JP2019136447A - Metal double container - Google Patents

Abstract

To improve taste when drinking beverages directly from a metal double container.SOLUTION: A metal double container is provided with an insulating layer between a cylindrical inner container 30 and an outer container 20 opened in an upper side. The metal double container includes: a curved return part 33 provided at an opening periphery of the upper edge of the inner container 30, and curved radially outward and extending toward a lower side; and a bonding part 40 where an outer face of the curved return part 33 and an inner face of the upper end of the outer container 20 are bonded. The upper end of the outer container 20 is shaped so that a wall thickness may become thinner slowly toward the tip side.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a metal double container.

  Conventionally, as a portable thermos, a metal double container in which a heat insulating layer is provided by vacuum or the like between an inner container and an outer container is known. For example, a metal double container is formed by placing a space between a bottomed cylindrical inner container and an outer container, and welding the tip of the opening of the inner container and the tip of the opening of the outer container. It is manufactured by vacuuming the air between the outer container and the outer container (see Patent Documents 1 and 2).

JP 2000-333848 A Japanese Patent Laid-Open No. 2006-116628

  By the way, in the metal double container of Patent Document 1, the tip part constituting the opening of the inner container and the tip part constituting the opening of the outer container are joined by so-called welding welding. Thus, an opening portion of the container is formed. When drinking beverages or the like directly from a metal double container while keeping the mouth in contact with the opening, the opening formed by worship welding causes the user to feel an edge and is unpreferable for some users. There is a risk of feeling.

  On the other hand, the metal double container of Patent Document 2 is welded in a state in which the end of the folded portion obtained by bending the front end portion of the inner container is abutted against the stepped portion provided at the end of the outer container, A rounded opening is formed by the folded portion. In the metal double container of Patent Document 2, when drinking a beverage or the like, the edge feeling when the mouth touches the folded portion is suppressed, but if the mouth touches the seam of the welded portion, the user Depending on the situation, the mouthfeel may be unfavorable.

  This invention is made | formed in view of such a situation, and the objective is to make a mouth feel better in the case of drinking a drink etc. directly from a metal double container.

  A metal double container that solves the above problem is a metal double container in which a heat insulating layer is provided between a cylindrical inner container and an outer container that open upward, and the upper end of the inner container. A curved return portion that is provided on the periphery of the opening and extends downward while being curved radially outward, and a joint portion in which the outer surface of the curved return portion and the inner surface of the upper end portion of the outer container are joined, Or a joint portion in which the inner surface of the distal end portion of the curved return portion and the outer surface of the outer container are joined, and of the upper end portion of the outer container and the distal end portion of the curved return portion, the outer side of the joint portion. One of the constituent parts has a shape in which the wall thickness gradually decreases toward the tip side.

  When drinking a drink etc. directly from a metal double container, the part which a user's mouth hits in a metal double container mainly becomes the edge of an opening, or the outer peripheral surface of opening vicinity. When the user's mouth is applied to the edge of the opening of the container, the mouth feel becomes smooth based on the curved surface shape of the curved return portion constituting the edge of the opening. In addition, with respect to the joint portion between the curved return portion and the outer container, one wall portion constituting the outer portion thereof has a shape in which the wall thickness gradually decreases toward the distal end side, so that the joint portion seam is formed. The step becomes smaller. Therefore, even when the user's mouth is applied to the outer peripheral surface in the vicinity of the opening of the container, the mouth feel is smooth and it is difficult to feel the edge feeling due to the joint of the joint. Therefore, the mouthfeel can be made better.

  In the metal double container, provided with a joint portion where the outer surface of the curved return portion and the inner surface of the upper end portion of the outer container are joined, in the portion above the joint portion in the curved return portion, It is preferable that a groove portion extending in the circumferential direction along the tip of the upper end portion of the outer container and recessed inward in the radial direction is provided.

  In the metal double container, provided with a joint portion where the inner surface of the tip portion of the curved return portion and the outer surface of the outer container are joined, the lower portion of the outer container than the joint portion, It is preferable that a groove that extends in the circumferential direction along the tip of the curved return portion and that is recessed radially inward is provided.

  According to each said structure, the spreading of the wetting in the outer surface of metal double containers can be suppressed. That is, the spread of wetting by a liquid such as a beverage adhering to the vicinity of the opening of the metal double container progresses downward along the outer surface of the metal double container, but the groove becomes an obstacle. As a result, the progress (drip) of the liquid below the groove is suppressed.

