JP7103802B2 - Double metal container - Google Patents

Description

The present invention relates to a metal double container.

Conventionally, as a portable thermos bottle or the like, a metal double container in which a heat insulating layer is provided between an inner container and an outer container by a vacuum or the like is known. In the metal double container, for example, a space is arranged between the bottomed cylindrical inner container and the outer container, the tip of the opening of the inner container and the tip of the opening of the outer container are welded, and then the inner container is formed. It is manufactured by vacuum sucking the air between the container and the outer container (see Patent Documents 1 and 2).

Japanese Unexamined Patent Publication No. 2000-333848 Japanese Unexamined Patent Publication No. 2016-116628

By the way, in the metal double container of Patent Document 1, the tip portion forming the opening of the inner container and the tip portion forming the opening of the outer container are joined by so-called worship welding, and the joint portion by worship welding. The opening of the container is formed by. When drinking a beverage or the like directly from a metal double container while touching the opening, the opening formed by worship welding gives the user a feeling of edge, which is not preferable for some users. You may feel that.

On the other hand, the metal double container of Patent Document 2 is welded in a state where the end portion of the folded portion in which the tip portion of the inner container is bent outward is abutted against the stepped portion provided at the end portion 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 directly, the edge feeling when the mouth touches the folded part is suppressed, but when the mouth touches the seam of the welded part, the user Depending on the taste, you may feel that the taste is not good.

The present invention has been made in view of such circumstances, and an object of the present invention is to improve the mouthfeel when drinking a beverage or the like directly from a metal double container.

The metal double container that solves the above problems is a metal double container provided with a heat insulating layer between a cylindrical inner container and an outer container that opens upward, and is an upper end of the inner container. A curved return portion provided on the peripheral edge of the opening of the container and extending downward while curving outward in the radial direction, 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. Alternatively, it is provided with a joint portion in which the inner surface of the tip 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 tip end portion of the curved return portion, the outer side of the joint portion. One of the portions is shaped so that the wall thickness gradually decreases toward the tip side thereof.

When drinking a beverage or the like directly from a metal double container, the portion of the metal double container that the user's mouth touches is mainly the edge of the opening or the outer peripheral surface near the opening. When the user's mouth is in contact with the edge of the opening of the container, the mouthfeel is smooth based on the curved shape of the curved barb forming the edge of the opening. Further, regarding 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 tip side, so that the joint portion of the joint portion is jointed. The step becomes smaller. Therefore, even when the user's mouth is applied to the outer peripheral surface near the opening of the container, the mouth feel is smooth and the edge feeling due to the seam of the joint is hard to be felt. Therefore, the mouthfeel can be improved.

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

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

According to each of the above configurations, the spread of wetting on the outer surface of the metal double container can be suppressed. That is, the spread of wetting due to the 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 portion becomes an obstacle. As a result, the progress of the liquid (dripping) below the groove is suppressed.

Further, according to each of the above configurations, the position of the edge of the joint (the upper end of the outer container or the tip of the curved return portion) on the outer peripheral surface near the opening of the container is based on the difference in the state of the reflected light based on the concave shape of the groove. Can be easily grasped visually. As a result, the position of the joint can be easily specified when processing the joint of the manufactured metal double container (for example, quality evaluation for confirming the joint state of the joint). The processing can be performed smoothly. If one of the wall portions constituting the outer portion of the joint portion has a shape in which the wall thickness gradually decreases toward the tip side, it will be difficult to directly find the edge of the joint portion. , It is especially effective to combine with such a configuration.

According to the present invention, when a beverage or the like is drunk directly from a metal double container, the mouthfeel can be improved.

A half cross-sectional view of the metal double container of the first embodiment. FIG. 3 is a partial cross-sectional view of the vicinity of the joint in the metal double container of the first embodiment. FIG. 3 is a partial cross-sectional view of the vicinity of the joint in the metal double container of the second 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, may be referred to as a double container 10) is a metal outer surface having a bottomed cylinder shape that opens upward. A container 20 and a metal inner container 30 having a bottomed cylinder shape, which is arranged inside the outer container 20 with a predetermined space and opens upward, are provided. The space S provided between the outer container 20 and the inner container 30 is decompressed to a vacuum or a state close to a 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 tubular shape that opens upward as a whole. The outer peripheral wall 21 includes a main body portion 21a whose diameter is substantially constant from the lower end thereof, and a first reduced diameter portion 21b having a diameter smaller than that of 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 engages with a female screw portion of a lid member (not shown) is formed. Further, 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 on 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 formed 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 tubular shape that opens upward as a whole. Further, as shown in FIG. 2, the upper opening peripheral edge of the inner peripheral wall 31 (the opening peripheral edge of the upper end of the inner container 30) is curved outward in the radial direction from the upper end portion of the inner peripheral wall 31 and faces downward. A curved return portion 33 having a shape extending vertically (curved shape that is convex upward) is provided. The curved return portion 33 is located on the base end side thereof, and includes a curved curl portion 33a that is convex upward and a hanging portion 33b that hangs downward from the tip of the curl portion 33a. ..

