JP5402996B2 - Metal vacuum insulated container - Google Patents

Description

  The present invention relates to a metal vacuum insulation container having a metal inner container and an outer container, and a vacuum insulation layer between the two.

  Conventionally, in this type, the mouth portions of the inner container and the outer container are integrated with each other, and an exhaust hole is provided, for example, at the bottom of the outer container, and after exhausting air through the exhaust hole, a sealing material is used. By sealing the exhaust hole, a vacuum heat insulating layer is formed between the inner container and the outer container.

  And since external appearance property and handleability are impaired, what the bottom cover which covers the whole bottom part from the lower side is further fitted as the exterior body of the bottom side of an outer main body is known.

  Moreover, what replaces a bottom cover and covers the outer side of a sealing material with a protective plate is also known. In such a thing, the outer surface of the vacuum heat insulation container main body provided with the sealing material was painted, and the protective plate to which the coating was applied was adhered to the outside of the sealing material.

JP 2000-316729 A

  In the fitting of the bottom cover of a metal vacuum insulation container of the prior art, when the vacuum insulation container is washed, water enters between the bottom cover and the outer container or between the outer bottom and the protective plate through a slight gap, and is sealed. There is a risk that the stopper and the bottom may corrode metal. In such a case, if the corrosion reaches the vacuum heat insulating layer, there is a risk that the heat insulating performance may be reduced due to vacuum breakage.

  The problem to be solved is a metal vacuum insulation that covers the sealing material or bottom part sealing the sealing hole provided in the outer container with a protective plate so as not to impair the appearance and handling. In the container, a slight gap is prevented from being generated between the sealing material side and the protective plate.

The metal vacuum heat insulation container according to the invention of claim 1 has a double wall structure in which the mouth portions of the metal inner container and the outer container are integrated, and the gap between the inner container and the outer container is vacuumed. The exhaust hole is sealed with a sealing material to form a vacuum heat insulating container body , a recess is formed in the outer bottom plate portion of the outer container, and the sealing material is covered outside the sealing material Rutotomoni coercive Mamoruban provided so as to accommodate the protective plate in the recess, the metal vacuum insulated container to coat part or all of the outer surface, the sealing material is a soldering glass material, a metal of the protective plate and is provided inside the adhesive layer of the protective plate between the sealing member, an outer surface of the protective plate is disposed inside the recess, the inner surface of the protective plate and the heat insulating container body the gap between the surface of the recess, Rutotomoni a powder coating layer formed by baking finish by powder coating, this A powder coating layer is continuously provided on the outer surface of the outer bottom plate portion and the outer surface of the protective plate, and the heat resistance temperature of the adhesive layer is 100 ° C. or higher, which is higher than the baking temperature of the powder coating material. It is characterized by being.

The invention of claim 2, Oite to claim 1, the outer surface of the glass brazing material, the same position as the contact surface of the protective plate, or be provided on the inner side of a position deeper than the contact surface of the protective plate It is characterized by.

According to a third aspect of the present invention, in the first or second aspect , the getter provided in the vacuum heat insulating layer is welded within a range facing the bonding surface of the protective plate of the container to which the protective plate is bonded. It is characterized by that.

According to the first aspect of the present invention, the waterproofness / rustproofness of the sealing material by the protective plate can be easily improved by the powder coating layer provided in the gap between the protective plate and the sealing material.

According to the second aspect of the present invention, the outer surface of the glass brazing material is provided at the same position as the close contact surface of the protective plate or at a deep position inside the close contact surface of the protective plate, so that the exhaust hole can be surely provided. Can be sealed.

According to the third aspect of the present invention, the getter is welded to the inner side of the adhesive surface of the protective plate, so that the attachment mark of the getter can be hidden.

According to invention of Claim 1, a sealing material can be reliably protected with a metal protection board.

According to the invention of claim 1 , by setting the heat resistant temperature of the adhesive layer to 100 ° C. or higher, the protective plate does not come off even if it is washed with hot water.

According to the first aspect of the present invention, the coating can be formed in a relatively thick coating layer at one time.

It is a whole longitudinal cross-sectional view which shows Example 1 of this invention. It is an expanded sectional view of the principal part. It is an expanded sectional view showing reference example 1 of the present invention. It is a whole longitudinal cross-sectional view which shows the reference example 2 of this invention. It is an expanded sectional view of the principal part.

