JP2010100337A - Vacuum double structure and manufacturing method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vacuum double structure which is excellent in vibration resistance, and a method for manufacturing the vacuum double structure. <P>SOLUTION: In the vacuum double structure (a vacuum bottle 10) wherein an internal space 30 formed between first and second metal plate sections (an outer container 11 and an inner container 22) faced each other is formed by vacuum evacuation, a plastic deformation section 19 capable of plastically deforming is arranged on the first metal plate section 11 so as to lessen the volume of the internal space 30 by adding external force after performing vacuum evacuation, a core material 31 which has a low thermal conductivity and can be elastically deformed is arranged at a location extending in a direction crossed at a right angle to a deformation direction of the plastic deformation section 19 between the first metal plate section 11 and the second metal plate section 22, the core material 31 is brought into press contact with the first and second metal plate sections 11, 22 on the basis of deformation of the plastic deformation section 19, and the first and second metal plate sections 11, 22 are supported by the core material 31. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vacuum double structure such as a thermos, a vacuum double tube, a vacuum double jacket, a heat insulation tank and a heat insulation panel, and a method for producing the same.

  Among this type of vacuum double structure, a thermos bottle and a heat insulating tank are provided with an inner container and an outer container, and the inner space is sealed by joining them at a mouth located at one end in the axial direction ( Patent Document 1). Moreover, the vacuum double tube and the vacuum double jacket are provided with an inner cylinder and an outer cylinder, and the interior space is sealed by joining them at the openings at both ends. Furthermore, the heat insulation panel includes a pair of metal plates having a substantially concave shape, and the inner space is sealed by joining these edges. And these have the heat insulation performance improved by evacuating the internal space formed between a pair of metal plate parts.

  However, since the vacuum double structure of patent document 1 has joined the outer container and the inner container only by the opening | mouth part, when a vibration is added, an inner container will move in an outer container. In addition, when the full length of the vacuum double tube and the vacuum double jacket joined at the openings at both ends becomes longer, the inner cylinder moves in the outer cylinder at an intermediate position when vibration is similarly applied. For this reason, the inner container or the inner cylinder interferes with the outer container or the outer cylinder and generates an abnormal noise. In the worst case, there is a leak at the junction between the outer container and the inner container or between the outer cylinder and the inner cylinder. There is a problem that occurs.

  In addition, the heat insulating panel joins the outer peripheral edges of a pair of metal plates, and a core material (heat insulating material) having low thermal conductivity and elastically deformable is disposed inside the pair of metal plates. Therefore, the above problem hardly occurs. However, in the case of using a heat insulating panel made of a large number of fibers such as glass wool as the core material, the support force by the core material may be reduced.

Japanese Patent Publication No. 3-54571

  This invention is made | formed in view of the conventional problem, and makes it a subject to provide the vacuum double structure which is excellent in vibration-proof performance, and can maintain the state, and its manufacturing method.

  In order to solve the above problems, a first vacuum double structure of the present invention is a vacuum double structure formed by evacuating an internal space formed between first and second metal plate portions facing each other. The first metal plate portion is provided with a plastically deformable portion that can be plastically deformed by applying an external force after evacuation to reduce the volume of the internal space, and the first metal plate portion and the second metal plate portion A core material having a low thermal conductivity and elastically deformable is disposed at a position extending in a direction orthogonal to the deformation direction by the plastic deformation portion between the first and second core materials by deformation of the plastic deformation portion. The metal plates are pressed against each other and are supported by a core material.

  In this vacuum double structure, since the core material is pressed between the first and second metal plate portions and the first and second metal plate portions can be supported by the core material, the first metal plate portion And the relative movement of the second metal plate portion can be prevented. Therefore, it is possible to prevent the first and second metal plate portions from interfering with each other to generate abnormal noise and to generate a leak at the joint portion. Moreover, since an external force is applied to the plastic deformation portion after evacuation to cause plastic deformation, the deformation amount for each product can be made constant by forming the plastic deformation portion in consideration of the shape after the plastic deformation.

  In this vacuum double structure, when it is pressed through the core material by the plastic deformation of the plastic deformation portion to the pressure contact position of the core material in the second metal plate portion, the elastic deformation is elastically deformable by the pressing force. It is preferable to provide a part. In this way, even if the core material shrinks over time and the elastic supporting force is reduced, the elastic deformation portion is elastically restored, so that the supporting state of the first and second metal plate portions is changed. Can be reliably maintained.

Specifically, the first metal plate portion is an outer container having a first opening opened at one end, and the second metal plate portion is disposed with a predetermined gap inside the outer container. An inner container having a second mouth part sealed to the inner surface of the first mouth part at one end, the plastic deformation part being provided at the bottom of the outer container, and the core material being disposed at the bottom of the outer container. And the bottom of the inner container.
Alternatively, the first metal plate portion is an inner container having a second mouth portion opened at one end, and the second metal plate portion is disposed with a predetermined gap outside the inner container, An outer container having a first mouth part that is joined to the outer surface of the second mouth part in a sealed state, the plastic deformation part is provided at the bottom of the inner container, and the core material is disposed between the bottom of the inner container and the outer container. Between the bottom of the two.

The second vacuum double structure of the present invention is the vacuum double structure formed by evacuating the internal space formed between the first and second metal plate portions facing each other. A plastic deformable portion that can be plastically deformed so that the volume of the internal space is reduced by applying an external force after evacuation to the first metal plate portion and the second metal plate portion, and the first metal plate portion and the second metal plate portion, A core material having a low thermal conductivity and elastically deformable is disposed at a position extending in a direction perpendicular to the deformation direction by the plastic deformation portion between the first and second core materials by the deformation of the plastic deformation portion. Two metal plate portions are pressed against each other, and these are supported by a core material.
In the second vacuum double structure, the same operations and effects as those of the first vacuum double structure can be obtained.

  In the second vacuum double structure, the first metal plate part is an outer container having a first opening opened at one end, and the second metal plate part is provided inside the outer container. And an inner container having a second mouth part sealed to the inner surface of the first mouth part at one end, and the plastic deformation part at the bottom of the outer container and the inner container. The core material is provided between the bottom of the outer container and the inner container.

Moreover, it is preferable that these vacuum double structures provide the holding | maintenance part which hold | maintains the core material before vacuum exhaust in the said 1st metal plate part or the 2nd metal plate part. In this way, since the core material can be positioned at the time of manufacture, workability can be improved.
In this case, it is preferable that the holding portion is formed in a stepped shape by a concave portion or a convex portion. By doing so, it is possible to prevent the core material from being displaced due to the vibration applied over time, so that the supporting state of the first and second metal plate portions can be reliably maintained.

