JP3127910B2 - Metal vacuum insulated container - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum insulation container made of metal for use in an electric pot, an insulation water bottle and the like.

[0002]

2. Description of the Related Art The above-mentioned vacuum insulation container made of metal includes:
As shown in FIG. 27, a bottle 9 in which the inner container 91 and the outer container 92 have a double structure with a gap S therebetween and the space between them is evacuated.
There is 0. The outer container 92 of the bottle 90 is
2a and a disc-shaped bottom member 92b are welded. A cylindrical inner container 91 with a bottom is accommodated in the outer container 92, and a gap S is defined therebetween. Bottle 9
In the case of 0, a concave portion 93 is formed in the bottom member 92b of the bottle 90 in order to evacuate the gap, and an exhaust port 94 opened at the time of evacuation is formed in the center of the inner surface of the concave portion 93. The exhaust port 94 is sealed in the recess 93 by a sealing material after evacuation. As the sealing material, a solid brazing material 95 made of glass or the like is used.

For example, the above-described solid brazing material 95 is a solid in a columnar shape until the exhaust port 94 is sealed, and a gap is formed between the solid brazing material 95 and the exhaust port 94 located immediately below in a hemispherical concave portion 93. It is placed in an open state (the solid brazing material 95 in this state is shown in FIG. 27). With the solid brazing material 95 placed on the recess 93 in this manner, the bottle 90 is placed in a vacuum heating furnace. After the evacuation, the solid brazing material 95 is melted to cover the exhaust port 94, and then, when the brazing material 95 is solidified, the exhaust port 94 is sealed (the brazing material 95 in this state is removed as shown in FIG. 27).
Is shown by a two-dot chain line. ).

[0004]

By the way, in the above-mentioned vacuum sealing technology at a low temperature, there is a demand to manufacture a product having a performance as low as possible at a low price in response to recent needs. Here, in order to reduce the price of products, it is necessary to not only reduce the number of parts but also to increase the work efficiency during manufacturing, increase the reliability of individual processes, improve the yield, etc. Various factors will be required.

[0005] However, the conventional structure or manufacturing method cannot simultaneously satisfy various factors required to reduce the cost, and it is difficult to provide a highly reliable product at a low price. Was. For example, while the above-mentioned brazing material is solid, it is important to open the upper part of the exhaust port and increase the exhaust efficiency in order to shorten the processing time and reduce the cost. No technology has been developed to ensure that the exhaust port is sealed when the material is melted, and then to maintain a vacuum state for as long as possible.

Accordingly, an object of the present invention is to provide a metal vacuum heat insulating container which can solve the above-mentioned technical problems, overcome various factors required for vacuum sealing technology, and reduce the cost. It is to be.

[0007]

According to a first aspect of the present invention, there is provided a metal vacuum container having a metal inner container and an outer container having a double structure with a gap therebetween, the main body having a vacuum gap. A brazing material for sealing an exhaust port formed in the main body to make a vacuum, and the brazing material is melted from a solid state, thereby closing the exhaust port and sealing the exhaust port. In the outer container, an accommodation recess for accommodating the brazing material in a solid state and in a loosely fitted state is formed, and an exhaust port is formed in the accommodation recess, and the brazing material in the solid state is located above the exhaust port. Is arranged at a position to open, and when the brazing material arranged here is melted, a flow path is formed to flow from the position to open above the exhaust port to block the exhaust port ,
The exhaust port is the part where the bottom of the solid brazing material is placed.
It is characterized in that it is formed in a portion that is one step higher .

According to the first aspect of the present invention, at the time of evacuation, the solid brazing material is accommodated in the accommodation recess,
During that time, the movement is regulated, so that the upper part of the exhaust port can be reliably opened, so that the exhaust efficiency can be improved. Further, when the brazing material is melted, it flows through the flow path to reach the exhaust port, and the exhaust port can be reliably sealed. Here, “above the exhaust port” may be based on the posture of the main body when the vacuum is applied, or may be defined as the direction in which the exhaust port faces.

In addition, since the brazing material is in the loosely fitted state, the brazing material can be smoothly and easily accommodated in the accommodating recess, and the workability is good.

[0010]

Further , even when the brazing material is loosely fitted and moved in the accommodation concave portion during evacuation, the brazing material does not move right above the exhaust port, and the exhaust port can be reliably opened. The degree of freedom in arranging the brazing material in the accommodation recess increases.

[0012]

[0013]

A metal vacuum container according to a second aspect of the present invention has a metal inner container and an outer container having a double structure with a gap formed between the main body and the main body, the gap being evacuated, and the main body being evacuated. And a brazing material for sealing the exhaust port formed in
The brazing material is melted from a solid state, and in a metal vacuum insulated container that seals the exhaust port by closing the exhaust port, the exhaust port is formed in an outer container, and the brazing material is solid in the exhaust port. It is temporarily fixed in a inserted condition in its case, wax
The material is placed in the gap between the inner container and the outer container.
They were allowed in contact with the inner container, positioning the temporarily fixed is to be characterized Rukoto.

According to the second aspect of the present invention, in order to temporarily hold the brazing material, the exhaust port which is essential for evacuation can also be used, and this exhaust port has a simple structure. Thus, the number of parts can be reduced. Further, the brazing filler metal can be easily inserted into the exhaust port formed in the outer container, and the workability is good. Further, since the brazing material is inserted into the exhaust port and is securely temporarily fixed, displacement of the brazing material with respect to the exhaust port can be prevented. In addition, the brazing material passing through the exhaust port faces both inside and outside of the gap. As a result, after evacuation, the melted brazing material can reliably cover the exhaust port and reliably seal.

Further, by bringing the brazing material into contact with the inner container, it is possible to properly position the inside of the exhaust port, so that the exhaust port can be reliably sealed with the melted brazing material after evacuation.

In addition, by bringing the brazing material into contact with the inner container, the positioning can be easily performed in the exhaust port, so that the workability is good and the temporary fixing can be securely performed. In addition, if the brazing material that comes into contact with the inner container while melting into the gap after the evacuation is melted, the inner container and the outer container can be connected, so that the main body can be reinforced .

[0018]

[0019]

According to a third aspect of the present invention, there is provided a metal vacuum container having a metal inner container and an outer container which are separated by a gap.
The main body has a vacuum in the gap and the vacuum
And a brazing material for sealing an exhaust port formed in the main body,
This brazing material melts from the solid state,
A metal vacuum insulated container that seals and seals the exhaust port
The exhaust port is formed in the outer container, and the brazing material is solid.
It is characterized in that it is temporarily inserted into the exhaust port in the state, is temporarily fixed , and surrounds the exhaust port and the brazing material to form a step higher by one step. According to the invention described in claim 3, after vacuum evacuation, when the brazing material melts, so collecting in a portion surrounded by the stepped, it is possible to reliably seal the exhaust opening.

[0021]

[0022]

[0023]

[0024]

[0025]

[0026]

[0027]

[0028]

According to the first aspect of the present invention, the solid brazing material accommodated in the accommodating recess at the time of evacuation is:
Since the upper portion of the exhaust port can be reliably opened, the exhaust efficiency can be increased, so that the processing time can be shortened and the manufacturing cost can be reduced. In addition, when the brazing material is melted, the exhaust port can be reliably sealed.

Further, if the brazing material is in a loosely fitted state, the workability at the time of accommodation in the accommodation recess is good, so that the operation time can be shortened and the production cost can be further reduced .

Further, if the exhaust port is formed one step higher than the portion where the brazing material is placed in the accommodation recess, the upper portion is reliably opened from the brazing material, so that the brazing material can be freely placed in the accommodation recess. As a result, the workability at the time of arranging the brazing material is good, and the manufacturing cost can be further reduced.