  Furthermore, according to each said structure, based on the difference in the state of the reflected light based on the hollow shape of a groove part, the position of the edge of a junction part (the upper end of an outer container, or the front-end | tip of a curved return part) in the outer peripheral surface of container vicinity Can be easily grasped visually. Thereby, when the process (for example, quality evaluation which confirms the joining state of a junction part) regarding the junction part of the manufactured metal double container can be performed, the position of a junction part can be specified easily. Processing can be performed smoothly. In addition, if one of the walls constituting the outer part of the joint has a shape in which the wall thickness gradually decreases toward the tip, it becomes difficult to find the edge of the joint directly. It is particularly effective to combine with such a configuration.

  ADVANTAGE OF THE INVENTION According to this invention, when drinking a drink etc. directly from a metal double container, a mouthfeel can be made more favorable.

The half sectional view of the metal double container of a 1st embodiment. The fragmentary sectional view of the vicinity of the junction part in the metal double container of 1st Embodiment. The fragmentary sectional view of the vicinity of the junction part in the metal double container of 2nd Embodiment.

[First Embodiment]
Hereinafter, the metal double container of the first embodiment will be described.
As shown in FIG. 1, the metal double container 10 of the first embodiment (hereinafter sometimes referred to as a double container 10) is a metal outer container having a bottomed cylindrical shape that opens upward. The container 20 includes a metal inner container 30 having a bottomed cylindrical shape that is disposed inside the outer container 20 with a predetermined space therebetween and opens upward. The space S provided between the outer container 20 and the inner container 30 is decompressed to a vacuum or a state close to vacuum, and functions as a heat insulating layer.

  The outer container 20 includes a cylindrical outer peripheral wall 21 and an outer bottom wall 22 that closes the lower end of the outer peripheral wall 21, and is formed in a bottomed cylindrical shape that opens upward as a whole. The outer peripheral wall 21 includes a main body portion 21a having a substantially constant diameter from the lower end thereof, and a first reduced diameter portion 21b having a smaller diameter than the main body portion 21a is provided on the upper portion of the main body portion 21a. On the outer surface of the first reduced diameter portion 21b, a male screw portion 23 that is engaged with a female screw portion of a lid member (not shown) is formed. In addition, a second reduced diameter portion 21c having a diameter smaller than that of the first reduced diameter portion 21b is provided above the first reduced diameter portion 21b in the outer peripheral wall 21. The second reduced diameter portion 21c is provided so as to reach the upper end of the outer container 20, and the upper end portion of the outer container 20 is configured by the second reduced diameter portion 21c.

  The inner container 30 includes a cylindrical inner peripheral wall 31 and an inner bottom wall 32 that closes the lower end of the inner peripheral wall 31, and is formed in a bottomed cylindrical shape that opens upward as a whole. Further, as shown in FIG. 2, the upper peripheral edge of the inner peripheral wall 31 (the upper peripheral edge of the inner container 30) is curved downward from the upper end of the inner peripheral wall 31 toward the outer side in the radial direction. A curved return portion 33 having a shape extending upward (curved shape that is convex upward) is provided. The curved return portion 33 includes a curved curled portion 33a that protrudes upward and a hanging portion 33b that hangs downward from the distal end of the curled portion 33a. .

  As shown in FIG. 2, the double container 10 includes a joint portion 40 in which a second reduced diameter portion 21 c that is an upper end portion of the outer container 20 and a curved return portion 33 of the inner container 30 are joined. More specifically, the inner container 30 is arranged inside the outer container 20 so that the outer surface of the drooping portion 33b in the curved return portion 33 and the inner surface of the second reduced diameter portion 21c of the outer container 20 overlap. The joining portion 40 is a portion where the overlapping portion of the outer surface of the hanging portion 33b and the inner surface of the second reduced diameter portion 21c is joined by welding.

  The second reduced diameter portion 21c, which is a portion constituting the outside of the joint portion 40, is formed in a shape in which the wall thickness gradually decreases toward the tip side (upper end side). More specifically, the outer surface of the second reduced diameter portion 21c is formed in a curved shape that gradually approaches the inner surface of the second reduced diameter portion 21c toward the distal end side. The outer surface of the second reduced diameter portion 21 c is smoothly connected to the outer surface of the hanging portion 33 b of the curved return portion 33 at the tip of the second reduced diameter portion 21 c. The wall thickness of the outer peripheral wall 21 is substantially constant except for the second reduced diameter portion 21c. The wall thickness of the outer peripheral wall 21 is, for example, 0.25 to 0.45 mm.

