JPH0353930B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a heat-insulating container, such as a portable pot, that utilizes a double vacuum container made of metal.

BACKGROUND OF THE INVENTION Conventionally, the mainstream of such heat-retaining containers has been one in which the double-walled metal vacuum container itself is exposed as is.

However, in order to reduce cost and weight, the metal plates that make up the double-walled metal vacuum container are made thinner, and the appearance quickly deteriorates, such as by denting when it hits something else. There are many things.
Furthermore, if the metal vacuum double container itself is exposed, there is a lack of decorativeness and variation in decoration.

Problems to be Solved by the Invention In order to solve the above problems, it is conceivable to house and hold the metal vacuum double container in an outer case.

However, if we adopt the conventional structure of housing and holding a double vacuum container made of glass inside an exterior case, it is difficult to use a double vacuum container made of metal, which has extremely greater strength than a double vacuum container made of glass. The structure becomes unnecessarily complicated and unsuitable for storing and holding containers.

For this reason, there is a need for a simple holding structure suitable for achieving the initial purpose of storing and holding a metal vacuum double container in an outer case.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention includes a shoulder member forming a shoulder, and a container member connected to the shoulder member to form a body and a bottom. In a heat insulating container housing a metal vacuum double container in an exterior case, the bottom of the heavy container is caused to engage in the radial direction with a protrusion integrally formed on the bottom of the container member, and the container portion A curved portion having a curved shape protruding inward is formed at the bottom of the vacuum double container, and this curved portion is elastically applied to the bottom of the vacuum double container to hold the vacuum double container between the shoulder member and the container member. It is characterized by the fact that

According to the above configuration of the present invention, the shoulder member is fitted into the mouth of the metal vacuum double container from above, the container member is fitted from the bottom of the metal vacuum double container,
If the shoulder member and the container member are connected, the metal vacuum double container can be housed in the outer case formed by the shoulder member and the container member, and upon completion of the connection, the metal vacuum double container is The shoulder member and the protrusion that engages in the radial direction on the bottom of the container member fully fit together, and the curved portion of the bottom of the container member elastically presses the bottom against the shoulder member, so that It is also firmly held in the radial direction.

Embodiment A first embodiment shown in FIGS. 1 and 2 will be described. The first embodiment shown in FIG. 1 and FIG. ,6
(FIG. 2), the joint 5 between the lower end of the body 4a of the outer wall 4 and the bottom plate 7 is the final joint to be joined within the vacuum space. This final joint 5
is welded by irradiating a laser beam 11 in a vacuum space 9 (FIG. 1) with the flange 4b at the lower end of the outer wall trunk 4a and the annular groove 7a on the outer periphery of the bottom plate 7 fitted together. Joint part 5 before welding
presents an annular gap that communicates between the double walls 3 and 4 and the outside, and the space between the double walls 3 and 4 is evacuated by communication with the vacuum space 9 in which the container body 1 is placed. This evacuation is easily, quickly and fully achieved through the large diameter annular gap.

Welding of the joint 5 in the vacuum space 9 is performed by irradiating the joint 5 with a laser beam 11 while rotating the container 1 around its axis 10 within the vacuum space 9, as shown in FIG. This is done by melting the joining member. The laser beam 11 is emitted from a laser beam generator 12 and irradiated through a condenser lens 13 to locally raise the temperature of the joint 5 to the melting temperature of the joining member in a short period of time. After the joining members are melted, when the irradiation of the laser beam 11 is stopped, the temperature of the joining part 5 decreases and solidifies, completing the welding. When welding is performed with the brazing material 8 added to the joint 5, the brazing material 8
It melts during the initial stage of welding and remains molten even after welding, entering the corners and gaps of the weld and solidifying.

The outer wall 4 of the container body 1 has a simple mouth shape and a simple lower end shape, and may be a simple one made by forming a flat plate into a cylindrical shape with an appropriate mouth and bottom shape and welding it in the vertical direction. . However, depending on the shape of the mouth, the outer wall 4 may be formed by dividing it in the middle and joining 15 as shown by the imaginary line 14 in FIG. The inner wall 3 may also be formed by being divided at the portion indicated by the imaginary line 16 and joined 17, or the inner and outer walls 3 and 4 may be continuous at the mouth. In short, the container body 1 can be formed by separately forming arbitrary parts of the inner and outer walls 3 and 4 and joining them, and at least one part of the joint part is in a vacuum space for creating a vacuum between the inner and outer walls 3 and 4. It may be a welded joint at.

