wall 1e. The side wall portion 1a is provided with a vertical air hole 1f having an opening at one end of the air hole on the lower surface of the cap. As shown, this vertical air hole 1f
Is that one or more of them are used as air holes, and usually one place is used as an air hole,
It is sufficient for liquid supply.

A screw portion 1g is provided on the inner peripheral wall surface of the side wall portion of the cap 1, and the space in which the screw portion 1g is provided is used as a first space portion and further cut into the ceiling portion 1c to form a second space portion. The partition 1h is provided there. The opening end 1i of the partition 1h is formed in a spiral shape.

A lateral air hole 1j is provided in communication with the second space of the cap. This horizontal air hole 1j
Are communicated at the upper end of one of the vertical air holes 1f. Thereby, the one vertical air hole 1f and the internal space (the first space and the second space) are
Communication is established through the lateral air holes 1j.

The packing 3 is, as shown in FIG.
The opening 2a of the container 2 is closed, and a partition wall 3a is provided at the center thereof, and an air vent 3b is provided at the center thereof. The partition wall 3a of the packing 3 has a size corresponding to the partition wall 1h of the cap 1, and in a use state,
A narrow gap 6 (see FIG. 8) is formed between the partition walls 1h and 3a, and serves as a flow path for introducing and removing air.

When the cap 1 and the packing 3 formed as described above are used, as shown in FIG. 6, the packing 3 is first placed on the opening 2a of the container 2 and the lid is closed, and then the cap 1 is opened. The screw portion 1g is fitted into the screw portion 2a and screwed.

Then, as shown in FIG. 7, the seal cap 4 is pushed into the outer opening 1b of the lateral air hole 1j in the cap 1 and fitted. Thereby, the one end side opening of the lateral air hole 1 is closed. In this manner, as shown in FIG.
An air flow path communicating with the narrow gap 6 of the partition, the second space, the horizontal air hole 1j, and the vertical air hole 1f is formed.

Therefore, when the air inside the container 2 expands due to a rise in temperature, it escapes to the outside as shown by the arrow in the drawing, and conversely, when the liquid is consumed and the liquid level drops, the arrow from the outside starts. External air is introduced into the container 2 in a direction opposite to the direction shown by.

In this way, as shown in FIG. 9, for example, the supply of a liquid (for example, light oil or gasoline) from the supply port (discharge port) 2b of the container 2 as an oil tank for storing hydraulic oil is performed by a supply tube. 5 to the engine and the like smoothly. Further, since the outer opening 1b of the air hole is opened at the lower surface of the side wall 1d of the cap 1, dust or the like may be clogged in the air hole (1f or the like) and obstruct the introduction or discharge of air. There is no one.

Further, when the liquid in the container jumps up due to vertical vibration or the like, the packing 3 prevents the liquid from directly colliding with the cap 1 and leaking out through the air holes. At that time, even if a part of the liquid enters through the small-diameter air vent hole 3b and reaches the space between the partition walls 1h and 3a,
Almost all of the air vent holes 3 from the space in the two partition walls
b and returns into the container. Both partitions 1h, 3
Even if the liquid jumps out from the slight gap 6 of a, the liquid stays in the second space of the cap 1 and almost no liquid reaches the outside from the lateral air hole 1j.

Further, a narrow gap 6 between the partition walls 1h and 3a is provided.
The horizontal air hole 1j is located on the opposite side of the center axis 2c (vertical direction) of the container 2 as shown in FIG. 8, for example, so that the liquid reaches the second space of the cap 1. It does not leak to the outside.

In the second embodiment of the present invention, as shown in FIG. 10, even when the container 2 is turned over, for example, the liquid such as gasoline or the like is discharged to the outside because the cap 1 is closed. This is an example of a device that does not leak.

The cap 1 has the same structure of the vertical air holes 1f and the horizontal air holes 1j in the side wall 1a as in the first embodiment, except that a plate 7 made of synthetic resin is provided inside the cap 1.
And a ring-shaped rubber packing 8 are mounted.

The plate 7 covers the opening 2a of the container 2 and has a cylindrical partition wall 1h of the cap 1 at the center.
a is provided, and a cylindrical partition 7b is provided inside the container. The partition 1ha and the partition 7a are partially provided with a notch 7c so as to form a communication hole for venting air when the lid is closed. Also,
The hole of the cylindrical partition wall 7b is the air vent hole 3 of the first embodiment.
The diameter is much larger than b (for example, φ10 mm).

A special filter 9 is fixed to the plate 7 in the middle of the communicating holes of the cylindrical partition walls 7a and 7b by fixing means such as ultrasonic welding. This filter 9
Is a special substance that does not allow liquid to pass through, but allows air to pass through (equivalent to an oleobent filter manufactured by Japan Gore-Tex Corporation).

In order to use the cap 1 according to the second embodiment formed as described above, the plate 7 is fitted inside the cap 1, and the rubber packing 8 is further pushed into the cap to be integrally mounted. .