  And this vacuum double structure manufacturing method arrange | positions the core material which has low heat conductivity and can be elastically deformed in the 1st metal plate part or the 2nd metal plate part, and with respect to the said 1st metal plate part. A second metal plate portion is disposed and joined with a predetermined gap, air in the internal space between the first and second metal plate portions is exhausted, and the first metal plate portion and the second metal plate are exhausted. An external force is applied to the plastic deformation portion provided in at least one of the portions, and the plastic deformation portion is plastically deformed so that the volume of the internal space is reduced, whereby the core material is made to be the first metal plate portion and the second metal plate portion. And the first metal plate portion and the second metal plate portion are supported by the core material.

In this manufacturing method, the first metal plate portion is an outer container having a first opening opened at one end, and the second metal plate portion is disposed with a predetermined gap inside the outer container. And an inner container having a second mouth part sealed to the inner surface of the first mouth part at one end, and the plastic deformation part provided in the outer container is plasticized by applying an external force with a pressing machine from the outside. It is preferable to deform.
Alternatively, the first metal plate portion is an inner container having a second mouth portion opened at one end, and the second metal plate portion is disposed with a predetermined gap outside the inner container, An outer container having a first mouth part that is joined to the outer surface of the second mouth part in a sealed state, and a plastic deformation part provided in the inner container is supplied to the inner container by a fluid supplier. Therefore, it is preferable to apply an external force to cause plastic deformation.

  In the vacuum double structure according to the present invention, the core material is pressed between the first and second metal plate portions so that they can be supported with each other. Can be prevented. Moreover, since an external force is applied to the plastic deformation portion after the vacuum exhaust to cause plastic deformation, the amount of deformation for each product can be made constant.

  In addition, since an elastically deformable portion that can be elastically deformed by a pressing force pressed through the core material is provided at the pressure contact position of the core material, the core material contracts over time and the elastic support force decreases. However, the elastically deforming portion is elastically restored, so that the support state of the first and second metal plate portions can be reliably maintained.

It is sectional drawing which shows the thermos which is the vacuum double structure of 1st Embodiment which concerns on this invention. It is sectional drawing which shows the state before the vacuum exhaust of the thermos of FIG. FIG. 3 is an exploded perspective view of the thermos of FIG. 2. It is a principal part perspective view of the thermos of FIG. The thermos bottle of 2nd Embodiment is shown, (A) is sectional drawing which shows the state before evacuation, (B) is sectional drawing which shows the state deform | transformed after evacuation. The thermos bottle of 3rd Embodiment is shown, (A) is sectional drawing which shows the state before evacuation, (B) is sectional drawing which shows the state deform | transformed after evacuation. The thermos bottle of 4th Embodiment is shown, (A) is sectional drawing which shows the state before evacuation, (B) is sectional drawing which shows the state deform | transformed after evacuation. The thermos bottle of 5th Embodiment is shown, (A) is sectional drawing which shows the state before evacuation, (B) is sectional drawing which shows the state deform | transformed after evacuation. The thermos bottle of 6th Embodiment is shown, (A) is sectional drawing which shows the state before evacuation, (B) is sectional drawing which shows the state deform | transformed after evacuation. The thermos bottle of 7th Embodiment is shown, (A) is sectional drawing which shows the state before evacuation, (B) is sectional drawing which shows the state deform | transformed after evacuation. The thermos bottle of 8th Embodiment is shown, (A) is sectional drawing which shows the state before evacuation, (B) is sectional drawing which shows the state deform | transformed after evacuation. The thermos of 9th Embodiment is shown, (A) is sectional drawing which shows the state before evacuation, (B) is sectional drawing which shows the state deform | transformed after evacuation, (C) shows the state before plastic deformation. A principal part sectional view and (D) are principal part sectional views showing a supporting power fall state by a core material. The thermos bottle of 10th Embodiment is shown, (A) is sectional drawing which shows the state before evacuation, (B) is sectional drawing which shows the state deform | transformed after evacuation. The vacuum double tube which is a modification of the vacuum double structure of this invention is shown, (A) is sectional drawing which shows the state before evacuation, (B) is sectional drawing which shows the state deform | transformed after evacuation. is there. The heat insulation panel which is the other modification of the vacuum double structure of this invention is shown, (A) is sectional drawing which shows the state before evacuation, (B) is sectional drawing which shows the state deform | transformed after evacuation. is there.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows a thermos 10 having a vacuum double structure according to the first embodiment of the present invention. The thermos 10 includes a metal outer container 11 and an inner container 22 and evacuates an internal space 30 therebetween. The internal space 30 is provided with a metal foil (not shown) made of copper or aluminum for preventing radiant heat transfer and a getter (not shown) for adsorbing the generated gas. Yes. In this embodiment, a core material 31 for supporting the outer container 11 and the inner container 22 with each other is disposed in the inner space 30.

  The outer container 11 includes an outer body 12 having a cylindrical shape with both end openings made of a stainless steel plate having a thickness of 0.2 to 1.0 mm, and an outer bottom made of a stainless steel plate having a thickness of 0.2 to 1.0 mm. It consists of a body 17.

  The outer body 12 is provided with a first opening 13 communicating with the inside at one end located on the upper side in FIG. Specifically, the outer body 12 includes a conical cylinder part 13a that is continuous with the body part and has a diameter that is gradually reduced upward, and a cylindrical part 13b that is continuous with the upper end edge of the conical cylinder part 13a. The first opening 13 is constituted by the opening at the tip of the cylindrical portion 13b. A bulging portion 14 bulging outward in the radial direction is provided at a lower end of the cylindrical portion 13b at a predetermined interval (90 degrees) in order to position a resin shoulder (not shown). Further, the outer body 12 is provided with a bottom mounting portion 15 having an opening area larger than that of the first mouth portion 13 and slightly reduced in diameter at the other end located on the lower side in FIG. Further, the upper and lower ends of the cylindrical body main body portion, that is, the boundary portion between the conical cylinder portion 13a and the bottom mounting portion 15 are provided with recessed portions 16 that are recessed inward so as to form an annular shape.

