JPS6231082Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an air pot having a structure in which a bellows body is compressed to pressurize the inside of a medium bottle, and the liquid inside is sent to the outside of the medium bottle through a liquid pumping pipe.

Many air pots using bellows bodies have been reported in the past, but the interior of these bellows bodies is often exposed to steam from the liquid content at all times except when deflated, especially in the case of electrically heated air pots. This caused problems such as a decrease in the elasticity of the bellows body and accelerated deterioration of the material.

The air pot according to the present invention solves both of the above-mentioned problems of preventing steam from entering the inside of the bellows body and preventing an increase in pressure inside the inner bottle due to the high-temperature content liquid, and at least (a) (b) The bellows body is biased in the direction of expansion, and (b) the bellows body is penetrated and one of the bellows bodies is connected to the movable plate of the bellows body so as to be in a shaft-sealed state at least when the body is stationary and during liquid feeding, and the other side is the bellows body. (c) A tubular shaft that is loosely penetrated through a valve mechanism so that the shaft is in a sealed state and a vented state when the body base plate is left still and when liquid is delivered, respectively, and (c) the tubular shaft is made to be in a closed state when liquid is delivered. The bellows body is characterized by having an operating portion that can be moved back and forth in the direction of the bellows body base plate together with the bellows body movable plate.

To explain the present invention based on the drawings, Fig. 1 is a longitudinal cross-sectional view of a main part of an embodiment of an electric heating type air pot according to the present invention, in which a main body 1 is connected to an inner bottle body 2, a heat insulating material 3, and an exterior body 4. The liquid lift pipe 5 is arranged from the inside of the medium bottle body 2 to the outside, and the medium frame body 6 is connected to the medium bottle body 2.
Further, although not shown, an electric heating device and the like are provided at the lower part of the inner bottle body 2, and a liquid level indicator is provided on the outer surface of the main body 1. Lid body 7
is attached to the main body 1 by a hinge part 8 so as to be freely openable and closable, and a bellows body 10 is removably locked in the inner engagement groove 9 at the base plate 11 of the bellows body, and when the lid is closed, it is attached to the middle frame body 6. It is attached via a gasket 12. A tubular shaft 14 is loosely passed through the bellows body 10 through a bellows body base plate 11 and a bellows body movable plate 13, and an upper flange portion 17 and a bottom flange portion 18 covered with elastic materials 15 and 16, respectively, are attached to the bellows body. The bellows body base plate 11 resists the repulsive force of the spring 19 installed in the bellows body base plate 11.
The bellows body movable plate 13 is held between the bellows body movable plates 13 and, at the same time, the ventilation gap between the bellows body 10 and the tubular shaft 14 is sealed. Further, a pressing body 20 is disposed close to the upper flange portion 17 of the tubular shaft 14, and is disposed between the bellows body movable plate 13 via a spring 21, and further upwardly has a pressing body 20 in slidable spherical contact with this. Operating body 2
2 is attached to the ceiling opening of the lid 7, and an exhaust hole 23 is formed in this attachment gap. In addition, in the above, by arranging the pressing body 20 and the pressing operation body 22 in an overlapping manner on the upper flange portion 17, a heat insulating effect is also produced.

In the above embodiment, when the bellows body 10 is not operated, that is, when it is left still, the inner bottle body 2, the tubular shaft 14, and the exhaust hole 23 are in a state of ventilation with each other as shown in the figure, so that, for example, the content liquid 24 is heated. Even if the internal pressure of the medium bottle body 2 is increased, the internal pressure of the medium bottle body 2 does not increase. Further, in this state, the gap between the bellows body 10 and the tubular shaft 14 is sealed, and the steam is not allowed to enter the interior of the bellows body 10. Next, when sending out the content liquid 24 from the liquid pumping pipe 5, that is, when sending the liquid,
When the pressing operation body 22 is pressed down, the pressing body 20 comes into pressure contact with the surface of the elastic material 15 on the upper flange portion 17 to close the tubular shaft 14, and furthermore, in this state, resists the repulsive force of the spring 19 and closes the tubular shaft. 14 is displaced and lowered, and the bellows body 10 is compressed, and the surface of the elastic material 16 on the bottom flange portion 18 and the bellows body base plate 1 are
1 are separated from each other, and air is forced into the inside of the medium bottle body 2. Next, when the pressure of the pressing operation body 22 is released, the tubular shaft 14 returns to the ventilation state, and at the same time, the bellows body 10 is inserted into the inside of the medium bottle body 2 through the gap between the surface of the elastic material 16 on the bottom flange portion 18 and the bellows body base plate 11. Return to the expanded state while inhaling air.

