JP2022109692A - Heat insulating container and packing structure - Google Patents

Abstract

To provide a heat insulating container and a packing structure which are made compact and lightweight easily.SOLUTION: A heat insulating container comprises a container body having an opening at an upper part, and the container body is composed of a foamed resin. In the heat insulating container, the container body has a bottom wall and a peripheral side wall which extends upward from a peripheral edge part of the bottom wall and defines the opening at an upper end part, and, in a top surface of the bottom wall, a position of a center part is higher than a peripheral part.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to a heat-retaining container and a packing structure, and more particularly to a heat-insulating container having a container body having an opening at the top and a packing structure having a plurality of heat-insulating containers.

Products are transported in physical distribution by packing them in cardboard boxes or the like. When transporting packages such as cardboard boxes, in order to increase work efficiency, multiple packages are piled up on a pallet or the like so that they can be transported simultaneously as a group, forming a single packing structure. produced.

When stacking multiple boxes on a pallet in multiple stages, the arrangement of the boxes on the first stage is the same as the arrangement of the boxes on the second and subsequent stages, and the boxes are stacked vertically in a single row. ” or a method called “row stacking” may be adopted. In addition to such a method, many other loading methods such as "brick stacking" and "alternate row stacking" are employed in which the arrangement of boxes is different between odd-numbered and even-numbered boxes.

In "brick laying", the box on the next level is placed on the boundary between two adjacent boxes on the same level, so the boundary between boxes is not continuous in the height direction. On the other hand, in the stacking method, the boundaries are continuous in the height direction. For example, if two rectangular parallelepiped boxes whose left and right dimensions are about 1.5 times the front and back dimensions are lined up in the longitudinal direction, the length will be about three times as long as the width of the box. If three boxes are arranged side by side so that the direction differs from these boxes by 90 degrees, five boxes will be arranged so as to draw a rectangle. If such an arrangement is performed in the first stage, and after the second stage, the positional relationship between the two boxes and the three boxes is reversed from the lower stage and the boxes are piled up, a group that is resistant to shaking is formed. will be

On the other hand, if the arrangement of the first row and the second and subsequent rows are the same, the finally formed assembly will have five separate rows, and the boxes that make up each row will be placed next to each other. Since there is no constraint on the movement of the boxes in the row, the aggregate becomes vulnerable to rolling and the like. Therefore, when forming a packing structure by stacking boxes, the boxes are fixed with bands, stretch films, or the like. However, in the case of "bar stacking", it is possible to move the boxes in units of rows, which has the advantage of improving the workability of loading and unloading.

By the way, heat-retaining containers having container bodies made of foamed resin are widely used in distribution sites for products such as foods. This type of heat-retaining container has a bottom wall on which food is placed, a peripheral side wall rising from the peripheral edge of the bottom wall, and an upper opening defined by the upper end of the peripheral side wall. A container having a main body and a container further comprising a lid that closes the opening by fitting with the container body are known.

In heat-retaining containers equipped with such lids, the lids are attached to individual container bodies and stacked in rows, but the lids are attached only to the uppermost container body, Lower than that, overlying container bodies have also been used in place of lids for lower container bodies to reduce the overall loading height.

In such a heat-retaining container, as shown in Patent Document 1, an upwardly recessed groove is provided in the outer peripheral portion of the lower surface of the container body, and the upper end portion of the peripheral side wall of the lower heat-retaining container and the lower heat-retaining container are provided. Some measures have been taken to prevent lateral slippage between the upper and lower containers by inserting a projection provided on the lid of the container into a groove.

JP 2005-206246 A

For the above-mentioned heat insulating container and the packing structure constructed by using the heat insulating container, light weight and compactness are required in relation to the amount of loading on trucks and the like and the storage space. . However, such needs have not been fully satisfied. SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a heat insulating container and a packing structure that can be easily made lightweight and compact.

The present invention for solving the above problems is
A heat insulating container comprising a container body having an opening at the top, the container body being made of foamed resin,
the container body having a bottom wall and a peripheral sidewall extending upwardly from a peripheral edge of the bottom wall to define the opening at an upper end;
The upper surface of the bottom wall provides a heat insulating container in which the central portion is higher than the outer peripheral portion.

