Heat insulation container and container with cap

Abstract

To provide a heat insulation container in which a joint end portion of a bottom member and a torso member constituting an outer container can be accurately joined, and a preferably finished joint end portion can be obtained.SOLUTION: A heat insulation container 1A is provided with a vacuum heat insulation layer 6 between an outer container 4 and an inner container. The outer container 4 includes a bottomed cylindrical bottom member 41 forming a bottom part 4a side of the outer container 4, and a cylindrical torso member 42 forming a torso part 4b side of the outer container 4. The outer container 4 further includes: an inside joint end part 40a including an inclination part 41d obtained by bending an opening end 41b of the bottom member 41 toward the inside while folding upward a periphery of the bottom part 4a of the bottom member 41; and an outside joint end part 40b including a lower side opening end 42b obtained by extending a lower side of the torso member 42 in a vertical direction. In a state where an outer surface of the inclination part 41d and an inner surface of the lower side opening end 42b face each other, contact parts 41a, 42a of the inside joint end part 40a and the outside joint end part 40b are joined.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to an insulated container and a container with a cap. [Background technology]

[0002] For example, there is an insulated container that has a metallic outer container and an inner container, each open at one end, with the inner container housed inside the outer container and the open ends of the two joined together, and a vacuum insulation layer provided between the outer and inner containers. Such insulated containers are widely used for beverage containers such as water bottles and mugs with heat / cold insulation functions, food containers and cooking utensils with heat insulation functions, etc.

[0003] In the above-mentioned insulated container, the joint ends of the bottom member, which is a cylindrical bottom member with a bottom, that forms the bottom side of the outer container, and the joint end of the cylindrical body member that forms the body side of the outer container are opposed to each other, and these joint ends are joined by welding (see, for example, Patent Documents 1 and 2 below).

[0004] In the invention described in Patent Document 1 below, a resin bottom cover is attached to cover the joint between the bottom member and the body member that make up the outer container, i.e., the bottom side. However, attaching such a bottom cover not only increases the number of parts but also leads to an increase in weight.

[0005] On the other hand, in the invention described in Patent Document 2 below, a raised peripheral portion of the bottom member and a body portion that constitute an outer container are provided at opposing positions on the end side of the body portion, the end of the body portion is engaged with a stepped portion of the raised peripheral portion, and the stepped portion of the bottom member and the end of the body portion are welded. However, with this structure, since a dimensional difference is provided in advance between the raised peripheral portion of the bottom member and the body portion, it is difficult to control the dimensions, and a step is created on the side surface of the outer container after welding, which detracts from the aesthetic appearance. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Publication No. 10-14786 [Patent Document 2] Japanese Patent Application Laid-Open No. 2011-206408 Summary of the Invention [Problem to be solved by the invention]

[0007] The present invention has been proposed in light of the above-mentioned conventional circumstances, and aims to provide an insulated container in which a vacuum insulation layer is provided between an outer container and an inner container, in which the joint ends of the bottom member and body member that make up the outer container can be joined with high precision and a well-finished joint can be obtained, as well as a lidded container equipped with such an insulated container. [Means for solving the problem]

[0008] In order to achieve the above object, the present invention provides the following means. [1] An insulated container having a metallic outer container and an inner container, each of which has an open end, and in which the open ends of the two are joined together with the inner container housed inside the outer container, and a vacuum insulation layer is provided between the outer container and the inner container, The outer container includes a bottom member having a cylindrical shape with a bottom that forms a bottom side of the outer container, and a cylindrical body member that forms a body side of the outer container, and The bottom member has an inner joint end including an inclined portion formed by folding the open end of the bottom member inward while folding it back upward from the periphery of the bottom portion of the bottom member, and an outer joint end including a lower open end of the body member, An insulated container characterized in that the abutment portions of the inner joint end and the outer joint end are joined with the outer surface of the inclined portion facing the inner surface of the lower opening end. [2] The insulated container according to [1], characterized in that the abutment portion of the inner joint end portion is located at a corner portion where the bottom portion of the bottom member is bent or at the inclined portion. [3] The insulated container according to [1], wherein the lower open end extends vertically downward. [4] The insulated container according to [1], characterized in that the opening end of the bottom member is bent so as to be positioned between the inner surface of the bottom portion and the lower opening end of the body member. [5] The insulated container according to [1], wherein the body member has a tapered portion whose diameter gradually decreases upward. [6] The insulated container according to [1], wherein the bottom member has a concentric uneven structure on the bottom thereof. [7] The heat-insulating container according to any one of [1] to [6] above, a cap unit attached to the insulated container. [Effects of the Invention]