  In addition, a groove 34 that is recessed inward in the radial direction is provided in a portion above the joint portion 40 (a portion above the tip of the second reduced diameter portion 21 c) in the hanging portion 33 b of the curved return portion 33. . The groove 34 is formed to be recessed in a circular arc shape from a portion where the tip of the second reduced diameter portion 21c is joined, and to extend in the circumferential direction along the tip of the second reduced diameter portion 21c. The inner surface of the groove 34 is formed so as to form a continuous curved surface from the curved outer surface at the tip of the second reduced diameter portion 21c. The groove part 34 is formed by partially reducing the wall thickness of the hanging part 33b, and the maximum depth of the groove part 34 is smaller than the wall thickness of the hanging part 33b. In addition, the wall thickness of the curved return part 33 is 0.20-0.40 mm, for example.

  In FIG. 2, in order to facilitate understanding of the shape of the distal end portion of the second reduced diameter portion 21 c and the shape of the groove portion 34, some dimensions such as the wall thickness are partially enlarged to express the shape. It is shown somewhat extreme.

Next, the operation and effect of the above embodiment will be described.
(1) The metal double container 10 in which a heat insulating layer (space S) is provided between the cylindrical inner container 30 and the outer container 20 that are open on the upper side is provided on the opening periphery of the upper end of the inner container 30. The curved return portion 33 that curves toward the outside in the radial direction and extends downward, and the outer surface of the curved return portion 33 and the inner surface of the upper end portion (second reduced diameter portion 21c) of the outer container 20 are joined. And a joining portion 40. The upper end portion of the outer container 20 has a shape in which the wall thickness gradually decreases toward the tip side.

  When drinking a beverage or the like directly from the double container 10, the portion of the double container 10 that the user's mouth hits is mainly the edge of the opening or the outer peripheral surface near the opening. When the user's mouth is applied to the edge of the opening of the container, the mouth feel becomes smooth based on the curved surface shape of the curved return portion 33 constituting the edge of the opening. In addition, since the distal end portion of the outer container 20 constituting the outer portion of the joint portion 40 has a shape in which the wall thickness gradually decreases toward the distal end side, the step difference of the joint portion 40 is reduced. Therefore, even when the user's mouth is applied to the outer peripheral surface in the vicinity of the opening of the container, the mouth feel is smooth and it is difficult to feel the edge feeling due to the joint portion 40.

  Moreover, according to the said structure which made the upper end part of the outer container 20 the shape whose wall thickness becomes thin gradually toward the front end side, the corner | angular part of a junction part is caught in cloths, such as a user's clothes and a bag. Can also be suppressed.

  (2) In the metal double container of Patent Document 2, welding is performed in a state where the end portion of the folded portion obtained by bending the tip portion of the inner container to the outside is abutted with the stepped portion provided at the end portion of the outer container. However, it is not easy to weld the structure joined by the end portion butting.

  In this respect, according to the above configuration in which the upper end portion of the outer container 20 has a shape in which the wall thickness is gradually reduced toward the tip end side, a joining structure other than joining by end portion butting (for example, as shown in FIG. 2) Such simple joining by joining the end portions) can be employed, and it is easy to simplify the welding operation.

  (3) A groove 34 that extends in the circumferential direction along the tip of the upper end portion of the outer container 20 and that is recessed radially inward is provided at a portion of the curved return portion 33 (hanging portion 33b) above the joint portion 40. Is provided.

  According to the above configuration, the spread of wetting on the outer surface of the double container 10 can be suppressed. That is, the spread of wetting by a liquid such as a beverage adhering to the vicinity of the opening of the double container 10 progresses downward along the outer surface of the double container 10, but the groove 34 is obstructed by the groove 34 becoming an obstacle. The progress of liquid to the lower side (drip) is suppressed. Thus, when the groove part 34 functions as a dripping suppression part, it can suppress that the wide range of the outer surface of the double container 10 becomes a wet state.

  Furthermore, according to the said structure, based on the difference in the state of the reflected light based on the hollow shape of the groove part 34, the position of the edge of the junction part 40 (upper end of the outer container 20) in the outer peripheral surface near opening of a container is easy visually. Can grasp. That is, the groove part 34 functions as an instruction part indicating the position of the joint part 40.

