阅读说明：本技术 隔热容器以及带盖容器 (Heat-insulating container and container with lid ) 是由 丸山高广 藤谷茂 伊石翼 马场圭太 于 2020-04-03 设计创作，主要内容包括：本发明提供一种能够使外容器与内容器的接合端部精度良好地接合,而且能够得到加工良好的接合端部的隔热容器。隔热容器具有一端开口的金属制的外容器以及内容器,在将内容器收容于外容器的内侧的状态下使它们相互接合,并且在外容器与内容器之间设置有真空隔热层,该隔热容器具备：外侧接合端部,包含使外容器的开口端向上方延长的直线部；和内侧接合端部,包含从内容器的上端向外翻折,并且使内容器的开口端向下方折弯的弯曲部,在直线部的内表面与弯曲部的外表面对接的状态下,外侧接合端部的对接部与内侧接合端部的对接部被接合。(The invention provides a heat insulating container which can make the joint end of an outer container and an inner container joint with good precision and can obtain a joint end with good processing. The heat insulating container has an outer container and an inner container made of metal and having one open end, the outer container and the inner container are joined to each other in a state where the inner container is accommodated inside the outer container, and a vacuum heat insulating layer is provided between the outer container and the inner container, the heat insulating container comprising: an outer joining end portion including a linear portion extending the open end of the outer container upward; and an inner joint end portion including a curved portion that is folded outward from an upper end of the inner container and bends an open end of the inner container downward, wherein the abutting portion of the outer joint end portion and the abutting portion of the inner joint end portion are joined in a state where an inner surface of the linear portion abuts against an outer surface of the curved portion.)

1. A heat insulating container having an outer container and an inner container made of metal and having one end open, wherein the outer container and the inner container are joined to each other in a state where the inner container is housed inside the outer container, and a vacuum heat insulating layer is provided between the outer container and the inner container,

the thermally insulated container is characterized in that,

the disclosed device is provided with:

an outer joining end portion including a linear portion extending upward from an open end of the outer container; and

an inner joint end portion including a bent portion that is folded outward from an upper end of the inner container and bends an opening end of the inner container downward,

the abutment portion of the outer joining end portion and the abutment portion of the inner joining end portion are joined in a state where the inner surface of the straight portion abuts against the outer surface of the curved portion.

2. The insulated container of claim 1,

the inside joint end portion includes a flat portion that flattens a portion of an outer surface of the bent portion,

the abutting portion of the outer joining end portion and the abutting portion of the inner joining end portion are joined in a state where the inner surface of the linear portion abuts against the flat portion.

3. The insulated container of claim 1 or 2,

a tapered portion having a diameter gradually increasing toward the abutting portion is provided on an inner surface of the inner container.

4. A container with a lid, comprising:

the heat-insulating container according to claim 1 or 2; and

and a cover body detachably attached to the heat insulating container.

Technical Field

The present invention relates to a heat-insulating container and a container with a lid.

Background

For example, there is a heat insulating container including an outer container and an inner container made of metal and having one end opened, the open ends of the inner container are joined to each other in a state where the inner container is housed inside the outer container, and a vacuum heat insulating layer is provided between the outer container and the inner container. Such heat insulating containers are widely used in beverage containers such as kettles and mugs having heat and cold insulating functions, food containers having a heat insulating function, cooking machines, and the like.

However, in the above-described heat insulating container, the open ends of the outer container and the inner container are butted against each other, and the butted portions are joined by welding (for example, refer to patent documents 1 and 2 listed below).

Specifically, in the heat insulating container described in patent document 1, the upper end portions of the outer container and the inner container are joined to each other by welding (so-called butt welding) with the inner surface of the outer container and the outer surface of the inner container in a butt state.

On the other hand, in the heat insulating container described in patent document 2, the upper end portion of the inner container is bent outward, and the open ends of the outer container and the inner container are joined to each other by welding in a state where the open ends are butted against each other.

