JP2016093328A - Beverage container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve an adhesive force while suppressing protrusion of an adhesion part for adhering a bottom part of an outer bottle and a protective member of a vacuum double bottle.SOLUTION: A beverage container includes: a vacuum double bottle 1 in which an outer bottle 20 is formed by joining upper side mouth parts 11, 22 of an inner bottle 10 and an outer barrel 21, and by joining a bottom cover 30 to the outer barrel 21, and in which a space between the inner bottle 10 and the outer bottle 20 is made to be vacuum; and a protective member 50 which is adhered to the bottom part of the outer bottle 20 by an adhesion part 40. The bottom cover 30 has a sealed vacuum exhaust outlet 31, a concave surface 32 for surrounding the vacuum exhaust outlet 31, and a horizontal surface 33 formed in the periphery of the concave surface 32. The protective member 50 is adhered to the horizontal surface 33 by the adhesion part 40 made of a thermoplastic adhesive agent, and the adhesion part 40 is made to be a shape having a swollen surface 42b along the concave surface 32.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a beverage container used for carrying a beverage, and more particularly to adhesion between a bottom portion of an outer bottle of a vacuum double bottle and a protective member.

  Conventionally, in a beverage container, a vacuum double bottle comprising a metal inner bottle and an outer bottle has been widely used. The vacuum double bottle is a double insulated container in which the space between the inner bottle and the outer bottle is evacuated. The vacuum exhaust port used for evacuation is formed at the bottom of the outer bottle. After evacuation, the vacuum exhaust port is sealed by brazing or the like. In order to cover the sealed vacuum exhaust port, a protective member is attached to the bottom of the outer bottle.

  As such a beverage container, one in which a plate-like protective member is attached to the bottom of an outer bottle by an adhesive portion is known. The bottom portion of the outer bottle has a concave surface formed so as to surround the vacuum exhaust port, and a horizontal plane formed around the concave surface. The adhesion part is arrange | positioned between the horizontal surface and the protection member (patent document 1).

  In general, hot water cleaning of vacuum double bottles is not recommended, but the user may not know it and may repeat hot water cleaning. In the case of a specific use condition in which high-temperature hot water cleaning is repeated for a long time, the protective member may be peeled off.

  The adhesive part disclosed in Patent Document 1 is made of a film-like modified polyolefin adhesive having a thickness of 30 to 200 μm. With the film-like adhesive part sandwiched between the protective member and the horizontal surface, the bottom part of the outer bottle is heated to melt the adhesive part, and then the bottom part of the outer bottle is cooled, so that the adhesive part is restored. Solidify. Since the modified polyolefin-based adhesive has excellent adhesiveness, it is suitable for the purpose of realizing an adhesive portion that can withstand the above-mentioned specific use conditions even if it is thin.

JP 2011-219126 A

  In the case where an adhesive part made of a film-like thermoplastic adhesive as in Patent Document 1 is adopted, it is required to suppress the melted adhesive part from protruding from the protective member for the aesthetics of the product. There is a limit to the thickness setting.

  However, when the vacuum double bottle is evacuated, the bottom of the outer bottle is subjected to atmospheric pressure. The thickness of the outer bottle is thin, and the horizontal surface is deformed by atmospheric pressure, and warps upward as it is closer to the concave surface. For this reason, a slight gap is generated between the concave side of the warped horizontal plane and the horizontal plate-shaped protective member. Since it is difficult to fill this gap with a film-like adhesive portion, the protective member and the horizontal surface are not completely bonded, and there is a limit to improving the adhesive force.

  Therefore, the problem to be solved by the present invention is to improve the adhesion force of the vacuum double bottle while suppressing the sticking out of the bonding portion that bonds the bottom of the outer bottle and the protective member.

  In order to solve the above problems, the present invention comprises a vacuum double bottle made of a metal inner bottle and an outer bottle, and a protective member attached to the bottom of the outer bottle, the bottom of the outer bottle being And a sealed vacuum exhaust port, a concave surface formed so as to surround the vacuum exhaust port, and a horizontal surface formed around the concave surface, and the protective member is an adhesive made of a thermoplastic adhesive In the beverage container bonded to the horizontal surface by a portion, a configuration is adopted in which the bonding portion is made of a thermoplastic adhesive having a shape having a bulging surface along the concave surface.