  Preferred embodiments of the present invention will be described with reference to the accompanying drawings. The embodiments described below do not limit the contents of the present invention described in the claims. In addition, all of the configurations described below are not necessarily essential requirements of the present invention.

  1 and 2 show Example 1, and a cup as a metal vacuum heat insulating container 1 includes an inner container 4 having an inner bottom plate part 3 at the bottom of the inner cylinder part 2 and an outer container at the bottom of the outer cylinder part 5. An outer container 7 having a bottom plate part 6 is joined to an upper mouth part 8 of each wide mouth, and the inner container 4 and the outer container 7 are each formed of stainless steel, for example, 18-8 stainless steel. The gap between the inner container 4 and the outer container 7 is formed with a vacuum heat insulating layer 9, which is formed at the center of a circular outer bottom plate portion 6 through an exhaust hole 10 communicating between the inside and the outside. After exhausting the gap between the inner container 4 and the outer container 7, the exhaust hole 10 is a sealing material 11, for example, a metal brazing material or glass brazing made of an alloy of Sn or Sn and Ag, Cu, Ni, Bi or Zn. It is sealed with a material.

  The exhaust hole 10 is in the form of a small hole, and the periphery of the exhaust hole 10 has a flat circular shape centered on the exhaust hole 10 and is formed in a shallow concave portion 12 on the vacuum heat insulating layer 9 side. The concave portion 12 is formed in a plurality of stages such that the inner side (vacuum heat insulating layer 9 side) is formed to have a smaller diameter than the outer side, and in three embodiments, the inner side is a flat circular shape centering on the exhaust hole 10. A sealing material 11 is accommodated in the recess 12A, and an intermediate recess 12B disposed concentrically on the outer side of the inner recess 12A has an annular plane and further has an outer recess 12C disposed concentrically on the outer side. Is an annular shape, and its downward outer peripheral edge 12D is formed in a tapered surface so as to increase in diameter as it goes downward with the exhaust hole 10 as the center.

  Then, a protective plate 13 made of metal, in the embodiment, made of stainless steel, for example, 18-8 stainless steel, is provided by loosely fitting in the outer recess 12C. The protective plate 13 covers at least the sealing material 11 with a gap formed by the intermediate recess 12B so that the sealing material 11 does not impair the appearance and handling of the bottom side of the heat insulating container 1. Is a circular thin plate. The outer peripheral edge 13A of the protective plate 13 is arranged in a wider range than the outer peripheral edge 11A of the sealing material 11 so as to cover the entire sealing material 11, and the inner side surface of the protective plate 13 on the outer peripheral edge 13A side, that is, vacuum insulation. The surface on the layer 9 side is in close contact with the surface of the outer recess 12C via an adhesive layer 14, while the outer surface facing downward of the protective plate 13 is disposed inside the outer recess 12C.

  Then, coating layers 15, 16, and 17 are provided on the outer surface of the outer cylinder portion 5, the outer surface of the outer bottom plate portion 6, and the outer surface of the protection plate 13, respectively. These coating layers 15, 16, and 17 are formed continuously in the same coating process. Therefore, the coating layer 16 on the outer surface of the outer bottom plate 6 and the coating layer 17 on the outer surface of the protective plate 13 are coated. The first gap A between the outer peripheral edge 12D of the outer recessed portion 12C and the outer peripheral edge 13A of the protective plate 13, and the second gap between the surface of the outer recessed portion 12C at the back and the inner side surface of the protective plate 13 A film is formed after B is filled with a paint. As a result, the first gap paint layer 18 is provided between the paint layer 16 and the paint layer 17 so that the paint is accumulated in the first gap A, and the paint is accumulated in the second gap B. A second gap coating layer 19 is provided between the first gap coating layer 18 and the outer peripheral edge 14A of the adhesive layer 14.