[0009] As described above, according to the present invention, an insulated container having a vacuum insulation layer between an outer container and an inner container is provided, in which the joint ends of the bottom member and body member constituting the outer container can be joined with high precision, and a well-finished joint can be obtained, as well as a lidded container equipped with such an insulated container. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a side view showing the appearance of a heat-insulating container according to a first embodiment of the present invention. [Figure 2] FIG. 2 is a cross-sectional view showing the configuration of the heat-insulating container shown in FIG. [Figure 3] 3 is an enlarged cross-sectional view of the heat-insulating container of the enclosed area A shown in FIG. 2. FIG. [Figure 4] FIG. 10 is a perspective view showing the appearance of a capped container according to a second embodiment of the present invention. [Figure 5] FIG. 5 is a cross-sectional view showing the configuration of the capped container shown in FIG. [Figure 6] 6 is an enlarged cross-sectional view of the heat-insulating container of the enclosed area B shown in FIG. 5. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. (First embodiment) First, as a first embodiment of the present invention, a thermally insulated container 1A shown in, for example, Figures 1 to 3 will be described. Figure 1 is a side view showing the appearance of the thermally insulated container 1A. Figure 2 is a cross-sectional view showing the configuration of the thermally insulated container 1A. Figure 3 is a cross-sectional view of the thermally insulated container 1A, enlarging the enclosed area A shown in Figure 2.

[0012] As shown in Figures 1 to 3, the insulated container 1A of this embodiment comprises a container body 2 having a vacuum insulation structure and a handle member 3 attached to the side of the container body 2, and is an application of the present invention to a mug that can keep a beverage (liquid) contained in the container body 2 hot or cold.

[0013] The container body 2 has a cylindrical outer container 4 and an inner container 5 with a bottom made of, for example, stainless steel, and is configured as a double-structure container in which the open ends of the outer container 4 and the inner container 5 are joined together with the inner container 5 housed inside the outer container 4. A vacuum insulation layer 6 is provided between the outer container 4 and the inner container 5. The vacuum insulation layer 6 can be formed, for example, by blocking a vent hole provided in the bottom 4a of the outer container 4 in a chamber that has been reduced to a high vacuum (evacuated).

[0014] The handle member 3 is a part that is gripped by the user, and extends in the vertical direction with both ends bent in the same direction. Both ends of the handle member 3 are attached to the side surfaces of the outer container 4 by screws or the like.

[0015] In this embodiment, the container body 2 is made up of an outer container 4 and an inner container 5, each of which is formed as a cylindrical container with a bottom, and the outer container 4 has a tapered shape in which the diameter gradually decreases toward the top. The shape of the insulated container 1A is not particularly limited, and the shapes of the container body 2 and the handle member 3 can be appropriately changed to suit the size, design, etc. The outer surface of the outer container 4 may be painted, printed, etc.

[0016] In the heat-insulating container 1A of this embodiment, the outer container 4 is composed of a bottomed cylindrical bottom member 41 that forms the bottom 4a side of the outer container 4, and a cylindrical body member 42 that forms the body 4b side of the outer container 4.

[0017] In the insulated container 1A of this embodiment, the inner container 5 is housed inside the body member 42, and with their open ends facing each other, the abutting portions are joined by welding. Then, the bottom member 41 and the body member 42 are fitted together, and the abutting portions are joined by welding to form the outer container 4 and the container body 2.

[0018] In addition to the stainless steel mentioned above, metals such as titanium, aluminum, magnesium, or alloys thereof can be used for the outer container 4 (bottom member 41 and body member 42) and the inner container 5. For joining by welding, a welding method such as laser welding is used.

[0019] 2 shows the joints (boundaries) between the inner container 5 and the body member 42 and the joints (boundaries) between the bottom member 41 and the body member 42, but after joining, these joints will be melted by welding to form weld beads around the entire periphery of the joints. After welding, these weld beads will be ground and polished to a smooth surface.

[0020] In the insulated container 1A of this embodiment, the outer container 4 has an inner joint end 40a and an outer joint end 40b that are joined to each other at the abutting portions 41a, 42a of the bottom member 41 and the body member 42, as shown in FIG.