The cap 1 is screwed into the opening of the container 2 and closed. When the air inside the container 2 expands, it passes through the filter 9 through the hole of the cylindrical partition wall 7b, and the notch 7
c and escapes outside through a horizontal air hole 1j and a vertical air hole 1f. Further, when gasoline or the like inside the container 2 is consumed, the pressure inside the container is reduced by the consumed amount, and air is introduced into the container 2 from outside through the reverse flow path.

Even if the container 2 is turned over, the liquid such as gasoline inside the container is prevented from leaking by the rubber packing 8 and the air is allowed to permeate. Leakage is prevented by a filter 9 that is impermeable to liquids. Therefore, the liquid does not leak out from the air vent hole of the cap 1 to the outside, thereby preventing a disaster such as a fire due to ignition.

[0030]

As described above, the cap according to the present invention is a cap for closing the opening of the container for supplying liquid, and has an air hole for communicating the outside and the inside of the container. Since the one end opening is provided on the side wall of the cap, rainwater, dust and the like do not enter and clog from the one end opening, and an excellent effect that a smooth supply state of the liquid is maintained. is there.

The air hole comprises a horizontal air hole communicating from the outer surface of the side wall of the cap to the inner space, and a vertical air hole communicating with the horizontal air hole and opening on the lower surface of the side wall of the cap. Since a seal cap for closing the outer opening is provided in the outer opening of the lateral air hole, forming the vertical and horizontal air holes results in an air hole without clogging and a mold. Also in the production, there is an excellent effect that the design is facilitated and the design restrictions are eliminated.

On the ceiling wall surface inside the cap, a partition wall is provided, which partially abuts a cylindrical partition wall provided in the packing interposed between the container and the cap with a gap therebetween. Since the partition wall has an open end formed in a spiral shape, in forming a mold for a cap having a threaded portion on the inner peripheral wall surface, when releasing the mold while rotating the threaded mold, The mold at the opening end can also be easily released.

A plate provided with an air hole is mounted inside the cap, and the air hole of the plate is provided with a filter which allows air to permeate and does not allow liquid to permeate. Even if this is done, external leakage of the liquid is prevented, and the cap serves as a cap for maintaining the safety of the container.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing an attached state of a cap according to the present invention.

FIG. 2 is a perspective view (a) of the cap according to the present invention as viewed obliquely from below, and a perspective view (b) as viewed obliquely from above.

FIG. 3 is a bottom view of the cap according to the present invention.

FIG. 4 is a longitudinal sectional view of the cap according to the present invention.

FIG. 5 is a plan view (a) of the packing and a front view (b) including a half sectional view of the packing.

FIG. 6 is a longitudinal sectional view showing a state where the cap according to the present invention is attached to a container.

FIG. 7 is a partial cross-sectional view of the use state of the cap according to the present invention.

FIG. 8 is an explanatory view showing a flow of air in a use state of the cap according to the present invention.

FIG. 9 is an explanatory view showing an example of a use state of the container provided with the cap according to the present invention.

FIG. 10 is a longitudinal sectional view of a cap according to a second embodiment of the present invention.

[Explanation of symbols]

1 cap, 1a side wall, 1b outer opening, 1c
Ceiling, 1d side wall, 1e side wall, 1f vertical air hole, 1g screw, 1h partition, 1i open end, 1j
Lateral air hole, 2 container, 2a opening, 2b supply port,
2c center shaft, 3 packing, 3a partition, 3b air vent hole, 4 seal cap, 5 supply tube, 6
Gap, 7 plates, 8 rubber packing, 9 filters.

Continued on the front page F term (reference) 3E084 AA04 AA06 AA12 AB01 AB04 BA03 CA01 DA01 DB12 EA01 FA09 FB01 GA01 GB01 KA09 KB01 4D006 GA32 GA41 HA41 JA02Z MA03 MB03 PA05 PB12 PB13 PB70 PC80

Claims (4)

[Claims] 1. A cap for closing an opening of a container for supplying liquid, wherein one end opening of an air hole communicating between the outside and the inside of the container is provided on a side wall of the cap. A cap characterized by the following. 2. The air hole comprises a lateral air hole communicating from the outer surface of the side wall of the cap to the inner space, and a vertical air hole communicating with the lateral air hole and opening on the lower surface of the side wall of the cap. The cap according to claim 1, wherein a seal cap configured to close the outer opening is provided at an outer opening of the lateral air hole. 3. A partition wall is provided on a ceiling wall surface inside the cap, the partition wall being partially in contact with a cylindrical partition wall provided in a packing interposed between the container and the cap, with a gap therebetween. The cap according to claim 1, wherein the partition wall of the cap has an open end formed in a spiral shape. 4. A plate provided with an air hole is provided inside the cap, and the air hole of the plate is provided with a filter that allows air to pass therethrough and does not allow liquid to pass therethrough. Item 3. The cap according to item 1 or 2.