  According to this configuration, when the bonding portion melts, the bulging surface is interposed between the concave surface and the protective member so that the bulging surface conforms to the concave surface, so that adhesion is also obtained between the concave surface and the protective member. The adhesive force can be improved by increasing the adhesion area. In addition, since the bulging surface that conforms to the concave surface is only formed on the adhesive part, it can be set to any thickness that prevents the melted adhesive part from sticking out when placed between the horizontal surface and the protective member. It is. Thus, the drink container which has the said structure can improve the adhesive force, suppressing the protrusion of the adhesion part which adhere | attaches the bottom part of an outer bottle, and a protection member.

It is preferable that the bulging surface of the adhesive portion has a shape along the entire circumference of the concave surface.
In this way, the bulging surface can be fitted into the concave surface so that the bonding portion can be properly aligned with the bottom of the outer bottle, and the protective member can be bonded over the entire circumference of the concave surface.

Moreover, it is preferable that the said adhesion part is shape | molded directly on the said protection member.
If it does in this way, since the shape | molded adhesion part has adhered to the protection member, a protection member and an adhesion part can be integrally arrange | positioned at the bottom part of an outer bottle.

Moreover, it is preferable that the display part is formed in the lower surface of the protective member by the etching process or the laser processing.
In this way, it is possible to reliably display information about the product without damaging the thin outer bottle by etching or laser processing.

  As described above, according to the present invention, by adopting the above-described configuration, it is possible to improve the adhesive force while suppressing the protrusion of the bonding portion that bonds the bottom of the outer bottle of the vacuum double bottle and the protection member. .

Partial cutaway longitudinal sectional view of a beverage container according to an embodiment of the present invention Exploded perspective view of inner and outer bottles of the same embodiment The exploded perspective view of the bottom part of the outer bottle of an embodiment same as the above Lower vertical sectional view of the same embodiment Lower enlarged vertical sectional view of the outer bottle of the embodiment same as above Lower enlarged vertical sectional view of the modified example of the adhesive part

  Embodiments of the present invention will be described below with reference to the accompanying drawings. As shown in FIGS. 1 and 2, the beverage container of this embodiment joins the upper mouth part 11 of the inner bottle 10 and the upper mouth part 22 of the outer bottle 20, and covers the bottom of the outer barrel 21 of the outer bottle 20. 30 and a vacuum double bottle 1 in which the space between the inner bottle 10 and the outer bottle 20 is evacuated, and a protective member 50 attached to the bottom of the outer bottle 20 by an adhesive portion 40.

  The inner bottle 10 is composed of an inner body 12 and an inner bottom 13 and is formed into a bottomed cylindrical body for containing a beverage. The inner cylinder 12 has a cylindrical shape that is open both vertically and has an upper opening 11 and a radially outward flange 14 formed at the lower end. A portion of the inner body 12 that is lower than the upper opening 11 is gradually reduced in diameter toward the lower side.

  The upper mouth part 11 of the inner bottle 10 is folded back so as to face downward on the entire outer circumference in the radial direction. The upper mouth portion 11 is a drinking mouth for ingesting a beverage placed in the inner bottle 10.

  The inner bottom 13 has a dish shape and has an outer bent portion 15 that is vertically attached to the flange portion 14. The inner barrel 12 and the inner bottom 13 are joined by welding the flange portion 14 and the outer bent portion 15 all around, thereby forming the inner bottle 10. A getter 13 a is attached to the lower surface of the inner bottom 13.

  The outer surface of the inner bottle 10 is covered with a reflective foil 16 that prevents radiant heat transfer except for the upper mouth portion 11 and the bottom center of the inner bottom 13. The reflective foil 16 is made of, for example, copper foil or aluminum foil, and is tightened to the outer periphery of the inner bottle 10 by a tightening member 17 fitted to the lower end portion of the inner body 12.

  A C-shaped retaining ring is adopted as the fastening member 17. The fastening member 17 is mounted so as to be hooked from above on the entire circumference welded portion of the flange portion 14 and the outer bent portion 15. For this reason, the fastening member 17 is prevented from shifting in the direction of gravity by the entire circumference welded portion.

