Heat insulating container

Abstract

To provide a structure that can secure the strength of a neck part while restraining the conduction of heat in the neck part in a heat insulating container for housing food and drink.SOLUTION: A container body has: a packing receiving part 43 with which a packing of a lid body is in contact; and a cylindrical neck part 44 located on the upper side of the packing receiving part 43. The neck part 44 includes a thin part 441, and a thick part 442 whose thickness is larger than that of the thin part 441. Therefore, the conduction of heat in the neck part 44 can be restrained by the thin part 441. In addition, the strength of the neck part 44 can be secured by the thick part 442.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a thermal container for storing food and drink. [Background technology]

[0002] Conventionally, thermal containers for storing food and beverages, such as stainless steel bottles and soup jars, have been known. The thermal container has a cylindrical container body with a bottom and a lid that closes the opening at the top of the container body. The container body has a double structure consisting of an inner bottle and an outer bottle. This makes it possible to keep the food and beverages inside the container body warm.

[0003] A conventional thermal container is described in Patent Document 1, for example. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-006598 Summary of the Invention [Problem to be solved by the invention]

[0005] This type of thermal container has a cylindrical neck around the opening at the top of the container body. Some of the heat inside the container body is conducted to the neck and released to the outside from the neck. This gradually lowers the temperature of the food or drink contained in the container body. To further improve the food warming effect, a structure that can suppress heat conduction at the neck is required.

[0006] In this regard, Patent Document 1 describes a structure in which the neck is thinned to suppress heat conduction at the neck. However, simply thinning the neck reduces the strength of the neck, making it more susceptible to deformation due to external forces or the load of the inner bottle.

[0007] The present invention has been developed in consideration of the above circumstances, and aims to provide a structure for an insulated container for storing food and beverages that can suppress heat conduction at the neck while ensuring the strength of the neck. [Means for solving the problem]

[0008] The present invention is an insulated container for storing food and beverages, comprising a cylindrical container body with a bottom and a lid body that closes the opening at the top of the container body, the container body having a gasket receiving portion with which the gasket of the lid body comes into contact, and a cylindrical neck portion located above the gasket receiving portion, the neck portion including a thin-walled portion and a thick-walled portion that is thicker than the thin-walled portion.

[0009] According to the present invention, the thin-walled portion can suppress heat conduction in the neck portion, while the thick-walled portion can ensure the strength of the neck portion.

[0010] In particular, it is desirable that the thick-walled portion be arranged along the circumferential direction, which can further suppress the upward conduction of heat in the neck portion.

[0011] The container body preferably has an inner bottle for containing food and beverage and an outer bottle for covering the outside of the inner bottle, a vacuum layer between the inner bottle and the outer bottle, the inner bottle having the neck, and the thick-walled portion protruding from the neck toward the vacuum layer. This prevents a decrease in the strength of the neck without creating irregularities on the surface of the container body.

[0012] The container body may also have an inner bottle that contains food or beverage and an outer bottle that covers the outside of the inner bottle, a vacuum layer between the inner bottle and the outer bottle, the inner bottle having the neck, and the thick portion protruding inward from the neck.

[0013] It is also desirable that the annular thin portion and the annular thick portion are aligned vertically. This arrangement can suppress upward heat conduction in the neck portion more than when the thin portion is interrupted in the circumferential direction. Furthermore, the strength of the neck portion can be improved all around compared to when the thick portion is interrupted in the circumferential direction.

[0014] Furthermore, it is desirable that the thickness of the thin-walled portion be smaller than the thickness of the packing receiving portion, thereby making it possible to prevent heat conducted from the packing receiving portion to the neck portion from being conducted upward in the neck portion.

[0015] Furthermore, it is desirable that the average thickness of the neck portion be smaller than the thickness of the packing receiving portion, thereby further suppressing the heat conducted from the packing receiving portion to the neck portion from being conducted upward in the neck portion.

