JPS607822A - Dual-mouth vacuum double heat insulating container and production thereof - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] The present invention has a vacuum insulation layer, can efficiently keep the contents hot and cold with the vacuum insulation layer, and has a simple structure and is easy to manufacture. The present invention relates to a heat insulating container and a method for manufacturing the same.

BACKGROUND ART Conventionally, a metal thermos flask having a structure as shown in FIG. 1 has been known as an insulating container that has a vacuum insulation layer and is durable and convenient to handle. This metal thermos flask is made of, for example, stainless steel, and is constructed by welding together five press-worked members. That is, the metal thermos shown in the figure includes a cylindrical outer barrel body member 1a constituting an outer ml, an outer barrel cap part @'l'b, a bottomed cylindrical outer barrel bottom member lc, and an inner barrel 2. An internal body member 2a that constitutes
The cylindrical bottom member 2b is welded and joined to form a double bottle, and a vacuum hole 3 is formed at the bottom of the outer support member 1c of the double bottle. It is manufactured to be sealed properly.

By the way, as mentioned above, this metal thermos has a large number of parts and must be joined to the bath at four locations (welded parts): A, B, and CSD, which increases the number of man-hours and increases costs. Moreover, since there are many welded parts, there is a low probability that leakage will occur due to poor welding, causing a decrease in yield.

In addition, the metal thermos mentioned above has one spout (spout), an inner container (inner vJ2) into which the contents are directly poured, and a main body (inner vJ2).
Since the outer part 1) is integrated, there are problems in handling such as difficulty in cleaning the inside of the inner container, and the scope of application is also limited.

Furthermore, if a heating element or a heat storage element is attached to the bottom of the inner cylinder in order to increase heat retention, the structure becomes complicated and more man-hours are required. In addition, the design will be limited each time, and the design will be a fixed one.This invention was made in view of the above type ↑y, and its purpose is to have high heat-retaining ability and be able to be used for multiple purposes. ,
The object of the present invention is to provide an insulating container that has a simple structure, can be easily manufactured, and is inexpensive, as well as a method for manufacturing the same.
Two pipes with different diameters are used to form a cylindrical vacuum double tube with a thermal layer formed between each pipe, and one opening of the double vacuum tube with a low thermal conductivity is formed between the two pipes with different diameters. By closing the container with a member and fitting an appropriately shaped inner container inside the container, it is possible to easily manufacture a heat-insulating container that has a high heat-retaining ability and can be used for multiple purposes.

The present invention will be explained below with reference to the drawings. FIG. 2 shows a first embodiment of a dual-role empty double-bottle bottle 12 insulated container according to the present invention. This heat-insulating container includes a double vacuum tube 10, an outer plug Hi+ that closes the bottom opening 10a of the double vacuum tube 10, and an inner container 12 inserted and fixed into the double vacuum tube 10. and the opening 12 of this inner container 12
a and an outer plug 13 fixed to the upper opening 10b of the double-ended vacuum cylinder 10, and the inner container 1
A thread S is formed on the inner circumferential surface of the 20 opening portion 12a, so that the inner plug 14 can be attached thereto.

The double vacuum cylinder 10 is formed into a cylindrical double wall structure, and a vacuum insulation layer 10e is formed between the inner wall 10c and the outer wall 10(l). ,
As shown in FIG. 3, a straight large-diameter pipe 15 that constitutes the outer wall portion 10a and the inner wall portion 1
Straight small diameter pipe 1 that will constitute 0c
Manufactured from 6. In the example of Figure 3, the values are, first, the large diameter]
(Leave Eve 15 as it is, and leave Kuibu 16 on the small path)
Both ends 16a, 16b of the pipe 15 are uniformly expanded in diameter so that the outer diameter thereof becomes approximately equal to the inner diameter of the large diameter pipe 15. The length of the small diameter nozzle 16 before diameter expansion is set so that the length after the diameter expansion process is equal to the length of the large diameter pipe 15. The small diameter pipe 16 whose diameter has been expanded in this way is transferred to the large diameter pipe 1.
5, and bring both ends into close contact with each other. Both end portions brought into close contact in this manner are joined by welding or brazing to form a double cylindrical tube 17. A hole 17a for vacuuming in the outer wall (large diameter pipe 15) of the double front 17 on both days.
to be drilled. Subsequently, on both days, the pipe 17 is placed in a vacuum furnace, the hole 17a is sealed with a sealing plate 18, and the pipe 15 is placed between the large diameter pipe 15 and the small diameter pipe 16. A double-ended vacuum cylinder 10 like this is formed by forming a vacuum insulation layer 10o to complete the above-mentioned double-ended vacuum cylinder 1O.
According to the manufacturing method of
Only one pipe each (small diameter σ) (eve 16, sealing plate 18) is required, and each pipe 15 and 16 has excellent dimensional accuracy using a pipe making machine, etc., and can be easily mass-produced without leakage. Compared to stamped parts made by pressing, which are the constituent materials of the pipes (7), there are cost advantages such as less unnecessary material (scrap) and cheaper materials.In addition, the joints between each pipe 15 and 16 are made at both ends. Part σ) requires only 2 parts, and furthermore, this overlapped end face structure f) has the advantage that joining is easier than joining other structures, and the probability of leakage occurring in the finished product is low.

