JP2003310450A - Heat-insulated double container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat-insulated double container wherein the vibration of the heat-insulated double container is prevented from occurring without decreasing the hot-keeping function of the heat-insulated double container, and also, the number of parts is reduced. <P>SOLUTION: This heat-insulated double container is equipped with an external cylinder, an internal cylinder which is housed in the external cylinder and integrated with the external cylinder by welding the upper ends to each other, and an oscillation-preventing member which prevents the internal cylinder from oscillating. Then, a gap which is formed by the external cylinder and the internal cylinder is vacuumized. In the heat-insulated double container, the oscillation- preventing member is projected under a non-contact state with the external cylinder, from a hole provided on the bottom part of the external cylinder on the external surface of the bottom part of the internal cylinder. Then, the projected part is covered with a bottom cap, and the hole on the bottom part of the external cylinder is utilized as a vacuumizing/exhausting port. Then, the hole on the bottom part of the external cylinder is sealed with the bottom cap for the heat-insulated double container. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat-insulating double container made of metal, and more particularly to a heat-insulating double container made of metal to which vibration preventing means is added.

[0002]

2. Description of the Related Art Currently, a metal insulated double container is a pot,
It is used in various fields, including products such as lunch jars, stainless steel bottles, stainless steel mahbo bottles, and warm cooking pots. In this heat-insulating double container, an outer cylinder made of stainless steel and an inner cylinder, which is smaller than the outer cylinder and is also made of stainless steel, are housed in the outer cylinder, and the upper openings of the outer cylinder and the inner cylinder are integrated by welding. At the same time, the space formed in the outer cylinder and the inner cylinder is evacuated, which is excellent in heat retaining effect and highly convenient.

However, such a heat-insulating double container is one in which only the upper openings of the outer cylinder and the inner cylinder are integrated by welding. For example, when strong vibration is applied to this heat-insulating double container,
The inner cylinder oscillates left and right with the upper opening as a fulcrum in the outer cylinder, and the welded portion of the upper opening sometimes breaks.

As a solution to such a problem, the invention of utility model registration No. 2601123 has been proposed. This is shown in FIG. The insulated double container is the outer cylinder 1,
It is formed from the inner cylinder 2 and the bottom member 3. The outer cylinder 1 is a stainless steel cylindrical member having an upper end opening edge portion 1a at its upper portion and an opening at its lower end, and a bottom member 3 separately provided at its lower end.
The outer peripheral ends of the two are welded together to be integrated to form a bottomed container.

Further, the inner cylinder 2 is a bottle-shaped member having an upper end opening edge portion 2a at its upper part, and is one size smaller than the outer cylinder 1 and is also made of stainless steel. The inner cylinder 2 is inserted from the open lower end, and the upper opening edge portions 1a and 2a of the outer cylinder 1 and the inner cylinder 2 are welded to integrate them. Then, the bottom member 3 is inserted into the lower end open portion of the outer cylinder 1, and the outer peripheral ends of the bottom member 3 are welded to each other to form a double container.

Reference numeral 5 is an anti-vibration member, which is composed of a substantially flat collar portion 5b and a cross-shaped cross-shaped member 5a provided upright on the collar portion 5b. The collar portion 5b is fixed to the bottom of the inner cylinder 2. In addition, the tip of the cross-shaped member 5a is projected to the outside from the bottom member opening 3a provided in the bottom member 3, and the four outer peripheral ends of the cross-shaped member 5a are aligned with the bottom member opening 3a. Being touched. And the bottom member opening 3a
The protruding portion protruding further outward is sealed by a bottom cap 6 attached and fixed to the outer surface portion of the bottom member 3.

A vacuum exhausting tip 7 having a vacuum exhausting port 7a at its tip is attached to the bottom member 3 separately from the bottom cap 6. Then, after the inner cylinder 2 is set in the outer cylinder 1, the air in the space 4 between the outer cylinder 1 and the inner cylinder 2 is exhausted from the vacuum exhaust port 7a at the tip of the vacuum exhaust tip 7, and the space 4 is vacuumed. After that, the vacuum exhaust port 7a is sealed to form an adiabatic double container. With this structure, even if the heat insulating double container vibrates strongly, the four outer peripheral ends of the cross-shaped member 5a of the vibration preventing member 5 are in point contact with the bottom member opening 3a. 2 is prevented from vibrating in the outer cylinder 1.