[0031]

[0032]

According to the second aspect of the present invention, the exhaust port can also be used for temporary fixing of the brazing material, and the exhaust port has an essential structure and a simple structure, so that the number of parts can be reduced. If it is an exhaust port formed in the outer container, workability at the time of insertion is good. In addition, since the brazing filler metal can be securely fixed by the exhaust port, the exhaust port can be reliably sealed after evacuation, and the vacuum state can be reliably maintained.

Further, if the brazing material is in contact with the inner container, it can properly position the exhaust mouth, it is possible to reliably seal the exhaust opening. Further, since the brazing material can be easily positioned, the workability is good, the manufacturing cost can be further reduced, and the temporary fixing can be reliably performed, so that the exhaust port can be reliably sealed after evacuation. In addition, the brazing material can be connected to the inner container and the outer container by melting, so that the main body can be reinforced.

[0035]

According to the invention described in claim 3, one step high step is, therefore surrounds the exhaust port and the brazing material, it is possible to braze melted after evacuation to reliably seal the exhaust opening.

[0037]

[0038]

[0039]

[0040]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a front sectional view of a heat retaining water bottle according to an embodiment of the present invention. Insulated water bottle 2
Is a container main body 10 as a metal vacuum insulation container capable of storing a liquid content therein, and a middle plug portion which covers the opening 10a at the upper end of the container main body 10 to open and close the spout while dividing the spout. 15, a lid 16 also serving as a cup that covers the inner plug 15 and the upper part of the container body 10, and a bottom cover 17 that covers the bottom of the container body 10. In this heat retaining water bottle 2, the peripheral surface of the container body 10 also serves as an exterior body.

The container main body 10 has a double-layered structure in which the inner container 11 and the outer container 12 made of stainless steel are separated from each other by a gap S, and the gap S is evacuated, and a portion along the peripheral surface and a portion along the bottom surface. And have a double structure. The outer container 12 of the container body 10 is configured by welding a cylindrical portion 13 and a bottom portion 14. The inner container 11 is formed in a cylindrical shape with a bottom, and has a bottom surface portion 11 a having a concavely curved inner side, and a bottom surface portion 1.
1a, and has a cylindrical side surface portion 11b rising from the outer peripheral edge. The side portion 11b is once thinned in diameter at a neck portion 11c near an upper end thereof, and is formed in a cylindrical shape at an upper end portion. The upper end of the inner container 11 and the upper end of the cylindrical portion 13 of the outer container 12 are welded in an airtight state.

The cylindrical portion 13 of the outer container 12 is formed in a substantially cylindrical shape surrounding the outer peripheral surface of the side portion 11b of the inner container 11. A male screw into which the inner plug 15 and the lid 16 are screwed is formed on the upper part of the cylindrical portion 13. The bottom part 14 of the outer container 12 is formed in a substantially disk shape along the bottom part 11 a of the inner container 11. An annular dent is formed on the outer peripheral edge of the bottom surface portion 14, and the outer side in the radial direction from this dent is
The lower end of the cylindrical portion and the lower end of the cylindrical portion 13 are welded to each other in an airtight state.

Further, the container body 10 is provided with a sealing mechanism 40 at the center of the bottom portion 14 for vacuum-sealing the gap between the above-mentioned double-structured portions. In addition, a getter 50 for increasing the degree of vacuum facing the gap is provided on the bottom surface portion 14. In the present invention, the sealing mechanism 40 is novel. The details will be described below. 2A and 2B are enlarged views of a sealing mechanism of the heat retaining water bottle of FIG. 1, wherein FIG. 2A is a bottom view, and FIG. 2B is a front sectional view in an inverted state. Note that FIG. 2 and each of the drawings described below are illustrated in an inverted state.

As shown in FIG. 2, the sealing mechanism 40 includes a housing recess 45 formed on the bottom portion 14 of the outer container 12 and an exhaust gas formed at the bottom of the housing recess 45 for evacuating the gap. It has a port 41, a brazing material 44 made of glass for closing the exhaust port 41, and a temporary fixing member 46 for temporarily fixing the brazing material 44 in the accommodation recess 45 when making a vacuum. Brazing material 44
Is in a solid state at the time of evacuation, is melted by heating to close the exhaust port 41, and then solidifies to seal the exhaust port 41 (this state is shown by a two-dot chain line in FIG. 2B). .

The accommodation recess 45 is provided in the bottom portion 14 of the outer container 12.
And is recessed toward the gap S side.
The accommodation recess 45 has a substantially T-shaped bottom surface 45a in plan view, and a side surface 45b rising from the periphery of the bottom surface 45a. The accommodation recess 45 has a first portion 45c for accommodating the brazing material 44 in a solid state during evacuation, and a second portion 45d in which the exhaust port 41 is formed.

In the housing recess 45, the bottom surfaces of the first portion 45c and the second portion 45d are both formed at the same depth and communicate with each other through the communication port 45e. The first portion 45c is formed to extend in one direction. The second portion 45d extends from a substantially central portion along the longitudinal direction of the first portion 45c in a direction orthogonal to the direction in which the first portion 45c extends. An exhaust port 41 is formed substantially at the center of the second portion 45d. As described above, in the housing recess 45, the solid brazing material 44 is disposed at the first portion 45c, which is a position that opens above the exhaust port 41, and is in the posture of the container body 10 at the time of sealing after evacuation. When the brazing material 44 accommodated in the first portion 45c is melted, a flow path that flows while being guided to close the exhaust port 41 from a position that opens above the exhaust port 41 flows from the first portion 45c to the communication port 45e.
Through the second portion 45d (arrow F).
reference).

The first portion 45c of the accommodation recess 45 accommodates the solid brazing material 44 in a loosely fitted state. First part 4
5c is a side surface of the entire circumference except for the communication port 45e,
4, the displacement of the brazing material 44 is restricted both in a direction approaching the exhaust port 41 and in a direction away from the exhaust port 41 from a position in a predetermined range. The solid brazing material 44 can be stably placed on the bottom surface 45a of the first portion 45c along the lower surface of the solid brazing material 44. Further, the communication port 45e is formed to be shorter than the length along the length of the brazing material 44, and the brazing material 44 in the first portion 45c is formed.
Is prevented from passing through the communication port 45e, and the second portion 45
d is prevented from entering.

The temporary fixing member 46 is a metal plate-like member, and is disposed so as to straddle the accommodation recess 45. One end 46a of the temporary fixing member 46 is connected to the bottom portion 14 of the outer container 12.
It is fixed by welding. The central portion of the temporary fixing member 46 is disposed above the brazing material 44 housed in the housing recess 45. The temporary fixing member 46 and the housing recess 45 cooperate to suppress the displacement of the brazing material 44 and prevent the brazing material 44 from falling out of the housing recess 45.

The brazing material 44 has a predetermined shape, for example, a columnar solid, and is held in the first portion 45 c of the accommodation recess 45 in a state before melting after evacuation. . In addition, the shape of the brazing material 44 is not particularly limited, such as a disk shape, a spherical shape, a cylindrical shape having a taper, and the like, as described later, in addition to the cylindrical shape. In addition, as the brazing material 44, a glass-based sealing material such as a lead borosilicate glass sealing material, a metal-based brazing material such as an aluminum, tin, or nickel-based brazing material can be used.

The exhaust port 41 is large enough to efficiently exhaust when the upper part is opened in a posture at the time of sealing after the evacuation, and is formed by the surface tension of the melted brazing material 44.
4 is sized to be able to stay in the exhaust port 41. The evacuation is performed as follows. Container body 10
The inner container 11 and the outer container 12 are formed in advance and welded to each other with a gap S opened. In this state, an exhaust port 41 is formed in the bottom portion 14 of the outer container 12.

