JPH0769385A - Heat insulative container - Google Patents

Abstract

PURPOSE:To decrease deformation due to welding by a method wherein a fitting part is formed at two ends of a cylindrical body, a connecting means is formed in a short cylinder, and a plurality of cylindrical bodies are fitted and connected to each other through the connecting means. CONSTITUTION:A small-sized heat insulative container is formed by fitting a lid 16 to each of two fitting parts 2 of one main body 1. A connecting means 10 is arranged between the ends of two main bodies 1, with the connecting means 10 fitted to the fitting part 2 of one mainbody 10 and also to that of the other mainbody 1, whereby the two mainbodies 1 are connected mutually. Then a lid 16 is fitted to the fitting part 2 on one opening side of the one mainbody 1 and another lid 16 is fitted to the fitting part 2 on the other opening side of the other mainbody 1. As a result, a large-sized heat insulative container 24 formed of two mainbodies 2 can be made easily. Thus, according to this method, a plurality of mainbodies 1 can be connected only by fitting them by means of a connecting means 10 into a large-sized heat insulative container, which can be protected from deformation largely in comparison with that made according to the conventional method in which the container has been formed integrally by welding.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat insulating container for keeping the internal temperature constant, and more particularly to a large heat insulating container.

[0002]

2. Description of the Related Art Conventionally, an example of this type of heat insulating container is disclosed in Japanese Patent Laid-Open No. 4-266696.
That is, the heat insulating container is a bottomed box having an inner box and an outer box. The opening of this heat insulating container is closed with a lid. A sealed vacuum heat insulating portion is formed between the inner box and the outer box. Usually, the vacuum heat insulating portion is filled with a filler as a supporter. In addition, thin plates of austenitic stainless steel (mainly SUS304) are usually used for the inner and outer boxes.

[0003]

However, in the above conventional type, austenitic stainless steel (mainly S
The thin plate of US304) is easily distorted by welding, and the filler is not a rigid body. Therefore, when a large heat insulation container is manufactured by integral welding, distortion occurs due to welding in the inner box or the outer box, and the manufacturing accuracy deteriorates. There was a problem.

The present invention solves the above problems, and an object of the present invention is to provide a heat insulating container capable of reducing distortion caused by welding.

[0005]

In order to solve the above problems, in the heat insulating container according to the present invention, fitting portions are formed at both ends of a cylindrical body, and a lid body and a joined body are selectively formed in these fitting portions. And the joined body is formed into a short tubular shape and fitted over the fitting portions of the two main bodies, and the main body, the lid and the joined body are formed into a double sealed structure having an inner wall and an outer wall, respectively. The heat insulating portion is provided between the inner wall and the outer wall.

[0006]

According to the above construction, for example, a joint body is arranged between the end portions of two main bodies, and the joint body is fitted to the fitting portion of one body and also to the fitting portion of the other body. Thereby, the two main bodies can be joined by the joined body. Similarly, a plurality of main bodies are joined by a joined body, and a lid body is fitted to the fitting portions of the end portions of the main body located at both end portions, whereby a large heat insulating container can be formed. As described above, since a plurality of completed main bodies can be fitted and joined to each other via the joined body, distortion can be reduced as compared with the case where a large heat insulating container is integrally formed by welding. Further, by changing the number, shape, size, etc. of the main bodies to be joined, it is possible to easily form a variety of heat insulating containers having different sizes.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. As shown in FIGS. 2 and 3, reference numeral 1 denotes a rectangular tubular main body, and fitting portions 2 are formed at both ends of the main body 1. These fitting portions 2 are formed by an inner wall side end plate 3, an outer wall side end plate 4, and a support plate 5. Further, the main body 1 has an inner wall 6 and an outer wall 7, and both ends of the inner wall 6 and the outer wall 7 are sealed by the inner wall side end plate 3, the outer wall side end plate 4 and the support plate 5. There is. As a result, the main body 1 has a double sealed structure, and the vacuum heat insulating portion 8 is formed between the inner wall 6 and the outer wall 7. The vacuum heat insulating portion 8 is filled with heat insulating filler.