As shown in FIG. 2, the double container 10 includes a joint portion 40 in which the second reduced diameter portion 21c, which is the upper end portion of the outer container 20, and the curved return portion 33 of the inner container 30 are joined. More specifically, inside the outer container 20, the inner container 30 is arranged so that the outer surface of the hanging portion 33b of the curved return portion 33 and the inner surface of the second reduced diameter portion 21c of the outer container 20 overlap. The joint portion 40 is a portion where the overlapping portion between 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 diameter-reduced portion 21c, which is a portion constituting the outer side of the joint portion 40, is formed in a shape in which the wall thickness gradually decreases toward the tip end side (upper end side) thereof. More specifically, the outer surface of the second reduced diameter portion 21c is formed in a curved surface shape that gradually approaches the inner surface of the second reduced diameter portion 21c toward the tip end side. Then, at the tip of the second reduced diameter portion 21c, the outer surface of the second reduced diameter portion 21c is smoothly connected to the outer surface of the hanging portion 33b of the curved return portion 33. 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.

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

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

Next, the action and effect of the above embodiment will be described.
(1) A metal double container 10 provided with a heat insulating layer (space S) between the cylindrical inner container 30 and the outer container 20 that opens on the upper side is provided on the peripheral edge of the opening at the upper end of the inner container 30. The curved return portion 33 that curves outward in the radial direction and extends downward, the outer surface of the curved return portion 33, and the inner surface of the upper end portion (second diameter reduction portion 21c) of the outer container 20 are joined. It is provided with a joint portion 40. The upper end portion of the outer container 20 has a shape in which the wall thickness gradually decreases toward the tip end side.

When drinking a beverage or the like directly from the double container 10, the portion of the double container 10 where the user's mouth touches is mainly the edge of the opening or the outer peripheral surface near the opening. When the user's mouth is in contact with the edge of the opening of the container, the mouth feel is smooth based on the curved shape of the curved barb 33 forming the edge of the opening. Further, since the tip 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 tip end side, the step at the joint of the joint portion 40 becomes smaller. Therefore, even when the user's mouth is applied to the outer peripheral surface near the opening of the container, the joint portion 40 has a smooth mouthfeel that makes it difficult to feel the edge feeling.

Further, according to the above configuration in which the upper end portion of the outer container 20 has a shape in which the wall thickness gradually decreases toward the tip end side, the corner portion of the joint portion is caught by the cloth such as the user's clothes or bag. Can also be suppressed.

(2) In the metal double container of Patent Document 2, the tip of the inner container is bent outward and the end of the folded portion is welded so as to abut against the stepped portion provided at the end of the outer container. However, it is not easy to weld the structure that is joined by butt-butting the ends.

In this regard, according to the above configuration in which the upper end portion of the outer container 20 has a shape in which the wall thickness gradually decreases toward the tip end side, a joining structure other than joining by abutting of the end portions (for example, shown in FIG. 2). (Joining by superimposing simple ends) can also be adopted, and it is easy to simplify the welding work.

(3) In the portion of the curved return portion 33 (hanging portion 33b) above the joint portion 40, a groove portion 34 extending in the circumferential direction along the tip of the upper end portion of the outer container 20 and denting inward in the radial direction is provided. It 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 due to the liquid such as a beverage adhering to the vicinity of the opening of the double container 10 proceeds downward along the outer surface of the double container 10, but the groove 34 becomes an obstacle and the groove 34 The progress of the liquid (dripping) to the lower side is suppressed. By functioning the groove portion 34 as a dripping suppressing portion in this way, it is possible to prevent a wide range of the outer surface of the double container 10 from becoming wet.