The outer bottom body 17 closes the bottom of the outer body 12, has a disk shape with an outer diameter substantially the same as the inner diameter of the bottom mounting portion 15 of the outer body 12, and is fitted into the bottom mounting portion 15. It is joined. The outer bottom body 17 includes an inverted U-shaped edge 18 that is recessed inwardly in an attached state on the outer peripheral portion. The inside of the edge 18 of the outer bottom body 17 is recessed inward (inside the internal space 30) by applying an external force so as to be deformed beyond the elastic limit (yield) point, so that the volume of the internal space 30 is reduced. The plastic deformation portion 19 that is plastically deformed is configured. The plastic deformation portion 19 includes a conical cylinder portion 19a continuous to the edge portion 18 and a disc portion 19b continuous to an end portion of the conical cylinder portion 19a. In this embodiment, this plastic deformation part 19 has the intensity | strength which maintains the state bulged outward (refer FIG. 2) in the state before applying external force. In other words, a suction (exhaust) force (about 1 kg / cm ² ) applied during evacuation of the internal space 30 described later has a strength that does not deform inwardly. An exhaust hole 20 is provided in the center of the disc portion 19b, and a tip tube 21 is joined around the exhaust hole 20 by welding. The tip tube 21 is sealed after the internal space 30 is evacuated and evacuated, and its end is cut so as not to protrude from the outer end of the edge 18.

  The inner container 22 has an inner body 23 having a cylindrical shape with both end openings made of a stainless steel plate having a thickness of 0.2 to 1.0 mm, and an inner bottom made of a stainless steel plate having a thickness of 0.2 to 1.0 mm. The body 26 is disposed inside the outer container 11 with a predetermined gap.

  The inner body 23 has a diameter smaller than that of the outer body 12 so that a predetermined gap is formed with respect to the outer body 12. The inner body 23 is provided with a second opening 24 communicating with the inside at one end located on the upper side in FIG. Specifically, the inner body 23 includes a conical cylinder part 24a that is continuous with the body part and has a diameter that is gradually reduced upward, and a cylindrical part 24b that is continuous with the upper edge of the conical cylinder part 24a. The second opening 24 is constituted by the opening at the tip of the cylindrical portion 24b. The outer diameter of the upper end of the cylindrical portion 24 b is formed substantially the same as the inner diameter of the first mouth portion 13. Further, the inner body 23 is provided with a bottom mounting flange portion 25 having an opening area larger than that of the second mouth portion 24 at the other end located on the lower side in FIG.

  The inner bottom body 26 closes the bottom of the inner body 23 and is curved inward so as to form a substantially hemispherical shape. A cylindrical portion 28 is provided on the outer peripheral edge of the inner bottom body 26 through the curved portion 27 so as to have the same diameter as the main body portion of the inner body 23. A flange portion 29 is provided at the upper end of the cylindrical portion 28 so as to be overlapped and joined to the bottom mounting flange portion 25.

  The outer container 11 and the inner container 22 are hermetically sealed by TIG (Tungsten Inert Gas) welding in which the second opening 24 is positioned inside the first opening 13 and these are used as non-consumable tungsten electrodes. It is fixed (joined). Thereby, an internal space 30 having a predetermined width is formed between the outer container 11 and the inner container 22.

The core material 31 has low thermal conductivity and can be elastically deformed, and is formed by the plastic deformation portion 19 between the outer container 11 that is the first metal plate portion and the inner container 22 that is the second metal plate portion. It is disposed between the outer bottom body 17 and the inner bottom body 26 which are positions extending in a direction orthogonal to the deformation direction. When the plastic deformation portion 19 of the outer container 11 is deformed, the outer container 11 and the inner container 22 are mutually supported by being pressed against the inner bottom body 26 of the opposing inner container 22. It is said. In the present embodiment, a density of about 100~160kg / ^{m 3,} the density after deformation of the plastically deformable portion 19 is using glass wool of about 220 ± 30kg / ^{m 3.}

  Next, a method for manufacturing the thermos bottle 10 will be specifically described.

  First, after the flange portion 29 of the inner bottom body 26 is joined to the bottom mounting flange portion 25 of the inner body 23, a metal foil and a getter are disposed in the inner container 22. As shown in FIGS. 2 and 3, the inner container 22 in this state is the outer container 11 in which the first mouth portion 13 is located on the lower side with the second mouth portion 24 located on the lower side. Is inserted into the outer body 12. Then, after joining the 2nd opening part 24 and the 1st opening part 13 which overlapped inside and outside by welding, the core material 31 is arrange | positioned on the inner bottom body 26. FIG. Next, the undeformed outer bottom body 17 in which the plastic deformation portion 19 bulges outward is fitted into the opening end of the outer body 12 and joined by welding.

  As shown in FIG. 2, the double container before evacuation assembled in this way forms an internal space 30 with a sufficient gap between the outer container 11 and the inner container 22. In addition, a core material 31 is disposed between the outer bottom body 17 of the outer container 11 and the inner bottom body 26 of the inner container 22 so as to support them. A sufficient gap is also formed between the body 17.

  The double container in this state is connected to the tip tube 21 protruding outward, and is heated to a temperature at which the getter is activated while evacuating the air in the internal space 30 to a predetermined pressure. Thereafter, the tip tube 21 is sealed and sealed.

  Finally, the plastic deformation portion 19 bulging outward by a pressing machine such as a press is pressed toward the internal space 30 that is downward in the axial direction, and as shown in FIG. Immerse in 30. As a result, as shown in FIG. 1, the plastic deformation portion 19 is plastically deformed so as to be immersed inward. Further, the core material 31 positioned between the outer bottom body 17 and the inner bottom body 26 is pressed between the outer bottom body 17 and the inner bottom body 26 by the deformation of the plastic deformation portion 19. When this external force is applied, it is preferable to insert a supporting jig into the inner container 22 from the second opening 24 and to support the inner bottom body 26 of the inner container 22 with the jig.

  And the thermos 10 manufactured in this way is elastically deformed between the outer bottom body 17 of the outer container 11 which is the first metal plate part and the inner bottom body 26 of the inner container 22 which is the second metal plate part. Therefore, the core material 31 acts to support the outer container 11 and the inner container 22 with each other. As a result, the outer container 11 and the inner container 22 can be prevented from relatively moving. For this reason, it is possible to prevent the outer container 11 and the inner container 22 from interfering with each other to generate abnormal noise and to prevent leaks from occurring in the mouth portions 13 and 24 that are joint portions. Therefore, the vibration resistance performance of the thermos 10 can be improved.

  Moreover, since the plastic deformation portion 19 that presses the core material 31 is plastically deformed by applying an external force after evacuation, a sufficient ventilation path can be secured during evacuation, and the evacuation operation is not hindered. In addition, by forming the plastic deformation portion 19 in consideration of the shape after plastic deformation, the amount of deformation for each product can be made constant. As a result, the appearance of each product can be prevented from changing, and the accuracy when assembling other members can be improved.