However, in the heat-insulating double container, the heat-retaining function is particularly important, but in the conventional heat-insulating double container, the cross-shaped member 5a and the bottom member opening 3a are in point contact with each other, so that vibration is prevented. Although the function is particularly excellent, heat escapes from the contact portion between the cross-shaped member 5a and the bottom member opening 3a, and its heat retaining function is deteriorated.

Further, in the conventional vibration preventing member 5, since the four outer peripheral ends of the cross member 5a are brought into point contact with the bottom member opening 3a, it can be said that there is almost no space between them. During assembly of the heat-insulating double container, after inserting the inner cylinder 2 into the outer cylinder 1 and welding the upper opening edge portions 1a and 2a of the inner and outer cylinders 1 and 2, respectively, the bottom member 3 is opened to the lower end of the outer cylinder 1. In the case of inserting into a portion, if the shaft center of the cross member 5a and the shaft center of the bottom member opening 3a are slightly eccentric, there is a problem that the insertion cannot be smoothly performed, and accuracy is required for assembly. And it took time.

Furthermore, in order to exhaust the space 4 between the inner and outer cylinders 1 and 2, it is necessary to separately provide a vacuum exhausting tip 7 on the bottom member, which increases the production cost.

[0011]

SUMMARY OF THE INVENTION The present invention is to solve the above-mentioned problems, and more specifically, to prevent vibration of the heat insulating double container without lowering the heat retaining function of the heat insulating double container,
Moreover, it aims at providing the heat insulation double container which reduces the number of parts.

[0012]

In order to achieve the above object, the present invention adopts the following configuration.

In the invention according to claim 1, the outer cylinder, the inner cylinder housed in the outer cylinder and integrated with the outer cylinder by welding the upper ends of the outer cylinder, and the vibration of the inner cylinder are prevented. In an adiabatic double container comprising a vibration prevention member and vacuumizing a space formed by the outer cylinder and the inner cylinder, a hole provided with the vibration prevention member on the outer cylinder bottom portion on the outer surface of the inner cylinder bottom portion. A structure in which the outer cylinder is projected in a non-contact state, the protruding portion is covered with a bottom cap, the hole of the outer cylinder bottom is used as a vacuum exhaust port, and the hole of the outer cylinder bottom is sealed by the bottom cap. . Further, since the vibration prevention member is brought into a non-contact state with the bottom portion of the outer cylinder, the heat retaining function is not deteriorated, the vibration of the inner cylinder can be prevented, and the assembly thereof is simple and easy. Furthermore, the number of parts can be reduced by using the hole at the bottom of the outer cylinder used for projecting the vibration prevention member as a vacuum exhaust port.

According to a second aspect of the invention, in addition to the structure of the first aspect, the inner diameter of the bottom cap is smaller than the hole of the bottom portion of the outer cylinder. With such a configuration, even if the vibration prevention member is eccentrically attached, it can be easily inserted into the hole in the bottom of the outer cylinder, and the gap between the outer diameter of the vibration prevention member and the inner diameter of the bottom cap can be minimized. Since it can be made smaller, the vibration prevention function is enhanced.

According to a third aspect of the present invention, in addition to the constitutions of the first and second aspects, after the bottom cap is attached, an end portion of the bottom cap comes into contact with the outer cylinder to prevent the bottom cap from vibrating. A structure that is not in contact with any member. With such a configuration, the heat retaining function is not deteriorated, the vibration of the inner cylinder can be suppressed, and the assembly thereof is simple and easy.

In the invention according to claim 4, the outer cylinder, the inner cylinder housed in the outer cylinder and integrated with the outer cylinder by welding the upper ends of the outer cylinder, and vibration of the inner cylinder are prevented. A heat-insulating double container comprising a vibration prevention member, wherein a space formed by the outer cylinder and the inner cylinder is evacuated, and a recess is provided in the inner cylinder bottom portion, and the vibration prevention member is provided on an inner surface of the outer cylinder bottom portion. And a bottom cap provided with a vacuum exhaust port is mounted, the vibration preventing member is desired in the recess in a non-contact state, and the vacuum exhaust port provided in the bottom cap is sealed with a sealing material.
With such a configuration, the heat retaining function is not deteriorated, the vibration of the inner cylinder can be suppressed, and the assembling thereof is simple and easy. Furthermore, the number of parts can be reduced by using the hole at the bottom of the outer cylinder used for projecting the vibration prevention member as a vacuum exhaust port.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) FIG. 1 shows a heat insulating double container according to a first embodiment of the present invention. The heat insulating double container 10 has a form as shown in the schematic diagram, and is used in various fields including products such as pots, lunch jars, stainless bottles, stainless steel maho bottles and heat-retaining cooking pots.