Patent document 1: japanese laid-open patent publication No. 11-227764

Patent document 2: japanese patent laid-open publication No. 2002-282137

However, in the heat insulating container described in patent document 1, since the upper end portion is thin, the taste is poor when the beverage is directly drunk through the mouth, and good drinking comfort cannot be obtained. On the other hand, in order to obtain a good-tasting drinking spout, when an inner plug member forming the drinking spout is attached to the upper end portion of the heat-insulating container, the number of members increases, which leads to an increase in manufacturing cost.

In addition, when a lid for closing the upper opening of the heat-insulating container is attached, a gasket is attached to the lid, and the flow of water between the heat-insulating container and the lid is cut off via the gasket abutting against the upper end of the heat-insulating container. However, when the gasket is brought into contact with the upper end portion of the heat insulating container, there is a possibility that the gasket is damaged, and there arises a problem of durability such as an increase in the frequency of replacing the gasket.

On the other hand, in the heat insulating container described in patent document 2, when the open end of the outer container and the open end of the inner container are butted against each other, the butted area therebetween is reduced, and thus the position is likely to be displaced. Further, if the abutting area between the two is reduced, the penetration amount by laser welding may be insufficient for joining. Therefore, although plasma welding with a large penetration amount is used, the welding bead is large, which complicates the manufacturing process and increases the manufacturing cost. Further, in order to increase the abutting area between the open end of the outer container and the open end of the inner container, the plate thickness of the outer container and the inner container must be increased, and it is difficult to reduce the plate thickness of the outer container and the inner container and to reduce the weight of the heat insulating container.

Disclosure of Invention

The present invention has been made in view of the above-described conventional circumstances, and an object thereof is to provide a heat-insulating container which can join the joint end portions of an outer container and an inner container with high accuracy and can obtain a well-processed joint end portion, and a lidded container provided with such a heat-insulating container.

In order to achieve the above object, the present invention provides the following means.

(1) The heat insulating container has an outer container and an inner container made of metal and having one open end, the outer container and the inner container are joined to each other in a state where the inner container is accommodated inside the outer container, and a vacuum heat insulating layer is provided between the outer container and the inner container,

the vacuum heat insulation layer includes:

an outer joining end portion including a linear portion extending upward from an open end of the outer container; and

an inner joint end portion including a bent portion which is folded outward from an upper end of the inner container and bends an opening end of the inner container downward,

the abutting portion of the outer joining end portion and the inner joining end portion is joined in a state where the inner surface of the linear portion abuts against the outer surface of the curved portion.

(2) The insulated container according to the above (1), wherein the inner joining end portion includes a flat portion that flattens a part of an outer surface of the curved portion, and the abutting portion of the outer joining end portion and the inner joining end portion is joined in a state where an inner surface of the linear portion abuts against the flat portion.

(3) The heat-insulating container according to the above (1) or (2), wherein a tapered portion whose diameter gradually increases toward the abutting portion is provided on an inner surface of the inner container.

(4) A container with a lid, comprising:

the heat-insulating container according to the above (1) or (2); and

and a cover body detachably attached to the heat insulating container.

As described above, according to the present invention, it is possible to provide a heat-insulating container in which a joining end portion of an outer container and an inner container can be joined with high accuracy and a joining end portion can be processed with high accuracy, and a container with a lid including the heat-insulating container.

Drawings

Fig. 1 is a perspective view showing an appearance of a container with a lid according to an embodiment of the present invention.

Fig. 2 is a sectional view showing the structure of the lidded container shown in fig. 1.

Fig. 3 is a sectional view showing the structure of the heat insulating container provided in the lidded container shown in fig. 1.

Fig. 4 is a cross-sectional view showing a part of the insulated container shown by a circled portion a in fig. 3 in an enlarged manner.

Description of the reference numerals

An insulated container; an outer container; the inner container; 4. vacuum thermal insulation layer; an outboard junction end; inner engagement end; a straight portion; a bend; a flat portion; a conical portion; a lidded container; a cover body; a water stop gasket.

Detailed Description

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

As one embodiment of the present invention, for example, a container 100 with a lid shown in fig. 1 to 4 will be described. Fig. 1 is a perspective view showing an external appearance of the container with a cap 100. Fig. 2 is a sectional view showing the structure of the lidded container 100. Fig. 3 is a sectional view showing the structure of the heat insulating container 1 provided in the lidded container 100. Fig. 4 is a cross-sectional view showing a part of the insulated container 1 shown by a circled portion a in fig. 3 in an enlarged manner.

