JP2007236593A - Heat insulation container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat insulation container which reduces an occupied volume of a container body without reducing the capacity and prevents a dent even when an impact is applied to the outer wall of the container. <P>SOLUTION: The heat insulation container is composed of a stainless steel container body 2 and a cover body 3 which covers an opening 6 of the container body 2 in an openable/closable manner. The container body 2 is composed of an inside and outside double-wall made of an outer wall 4 and an inner wall 5 and is provided with a heat-insulation structure in which a hollow portion between the outer wall 4 and the inner wall 5 is sealed up in an approximately vacuum state. The container body 2 is formed in an approximately rectangle tubular shape and a plurality of ribs 8 extendedly provided in the peripheral direction of the outer wall 4 are placed vertically on the container body 2. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a heat insulating container for storing food and drink such as cooked rice in a heat insulating state, and in particular, a stainless steel container body is an inner / outer double wall composed of an outer wall and an inner wall, and a cavity between the outer wall and the inner wall is in a vacuum state. The present invention relates to a heat insulating container having a heat insulating structure.

  2. Description of the Related Art Conventionally, a lunch box is provided in which a rice container and a vegetable container are removably stored in a case (for example, Patent Document 1). The rice container of such a lunch box is generally formed in a cylindrical shape and constitutes a vacuum heat insulation container made of stainless steel inner and outer double walls, so it is possible to keep the cooked cooked rice warm for a long time. it can.

JP 2002-360327 A

  However, when a heat-insulating container such as a rice container is formed in a cylindrical shape, the volume occupied when the container is stored in a case or bag or carried at home, or compared with the internal capacity for storing cooked rice or the like Becomes larger. This is because, in the case of a cylindrical body, the space for storing or storing the container requires the diameter dimension of the cylindrical body in both the width direction and the depth direction, so the difference between the occupied volume and the internal capacity is large. Because. Therefore, in order to reduce the occupied volume of the heat insulating container without reducing the capacity of the cooked rice, it is desired to form the heat insulating container in a rectangular cylindrical shape.

  However, if the vacuum heat insulation container made of stainless steel inner and outer double walls is in the shape of a rectangular cylinder, the outer wall is placed inside the container when an external impact is applied to the flat part of the outer wall, for example, it falls on the floor surface. It becomes easy to dent. This phenomenon is attributed to the fact that the cavity between the outer wall and the inner wall is in a vacuum state, and that the impact force acting on the flat portion of the outer wall cannot be released to other parts of the outer wall. And if the outer wall of the inner and outer double-walled heat insulation container sinks inside the container, the outer wall and the inner wall come into contact with each other, so that the heat insulation effect is remarkably reduced and the heat insulation performance of cooked rice or the like is lowered.

  This problem is peculiar to the case where the heat insulating container is a rectangular cylinder, and in the case of a cylindrical heat insulating container, the impact force acting on the outer wall can be dispersed around the cylindrical outer wall, so that a dent is formed. It is hard to occur and does not become a problem.

  The present invention has been made for the purpose of solving the above-described problems, and the container body is formed in a substantially rectangular tube shape to reduce the occupied volume of the container itself without reducing the capacity of food and drink such as cooked rice. In addition, the present invention provides a heat insulating container that reinforces the outer wall and does not dent even when an impact is applied.

  In order to achieve the above object, the present invention adopts as a solution means a container body (2) made of stainless steel, and a lid body that covers the opening (6) of the container body (2) so as to be freely opened and closed ( 3), the container body (2) is an inner / outer double wall consisting of an outer wall (4) and an inner wall (5), and the cavity (7) between the outer wall (4) and the inner wall (5) is substantially omitted. In a heat insulating container having a heat insulating structure sealed in a vacuum state, the container body (2) is formed in a substantially rectangular cylindrical shape, and a plurality of ribs (8) extending in the circumferential direction of the outer wall (4) are vertically arranged. It is in a side-by-side configuration.

  In the above configuration, more preferably, the plurality of ribs (8) are formed by deforming the stainless steel plate constituting the outer wall (4) so as to bulge out in a cross-sectional arc shape from the inside to the outside.

