JPH0415145Y2 - - Google Patents

Description

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

[Conventional technology]

Generally, in an air pot, the inside of the inner bottle communicates with the atmosphere through an air pump, so
An increase in internal pressure of the medium bottle during cooling with hot water can be avoided. However, since portable air pots are sometimes carried horizontally, a sealed structure is required to prevent hot water from leaking. Therefore, the internal pressure of the inner bottle increases, and a pushing force may act on the inner stopper.

In order to counteract this upward force, in conventional air pots of this type, the bellows lower plate of the air pump, which is engaged with the outer lid of the pot, is pressed against the upper surface of the inner stopper, and the above upward force is applied through the bellows lower plate. It had a structure in which it was supported by an outer lid.

[Problem that the invention attempts to solve]

However, the bellows lower plate of conventional air pumps was molded from synthetic resin materials such as polyethylene and polypropylene and did not have sufficient strength, so an increase in internal pressure could cause upward force on the inner plug. When this happens, the bellows lower plate deforms, and as a result, the inner stopper lifts up, resulting in an incomplete seal and the risk of hot water leaking.

Therefore, this idea solves the above problem by adding a device to the fitting structure of the inner plug in a sealed air pot that opens and closes the inner plug by changing the rotation angle of the water supply pipe inserted into the inner plug. The task is to do so.

[Means to solve the problem]

In order to solve the above-mentioned problems, this invention removably fits the inner stopper 7 to the inner peripheral edge of the shoulder body 2 which is tightly fitted to the mouth 5 of the inner bottle 1, and the outer circumference of the inner stopper 7 is In a sealed air pot in which the inner circumferential edge of the shoulder body 2 is sealed with the inner circumferential edge of the shoulder body 2 by the inner plug first gasket 8 attached to the inner plug, and the bellows lower plate 19 of the air pump 18 is pressed against the upper surface of the inner plug 7, the inner plug is A water supply pipe 14 is inserted into the inner stopper 7, and a switching valve device 31 operated by the water supply pipe 14 is provided inside the inner stopper 7.
8 and the inside of the inner bottle 1, and an open state in which the inner stopper 7 and the pumping pipe 25 integrated with the inner stopper 7 communicate with the water supply pipe 14;
The inner plug is an air-cussion type inner plug that is in close contact with the inner circumferential surface of the mouth 5 of the inner bottle 1 on the outer peripheral surface of the lower part of the inner plug 7. It has a configuration in which a second gasket 10 is attached.

[Effect]

When the inner stopper 7 is in the closed state, if the internal pressure of the inner bottle 1 increases and the inner stopper 7 is pushed up, the second inner stopper gasket 10 attached to the outer periphery of the lower part of the inner stopper 7 closes the opening of the inner bottle 1. It slides while remaining in close contact with the inner circumferential surface of the portion 5.

〔Example〕

Figure 1 shows an example of a sealed air pot, in which a shoulder body 2 is attached to the top of a stainless steel double-walled medium bottle 1 with screws 3, and the opening 5 of the medium bottle 1 and the inner peripheral edge of the shoulder body 2 are connected. A patchkin 6 is interposed in between, and the shoulder body 2
A first inner plug packing 8 is interposed between the inner plug 7 and the inner plug 7.

The lower half of the inner stopper 7 is inserted at a constant interval from the inner circumferential surface of the inner container opening 9 of the inner bottle 1, and a middle portion that is in close contact with the inner circumferential surface of the inner container opening 9 is attached to the outer periphery of its lower end. A second plug 10 is attached. As shown in an enlarged view in FIG. 2, this gasket 10 is of an air cushion type that bulges outward, and the inner circumferential surface of the inner container opening 9 is designed so that there is no problem during normal insertion and removal. Consideration is given to reducing frictional resistance with the

Inside the inner stopper 7, there is a water passage 11 and an air passage 12.
A water supply pipe 14 is rotatably inserted into the valve chamber 13 from the side. A water passage hole 15 is provided at the rear end of the water supply pipe 14.
is formed.

A safety valve device 24 is connected to the water passage 11, and a water pumping pipe 25 is connected to the safety valve device 24.

The air passage 12 is abutted against a connection port 20 provided in the bellows lower plate 19 of the air pump 18.

Furthermore, an air hole 21 communicating with the inner bottle 1 is provided at the lower part of the valve chamber 13 .

The above-mentioned water passage 11 and air passage 12 are vertically opposed to each other, and the water supply pipe 1 is located between them.
4 is inserted, and its water passage hole 15 faces the water passage 11 according to the rotation angle of the water supply pipe 14.

The switching valve device 31 that switches communication/blocking between the water passage 11, the air passage 12, and the water hole 15 has a water opening/closing gasket 16 ( (see FIG. 3) and an air opening/closing gasket 17 formed adjacent to the gasket 16 in the circumferential direction. The above gaskets 16 and 17 are integrally formed.

When the gasket 16 faces to the side according to the rotation angle of the water supply pipe 14 as shown in FIGS. 1 and 3, the gasket 16 contacts the inner circumferential surface of the valve chamber 13 and closes the water passage hole 15. At this time, the packing 17 is connected to the air passage 1.
2 and closes the air passage 12.

Further, when the gasket 16 is turned downward in accordance with the rotation of the water supply pipe 14, it comes into close contact around the water passage 11, thereby communicating the water passage 11 and the water passage hole 15.
At this time, the gasket 17 comes off the air passage 12 and opens it.