Explaining the heat insulating double container 10, the heat insulating double container 10 includes an outer cylinder 11, an inner cylinder 12 and a bottom member 13.
Formed from. The outer cylinder 11 is a vertically open stainless steel cylindrical member having a small-diameter upper end opening edge portion 11a at its upper portion and a large-diameter lower end opening edge portion 11b at its lower end, and a separate body at its lower end. The bottom member 13 is formed by welding the opening edges of the bottom member 13 to each other and integrating them.

The inner cylinder 12 is made of stainless steel like the outer cylinder 11 and has an upper end opening edge 11a of the outer cylinder 11 on the upper part thereof.
The main body 12c is a bottle-shaped member having an upper end opening edge 12a having a slightly smaller diameter. The main body 12c having a circular cross section is one size smaller than the outer cylinder 11, and the main body 12c is set inside the outer cylinder 11.
A gap D is formed between the outer surface of the outer cylinder and the inner surface of the outer cylinder 11. Further, the bottom of the inner cylinder 12 forms a curved surface projecting downward, and a ring-shaped rib 12b projecting downward is formed in the center of the bottom of the inner cylinder 12 to serve as positioning when attaching a vibration preventing member 15 described later. It

The bottom member 13 includes an outer cylinder 11 and an inner cylinder 12.
Is a disk-shaped member made of stainless steel and having a plurality of concavo-convex concavo-convex portions similarly to the above, and has a hook-shaped end portion 13a bent from the upper side to the lower side at its outer peripheral end, and a vibration-preventing member 15 described later at the center thereof. And a circular vacuum exhaust port 13d having a function for exhausting the air in the void 14 described later is formed, and a circular vacuum exhaust port 13d is formed around the circular vacuum exhaust port 13d. The concave portion 13b is formed, and the flange portion 16b of the bottom cap 16 described later is brought into contact with the concave portion bottom surface 13c which is the outer surface of the concave portion 13b.

Reference numeral 15 denotes a vibration preventing member, which is a cylindrical body 15a forming a main body of the vibration preventing member, and the cylindrical body 15a.
And a supporting member 15b serving as a leg portion for fixing the lower end of the inner cylinder 12 to each other. The supporting member 15b is a low-height cylindrical member having a large-diameter upper opening and a small-diameter lower opening. Of the vibration preventing member 1 by welding the inner peripheral end of the lower opening of the upper end and the upper outer peripheral end of the tubular body 15a into one body
5 is formed. The upper opening end 15c, which is the large-diameter upper opening of the support member 15b, is integrally attached to the outer surface of the bottom portion of the inner cylinder 12 by welding. The diameter of the upper opening end 15c is set at the bottom portion of the inner cylinder 12. The ring-shaped rib 12b is slightly larger in diameter than the ring-shaped rib 12b, and is placed and welded so that the upper opening end 15c is located outside the rib 12b. That is, the rib 12b is used as a positioning member. Although the cylindrical body 15a and the support member 15b are described as separate bodies here, they may be integrated.

Next, the outline of the assembly of the heat insulating double container 10 will be described step by step. First, the outer cylinder 11,
The inner cylinder 12 and the bottom member 13 are processed into respective shapes by drawing, and the upper opening end 15c of the vibration prevention member 15 is placed outside the rib 12b formed in the lower part of the inner cylinder 12,
In addition, they are integrated beforehand by welding. In that case, the inner cylinder 1
It is attached so that the axis of 2 and the axis of the vibration preventing member 15 are aligned or parallel to each other.