  According to the heat insulation container according to the present invention, since the container main body has a substantially rectangular cylindrical shape, the container main body can be reduced in size without reducing the capacity of food and drink such as cooked rice, and the outer wall. The multiple ribs provided on the wall generally reinforce the outer wall of the substantially rectangular tube shape, so that even when an external impact is applied to the substantially flat outer wall surface, it does not dent and the cavity between the outer wall and the inner wall is good Can be maintained.

  In addition, if the rib is formed by deforming the stainless steel plate constituting the outer wall so as to bulge in a cross-sectional arc from the inside to the outside, the rib can be formed as an integral structure with respect to the outer wall. The outer wall can be easily cleaned, and a heat-insulating container excellent in hygiene can be realized.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. FIG.1 and FIG.2 is the figure which shows the heat insulation container 1 in this embodiment, FIG. 1 is the perspective view, FIG. 2 is the longitudinal cross-sectional view. The heat retaining container 1 is composed of a stainless steel container body 2 and a lid 3 that covers the opening 6 of the container body 2 so as to be freely opened and closed.

  The container body 2 is a rectangular tube having a substantially rectangular shape in plan view, and is formed as an inner / outer double wall composed of an outer wall 4 and an inner wall 5. The outer wall 4 and the inner wall 5 are welded to each other along the periphery of the opening 6 of the container body 2, and the wall 5a and the bottom 5b of the inner wall 5 excluding the opening 6 are held in contact with the inner surface of the outer wall 4, A certain cavity 7 is formed between the outer wall 4 and the inner wall 5.

  The outer wall 4 includes a wall portion 4a and a bottom portion 4b, and a plurality of ribs 8 extending in the circumferential direction of the cylindrical shape are arranged in parallel in the vertical direction of the container body 2 on the surface of the wall portion 4a. ing. The rib 8 is formed by deforming the stainless steel plate itself constituting the outer wall 4 into a cross-sectional arc shape from the inside to the outside by press forming. On the other hand, the inner wall 5 constitutes a smooth surface having no such rib.

  An air vent 9 for decompressing the cavity 7 is provided in the center of the bottom 4 b of the outer wall 4, and vacuum formation of the cavity 7 is performed via the air vent 9. And after making the cavity part 7 into a fixed vacuum state, the air vent 9 is welded and sealed, and the cavity part 7 is sealed in a substantially vacuum state. For this reason, the container main body 2 is implement | achieved as a heat insulation container of the heat insulation structure by a vacuum double wall. FIG. 2 shows a state in which the air vent 9 is sealed. A bottom member 10 for concealing the sealed air vent 9 is provided at the bottom 4 b of the outer wall 4.

  The lid 3 is formed in a substantially rectangular shape in plan view, like the container body 2, and the center thick bottom portion 11 fits inside the inner wall 5 of the container body 2 and the upper peripheral edge 12 closes the opening 6 of the container body 2. Thus, the inside of the container body 2 is sealed. Further, a heat insulating material 13 such as styrene foam is provided inside the thick bottom portion 11 of the lid 3, and when the lid 6 is covered with the opening 6, the inside of the container body 2 is insulated and kept warm.

  According to the heat retaining container 1 having the above-described configuration, food and drink such as cooked rice are placed inside the inner wall 5 of the container body 2 and covered with the lid 3 to keep the food and drink in a warm state for a long time. And since the container main body 2 is formed in the substantially rectangular rectangular tube shape, the difference between the internal volume for accommodating food and drink and the occupied volume when the container is carried or stored is reduced, and FIG. As shown, the container body 2 can be made smaller without reducing the internal capacity for storing food and drink such as cooked rice, and the occupied volume during carrying and storage can be reduced as compared with the cylindrical container 2a. In other words, it is possible to realize an occupied volume comparable to that of the cylindrical container 2a, and to increase the capacity of the container body 2.