As shown in FIG. 4, the inner wall side end plate 3 is formed.
Is formed in a rectangular frame shape extending in the cross-sectional direction of the main body 1,
It is attached to the outer circumference of both end edges of the inner wall 6. Further, the outer wall 7 is formed shorter than the inner wall 6, and the outer wall side end plate 4 is formed.
Like the inner wall side end plate 3, is formed in a rectangular frame shape extending in the cross-sectional direction of the main body 1, and is attached to the inner periphery of both end edges of the outer wall 7. Further, the support plate 5 is formed in a rectangular tube shape which is arranged at a distance from the inner wall 6 to the outside, one end of which is attached to the outer edge of the inner wall side end plate 3 and the other end of which is the outer wall side end plate 4. It is attached to the inner edge of. Then, as shown in the example of FIG. 4, the outer wall side end plate 4 can be formed in a bellows shape that can expand and contract in the same direction following the thermal expansion and contraction of the inner wall 6. Further, the gap W1 between the inner wall 6 and the support plate 5 is formed to be narrower than the gap W2 between the inner wall 6 and the outer wall 7, so that the fitting portion 2 is formed as a step portion that is depressed from the outer wall 7 to the inner wall 6 side. ing.

The outer wall 7 and the inner wall 6 are thin plates of austenitic stainless steel (mainly SUS304) (plate thickness 1).
~ 2 mm) is used. Further, the inner wall side end plate 3, the outer wall side end plate 4, and the support plate 5 have a thinner plate thickness (0.5 to 1 m) in order to avoid becoming a heat bridge.
m) austenitic stainless steel (mainly SUS30
4) is used.

As shown in FIGS. 2 and 5, reference numeral 10 is a fitting-type joined body for joining a plurality of main bodies 1 to each other. The joined body 10 has an inner wall 11 and an outer wall 12, and is formed in a short rectangular tube shape. Both ends of the inner wall 11 and the outer wall 12 are sealed by the end plates 13, and thus the joined body 10 has a double sealing structure. A vacuum heat insulating portion 14 is formed between the inner wall 11 and the outer wall 12, and the vacuum heat insulating portion 14 is filled with a heat insulating filler. As shown in FIG. 1, the joined body 10 is removably fitted over the fitting portions 2 of the two main bodies 1 formed as stepped portions. In the illustrated example, the outer wall of the joined body 10 is in the fitted state.
12 is flush with the outer wall 7 of the body 1.

As shown in FIGS. 2 and 6, reference numeral 16 is a fitting type lid. The lid 16 is composed of an inner wall 17 and an outer wall 18, and has a quadrangular frame portion 19 at the peripheral edge. This frame part 19
The end of the lid is sealed by the end plate 20, which allows the lid 16
Has a double sealed structure. A vacuum heat insulating portion 21 is formed between the inner wall 17 and the outer wall 18, and the vacuum heat insulating portion 21 is filled with a heat insulating filler. The lid body 16 is attached to the main body 1 by fitting the frame portion 19 to the fitting portion 2. In the example in the figure, the lid is
The outer wall 18 of 16 is flush with the outer wall 7 of the body 1. As a result, one of the joint body 10 and the lid body 16 can be selectively fitted into one fitting portion 2.

The operation of the above structure will be described below.
As shown in FIG. 7, a small heat insulating container 23 can be formed by fitting the lids 16 to the fitting portions 2 of the main body 1 respectively.

Further, as shown in FIG. 1, a large heat insulating container
When forming 24, the joined body 10 is provided between the ends of the two main bodies 1.
And the joined body 10 is fitted with the fitting portion 2 of one body 1.
And the fitting portion 2 of the other body 1 as well. As a result, the two main bodies 1 are joined together to form a joined body
Can be joined with. The lid 16 is fitted to the fitting portion 2 on the one end opening side of the one body 1, and the lid body is also fitted to the fitting portion 2 on the other end opening side of the other body 1.
Fit 16 together. As a result, a large heat insulating container 24 including the two main bodies 1 is easily formed.

Similarly, as shown in FIG. 8, a larger heat insulating container 25 is easily formed by joining a larger number of main bodies 1 to each other with the joined body 10. in this way,
Since a plurality of main bodies 1 can be fitted and joined to each other via the joined body 10, distortion can be reduced as compared with the case where a large-sized heat insulating container is integrally formed by welding as in the related art. This improves the accuracy during manufacture.

Further, since the main body 1 and the joined body 10 are fitted to each other in a sufficiently overlapped state, heat loss from the fitting portion 2 is reduced. Similarly, the main body 1 and the lid
Since 16 are fitted with each other in a sufficiently overlapped state, heat loss from the fitting portion 2 is small.
The support plate 5 is formed to have a sufficient length in order to create a sufficiently overlapped state as described above.

