JPS608831Y2 - Bottom device of pot such as thermos flask - Google Patents

Description

[Detailed explanation of the idea] This invention relates to a bottom device for a pot such as a thermos flask.

In this specification, a pot includes all tabletop liquid containers with an inner container, including thermos flasks, electric heat-retaining pots, pots without a heat-retaining function, and the like.

However, in the following, in order to make the explanation easier to understand,
I will explain this using an example of a thermos flask, which is the most popular pot.

In conventional thermos flasks, the lower end of the metal bottom of the outer case has a female threaded ring body into which the male threaded body for pushing up the inner container is screwed, and a stationary structure for stabilizing the flask and reducing resistance to change direction in the stationary state. The structure and assembly are complicated,
The drawbacks were poor productivity and high costs.

In order to solve the above-mentioned problems, this invention has a female screw for a male screw for pushing up an inner container housed in the metal lower part, on the inner flange formed at the lower end of the metal lower part of the outer case. The ring body is mounted, and an appropriate number of downwardly protruding legs are provided on the female threaded ring body, and the legs are inserted through a part of the inner flange at the lower end of the outer case and protrude to the lower surface of the inner flange.

With this configuration, the legs of the female threaded ring body protrude at appropriate locations to the lower surface of the inner flange at the lower end of the outer case, are locally installed on the pot placement surface, and float the inner flange lower surface onto the pot placement surface.

Also, because the legs pass through a part of the inner tsuba,
The internally threaded ring body is prevented from rotating relative to the inner collar.

Furthermore, the reaction force for pushing up the inner container of the male threaded body pushing up the inner container screwed onto the female threaded ring body presses the female threaded ring member onto the inner flange.

This invention will be explained below based on embodiments shown in the drawings.

The metal plate exterior case 2 of the thermos 1 is composed of an upper member 2A and a lower member 2B, and an inner edge 3 is formed at the upper end of the upper member 2A, and a spout 6 of the lower spout member 5 is formed. A notch 4 is formed for this purpose.

The upper member 2A has a lower spout member 5 having a spout 6 with its upper outer edge 7 touching the inner edge 3,
In addition, the spout 6 is fitted into the notch 4 so as to be aligned therewith.

A top plate 9 having an opening 8 in the center is fixed to the upper end of the lower spout member 5, and a plurality of rectifying plates 10 are integrated into a portion of the top plate 9 that faces the bottom of the spout 6. It is formed.

A nut 1 is attached to the cylindrical male threaded portion 11 at the bottom of the lower opening member 5.
2 are screwed together, and the upper end of the annular reinforcing member 13 fitted in the lower mouth member 5 is pressed against the lower surface of the inner edge 3 by the nut 12.
By placing the reinforcing member 13 in such a state, a downward force is applied to the lower opening member 5, and its outer edge 7 is pressed against the inner edge 3.

A female thread 15 is formed on the inner surface of the hanging wall 14 of the lower mouth member 5, which is open at the portion leading to the spout 6, and a stopper 16 having a gasket 53 for closing the opening of the lower mouth member 5 is formed on the female thread 15. A male thread 17 formed in the stopper 16 is screwed into an upwardly open shell-like body 18 having the male thread 17.
, a top plate 19 screwed onto the upper part of the main body 18, and a top plate 19 screwed to the upper part of the main body 18.
8 and formed on the top plate 19.
0 and an insulating core material 21 held down by 0.

A modified U-shaped handle 22 is attached to the upper member 2A of the exterior case 2 in the following manner.

That is, through-holes 23 are formed in the upper and lower parts of the upper member 2A, and the upper and lower lateral ends of the handle 22 are placed in these through-holes 23,
A screw 25 is inserted into the screw hole 24 formed at the end of the hole 23.
They are screwed together through.

The upper end of the handle 22 is attached to the upper part of the upper member 2A, more specifically, to the upper end portion of the upper member 2A reinforced by the cooperation of the inner edge 3, the lower mouth member 5, the reinforcing member 13, etc. Therefore, compared to a conventional thermos flask in which the upper end of the handle 22 is attached to the lower upper member 2A using the nut 12, the strength of the attachment of the handle 22 can be increased.

A female threaded ring 27 is fitted into the lower end of the upper member 2A, and the female threaded ring 27 is held by an inward upward edge 26 formed by bending the lower end of the upper member 2A inward.

A step 28 for receiving the lower end of the upper member 2A is formed at the upper part of the lower member 2B, which forms the exterior case 2 together with the upper member 2A, and is formed rising from the inner end of the step 28. A male threaded portion 29 is screwed into the female threaded ring 27 and integrated with the upper member 2A.

The lower part of the upper member 2A and the female threaded ring 2 fitted therein
7 has a through hole 32 on the required side, and the through hole 32
Since a through hole 33 of a size corresponding to the inner diameter of the screw 34 is formed in the male threaded portion 29 so as to face the screw 34, the screw 34 can be inserted through the through hole 32 in the same manner as using a tapping screw. By forcibly screwing into the hole 33, the male threaded portion 29 is prevented from loosening with respect to the female threaded ring 27, in other words, the lower member 2B is prevented from coming off from the upper member 2A.

Note that it is of course possible to form the upper member 2A and the lower member 2B as one piece.

The lower member 2B has a curved surface that curves smoothly inward,
An inwardly bent inner collar 36 is formed at the lower end of the inner collar 36, and a female threaded ring body 38 having a female threaded portion 39 and housed in the lower member 2B is attached to the outer peripheral side of the inner collar 36. It is mounted on an annular leg 40 that is integrally formed, and an annular groove 41 is formed on the lower surface of the annular leg 40 into which a rising annular wall 36a formed following the inner edge of the inner collar 36 is fitted. At the same time, through holes 35 are protruded from the ceiling of the groove 41 at equidistant positions on the circumference, and upward claws 36b protruding from several places on the upper end of the annular wall 36a are inserted into the through holes 35 from below to form an annular shape. By bending the leg 40 toward the upper surface, the female threaded ring body 38 is crimped onto the upper surface of the inner collar 36.

