JPH0632045Y2 - Metal thermos - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a metal thermos bottle manufactured by performing a brazing process in a vacuum heating furnace.

[Conventional technology]

In a conventional metal thermos bottle, for example, as shown in FIG. 10 and FIG. 11, a stainless steel outer cylinder 1 and an inner cylinder 2 are provided with a space 3 at the body and bottom to join the mouths, and a vacuum is formed. In the furnace, after the air in the space 3 is sucked and evacuated to a vacuum from the exhaust hole 5 formed in the bottom member 4 that closes the bottom of the outer cylinder 1, the exhaust hole 5 is sealed with the lid member 6 to perform a heat insulating function. Have.

The exhaust hole 5 is formed in the center of the bottom member 4 in the center of a stepped portion 7 that is recessed in the direction of the inner cylinder. In the manufacturing process, the outer cylinder 1 is placed in an inverted state in a vacuum furnace. Place an appropriate number of solid wax materials 8 on the outer peripheral bottom surface of the exhaust hole 5 of
After exhausting the air in the space 3 from the gap of the solid wax material 8, the solid wax material is heated and melted, and the lid member 6 is dropped by its own weight and sealed.

[Problems to be solved by the invention]

However, in the case of the above structure, if the depth of the step portion 7 is not large, the lid member 6 may ride on the bottom surface of the bottom member 4 when the lid member 6 is dropped, and the step portion 7 If the curvature of the corner is large, the lid member 6 may ride on the corner and the sealing may not be performed completely.

Therefore, if an attempt is made to increase the depth of the stepped portion 7, a predetermined gap is provided between the stepped portion 7 and the inner cylinder 2 so that the heat insulating effect is not impaired. Therefore, as shown in FIG. There is a problem that the distance H1 between the bottom surface of the inner cylinder 2 and the bottom surface of the bottom member 4 of the outer cylinder 1 becomes large, resulting in a thermos bottle having a total height higher than the internal volume.

Therefore, an object of the present invention is to provide a thermos having a compact structure with a low overall height as compared with the internal volume.

[Means for solving problems]

In order to achieve the above-mentioned object, the present invention provides a metal outer cylinder and an inner cylinder with a space provided in a body and a bottom, and joins and integrates them at a mouth, and air in the space is provided in a bottom member that closes the bottom of the outer cylinder. In a metal thermos bottle, which is vacuumed by sucking and exhausting from an exhaust hole and sealing the exhaust hole with a lid member, the bottom member has an annular flat portion whose outer peripheral side is connected to the outer cylinder bottom position, and the annular flat portion. A peripheral wall continuous with the inner peripheral side of the flat portion in the direction opposite to the inner cylinder, the rising end of which is located at the same height as or higher than the outer cylinder bottom end, and the exhaust hole on the inner peripheral side of the rising end of the peripheral wall. And the lid member is formed in a cup shape that covers the exhaust hole and the outer circumference of the peripheral wall.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 9.

1 to 3 show a first embodiment of the present invention,
The thermos bottle 10 made of stainless steel has an outer cylinder 11 and an inner cylinder 12 which are provided with a space 13 in the body and bottom to join the mouths, and a bottom member 14 which is joined to the inner surface of the bottom of the outer cylinder 11. The exhaust hole 15 of 14 is sealed with a lid member 16.

The bottom member 14 is continuous with the annular flat portion 14a whose outer peripheral side is connected to the bottom position of the outer cylinder 11 and the inner peripheral side of the annular flat portion 14a, and rises in the direction opposite to the inner cylinder, and the rising end portion is the outer cylinder. Peripheral wall 1 located on the inner cylinder side from the bottom end of 11
4b, and the exhaust hole 15 formed in the flat portion 14c on the inner peripheral side of the rising end of the peripheral wall 14b.

The lid member 16 includes a flat plate portion 16a that covers the exhaust hole 15,
It has a cup shape having a fitting peripheral wall portion 16b that covers the outer periphery of the peripheral wall 14b, and the flat plate portion 16a and the flat portion 14c are tightly adhered to each other with a solid wax material 17 to seal the exhaust hole 15. .