Further, according to the above configuration, the position of the edge (upper end of the outer container 20) of the joint portion 40 on the outer peripheral surface near the opening of the container can be easily visually determined based on the difference in the state of the reflected light based on the concave shape of the groove portion 34. Can be grasped. That is, the groove portion 34 functions as an indicator portion indicating the position of the joint portion 40.

Thereby, when the processing relating to the joint portion 40 of the manufactured double container 10 (for example, quality evaluation for confirming the joint state of the joint portion 40) is performed, the position of the joint portion 40 can be easily specified. The process can be performed smoothly. If the upper end of the outer container 20 constituting the outside of the joint 40 has a shape in which the wall thickness gradually decreases toward the tip side, it becomes difficult to directly find the edge of the joint 40. Therefore, it is particularly effective to combine it with such a configuration.

(4) The maximum depth of the groove portion 34 is smaller than the wall thickness of the curved return portion 33 (hanging portion 33b).
According to the above configuration, since the groove portion 34 is formed to be shallow, even when the user's mouth is brought into contact with the outer peripheral surface near the opening of the container and the mouth touches the groove portion 34, a smooth mouthfeel is obtained.

[Second Embodiment]
Hereinafter, the metal double container of the second embodiment will be described. Here, the differences from the first embodiment will be mainly described. In the metal double container of the second embodiment, the configurations of the joint portion 40 and the groove portion 34 are different from those of the first embodiment.

As shown in FIG. 3, in the metal double container 10 of the second embodiment, the second reduced diameter portion 21c of the outer container 20 and the hanging portion 33b which is the tip end portion of the curved return portion 33 of the inner container 30 are formed. It includes a joined portion 40 that has been joined. More specifically, inside the outer container 20, the inner container 30 is arranged so that the inner surface of the tip end portion of the hanging portion 33b of the curved return portion 33 and the outer surface of the second reduced diameter portion 21c of the outer container 20 overlap. ing. The joint portion 40 is a portion where the overlapping portion between the inner surface of the tip portion of the hanging portion 33b and the outer surface of the second reduced diameter portion 21c is joined by welding.

The tip portion of the hanging 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 end side (lower end side). More specifically, the outer surface of the tip portion of the hanging portion 33b is formed in a curved surface shape that gradually approaches the inner surface of the hanging portion 33b toward the tip side. Then, at the tip of the hanging portion 33b, the outer surface of the tip portion of the hanging 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 portion of the hanging portion 33b. The wall thickness of the curved return portion 33 is, for example, 0.20 to 0.40 mm.

Further, a groove portion 24 recessed inward in the radial direction is provided in a portion of the second reduced diameter portion 21c below the joint portion 40 (a portion below the tip of the hanging portion 33b of the curved return portion 33). ing. The groove portion 24 is formed so as to be recessed in a circular arc shape in cross section from the portion where the tip of the hanging portion 33b is joined and to extend in the circumferential direction along the tip of the hanging 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 33b and the shape of the groove portion 24, some dimensions such as the wall thickness are partially increased to make the expression somewhat extreme. Is illustrated.

The double container 10 of the second embodiment also has the same effects as those of the above (1) to (4).
The above embodiment can be modified and implemented as follows. The above embodiment and the following modified examples can be implemented in combination with each other within a technically consistent range.

The shape of the upper end portion (second diameter-reduced 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 tip end side. For example, it may have a configuration having an inclined surface-shaped outer surface, or may have a configuration having a curved surface-shaped portion and an inclined surface-shaped portion on the outer surface. Further, in the above embodiment, the outer surface of the upper end portion of the outer container 20 is smoothly connected to the outer surface of the upper end portion of the outer container 20, but may be connected with a slight step. The tip of the curved return portion 33 (the tip of the hanging portion 33b) in the second embodiment may be changed in the same manner as in the first embodiment.

-The hanging portion 33b of the curved return portion 33 may be omitted. In this case, the curl portion 33a of the curved return portion 33 may be a joint portion 40 in which a portion on the tip end side pointing to the lower side and the outer container 20 are joined.

-The shape and groove depth of the grooves 24 and 34 may be changed. For example, the groove depths of the grooves 24 and 34 may be made larger than the wall thickness of the wall where the grooves are provided. When the groove depths of the grooves 24 and 34 are increased, the function of the grooves 24 and 34 as a dripping suppressing portion can be increased. Further, the groove portions 24 and 34 may be omitted.