As shown in fig. 1 and 2, the lidded container 100 of the present embodiment includes an insulated container 1 serving as a container main body and a lid 200 detachably attached to the insulated container 1. In the lidded container 100, the upper opening 1a of the heat-insulating container 1 can be opened and closed by a lid body 200 attached to the heat-insulating container 1 by screwing.

The lid body 200 is configured to be attached by screwing in a state of being fitted from the upper opening 1a of the heat insulating container 1 to the inside, but is not necessarily limited to such a configuration. For example, the lid body 200 may be attached to the outside of the heat-insulating container 1 by screwing while covering the upper opening 1a of the heat-insulating container 1. The lid body 200 is not limited to a structure for directly opening and closing the upper opening 1a of the heat-insulating container 1, and may be a structure for openably and closably attaching a lid body to a lid body attached to the heat-insulating container 1. The lid body is not limited to the structure attached to the lid body by screwing, and may be rotatably attached to the lid body via a hinge portion.

As shown in fig. 3, the heat insulating container 1 includes an outer container 2 and an inner container 3 made of metal, for example, stainless steel. The heat insulating container 1 has a vacuum heat insulating structure in which an inner container 3 having an open end 3a (hereinafter, referred to as an "open end") is joined to each other in a state where the inner container 3 having an open end 3a is housed inside an outer container 2 having an open end 2a (hereinafter, referred to as an "open end"), and a vacuum heat insulating layer 4 is provided between the outer container 2 and the inner container 3.

The vacuum heat insulating layer 4 can be formed by sealing a degassing hole provided in the center of the bottom surface of the outer container 2 with solder in a chamber depressurized to a high vacuum (evacuated), for example.

The heat insulating container 1 has such a vacuum heat insulating structure, and thus can have a function of keeping warm or keeping cool as a beverage container. Further, the heat insulating container 1 has such a vacuum heat insulating structure, and thereby the outer container 2 and the inner container 3 are always tensioned by a difference between an internal pressure (vacuum pressure) and an external pressure (atmospheric pressure), and the mechanical strength of the outer container 2 and the inner container 3 is increased. Thus, even when the thicknesses of the outer container 2 and the inner container 3 are reduced, the rigidity of the heat insulating container 1 can be increased, and the heat insulating container 1 can be made lighter.

The heat insulating container 1 includes a substantially circular bottom surface portion 1b, a body portion 1c that is substantially cylindrical and stands from the outer periphery of the bottom surface portion 1b, and a substantially cylindrical neck portion 1d that is reduced in diameter on the upper side of the body portion 1 c. The upper end of the neck portion 1d is opened in a circular shape as an upper opening 1a of the heat insulating container 1.

An internal thread portion 5 is provided on the inner peripheral surface of the neck portion 1 d. The female screw portion 5 is constituted by a thread ridge projecting in a spiral shape downward from the upper end side of the neck portion 1 d. An annular projecting portion 6 is provided below the internal thread portion 5 and projecting from the inner circumferential surface of the inner container 3 over the entire circumference 6.

The lid body 200 is provided with an external thread portion 201 that is screwed with the internal thread portion 5. The water-stop gasket 300 is detachably attached to the lid body 200, and when fitted to the inside of the upper opening 1a, the water-stop gasket 300 is closely attached to the projecting portion 6 over the entire circumference while being elastically deformed.

The heat insulating container 1 of the present embodiment has a substantially cylindrical outer shape as a whole, but the outer shape of the heat insulating container 1 is not particularly limited, and can be appropriately changed in accordance with the size, the design, and the like. Further, the outer surface of the outer container 2 may be coated or printed.

However, as shown in fig. 4, the heat insulating container 1 of the present embodiment includes an outer joining end portion 11 and an inner joining end portion 12 joined to each other at a butt joint portion (hereinafter, referred to as a "butt joint portion") 2b and 3b of the outer container 2 and the inner container 3.