  Thereby, when performing the process (for example, quality evaluation which confirms the joining state of the junction part 40) regarding the junction part 40 of the manufactured double container 10, the position of the junction part 40 can be specified easily, This process can be performed smoothly. In addition, when the upper end portion of the outer container 20 that forms the outside of the joint portion 40 is formed in a shape in which the wall thickness gradually decreases toward the distal end side, it becomes difficult to find the edge of the joint portion 40 directly. Therefore, it is particularly effective to combine with such a configuration.

(4) The maximum depth of the groove part 34 is smaller than the wall thickness of the curved return part 33 (hanging part 33b).
According to the said structure, when the groove part 34 is formed shallowly, even if a user's mouth is applied to the outer peripheral surface of the opening vicinity of a container and a mouth touches the groove part 34, it becomes smooth mouthfeel.

[Second Embodiment]
Hereinafter, the metal double container of the second embodiment will be described. Here, it demonstrates centering on difference with 1st Embodiment. The metal double container of the second embodiment is different from the first embodiment in the configuration of the joint 40 and the groove 34.

  As shown in FIG. 3, the metal double container 10 of the second embodiment includes a second reduced diameter portion 21 c of the outer container 20 and a drooping portion 33 b that is a distal end portion of the curved return portion 33 of the inner container 30. A joined portion 40 is provided. More specifically, the inner container 30 is arranged inside the outer container 20 such that the inner surface of the distal end portion of the hanging portion 33b in the curved return portion 33 and the outer surface of the second reduced diameter portion 21c of the outer container 20 overlap. ing. The joining part 40 is a part where the overlapping part of the inner surface of the tip part of the hanging part 33b and the outer surface of the second reduced diameter part 21c is joined by welding.

  The tip of the drooping portion 33b, which is a portion constituting the outer surface side of the joint portion 40, is formed in a shape in which the wall thickness gradually decreases toward the tip side (lower end side). More specifically, the outer surface of the tip of the drooping portion 33b is formed in a curved shape that gradually approaches the inner surface of the drooping portion 33b as it goes toward the tip. Then, at the tip of the drooping portion 33b, the outer surface of the tip of the drooping portion 33b is smoothly connected to the outer surface of the second reduced diameter portion 21c. The wall thickness of the curved return portion 33 is substantially constant except for the tip of the hanging portion 33b. The wall thickness of the curved return portion 33 is, for example, 0.20 to 0.40 mm.

  In addition, a groove 24 that is recessed inward in the radial direction is provided in a portion below the joint portion 40 in the second reduced diameter portion 21c (a portion below the tip of the hanging portion 33b of the curved return portion 33). ing. The groove 24 is formed to be recessed in a circular arc shape from a portion where the tip of the drooping portion 33b is joined, and to extend in the circumferential direction along the tip of the drooping portion 33b. The inner surface of the groove portion 24 is formed so as to form a continuous curved surface from the curved outer surface at the tip of the hanging portion 33b. The groove portion 24 is formed by partially reducing the wall thickness of the second reduced diameter portion 21c, and the maximum depth of the groove portion 24 is smaller than the wall thickness of the second reduced diameter portion 21c.

  In FIG. 3, in order to facilitate understanding of the shape of the tip portion of the hanging portion 33 b and the shape of the groove portion 24, some dimensions such as the wall thickness are partially enlarged, and the expression is somewhat extreme. Are shown.

Also by the double container 10 of 2nd Embodiment, the effect similar to said (1)-(4) is acquired.
In addition, the said embodiment can be changed and implemented as follows. The above embodiment and the following modification examples can be implemented in combination with each other within a technically consistent range.

  -The shape of the upper end portion (second reduced diameter portion 21c) of the outer container 20 in the first embodiment may be changed within the range of the shape in which the wall thickness gradually decreases toward the distal end side. For example, it is good also as a structure which has an inclined surface-shaped outer surface, and it is good also as a structure which has a curved-surface-shaped part and an inclined surface-shaped part in the outer surface. Moreover, in the said embodiment, although the outer surface of the upper end part of the outer container 20 was connected smoothly with respect to the outer surface of the upper end part of the outer container 20, it may be connected with a slight level | step difference. In addition, you may change about the front-end | tip part (front-end | tip part of the drooping part 33b) of the curved return part 33 in 2nd Embodiment similarly to 1st Embodiment.

  -The hanging part 33b of the curved return part 33 may be omitted. In this case, what is necessary is just to set it as the junction part 40 which joined the part of the front end side which orient | assigns the lower side in the curl part 33a of the curved return part 33, and the outer container 20. FIG.