[0016] Furthermore, it is desirable that the thickness of the thick portion be smaller than the thickness of the packing receiving portion, thereby further suppressing the heat conducted from the packing receiving portion to the neck portion from being conducted upward in the neck portion. [Effects of the Invention]

[0017] According to the present invention, the thin-walled portion can suppress heat conduction in the neck portion, while the thick-walled portion can ensure the strength of the neck portion. [Brief explanation of the drawings]

[0018] [Figure 1] FIG. [Figure 2] FIG. [Figure 3] FIG. 2 is a vertical cross-sectional view of the insulated container near the lid body. [Figure 4] FIG. [Figure 5] FIG. 2 is a partial vertical cross-sectional view of the inner bottle. [Figure 6] FIG. 10 is a partial side view of an inner bottle according to a modified example. [Figure 7]FIG. 10 is a partial side view of an inner bottle according to a modified example. [Figure 8] FIG. 10 is a partial side view of an inner bottle according to a modified example. [Figure 9] FIG. 10 is a partial side view of an inner bottle according to a modified example. [Figure 10] FIG. 10 is a partial vertical cross-sectional view of an inner bottle according to a modified example. DETAILED DESCRIPTION OF THE INVENTION

[0019] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the following description, the radial direction centered on the center line A of the thermally insulated container 1 will be simply referred to as the "radial direction." Furthermore, the circumferential direction centered on the center line A of the thermally insulated container 1 will be simply referred to as the "circumferential direction."

[0020] <1. Composition of the thermal container> FIG. 1 is a front view of a thermal container 1 according to one embodiment of the present invention. FIG. 2 is a vertical cross-sectional view of the thermal container 1. This thermal container 1 is a bottle (water bottle) that can store a beverage (liquid) such as tea or coffee inside. A user of the thermal container 1 can carry the thermal container 1 with the beverage stored therein, and open the lid 20 as needed to drink the beverage inside the thermal container 1. As shown in FIGS. 1 and 2, the thermal container 1 comprises a container body 10 and a lid 20.

[0021] The container body 10 is a cylindrical component with a bottom that stores a beverage inside. The container body 10 is made of stainless steel. As shown in FIG. 2, the container body 10 has a cylindrical inner bottle 31 with a bottom that stores a beverage, and a cylindrical outer bottle 32 with a bottom that covers the outside of the inner bottle 31. The upper ends of the inner bottle 31 and the outer bottle 32 are fixed by welding. Therefore, the inner bottle 31 is suspended from the upper end of the outer bottle 32 and is integrated with the outer bottle 32. The container body 10 also has a vacuum layer 33 between the inner bottle 31 and the outer bottle 32. This keeps the beverage stored inside the container body 10 warm.

[0022] As shown in FIG. 2, the inner bottle 31 has a bottom 41, a body 42, a packing receiving portion 43, a neck 44, and a folded portion 45.

[0023] The bottom 41 is a disk-shaped portion located at the lower end of the inner bottle 31. The body 42 is a cylindrical portion extending upward from the edge of the bottom 41. The packing receiving portion 43 is located above the body 42. The packing receiving portion 43 is the portion that comes into contact with the packing 25 of the lid 20, which will be described later. The packing receiving portion 43 is narrowed radially inward from the body 42 and the neck 44.

[0024] The neck portion 44 is located above the packing receiving portion 43. The neck portion 44 has a cylindrical shape centered on the center line A. The inner diameter of the neck portion 44 is smaller than the inner diameter of the body portion 42. The folded portion 45 is a portion that is folded outward from the upper end of the neck portion 44. The folded portion 45 is the part that the user places their mouth on when drinking the beverage in the container body 10.

[0025] The upper end of the outer bottle 32 is welded to the folded portion 45. In addition, a male screw 46 is formed on the outer peripheral surface of the upper end of the outer bottle 32. The male screw 46 is a helical screw groove.

[0026] The lid 20 is a component that closes the opening at the top of the container body 10. The lid 20 is detachable from the container body 10.

[0027] 3 is a vertical cross-sectional view of the thermally insulated container 1 near the lid 20. As shown in FIGS.

[0028] The top plate portion 21 is a disc-shaped portion that forms the upper surface of the lid body 20. The tubular portion 22 is a cylindrical portion that extends downward from the outer periphery of the top plate portion 21. The top plate portion 21 and the tubular portion 22 are integrally formed from a metal such as stainless steel or a hard resin. The female thread 23 is a helical screw groove formed on the inner periphery of the tubular portion 22. When attaching the lid body 20 to the container body 10, the female thread 23 of the lid body 20 is screwed into the male thread 46 of the container body 10.