In addition, in the above-mentioned double-ended vacuum cylinder lO, the small diameter
The diameter of both ends of the pipe 6 is enlarged, and the large diameter pipe 15 is left as it is so that they fit into each other, but as shown in FIG. The other end 15b of the large-diameter pipe 15 may be reduced in diameter and fitted together.Alternatively, as shown in FIG. Both ends 15a and 15b of the pipe 15 having the same diameter may be reduced in diameter and joined together.Furthermore, in each pipe, the end portions may be reduced or enlarged in diameter, but the center may be formed by bulge processing. The diameter of the portion may be increased or decreased.

Further, in the above manufacturing method, the vacuum insulation layer 10.0 was formed using the evacuation hole 17a and the sealing plate 18, but as shown in FIG.
The vacuum-cut PA layer ioe may be formed by sealing the chip tube 19 in a vacuum furnace.

Furthermore, as shown in FIG. 5(b), the vacuum hole 17a is not provided in the large-diameter pipe 15, but in the small-diameter pipe 15.
It may be provided at the end of the If you do this,
In order to compensate for the deterioration in appearance caused by the sealing plate 18, it is possible to avoid the need to enhance the outer wall of the completed double-sided vacuum cleaner 10 with a decorative member or the like.

In the dual vacuum cylinder 10 obtained in this way, the valve plug resistor 11 is made of plastic, paper, etc., as shown in FIG.
It is made of a material with low thermal conductivity, such as wood, and is fitted into the bottom opening 10a at one end of the dual vacuum tube 10.

And inside the double tube 10, the forest and dae are made of plastic.
An inner container 12 made of a material with low thermal conductivity and high moldability, such as paper, into a bottle shape, and a rib 12b formed on the bottom so as to be in contact with the valve stopper bottom 11 in a small area.
It stores.

Further, the valve plug 13 is made of the same material with low thermal conductivity as the valve plug bottom 11, and is fitted into the upper opening 10b of the double vacuum double filO. The mouth portion 12a of the inner container 12 is fixedly fixed to the portion 13a.

As described above, a thread S is formed on the inner circumferential surface of the mouth portion 12a of the inner container 120, so that the inner plug 14 can be attached thereto.

Through the above manufacturing and assembly operations, the manufacturing of the two-day vacuum double insulation container is completed.

In this heat-insulating container, the inner container 12 is made of the same material as a normal container, so it is easy to mold, and the inner plug 14
In addition, a thread is not formed on the double vacuum station 10 for screwing the inner plug 14, but a thread is formed on the mouth 12a of the inner container 12, which is easy to process. It is easy to manufacture, and the manufacturing cost can be kept low. In addition, the inner container 12 is surrounded by a double vacuum tube 10 with high heat and cold retention properties, and the recess 12a is reliably sealed by the inner stopper 4, so that the contents can be kept inside. It is possible to maintain the temperature at a constant level for a long time.

In addition, the insulated container of the present invention can be easily disassembled into the double-sided vacuum surface 10, the valve plug bottom 11, the inner container 12, and the valve plug 13, so that the inner container 12 can be easily cleaned. It is convenient to replace, and if the inner container 12 is formed into a wide-mouth bottle shape and the shape of the valve stopper 13 is changed to match, it can be used not only in a thermos flask, but also in a thermos jar, etc., expanding the range of uses. becomes possible.

In the above embodiment, the 1fJr heat vessel of the present invention is cylindrical, but if the large-diameter pipe and small-diameter pipe made of m-component material are made into multifaceted cylindrical pipes, various shapes can be formed. The appearance and the shape of the contents storage chamber can be obtained.

FIG. 6 shows a second embodiment of the heat insulating container according to the present invention, and in the figure, parts common to those in FIG. 2 are given the same reference numerals to simplify the explanation. Reference numeral 20 in the figure indicates a valve stopper, and a recess 20a is formed in the center of the valve stopper 20, which opens upward (inwardly in the vacuum double direction 10 on both sides). A heating element 217!1''-v is placed in the recess 20a. As described above, the valve plug bottom 20 can be relatively easily removed from the two-day vacuum duplex fIJ 10. It is possible to use a simple heating element such as a disposable heating element (commercial product name: Hocalon) or a pocket burner.