Next, the inner cylinder 12 is inserted into the outer cylinder 11 from below the outer cylinder 11, the upper end opening edge portions 11a and 12a of the both cylinders 11 and 12 are brought into contact with each other, and then the upper end opening edge portions 11a and The two cylinders 11 and 12 are integrated by welding 12a together. In that case, when welding is performed so that the axial centers of both cylinders 11 and 12 are not displaced, welding is performed with a spacer for preventing displacement interposed between both cylinders 11 and 12.

Thereafter, the bottom member 13 is inserted into the lower end opening edge 11b of the outer cylinder 11 so that the hook-shaped end 13a which is the outer peripheral end of the bottom member 13 contacts the lower end opening edge 11b of the outer cylinder 11. Then, the lower end opening edge 11b of the outer cylinder 11 and the hook-shaped end 13a of the bottom member 13 are integrated by welding. After welding, the vibration prevention member 15 attached to the bottom of the inner cylinder 12
Although the cylindrical body 15a of the cylindrical body 15a projects downward from the vacuum exhaust port 13d provided in the center of the bottom member 13, the outer diameter of the cylindrical body 15a is smaller than the diameter of the vacuum exhaust port 13d. The outer surface of the body 15a and the inner peripheral edge of the vacuum exhaust port 13d are not in contact with each other.

Thereafter, the space 14 formed between the cylinders 11 and 12 is evacuated, and the process is performed as follows. That is, the heat insulating double container 10 is carried into the vacuum chamber in an inverted state. In that case, the bottom cap 16 is covered in the recess 13b provided in the center of the bottom member 13 in such a manner as to cover the cylindrical body 15a of the vibration preventing member 15 protruding outward and the vacuum exhaust port 13d.

The bottom cap 16 will now be described. The bottom cap 16 is made of stainless steel and has a bottomed cylindrical portion 1.
6a and a collar portion 16b, which is a tubular body with a bottom and has a bottom, and the bottom member 13 is placed in the recess 13b such that when the heat-insulating double container 10 is in an inverted state, the surface below the collar portion 16b is the bottom member. It is performed in such a form that it abuts on the bottom surface 13c of the recess 13 above the recess 13b. At that time, a plurality of brazing materials made of metal are interposed between the lower surface of the collar portion 16b and the concave bottom surface 13c, that is, the lower surface and the upper surface of the collar portion 16b. Between the bottom surface 13c of the
When the air gap 14 between the first and the second air gaps 12 is exhausted, a gap serving as an air exhaust passage in the air gap 14 is maintained, and the adiabatic double container 10 is carried into the vacuum chamber in this state. When the heat-insulating double container 10 is loaded into the vacuum chamber, the heat-insulating double container 10 shakes due to vibration, but since the bottom cap 16 is accommodated in the recess 13b of the bottom member 13, the bottom cap 16 is It is prevented from slipping off or coming off.

When the heat insulating double container 10 is carried into the vacuum chamber, the vacuum chamber is evacuated. Then, both cylinders 11, 1
The air in the space 14 between the two is also the vacuum exhaust port 13d of the bottom member 13.
Also, the air is exhausted through the gap between the lower surface of the flange portion 16b formed of the brazing material and the upper surface of the recessed portion bottom surface 13c. In order to satisfactorily evacuate the space 14 during this evacuation, a plurality of holes 15d are provided at substantially equal intervals on the outer peripheral portion of the cylindrical body 15a of the vibration prevention member 15.

Explaining the function of the hole 15d,
The outer surface of the cylindrical body 15a of the vibration prevention member 15 and the bottom cap 1
The clearance d between the inner cylindrical surface of the bottomed tubular portion 16a of 6 and the inner surface of the side portion is as narrow as possible in order to enhance the vibration prevention effect, for example, about 0.5.
mm, which is very narrow, and the gap d between both sides is the same.
Where the vibration prevention member 15 is eccentrically attached to the bottom portion of the inner cylinder 12, the outer surface of the tubular body 15a and the bottomed tubular portion 16a of the bottom cap 16 can be removed. The gap d with the inner surface of the side portion has a wide portion and a narrow portion (may be zero) on the entire outer circumference, and in such a case, the exhaust in the void 14 toward the narrow portion is more and more. Although it becomes difficult and the exhaust efficiency of the entire void 14 is lowered, the adverse effects can be prevented by providing the hole 15d.