  In the embodiment, the coating layers 15, 16, 17 and the gap coating layers 18, 19 whose surfaces are open to the atmosphere are formed by baking coating with a powder paint having a film thickness C of about 30 to 150 μm. For this reason, the heat resistance temperature of the adhesive used for the adhesive layer 14 is 100 ° C. or higher, and is formed with a temperature higher than the baking temperature of the powder coating material. In the embodiment, since the baking temperature of baking coating with a powder coating is generally 190 to 220 ° C., the adhesive layer 14 is made of, for example, an adhesive polyolefin (melting temperature 220 to 240 ° C.) having high heat resistance. . Powder coating uses powder paint that contains only coating film forming components and does not use organic solvents, water, or other solvents in the paint. Using pressurized air as a means, coating is performed mainly by electrostatic powder coating method and fluidized immersion method. In the electrostatic powder coating method, baking is performed from the time of coating in a powder state through heating, and film formation is performed through deaeration and a smooth curing reaction. In particular, compared to liquid coating, powder coating can be applied at once, with a film thickness C of, for example, about 30 to 150 μm, and a sufficient coating thickness can be ensured even once in the coating process. This coating is useful for improving the adhesive strength of 13 and improving the production efficiency. In powder coating, a thin film thickness that can be applied at a time is about 25 to 35 μm, and a thick film thickness that can be applied at a time can be set to 300 to 2,000 μm by adopting a preheating method.

  A getter 20 is attached to the surface of the outer bottom plate 6 on the side of the vacuum heat insulating layer 9 via a welded portion 20A such as spot welding, and the getter 20 adsorbs gas generated from the inner surface of the vacuum heat insulating layer 9. The attachment position of the getter 20 is welded to the inner side of the adhesion surface of the protection plate 13 by the adhesive layer 14 in plan view so that the trace of the welded portion 20A is hidden by the protection plate 13. Also, when painting the outer surface coating layer 16, the outer surface coating layer 17, the first gap coating layer 18, the second gap coating layer 19, etc., the outer bottom plate 6 is applied upward, and the mouth is the outermost. It is smaller than the diameter. Without putting a mouth on the thickened paint layer 15, you can drink directly by putting a mouth on the upper mouth part 8 of stainless steel so that you will not feel the discomfort due to the thickened paint layer when drinking Yes.

  Next, the operation of the above configuration will be described. Hot water, cold water, or the like stored in the heat insulating container 1 is kept warm or cold by the vacuum heat insulating layer 9 provided so as to surround it.

  And when washing the whole container with hot water etc., even if water tries to infiltrate to the sealing material 11 or the recessed part 12 through the gaps A and B, the gap coating layer 18 provided in the gaps A and B, 19 prevents water from entering and prevents the sealing material 11 from corroding.

  As described above, in the above-described embodiment, the space between the inner container 4 and the outer container 7 is evacuated, and the exhaust hole 10 is sealed with the sealing material 11 to form the vacuum heat insulating layer 9. In the metal vacuum insulation container 1 provided with the protective plate 13 on the outer concave portion 12 in the concave portion 12 so as to face the outer peripheral edge 14A of the adhesive layer 14 between the outer concave portion 12C in the outer bottom plate portion 6 and the protective plate 13. By filling the slight gaps A and B between the surface of 12C and the protective plate 13 with the gap coating layers 18 and 19, moisture enters the sealing material 11 or the recess 12 when the vacuum heat insulating container 1 is washed with water. Therefore, the metal corrosion of the sealing material 11 or the recess 12 and further the deterioration of the heat insulation performance due to the corrosion can be prevented more completely. In addition, a coating layer 16 that is in close contact with the outer bottom plate portion 6 is connected to the coating layer 17 on the outer side surface of the protective plate 13 through the first gap coating layer 18 and is in close contact with the surface of the recess 12 by the coating process. By connecting the second gap coating layer 19, the protective plate 13 can be firmly attached to the outer bottom plate portion 6.

Further, the sealing material 11 is a glass brazing material, and the outer surface of the glass brazing material is provided on the back side, that is, at a deeper position than the adhesion surface formed by the adhesive layer 14 of the protective plate 13, The exhaust hole 10 can be reliably sealed.

  Furthermore, the getter 20 provided on the vacuum heat insulating layer 9 side of the outer recessed portion 12C via the welded portion 20A is welded to the inner side of the bonding surface of the protective plate 13, so that the welded portion that appears on the outer side of the outer recessed portion 12C. The trace of 20A can be covered with the protective plate 13 and concealed, and the deterioration of aesthetics can be prevented.

  In addition, by setting the heat resistance temperature of the adhesive layer 14 to 100 ° C. or higher, the metal vacuum insulation container 1 such as a cup is housed in a dishwasher (not shown) for washing with hot water and washed. However, there is no fear that the protective plate 13 will come off, and when the protective plate 13 is provided on the outer bottom plate portion 6 such as a cup via the adhesive layer 14, the heat resistance of the product is also increased.