  5A and 5B show the thermos bottle 10 of the second embodiment. This second embodiment is different from the first embodiment in that a holding portion 32 that holds the core material 31 before evacuation is provided on the inner bottom body 26 of the inner container 22 that is the second metal plate portion. ing. In the following embodiment, a state at the time of manufacture in which the top and bottom are reversed is illustrated.

  Specifically, the inner bottom body 26 of the second embodiment has a flat disk shape, and a curved portion 27 is provided so as to bulge outward from the outer peripheral portion thereof. As a result, a holding portion 32 that is recessed inward so as to form a circular shape is formed on the center side of the curved portion 27.

  In the second embodiment configured as described above, the same operation and effect as in the first embodiment can be obtained, and the core material 31 can be positioned and held with respect to the inner bottom body 26 during assembly. Can be improved.

  6A and 6B show a thermos bottle 10 according to the third embodiment. The third embodiment is different from the second embodiment only in that the configuration of the holding unit 32 is changed. Specifically, in the second embodiment, the holding portion 32 is provided so as to be recessed in a circular shape, whereas in the third embodiment, the holding portion 32 is provided so as to bulge into a circular shape. The core material 31 is provided with a holding hole 33 into which the holding portion 32 can be inserted. In the third embodiment configured as described above, the same operations and effects as those of the second embodiment can be obtained.

  7A and 7B show a thermos bottle 10 according to the fourth embodiment. The fourth embodiment is different from the respective embodiments in that the configuration of the plastic deformation portion 36 is changed. Specifically, the outer container 11 of the fourth embodiment includes an outer body 34 composed of a separate body part 35 and a shoulder part 38, and an outer bottom body 40 that closes the lower end opening of the outer body 12. It is said.

  The body portion 35 of the outer body 34 is made of a stainless steel plate having a thickness of 0.2 to 1.0 mm, and is formed in a bellows shape having a wave shape along the axial direction. And the peak part and trough part which are the wave-like parts of this trunk | drum 35 comprise the plastic deformation part 36 deformed plastically so that it may shrink | contract along an axial direction. Mounting flanges 37a and 37b that project outward in the radial direction are provided at the openings at both ends of the body 35, respectively.

  The shoulder portion 38 of the outer body 34 is formed by separately forming the conical cylinder portion 13a and the cylindrical portion 13b of the first embodiment, and is made of a stainless steel plate having a thickness of 0.2 to 1.0 mm. Specifically, the shoulder portion 38 includes a conical cylinder portion 39a and a cylindrical portion 39b that are the same as those in the first embodiment, and the first opening 39 is configured by the tip opening portion of the cylindrical portion 39b. The lower end opening of the shoulder 38 is provided with a flange 39c that is joined to the mounting flange 37a.

  The outer bottom body 40 of the fourth embodiment closes the lower end opening of the outer body 12 and has a disk shape extending in a direction orthogonal to the axial direction that is the deformation direction by the plastic deformation portion 36. A cylindrical portion 42 is provided on the outer peripheral edge of the outer bottom body 40 via the curved portion 41 so as to have the same diameter as the main body portion of the inner body 23. A flange portion 43 is provided at the upper end of the cylindrical portion 42 so as to be overlapped and joined to the mounting flange portion 37b.

  The inner container 22 of the fourth embodiment is different from the first embodiment only in that the inner bottom body 26 is formed in a disk shape extending in parallel to the outer bottom body 40.

  In the fourth embodiment configured as described above, the shoulder portion 38 is joined to the body portion 35 to form the outer body 34, and the first embodiment is performed from the side of the mounting flange portion 37 b opened in the body portion 35. The inner container 22 is disposed similarly to the form, and the mouths 39 and 24 are joined to each other by welding. Next, after the core material 31 is disposed on the exposed inner bottom body 26 of the inner container 22, the outer bottom body 40 is joined to the outer body 34 by welding.

  As shown in FIG. 7A, the double container before evacuation assembled in this way forms an internal space 30 with a sufficient gap between the outer container 11 and the inner container 22. And since the plastic deformation part 36 is an undeformed state, it is between the outer bottom body 40 of the outer container 11 which is a 1st metal plate part, and the inner bottom body 26 of the inner container 22 which is a 2nd metal plate part. The core material 31 for supporting these members is disposed, but a sufficient gap is also formed between the core material 31 and the outer bottom body 40.

  Thereafter, as in the first embodiment, while the air in the inner space 30 between the outer container 11 and the inner container 22 is evacuated and heated to a temperature at which the getter is activated, the tip tube 21 is sealed off. And seal.

  Finally, an external force is applied so as to press the outer bottom body 40 of the outer container 11 in the axial direction by a pressing machine such as a press machine. As a result, as shown in FIG. 7B, the plastic deformation portion 36 having a wavy bellows shape is plastically deformed so as to narrow (shrink) the interval between the adjacent peaks and valleys. Further, the volume (interval) of the internal space 30 between the outer bottom body 40 of the outer container 11 and the inner bottom body 26 of the inner container 22 is reduced by the deformation of the plastic deformation portion 36. As a result, the core material 31 located between them is pressed.

  And the thermos 10 manufactured in this way can acquire the effect | action and effect similar to 1st Embodiment. In the present embodiment, the plastic deformation portion 36 is formed over the entire body portion 35. However, the plastic deformation portion 36 may be provided so as to extend in the circumferential direction only in a part in the axial direction.

  8A and 8B show a thermos bottle 10 according to the fifth embodiment. The fifth embodiment is different from the respective embodiments in that a plastic deformation portion 19 is formed on the outer body 12 similar to the first embodiment.

  Specifically, in the fifth embodiment, in an undeformed state, it bulges outward so as to form an arc shape so as to be located near the lower end opening of the outer body 12 of the outer container 11, and in a plastically deformed state, it is a circle. Plastic deformation portions 19 that are inwardly immersed so as to form an arc shape are provided at a predetermined interval (90 degrees) in the circumferential direction.

  Further, the inner container 22 of the fifth embodiment is configured such that the positions of the flange portions 25 and 29 that join the inner body 23 and the inner bottom body 26 are located above (lower in the drawing) the plastic deformation portion 19. The flange portions 25 and 29 are configured to be used as a placement portion for the core material 31.

  In 5th Embodiment comprised in this way, the inner container 22 is arrange | positioned from the lower end opening part of the outer side body 12, and the opening parts 13 and 24 are joined by welding. Next, after the core material 31 is disposed so as to be positioned between the outer body 12 and the inner body 23, the outer bottom body 17 is joined to the outer body 12 by welding.