A downward elastic engagement portion 18 is provided on the outer periphery of the mouth of the container body 1.
is provided in an annular shape or as a partial tongue,
The engaging portion 18 is elastically engaged in the shoulder 19a of the synthetic resin outer case and suspended, and the elastic contact portion 22 in the direction of the axis 10 is connected to the synthetic resin outer case main body 19b fitted 20 to the shoulder 19a. , and an axis-perpendicular contact portion 23 are formed at the bottom of the main body 19b. The contact portion 22 is a dome-shaped raised portion that is pressed against the lower surface of the bottom plate 7, and the contact portion 23 is a plurality of protrusions that engage with the inner circumference 7b of the rear surface of the groove 7a forming portion on the outer periphery of the bottom plate 7. To prevent swinging of the bottom of the container 1 suspended by the mouth inside the container. 21 is vessel 1
This is a seal packing interposed between the mouth portion and the mouth portion 19c of the shoulder 19a. 24 is a stopper, and 25 is an outer lid.

The joints other than the joints in the vacuum space 9 may be welded or other joints that can maintain airtightness even by final joining in the vacuum space.

In the case shown in FIG. 3, a flange plate 31 is fitted into the inner periphery of the lower end of the body 4a of the outer wall 4, and welded joints 32
The bottom plate 7 is fitted from below into the inner circumferential recess 31a of this flange plate 31, and welded together 33 to facilitate attachment of a brazing material in a vacuum space.A portion 4c of a slightly smaller diameter is provided at the lower end of the body 4a. , a contact part 34 which is an annular protrusion on its outer periphery, and a plurality of rib-like contact parts 35 which abut each part of the contact part 34 from the circumference in the direction perpendicular to the axis at the lower end of the inner periphery of the outer case main body 19b.
each formed.

In the case shown in FIG. 4, a protruding contact portion 36 is formed at the bottom of the outer case body 19a to abut each part of the inner circumference of the joint 32 between the lower end of the outer wall body 4a and the flange board 31 in the direction perpendicular to the axis. There is. The contact portion 36 exerts the same steady rest effect even when it is brought into contact with the annular protrusion 31a of the flange board 31, as shown by the imaginary line.

In the case shown in FIG. 5, a rib-like contact portion 37 that abuts each portion of the straight lower end outer periphery of the outer wall trunk portion 4a in the direction perpendicular to the axis is formed at the inner periphery lower end portion of the outer case body 19b.

Effects According to the present invention, the shoulder member is fitted into the mouth of the metal vacuum double container from above, the container member is fitted from the bottom of the metal vacuum double container, and the shoulder member and the container member are coupled. Then, the metal vacuum double container is housed in the outer case formed by the shoulder member and the container member, and when the connection is completed, the metal vacuum double container is engaged in the radial direction between the shoulder member and the bottom of the container member. The exterior is fully fitted into the mating protrusions, and the bottom is pressed upward by the curved portion of the bottom of the container member and pressed against the shoulder member, so that it is firmly held in both the axial and radial directions. No special members are required other than those forming the case, and assembly can be done simply by joining these two essential parts together and fitting the metal vacuum double container at that time. Can be provided at low cost.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of the bottom welding state when manufacturing a double-walled metal vacuum container used as a heat-insulating container of the present invention, and Fig. 2 shows a heat-insulating container as an example to which the present invention is applied. The sectional views and FIGS. 3 to 5 are partial sectional views showing different modifications, respectively. 1... Vessel (metal vacuum double container), 19...
Exterior case, 19a...Exterior case shoulder (shoulder member),
19b...Exterior case body (container member), 22...
...Elastic contact part (curved part), 23... Axis-perpendicular contact part (protrusion), 35... Rib-like contact part (protrusion), 3
6... Protrusion-like contact portion (protrusion), 37... Rib-like contact portion (protrusion).

Claims (1)

[Scope of Claims] 1. A thermal insulation device in which a metal vacuum double container is housed in an exterior case consisting of a shoulder member forming a shoulder portion and a container member connected to the shoulder member to form a body portion and a bottom portion. In the container, the bottom of the vacuum double container is radially engaged with a protrusion integrally formed on the bottom of the container member, and a curved portion is formed in the bottom of the container member in a curved shape that protrudes inward. A heat-retaining container characterized in that the curved portion is elastically applied to the bottom of the vacuum double container to hold the vacuum double container between the shoulder member and the container member.