[0029] The protrusion 24 is a cylindrical portion with a bottom that protrudes downward from the underside of the top plate 21. The protrusion 24 is formed, for example, from a hard resin. The protrusion 24 is located radially inside the cylindrical portion 22. A heat insulating material 26 is housed between the top plate 21 and the protrusion 24. This can improve the heat retention effect of the beverage stored in the thermal container 1.

[0030] The packing 25 is an elastically deformable sealing member. The packing 25 is made of elastomer or silicone rubber. The packing 25 has a packing body 251 and an annular lip portion 252. The packing body 251 is fixed to the underside of the protrusion 24. The lip portion 252 protrudes outward and downward from the outer periphery of the packing body 251. The lip portion 252 is capable of flexibly deforming.

[0031] 2 and 3, when the lid 20 is attached to the container body 10, the protrusion 24 is inserted into the radially inner side of the neck 44. Furthermore, when the lid 20 is attached to the container body 10 and the female thread 23 is fastened to the male thread 46, the lip portion 252 of the packing 25 elastically deforms and comes into contact with the packing receiving portion 43 of the container body 10. This seals the gap between the container body 10 and the lid 20. Therefore, the beverage stored inside the container body 10 is prevented from leaking out from between the container body 10 and the lid 20.

[0032] <2. Neck shape> Next, we will explain the detailed shape of the neck portion 44. Figure 4 is a partial side view of the inner bottle 31. Figure 5 is a partial vertical cross-sectional view of the inner bottle 31.

[0033] When the thermal container 1 is in use, the beverage is stored below the packing receiving portion 43 of the inner bottle 31. When the lid body 20 is attached to the container body 10, a sealed space S is formed by the portion of the inner bottle 31 below the packing receiving portion 43 and the packing 25 of the lid body 20. As described above, the container body 10 has a double structure of the inner bottle 31 and the outer bottle 32, so the beverage stored in the sealed space S is kept warm.

[0034] However, some of the heat in the sealed space S is conducted from the packing receiving portion 43 of the inner bottle 31 through the neck portion 44 to the folded portion 45, and is then released to the outside of the container body 10. As a result, the temperature of the beverage stored in the sealed space S gradually decreases over time.

[0035] Therefore, in this embodiment, as shown in Figures 4 and 5, the neck portion 44 is provided with a thin-walled portion 441 having a small thickness (thickness in a direction perpendicular to the surface; the same applies below). The thickness d1 of the thin-walled portion 441 is smaller than the thickness d3 of the packing receiving portion 43. Furthermore, the thickness d1 of the thin-walled portion 441 is smaller than the thickness d4 of the folded-back portion 45. By providing the thin-walled portion 441 in the neck portion 44 in this way, the cross-sectional area of ​​the neck portion 44 is reduced. This makes it possible to suppress the conduction of heat in the neck portion 44. This therefore makes it possible to reduce the amount of heat released from the sealed space S inside the container body 10 to the outside via the neck portion 44. As a result, it is possible to suppress a decrease in the temperature of the beverage stored in the sealed space S.

[0036] Other methods for suppressing heat conduction in the neck portion 44 are possible, such as reducing the diameter of the neck portion 44 or increasing the length of the neck portion 44 in the vertical direction. However, these methods make it difficult for the user to clean the inner surface of the container body 10. In this embodiment, heat conduction in the neck portion 44 is suppressed by providing a thin-walled portion 441 in the neck portion 44. Therefore, heat conduction in the neck portion 44 can be suppressed without reducing the diameter of the neck portion 44 or increasing the length of the neck portion 44 in the vertical direction.

[0037] However, if the entire neck portion 44 were made of a thin-walled portion 441, it would be difficult to ensure the strength of the neck portion 44 against external forces and the load of the inner bottle 31. Therefore, in this embodiment, a thick-walled portion 442 is partially provided in the neck portion 44. The thickness d2 of the thick-walled portion 442 is greater than the thickness d1 of the thin-walled portion 441. This makes it possible to improve the strength of the neck portion 44 compared to when the thick-walled portion 442 is not present. Therefore, deformation of the neck portion 44 due to external forces and the load of the inner bottle 31 can be suppressed.