The present invention also provides
A packaging structure in which a plurality of heat-retaining containers are assembled together,
a container assembly in which the plurality of heat insulating containers are stacked in a row;
a plurality of board members in contact with the outer periphery of the container assembly so as to surround the container assembly;
a fixture for fixing the board material to the container assembly,
The heat retaining container comprises a container body having an opening at the top,
The container body and the board material are made of foamed resin,
The container body has a bottom wall and a peripheral side wall extending upward from a peripheral edge of the bottom wall and defining the opening at an upper end thereof, the central portion of the upper surface of the bottom wall being higher than the peripheral portion. Provide a packaging structure.

A conventional heat insulating container has a horizontal bottom wall, and when an object is stored, the load tends to act as a force that causes the bottom wall to bend downward. The downward force applied to the bottom wall propagates as a force in the direction of tilting the peripheral side wall inward, which can cause the peripheral side wall to bend. When such heat insulating containers are piled up, the peripheral wall may be further bent by the load from above. Therefore, it is difficult to reduce the thickness of the heat insulating container if it has a horizontal bottom wall.

According to the present invention, since the central portion of the bottom wall is higher than the outer peripheral portion, it is difficult to generate a force that causes the bottom wall to bend downward, and the thickness of the heat insulating container can be reduced. Therefore, according to the present invention, it is possible to reduce the weight and size of the heat insulating container and the packing structure.

FIG. 1 is a perspective view showing a heat insulating container of one embodiment. FIG. 2 is a perspective view showing the structure of the heat insulating container of one embodiment. FIG. 3 is a plan view showing a state in which the heat retaining container (outer lid) is viewed from above. FIG. 4 is a plan view showing a state in which the heat insulating container is viewed from below. FIG. 5 is a perspective view of the heat insulating container as seen from below. FIG. 6 is a perspective view showing a container body of one embodiment. FIG. 7 is a cross-sectional view (cross-sectional view taken along line VII-VII in FIG. 6) showing a state of the cross section when the container body is cut along the longitudinal direction on a vertical plane. FIG. 8 is a cross-sectional view (cross-sectional view taken along line IIX-IIX in FIG. 6) showing a state of the cross section when the container body is cut along the lateral direction on a vertical plane. FIG. 9 is a cross-sectional view showing a horizontal cross-section of the container body (a cross-sectional view taken along line IX-IX in FIG. 6). FIG. 10 is a schematic diagram showing the state of the contact surface of the container body. FIG. 11 is a perspective view of the outer lid of one embodiment. FIG. 12 is a cross-sectional view (cross-sectional view taken along line XII-XII in FIG. 11) showing a state of the cross section when the outer cover is cut along the longitudinal direction on a vertical plane. FIG. 13 is a cross-sectional view (a cross-sectional view taken along line XIII-XIII in FIG. 11) showing a state of the cross section when the outer cover is cut along the lateral direction on a vertical plane. FIG. 14 is a cross-sectional view showing a state in which heat-retaining containers having outer lids attached to container bodies are stacked. FIG. 15 is a cross-sectional view showing a state in which heat insulating containers having inner lids attached to container bodies are stacked. FIG. 16 is a perspective view showing the packaging structure of one embodiment. FIG. 17 is a perspective view showing the structure of the packing structure. FIG. 18 is a perspective view showing the state of one side of the board material (the inward side of the packing structure). FIG. 19 is a perspective view showing the state of the other side of the board material (outward facing side of the packing structure).

An embodiment of a heat insulating container and a packing structure according to the present invention will be described below with reference to FIGS. 1 to 19. FIG. As shown in the figure, the packing structure 100 has a container assembly 101 composed of a plurality of heat insulating containers 1. As shown in FIG. First, the thermal insulation container 1 will be described below with reference to FIGS. 1 to 15. FIG.

The heat-retaining container 1 of this embodiment is formed in a box shape that can accommodate commodities (for example, perishables such as vegetables and seafood) as items to be accommodated. The thermal insulation container 1 of the present embodiment is used, for example, for storing products together with ice such as crushed ice. The heat insulating container 1 of this embodiment has a rectangular parallelepiped shape. A heat-retaining container 1 according to the present embodiment includes a foamed resin container body 10 having an opening 1a at the top, and a lid body 20 for closing the opening of the container body. The container body 10 includes a bottom wall 11 and a peripheral side wall (hereinafter also referred to as "main body peripheral side wall 12") extending cylindrically upward from the peripheral edge of the bottom wall 11 and defining the opening 1a at its upper end. Prepare.