When the exhaust of the space 14 between the two cylinders 11 and 12 is completed, the heating step is started and the adiabatic double container 10 is heated at the melting temperature of the brazing material or higher. Then, the brim 16b
The brazing material interposed between the lower surface and the concave bottom surface 13c is melted and spreads between both surfaces. Then, since the bottom cap 16 is positioned by the recess 13b of the bottom member 13, at a predetermined position, the lower surface of the collar 16b and the upper bottom surface 13c of the recess are melted through a brazing material film. Since they come into contact with each other, the bottom cap 16 completely seals the vacuum exhaust port 13d and keeps the voids 14 in both cylinders 11 and 12 in a vacuum state if natural cooling is performed in the same state. Reference numeral 17 is a getter previously attached to the inner surface of the upper wall of the outer cylinder 11 by a support fitting 18, which adsorbs the gas generated in the closed void 14 and prevents the degree of vacuum in the void 14 from decreasing. It is for.

After the above-mentioned processing, a heat insulating double container having a vacuum in the void 14 is formed, and a vibration preventing member 15 is formed.
Of the outer surface of the cylindrical body 15a and the bottomed cylindrical portion 1 of the bottom cap 16
The inner surface of the side portion 6a is not in contact with the inner surface of the side portion 6a, and the gap d is formed to have a predetermined width, for example, about 0.5 mm. Of course, this gap d is made smaller than the gap D between the outer cylinder 11 and the inner cylinder 12.

Therefore, even if the heat insulating double container 10 vibrates and the inner cylinder 11 tries to vibrate in the outer cylinder 11 with the upper end opening edge portion 12a as a fulcrum, the inner cylinder 11 only slightly sways to prevent vibration. The outer surface of the tubular body 15a of 15 comes into contact with the inner surface of the side portion of the bottomed tubular portion 16a of the bottom cap 16, and further vibration of the inner tube 11 can be prevented. Further, since the vibration prevention member 15 and the bottom cap 16 are not in contact with each other at normal times, when hot water is poured into the inner cylinder 12 (at that time, the upper end opening edge 12a of the inner cylinder 12 is covered. Therefore, heat does not escape from the bottom cap 16 via the vibration preventing member 15 by conduction.

Further, since the vacuum exhaust port 13d for exhausting the space 14 between the two cylinders 11 and 12 is also used as the hole for projecting the vibration preventing member 15 from the bottom member 13, it is necessary to separately provide the vacuum exhaust port 13d. Therefore, the production cost can be reduced accordingly.

FIG. 2 shows a modification of the one shown in FIG. That is, in the structure shown in FIG. 1, the length of the cylindrical body 15a of the vibration preventing member 15 is increased and the cylindrical body 16a of the bottom cap 16 is extended to the vicinity of the bottom inner surface of the cylindrical body 16a. By setting the length as shown in FIG. 1, when the inner cylinder 12 vibrates, the contact area between the outer surface of the cylindrical body 15a and the side inner surface of the bottomed cylindrical portion 16a of the bottom cap 16 becomes larger. Becomes
The vibration prevention effect is improved. However, the insulated double container 10
When a hot liquid is put into the inner cylinder 12 of FIG. 1, the inner cylinder 12 expands depending on the amount and temperature of the liquid, and in FIG. 1, the lower end of the cylindrical body 15a of the vibration prevention member 15 and the bottom cap 16 are covered.
The bottomed cylindrical portion 16a may come into contact with the inner surface of the bottom portion, and the one shown in FIG. 2 prevents such an adverse effect.

That is, the length of the cylindrical body 15a of the vibration prevention member 15 is reduced to about 1/3. With such a structure, even if the vibration prevention effect is somewhat reduced, the inner cylinder 12 extends and the cylindrical body 15 of the vibration prevention member 15 is reduced.
It is possible to reliably prevent an adverse effect that the lower end portion of a and the inner surface of the bottom portion of the bottomed tubular portion 16a of the bottom cap 16 come into contact with each other.

(Second Embodiment) FIG. 3 shows a vibration preventing member for a heat insulating double container according to a second embodiment of the present invention.
Since the entire structure of the heat insulating double container 10 is common to that of FIGS. 1 and 2, detailed description thereof will be omitted.

The heat insulating double container 10 includes an outer cylinder 11 and an inner cylinder 12.
And the bottom member 13, and the assembly thereof is almost the same as that of FIGS. 1 and 2, and the difference is the structure of the vibration preventing member.