[0021] Specifically, the inner joint end 40a includes a curved portion 41c formed by bending the open end 41b of the bottom member 41 inward while folding back upward from the periphery of the bottom portion 4a of the bottom member 41, and an inclined portion 41d formed by flattening a portion of the outer surface of the curved portion 41c. On the other hand, the outer joint end 40b includes a lower open end 42b extending vertically from the lower side of the body member 42.

[0022] The curved portion 41c is bent so that the opening end 41b of the bottom member 41 is positioned between the inner surface of the bottom portion 4a and the inner surface of the lower opening end 42b. This makes it easier to fit the bottom member 41 inside the body member 42.

[0023] The inclined portion 41d is formed by flattening a portion of the curved portion 41c while tilting it inward. By providing such an inclined portion 41d at the inner joint end 40a, it becomes easier to align the inner joint end 40a of the bottom member 41 with the outer joint end 40b of the body member 42 before welding.

[0024] In this embodiment, the curved portion 41c and the inclined portion 41d are provided, but it is sufficient if the opening end 41b is bent inward to facilitate fitting of the bottom member 41 and the body member 42. Therefore, it is also possible to provide only the inclined portion 41d and omit the curved portion 41c.

[0025] The lower opening end 42b is located below the body member 42 and is formed linearly in the vertical direction in a cross-sectional view. The body member 42 also has a tapered portion 42c whose diameter gradually decreases upward from the lower opening end 42b.

[0026] The contact portion 41a of the inner joint end portion 40a is located at the corner 41e between the bottom portion 4a of the bottom member 41 and the inclined portion 41d, or at the inclined portion 41d. On the other hand, the contact portion 42a of the outer joint end portion 40b is located at the lower opening end 42b of the body member 42.

[0027] Therefore, the bottom member 41 and the body member 42 can be joined by aligning the radial positions of the abutting portions 41a and 42a, making it easy to adjust the diameter. For example, if the outer diameter of the bottom member 41 becomes larger than the outer diameter of the body member 42 during the manufacturing process, the outer diameter can be reduced by adjusting the position of the corner of the inclined portion 41d of the bottom member 41. The abutting portion 41a of the inner joining end portion 40a may be provided on the inclined portion 41d or on the corner 41e.

[0028] A concentric uneven structure is provided on the bottom 4a of the bottom member 41. In this embodiment, a recess 41f is provided by recessing a portion of the bottom 4a of the bottom member 41 in the shape of a circular ring toward the top. In the insulated container 1A of this embodiment, by providing the bottom 4a of the bottom member 41 with an uneven structure including such a recess 41f, it is possible to increase the strength of the bottom 4a of the bottom member 41 by work hardening.

[0029] The uneven structure is not limited to the above-described structure having recesses, but may be a structure in which a part of the bottom 4a of the bottom member 41 is provided with a convex portion that protrudes downward in the shape of a circular ring.

[0030] In the insulated container 1A of this embodiment, the inner joint end 40a and the outer joint end 40b are joined at their abutting portions 41a, 42a with the outer surface of the inclined portion 41d facing the inner surface of the lower open end 42b. The inner joint end 40a and the outer joint end 40b are joined by a welding method such as laser welding.

[0031] The contact portions 41a and 42a may be joined to the corner portion 41e and the inner surface of the lower opening end 42b, or to the inclined portion 41d and the tip end of the lower opening end 42b.

[0032] 3 shows the joint (boundary) between the inner joint end 40a and the outer joint end 40b, but after joining, this joint is melted by welding, and a weld bead is formed around the entire periphery of the abutting parts 41a, 42a of the inner joint end 40a and the outer joint end 40b. After welding, this weld bead is ground and polished to a smooth surface.

[0033] In the insulated container 1A of this embodiment, the lower opening end 42b has a straight shape extending vertically to make it easier to align the abutment portions 41a, 42a, but it is not limited to this shape and may also be tapered or rounded.

[0034] As described above, in the insulated container 1A of this embodiment, the inner joint end 40a of the bottom member 41 and the outer joint end 40b of the body member 42 that constitute the outer container 4 described above can be joined with high precision, and a well-finished joint can be obtained.

[0035] In particular, in the insulated container 1A of this embodiment, the joint between the bottom member 41 and the body member 42 that constitute the outer container 4 is located at the outermost periphery (peripheral edge) on the underside of the bottom 4a, so there is no step at the joint and there is no need to attach a bottom cover to cover the joint.