First, the container body 10 is set in a predetermined posture,
For example, it is in an inverted state with the opening facing downward. In this state, the accommodation recess 45 is open upward.
The brazing material 44 is accommodated in the accommodating recess 45 in a solid state, and is temporarily fixed by a temporary fixing member 46 (this state is shown by a solid line in FIG. 2). The container body 10 is evacuated in the vacuum heating furnace, and the gap S is also evacuated through the exhaust port 41.

After evacuation, the brazing material 44 melted by heating
Flows through the above-described flow path to form the first portion 4 of the accommodation recess 45.
Spread from 5c to the second portion and cover the exhaust port 41. When the temperature decreases, the brazing material 44 solidifies, and as a result, the exhaust port 41 is sealed as shown by a two-dot chain line in FIG.
Hereinafter, another embodiment of the present invention will be described. In the following embodiments, the same portions as those described above are denoted by the same reference numerals, description thereof will be omitted, and a description will be given focusing on portions different from the other embodiments.

The embodiment shown in FIG. 3 differs from the embodiment shown in FIG. 2 in that the housing recess 45 is different from the embodiment shown in FIG. The second portion 45d than the bottom surface of the first portion 45c
Is formed one step lower. Thus, the above-described flow path is formed from the first portion 45c to the second portion 45d through the stepped communication port 45e (see arrow F). When the brazing material 44 melts after evacuation, the brazing material 4
4 flows while being guided along the flow path toward the exhaust port 41 located at a position lower than the bottom surface of the first portion 45c on which the first portion 45 is placed, and reliably covers the exhaust port 41. As a result, the brazing material 44
Thereby, the exhaust port 41 can be more reliably sealed.

In the embodiment shown in FIG.
Is formed in a circular shape in a plan view, and a second portion
A portion 45d is provided, and the remaining portion is a first portion 45c. The first portion 45c accommodates the brazing filler metal 44 in a solid state in a displaceable loosely fitted state. Exhaust port 4
1 is formed on the bottom surface of the second portion 45d,
It is formed one step higher than the bottom surface of the first portion 45c,
Above this, the brazing material 44 is prevented from easily entering from the first portion 45c. Thus, the first portion 45c
The brazing material 44 can be arranged at a position where the upper part of the exhaust port 41 can be opened. Further, when the brazing material 44 is melted, the second portion 45d is formed together with the bottom surface of the first portion 45c.
Has a size that can also cover the bottom surface of the. As described above, the above-described flow path is formed in the accommodation recess 45 extending from the first portion 45c to the second portion 45d, and flows the melted brazing material 44 from the first portion 45c to the second portion 45d. It can ride on the upper surface of the second portion 45d to reach the exhaust port 41.

The receiving recess 45 shown in FIG. 5 is formed in a circular shape in a plan view, and has a solid brazing material 44 in a solid state.
Is placed with its axis parallel to the bottom surface 45a. The exhaust port 41 is formed on a side surface 45b of the housing recess 45. The accommodation recess 45 accommodates the brazing material 44 in a displaceable loosely fitted state in a first portion 45c which is a central region in plan view. The first portion 45c is arranged at a position where the brazing material 44 is opened above the exhaust port 41. When the brazing material 44 is melted, the bottom surface 45a of the first portion 45c is formed.
At the same time, it has a size that can cover up to the height of the side surface 45b above the exhaust port 41. The melted brazing material 44
The gas flows through a flow path formed from the center of the housing recess 45 toward the side surface 45b, and covers the exhaust port 41.

In the embodiment shown in FIG.
Is formed in a circular shape in plan view, and a solid brazing material 44 in a solid state is placed thereon in the same manner as in the embodiment of FIG. The brazing material 44 is formed to be long in the axial direction, and the length in the longitudinal direction is formed to be slightly shorter than the diameter of the accommodation recess 45. In addition, the exhaust port 41 is formed at the center of the bottom surface 45a of the accommodation recess 45. Therefore, the brazing material 44 in the accommodating recess 45 is located directly above the exhaust port 41 in the solid state during evacuation, and can be arranged in a different posture while contacting the peripheral edge of the exhaust port 41. I have. For example, as shown by a two-dot chain line in FIG. 6A, the brazing material 44 is arranged right above the exhaust port 41, and the longitudinal direction of the brazing material 44 is changed in various directions, for example. Can be accommodated.

Further, regardless of the posture of the brazing material 44, the brazing material 44 and the exhaust port 41 are relatively deformed so that the solid brazing material 44 opens at least a part of the exhaust port 41. It is formed (see FIG. 6A). That is, the exhaust port 41 is circular, and the diameter thereof is
4 is formed larger than the diameter of the section. Exhaust port 4
When the brazing material 44 is disposed directly above the brazing material 44, a flow path is formed below the brazing material 44 for exhausting through an opening defined by the peripheral portion of the exhaust port 41 and the surface of the brazing material 44. Air is exhausted through this flow path and the portion opened above the exhaust port 41.

In the embodiment shown in FIG.
Is formed in a circular shape in plan view, and a spherical brazing material 44 in a solid state is placed thereon. The bottom surface 45a of the accommodation recess 45 is inclined so as to be lowest at the center, and the exhaust port 41 is formed at the center. The brazing material 44 is accommodated in the accommodating concave portion 45 in a displaceable loosely fitted state, and is in a solid state immediately above the exhaust port 41 during vacuum evacuation, and is in contact with the peripheral edge of the exhaust port 41.

Further, the brazing material 44 and the exhaust port 41 are formed in a relatively different shape. That is, the exhaust port 41 is formed in a square, and the length of one side of the square of the exhaust port 41 is
The diameter of the brazing material 44 is slightly shorter than the diameter of the sphere. Therefore, the brazing material 44 does not pass through the exhaust port 41, and the solid brazing material 44 opens at least a part of the exhaust port 41, for example, above a corner of the exhaust port 41. Further, since the bottom surface 45 a is inclined downward toward the exhaust port 41, the spherical brazing material 44 is autonomously disposed directly above the exhaust port 41.

In the embodiment shown in FIG.
Is formed in a substantially rectangular shape in a plan view, and accommodates a solid-state cylindrical brazing material 44 in a predetermined posture therein. As the predetermined posture, the cylindrical axis of the brazing material 44 and the longitudinal direction of the housing recess 45 are parallel. The bottom surface 45a of the accommodation recess 45 is formed of a pair of inclined surfaces 45f that are inclined in a direction orthogonal to the longitudinal direction of the accommodation recess 45. The pair of inclined surfaces 45f are opposite to each other, and are connected to each other at the lowest part. The lowest portion extends in parallel with the longitudinal direction of the housing recess 45 and passes through the center of the bottom surface 45a. As described above, since the bottom surface 45a is inclined, the brazing material 44 is removed from the bottom surface 45a.
Can be arranged along the lowest part, and can be easily maintained at a predetermined position and posture with respect to the exhaust port 41. For example, the brazing material 44 is located right above the exhaust port 41 and is arranged so that its longitudinal directions are orthogonal to each other.

The brazing material 44 and the exhaust port 41 are formed in a relatively different shape. That is, the exhaust port 41 is located on the bottom surface 45a of the accommodation recess 45 and extends long in parallel with the short side surface of the bottom surface 45a. The longitudinal direction of the exhaust port 41 is orthogonal to the central axis of the columnar brazing material 44 placed on the bottom surface 45a. The size of the exhaust port 41 along the longitudinal direction is longer than the diameter of the brazing material 44. Therefore, the brazing material 44 housed in the housing recess 45 in a predetermined posture can open the upper portions of both ends of the exhaust port 41 in the longitudinal direction.

