JPH0436766Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a lid for an air pot that extracts liquid from a container using compressed air generated by pressing a bellows built into the lid.

BACKGROUND ART The conventional lid of this type of air pot has a guide tube 1 formed on the upper surface of the outer lid, as shown in, for example, Japanese Utility Model Publication No. 61-26436, as shown in FIG. a presser cover 2 slidably inserted into the guide tube 1; a locking member 3 fitted to the outer periphery of the guide tube 1; and a guide tube composed of the guide tube 1 and the presser cover 2. 8 and the bellows 4 to be pressed, the upper circumferential surface of the bellows 4 is covered with the upper plate 5, and the upper inner flange 7 of the bellows 4 is provided on the upper surface of the outer flange 6 of the upper plate 5. Fixed by sonic welding etc. to maintain airtightness,
The air inside the bellows 4 was then forced to be fed by pressing the presser cover 2.

Problems to be Solved by the Invention In such a conventional configuration, ultrasonic welding is generally used to secure the bellows 4 and the upper plate 5. However, if this welding is to be performed reliably,
It is necessary to adjust the welding conditions, for example, to lengthen the welding time, increase the welding pressure, and increase the amplitude of the ultrasonic waves. As shown by A (imaginary line), the protrusion may protrude inward to a large extent, and due to variations in the wall thickness of the inner flange 7, large variations may occur in the amount of protrusion. When the air inside the bellows 4 is pumped by the bellows 4, the inward protrusion of the inner flange 7 comes into contact with the lock member 3, making it impossible to press the bellows 4 smoothly. In addition, in order to enable smooth pressing operation, it is necessary to have a large dimensional margin, but in this case, the diameter of the bellows 4 increases and the projected area increases, so the pressing operation force increases. etc., there were problems in terms of operability.

This invention solves these problems,
To provide a lid for an air pot that requires only a small pressing force and enables smooth operation.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention has an inner cylinder part formed to hang down from the upper surface of the lid body, a pusher mounted in the inner cylinder so as to be able to rise and fall freely, and a pusher for the pusher. It has a bellows that is pushed by a pressing operation to forcefully transport air inside, and an upper plate that is cylindrical with a bottom and has an outer flange in the outer circumferential direction of the upper end, and the upper surface of the outer flange of the upper plate and the inner flange of the bellows. a rib that is closely attached to the outer flange of the upper plate by welding, and that faces the inner peripheral end of the inner flange of the bellows, which is close to the outer periphery of the inner cylindrical part of the lid when the upper plate moves up and down. was formed.

Effect By having the above configuration, when the upper surface of the outer flange of the upper plate and the inner flange of the bellows are brought into close contact with each other by ultrasonic welding, etc., the inward protrusion of the inner flange of the bellows is reduced to the upper surface of the outer flange of the upper plate. This can be prevented by the provided ribs, and as a result, when the pusher is used to pump air inside the bellows, the inner flange of the bellows will not protrude and come into contact with the inner cylindrical part of the lid body, resulting in smooth operation. becomes possible. Also,
It is also possible to eliminate the need to strictly control welding conditions due to contradictory factors: welding conditions for reliable welding and welding conditions for reducing the amount of protrusion. Furthermore, since there is no need to provide an unnecessarily large dimensional margin, the diameter of the bellows can be made small, and the projected area can also be made small, so that the pressing operation force can be made small.

Embodiment Hereinafter, an embodiment of the present invention will be described based on the accompanying drawings. In FIGS. 1 and 2, reference numeral 11 denotes a pot body containing a container, and a lid 12 is pivotally supported on the body 11 so as to be openable and closable.
An inner cylinder 13 is formed to hang down from the upper surface. A push body 14 is mounted inside the inner cylinder 13 so as to be able to move up and down, and a lock plate 15 is fitted to the outer periphery of the inner cylinder 13.
2 is formed. Reference numeral 16 denotes a bellows for pumping the internal air into the container by raising and lowering the pushing body 14. This bellows 16 has openings at the top and bottom, and an inner flange 18 is formed in the upper opening. 17
19 is a lid cover that covers the lower part of the lid 12; 19 is an upper plate; this upper plate 19 has a cylindrical shape with a bottom and has an outer flange 20 in the outer circumferential direction of the upper end; Ribs 21 are formed. And this top plate 19
The upper surface of the outer flange 20 and the lower surface of the inner flange 18 of the bellows 16 are welded and brought into close contact by ultrasonic welding or the like. The rib 21 of the upper plate 19 is formed at a position facing the end of the inner flange 18 of the bellows 16 which is close to the inner cylindrical part 22 of the lid body 12 when the upper plate 19 moves up and down. On the other hand, the lower opening of the bellows 16 is welded to the lid cover 17.