[0036] Furthermore, the insulated container 1A of this embodiment can prevent the weld bead from becoming large, while simplifying the manufacturing process and reducing manufacturing costs. Furthermore, by reducing the plate thickness of the outer container 4 and the inner container 5, it is possible to reduce the weight of the insulated container 1A and improve its insulating performance.

[0037] In particular, in the insulated container 1A of this embodiment, the outer container 4 is constructed from separate members, the bottom member 41 and the body member 42, which makes it possible to make the thickness of the bottom member 41, which requires strength, thicker than the thickness of the body member 42, or to make the outer container 4 described above tapered.

[0038] Furthermore, in the insulated container 1A of this embodiment, the body member 42 has an approximately tapered shape, but by adjusting the joining angle of the abutment portions 41a, 42a, the outer container 4 may have an approximately cylindrical shape or an inverted tapered shape with a diameter that gradually decreases downward.

[0039] (Second embodiment) Next, as a second embodiment of the present invention, a capped container 100 including a heat-insulating container 1B shown in, for example, FIGS. 4 to 6 will be described.

[0040] Fig. 4 is a perspective view showing the appearance of the capped container 100. Fig. 5 is a cross-sectional view showing the configuration of the capped container 100. Fig. 6 is a cross-sectional view of the insulated container 1B, enlarging the boxed area B shown in Fig. 5. In the following explanation, the same parts as those in the insulated container 1A will not be described and will be denoted by the same reference numerals in the drawings.

[0041] As shown in Figures 4 to 6, the capped container 100 of this embodiment comprises a container body 101 constructed from the insulated container 1B of this embodiment and a cap unit 102 attached to the container body 101, and is an application of the present invention to a tabletop pot (beverage container) that can keep a beverage (liquid) contained in the container body 101 hot or cold using the container body 101 having a vacuum insulation structure.

[0042] In addition, in the capped container 100 of this embodiment, the side on which the spout 11 described below is provided will be treated as the "front side," and the side on which the handle portion 12 located opposite the spout 11 is provided will be treated as the "rear side."

[0043] Similar to the container body 2, the container body 101 has a cylindrical outer container 4 and an inner container 5 with a bottom made of, for example, stainless steel, and is configured as a double-structure container in which the open ends of the outer container 4 and the inner container 5 are joined together with the inner container 5 housed inside the outer container 4. A vacuum insulation layer 6 is provided between the outer container 4 and the inner container 5. The vacuum insulation layer 6 can be formed, for example, by blocking a vent hole provided in the bottom 4a of the outer container 4 in a chamber that has been depressurized (evacuated) to a high vacuum.

[0044] In this embodiment, the insulated container 1B constituting the container body 101 is composed of an outer container 4 and an inner container 5 formed in a cylindrical shape with a bottom, and the outer container 4 has a tapered shape in which the diameter gradually decreases toward the top.

[0045] The outer container 4 constituting the container body 101 has a substantially circular bottom 4a, a body 4b that stands up in a substantially cylindrical shape from the outer periphery of the bottom 4a, a substantially cylindrical mouth / neck 4c that is tapered in diameter at the upper side of the body 4b, and a shoulder 4d that gradually tapers in diameter from the body 4b toward the mouth / neck 4c. The upper end of the mouth / neck 4c opens in a circular shape as an upper opening 101a of the container body 101.

[0046] On the other hand, the inner container 5 constituting the container body 101 has a shape in which the inner circumferential side of the mouth / neck part 4c is smaller in diameter than the inner circumferential side of the body part 4b. The inner container 5 also has a protruding part 7 that protrudes all around the inner circumferential side of the mouth / neck part 4c.

[0047] The shape of the container body 101 is not particularly limited, and the shape of the insulated container 1B can be appropriately changed to suit the size, design, etc. The outer surface of the outer container 4 may be painted, printed, or the like.

[0048] In the heat-insulating container 1B of this embodiment, the outer container 4 is composed of a cylindrical bottom member 41 with a bottom that forms the bottom 4a side of the outer container 4, and a cylindrical body member 42 that forms the body 4b side of the outer container 4.

[0049] In the insulated container 1B of this embodiment, the inner container 5 is housed inside the body member 42, and with their open ends facing each other, the abutting portions are joined by welding. Then, the bottom member 41 and the body member 42 are fitted together, and the abutting portions are joined by welding to form the outer container 4 and the container body 101.