In the embodiment shown in FIG.
Is formed in a substantially rectangular shape in a plan view, and accommodates a cylindrical brazing material 44 therein. Housing recess 4
The bottom surface 45a of 5 is formed as a circumferential surface along the outer peripheral surface of the brazing material 44, and is, for example, a circumferential surface that is fitted in the brazing material 44 with a gap. The exhaust port 41 is formed, for example, in a rectangular shape in parallel with the longitudinal direction of the housing recess 45 in plan view along the lowest portion of the bottom surface 45a. The brazing material 44 is disposed immediately above the exhaust port 41 without leaving a gap so that the peripheral portion of the exhaust port 41 and the lower surface of the brazing material 44 are in contact with each other. A space that can be exhausted through the exhaust port 41 is formed between the inner peripheral surface of the housing recess 45 and the outer peripheral surface of the brazing material 44.

In the embodiment shown in FIG.
Reference numeral 5 is formed in a cylindrical shape having a circular shape in plan view, and accommodates therein a cylindrical brazing material 44 in a posture in which the planar shape is circular. The brazing material 44 is accommodated in the accommodation recess 45.
It is formed with a slightly smaller diameter, and can be exhausted from the exhaust port 41 through a space defined between the periphery of the brazing material 44 and the accommodation recess 45. The exhaust port 41 is formed at the center of the circular bottom surface 45a of the housing recess 45. The brazing material 44 is disposed immediately above the exhaust port 41 without leaving a gap so that the peripheral portion of the exhaust port 41 and the lower surface of the brazing material 44 are in contact with each other.

In the embodiment shown in FIG.
5 is a first portion 45c on which a cylindrical brazing material 44 is placed.
And a second portion 45d on the side of the first portion 45c where the exhaust port 41 is formed. First part 45c
Is formed in substantially the same shape as the accommodation recess 45 shown in FIG.
It has a bottom surface 45 a shaped along the brazing material 44 and holds the brazing material 44 reliably. The second portion 45d is the first portion 4
5c communicates with the central portion in the longitudinal direction via a passage 45g. The passage 45g is connected to the communication port 4 of the embodiment shown in FIG.
Similarly to 5e, the brazing material 44 is set so as not to enter. The passage 45g is formed so as to be inclined downward from the first portion 45c, and is disposed at the bottom end thereof such that the second portion 45d is lower than the first portion 45c. As described above, the first portion 45c of the accommodation recess 45 accommodates the solid brazing material 44 with the upper part of the exhaust port 41 opened, and is formed by the passage 45g when the brazing material 44 is melted after evacuation. The gas flows while being guided along the flow path, and the exhaust port 41 can be reliably closed and sealed.

In the embodiment shown in FIG.
Reference numeral 5 denotes a housing recess 45 shown in FIG. 9 formed longer in the axial direction. In the accommodation recess 45, the brazing material 44
Is set (upper part in FIG. 12A), and a circular exhaust port 41 is formed avoiding this area. As described above, the accommodation recess 45 accommodates the solid-state brazing material 44 in the above-described region by opening the upper portion of the exhaust port 41 and guides the flow path formed in the accommodation recess 45 when the brazing material 44 is melted. The exhaust gas flows while being blocked. In addition, since the housing recess 45 fits and stores the brazing material 44 in a pushed state, the brazing material 44 can be temporarily fixed without displacement, so that the brazing material 44 does not move carelessly.
The upper part of the exhaust port 41 can be reliably opened.

In the embodiment shown in FIG.
Numeral 0 denotes an exhaust port 41 formed on the bottom surface portion 14 of the outer container 12 for evacuating the gap S, a glass brazing material 44 closing the exhaust port 41, and holding the brazing material 44 during evacuation. And a holding hole 47. The holding hole 47 is
It is not provided in the recess as in the above embodiment.
The brazing material 44 is formed in a solid state into a cylindrical shape.

The holding hole 47 is provided in the bottom portion 14 of the outer container 12.
Is formed separately from the exhaust port 41 on the side approaching the exhaust port 41. The holding hole 47 is formed in a shape and size capable of inserting the brazing material 44 and fixing an intermediate portion of the brazing material 44, for example, a circular shape having an inner diameter that fits in a press-contact state with the outer peripheral surface of the brazing material 44. . The holding hole 47 is disposed above the inner container 11 at the time of evacuation, and is temporarily fixed by, for example, inserting a solid brazing material 44 therein by press-fitting. 1
3 is shown by a solid line. ). In the temporarily fixed state, one end 44a of the brazing material 44 is arranged in the gap, and the other end 44b of the brazing material 44 is arranged outside the gap. After evacuation,
When the brazing material 44 is melted by heating, it spreads around the holding hole 47 and can cover the exhaust port 41 in addition to the holding hole 47. Thereafter, when the brazing material 44 solidifies, the exhaust port 4
1 and the holding hole 47 are sealed (this state is shown by a two-dot chain line in FIG. 13).

The exhaust port 41 is formed in a circular shape having a smaller diameter than the holding hole 47 so that the brazing material 44 cannot be inserted. In the embodiment shown in FIG. 14, the periphery of the exhaust port 41 and the holding hole 47 of the embodiment of FIG.
A step 48 is formed on the bottom portion 14 of the outer container 12, and the exhaust port 41 is formed in a recess defined by the step 48.
And a holding hole 47 are arranged, and the brazing material 44 is also arranged in the recess.

In the embodiment shown in FIG.
0 is the exhaust port 41 and the holding hole 4 shown in FIG.
7 is also used. That is, the sealing mechanism 40 has an exhaust port 41 formed on the bottom surface portion 14 of the outer container 12 to evacuate the gap S, and a glass brazing material 44 closing the exhaust port 41. . The brazing material 44
It is temporarily fixed in the exhaust port 41 while being inserted into the exhaust port 41. In addition, a concave portion 11 f facing the exhaust port 41 is formed on the gap side of the bottom portion 11 a of the inner container 11, but the accommodation recess 45 described above is not formed around the exhaust port 41.

The brazing material 44 is in a solid state and has a columnar shape. When a vacuum is applied, the brazing material 44 is inserted through the exhaust port 41 so as to face the gap S, and comes into contact with the concave portion 11f of the inner container 11 from the gap side. The temporary fixing is determined by making contact. At this time, one end 44a of the brazing material 44 is in the gap and is held in contact with the concave portion 11f of the inner container 11. In the held state, the other end 44b of the brazing material 44 is disposed outside the gap. After evacuation, when the brazing material 44 is melted by heating, it spreads around the exhaust port 41 and covers the exhaust port 41. In addition, the brazing material 44 in the gap melts and accumulates in the concave portion 11 f of the inner container 11, and also spreads to the peripheral edge of the exhaust port 41. Thereafter, when the brazing material 44 is solidified, the exhaust port 41 is sealed (this state is shown by a two-dot chain line in FIG. 15). Further, the solidified brazing material 44 is provided in the recess 11 f of the inner container 11.
And the peripheral portion of the exhaust port 41 of the bottom portion 14 of the outer container 12.

The exhaust port 41 is formed on the bottom 14 of the outer container 12. The exhaust port 41 is formed into a shape and size that can be inserted and held by the brazing material 44 so as to also serve as the above-described holding hole, and can be exhausted between the inserted brazing material 44 and the peripheral edge of the exhaust port 41. It is formed in a shape and a size that can form a suitable ventilation gap. For example, exhaust port 4
Reference numeral 1 denotes a circular shape which is fitted into the outer peripheral surface of the cylindrical brazing material 44 with a gap.

In the embodiment shown in FIG. 16, the outer container 12 surrounds the periphery of the exhaust port 41 of the embodiment shown in FIG.
A step 48 which is one step higher is formed on the bottom surface portion 14 of FIG. The exhaust port 41 and the brazing material 44 are arranged in a concave section defined by the step 48. The step 48 is formed in two steps, and the exhaust port 41 is formed at the lowest part. FIG.
In the embodiment shown in FIG. 7, the embodiment shown in FIG.
The shape of the brazing material 44 and the state in which the brazing material 44 is temporarily fixed in the exhaust port 41 are different. That is, one end 44a of the brazing material 44 is formed in a cylindrical shape, and the other end 44b is formed.
Has a substantially spherical bulge having a diameter larger than that of a cylinder. This bulge can be easily formed, for example, by heating the glass. The brazing material 44 is provided at the exhaust port 41.
In the state where the bulge is inserted into the inner container 11, the boundary between the bulge and the columnar portion is brought into contact with the peripheral edge of the exhaust port 41, the bulge is arranged outside the gap, and one end 44 a of the brazing material 44 is It is not in contact with the recess 11f.