Next, FIG. 4 shows a second embodiment of the present invention. The bottom member 24 joined to the inner surface of the bottom of the outer cylinder 11 has an annular flat portion 24a whose outer peripheral side is connected to the bottom position of the outer cylinder 11. The annular flat portion 24a is continuous with the inner peripheral side and rises in the direction opposite to the inner cylinder, and the rising end is located at the same height as the bottom end of the outer cylinder 11, and the inner circumference of the rising end of the peripheral wall 24b. The exhaust hole 25 is formed in the flat portion 24c on the side. The lid member 26 includes a flat plate portion 26a that covers the exhaust hole 25 and a fitting peripheral wall portion 26 that covers the outer periphery of the peripheral wall 24b.
It is a cup shape having b, and the flat plate portion 26a and the flat portion 24c are closely adhered with a solid wax material to seal the exhaust hole 25.

5 and 6 show a third embodiment of the present invention.
The bottom member 34 integrally continuous with the bottom end of the outer cylinder 11 has an annular flat portion 34a whose outer peripheral side is connected to the bottom position of the outer cylinder 11.
And a peripheral wall 34b continuous with the inner peripheral side of the annular flat portion 34a and rising in the anti-inner cylinder direction, and the rising end of which is located on the anti-inner cylinder side of the bottom end of the outer cylinder 11, and the peripheral wall 34b.
And an exhaust hole 35 on the inner peripheral side of the rising end of the.
The lid member 36 also includes a flat plate portion 36 a that covers the exhaust hole 35.
And a fitting peripheral wall portion 36b that covers the outer periphery of the peripheral wall 34b,
Flange portion 36 formed on the outer periphery of the fitting peripheral wall portion 36b
In the shape of a cup having c, the exhaust hole 35 is sealed by tightly adhering the flange portion 36c and the annular flat portion 34a with the solid wax material 17.

FIG. 7 shows a fourth embodiment of the present invention. The bottom member 44 joined to the inner surface of the bottom of the outer cylinder 11 has an annular flat portion 44a whose outer peripheral side is connected to the bottom position of the outer cylinder 11. A peripheral wall 44b which is continuous with the inner peripheral side of the annular flat portion 44a and rises in the direction opposite to the inner cylinder, and the rising end of which is located at the same height as the bottom end of the outer cylinder 11, and the inner peripheral side of the rising end of the peripheral wall 44b. Exhaust holes 45 of the space 13 are provided in the peripheral wall 44b.
An appropriate number of notches 44d are formed so that the air inside can be easily exhausted. The lid member 46 has the same structure as the lid member 36 of the third embodiment.

Further, FIGS. 8 and 9 show a fifth embodiment of the present invention, in which the bottom member 54 integrally connected to the bottom end of the outer cylinder 11 is
An annular flat portion 54 whose outer peripheral side is connected to the bottom position of the outer cylinder 11.
a and the inner peripheral side of the annular flat portion 54a, and rises inclining in the direction opposite to the inner cylinder and inward in the radial direction, and the rising end is closer to the inner cylinder than the bottom end of the outer cylinder 11. It has a peripheral wall 54b located and an exhaust hole 55 on the inner peripheral side of the rising end of the peripheral wall 54b. Further, the lid member 56 is a cup shape having a flat plate portion 56a that covers the exhaust hole 55 and a fitting peripheral wall portion 56b that is inclined at substantially the same angle as the peripheral wall 54b so as to cover the outer periphery of the peripheral wall 54b. Peripheral wall portion 56b
And the peripheral wall 54b are closely adhered to each other by the solid wax material 17 to seal the exhaust hole 55.

With the above configuration, the distance H2 (shown in FIG. 1) between the bottom of the inner cylinder 12 and the bottom of the lid member that is the bottom of the outer cylinder 11 can be reduced without impairing the heat insulating effect. Compared to the internal capacity, it is a compact thermos with a low overall height, improving portability and storability.

Further, in the manufacturing process, when the solid wax material is melted and the lid member is dropped by its own weight, the fitting peripheral wall portion serves as a guide and closely attaches the lid member, so that a sealing failure occurs. Disappear.