  As shown in FIG. 8A, the double container before evacuation assembled in this way forms an internal space 30 with a sufficient gap between the outer container 11 and the inner container 22. Moreover, since the flange portions 25 and 29 protrude from the inner container 22 below the core material 31, the positioning accuracy of the core material 31 with respect to the plastic deformation portion 19 is also good.

  Thereafter, as in the first embodiment, while the air in the inner space 30 between the outer container 11 and the inner container 22 is evacuated and heated to a temperature at which the getter is activated, the tip tube 21 is sealed off. And seal.

  Finally, an external force is applied so as to press the outer body 12 of the outer container 11 in the radial direction by a pressing machine such as a press machine. As a result, as shown in FIG. 8B, the plastic deformation portion 19 is plastically deformed so as to be immersed radially inward. In addition, due to the deformation of the plastic deformation portion 19, a partial volume (interval) of the internal space 30 between the outer body 12 of the outer container 11 and the inner body 23 of the inner container 22 is reduced. As a result, the core material 31 positioned between them is pressed, and the same operation and effect as in the first embodiment can be obtained.

  9A and 9B show a thermos bottle 10 according to the sixth embodiment. The sixth embodiment is different from the respective embodiments in that a holding portion that holds the core material 31 before evacuation is provided on the outer bottom body 17 of the outer container 11 that is the first metal plate portion. . Specifically, as in the first embodiment, the outer bottom body 17 of the sixth embodiment includes an inverted U-shaped edge 18 on the outer peripheral portion, and the inside of the edge 18 serves as a plastic deformation portion 19. . And only the point which made the inside before this plastic deformation part of this plastic deformation part 19 the holding | maintenance part holding the core material 31 is different from 1st Embodiment.

  In the sixth embodiment configured as described above, the same operations and effects as those of the respective embodiments can be obtained, and the core material 31 is positioned and held with respect to the outer bottom body 17 at the time of assembly. Since it can arrange | position to the outer side body 12 which joined | attached, assembly | attachment workability | operativity can be improved.

  10A and 10B show a thermos bottle 10 according to the seventh embodiment. In the seventh embodiment, similarly to the third embodiment, the holding portion 32 is provided so as to bulge in a circular shape, and the plastic deformation portion 19 is provided on the outer peripheral portion of the outer bottom body 17 of the outer container 11. This is different from each embodiment. In addition, in the core material 31 of the present embodiment, a holding hole 33 ′ that is recessed in a circular shape is formed instead of the penetrating holding hole 33 shown in the third embodiment.

  Specifically, the outer bottom body 17 of the seventh embodiment has a disk shape with an outer diameter smaller than that of the outer body 12 and is attached to the bottom mounting portion 15 via a curved portion 44 that is curved in an arc shape on the outer peripheral portion thereof. An edge 18 for joining is formed. In the present embodiment, the bending portion 44 is provided with a plastic deformation portion 19 that immerses inward so as to form an arc shape in a plastic deformation state at a predetermined interval (90 degrees) in the circumferential direction. The plastic deformation portion 19 can be plastically deformed by applying an external force radially inward with a pressing machine. Alternatively, it can be plastically deformed by applying an external force inward along the axial direction. Alternatively, it can be plastically deformed by applying an external force obliquely toward the center of the curved portion. And in 7th Embodiment comprised in this way, the effect | action and effect similar to each embodiment can be acquired.

  FIGS. 11A and 11B show a thermos bottle 10 according to the eighth embodiment. In the eighth embodiment, the core material 31 is disposed between the outer bottom body 17 of the outer container 11 and the inner bottom body 26 of the inner container 22, and the holding portions 32A and 32B of the core material 31 are disposed on the outer bottom body. This is greatly different from each embodiment in that it is provided on both the body 17 and the inner bottom body 26. The core material 31 is provided with a holding hole 33 so as to be located at the center, as in the third embodiment.

  Specifically, as in the first embodiment, the outer bottom body 17 of the eighth embodiment includes an edge portion 18 on the outer peripheral portion, and a plastic deformation portion 19 that is recessed inward by applying an external force to the inside thereof. Is provided. In the present embodiment, a first holding portion 32 </ b> A that is recessed inwardly in a concave shape is provided on the disc portion 19 b located at the center of the plastic deformation portion 19. This holding portion 32A has a smaller diameter than the holding hole 33 of the core material 31, and its axial dimension is held in an assembled state before the plastic deformation portion 19 is deformed, as shown in FIG. As shown in FIG. 11 (B), it is formed so as not to interfere with the inner bottom body 26 facing the inner space 30 in a state after the plastic deformation portion 19 is deformed. ing. An exhaust hole 20 for joining the exhaust tip tube 21 is provided in the center of the holding portion 32A.

  Further, the inner bottom body 26 of the eighth embodiment is obtained by forming the second holding portion 32B in the curved portion 27 located on the outer peripheral portion. The holding portion 32B includes concentric concave portions 32a, 32b, and 32c provided in a plurality (three in this embodiment) so as to form a step shape. The recessed part 32a located in an outer peripheral part is provided with the step part formed in the boundary with the curved part 27, and the flat part extended in a horizontal direction. The recess 32b located in the middle includes a vertical step formed at the boundary with the recess 32a and a flat portion extending in the horizontal direction. The concave portion 32c located inside (center) includes a vertical step portion formed at the boundary with the concave portion 32b and a flat portion extending in the horizontal direction. The concave portion 32c is formed with a diameter larger than the outer diameter of the first holding portion 32A.

  In the eighth embodiment configured as described above, the same operations and effects as those of the second embodiment can be obtained. Moreover, in the eighth embodiment, at the time of assembly, the core material 31 disposed by the second holding portion 32B of the inner container 22 disposed inside is in a state before the outer bottom body 17 is assembled to the outer body 12. Can be positioned. In this state, when the outer bottom body 17 is assembled to the outer body 12, the core material 31 can be reliably positioned by the first holding portion 32 </ b> A of the outer bottom body 17. Therefore, the assembly workability can be improved.

  Further, in a state where the internal space 30 is evacuated and the plastic deformation portion 19 is plastically deformed, as shown in FIG. 11B, each of the holding portions 32B having a stepped shape is formed by compressing the core material 31. The recesses 32a to 32c are in close contact with each other. In addition, in the present embodiment, the core material 31 can be positioned even in the central portion by the holding portion 32 </ b> A of the outer bottom body 17. Therefore, even if vibration is applied over time due to use, the core material 31 can be prevented from being displaced. Therefore, the support state of the outer container 11 and the inner container 22 can be reliably maintained.