In the embodiment shown in FIG. 18, the periphery of the exhaust port 41 and the brazing material 44 shown in FIG.
In the same manner as described above, a step 48 which is one step higher is provided on the bottom portion 14 of the outer container 12.
Are formed. The exhaust port 41 and the brazing material 44 are arranged in a concave section defined by the step 48. The concave portion is formed in one step, and an exhaust port 41 is formed at the lowest portion.

The embodiment shown in FIG. 19 differs from the embodiment shown in FIG. 17 in the shape of the brazing material 44. That is, the brazing material 44 is formed in a truncated conical shape having a tapered peripheral surface. An intermediate portion of the taper of the brazing material 44 is held in contact with the peripheral edge of the exhaust port 41. In this state, the one end 44a, which is the small diameter side portion of the brazing material 44, is located in the gap and is not in contact with the concave portion 11f of the inner container 11. Further, the other end 44b which is a large diameter side portion of the brazing material 44 is disposed outside the gap S.

The embodiment shown in FIG. 20 differs from the embodiment shown in FIG. 15 in the shape of the peripheral portion of the exhaust port 41 and the state in which the brazing material 44 is temporarily fixed in the exhaust port 41. I have. That is, the brazing material 44 is formed in a solid state into a cylindrical shape. The bottom portion 14 of the outer container 12 is
It has a cylindrical portion 14a extending from the surface to the inside of the gap in a tapered shape with a small diameter. The inner surface of the cylindrical portion 14a has a conical surface and forms a peripheral portion of the exhaust port 41. The inlet 14b of the cylindrical portion 14a is located on the surface of the bottom portion 14 and faces outside the gap, and is formed to have a diameter larger than the outer diameter of the brazing material 44 so that the brazing material 44 can be easily inserted. The tip 14c of the cylindrical portion 14a is disposed in the gap, and the tip 14c
Is formed smaller than the outer diameter of the brazing material 44 so as to be able to press-fit. The tip 14c of the cylindrical portion 14a is
The intermediate portion of the brazing material 44 in the axial direction is tightly adhered to the brazing material 44, so that the brazing material 44 can be temporarily fixed securely. In this state, the brazing material 44 temporarily fixed to the exhaust port 41 is
It faces the inside and outside of the gap without contacting the first recess 11f. In this way, the tapered cylindrical portion 14a can be temporarily fixed securely without rattling while using the cylindrical brazing material 44. Further, the brazing material 44 can be formed in a cylindrical shape, and can be manufactured at low cost. Because usually,
Since the brazing material 44 is manufactured by cutting out a long rod-shaped material, if it has a cylindrical shape, it is unnecessary to perform secondary processing as compared with a material having a bulge at an end or a tapered shape. The manufacturing cost of the brazing material 44 can be reduced.

In the embodiment shown in FIGS. 17 to 20, the solid brazing material 44 is fitted and held in the exhaust port 41. In such a case, as shown below, By making the shape of the exhaust port 41 irregular, an air escape 41 for exhausting between the exhaust port 41 and the brazing material 44 is provided.
d (see FIGS. 21 and 22) may be formed. Also, in the embodiment shown in FIGS. 15 and 16, the air escape 41d may be formed.

That is, as shown in FIGS. 21 (a) and (b), a plurality of corners 41k, as shown in FIGS.
The shape in which 41m protrudes toward the center side, and FIG.
As shown in FIG. 21C, one projection 41n is protruded so that the brazing material 44 is sandwiched between opposing surfaces of the brazing material 44, or as shown in FIG. The air escape 41d can be formed by the shape formed.

In addition, the above-described air escape is achieved by using a perfectly circular exhaust port 4.
1 can also be formed by press-fitting a brazing material 44 having an irregular cross section. As the irregular shape of the brazing material 44,
As shown in FIGS. 22 (a) to 22 (c), acute or curved grooves 44k, 44m, 44n are formed on the peripheral surface along the direction in which the axis of the brazing material 44 extends, or FIG.
As shown in FIG. 2 (d), an elliptical cross-sectional shape that can be pressed into the exhaust port 41 can be exemplified.

In the sealing mechanism 40 shown in FIG.
The convex portion 49 is formed without forming a concave portion on the bottom surface portion 14 of the second. The ridge 49 is formed integrally with the bottom portion 14 of the outer container 12, protrudes one step higher toward the outside of the gap, and is continuously formed in a bank shape surrounding the exhaust port 41 and the brazing material 44. The outside of the ridge 49 is substantially the same height as the inside of the ridge 49. An exhaust mechanism 40 similar to the embodiment shown in FIG. 6, for example, is provided inside the ridge. The shape of the ridge 49 in plan view is not particularly limited, such as a rectangle, a circle, and an ellipse.

As described above, the bottom portion 14 can be reinforced by the ridges 49 formed on the bottom portion 14 of the outer container 12. The projection 49 can reinforce the bottom cover 17 when it comes into contact with the upper surface of the bottom cover 17. In addition, the brazing material 44
In this case, the ridges 49 need not be formed continuously. When the ridge 49 is formed continuously surrounding the brazing material 44 and the exhaust port 41, when the brazing material 44 is melted, it is prevented from flowing out and the exhaust port 41 is securely sealed. be able to. Therefore, the same effects as those of the above-described housing recess 45 can be obtained by the convex ridges 49, and the inner portion of the convex ridge 49 functions in the same manner as the above-described housing recess 45.

Here, the ridges 49 are provided in addition to the accommodation recesses 45,
The step 48 shown in FIGS. 16 and 18 may be partitioned, and the same operation and effect can be obtained. Also,
When the projections 49 are provided on the bottom surface portion 14 to hold the brazing material 44, the bottom cover 17 can be attached closer to the bottom surface portion 14, compared with the case where the accommodation recesses 45 are provided,
The size can be reduced.

In the embodiment shown in FIG.
Has a sloped surface 14d. The inclined surface 14d is formed on substantially the entire bottom surface portion 14. The inclined surface 14d is formed of a conical surface whose center is the lowest, and is linearly inclined from the outer peripheral edge toward the center and becomes lower. A sealing mechanism 40 is provided at the center of the bottom of the inclined surface 14d.

The sealing mechanism 40 has, for example, an exhaust port 41 and a brazing material 44 similar to those in the embodiment shown in FIG. The exhaust port 41 is formed at the center of the bottom of the bottom portion 14 of the outer container 12. The brazing material 44 is formed in a solid state into a cylindrical shape. The brazing material 44 is placed in the solid state in the vicinity of the center of the bottom portion 14 of the outer container 12 when vacuuming. When the brazing material 44 is melted after the evacuation, it flows along the inclined surface 14d, reliably covers the exhaust port 41 at the bottom, and can be reliably sealed. Further, when the brazing material 44 is formed in a columnar shape or a spherical shape, it is assumed that the brazing material 44 rolls on the inclined surface 14d. You can go back. In addition, since the brazing material 44 melts and flows down the inclined surface 14 d to reliably block the exhaust port 41, the brazing material 44 does not need to be accurately positioned with respect to the exhaust port 41. Therefore, the above-mentioned temporary fixing member 46 is omitted.