  In addition, since the temperature must be increased during metal coating, the adhesive may be melted and the protective plate may be displaced or disengaged. If the melting point is high, the coating changes color when bonded. And when melting | fusing point of an adhesive agent is low, since the heat resistance of goods will become low, it is difficult to establish the production conditions for adhesion | attachment of a protection board. However, production conditions can be established by using a material having a high melting point for the adhesive.

  In particular, in the embodiment, the coating layers 15, 16, 17 and the gap coating layers 18, 19 can be formed as a powder coating layer, so that the film thickness that can be applied at one time can be formed as thick as 30 to 150 μm. A sufficient film thickness can be ensured even if the coating process is performed once or several times. As a result, the gap coating layers 18 and 19 by powder coating improve the water tightness, improve the adhesive strength of the protective plate 13, and Production efficiency can be improved. Moreover, in the powder coating layer, the penetration into the first gap A and the second gap B during coating is uniform, and there is no occurrence of foaming of the paint or non-uniform accumulation.

  Further, the coating layer 15, the coating layer 16, the coating layer 17, and the gap coating layer 18 are connected to the outer surface of the outer cylinder portion 5, the outer surface of the bottom plate portion of the outer container 7, and the outer surface of the protective plate 13. By painting together, it can be unified with the same color on the appearance, it has excellent design, and there is no need to provide a paint layer 17 separately from the paint layer 15, paint layer 16, etc., so productivity without increasing the manufacturing process Can be improved.

Reference example 1
Other reference examples will be described below. In addition, the same code | symbol is attached | subjected to the same part as the said Example 1, and the detailed description is abbreviate | omitted.

FIG. 3 shows Reference Example 1 , and a protective plate 13 ′ is provided by loosely fitting in the outer recess 12 </ b> C of the outer bottom plate 6 in the cup as the metal vacuum heat insulating container 1. This protective plate 13 ′ is covered with a sealing material 11 so that the appearance and handling on the bottom side of the heat insulating container 1 are not impaired, and an adhesive layer 14 interposed between the outer recess 12 C and the protective plate 13. The outer peripheral edge 14'A of 'is protruded from the outer peripheral edge 13'A of the protective plate 13' and is accommodated in the outer recess 12C. Then, coating layers 15 ′, 16 ′, and 17 ′ are provided on the outer surface of the outer cylinder portion 5, the outer surface of the outer bottom plate portion 6, and the outer surface of the protective plate 13 ′, respectively, and the coating layers 16 ′ and 17 ′. In order to connect the gaps, a gap coating layer 18 ′ is provided in the first gap A. These coating layers 15 ', 16', 17 ', and 18' use liquid paint (solvent paint), and after using the liquid paint (solvent paint) to form the undercoat layer 21 in the first baking process, use the liquid paint again. Then, an upper coating layer 22 is formed on the lower coating layer 21 by continuously performing the two baking coating processes, so that the coating layer 16 'and the protective plate on the outer surface of the outer bottom plate portion 6 are formed. In the process of coating the undercoat layer 21 of each of the paint layers 17 'on the outer surface of 13', generally including 120-180 on the outer peripheral edge 14'A where the paint enters the first gap A. The film is formed at a baking temperature of ° C. As a result, the undercoating of the first gap coating layer 18 'interposed between the undercoating layer 21 of the coating layer 16' and the undercoating layer 21 of the coating layer 17 'so that the paint accumulates in the first gap A. Layer 21 is provided. Again, a liquid paint is applied onto the lower coating layer 21, and the upper coating layer 22 is formed at the baking temperature. The undercoating layer 21 and the upper coating layer 22 are formed so as not to be visible through the outer peripheral edge 14'A so as to hide the outer peripheral edge 14'A side of the protruding adhesive layer 14 '.

As described above, in the above-described reference example, when the vacuum insulation container 1 is washed with water by filling the gap A between the surface of the outer recess 12C of the recess 12 and the slight gap A between the protective plate 13 ', the water is removed. Is prevented from entering the sealing material or the recess 12 side.

  Furthermore, in the embodiment, the outer peripheral edge 14'A of the adhesive layer 14 'protrudes outside the outer peripheral edge 13'A of the protective plate 13' so that the entire upper surface of the protective plate 13 'can be used as the adhesive surface. The protruding adhesive layer 14 ′ has a poor appearance due to paint accumulation, but by providing the gap coating layer 18 ′ at that location, it is possible to prevent a decrease in the appearance of the appearance.