  Thus, the thermos 10 of the first to eighth embodiments is a vacuum double structure in which the outer container 11 is the first metal plate part and the inner container 22 is the second metal plate part. Then, the outer container 11 is provided with a plastic deformation portion 19, a core material 31 is disposed at a position extending in a direction orthogonal to the deformation direction of the plastic deformation portion 19, and the core material 31 is deformed by the deformation of the plastic deformation portion 19. It is configured to be in pressure contact. Among them, in the second, third, sixth, and seventh embodiments, holding portions 32, 32 </ b> A, and 32 </ b> B that hold the core material before evacuation are provided on the bottom of the outer container 11 and / or the inner container 22. However, the present invention is not limited to the configurations of these embodiments, and various modifications can be made.

  For example, in the sixth embodiment, the inside of the plastic deformation portion 19 before the plastic deformation is used as the holding portion of the core material 31, but the holding portion 32A that protrudes toward the internal space 30 is provided as in the eighth embodiment. It is good. Further, the holding portion formed on the outer bottom body 17 may be configured to be stepped like the holding portion 32B of the eighth embodiment. Further, the stepped holding portion 32B may be configured with a plurality of convex portions instead of the configuration including the plurality of concave portions 32a to 32c. Of course, in the eighth embodiment, the outer bottom body 17 may not be provided with the holding portion 32A, but the holding portion 32B having a step shape only on the inner bottom body 26 may be formed.

  Moreover, in the above embodiment, the first metal plate portion is the outer container 11, the second metal plate portion is the inner container 22, and the plastic deformation portion 19 is formed in the outer container 11, but the inner container 22 is the first metal plate. It is good also as a structure which forms the plastic deformation part 19 as a part. Below, the structure which provides a plastic deformation part in the inner container 22 is demonstrated concretely.

  FIG. 12 shows a thermos bottle 10 according to the ninth embodiment. In the ninth embodiment, the plastic deformation portion 46 is formed on the inner bottom body 26 of the inner container 22, and the outer bottom body 17 facing the inner space 30 is used as the elastic deformation portion 45. Is different.

  Specifically, the outer bottom body 17 of the ninth embodiment includes an inverted U-shaped edge 18 that is recessed inward in an attached state on the outer peripheral portion. The inside of the edge 18 of the outer bottom body 17 has an elastic deformation portion 45 that is elastically deformed by the pressing force when pressed through the core material 31 by plastic deformation of a plastic deformation portion 46 of the inner bottom body 26 described later. Constitute. The elastic deformation portion 45 includes a conical cylinder portion 45a that is recessed inward to form a conical cylinder shape, and a disc portion 45b that is continuous with an end portion of the conical cylinder portion 45a. The exhaust hole 20 is provided in the center of the disc portion 45b as in the embodiments, and the tip tube 21 is joined around the exhaust hole 20. The elastic deformation part 45 of the present embodiment is configured to be pressed by the deformation of the plastic deformation part 46 via the core material 31 so as not to be deformed beyond the elastic limit point. In other words, the elastic deformation portion 45 is configured by setting a space between the compression rate of the core material 31 and the plastic deformation portion 46 after plastic deformation. Furthermore, in this embodiment, the elasticity of the area | region in the edge part 18 is improved by forming the outer side bottom body 17 with the stainless steel plate whose thickness is less than 0.15-0.9 mm.

  The inner bottom body 26 of the ninth embodiment includes a flange portion 29 and a tube portion 28 for joining to the inner body 23 as in the first embodiment. And the bottom which is the inside of this cylinder part 28 is made into the plastic deformation part 46 which is dented in the internal space 30 by applying external force, and plastically deforms so that the volume of the internal space 30 may become small. The plastic deformation portion 46 includes a conical tube portion 46a continuous to the tube portion 28 and a disc portion 46b continuous to an end portion of the conical tube portion 46a. The plastic deformation portion 46 has a strength to maintain a state before applying an external force, that is, a state in which the inner space 30 is immersed inward (see FIG. 12A) in suction applied when the internal space 30 is evacuated. In the present embodiment, the inner bottom body 26 is formed of a stainless steel plate having a thickness of 0.2 to 1.0 mm that is thicker than the outer bottom body 17 to ensure strength. Further, the plastic deformation portion 46 constitutes a holding portion that holds the core material 31 before being evacuated.

  In the thermos bottle 10 of the ninth embodiment configured as described above, the outer body 12, the outer bottom body 17, the inner body 23, the inner bottom body 26, and the core material 31 are disposed and joined in the same manner as in the first embodiment. Thereby, as shown to FIG. 12 (A), the double container before vacuum exhaust is assembled. In this double container, an internal space 30 having a sufficient gap is formed between the outer container 11 and the inner container 22. Moreover, between the outer bottom body 40 of the outer container 11 that is the second metal plate portion and the inner bottom body 26 of the inner container 22 that is the first metal plate portion, the core material 31 for supporting them mutually. However, since the plastic deformation portion 46 is in an undeformed state, a sufficient gap is also formed between the core material 31 and the outer bottom body 40.

  Then, while the air in the internal space 30 between the outer container 11 and the inner container 22 is evacuated and heated to a temperature at which the getter is activated, the tip tube 21 is sealed and sealed. At this time, since the core material 31 of the present embodiment uses glass wool made of a large number of fibers, the thickness T1 before evacuation shown in FIG. 12A and the evacuation shown in FIG. The later thickness T1 is the same.

  Thereafter, an external force is applied to the plastic deformation portion 46 provided in the inner container 22 to cause plastic deformation. At this time, the plastic deformation portion 46 of the present embodiment is plastically deformed by applying an outward external force from the inside of the inner container 22. Therefore, an external force is applied by a fluid feeder (not shown) capable of injecting fluid into the inner container 22.

  Here, the fluid supply machine has a connection part that can be connected to the second port part 24 in a sealed state, and in a state in which the connection part is connected to the second port part 24, a liquid that is a fluid is predetermined. It is equipped with a compressor that can be injected by pressure. In addition, it is good also as a structure which supplies gas instead of a liquid, and it is good also as a structure which supplies the fluid which mixed the gas-liquid.