The lower surface of the annular leg 40 is further integrally formed with downwardly directed small protruding legs 37 at equidistant positions on the circumference, and each of the small protruding legs 37 is drilled into the inner collar 36 at equidistant positions on the circumference. It is fitted into the through hole 42 and protrudes from the lower surface of the inner flange 36.

The fit between the small protruding legs 37 and the holes 42 firmly prevents the internally threaded ring body 38, which is press-fitted to the upper surface of the inner collar 36, from rotating, and is strongly integrated with the inner collar 36.

The fit between the claw 36b and the through hole 35 does not have a sufficient function of preventing the internally threaded ring body from rotating due to the weak torsion resistance of the claw 36b, and there is no need to do so.
It is enough to crimp it on top of 6.

Therefore, the through hole 35 is just an escape hole for the claw 36b, and a tight fit is not required, and it may be crimped to the inner collar 36 without such a fit.

Preferably, an odd number of three or more small protruding legs 37 are formed in order to ensure the safety of the thermos flask 1.

The female threaded portion 39 of the female threaded ring body 38 is screwed with a male threaded portion 44 of a male threaded body 43 for pushing up an inner container in the shape of a cylinder with a bottom. A recess 45 is formed in the upper part of the inner container supporting edge 4.
6 is formed, and the inner container 47 housed in the outer case 2 is supported by the supporting edge 46, and the inner container 47 can be inserted into the recess 45 of the male threaded body 43 by inserting a tool into the male threaded body 43.
By rotating it, it is pushed upward, so its mouth part is shaped like an inverted cross section.
8 and is pressed against the lower mouth member 5.

On the other hand, as a reaction when the inner container 47 is pushed up and its mouth is pressed against the lower mouth member 5 via the gasket 48, a downward force acts on the female threaded ring body 3B, causing the female threaded ring body 38 to press against the inner flange 36. will be strongly pressed.

Even though this is the final stage of assembly, the internally threaded ring body 38 is strongly crimped to the inner collar 36, and although it is crimped by the claws 36b, it is firmly secured by the fit between the small projection legs 37 and the holes 42. The inner container 47, the male threaded body 43, and the female threaded ring body 38 can be fixed all at once by one operation of tightening and rotating the male threaded body 43.

A heat insulating material 49 is wrapped around the body of the medium container 47.

At the upper part of the outer peripheral surface of the male threaded body 43, there is a stopper 5 on the required side.
0 is formed, and the stopper 50 is connected to the male threaded body 4.
3 into the female threaded ring body 38 from above, the male threaded body 43 contacts the upper end surface of the female threaded ring body 38, and the male threaded body 43
This is to prevent the threaded ring body 3B from being screwed into the female threaded ring body 3B or being pulled out and falling below the female threaded ring body 38.

51, 52, and 54 are reinforcing ribs formed at each part of the female threaded ring body 38.

Note that the structure for crimping the internally threaded ring body 38 to the inner collar 36 may vary depending on the shape of the ring body 38, the number and shape of the small protruding legs 37, the degree of protrusion of the open legs 37 to the lower surface of the inner collar 36, etc. It is not limited to the example, and can be designed in various ways.

According to this invention, the legs formed on the internal threaded ring body for pushing up the inner container and the male screw threading on the inner flange at the lower end of the outer case protrude at appropriate places to the lower surface of the inner flange, and are locally grounded on the pot placement surface. Therefore, the special stationary structure can stabilize the pot without any members, reduce the resistance to change the orientation of the pot in the stationary state, and make the pot easier to use.

Furthermore, since the legs lift the inner flange above the pot placement surface, it is possible to eliminate contact damage with the pot placement surface over the entire lower surface of the inner flange at the lower end of the outer case.

Furthermore, the female threaded rings are prevented from rotating each other by inserting the legs into the inner flange, and are pressed against the inner flange by the reaction force caused by the male container pushing up male screw, so there is no need for a special coupling structure. It is integrated and securely assembled into the inner flange, and together with the fact that no special stationary structure is required, the structure and assembly are simple and can be provided at low cost.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing an embodiment of this invention, and FIG. 2 is an exploded perspective view of the bottom portion. 1... Thermos flask, 2... Exterior case, 2
A...Upper member, 2B...Lower member,
35...Through hole, 36...Inner tsuba, 36
b...Upward claw, 37...Double-purpose small protruding leg, 38...Femally threaded ring body, 40...Annular leg, 42... Hole, 43...Medium container push-up male screw body, 47...Medium container.

Claims (4)

[Scope of utility model registration request] (1) Place the internal threaded ring body for the male threaded screw for pushing up the inner container housed in the metal lower part on the inner flange formed at the lower end of the metal lower part of the outer case, A bottom device for a pot such as a thermos flask, which has an appropriate number of protruding legs, and the legs are inserted through a part of an inner flange at the lower end of an outer case to protrude to the lower surface of the inner flange. (2) The bottom device for a pot such as a thermos flask as set forth in claim 1 of the utility model registration claim, wherein the legs are downwardly directed minute protrusions. (3) The bottom device for a pot such as a thermos flask according to claim 1 or 2, wherein the leg insertion portion of the inner flange is a through hole. (4) The internally threaded ring body is crimped onto the upper surface of the inner flange by bending upward claws formed on the inner edge of the inner flange, as described in any one of claims 1 to 3 of the utility model registration claims. The bottom device of a pot such as a thermos flask.