[0050] 4 shows the joints (boundaries) between the inner container 5 and the body member 42 and the joints (boundaries) between the bottom member 41 and the body member 42, but after joining, these joints will be melted by welding to form a weld bead around the entire periphery of the joint. After welding, this weld bead will be ground and polished to a smooth surface.

[0051] The cap unit 102 includes a cap body 8 attached to the mouth / neck portion 4c of the container body 101, and a lid body 9 fitted inside the cap body 8 through a liquid passage port 8a provided in the cap body 8.

[0052] The cap body 8 is a shoulder member made of, for example, heat-resistant resin, and is attached to the mouth neck portion 4c of the container body 101 via a mouth gasket 10A and a shoulder gasket 10B, while forming a circular liquid passage port 8a that communicates with the inside of the container body 2.

[0053] The cap body 8 has a spout 11 for pouring the beverage in the container body 101 to the outside, and a handle 12 for the user to grip.

[0054] Spout 11 is located on the front side of cap body 8 and projects in the radially expanding direction from one end of the upper part of liquid passage port 8a. Handle 12 projects rearward from the side opposite spout 11, i.e., the rear side of cap body 8, and extends downward.

[0055] The lid 9 is a plug having a heat insulating structure, and is detachably attached to the cap body 8 so as to be able to open and close the liquid passage port 8a.

[0056] Specifically, the lid body 9 has an upper lid 13 and an inner stopper 14 made of, for example, a heat-resistant resin, and when the inner stopper 14 is fitted into the inside of the cap body 8 through the liquid passage 8a, the lid body 9 can block the liquid passage 8a.

[0057] The lid 9 has a liquid passage groove 15 which, together with the spout 11, forms a flow path R for allowing the beverage in the container body 2 to flow out, and an air vent groove 16 which introduces external air into the container body 2.

[0058] In the cap unit 102, when the inside plug 14 is fitted into the inside of the cap body 8 through the liquid passage port 8a, a flow path R is formed between the spout 11 and the liquid passage groove 15 which face each other.

[0059] In the insulated container 1B of this embodiment, the outer container 4 has an inner joint end 40a and an outer joint end 40b that are joined to each other at the abutment portions 41a, 42a of the bottom member 41 and the body member 42, as shown in FIG.

[0060] Specifically, the inner joint end 40a includes a curved portion 41c formed by bending the open end 41b of the bottom member 41 inward while folding back upward from the periphery of the bottom portion 4a of the bottom member 41, and an inclined portion 41d formed by flattening a portion of the outer surface of the curved portion 41c. On the other hand, the outer joint end 40b includes a lower open end 42b extending vertically from the lower side of the body member 42. The body member 42 also has a tapered portion 42c whose diameter gradually decreases upward from the lower open end 42b.

[0061] The abutting portion 41a of the inner joint end portion 40a is located at the corner 41e between the bottom portion 4a of the bottom member 41 and the inclined portion 41d, or at the inclined portion 41d. On the other hand, the abutting portion 42a of the outer joint end portion 40b is located at the lower opening end 42b of the body member 42.

[0062] Therefore, the bottom member 41 and the body member 42 can be joined by aligning the radial positions of the abutting portions 41a and 42a, making it easy to adjust the diameter. For example, if the outer diameter of the bottom member 41 becomes larger than the outer diameter of the body member 42 during the manufacturing process, the outer diameter can be reduced by adjusting the position of the corner of the inclined portion 41d of the bottom member 41. The abutting portion 41a of the inner joining end portion 40a may be provided on the inclined portion 41d or on the corner 41e.

[0063] The bottom 4a of the bottom member 41 is provided with a concentric uneven structure. In this embodiment, two convex portions 41g are provided side by side in a concentric circle, each of which is a circular ring-shaped protrusion that protrudes downward from a portion of the bottom 4a. In the insulated container 1B of this embodiment, by providing the bottom 4a of the bottom member 41 with an uneven structure including such convex portions 41g, it is possible to increase the strength of the bottom 4a of the bottom member 41 by work hardening.

[0064] In the insulated container 1B of this embodiment, the abutting portions 41a, 42a of the inner joint end portion 40a and the outer joint end portion 40b are joined together with the outer surface of the inclined portion 41d facing the inner surface of the lower opening end 42b.

[0065] The contact portions 41a and 42a may be joined to the corner portion 41e and the inner surface of the lower opening end 42b, or to the inclined portion 41d and the tip end of the lower opening end 42b.