Further, the inner container 22 placed on the valve stopper 20 in the double-bottomed valve 10 is formed in almost the same shape as the inner container 12 in FIG. Peripheral ribs 22a and 22b are formed. These replies 22a
, 221) are in contact with the inner circumferential surface of the double-ended vacuum duplex 10, and divide the space between the inner container 22 and the double-ended vacuum duplex 10 into a large number of spaces. Therefore, the heat convection caused by the heat from the heating element 21 and the heat from the contents in the inner container 22 is completed within each small nitrogen space and does not grow large, so the inner container 22 is provided. The insulated container can further improve heat and cold retention.

The heating element 21 is provided for the main purpose of supplementing the heat escaping to the outside through the space between the double-ended vacuum tube 10 and the inner container 22. When the heat is actively used to heat the contents, it is desirable that the inner container 22 be made of a highly thermally conductive material such as metal. Further, if the purpose is simply to supplement heat, a heat storage body may be provided in place of the heating element 21.

FIG. 7 shows a third embodiment of the heat insulating container according to the present invention, and parts in common with those in FIG. 2 are given the same reference numerals to simplify the explanation. Reference numeral 23 in the figure indicates a radiation prevention material, and this radiation prevention material 23 consists of an intermediate layer 23a made of a material with high emissivity such as aluminum foil, and an outer layer made of a material with low conductivity such as paper. It is composed of three layers: 23'b and 23c, and has a double vacuum cylinder lO and an inner container 12.
and is provided so as to surround the inner container 12.

Therefore, in the heat insulating container of this embodiment, the radiation prevention material 23 prevents the transfer of heat due to radiation generated between the double-ended vacuum double direction lO and the inner container 12. This results in better heat and cold retention than an insulated container.

As explained above, the present invention forms a cylindrical double-ended vacuum double cylinder 14 with a vacuum insulation layer formed between each pipe from two pipes with different diameters, and The manufacturing method involves closing one opening with a low thermal conductivity material and fitting an appropriately shaped inner container inside, and the insulated container obtained by this method has high heat-retaining ability and can be used for multiple purposes. It has a simple structure and can be easily manufactured in a wide variety of shapes.
Furthermore, an inexpensive heat-insulating container can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional configuration diagram showing an example of a heat insulating container having a conventionally known vacuum heat insulating layer, and Figs. 2 to 7 are for explaining the present invention. FIG. 3 is a partially sectional side view showing a first embodiment of a double-ended vacuum insulated container with both ends; FIG. a) (bl is a ~f-plane configuration diagram showing a modified example of the vacuum double cylinder on both days, Fig. 5 (al (
bl is a cross-sectional configuration diagram for explaining a modified example of the method of forming a double-sided vacuum insulation layer at both ends, and FIG. 6 shows a second embodiment of the double-sided vacuum insulation container according to the present invention. FIG. 7 is a partially cross-sectional side view showing an example of w, 3 of the heat-insulating container. lO... Double vacuum tube for both days, 10a... Cap opening,
10b...Top opening, 10c...Inner wall, 10a
...outer prefecture, 10θ...vacuum, heat collapse, 11.20
...Valve stopper paper, 12.22...Inner container, 12a...
Mouth part, 13...Valve stopper, 15...Large diameter pipe, 15
a, 15b... end, 16... small diameter pipe, 16
a, 161)... end, 17... both [] double,
17a... Hole for vacuuming, 18..." 1st plate,
19...Tip tube. Applicant Nippon Sanso Co., Ltd. - Figure 4 18 1'/a 1f5 Figure 5 1m Figure 7 1m

Claims (2)

[Claims] (1) A cylindrical double-ended double-ended vacuum tube with a vacuum insulation layer between its inner wall and outer wall is equipped with a fixed inner container for storing contents for keeping warm or cold inside. A double-ended vacuum double insulated container. (2) Both ends or one end of a large-diameter pipe are reduced to a predetermined inner diameter, or both ends or one end of a small-diameter pipe are expanded to a predetermined outer diameter, and the large diameter Fit the small diameter pipe into the pipe, fit both ends of the pipe together, and connect both ends to the air layer to form a double pipe, and the large diameter of the double pipe. A vacuum cross-sectional layer is formed between the pipe and the small-diameter pipe, thereby forming a double vacuum tube, and an outer plug made of a material with low thermal conductivity is attached to one opening of the double vacuum tube. Attach the bottom, fit the inner container to store the contents for keeping warm or cold inside this double-ended vacuum cylinder,
Thereafter, the opening of this inner container is fixed to the other opening of the vacuum double cylinder through an outer plug made of a material with low thermal conductivity. Method of manufacturing a heat-insulating υ vessel.