  Further, a plurality of ribs 8 provided on the surface of the wall portion 4a of the container body 2 at substantially equal intervals are formed around the rectangular cylindrical wall portion 4a so that the outer wall 4 of the container body 2 is entirely formed. Therefore, even when an impact is applied to the substantially flat wall portion 4a, the surface of the outer wall 4 is prevented from sinking into the inside of the container and causing a dent. In this regard, in order to reinforce the outer wall of the container body formed in a substantially rectangular cylindrical shape, for example, as in the comparative example shown in FIG. 4A, vertical ribs extending in the vertical direction on the outer wall 4c of the container body 2b. It is considered that 8b may be formed. However, in this case, since the container body 2b needs to weld the outer wall 4c and the inner wall 5c forming the vacuum double wall along the upper opening edge, the vertical rib 8b leaves the mouth e at the opening edge. Thus, it must be formed so as to extend from a position below the mouth e to the vicinity of the bottom. Therefore, when the outer wall 4c receives an external force such as an impact, the outer wall 4c is easily deformed inward at the mouth portion e. Therefore, as shown in FIG. 4B, the outer wall 4c includes the vertical ribs 8b. It includes the problem of depression. On the other hand, according to the present invention, since the circumferential rib 8 is formed over the entire circumference of the outer wall 4, the rib 8 constitutes a node that restrains the entire circumference of the outer wall 4 and is deformed inward. Since there is nothing, there is an advantage that it does not dent even when it receives external force such as impact. Further, the plurality of ribs 8 function as a slip stopper when the outer wall 4 of the container body 2 is held, and the slippery stainless steel container body 2 is easy to handle.

  The plurality of ribs 8 may be formed in a ring shape around the outer wall 4 or may be formed in a spiral shape. The plurality of ribs 8 may be formed by forming a ring-shaped reinforcing member or a spiral reinforcing member separate from the outer wall 4 and welding them to the surface of the outer wall 4. In consideration of the above, it is preferable that the stainless steel plate itself constituting the outer wall 4 is press-molded as described above to form an integral structure formed by raising the surface of the outer wall 4 in an arc shape. In this case, the outer wall 4 provided with the ribs 8 can be easily cleaned, and the hygiene aspect is improved.

  Therefore, the heat insulation container 1 of this embodiment can reduce the capacity | capacitance of the container itself, without reducing the capacity | capacitance of food / beverages, such as cooked rice, by forming the container main body 2 in a substantially rectangular cylinder shape, and goes to the circumference direction of the outer wall 4. Since the outer wall 4 is reinforced by arranging a plurality of ribs 8 in the vertical direction of the container body 2, the outer wall 4 may be recessed even when an impact is applied, such as when the heat retaining container 1 is dropped on the floor surface. In addition, it is possible to prevent the outer wall 4 and the inner wall 5 from coming into contact with each other and maintain a good heat insulating effect.

  In addition, although the above-mentioned structure is applicable to the rice container for lunch boxes, it is a structure which can fully be applied also to a water bottle and another heat retention container.

It is a perspective view which shows the heat retention container as one Embodiment of this invention. It is a longitudinal cross-sectional view of a heat retention container. It is explanatory drawing which shows the capacity | capacitance difference of a cylindrical container and a rectangular cylindrical container, and has shown notionally the top view which piled up each container. The comparative example is shown, (A) is a longitudinal cross-sectional view which shows the container which provided the vertical rib, (B) is a longitudinal cross-sectional view which shows the state in which the outer wall was depressed including the vertical rib.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Thermal insulation container 2 Container main body 3 Cover body 4 Outer wall 5 Inner wall 6 Opening part 7 Cavity part 8 Rib

Claims (2)

It consists of a stainless steel container body (2) and a lid (3) that covers the opening (6) of the container body (2) so that it can be opened and closed. In the heat insulating container having a heat insulating structure in which the hollow portion (7) between the outer wall (4) and the inner wall (5) is sealed in a substantially vacuum state, with the inner and outer double walls made of (5),
The container body (2) is formed in a substantially rectangular cylindrical shape, and a plurality of ribs (8) extending in the circumferential direction of the outer wall (4) are arranged in parallel up and down.   The heat insulating container according to claim 1, wherein the rib (8) is formed by deforming a stainless steel plate constituting the outer wall (4) so as to bulge out in an arc shape from the inside toward the outside. .

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