  The outer barrel 21 of the outer bottle 20 has a cylindrical shape that is open on both the upper and lower sides. And a lower opening 24 that fits into the bottom cover 30 via the stepped portion 23. The portion between the upper mouth portion 22 and the step portion 23 of the outer body 21 is gradually reduced in diameter toward the lower side.

  As shown in FIG. 4, the bottom cover 30 forms the bottom of the outer bottle 20. The bottom cover 30 is formed around a vacuum exhaust port 31 used to evacuate the space between the inner bottle 10 and the outer bottle 20, a concave surface 32 formed so as to surround the vacuum exhaust port 31, and the periphery of the concave surface 32. A horizontal surface 33, a bottom surface peripheral portion 34 which is formed around the horizontal surface 33 and serves as a ground surface on which the vacuum double bottle 1 stands, and a side peripheral portion 35 which rises from the outer edge of the bottom surface peripheral portion 34.

  The side peripheral portion 35 of the bottom cover 30 is fitted into the lower mouth portion 24 of the outer trunk 21 until it hits the stepped portion 23. The side peripheral part 35 and the lower side opening part 24 are welded.

  The vacuum exhaust port 31 is located in the center of the bottom surface of the bottom cover 30 and is sealed with a sealing material 36. The sealing material 36 is in close contact with the upper surface of the cup-shaped portion 37 formed around the vacuum exhaust port 31.

  The concave surface 32 is formed in a conical surface shape that is recessed upward from the horizontal surface 33 toward the upper end portion of the cup-shaped portion 37.

  The horizontal surface 33 has an annular shape that is continuous with the lower end portion of the concave surface 32, and is formed at a position lower than the vacuum exhaust port 31 and higher than the bottom surface peripheral portion 34. Although the processing shape of the horizontal surface 33 is set to be horizontal, the horizontal surface 33 is deformed in an upward direction along with the vacuum exhaust from the vacuum exhaust port 31, and the processing shape of the bottom cover 30 (the shape before the vacuum exhaust) ) Is displaced upward as compared with (). Generally, the plate thickness of the bottom cover 30 is about 0.4 mm. In this case, the above-mentioned upward displacement amount on the concave surface 32 side of the horizontal surface 33 is about 0.3 mm at the maximum.

  An annular portion 38 that is lower than the horizontal surface 33 and higher than the bottom surface peripheral portion 34 is provided between the horizontal surface 33 and the bottom surface peripheral portion 34 to increase the rigidity of the bottom cover 30. .

  The bonding portion 40 is made of a thermoplastic adhesive, and a circular thin portion 41 and a bulging portion 42 that bulges upward from the center thereof are integrated. The thin portion 41 is disposed between the horizontal surface 33 and the protection member 50, and the bulging portion 42 is disposed in the concave surface 32.

  As the bonding part 40, a thermoplastic adhesive mainly composed of a modified polyolefin can be employed as disclosed in Patent Document 1.

  The thin portion 41 is set to a thickness that does not protrude into the annular portion 38 from between the horizontal surface 33 and the protective member 50. Considering the warping deformation of the horizontal surface 33 after evacuation, the thickness of the thin portion 41 is set to 100 to 300 μm, thereby avoiding the above-mentioned protrusion, and the bonding area between the horizontal surface 33 and the thin portion 41. It is preferable to ensure as large as possible.

  As shown in FIG. 5, the bulging portion 42 has a shape having an upper surface 42 a lower than the vacuum exhaust port 31 and a bulging surface 42 b that spreads radially outward from the edge of the upper surface 42 a. Yes. The surface of the bulging portion 42 disposed in the concave surface 32 is shaped to have a bulging surface 42b along the entire circumference of the concave surface 32.

  The protection member 50 is formed of a circular metal plate and is bonded to the horizontal surface 33 by the bonding portion 40. The protective member 50 covers and hides the vacuum exhaust port 31 sealed by the sealing portion 36.

  An adhesive portion 40 is directly formed on the upper surface of the protection member 50. That is, the protective member 50 is placed in a mold for forming the bonding portion 40, and a thermoplastic adhesive is injected. The formed bonded portion 40 is attached to the protective member 50 and is not separated when the protective member 50 is handled (in FIG. 3, it is drawn separately to show the shape of the bonded portion 40).

  As shown in FIG. 3, a display unit 51 is formed on the lower surface of the protection member 50. The display unit 51 is engraved in the protective member 50 by etching or laser processing. The display unit 51 in the figure is the display of the date of manufacture, but the display content of the display unit 51 may be determined as appropriate.