FIG. 2 is a sectional view of a main part of another embodiment of the present invention, in which a packing 25 is provided on the bellows movable plate 13 fixed or integrated with the tubular shaft 14, and a pressing body 20 is arranged close to this. This embodiment produces the same effects as those of the previously described embodiments.

In the present invention, there are no particular limitations on the type of air pot, the shape, structure, mounting position, or mounting means of the bellows body, liquid pump, etc., and known techniques can be appropriately selected and employed. For example, in addition to the above-mentioned embodiments, the bellows body may be one that can be attached to a known inner stopper mechanism in which a liquid pumping pipe is integrally inserted through a connecting pipe that is longer than the stroke of the tubular shaft. Alternatively, the container may be removably engaged with the inner bottle body instead of the inside of the lid body. The means for biasing the bellows body in the expansion direction is not limited to the above embodiment, and includes a case where only the elastic force of the bellows body itself is used. Also,
There are no particular restrictions on the shape or structure of the tubular shaft, the bellows body base plate and the bellows body movable plate that intersect with the tubular shaft, or the shaft sealing mechanism or valve mechanism at their intersection, or the structure of the operating part, etc., and the present invention It can be selected as appropriate within the range that can achieve the purpose.

As described above, the present invention has a relatively simple structure that simultaneously prevents steam from entering the bellows body when it is left still and prevents the pressure from increasing inside the inner bottle, which were the drawbacks of the conventional air pot technology. It is something.

[Brief explanation of the drawing]

1 and 2 are longitudinal sectional views of essential parts of an embodiment of the present invention. 1...Main body, 2...Medium bottle body, 5...Liquid lift pipe, 7
... Lid body, 10 ... Bellows body, 11 ... Bellows body base plate, 13 ... Bellows body movable plate, 14 ...
... Tubular shaft, 17 ... Top flange portion, 18 ... Bottom flange portion, 19 ... Spring, 20 ... Pressing body, 22 ... Pressing operation body, 24 ... Content liquid.

Claims (1)

[Claims for Utility Model Registration] 1. Compressing the bellows body to pressurize the inside of the medium bottle body,
In an air pot structured to send the contents to the outside of the medium bottle through a liquid lift pipe, at least (a) a bellows body urged in the direction of expansion, and (b) a bellows body that penetrates the bellows body and one of which is attached to a movable plate of the bellows body. The valve mechanism is connected to the base plate of the bellows body so that it is in a shaft-sealed state at least when standing still and when liquid is being fed, and the other is connected to the base plate of the bellows body so that it is in a shaft-sealing state and a venting state when it is standing still and when liquid is being fed, respectively. and (c) an operating part configured to close the tubular shaft during liquid feeding and to move the tubular shaft back and forth in the direction of the bellows base plate together with the bellows body movable plate. Air pot. 2. The air pot according to claim 1 of the utility model registration claim, in which the bellows movable plate is fixed or integrated with the tubular shaft. 3. The air pot according to claim 1, wherein the bellows body movable plate is pressed against the tubular shaft in the direction opposite to the bellows body base plate. 4. The air pot according to claim 1, wherein the bellows body base plate is pressed against the tubular shaft in the direction opposite to the bellows body movable plate.