[0038] In this embodiment, the thick-walled portion 442 protrudes from the neck 44 toward the vacuum layer 33. That is, the protrusion formed by the thick-walled portion 442 protrudes from the outer surface of the neck 44, not from the inner surface of the neck 44. In this way, the inner surface of the neck 44 can be made into a cylindrical surface without any irregularities. Therefore, the inner surface of the neck 44 is easier to clean. In addition, the protrusion formed by the thick-walled portion 442 is provided in the closed space between the inner bottle 31 and the outer bottle 32. This prevents irregularities from occurring on the outer surface of the container body 10.

[0039] 4 and 5, in this embodiment, annular thin-walled portions 441 centered on center line A and annular thick-walled portions 442 centered on center line A are arranged alternately in the vertical direction. In this manner, by arranging the thin-walled portions 441 and the thick-walled portions 442 in horizontal stripes along the circumferential direction, upward conduction of heat in the neck portion 44 can be suppressed more effectively than when the thin-walled portions 441 and the thick-walled portions 442 are arranged in vertical stripes along the vertical direction.

[0040] Furthermore, if the thin-walled portion 441 is formed continuously in the circumferential direction as in this embodiment, the upward conduction of heat in the neck portion 44 can be more effectively suppressed than if the thin-walled portion 441 were discontinued in the circumferential direction. Therefore, the heat retention effect of the thin-walled portion 441 can be further improved. Furthermore, if the thick-walled portion 442 is formed continuously in the circumferential direction, the neck portion 44 can be reinforced all around, compared to if the thick-walled portion 442 were discontinued in the circumferential direction. Therefore, the strength of the neck portion 44 can be further improved.

[0041] 4 and 5, the vertical width of thin portion 441 is greater than the vertical width of thick portion 442. In this way, by making the proportion of thin portion 441 in neck portion 44 greater than the proportion of thick portion 442, it is possible to further suppress heat conduction in neck portion 44. However, if emphasis is placed on the strength of neck portion 44, the proportion of thick portion 442 in neck portion 44 may be greater than the proportion of thin portion 441 in neck portion 44.

[0042] In this embodiment, the thickness d1 of the thin-walled portion 441 is smaller than the thickness d3 of the packing receiving portion 43. Therefore, the amount of heat that can be conducted in the thin-walled portion 441 is smaller than the amount of heat that can be conducted in the packing receiving portion 43. Therefore, the heat conducted from the packing receiving portion 43 to the neck portion 44 can be prevented from being conducted upward in the neck portion 44.

[0043] Furthermore, in this embodiment, the average thickness (value obtained by dividing the volume of the neck portion 44 by the area of ​​the inner peripheral surface of the neck portion 44) of the entire neck portion 44, including the thin-walled portion 441 and the thick-walled portion 442, is smaller than the thickness d3 of the packing receiver 43. In this way, heat conduction can be suppressed more in the entire neck portion 44, including the thin-walled portion 441 and the thick-walled portion 442, than in the packing receiver 43. Therefore, the heat conducted from the packing receiver 43 to the neck portion 44 can be further suppressed from being conducted upward in the neck portion 44.

[0044] Furthermore, in this embodiment, the thickness d2 of the thick portion 442 is smaller than the thickness d3 of the packing receiving portion 43. In this way, the amount of heat that can be conducted is smaller not only in the thin portion 441 but also in the thick portion 442 than in the packing receiving portion 43. Therefore, the heat conducted from the packing receiving portion 43 to the neck portion 44 can be further prevented from being conducted upward in the neck portion 44.

[0045] <3. Modifications> Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment. Various modifications will be described below, focusing on the differences from the above embodiment.

