JPH036284Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to the inner plug sealing structure of a sealed air pot, and particularly to the packing interposed between the inner plug and the shoulder opening.

[Conventional technology]

Generally, in an air pot, the inside of the inner bottle is communicated with the atmosphere through an air pump, so there is no need to worry about the internal pressure of the inner bottle increasing. Since it leaks, a sealed structure is used.

In the case of a hermetically sealed structure, simply using a normal gasket for the sealing part may result in an incomplete seal if the inner plug lifts due to an increase in internal pressure. For this reason, the applicant has previously filed an application for utility model registration for a gasket having a special shape as shown in FIG. (Jitsugan 60-15417
issue).

This gasket 1 has a skirt portion 4 protruding outward and downward on a base portion 3 fitted into an inner plug 2,
The skirt portion 4 is brought into pressure contact with the opening 6 of the pot shoulder body 5.

[Problem that the invention attempts to solve]

In the above-mentioned seal 1, when the internal pressure increases, the skirt 4 exerts a sealing effect by coming into pressure contact with the inner peripheral surface of the opening 6, so there is no problem even if the inner plug 2 lifts up a little due to the increase in internal pressure. There isn't.

However, when the hot water cools and the internal pressure becomes negative, the gasket 1 deforms in the direction of sucking in outside air, resulting in an incomplete seal.

Therefore, the object of this invention is to provide a sealing structure that fully exhibits the sealing effect both when the internal pressure increases and when the internal pressure decreases to negative pressure.

[Means for solving problems]

In order to solve the above problems, this invention attaches the base of the plug to the outer periphery of the inner stopper, has a skirt part that hangs downward outward from the base, and a skirt part that protrudes outward from the base at the top of the skirt part. A gap is provided between the inner circumferential surface of the skirt portion and the outer circumferential attachment portion of the inner plug, and the outer circumferential surface of the skirt portion is brought into close contact with the inner circumferential surface of the shoulder body opening. The structure is such that it is in close contact with the upper periphery of the shoulder body opening.

[Effect]

When the internal pressure increases, the skirt portion comes into close contact with the inner peripheral surface of the opening to form a seal. Furthermore, when the internal pressure becomes negative, the lip portion comes into close contact with the upper periphery of the opening to form a seal.

〔Example〕

Figure 1 shows an example of a sealed air pot, in which a shoulder body 12 is attached to the top of a stainless steel double-walled medium bottle 11 with screws 13, an opening 14 is formed in the center of the shoulder body 12, and the medium bottle is closed. A gasket 16 is interposed between the mouth part 15 of 11 and the shoulder body 12.

The inner stopper 17 has a groove-shaped mounting portion 20 formed on the outer circumferential surface facing the opening 14, into which the base 19 of the gasket 18 (see FIG. 3) is mounted.
A collar 21 is provided protruding from the outer periphery of the 0 edge. Tsuba 2
1 protrudes above the upper peripheral edge of the opening 14 with a required gap.

The above-mentioned packing 18 has a skirt part 22 that hangs downwardly outside the base part 19, and a lip part 23 that projects outward from the base part 19 at the upper part of the skirt part 22. Along the bottom surface of 21. A gap a is provided between the inner circumferential surface of the skirt portion 22 and the inner plug outer circumferential mounting portion 17, and the outer circumferential surface of the skirt portion 22 is connected to the opening 14.
It is tightly attached to the inner circumferential surface of the

Therefore, when the inner plug 17 is tightened, the skirt portion 22 comes into close contact with the inner peripheral surface of the opening 14, and the lip portion 23 comes into close contact with the upper peripheral edge of the opening 14.

In addition, in the figure, 24 is an air pump, 25 is a valve chamber communicating with the air pump 24, and 26 is a water supply pipe rotatably inserted into the valve chamber 25. A water hole 27 is formed at the rear end of the water supply pipe 26, and a gasket 30 facing the air passage 29 is integrally attached to one side of the gasket 28 (see FIG. 2) that surrounds the water hole 27. It has been formed. Further, a water passage 31 is connected to the valve chamber 25, and the water passage 31 communicates with a water pumping pipe 34 via a safety valve 32. Further, an air hole 35 communicating with the inside of the inner bottle 11 is formed in the valve chamber 25 .

In the above air pot, when the knob 36 provided at the tip of the water supply pipe 26 is grasped and rotated 90 degrees as shown in the figure, one gasket 30 is removed from the air passage 29 and the water passage hole 27 is inserted into the water passage 3.
1 and is surrounded by the other gasket 28 for sealing.

Further, since the inside of the valve chamber 25 and the air passage 29 communicate with each other, the inside of the inner bottle 11 communicates with the air passage 29 via the air hole 35 and the valve chamber 25. Therefore, when the air pump 24 is operated, the internal pressure of the inner bottle 11 increases, and water is injected through the pumping pipe 34, the valve chamber 33 of the safety valve 32, the water passage 31, and the water supply pipe 26.

In the above air pot, the water supply pipe 26
When the inner bottle 11 is in the closed state, when the internal pressure of the inner bottle 11 increases, the skirt portion 22 of the packing 18 is pressed by the pressure in the gap a. Therefore, the skirt portion 22 is pressed against the inner circumferential wall of the opening 14 to maintain an airtight and watertight state. Furthermore, when the internal pressure decreases to negative pressure, the lip portion 23 opens at the opening 14.
It is pressed against the upper periphery of the tube to maintain airtight and watertight conditions.

〔effect〕

As mentioned above, this invention aims at sealing between the inner stopper and the opening of the shoulder body by using a packing having a lip part and a skirt part, which increases and decreases the internal pressure of the inner bottle. In either case, an airtight/watertight state can be maintained reliably. Therefore, it is suitable as a sealing structure for a portable air pot that is sometimes carried on its side.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the embodiment, FIG. 2 is an enlarged sectional view showing a part of the same, FIG. 3 is a sectional view of the packing same as the above, and FIG. 4 is a sectional view of a conventional seal structure. 11... Inner bottle, 12... Shoulder body, 14... Opening, 17... Inner stopper, 18... Packing, 19...
Base, 20... Mounting part, 21... Brim, 22...
Skirt part, 23...Rip part.

Claims (1)

[Scope of utility model registration request] An opening facing the mouth of the inner bottle is provided on the shoulder body of the air pot, and a packing is attached to the outer circumferential attachment part of the inner stopper, and the packing is pressed into contact with the opening, and the inside of the inner bottle is sealed in the closed state. In the inner plug seal structure of the airtight air pot, the base of the gasket is provided with a skirt portion that hangs outward and downward, and the upper part of the skirt portion is provided with a lip portion that protrudes outward from the base. A gap is provided between the circumferential surface and the outer circumferential attachment portion of the inner plug, and the outer circumferential surface of the skirt portion is brought into close contact with the inner circumferential surface of the shoulder opening, and the lip portion is brought into close contact with the upper peripheral edge of the shoulder opening. The inner plug seal structure of the airtight air pot is characterized by