That is, an inwardly projecting recess 20 is formed in the bottom of the inner cylinder 12, a large-diameter opening 22 is provided in the center of the bottom member 13, and the opening is formed on the inner surface of the center of the bottom member 13. The bottom cap 21 is provided so as to straddle the hole 22. Further, the bottom cap 21 has a collar 21 at the lower end.
b, the cylindrical portion 21a at the center and the vibration preventing protrusion 21 at the upper portion
c is an integrally formed member made of stainless steel,
The brim portion 21b is integrally attached to the inner surface of the bottom cap 21 by welding so as to straddle an opening 22 provided in the center of the bottom member 13.

Further, the vibration preventing projection 21c provided on the upper surface of the bottom cap 21 is provided in a ring shape on the upper side, and a vacuum exhaust port 21e is formed at the center thereof. Then, the recess 20 at the bottom of the inner cylinder 12 and the vibration preventing projection 2
1c is in a non-contact state, and the gap d between the recess side surface 20a of the recess 20 and the projection side surface 21d of the vibration preventing projection 21c is formed to have a predetermined width, for example, about 0.5 mm, and The gap d is smaller than the gap D between the outer cylinder 11 and the inner cylinder 12.

In this embodiment, the bottom member 13 is previously prepared.
After the bottom cap 21 is welded to the inner surface of the above, the hook-like end portion 13a of the bottom member 13 is welded to the lower end opening edge portion 11b of the outer cylinder 11. After the air gap 14 is exhausted from the vacuum exhaust port 21e in the vacuum chamber, the vacuum exhaust port 21e is sealed with a brazing material to form the heat insulating double container 10.

When such adiabatic double container 10 vibrates, the inner cylinder 12 tries to vibrate with the upper end opening edge portion 12a as a fulcrum, but the concave side surface 20a of the concave portion 20 is the projection side surface of the vibration preventing projection 21c. Since it immediately contacts 21d and does not shake further, vibration is effectively prevented. In addition, since the inner cylinder 12 and the vibration preventing protrusion 21c are not in contact with each other, heat does not escape due to conduction.

(Third Embodiment) FIG. 4 shows a vibration preventing member for a heat insulating double container according to a third embodiment of the present invention.
Since the entire structure of the heat insulating double container 10 is common to that of FIGS. 1 to 3, detailed description thereof will be omitted.

The heat insulating double container 10 includes an outer cylinder 11 and an inner cylinder 12.
And the bottom member 13, and the assembly thereof is almost the same as that of FIGS. 1 and 2, and the difference is the structure of the vibration preventing member.

That is, an inwardly projecting recess 26 is formed at the bottom of the inner cylinder 12, and an inwardly projecting ring-shaped projection 27 is provided at the center of the bottom member 13.
A curved portion 27c protruding outward is formed on the inner bottom surface of the ring-shaped protrusion 27. Further, one or a plurality of vacuum exhaust ports 27b are provided at the top of the tip of the protrusion 27.

Further, the recess 2 provided at the bottom of the inner cylinder 12
6 and the recess side surface 26a and the projecting body side surface 27a, which are the inner peripheral surfaces of the projecting body 27 provided in the center of the bottom member 13, are formed in an arc shape, and after the heat insulating double container 10 is assembled, As shown in FIG. 4, a recess 26 provided in the bottom of the inner cylinder 12 and a protrusion 27 provided in the center of the bottom member 13.
And occupy positions facing each other.

A spherical ball 25 is housed in the internal space 28 of the recess 26 provided at the bottom of the inner cylinder 12 and the protrusion 27 provided at the center of the bottom member 13.
The ball 25 is made of a heat insulating material such as ceramic, and may be made of a hard material or an elastic material. The ball 25, the recess 26 provided in the bottom portion of the inner cylinder 12, and the center of the bottom member 13 may be used. A vibration-preventing member is constituted by the projection 27 provided on the.