[0046] Figure 6 is a partial side view of an inner bottle 31 according to one modified example. In the example of Figure 6, the thick-walled portion 442 has a portion that bends in the vertical direction. Figure 7 is a partial side view of an inner bottle 31 according to another modified example. In the example of Figure 7, the thick-walled portion 442 extends in a wavy line along the circumferential direction. As in Figures 6 and 7, by displacing the thick-walled portion 442 vertically depending on its circumferential position, the strength of the neck portion 44 can be further improved.

[0047] Figure 8 is a partial side view of an inner bottle 31 according to another modified example. As shown in Figure 8, the thick-walled portion 442 may be formed in a spiral shape in the neck 44. Figure 9 is a partial side view of an inner bottle 31 according to another modified example. As shown in Figure 9, the thick-walled portion 442 may be interrupted in the circumferential direction. Furthermore, the shape of the thick-walled portion 442 as viewed from the radially outside is not limited to a rectangular shape, and may be another shape such as a circle.

[0048] Furthermore, by arranging the thick portion 442 along the circumferential direction as shown in Figures 4, 6, 7, and 9, the upward conduction of heat in the neck portion 44 can be more effectively suppressed than when the thick portion 442 is arranged along the vertical direction.

[0049] Fig. 10 is a partial vertical cross-sectional view of an inner bottle 31 according to another modified example. In the above embodiment, as shown in Fig. 5, the thick-walled portion 442 protrudes outward from the neck 44. However, as shown in Fig. 10, the thick-walled portion 442 may protrude inward from the neck 44. In that case, it is desirable that the protrusion formed on the inner peripheral surface of the neck 44 by the thick-walled portion 442 be a smooth protrusion with a curved surface without any corners, as shown in Fig. 10.

[0050] In the above embodiment, an example of a thermal container 1 for storing beverages such as tea or coffee has been described. However, the thermal container of the present invention is not necessarily limited to one for storing beverages. The thermal container of the present invention may also be a food jar for storing liquid foods such as soup. In other words, the thermal container of the present invention may be one that stores food and drink, including beverages and food.

[0051] The detailed shape of the thermal container may differ from that shown in the drawings of the present application. The elements appearing in the above-described embodiments and modifications may be combined as appropriate within the scope of the present invention. [Explanation of symbols]

[0052] 1:Heat container 10: Container body 20: Lid 21: Top plate 22: Cylindrical part 23: Female thread 24: Convex part 25: Packing 26: Insulation material 31: Inner bottle 32: Outer bottle 33: Vacuum layer 41: Bottom 42: Torso 43: Packing receiving part 44: Neck 45: Folded section 46: Male thread 251: Packing body 252: Lip part 441: Thin section 442: Thick meat A: Centerline S: Confined space

Claims

1. A thermal container for storing food and drink, A cylindrical container body with a bottom, a lid that closes the opening at the top of the container body; and The container body is a packing receiving portion with which the packing of the lid body comes into contact; a cylindrical neck portion located above the packing receiving portion; and The neck portion is A thin-walled portion; a thick portion having a thickness greater than that of the thin portion; an insulated container including:

2. The thermal container according to claim 1, The thick-walled portion is arranged along the circumferential direction of the heat-retaining container.

3. The heat-retaining container according to claim 1 or 2, The container body is an inner bottle for containing food and drink; an outer bottle that covers the outside of the inner bottle; and A vacuum layer is formed between the inner bottle and the outer bottle, The inner bottle has the neck, The thick portion protrudes from the neck portion toward the vacuum layer.

4. The heat-retaining container according to claim 1 or 2, The container body is an inner bottle for containing food and drink; an outer bottle that covers the outside of the inner bottle; and A vacuum layer is formed between the inner bottle and the outer bottle, The inner bottle has the neck, The thick portion protrudes inward from the neck portion.

5. The thermal container according to claim 2, The heat-retaining container has the annular thin-walled portion and the annular thick-walled portion aligned in the vertical direction.

6. The heat-retaining container according to claim 1 or 2, The heat-retaining container, wherein the thickness of the thin-walled portion is smaller than the thickness of the packing receiving portion.

7. The thermal container according to claim 6, The average thickness of the neck portion is smaller than the thickness of the packing receiving portion.

8. The thermal container according to claim 7, The heat-retaining container, wherein the thick-walled portion has a thickness smaller than the thickness of the packing receiving portion.

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