By joining the main body 1 with the joined body 10, heat insulating containers of various sizes can be manufactured using the same main body 1. As a result, the number of types of parts can be reduced, and the cost of the heat insulating container can be reduced.

When the inside of the heat insulating container thus formed has a high temperature, the inner wall 6 of the main body 1 thermally expands, while the outer wall 7 hardly thermally expands, as shown in FIG. This difference in thermal expansion is absorbed by the outer wall side end plate 4 formed in a bellows shape. That is, as shown by the phantom line in FIG. 4, when the inner wall 6 thermally expands in both end directions, the outer wall side end plate 4 follows the inner wall 6 via the inner wall side end plate 3 and the support plate 5. The inner wall 6 extends in the expansion direction. Thereby, the deformation due to heat can be smoothly absorbed, and the thermal stress can be sufficiently reduced.

In the above embodiment, when the fitting portion 2 of the main body 1 is fitted in the joint body 10, the support plate 5 of the main body 1 comes into surface contact with the inner wall 11 of the joint body 10 and the end surface of the outer wall 7 of the main body 1. Comes into contact with the end plate 13 of the joined body 10. As a result, the main body 1 is accurately positioned with respect to the joined body 10, and the displacement when a plurality of main bodies 1 are joined can be reduced.

Next, another embodiment of the present invention will be described with reference to FIGS. That is, the partition body 32 that partitions the inner space of the bonded body 31 is continuously provided on the inner peripheral surface of the bonded body 31. According to this, as shown in FIG. 11, a plurality of main bodies 1 can be joined by the joined body 31 to form a large heat insulating container 33. At this time, the inside of the heat insulating container 33 is divided by the partition body 32 into a plurality of pieces. It is divided into 34 rooms. Further, by selectively using the joined body 10 (see FIG. 5) in the above-described embodiment and the joined body 31 (see FIG. 9) in another embodiment,
You can change the size of 34.

In the above-described embodiment, as shown in FIG. 4, the outer wall side end plate 4 is formed into a bellows shape which can expand and contract in the same direction following the thermal expansion and contraction of the inner wall 6, but as shown in FIG. The inner wall side end plate 3 may be formed in a bellows shape, or, as shown in FIG. 13, the support plate 5 may be formed in a bellows shape.

[0021]

As described above, according to the present invention, since a plurality of completed main bodies can be fitted and joined to each other via the joined body, a large heat insulating container can be integrally formed by welding as in the conventional case. The strain can be reduced as compared with the case of forming. This improves the accuracy during manufacture. Further, by changing the number, shape, size, etc. of the main bodies to be joined, it is possible to easily form a wide variety of heat insulating containers having different sizes.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a heat insulating container according to an embodiment of the present invention.

FIG. 2 is a perspective view of a main body, a joint body, and a lid body that form a heat insulating container.

FIG. 3 is a sectional view of a main body.

FIG. 4 is a detailed view of a fitting portion.

FIG. 5 is a cross-sectional view of a joined body.

FIG. 6 is a cross-sectional view of a lid body.

FIG. 7 is a cross-sectional view of a heat insulating container formed from one body.

FIG. 8 is a side view of a heat insulating container formed from a plurality of main bodies.

FIG. 9 is a cross-sectional view of a joined body according to another embodiment of the present invention.

FIG. 10 is a partially cutaway perspective view of a joined body according to another embodiment.

FIG. 11 is a cross-sectional view of a heat insulating container formed using the bonded body of another example.

FIG. 12 is a detailed view of a fitting portion according to another embodiment.

FIG. 13 is a detailed view of a fitting portion according to another embodiment.

[Explanation of symbols]

 1 Main body 2 Fitting part 6,11,17 Inner wall 7,12,18 Outer wall 8,14,21 Insulation part 10,31 Joined body 16 Lid body 23,24,25,33 Insulated container

Claims (1)

[Claims] 1. A fitting portion is formed at both ends of a tubular body, and a lid and a joined body are selectively fitted into these fitted portions, and the joined body is formed into a short tubular shape.
The main body, the lid, and the joined body are fitted to each other over the fitting portions of the two main bodies to form a double sealed structure having an inner wall and an outer wall, respectively, and a heat insulating portion is provided between the inner wall and the outer wall. Insulated container characterized by.