Further, since substantially the entire bottom surface portion 14 is formed as an inclined surface, it is not necessary to separately provide a recess such as the above-described housing recess, and the size of the container body 10 can be reduced in the vertical direction. Here, as the inclined surface 14d, in addition to the conical surface,
Examples include a spherical surface and a flat inclined surface. The exhaust port 41 may be formed at the bottom of the inclined surface 14d and in the vicinity thereof, and when formed in the vicinity, the exhaust port 4 is formed in a region covered by the brazing material 44 melted after evacuation.
1 is preferably formed. In addition, when the exhaust port 41 is disposed at a position avoiding the bottom of the bottom portion 14, the brazing material 44 is difficult to be disposed immediately above the exhaust port 41, so that the upper portion of the exhaust port 41 can be opened. , Can be exhausted efficiently.

In the embodiment shown in FIG. 25, the sealing mechanism 4
2 is a plan view of the bottom surface 14 of the outer container 12, a circular accommodation recess 45, an exhaust port 41 at the center of the bottom surface 45 a of the accommodation recess 45, the cylindrical brazing material 44 described above, and FIG.
6 and a temporary fixing member 46 shown in the perspective view of FIG. The temporary fixing member 46 includes a main body 46b disposed above the accommodation recess 45, and a pair of arms 46c that are erected on the main body 46b and face each other in a pair, and these are formed integrally. The pair of arms 46c extend in a bent manner from the both ends of the central portion in the longitudinal direction of the main body 46b into the accommodation recess 45, and embrace the brazing material 44 so as to sandwich the brazing material 44 between the pair of arms 46c. It functions as a member for preventing the material 44 from falling off. The arm 46c is capable of moving the brazing material 44 in the vertical direction and restricting the position in a direction intersecting the vertical direction. In this manner, by allowing the brazing material 44 to move in the up-down direction, the brazing material 44 can be reliably aligned with the bottom surface 45a of the housing recess 45 in which the exhaust port 41 is formed. The brazing material 44 can be accommodated in the interior defined by the main body portion 46b, the pair of arms 46c, and the bottom surface 45a of the accommodation concave portion 45, and can be securely temporarily held. Also, the exhaust port 41
May be disposed so as not to be directly below the brazing material 44 as shown by a two-dot chain line in FIG.

As described above, according to each embodiment of the present invention, as shown in FIGS. 2 to 5 and FIGS.
Is housed so as to open the upper part. This allows
At the time of evacuation, the brazing material 44 in a solid state is housed in the recess 45.
The upper portion of the exhaust port 41 can be reliably opened because the upper portion of the exhaust port 41 can be reliably opened, and the exhaust efficiency can be improved. As a result, the processing time can be reduced, and the manufacturing cost can be reduced. In addition, since the flow path that flows so as to close the exhaust port 41 when the brazing material 44 is melted is formed in the accommodation recess 45, the molten brazing material 44 is formed.
Can flow through the flow path while spreading in the accommodation recess 45, and can reliably seal the exhaust port 41. Here, the expression “above the exhaust port 41” may be based on the attitude of the container body 10 when vacuum is applied, or may be defined as the direction in which the exhaust port 41 faces.

In particular, as in the embodiment shown in FIGS. 2 to 5, the solid brazing material 44 is loosely fitted in the accommodation recess 45, so that the brazing material 44 is smoothly and As a result, the workability is good. Therefore,
As a result of shortening the work time when setting the brazing material 44, the manufacturing cost can be further reduced. Further, in the embodiment shown in FIG. 4, the exhaust port 41 is formed at a position one step higher than the first portion 45 c on which the bottom surface of the solid brazing material 44 is placed in the accommodation recess 45. Accordingly, even when the brazing material 44 is loosely fitted and moves in the accommodation recess 45 during evacuation, the brazing material 44 does not move right above the exhaust port 41 and the exhaust port 41 is reliably opened. As a result, the degree of freedom in arranging the brazing material 44 in the accommodation recess 45 is increased, so that the workability at the time of arranging the brazing material 44 is good,
The manufacturing cost can be further reduced.

In the embodiment shown in FIG. 5, the exhaust port 41 is formed on the side surface 45 b of the recess 45.
Thereby, at the time of evacuation, the brazing material 44 is
The exhaust port 41 can be reliably opened even when it is loosely fitted inside and moves, so that the degree of freedom in arranging the brazing material 44 can be increased. As a result, the workability is good, and the manufacturing cost can be further reduced.

In the embodiments shown in FIGS. 3 and 11, the exhaust port 41 is located at a position lower than the first portion 45c on which the solid brazing material 44 is placed in the accommodation recess 45. Accordingly, when the brazing material 44 is melted after the evacuation, the brazing material 44 flows through the flow path toward the lower exhaust port 41 and covers the exhaust port 41. As a result, brazing material 4
4, the exhaust port 41 can be more reliably sealed.

Also, as in the embodiment shown in FIG.
When the temporary fixing member 46 includes the arm 46c that embraces the solid brazing material 44, the brazing material 44 can be embraced and securely temporarily fixed, so that the brazing material 44 can be prevented from dropping out of the housing recess 45. Moreover, the brazing material 4 for the exhaust port 41
4 can also be prevented. As a result, when the brazing material 44 in the solid state is disposed with the upper side of the exhaust port 41 opened, the exhaust port 41 is reliably opened at the time of evacuation to increase the evacuation efficiency, and melted after evacuation to evacuation The opening 41 can be reliably sealed. Further, since the exhaust efficiency is increased, the manufacturing cost can be further reduced.

The side surface 45b of the housing recess 45 shown in FIGS. 1, 2, 11 and 12 and the step 4 shown in FIG.
8 means that the molten brazing material 44 can be guided to the exhaust port 41, so that the exhaust port 41 can be reliably covered with the brazing material 44, and as a result, the exhaust port 41 can be more securely sealed. In addition, since the brazing material 44 is prevented from moving away from the exhaust port 41, the required amount for sealing can be reduced.

Further, in the embodiment shown in FIGS. 13 and 14, a holding hole 47 for temporarily fixing the brazing material 44 in a solid state is provided, and in the embodiment shown in FIGS. The brazing material 44 in a solid state is inserted into the exhaust port 41 and temporarily fixed, and the exhaust port 41 also serves as a holding hole. As a result, the brazing material 44 is inserted into the holding hole and is securely temporarily fixed, so that not only when the exhaust port 41 functions as a holding hole, but also when the exhaust port 41 and the holding hole 47 are separately provided. As a result, since the brazing material 44 is prevented from being displaced with respect to the exhaust port 41, it can be melted after the evacuation to cover the exhaust port 41 securely and be sealed securely.
13 and 14, the solid brazing material 44 is
Since the holding hole 47 is inserted while facing the inner and outer sides of the gap S, both sides of the holding hole 47 can be securely sealed.
A vacuum state can be reliably maintained. FIG.
20, since the brazing material 44 in the solid state passes through the exhaust port 41 while facing the inner and outer sides of the gap S, both sides of the exhaust port 41 can be reliably sealed. Can be maintained. Here, the holes for temporarily fixing the brazing material 44 include the exhaust port 4 shown in FIGS.
1 or a dedicated holding hole 47 shown in FIGS. 13 and 14.

The holding holes 47 shown in FIGS.
In addition, since the exhaust port 41 shown in FIGS. 15 to 20 is formed in the outer container 12, it is easy to insert the brazing material 44 and the workability is good. Further, since the holding hole 47 and the exhaust port 41 have a simple structure, the number of parts can be reduced. In particular,
In the embodiment shown in FIGS. 15 to 20, in order to temporarily fix the brazing material 44, the exhaust port 4 which is an essential component for evacuation is used.
Since 1 can also be used, the structure can be further simplified.

In particular, as shown in FIGS. 15 and 16, the brazing material 44 is in contact with the inner container 11 in the gap while passing through the exhaust port 41 as a holding hole.
Is properly positioned in the height direction in the exhaust port 41, so that the molten brazing material 44 can reliably seal the exhaust port 41 after evacuation. In addition, in the case of FIGS. 15 and 16, the brazing material 44 abuts on the inner container 11, so that the positioning in the exhaust port 41 can be easily performed without performing the positioning operation. Since the manufacturing cost can be further reduced and the temporary fixing can be reliably performed, the exhaust port 41 can be reliably sealed after the evacuation.