  Moreover, the coating layers 15 ′, 16 ′, 17 ′, and 18 ′ are doubled so that the upper coating layer 22 is provided on the lower coating layer 21, and moreover multiple layers such as triple and quadruple, Although the appearance around the outer peripheral edge 13'A is poor in the lower coating layer 21, the deterioration of the appearance can be prevented by providing the upper coating layer 22 in an overlapping manner.

Reference example 2
FIGS. 4 to 5 show Reference Example 2, which shows a beverage container such as a thermos as a metal vacuum heat insulating container 1 ′, and joins the upper and lower narrow mouth portions 8 of the inner container 4 and the outer container 7 together. A plurality of concave portions 12 having a circular plane provided in the outer bottom plate portion 6 of the outer container 7 of the heat insulating container 1 'are provided in two stages in the embodiment, a deep inner concave portion 12A in the central portion, and an outer portion on the outer side. A recess 12 </ b> C is provided, and an outer edge 12 </ b> A of the third recess 12 is continuous with the outer bottom plate 6.

  A sealing material 11 is provided so as to seal the exhaust hole 10 provided in the center of the inner recess 12A, and a protective plate 13 ″ is provided so as to cover the sealing material 11 in the outer recess 12C. ing. The protective plate 13 ″ is in close contact with the surface of the outer concave portion 12C by an adhesive layer 14 ″ having a plane substantially the same size as the protective plate 13 ″. Note that the adhesive layer 14 ″ is for attaching integrally with the protective plate 13 ″.

  Then, on the outer surface of the outer cylinder 5, the outer surface of the outer bottom plate 6, and the outer surface of the protective plate 13 ″, coating layers 15 ″, 16 ″ formed by the same powder coating process, 17 ″ is provided, and the coating layer 16 ″ of the outer bottom plate 6 and the coating layer 17 ″ of the protective plate 13 are formed by the outer peripheral edge 13 ″ A of the protective plate 13 ″ and the outer peripheral edge 12D of the outer recess 12C. Are connected via a gap coating layer 23 accumulated in the gap.

  Therefore, as in Example 1, when the heat insulating container 1 ′ is washed with water, moisture is prevented from entering the inner concave portion 12A side by the gap coating layer 23, and the metal corrosion of the sealing material 11 or the concave portion 12 is further reduced. Can more completely prevent the deterioration of the thermal insulation performance due to corrosion.

  As described above, the metal vacuum insulated container according to the present invention can be applied to various uses.

1 Insulated container 4 Inner container
6 outer bottom plate part 7 outer container 8 upper mouth part 9 vacuum heat insulating layer
10 Exhaust hole
11 Encapsulant
12 Outer recess (recess)
13 Protection plate
14 14´ 14´´ Adhesive layer
18 18´ 19 23 Clearance coating layer
20 Getter
21 Undercoat layer
22 Top coating layer

Claims (3)

The metal inner container and the outer container are integrated with each other to form a double wall structure, and the gap between the inner container and the outer container is evacuated and the exhaust hole is sealed with a sealing material. sealed to form a vacuum insulated container body, a recess in the outer bottom plate portion of said outer container, provided the coercive Mamoruban so as to cover the sealing material on the outside of the sealing material Rutotomoni, the protective plate In the metal vacuum heat insulating container that coats a part or the whole of the outer surface, the sealing material is a glass brazing material, and protection between the protective plate made of metal and the sealing material An adhesive layer is provided on the inner side of the plate, the outer surface of the protective plate is disposed inside the concave portion, and is baked with a powder paint in the gap between the inner side surface of the protective plate and the surface of the concave portion of the heat insulating container body. the powder coating layer provided by coating Rutotomoni, outer surface and the front of the outer bottom plate portion of this powder coating layer Provided continuously to the outer surface of the protective plate, the heat resistant temperature of the adhesive layer is a at 100 ° C. or higher, a metal vacuum insulated container, characterized in that than the baking temperature of the powder coating material is a high temperature. Outer surface of the glass brazing material, the same position as the contact surface of the protective plate, or a metal vacuum insulation according to claim 1 Symbol mounting, characterized in that provided inside the position deeper than the contact surface of the protective plate container. The getter provided in the said vacuum heat insulation layer is welded in the range facing the adhesion surface of the said protection plate of the said container to which the said protection plate adhere | attaches, The metal made of Claim 1 or 2 characterized by the above-mentioned. Vacuum insulated container.

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