[Effect of device]

As described above, according to the present invention, in a metal thermos for vacuumizing the space between the outer cylinder and the inner cylinder, the bottom member that closes the bottom of the outer cylinder has an annular flat portion whose outer peripheral side is connected to the outer cylinder bottom position, Continuing with the inner peripheral side of the annular flat portion, rising in the direction opposite to the inner cylinder,
The rising end has a peripheral wall positioned at the same height as or higher than the bottom end of the outer cylinder, and an exhaust hole on the inner peripheral side of the rising end of the peripheral wall, and the lid member that seals the exhaust hole is the exhaust gas. Since it is formed in a cup shape that covers the hole and the outer circumference of the peripheral wall, the exhaust hole formed at the center of the stepped portion that is recessed in the inner cylinder direction at the center of the conventional bottom member is sealed by the lid member. Compared with a thermos, the distance between the bottom member and the bottom of the inner cylinder can be reduced without impairing the heat insulating effect, and the total height of the thermos is low compared to the internal volume, and the thermos can have a compact structure.

[Brief description of drawings]

1 to 3 show a first embodiment of the present invention,
FIG. 1 is a front view of a metal thermos half-section in a half section, FIG. 2 is a partially enlarged sectional view showing a close contact state between an exhaust hole and a lid member, and FIG. 3 is an enlarged sectional view showing a part of a manufacturing process. The figure shows the second of the present invention
FIG. 5 is a partially enlarged sectional view showing an embodiment, FIG. 5 and FIG. 6 show a third embodiment of the present invention, and FIG. 5 is an enlarged sectional view showing a contact state between an exhaust hole and a lid member. FIG. 7 is an enlarged sectional view showing a part of the manufacturing process, FIG. 7 is a partially enlarged sectional view showing a fourth embodiment of the present invention, and FIGS. 8 and 9 show a fifth embodiment of the present invention. FIG. 8 is an enlarged cross-sectional view showing a close contact state between the exhaust hole and the lid member, and FIG. 9 is an enlarged cross-sectional view showing a part of the manufacturing process,
FIG. 10 is a half sectional front view of a conventional metal thermos, and FIG.
The figure is a partially enlarged cross-sectional view showing a state in which a conventional exhaust hole and a lid member are in close contact with each other. 10 ... metal thermos, 11 ... outer cylinder, 12 ... inner cylinder, 13 ...
Space, 14, 24, 34, 44, 54 ... Bottom member, 14
a, 24a, 34a, 44a, 54 ... Annular flat portion, 14
b, 24b, 34b, 44b, 54b ... peripheral wall, 15, 2
5, 35, 45, 55 ... Exhaust holes, 16, 26, 36, 4
6, 56 ... Lid members, 16a, 26a, 36a, 46a,
56a ... Flat plate portion, 16b, 26b, 36b, 46b, 5
6b ... Fitting peripheral wall portion

Front page continuation (72) Hidetoshi Ota 1-16-7 Nishi-Shimbashi, Minato-ku, Tokyo Within Nihon Oxygen Co., Ltd. (56) Reference JP 59-200616 (JP, A) JP 60- 222017 (JP, A) JP 61-33568 (JP, B2)

Claims (1)

[Scope of utility model registration request] 1. An outer cylinder and an inner cylinder made of metal are provided with a space in a body and a bottom so as to be joined and integrated at a mouth, and air in the space is sucked from an exhaust hole provided in a bottom member closing the bottom of the outer cylinder. In a metal thermos bottle that is evacuated to a vacuum and the exhaust hole is sealed with a lid member, the bottom member has an annular flat portion whose outer peripheral side is connected to the outer cylinder bottom position, and an inner portion of the annular flat portion. With the peripheral wall continuous with the peripheral side and rising in the direction opposite to the inner cylinder, the rising end has a peripheral wall positioned at the same height as or higher than the outer cylinder bottom end, and an exhaust hole on the inner peripheral side of the rising end of the peripheral wall, A metal thermos, wherein the lid member is formed in a cup shape that covers the exhaust hole and the outer circumference of the peripheral wall.