In the above configuration, when the pushing body 14 is pressed, the bellows 15 is pressed through the upper plate 19, so the air inside the bellows 15 is forced into the container, causing the liquid inside the container to flow out. be. Further, as is clear from the above structure, in this embodiment, since the ribs 21 are formed on the upper surface of the outer flange 20 of the upper plate 19, the outer flange 20 of the upper plate 19 and the inner flange 18 of the bellows 16 are The inward protrusion of the inner flange 18 during welding is due to the outer flange 20 of the upper plate 19.
This can be prevented by the ribs 21 formed on the top surface, and as a result, it is possible to weld the welding without causing any protrusion. The dimensional margin with respect to the inner diameter of the cylindrical portion 19 is not reduced, and smooth pressing operation is possible. In addition, since there is no need to consider protrusion, there is no need to strictly control welding conditions when setting contradictory welding conditions such as reliable welding and welding with little protrusion, and as a result, productivity can be greatly improved. Furthermore, since there is no need to provide an excessive dimensional margin between the outer diameter of the lock plate 15 and the inner diameter of the cylindrical portion of the upper plate 19, the diameter of the bellows 16 can be reduced, and as a result, the projected area can also be reduced. Therefore, the operating force for air pressure feeding can be reduced.

Effects of the Invention As is clear from the above embodiments, the present invention includes an inner cylindrical part that is formed to hang down from the top surface of the lid, a pusher that is installed in the inner cylindrical part so as to be able to rise and fall freely, and a bottomed cylindrical shape that extends in the direction of the outer periphery of the upper end. an upper plate having an outer flange at the top; and a bellows having an inner flange at the upper opening and which is pushed by the pressing operation of the pushing body to pump air inside; the outer flange of the upper plate and the bellows The inner flange of the bellows is closely attached by welding, and a rib is provided on the upper surface of the outer flange of the upper plate, facing the end of the inner flange of the bellows that is close to the outer peripheral surface of the inner cylindrical part of the lid body when the upper plate moves up and down. Therefore, when the upper surface of the outer flange of the upper plate and the inner flange of the bellows are brought into close contact by welding, the inner flange of the bellows can be prevented from protruding inward by the ribs of the upper plate, and as a result, , it is possible to weld without sticking too much, and since the inner flange of the bellows does not protrude and come into contact with the inner cylindrical part of the lid when pressing the pusher, it can be performed smoothly, and the welding conditions can be strictly controlled. Since there is no need to do this, productivity can be greatly improved.Furthermore, since there is no need to provide extra dimensional allowance than necessary, the diameter of the bellows can be reduced, and as a result, the pressing operation force can also be reduced. It is something.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a main part of the lid of an air pot showing an embodiment of the present invention, Fig. 2 is a side view of the air pot showing a section of the lid, and Fig. 3 is a conventional air pot. FIG. 12... Lid body, 13... Inner cylinder, 14... Push body, 16... Bellows, 18... Inner tsuba, 19...
Upper plate, 21...rib, 22...inner cylinder part.

Claims (1)

[Scope of utility model registration request] An inner cylindrical part is formed to hang down from the top surface of the lid body, a pushing body is mounted inside this inner cylindrical part so as to be able to rise and fall freely, and the outer flange is raised and lowered in conjunction with the movement of the pushing body and has a bottomed cylindrical shape in the direction of the outer circumference of the upper end. and a bellows, which has an inner flange at the upper opening and which is pushed by the pressing operation of the pushing body to pump the air inside, and the upper surface of the outer flange of the upper plate and the inner flange of the bellows. The flange is closely attached to the flange by welding, and the upper surface of the outer flange of the upper plate is opposite to the inner peripheral end of the inner flange of the bellows that is close to the outer periphery of the inner cylindrical part of the lid body when the upper plate moves up and down. The lid of the air pot has ribbed edges.