The outer joining end portion 11 includes a linear portion 13 extending upward from the open end 2a of the outer container 2. In the cross-sectional view, the linear portion 13 is formed linearly in the vertical direction along the outer surface of the neck-finish portion 1 d. In addition, the open end 2a of the outer container 2 coincides with the butting portion 2b in the outside joint end portion 11.

The inner joint end portion 12 includes a curved portion 14 that is folded outward from the upper end of the inner container 3 and bends the open end 3a of the inner container 3 downward, and a flat portion 15 that flattens a part of the outer surface of the curved portion 14.

The bent portion 14 is bent such that the open end 3a of the inner container 3 is located between the inner surface of the outside joint end portion 11 (outer container 2) and the outer surface of the inside joint end portion 12 (inner container 3).

In the inner joint end 12, if the open end 3a of the inner container 3 is in contact with the inner surface of the outer joint end 11 (outer container 2), the inner container 3 cannot be fitted into the outer container 2 when the inner container 3 is fitted into the outer container 2, or the shape of the inner joint end 12 is changed, which is not preferable. On the other hand, if the open end 3a of the inner container 3 is in contact with the outer surface of the inner joint end 12 (inner container 3), the shape of the curved portion 14 changes when the flat portion 15 is formed, and hence satisfactory roundness cannot be obtained, which is not preferable.

The flat portion 15 is flattened so that a part of the bent portion 14 is parallel to the linear portion 13. By providing such a flat portion 15 in the inner joint end portion 12, the contact area between the inner surface of the linear portion 13 and the outer surface of the curved portion 14 can be increased.

In the heat-insulated container 1 of the present embodiment, the abutting portion 2b of the outer joining end portion 11 and the abutting portion 3b of the inner joining end portion 12 are joined in a state where the inner surface of the linear portion 13 abuts against the flat portion 15 and the outer surface of the curved portion 14. A welding method such as laser welding is used for joining the outer joining end portion 11 and the inner joining end portion 12.

In the heat insulating container 1 of the present embodiment, the upper opening 1a is formed by the upper end 3c of the inner container 3. The upper end portion 3c of the inner container 3 is formed by a part of the above-described bent portion 14. In the present embodiment, the upper end portion 3c of the inner container 3 is positioned above the mating portion 3b, but the upper end portion 3c of the inner container 3 may be configured to coincide with the mating portion 3 b.

In fig. 4, the butted portion (boundary) between the outer joint end portion 11 and the inner joint end portion 12 is shown, but after joining, the butted portion is melted by welding, and thereby a welding bead is formed over the entire circumference at the butted portion 2b of the outer joint end portion 11 and the butted portion 3b of the inner joint end portion 12. After the welding process, the weld bead is ground and polished to form a smooth surface.

Further, a tapered portion 16 having a diameter gradually increasing toward the abutting portion 3b is provided on the inner surface of the inner container 3. In a cross-sectional view, the tapered portion 16 is provided along the inner surface of the neck-mouth portion 1d from above the female screw portion 5, and is inclined from the upper end of a straight portion 17 formed linearly in the vertical direction toward the butting portion 3 b. Thus, in the heat-insulating container 1, good taste can be provided and good drinking comfort can be obtained in the case where a beverage is drunk directly by mouth through the neck portion 1 d.

As described above, in the heat insulating container 1 of the present embodiment, the outer joint end portion 11 and the inner joint end portion 12 can be joined with high accuracy, and a joint end portion with good processing can be obtained. Therefore, in the heat insulating container 1, smooth flow of the beverage can be realized and good drinking comfort can be obtained, for example, when the beverage is directly drunk by mouth through the neck portion 1 d.

In addition, in the heat insulating container 1 of the present embodiment, it is possible to prevent the weld bead from becoming large, and to simplify the manufacturing process and reduce the manufacturing cost. Further, the thicknesses of the outer container 2 and the inner container 3 are reduced, so that the heat insulating container 1 can be made lighter and the heat insulating performance can be improved.

The present invention is not necessarily limited to the above embodiments, and various modifications can be made without departing from the scope of the present invention.

For example, the present invention is not necessarily limited to a container with a lid in which a lid is attached to an insulating container, and the present invention can be widely applied to an insulating container without a lid, such as a cup or a glass.