A nozzle head 26 and its cover 27 are provided at the tip of the water supply pipe 14, and a knob 30 having a knob operation piece 28 of the nozzle head 26 is integrally fitted therein.

Note that the bellows lower plate 19 is engaged with a vertical rib 23 formed on the inner surface of the pump outer lid 22.

The configuration of the embodiment of this invention is as described above, and as shown in FIG. 1, the rotation angle of the water supply pipe 14 is such that the water passage hole 15 provided in the water supply pipe 14 faces to the side. At this time, the water opening/closing gasket 16 of the switching valve device 31 contacts the inner surface of the valve chamber 13 to close the water passage hole 15, and at this time, the air passage 12 is closed by the air gas opening/closing gasket 17. That is, the inner stopper 7 is in a closed state. Therefore,
At this time, hot water is not discharged even if the air pump 18 is operated.

Next, when the knob 30 is operated to rotate the water supply pipe 14 by about 90 degrees, the air opening/closing gasket 17 of the switching valve device 31 is removed from the air passage 12, and the water passage hole 15 faces the water passage 11. It is surrounded by a water passage opening/closing gasket 16 and sealed. Further, the inside of the valve chamber 13 communicates with the air passage 12 via the air hole 21 and the valve chamber 13. That is, the inner stopper 7 is in an open state. Therefore, if the air pump 18 is activated at this time, the internal pressure of the inner bottle 1 will rise, and hot water will be discharged from the nozzle 29 at the tip of the bottle through the pumping pipe 25, the safety valve device 24, the water passage 11, and the water supply pipe 14. Ru.

In the above air pot, when the internal pressure increases with the inner plug 7 in the closed state, a pushing force acts on the inner plug 7, and the first inner plug packing 8 lifts up from the inner peripheral edge of the shoulder body 2. The inner plug second packing 10 attached to the outer peripheral surface slides together with the inner plug 7. Therefore, a watertight state with the inner circumferential surface of the inner container mouth portion 9 is maintained.

Note that when inserting the inner stopper 7 into the mouth 5 of the inner bottle 1, if the inner stopper 7 is closed, there is no escape port for the air inside the inner bottle 1, so the internal pressure of the inner bottle 1 will increase. However, since the inner plug second packing 10 is of an air cushion type, it is easily deformed during insertion. Therefore, the inner stopper 7 can be inserted smoothly while releasing the air inside the inner bottle 1, and the original seal shape is maintained under normal conditions.

〔effect〕

As described above, this invention is a sealed air pot equipped with a switching valve device 31 that can close or open the inner stopper 7 depending on the rotation angle of the water supply pipe 14 inserted through the inner stopper 7. A first inner plug packing 8 is attached to the outer circumferential surface of the inner plug 7 and brought into close contact with the inner circumferential edge of the shoulder body 2, and a second inner plug packing 10 of an air cushion type is attached to the lower outer circumferential surface of the inner plug 7. Since it is brought into close contact with the inner circumferential surface of the opening 5 of the inner bottle 1, even if the inner stopper 7 is pushed up due to an increase in the internal pressure of the inner bottle 1, the inner stopper second gasket 10 will not touch the opening 5. It moves together with the inner plug 7 while slidingly contacting the inner peripheral surface of the inner plug 7. Therefore, even if the inner plug 7 is pushed up, the watertight state can be maintained, and the inner plug 1
Assists the sealing force of the packing 8.

In addition, since the inner stopper second packing 10 is of an air cushion type, it easily deforms when inserting the inner stopper 7, and can be inserted smoothly while letting the air inside the inner bottle 1 escape, and also has a sealing force after insertion. effective.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a part of the embodiment, FIG. 2 is a partially enlarged sectional view of the same, and FIG. 3 is a perspective view showing a part of the water supply pipe. 1...Middle bottle, 2...Shoulder body, 5...Mouth, 7...
... Inner plug, 8... Inner plug first packing, 10... Inner plug second packing, 11... Water passage, 12... Air passage, 13... Valve chamber, 14... Water supply pipe, 15
...Water hole, 16...Water flow opening/closing gasket, 17...
...Air opening/closing gasket, 18...Air pump,
19... Bellows lower plate, 20... Connection port, 31...
...Switching valve device.

Claims (1)

[Scope of utility model registration request] The inner stopper 7 is removably fitted to the inner peripheral edge of the shoulder body 2 that is tightly fitted to the mouth 5 of the inner bottle 1, and the inner stopper 7 is attached to the outer circumference of the inner stopper 7 to close the shoulder body. In the airtight air pot, in which the bellows lower plate 19 of the air pump 18 is pressed against the upper surface of the inner stopper 7, the water supply pipe 14 is inserted into the inner stopper 7, and the water supply pipe 14 is A switching valve device 31 operated by is provided inside the inner stopper 7, and the switching valve device 31 allows the air pump 18 and the inside of the inner bottle 1 to communicate with each other.
Lifting pipe 25 and water supply pipe 14 integrated with inner stopper 7
and the pumping pipe 2
5 and the water supply pipe 14, and an air compression type inner plug is provided on the outer peripheral surface of the lower part of the inner plug 7, which is in close contact with the inner peripheral surface of the mouth part 5 of the inner bottle 1. This airtight air pot is characterized by being equipped with a second seal 10.