JPH0318447B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION According to the present invention, parts such as a handle are fixed to the outer cylinder of a metal vacuum double container (hereinafter abbreviated as vacuum container) in which a vacuum is formed between the inner and outer cylinders.

To fix parts, such as a handle, to the outer cylinder of a vacuum container such as a metal thermos flask, where the inner and outer cylinders are made of metal and the space between the double walls of the inner and outer cylinders is kept in a vacuum and vacuum insulated. Due to the need to maintain a vacuum between the inner and outer cylinders as described above, it is not possible to drill holes in the outer cylinder and attach a screw stand for fixing, and even methods such as welding and fixing do not allow the outer cylinder to be fixed. This is undesirable because it damages the inner and outer cylinders and impairs the ability to maintain a vacuum between the inner and outer cylinders.

For this reason, the following method has conventionally been adopted to attach this type of component. In other words, after vacuum sealing, surface finishing, etc., the parts are fixed to the surface of the vacuum container with solder or adhesive, and a belt-shaped or ring-shaped synthetic resin is wrapped around the outer periphery of the vacuum container. This was done by fixing the Among these methods, methods that use solder or adhesive have a limited fixing strength, and when carrying things such as hot water, the load is applied as a large load to the joints with the container, such as the handle. It is not desirable to break off these bonds. There were also problems with workability such as positioning. Furthermore, the above-mentioned method of fixing parts using an annular member or the like has the problem that the member surrounding the outer circumferential surface of the vacuum container is unstable, and the design is therefore largely controlled.

The present invention has been made with the aim of solving the above-mentioned problems. Prior to assembling the inner cylinder and the outer cylinder constituting the vacuum container, metal reinforcing plates are attached to predetermined locations on the outer peripheral surface of the outer cylinder. The body is spot welded along the surface of the outer cylinder, then the inner cylinder and the outer cylinder are assembled into a double vacuum structure, the surface of the vacuum container is polished, and the parts are welded to the reinforcing plate. It is characterized by

Embodiments of the present invention will be described below with reference to the drawings.

1 and 2 are diagrams showing an example in which the present invention is applied to a case where a handle is fixed to a metal thermos flask. In the figures, reference numeral 1 is a vacuum container of the metal thermos flask, 2 is a handle, and 3 is a This is a reinforcing plate. Next, the steps will be explained step by step.

First, before joining the inner tube 1a and the outer tube 1b, a reinforcing plate 3 made of metal is, for example, spot welded (marked with an do. The reinforcing plate 3 is desirably formed so that the shape of the surface that comes into contact with the outer tube 1b matches the surface of the outer tube 1b, and the dimensions are similar to the fixed end of the handle 2 to be welded thereto. It is preferable to set the size to be approximately the same as that of the portion 2a or to be slightly larger than that for the aesthetic appearance of the finished product. In addition, it is desirable to set the thickness of the reinforcing plate 3 as thin as possible for the purpose of polishing the surface of the vacuum container. It is set so that it can give a degree that does not cause.

Next, the space 4 between the inner cylinder 1a and the outer cylinder 1b
is evacuated and sealed to form a vacuum container 1 with a vacuum double structure.

A polishing finish is applied to the surface of the vacuum container 1. In this process, the reinforcing plate 3 is in a state of protruding from the outer peripheral surface of the vacuum container 1.
Since it is sufficiently thin, it does not substantially affect the work, and therefore it is possible to apply an automatic polishing device.

The handle 2 is welded and fixed to the reinforcing plate 3. The handle 2 is made by bending a flat metal bar member.
It has a grip part 2b made of synthetic resin in the middle part, and is welded to the reinforcing plate 3 with the fixed ends 2a at both ends in contact with the reinforcing plate 3 as shown in FIG. Ru. During this welding, the reinforcing plate 3
Although the area around the receptacle 5 is heated, the outer cylinder 1b of the vacuum container 1 has sufficient thickness together with the reinforcing plate 3 to maintain strength, so there is no opening due to buckling or melting. It never happens.

After fixing the handle 2 as described above, an excellent appearance can be achieved by polishing the receptacle portion 5 and its surrounding area as necessary.

As can be seen from the above explanation, the method of fixing parts to a metal vacuum double container of the present invention involves fixing a reinforcing plate in advance by spot welding at the position where the parts are to be attached to the surface of the outer cylinder, and then attaching the desired parts thereon. Since the parts are attached, the parts can be fixed to the vacuum container with sufficient strength. Furthermore, even if the mounting parts are fixed by welding during installation, since they are mounted on the reinforcing plate, the metal surface of the outer cylinder body is less likely to be contaminated by heating, and therefore polishing after installation can be omitted. A product with a beautiful outer cylinder surface can be obtained. Furthermore, since the reinforcing plate is fixed to the outer cylinder by spot welding, positioning is not only easy but also prevents damage to the outer cylinder. Can maintain vacuum well.

[Brief explanation of the drawing]

1 and 2 are diagrams for explaining the fixing method of the present invention, in which FIG. 1 is a partially sectional front view of a metal thermos flask to which the present invention is applied, and FIG. 2 is an enlarged view of the main part of FIG. 1. FIG. 1... Vacuum container (metal vacuum double container), 1a
...Inner cylinder, 1b...Outer cylinder, 2...Handle (parts),
3... Reinforcing plate body, 5... Receptacle part.

Claims (1)

[Claims] 1. In a method for fixing parts to the external surface of a metal vacuum double container having an inner cylinder and an outer cylinder and forming a vacuum between the inner and outer cylinders, before assembling the inner cylinder and the outer cylinder, , a metal reinforcing plate is welded to a predetermined location on the outer peripheral surface of the outer cylinder along the surface of the outer cylinder, and then the inner cylinder and the outer cylinder are assembled into a double vacuum structure, and the metal vacuum A method for fixing components to a metal vacuum double container, comprising: polishing the surface of the double container, and then welding the component to the reinforcing plate.