In the case of FIGS. 15 and 16, when the brazing material 44 facing the inside of the gap S and abutting on the bottom portion 11a is melted after the evacuation, the bottom portion 11a of the inner container 11 and the bottom portion 11a are removed. Since the bottom portion 14 of the container 12 can be connected, the container body 10 can be reinforced. For example, the vibration resistance and shock resistance of the container body 10 can be improved. That is, in the case of a metal vacuum insulated container, the inner container 11 and the outer container 12 are used.
Is as small as about 1 mm, for example, when the container is filled with a liquid content and receives vibration or impact,
This is because it is assumed that the outer container 12 will collide with the outer container 12.

In addition, the operation of sealing the exhaust port 41 and the operation of reinforcing the container body 10 can be performed simultaneously. Further, in the embodiment shown in FIGS. 13 and 14, the brazing material 44 in the solid state is fitted into the holding hole 47 to determine the position of the temporary fixing. Further, in the embodiment shown in FIGS. 17 to 20, the brazing material 44 in the solid state is fitted to the exhaust port 41 and is positioned for temporary fixing. As a result, the brazing material 44 is temporarily fixed and positioned more securely without rattling without contacting the inner container 11. As a result, after the evacuation, the brazing material 44
1 can be reliably sealed. Further, the fitted brazing material 44 can be temporarily fixed without being in contact with the inner container 11, so that the required amount of the brazing material 44 can be reduced.

The brazing material 44 has a thin end 44a inserted into the gap, such as a shape having a bulge at the other end 44b shown in FIGS. 17 and 18, and a shape having a taper as shown in FIG. If the shape has a portion that comes into contact with the peripheral edge of the exhaust port, it is easy to insert, easily position in the holding hole and the exhaust port, and set easily. In the embodiment shown in FIGS. 15 to 20, a concave portion 11 f facing the exhaust port 41 is formed in the gap side portion of the inner container 11. As a result, when the brazing material 44 is melted after evacuation, the brazing material 44 is stored in the recess 11f of the inner container 11 below, so that the brazing material 44 can be reliably held even in the molten state. Further, since the concave portion 11f has a concave curved surface shape, when the one end 44a of the brazing material 44 abuts here as shown in FIG. 15 and FIG. The holding hole 47 and the exhaust port 41 functioning as a holding hole can be reliably sealed.

In the embodiment shown in FIGS. 14, 16 and 18, a step 48 which is higher by one step is formed surrounding the exhaust port 41 and the brazing material 44. This allows
When the brazing material 44 is melted after evacuation, the brazing material 44 stays without flowing out from the inside surrounded by the step 48, so that the exhaust port 41 can be reliably sealed. Here, the brazing material 44 corresponds to FIG.
4 and may be temporarily fixed to the holding hole 47, or may be temporarily fixed to the exhaust port 41 as shown in FIGS.

Also, as shown in FIGS. 21 and 22,
When the solid state brazing material 44 and the rim shape of the exhaust port 41 are different from each other, even when the brazing material 44 is inserted, a part of the exhaust port 41 can be reliably opened. In addition, a decrease in exhaust efficiency can be prevented. In the embodiment shown in FIGS. 15 to 20, the exhaust port 41 also serves as a holding hole. Thereby, only a single exhaust port 41 is formed in the bottom portion 14 of the outer container 12, and the structure is simplified.

In the embodiment shown in FIGS. 6 and 7, the brazing material 44 is in a solid state when the exhaust port 4
1 and can be arranged in different postures while contacting the peripheral portion of the exhaust port 41, and regardless of the posture of the brazing material 44, the solid brazing material 44 The brazing material 44 and the exhaust port 41 are formed in a relatively different shape so as to open the upper part. Thereby, the brazing material 44 can be arranged in the exhaust port 41 in different postures, so that the brazing material can be handled in a posture suitable for the work, and the workability is good.
As a result, manufacturing costs can be reduced. Further, since the solid brazing material 44 is brought into contact with the periphery of the exhaust port 41, the exhaust port 41 can be closed as soon as the brazing material 44 is melted.
Can be reduced. Therefore, parts costs can be reduced, and manufacturing costs can be further reduced. In addition, since the solid brazing material 44 can open at least a part of the exhaust port 41 even immediately above the exhaust port 41, it is possible to prevent a decrease in exhaust efficiency.

In particular, as in the embodiment shown in FIG. 9 and FIG.
4, for example, in a cross-sectional shape, the brazing material 44 can be accommodated in the accommodating recess 45 without rattling and can be temporarily fixed securely, so that the brazing material 44 can be misaligned with respect to the exhaust port 41. As a result, after the evacuation, it can be melted and reliably cover the exhaust port 41 to securely seal. In addition, since the accommodation recess 45 has a shape along the brazing material 44, the required amount of the brazing material 44 for reliably closing the exhaust port 41 after evacuation can be further reduced. The cost can be further reduced.

Also, as in the embodiment shown in FIG.
When the ridge 49 is formed on the bottom surface portion 14, the ridge 49 is formed.
With such a simple structure, the bottom portion 14 can be reinforced. Also, as in the embodiment shown in FIG.
2 is formed on the inclined surface 14 d having the exhaust port 41 formed in the vicinity of the deepest portion, the solid brazing material 44 is placed near the deepest portion of the inclined surface 14 d of the bottom portion 14. Since it suffices to mount the device, it is not necessary to perform positioning with high accuracy, and the workability is good. As a result, the manufacturing cost can be further reduced. Here, examples of the inclined surface include a conical surface and a spherical surface.

Since the housing recess 45 shown in FIGS. 9 to 12 has a cross-sectional shape along the outer shape of the brazing material 44, the brazing material 44 can be securely housed without rattling. In particular, since the accommodation recess 45 and the brazing material 44 are in surface contact, the stability can be further improved. As a result, FIG.
12 to FIG. 12, the temporary fixing member 46 is omitted.

In the embodiments shown in FIGS. 6, 7 and 8, the exhaust port 41 and the brazing material 44 are formed in different shapes, so that the brazing material 44 is in contact with the peripheral edge of the exhaust port 41. When arranged just above the exhaust port 41, a flow path for exhausting through an opening defined by the peripheral portion of the exhaust port 41 and the surface of the brazing material 44 is formed below the brazing material 44. As a result of ensuring the evacuation at the time of evacuation through the flow path and the portion opened above the evacuation port 41, a decrease in the evacuation efficiency can be prevented.

Further, in each of the embodiments shown in FIGS.
Since the brazing material 44 is surely arranged directly above the exhaust port 41 without leaving any gap, the brazing material 44 is evacuated after evacuation.
When is melted, the exhaust port 41 immediately below can be reliably and immediately covered and sealed, and the amount of the brazing material 44 required for sealing can be reduced. In each of the embodiments of FIGS. 6 to 8, the brazing material 44 is located directly above the exhaust port 41,
Since the upper part of at least a part of the exhaust port 41 can be reliably opened, a decrease in the exhaust efficiency can be prevented at the time of evacuation, and the exhaust port 41 immediately below can be reliably sealed when melted.

In the housing recess 45 shown in FIGS. 5 and 6, the brazing material 44 can be housed not only in a predetermined posture but also in different postures. In addition, a relatively small-diameter spherical brazing material 44 is accommodated in the accommodating recess 45 of FIGS. 4 and 7. Therefore, at the time of storage, the brazing material 44
The workability when accommodating the brazing material 44 is good, without limiting the posture and position of the brazing material 44.