  This beverage container is as described above. As shown in FIGS. 1 and 4, the adhesive portion 40 has a bulging portion 42 having a bulging surface 42 b that conforms to the concave surface 32, and a circular thin-wall portion 41. It is only formed integrally. For this reason, the thin part 41 arrange | positioned between the horizontal surface 33 and the protection member 50 can be set to the arbitrary thickness which suppresses the protrusion of the melt | dissolved adhesion part 40. FIG.

  Further, in this beverage container, the bulging surface 42 b of the bulging portion 42 disposed inside the concave surface 32 is in a state along the entire circumference of the concave surface 32. For this reason, the bulging surface 42b can be fitted to the concave surface 32 so that the bonding portion 40 can be properly aligned with the horizontal surface 33 of the outer bottle 20, and the protective member 50 can be bonded over the entire circumference of the concave surface 32. It is possible to improve the adhesive force by increasing the adhesion area.

  Moreover, since the adhesion part 40 has adhered to the protection member 50, this drink container can arrange | position the protection member 50 and the adhesion part 40 in the horizontal surface 33 of the outer bottle 20 integrally.

  Further, in this beverage container, since the display portion 51 is formed on the lower surface of the protective member 50 by etching or the like, information on the product can be reliably obtained without damaging the thin outer bottle 20 by etching or the like. Can be displayed.

  In addition, the bulging part 42 can also be made into the shape which has the bulging surface 42b along a part of the circumferential direction of the concave surface 32. FIG. In this case, when the bonding portion 40 is melted, the bulging surface 42 b is interposed between the concave surface 32 and the protective member 50 so that the bulging surface 42 b fits into the concave surface 32. For this reason, adhesion is obtained also between the concave surface 32 and the protection member 50, and the adhesive force can be improved by increasing the adhesion area corresponding to this.

  Further, as shown in FIG. 6, the bonding portion 40 may have a shape in which the bulging portion 42 has an upper surface 42 a along the entire lower surface of the cup-shaped portion 37 and a bulging surface 42 b along the entire concave surface 32. Is possible. In this case, the size management of the bonding part 40 and the heat treatment of the bonding part 40 become difficult. However, since the bonding part 40 is also interposed between the cup-shaped part 37 and the protective member 50, the cup-shaped part 37 and the protective member 50 Adhesion is also obtained between the two.

  Further, the bonding portion 40 can be a separate member from the protection member 50. The technical scope of the present invention is not limited to the above-described embodiment, but includes all modifications within the scope of the technical idea based on the description of the scope of claims.

DESCRIPTION OF SYMBOLS 1 Vacuum double bottle 10 Inner bottle 11 Upper mouth part 12 Inner trunk 13 Inner bottom 13a Getter 14 Flange part 15 Outer bending part 16 Reflective foil 17 Tightening member 20 Outer bottle 21 Outer trunk 22 Upper mouth part 23 Step part 24 Lower side Port portion 30 Bottom cover 31 Vacuum exhaust port 32 Concave surface 33 Horizontal surface 34 Bottom surface peripheral portion 35 Side peripheral portion 36 Sealing material 37 Cup-shaped portion 38 Annular portion 40 Adhesive portion 41 Thin portion 42 Expanded portion 42a Upper surface 42b Expanded surface 50 Element

Claims (4)

A vacuum double bottle consisting of a metal inner bottle and an outer bottle, and a protective member attached to the bottom of the outer bottle,
The bottom part of the outer bottle has a sealed vacuum exhaust port, a concave surface formed so as to surround the vacuum exhaust port, and a horizontal surface formed around the concave surface, and the protection member In a beverage container that is adhered to the horizontal surface by an adhesive portion made of a plastic adhesive,
The beverage container, wherein the adhesive portion is made of a thermoplastic adhesive having a bulging surface along the concave surface.   The beverage container according to claim 1, wherein a bulging surface of the adhesive portion is shaped along the entire circumference of the concave surface.   The beverage container according to claim 1 or 2, wherein the adhesive portion is directly formed on the protective member.   The beverage container according to any one of claims 1 to 3, wherein a display portion is formed on the lower surface of the protective member by etching or laser processing.

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