[0066] 6 shows the joint (boundary) between the inner joint end 40a and the outer joint end 40b, but after joining, this joint is melted by welding, and a weld bead is formed around the entire periphery of the abutting parts 41a, 42a of the inner joint end 40a and the outer joint end 40b. After welding, this weld bead is ground and polished to a smooth surface.

[0067] In the insulated container 1A of this embodiment, the lower opening end 42b has a straight shape extending vertically to make it easier to align the abutment portions 41a, 42a, but it is not limited to this shape and may also be tapered or rounded.

[0068] As described above, in the insulated container 1B of this embodiment, the inner joining end 40a of the bottom member 41 and the outer joining end 40b of the body member 42 that constitute the outer container 4 described above can be joined with high precision, and it is also possible to obtain joined ends with a good finish.

[0069] In particular, in the insulated container 1B of this embodiment, the joint end between the bottom member 41 and the body member 42 that constitute the outer container 4 is located at the outermost periphery (peripheral edge) on the underside of the bottom 4a, so there is no step at the joint and there is no need to attach a bottom cover to cover the joint.

[0070] In addition, the insulated container 1B of this embodiment can prevent the weld bead from becoming large, while simplifying the manufacturing process and reducing manufacturing costs. Furthermore, by reducing the plate thickness of the outer container 4 and the inner container 5, it is possible to reduce the weight of the insulated container 1B and improve its insulating performance.

[0071] In particular, in the insulated container 1B of this embodiment, the outer container 4 is constructed from separate members, the bottom member 41 and the body member 42, which makes it possible to make the thickness of the bottom member 41, which requires strength, thicker than the thickness of the body member 42, or to make the outer container 4 described above tapered.

[0072] Furthermore, in the insulated container 1A of this embodiment, the body member 42 has an approximately tapered shape, but by adjusting the joining angle of the abutment portions 41a, 42a, the outer container 4 may have an approximately cylindrical shape or an inverted tapered shape with a diameter that gradually decreases downward.

[0073] The present invention is not necessarily limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention. For example, in the first embodiment, the insulated container 1A is applied to the above-mentioned mug, but the present invention can be widely applied to insulated containers such as teacups and tumblers.

[0074] On the other hand, the above second embodiment illustrates a capped container 100 applied to the above-mentioned tabletop pot, but the present invention can be widely applied to capped containers equipped with a cap unit that can be attached to a container body with an open top. [Explanation of symbols]

[0075] DESCRIPTION OF SYMBOLS 1A, 1B...Insulated container 2...Container body 3...Handle member 4...Outer container 5...Inner container 6...Vacuum insulation layer 40a...Inner joint end 40b...Outer joint end 41...Bottom member 41a...Abutment portion 41b...Opening end 41c...Curved portion 41d...Inclined portion 42...Body member 42a...Abutment portion 42b...Lower opening end 42c...Tapered portion 100...Container with cap 101...Container body 102...Cap unit

Claims

1. An insulated container having an outer container and an inner container made of metal, each having an open end, the open ends of which are joined together with the inner container housed inside the outer container, and a vacuum insulation layer provided between the outer container and the inner container, The outer container includes a bottom member having a cylindrical shape with a bottom that forms a bottom side of the outer container, and a cylindrical body member that forms a body side of the outer container, and The bottom member has an inner joint end including an inclined portion formed by folding the open end of the bottom member inward while folding it back upward from the periphery of the bottom portion of the bottom member, and an outer joint end including a lower open end of the body member, An insulated container characterized in that the abutment portions of the inner joint end and the outer joint end are joined with the outer surface of the inclined portion facing the inner surface of the lower opening end.

2. 2. The insulated container according to claim 1, wherein the abutting portion of the inner joint end portion is located at a corner formed by bending the bottom portion of the bottom member or at the inclined portion.

3. 2. The insulated container according to claim 1, wherein the lower open end extends vertically downward.

4. 2. The insulated container according to claim 1, wherein the open end of the bottom member is bent so as to be positioned between the inner surface of the bottom portion and the lower open end of the body member.

5. 2. The insulated container according to claim 1, wherein the body member has a tapered portion whose diameter gradually decreases upward.

6. 2. The insulated container according to claim 1, wherein the bottom member has a concentric uneven structure on the bottom thereof.

7. The heat-insulating container according to any one of claims 1 to 6, a cap unit attached to the insulated container.

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