As shown in FIGS. 1 and 2, the heat insulating container 1 of this embodiment includes a plurality of lid bodies 20 including an outer lid 21 and an inner lid 22 as the lid bodies 20 . The heat retaining container 1 of this embodiment may have only one of the outer lid 21 and the inner lid 22 , and may not have the lid 20 . The inner lid 22 is arranged inside the main body peripheral side wall 12 to close the opening 1a. The outer lid 21 has a groove portion on the lower surface side that can accommodate the upper end portion of the main body peripheral side wall 12, and covers the opening 1a and the upper end portion of the main body peripheral side wall 12 from above. configured to mate. In this embodiment, the lid 20 is also made of foamed resin.

The foamed resin forming the container body 10 and the lid 20 is not particularly limited, but various foamed resins such as foamed polystyrene, foamed polyethylene, and foamed polypropylene can be used. The foamed resins forming the container body 10 and the lid body 20 may or may not have the same foaming ratio, foaming method, type of resin, and the like. The container main body 10 and the outer lid 21 may be foamed beads. The inner lid 22 can be a sheet molded body obtained by thermoforming a foamed resin sheet or a non-foamed resin sheet, for example.

In the following description, the longitudinal direction X of the heat insulating container 1 is defined as the left-right direction, and the width direction Y of the heat insulating container is defined as the front-rear direction. Therefore, the thermal insulation container 1 of this embodiment has a horizontally long rectangular parallelepiped shape that is long in the left-right direction and short in the front-rear direction. The vertical direction Z (height direction) is based on the illustrated state.

As shown in FIGS. 1 to 11, the container body 10 includes the bottom wall 11 and the body peripheral side walls 12 which are symmetrical in the left-right direction and the front-rear direction. Hereinafter, in the bottom wall 11, the upper surface is called the surface 11a, and the lower surface is called the back surface 11b. In addition, in the main body peripheral wall 12, the outer surface of the container is referred to as an outer peripheral surface 12a, and the inner surface of the container is referred to as an inner peripheral surface 12b.

The bottom wall 11 is formed in a rectangular flat plate shape having rounded corners at four corners. The shape of the bottom wall 11 may be a polygon other than a rectangle (specifically, a polygon having two opposite sides). A surface 11a of the bottom wall 11 corresponds to the bottom surface of the container body 10 and is a surface that supports the contents. As shown in FIGS. 7 and 8, the bottom wall 11 is raised so that the central portion is higher. The surface 11a of the bottom wall 11 has a high vertical position at the central portion and a low vertical position at the outer peripheral portion. The surface 11a is curved and is highest at the central portion and lowest at the outer peripheral portion near the peripheral side wall 12 of the main body.

The rear surface 11b of the bottom wall 11 has a high center portion and a low outer peripheral portion, similar to the front surface 11a. While the front surface 11a of the bottom wall is a convex curved surface, the back surface 11b of the bottom wall 11 is a concave curved surface. The bottom wall 11 has a dome shape in which the upper surface side protrudes upward and the lower surface side is recessed upward. Although the bottom wall 11 of the present embodiment has a rounded dome shape, the raised shape may have a truncated cone shape, for example.

As shown in FIGS. 5 and 10, of the back surface 11b of the bottom wall 11, the portion located below the body peripheral side wall 12 forms a ground surface 1b when the container body 10 is placed in an upright state. On the other hand, in the area inside (on the center side of the container) of the inner peripheral surface 12b of the main body peripheral side wall 12, only a small part of the outermost periphery serves as a contact surface, and most of it is lifted from the contact surface 1b. there is

Since the central portion of the bottom wall 11 of the container body 10 is raised, the load applied to the bottom wall 11 by the contents can be transferred to the peripheral portion of the bottom wall 11 . In addition, when the bottom wall 11 is formed in such a manner, when ice is used for cold insulation, the water generated by the melting of the ice can also be moved to the peripheral edge side in the container, and the water A load can also be applied to the periphery. Furthermore, it is also possible to prevent the contents from getting wet.