-The use of the double container 10 of the above embodiment is not particularly limited, and can be applied to a known metal double container such as a heat insulating container for beverages and a heat insulating container for soup. Further, the overall shape of the double container 10 is not particularly limited, and the shape can be adjusted according to the intended use and the like.

Next, another technical idea that can be grasped from the above embodiment will be added below.
From the above embodiment, it is possible to derive a technical problem of facilitating the position of the joint portion 40 on the outer peripheral surface near the opening of the container and a technical idea of solving the technical problem by providing the grooves 24 and 34. can. From this point of view, in the first embodiment, the shape of the tip portion of the outer container 20 provided with the groove portion 34 is a shape other than the shape in which the wall thickness gradually decreases toward the tip side (for example, the shape). A configuration in which the wall thickness is constant) is also conceivable. Further, with respect to the second embodiment, it is also conceivable to consider a configuration in which the groove portion 24 is provided and the shape of the tip portion of the curved return portion 33 is a shape other than the shape in which the wall thickness gradually decreases toward the tip side. Be done. In these cases as well, the effect of facilitating the grasping of the position of the joint portion 40 on the outer peripheral surface near the opening of the container can be obtained.

(B) A metal double container in which a heat insulating layer is provided between a cylindrical inner container and an outer container that opens on the upper side, and is provided on the peripheral edge of the opening at the upper end of the inner container and is radially outer. The joint portion in the curved return portion is provided with a curved return portion that is curved toward and extends downward, 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. 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 a groove portion recessed inward in the radial direction is provided in a portion above the outer container.

(B) A metal double container in which a heat insulating layer is provided between a cylindrical inner container and an outer container that opens on the upper side, and is provided on the peripheral edge of the opening at the upper end of the inner container and is radially outside. The joint portion in the outer container is provided with a curved barb portion that is curved toward and extends downward, and a joint portion in which the inner surface of the tip end portion of the curved barb portion and the outer surface of the outer container are joined. A metal double container characterized in that a portion below the portion extends in the circumferential direction along the tip of the curved return portion and is provided with a groove portion recessed inward in the radial direction.

S ... Space (insulation layer), 10 ... Metal double container, 20 ... Outer container, 21 ... Outer wall, 21a ... Main body, 21b ... First diameter reduction part, 21c ... Second diameter reduction part, 22 ... Outer bottom wall, 23 ... Male threaded part, 24, 34 ... Groove part, 30 ... Inner container, 31 ... Inner peripheral wall, 32 ... Inner bottom wall, 33 ... Curved return part, 33a ... Curl part, 33b ... Hanging.

Claims (2)

A double metal container with a heat insulating layer between the cylindrical inner container and outer container that opens upward.
A curved return portion provided on the peripheral edge of the opening at the upper end of the inner container and extending downward while curving outward in the radial direction.
The joint portion where the overlapping portions arranged so that the outer surface of the curved return portion and the inner surface of the upper end portion of the outer container overlap is joined, or the inner surface of the tip end portion of the curved return portion and the outer surface of the outer container It is provided with a joint portion in which overlapping portions arranged so as to overlap are joined.
Of the upper end portion of the outer container and the tip end portion of the curved return portion, one of the outer portions of the joint portion has a shape in which the wall thickness gradually decreases toward the tip end side.
It is provided with 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.
A portion of the curved return portion above the joint portion is provided with a groove portion that extends in the circumferential direction along the tip of the upper end portion of the outer container and is recessed inward in the radial direction . Double metal container. A double metal container with a heat insulating layer between the cylindrical inner container and outer container that opens upward.
A curved return portion provided on the peripheral edge of the opening at the upper end of the inner container and extending downward while curving outward in the radial direction.
The joint portion where the overlapping portions arranged so that the outer surface of the curved return portion and the inner surface of the upper end portion of the outer container overlap is joined, or the inner surface of the tip end portion of the curved return portion and the outer surface of the outer container It is provided with a joint portion in which overlapping portions arranged so as to overlap are joined.
Of the upper end portion of the outer container and the tip end portion of the curved return portion, one of the outer portions of the joint portion has a shape in which the wall thickness gradually decreases toward the tip end side.
It is provided with a joint portion in which the inner surface of the tip end portion of the curved return portion and the outer surface of the outer container are joined.
A portion of the outer container below the joint portion is made of a metal characterized in that a groove portion extending in the circumferential direction along the tip of the curved return portion and a groove portion recessed inward in the radial direction is provided . Double container.

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