When the plastic deformation portion 46 is plastically deformed by applying an external force by supplying the fluid into the inner container 22 in this way, as shown in FIG. 12B, the plastic deformation portion 46 is the same as in each embodiment. Is the amount of deformation as designed in advance and bulges outward (inside the internal space 30), reducing the volume (interval) of the internal space 30 between the bottom bodies 17, 26. Thus, the core material 31 of a density of about 100~160kg / ^{m 3} is pressed such that the density is about 220 ± 30kg / ^{m 3} between the plastically deformed portion 46 and the elastic deformation section 45. As a result, as in the embodiments, the inner and outer containers 11 and 22 are supported by the core material 31 and abnormal noise and leakage can be prevented.

  Further, in the present embodiment, the elastically deformable elastic deformation portion 45 is provided at the pressure contact position of the core material 31 in the outer container 11 which is the second metal plate portion, that is, the position facing the plastic deformation portion 46 of the inner container 22. ing. Therefore, when the core material 31 is pressed by plastic deformation of the plastic deformation portion 46, the elastic deformation portion 45 is elastically deformed outward via the core material 31. Therefore, the elastic deformation of the elastic deformation portion 45 can absorb the assembly error of the outer bottom body 17 and the deformation error of the plastic deformation portion 46. In this state, the thickness T2 of the core material 31 is smaller than the thickness T1 before plastic deformation (T2 <T1).

  On the other hand, since the core material 31 of the present embodiment is formed by intertwining a large number of fibers, when vibration is applied by use, the fibers that are in an intersecting state may be in a parallel state. In this case, the elastic supporting force of the core material 31, that is, the thickness T3 may be reduced (T3 <T2). However, in this embodiment, since the elastic deformation part 45 is provided in the press-contact position of the core material 31 in the outer container 11, as shown in FIG.12 (D), thickness T3 of the core material 31 becomes small. In this case, the elastic deformation portion 45 is elastically restored, so that the pressure contact state of the core material 31 can be maintained. As a result, the support state of the inner and outer containers 11 and 22 by the core material 31 can be reliably maintained.

  The thermos bottle 10 of the ninth embodiment has the plastic deformation portion 46 configured as a holding portion for the core material 31 as in the sixth embodiment, but as in the second, third, and eighth embodiments. Alternatively, the holding portions 32, 32A, and 32B for exclusive use may be provided on the outer bottom body 17 (elastic deformation portion 45) and / or the inner bottom body 26 (plastic deformation portion 46). In the ninth embodiment, the plastic deformation portion 46 is provided in the inner bottom body 26. However, the plastic deformation portion 19 may be provided in the inner body 23 like the plastic deformation portion 19 in the fifth embodiment. In this case, the outer body 12 can be configured as an elastic deformation part by adjusting the distance between the cylindrical outer body 12 and the plastic deformation part after plastic deformation.

  In the first to ninth embodiments, the plastic deformation portions 19, 36, and 46 are provided only on one (first metal plate portion) of the outer container 11 and the inner container 22. It is good also as a structure which provides. Below, the structure which provides a plastic deformation part in both the containers 11 and 22 is demonstrated concretely.

  13A and 13B show the thermos bottle 10 of the tenth embodiment. In the tenth embodiment, the outer container 11 (outer bottom body 17) shown in the first embodiment and the inner container 22 (inner bottom body 26) shown in the ninth embodiment are used.

  In the thermos bottle 10 of the tenth embodiment configured as described above, the outer body 12, the outer bottom body 17, the inner body 23, the inner bottom body 26, and the core material 31 are disposed and joined in the same manner as in the first embodiment. Thereby, as shown to FIG. 13 (A), the double container before vacuum exhaust is assembled. In this double container, an internal space 30 having a sufficient gap is formed between the outer container 11 and the inner container 22. Moreover, since the plastic deformation portions 19 and 46 are provided in the bottom bodies 17 and 26 of both the containers 11 and 22, respectively, the core material 31 is disposed between them, but an extremely large gap is formed. Has been.

  Then, after evacuating the air in the internal space 30 between the outer container 11 and the inner container 22 and heating to a temperature at which the getter is activated, the chip tube 21 is sealed and sealed, both inside and outside The plastic deformation portions 19 and 46 are respectively deformed by applying an external force from the above. In addition, the plastic deformation part 19 of the outer container 11 applies external force with a pressing machine, and the plastic deformation part 46 of the inner container 22 applies external force with a fluid supply machine. These may be performed simultaneously or individually. When performed individually, the order is not limited.

  In the thermos bottle 10 in which the pair of plastic deformation portions 19 and 46 are plastically deformed in this manner, the core material 31 is composed of the outer container 11 (plastic deformation portion 19) and the inner container 22 (plastic deformation portion 46), as in each embodiment. ). For this reason, the inner and outer containers 11 and 22 are supported by the core material 31, and abnormal noise and leakage can be prevented.

  In addition, in this 10th Embodiment, although the plastic deformation parts 19 and 46 were provided in the position which opposes across the internal space 30, you may provide in the different position which does not oppose. In addition, the plastic deformation portion 46 is configured as a holding portion of the core material 31, but the exclusive holding portion 32, the outer bottom body 17 (elastic deformation portion 45) and / or the inner bottom body 26 (plastic deformation portion 46). It is good also as a structure which provides 32A and 32B.

  As described above, according to the present invention, the core material 31 is pressure-contacted by providing the outer container 11 and / or the inner container 22 with the plastic deformation portions 19, 36, 46 and deforming them by applying an external force after evacuation. 31 can support both containers 11 and 22. The core material 31 is arranged so that the formation positions of the plastic deformation portions 19, 36, 46 and the arrangement positions of the corresponding core materials 31 extend in a direction perpendicular to the deformation direction of the plastic deformation portions 19, 36, 46. Once set, it can be changed as desired.

  In addition, the vacuum double structure of this invention and its manufacturing method are not limited to the structure of the said embodiment, A various change is possible.

  For example, in the above-described embodiment, the thermos 10 is described as an example of the vacuum double structure provided with the plastic deformation portions 19, 36, 46 of the present invention. However, from the water passage of the vehicle engine or the water heater The present invention can be similarly applied to a heat insulating tank interposed in a water passage leading to a faucet, and similar actions and effects can be obtained.