That is, the ball 25 and the recess 26 of the inner cylinder 12 are normally not in contact with each other, and the gap d between the recess side surface 26a of the recess 26 and the ball 25 has a predetermined width, for example, about 0. It is formed in a state of 0.5 mm, and this gap d
Is smaller than the gap D between the outer cylinder 11 and the inner cylinder 12. In this embodiment, after the inner cylinder 12 is fitted and fixed in the outer cylinder 11, a vacuum exhaust port 27b is provided in the center of the bottom member 13 in advance at the lower end opening edge 11b of the outer cylinder 11. The hook-shaped end portion 13a of the bottom member 13 having the body 27 and the curved portion 27c is welded. Then, after the space 14 is evacuated from the vacuum exhaust port 27b in the vacuum chamber, the vacuum exhaust port 27b is sealed with a brazing material to form the heat insulating double container 1.
0 will be formed.

When such adiabatic double container 10 vibrates, the inner cylinder 12 tries to vibrate with the upper end opening edge portion 12a as a fulcrum, but the ball 25 tries to move in the opposite direction to the inner cylinder 12, As a result, the ball 25 collides with the recess side surface 26a of the recess 26, the vibration of the inner cylinder 12 is reduced, and the vibration can be effectively prevented. In addition, the ring-shaped protrusion 2
A curved portion 27c protruding outward is formed on the inner bottom surface of 7, and the ball 25 is positioned on the curved portion 27c, so that the ball 25 can be stabilized and the inner cylinder 1
2 vibrates, the ball 25 and the recess side surface 2 of the recess 26
The collision with 6a can be reliably performed, and the vibration preventing effect can be further enhanced.

A description of the present embodiment as an invention is given as follows: "The outer cylinder and the inner cylinder that is housed in the outer cylinder and integrated with the outer cylinder by welding the upper ends of each other. A heat-insulating double container comprising a vibration preventing member for preventing vibration of the inner cylinder, wherein the space formed by the outer cylinder and the inner cylinder is evacuated; And a ball between the outer cylinder bottom and
A heat insulating double container characterized in that the vibration preventing member is formed by the recess and the ball. It will be.

The invention of the present application is not limited to the configuration of the above-described embodiment, and can be modified in design without departing from the scope of the invention. For example, the vibration preventing member may be formed of an elastic body. .

[0050]

According to the first aspect of the present invention, the vibration preventing member is projected on the outer surface of the bottom of the inner cylinder from the hole provided in the bottom of the outer cylinder in a non-contact state with the outer cylinder, and the protruding portion is covered with the bottom cap. By using the hole in the bottom of the outer cylinder as a vacuum exhaust port and sealing the hole in the bottom of the outer cylinder with a bottom cap, the vibration prevention member is placed in a non-contact state with the bottom of the outer cylinder. As with the conventional ones, the thermal insulation function does not deteriorate, so reliability is sufficiently ensured. Further, the vibration of the inner cylinder can be sufficiently suppressed, and the vibration preventing member is not in contact with the bottom of the outer cylinder, so that the assembly can be easily and easily performed. Further, by utilizing the hole at the bottom of the outer cylinder used for projecting the vibration prevention member as a vacuum exhaust port, it is not necessary to use a separate component for vacuum exhaust unlike the conventional one, so that the number of parts can be reduced accordingly. Therefore, the production cost can be reduced.

According to the second aspect of the present invention, by making the inner diameter of the bottom cap smaller than the hole in the bottom of the outer cylinder, even if the vibration prevention member is eccentrically mounted, it can be easily inserted into the hole in the bottom of the outer cylinder. Therefore, it is possible to have a margin in the mounting accuracy, and the production cost can be reduced accordingly. Furthermore, since the gap between the outer diameter of the vibration prevention member and the inner diameter of the bottom cap can be made as small as possible, the vibration prevention function can be enhanced accordingly.

In the invention according to claim 3, after the bottom cap is attached, the end portion of the bottom cap is brought into contact with the outer cylinder, and the bottom cap and the vibration preventing member are brought into non-contact with each other. Similar to the effect of the invention according to 2, the heat retaining function can be maintained as high as the conventional one, and the vibration of the inner cylinder can be more surely reduced, so that the assembly can be easily and easily performed.