  -You may change the shape and groove depth of the groove parts 24 and 34. FIG. For example, the groove depth of the groove parts 24 and 34 may be larger than the wall thickness of the wall part where the groove part is provided. When the groove depth of the groove parts 24 and 34 is increased, the function of the groove parts 24 and 34 as a dripping suppression part can be increased. Further, the grooves 24 and 34 may be omitted.

  -The use of the double container 10 of the said embodiment is not specifically limited, It can apply to well-known metal double containers, such as a heat retention container for drinks, and a heat retention container for soups. In addition, the overall shape of the double container 10 is not particularly limited, and can be a shape corresponding to its use.

Next, another technical idea that can be grasped from the above embodiment will be added below.
From the above embodiment, the technical problem of facilitating the grasp of the position of the joint 40 on the outer peripheral surface near the opening of the container, and the technical idea of solving the technical problem by providing the grooves 24 and 34 can be derived. it can. In this aspect, the first embodiment includes the groove portion 34, and the shape of the distal end portion of the outer container 20 is a shape other than the shape in which the wall thickness gradually decreases toward the distal end side (for example, A configuration in which the wall thickness is constant) is also conceivable. Further, regarding the second embodiment, a configuration in which the groove portion 24 is provided and the shape of the distal end portion of the curved turnback portion 33 is a shape other than the shape in which the wall thickness gradually decreases toward the distal end side is also considered. It is done. Also in these cases, the effect of facilitating the grasp of the position of the joint portion 40 on the outer peripheral surface near the opening of the container can be obtained.

  (A) A metallic double container provided with a heat insulating layer between a cylindrical inner container and an outer container that are open on the upper side, provided on the opening periphery of the upper end of the inner container, and radially outward A bent portion extending toward the lower side while being bent toward the bottom, and a joint portion in which an outer surface of the bent portion and the inner surface of the upper end portion of the outer container are joined, and the joint portion in the curved portion A metal double container, characterized in that a groove portion extending in the circumferential direction along the tip of the upper end portion of the outer container and recessed inward in the radial direction is provided in an upper part of the outer container.

  (B) A metal double container provided with a heat insulating layer between a cylindrical inner container and an outer container that are open to the upper side, provided on the opening periphery of the upper end of the inner container, and radially outward A bent portion extending toward the lower side while being bent toward the bottom, and a joint portion in which an inner surface of a tip portion of the bent portion and the outer surface of the outer container are joined, and the joint portion in the outer container A metal double container characterized in that a groove portion extending in the circumferential direction along the tip of the curved return portion and recessed inward in the radial direction is provided in a lower portion than the curved return portion.

S: Space (heat insulation layer), 10: Double container made of metal, 20: Outer container, 21: Outer peripheral wall, 21a ... Main body part, 21b ... First reduced diameter part, 21c ... Second reduced diameter part, 22 ... Outer bottom wall, 23 ... male screw part, 24, 34 ... groove part, 30 ... inner container, 31 ... inner peripheral wall, 32 ... inner bottom wall, 33 ... curved return part, 33a ... curl part, 33b ... drooping part.

Claims (3)

It is a metal double container provided with a heat insulating layer between a cylindrical inner container and an outer container opened on the upper side,
A curved return portion that is provided on the opening periphery of the upper end of the inner container and extends downward while being curved radially outward;
A joint portion where the outer surface of the curved return portion and the inner surface of the upper end portion of the outer container are joined, or a joint portion where the inner surface of the tip portion of the curved return portion and the outer surface of the outer container are joined,
One of the upper end portion of the outer peripheral wall and the distal end portion of the curved return portion, which constitutes a portion outside the joint portion, has a shape in which the wall thickness gradually decreases toward the distal end side. Metal double container. A joining portion in which the outer surface of the curved return portion and the inner surface of the upper end portion of the outer container are joined;
A groove portion extending in the circumferential direction along the tip of the upper end portion of the outer peripheral wall and recessed inward in the radial direction is provided in a portion above the joint portion in the curved return portion. The metal double container according to claim 1. A joining portion in which the inner surface of the distal end portion of the curved return portion and the outer surface of the outer container are joined;
The groove portion that extends in the circumferential direction along the tip of the curved return portion and that is recessed inward in the radial direction is provided in a portion of the outer peripheral wall below the joint portion. 2. A metal double container according to 1.