  Moreover, the structure of 5th Embodiment does not need the bottom bodies 17 and 26. FIG. Therefore, the structure which provides the plastic deformation part of this invention is not restricted to a double container, It is applicable also to double cylinders which make cylinder shapes, such as a vacuum double tube and a vacuum double jacket. 14A and 14B show an example in which the configuration of the present invention is applied to a vacuum double tube 50. FIG. The vacuum double tube 50 includes an outer cylinder 51 and an inner cylinder 52, and the inner space 54 is hermetically sealed by joining them with joint members 53 and the like at openings at both ends. In this vacuum double tube 50, since the diameters of the outer cylinder 51 and the inner cylinder 52 are uniform, the core material 55 cannot be disposed in a compressed state therebetween. However, in the present invention, the core material 55 is compressed between the outer cylinder 51 and the inner cylinder 52 by, for example, forming plastic deformation portions 56 at predetermined intervals in the circumferential direction at predetermined positions of the outer cylinder 51 as shown in the figure. Can be arranged. As a result, since the outer cylinder 51 and the inner cylinder 52 can be supported by the core material 55, the outer cylinder 51 and the inner cylinder 52 interfere with each other even in the long vacuum double pipe 50. In addition, it is possible to prevent a leak from occurring at the joint portion.

  Furthermore, the structure which provides the plastic deformation part of this invention is applicable also to a heat insulation panel. 15A and 15B show an example in which the configuration of the present invention is applied to a heat insulating panel 60. FIG. This heat insulation panel 60 is provided with a pair of metal plates 61A and 61B having a substantially concave shape, and these outer peripheral edges are joined. A core material 62 is disposed between the metal plates 61A and 61B. Then, as shown in the figure, plastic deformation parts 63 and 63 are provided on the metal plates 61A and 61B, respectively, and the core material 62 is arranged in a compressed state. In this way, the same operations and effects as those of the embodiments can be obtained. Moreover, since the contact area of the heat insulation panel 60 with respect to the heat insulation object can be reduced by arranging the surface provided with the plastic deformation portion 62 so as to contact the heat insulation object, heat transfer can be reduced and heat insulation performance can be reduced. Can be improved. Moreover, since a heat insulation space is formed between the heat insulation object and the plastic deformation part 63, heat insulation performance can be further improved.

10 ... Thermos (vacuum double structure)
11 ... Outer container (first metal plate part)
DESCRIPTION OF SYMBOLS 12, 34 ... Outer side body 13 ... 1st opening part 17 ... Outer bottom body 19, 36 ... Plastic deformation part 20 ... Exhaust hole 21 ... Tip pipe | tube 22 ... Inner container (2nd metal plate part)
23 ... Inner body 24 ... Second mouth part 26 ... Inner bottom body 30 ... Inner space 31 ... Core material 32 ... Holding part

Claims (11)

In the vacuum double structure formed by evacuating the internal space formed between the first and second metal plate portions facing each other,
The first metal plate portion is provided with a plastic deformation portion that can be plastically deformed so that the volume of the internal space is reduced by applying an external force after evacuation,
A core material having low thermal conductivity and elastically deformable is disposed at a position extending in a direction orthogonal to a deformation direction by the plastic deformation portion between the first metal plate portion and the second metal plate portion;
A vacuum double structure characterized in that the core material is pressed by the first and second metal plate portions by deformation of the plastic deformation portion, and these are supported by the core material.   An elastically deformable portion that is elastically deformable by the pressing force when pressed through the core material by plastic deformation of the plastically deformable portion is provided at a pressure contact position of the core material in the second metal plate portion. The vacuum double structure according to claim 1. The first metal plate part is an outer container having a first mouth part opened at one end,
The second metal plate part is an inner container that is disposed inside the outer container with a predetermined gap and has a second mouth part sealed at one end to the inner surface of the first mouth part. ,
3. The vacuum double according to claim 1, wherein the plastic deformation portion is provided on a bottom of the outer container, and the core material is disposed between the bottom of the outer container and the bottom of the inner container. Structure. The first metal plate part is an inner container having a second mouth part opened at one end,
The second metal plate part is an outer container that is disposed outside the inner container with a predetermined gap and has a first mouth part that is joined to the outer surface of the second mouth part in a sealed state at one end. ,
3. The vacuum double according to claim 1, wherein the plastic deformation portion is provided at the bottom of the inner container, and the core material is disposed between the bottom of the inner container and the bottom of the outer container. Structure. In the vacuum double structure formed by evacuating the internal space formed between the first and second metal plate portions facing each other,
Providing the first metal plate portion and the second metal plate portion with a plastically deformable portion that can be plastically deformed so as to reduce the volume of the internal space by applying an external force after evacuation;
A core material having low thermal conductivity and elastically deformable is disposed at a position extending in a direction orthogonal to a deformation direction by the plastic deformation portion between the first metal plate portion and the second metal plate portion;
A vacuum double structure characterized in that the core material is pressed by the first and second metal plate portions by deformation of the plastic deformation portion, and these are supported by the core material. The first metal plate part is an outer container having a first mouth part opened at one end,
The second metal plate part is an inner container that is disposed inside the outer container with a predetermined gap and has a second mouth part sealed at one end to the inner surface of the first mouth part. ,
6. The plastic deformation portion is provided on the bottom of the outer container and the inner container with the inner space being spaced apart, and the core material is disposed between the bottom of the outer container and the inner container. 2. A vacuum double structure according to 1.   6. The vacuum 2 according to claim 1, wherein the first metal plate portion or the second metal plate portion is provided with a holding portion that holds a core material before evacuation. Heavy structure.   The vacuum double structure according to claim 7, wherein the holding portion is formed in a stepped shape by a concave portion or a convex portion. A core material having low thermal conductivity and elastically deformable is disposed on the first metal plate portion or the second metal plate portion,
A second metal plate portion is disposed and bonded to the first metal plate portion with a predetermined gap,
Exhausting the air in the internal space between the first and second metal plate portions;
By applying an external force to the plastic deformation portion provided on at least one of the first metal plate portion and the second metal plate portion and plastically deforming the plastic deformation portion so that the volume of the internal space is reduced, the core material is A method for producing a vacuum double structure, wherein the first metal plate portion and the second metal plate portion are pressed against each other and the first and second metal plate portions are supported by a core material. The first metal plate part is an outer container having a first mouth part opened at one end,
The second metal plate part is an inner container that is disposed inside the outer container with a predetermined gap and has a second mouth part sealed at one end to the inner surface of the first mouth part. ,
The method for producing a vacuum double structure according to claim 9, wherein the plastic deformation portion provided in the outer container is plastically deformed by applying an external force from the outside with a pressing machine. The first metal plate part is an inner container having a second mouth part opened at one end,
The second metal plate part is an outer container that is disposed outside the inner container with a predetermined gap and has a first mouth part that is joined to the outer surface of the second mouth part in a sealed state at one end. ,
10. The vacuum double structure according to claim 9, wherein the plastic deformation portion provided in the inner container is plastically deformed by applying an external force by supplying a fluid into the inner container by a fluid supplier. Production method.

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