According to a fourth aspect of the present invention, a recess is provided at the bottom of the inner cylinder, and a bottom cap having a vibration prevention member and a vacuum exhaust port is attached to the inner surface of the bottom of the outer cylinder, and the vibration prevention member is not in contact with the recess. If desired in a state, by sealing the vacuum exhaust port provided in the bottom cap with a sealing material, the heat retaining function is reduced as in the case of the conventional one in which the vibration prevention member is not provided, like the effect of the invention according to claim 1. There is nothing to do, so the reliability is sufficiently secured. Further, the vibration of the inner cylinder can be sufficiently suppressed, and the vibration preventing member is not in contact with the bottom of the outer cylinder, so that the assembly can be easily and easily performed. Further, by providing a vacuum exhaust port on the vibration prevention member, it is not necessary to use a separate component for vacuum exhaust unlike the conventional one, so that the number of parts can be reduced and the production cost can be reduced.

[Brief description of drawings]

FIG. 1 is a sectional view showing a vibration preventing member of a heat insulating double container of the present invention.

FIG. 2 is a cross-sectional view showing another vibration preventing member of the heat insulating double container of the present invention.

FIG. 3 is a sectional view showing still another vibration prevention member of the heat insulating double container of the present invention.

FIG. 4 is a sectional view showing still another vibration preventing member of the heat insulating double container of the present invention.

FIG. 5 is a sectional view showing a vibration preventing member of a conventional heat insulating double container.

[Explanation of symbols]

10 ... Insulated double container 11 ... Outer cylinder 11a ... Upper end opening edge 11b ... Lower end opening edge 12 ... Inner cylinder 12a ... Upper end opening edge 12b ... rib 12c ... main body 13 ... Bottom member 13a ... Hook-like end 13b ... recess 13c ... recess bottom 13d ... Vacuum exhaust port 14 ... Void 15 ... Vibration prevention member 15a ... Cylindrical body 15b ... Support member 15c ... Upper opening end 15d ... hole 16 ... bottom cap 16a ... Cylindrical part with bottom 16b ... Collar part 17 ... Getter 18 ... Support bracket 20 ... Recess 20a ... Recess side surface 21 ... Bottom cap 21a ... Cylindrical part 21b ... Collar part 21c ... Vibration prevention protrusion 21d ... Side surface of protrusion 21e ... Vacuum exhaust port 22 ... Open hole 25 ... Ball 26 ... Recessed portion 26a ... Recessed portion side surface 27 ... Projection 27a ... Projection side surface 27b ... Vacuum exhaust port 27c ... Curved part 28 ... Internal space

Continued front page    F-term (reference) 3E061 AA16 AB05 AD07 DA03 DA12                       DB04                 3E067 AB26 AB99 BA03B BA05C                       BB11B BB11C BB23C CA18                       ED04 ED20 GA12 GA13 GD10                 4B002 AA01 BA31 BA44 CA32 CA50

Claims (4)

[Claims] 1. An outer cylinder, an inner cylinder housed in the outer cylinder and integrated with the outer cylinder by welding upper ends of the outer cylinder, and a vibration preventing member for preventing vibration of the inner cylinder. In a heat-insulating double container in which a space formed between the outer cylinder and the inner cylinder is evacuated, the vibration preventing member is provided on the outer surface of the inner cylinder bottom portion from the outer cylinder through a hole provided in the outer cylinder bottom portion. A heat insulation device, characterized in that it is projected in a contact state, the projected portion is covered with a bottom cap, the hole in the bottom of the outer cylinder is used as a vacuum exhaust port, and the hole in the bottom of the outer cylinder is sealed by the bottom cap. Heavy container. 2. The heat insulating double container according to claim 1, wherein the inner diameter of the bottom cap is smaller than the hole of the bottom of the outer cylinder. 3. After mounting the bottom cap, an end portion of the bottom cap contacts the outer cylinder, and the bottom cap and the vibration prevention member are not in contact with each other. The heat-insulating double container according to 2. 4. An outer cylinder, an inner cylinder housed in the outer cylinder and integrated with the outer cylinder by welding the upper ends of the outer cylinder, and a vibration preventing member for preventing vibration of the inner cylinder. In a heat insulating double container in which a space formed by the outer cylinder and the inner cylinder is evacuated, a recess is provided in the bottom of the inner cylinder, and the vibration preventing member and the vacuum exhaust port are provided on an inner surface of the bottom of the outer cylinder. A heat insulating double container, wherein a bottom cap is attached, the vibration preventing member is desired in the concave portion in a non-contact state, and a vacuum exhaust port provided in the bottom cap is sealed with a sealing material.