In each of the embodiments except for the cases shown in FIGS. 3 and 11 described above, the brazing material 44 is held on the side of the exhaust port 41 without leaving an interval in the vertical direction. Even if it is right above, the space is held without any space in the vertical direction, so that the space between the brazing material 44 and the exhaust port 41, particularly the vertical space, can be reduced. As a result, the outer shape of the container body 10 can be reduced in size.
Accordingly, the outer shape can be reduced in size and weight, which is preferable for the heat retaining water bottle 2. Further, the volume of the content liquid can be increased as compared with the outer shape.

In the embodiments shown in FIGS. 13 and 14,
The holding hole 47 is configured not to function as an exhaust port, but is not limited to this. For example, an exhaust port 41 functioning as a holding hole shown in FIGS. 15 to 20 may be applied to the embodiment of FIGS.
The exhaust port 41 of FIG. 4 is abolished, and the exhaust port 41 of FIG. 15 to FIG.
May be provided. Also, the exhaust port 41 of FIGS. 13 and 14 is left as it is, and instead of the holding hole 47 of FIGS. 13 and 14,
An exhaust port 41 serving also as the holding hole in FIGS. 15 to 20 may be provided. In this case, the number of exhaust ports 41 is two.

[0109] In addition to the above-mentioned heat-insulating water bottle 2,
The present invention can be applied to a device using a metal vacuum insulation container, such as an electric pot, a tabletop thermos, a lunch jar, and a heating pot. In addition, various design changes can be made without changing the gist of the present invention.

[0110]

[Brief description of the drawings]

FIG. 1 is a front sectional view of a heat retaining water bottle according to a first embodiment of the present invention.

FIGS. 2A and 2B are enlarged views of a sealing mechanism shown in a portion D of the heat retaining water bottle in FIG. 1, wherein FIG. 2A is a bottom view and FIG. 2B is a front sectional view in an inverted state.

3A and 3B are enlarged views of a sealing mechanism according to a second embodiment of the present invention, wherein FIG. 3A is a bottom view, and FIG. 3B is a front sectional view in an inverted state.

4A and 4B are enlarged views of a sealing mechanism according to a third embodiment of the present invention, wherein FIG. 4A is a bottom view, and FIG. 4B is a front sectional view in an inverted state.

5A and 5B are enlarged views of a sealing mechanism according to a fourth embodiment of the present invention, wherein FIG. 5A is a bottom view, and FIG. 5B is a front sectional view in an inverted state.

FIGS. 6A and 6B are enlarged views of a sealing mechanism according to a fifth embodiment of the present invention, wherein FIG. 6A is a bottom view and FIG. 6B is a front sectional view in an inverted state.

FIGS. 7A and 7B are enlarged views of a sealing mechanism according to a sixth embodiment of the present invention, wherein FIG. 7A is a bottom view and FIG. 7B is a front sectional view in an inverted state.

8A and 8B are enlarged views of a sealing mechanism according to a seventh embodiment of the present invention, wherein FIG. 8A is a bottom view, and FIG. 8B is a front sectional view in an inverted state.

9A and 9B are enlarged views of a sealing mechanism according to an eighth embodiment of the present invention, wherein FIG. 9A is a bottom view, and FIG. 9B is a front sectional view in an inverted state.

10A and 10B are enlarged views of a sealing mechanism according to a ninth embodiment of the present invention, wherein FIG. 10A is a bottom view, and FIG. 10B is a front sectional view in an inverted state.

FIGS. 11A and 11B are enlarged views of a sealing mechanism according to a tenth embodiment of the present invention, in which FIG. 11A is a bottom view and FIG. 11B is a front sectional view in an inverted state.

12A and 12B are enlarged views of a sealing mechanism according to an eleventh embodiment of the present invention, wherein FIG. 12A is a bottom view, and FIG. 12B is a front sectional view in an inverted state.

FIG. 13 is a front sectional view of a sealing mechanism according to a twelfth embodiment of the present invention in an inverted state.

14A and 14B are enlarged views of a sealing mechanism according to a thirteenth embodiment of the present invention, in which FIG. 14A is a bottom view and FIG. 14B is a front sectional view in an inverted state.

FIG. 15 is a front sectional view of a sealing mechanism according to a fourteenth embodiment of the present invention in an inverted state.

FIG. 16 is a front sectional view of a sealing mechanism according to a fifteenth embodiment of the present invention in an inverted state.

FIG. 17 is a front sectional view of a sealing mechanism according to a sixteenth embodiment of the present invention in an inverted state.

FIG. 18 is a front sectional view of a sealing mechanism according to a seventeenth embodiment of the present invention in an inverted state.

FIG. 19 is a front sectional view of a sealing mechanism according to an eighteenth embodiment of the present invention in an inverted state.

FIG. 20 is a front sectional view of a sealing mechanism according to a nineteenth embodiment of the present invention in an inverted state.

FIG. 21 is a schematic diagram showing an irregular cross section of an exhaust port in the sixteenth to nineteenth embodiments of the present invention.

FIG. 22 is a schematic view showing a modified cross section of a brazing material according to the sixteenth to nineteenth embodiments of the present invention.

FIG. 23 is a front sectional view of a lower part of a heat retaining water bottle in an inverted state according to a twentieth embodiment of the present invention.

FIG. 24 is a front sectional view of a lower part of a heat retaining water bottle in an inverted state according to a twenty-first embodiment of the present invention.

25A and 25B are enlarged views of a sealing mechanism according to a twenty-second embodiment of the present invention, wherein FIG. 25A is a bottom view, and FIG. 25B is a front sectional view in an inverted state.

FIG. 26 is a perspective view of the temporary fixing member of FIG. 25.

FIG. 27 is a front sectional view of a container body of a conventional heat retaining water bottle.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Container main body (metal vacuum insulation container) 11 Inner container 11f Concave part 12 Outer container 14 Bottom part 14d Inclined surface 41 Exhaust port 44 Brazing material 45 Housing recess 45b Side surface 45c 1st part (part on which brazing material is placed) 46 Temporary fixing Member 46c Arm 48 Step 49 Convex F Flow path S Gap

Claims (3)

(57) [Claims] 1. A main body in which a gap is evacuated by a double structure of a metal inner container and an outer container with a gap therebetween, and a brazing material for sealing an exhaust port formed in the main body for evacuating. The brazing filler metal is melted from a solid state, and the exhaust opening is closed by sealing the exhaust opening by sealing the exhaust opening. In the outer container, the brazing filler metal is contained in a solid state and in a loose fit state. An exhaust port is formed in the accommodating concave portion, and a solid-state brazing material is disposed at a position to open the upper portion of the exhaust port, and when the brazing material disposed here is melted. A flow path is formed to flow from the position opening the upper part of the exhaust port so as to close the exhaust port, and the exhaust port is formed in a portion one step higher than a portion on which the bottom surface of the solid brazing material is placed. Metal vacuum insulation container. 2. A main body in which a gap is evacuated by forming a metal inner container and an outer container into a double structure with a gap therebetween, and a brazing material for sealing an exhaust port formed in the main body for evacuating. Wherein the brazing filler metal is melted from a solid state, and the exhaust port is formed in an outer container, wherein the exhaust port is formed in an outer container. The brazing material is temporarily inserted into the exhaust port at
And make contact with the inner container from the gap side.
Metal vacuum insulated container, characterized in Rukoto been Me-decided. 3. A metal inner container and an outer container are separated by a gap.
The main body has a vacuum with a gap as a double structure.
And a brazing material to seal the exhaust port formed in the main body.
This brazing material, by melting from the solid state
In a metal vacuum insulation container that closes the exhaust port and seals the exhaust port
In the above, the exhaust port is formed in the outer container, the brazing material is positioned in a solid state and inserted into the exhaust port,
A metal vacuum heat insulating container , which is temporarily fixed and surrounds the exhaust port and the brazing material to form a step that is one step higher.