In order to more reliably exhibit the functions described above, the height (maximum height: Hb (mm)) of the center portion of the back surface 11b of the bottom wall 11 above the ground contact surface 1b is at least a certain value. is preferred. For example, the ratio (Hb/Ly) of the floating height (Hb (mm)) to the dimension (Ly (mm)) in the transverse direction (front and rear) of the container body 10 can be 1% or more. The ratio of the floating height (Hb) to the longitudinal dimension (Ly) of the container body 10 may be 2% or more, 3% or more, or 7% or more. The ratio (Hb/Lx) of the floating height (Hb (mm)) to the dimension (Lx (mm)) in the longitudinal direction (left and right) of the container body 10 can be set to 0.5% or more. The ratio of the floating height (Hb) to the lateral dimension (Lx) of the container body 10 may be 2% or more, 3% or more, or 5% or more. Also, the ratio (Hb/Lz) of the floating height (Hb (mm)) to the height dimension (Lz (mm)) of the container body 10 can be 1% or more. The ratio (Hb/Lz) of the floating height (Hb) to the height direction dimension (Lz) of the container body 10 may be 2% or more, 10% or more, or 30% or more. may be These numerical values can be appropriately obtained according to the magnitude of the force that causes the side wall to collapse inward due to the load of the contents and the load distribution, and the number of multi-tiered stacks.

In order to ensure a large internal volume of the container body 10, the ratio of the floating height (Hb) to the longitudinal dimension (Ly) of the container body 10 can be, for example, 10% or less. The ratio of the floating height (Hb) to the longitudinal dimension (Ly) of the container body 10 may be 9% or less, or 8% or less. The ratio of the floating height (Hb) to the left-right dimension (Lx) of the container body 10 can be, for example, 10% or less. The ratio of the floating height (Hb) to the lateral dimension (Lx) of the container body 10 may be 9% or less, or 8% or less. The ratio (Hb/Lz) of the floating height (Hb) to the dimension (Lz) in the height direction of the container body 10 can be, for example, 50% or less. The ratio (Hb/Lz) of the floating height (Hb) to the height dimension (Lz) of the container body 10 may be 40% or less, or 35% or less. A specific dimension of the floating height (Hb) depends on the size of the container body 10 and the weight of the contents, but is usually 5 mm or more and 60 mm or less. The dimension is preferably 15 mm or more and 50 mm or less.

The raised height (maximum height: Ha (mm)) of the raised bottom wall 11 within the container body 10 can be set to the same value as the exemplified floating height (Hb). That is, the height (Ha) of the center portion can be 5 mm or more and 60 mm or less, preferably 15 mm or more and 50 mm or less. The ratio (Ha/Ly) of the height (Ha) of the container body 10 to the front and back dimension (Ly (mm)), the ratio (Ha/Lx) to the left and right dimension (Lx (mm)), the height dimension ( Regarding the specific numerical value of the ratio (Ha/Lz) to Lz (mm)), the same value as the ratio (Hb/Ly, Hb/Lx, Hb/Lz) to the floating height (Hb) is adopted. can be It should be noted that the specific dimensions and ratio values of the floating height (Hb) and the raised height (Ha) need not be common and may be different.

The rear surface 11b of the bottom wall 11 forms the ground surface 1b of the container body 10 on the outer side of the floating region. On the back surface 11 b side of the bottom wall 11 , a portion positioned below the main body peripheral side wall 12 is recessed upward, and this recessed portion extends in a direction around the periphery of the bottom wall 11 . , forming a groove portion (hereinafter also referred to as "main body groove portion 10b"). The main body groove portion 10b has a shape that allows the upper end portion of the main body peripheral side wall 12 to enter. Therefore, as shown in FIG. 15, when a plurality of container bodies 10 having the same shape are stacked, the upper end portion of the container body 10 in the lower stage and the container body 10 in the upper stage are separated from each other by the body groove portion 10b. It is configured to be in a mated state. The body groove portion 10b in this embodiment has a shape that surrounds the entire circumference of the container body 10, and as shown in FIG. It is prepared to be

The body peripheral side wall 12 is formed in a substantially rectangular frame shape by rising upward from the peripheral edge of the bottom wall 11 . The main body peripheral side wall 12 of the present embodiment has four walls, a left side wall 121 and a right side wall 122 arranged to face each other in the left-right direction, and a front side wall 123 and a rear side wall 124 arranged to face each other in the front-rear direction. consists of parts. Left and right side walls 121 and 122 rise vertically from left and right edges, which are a pair of short sides of the bottom wall. The front and rear side walls 123 and 124 rise vertically from the front and rear edges, which are the pair of long sides of the bottom wall 11 . The main body peripheral wall 12 forms a substantially rectangular parallelepiped accommodation space 1c whose upper end surface, which is the end in the height direction, coincides with the opening. The upper end portion of the main body peripheral side wall 12 has a shape that allows it to enter the main body groove portion 10b.

The upper end portion of the main body peripheral wall 12 in this embodiment has a wedge-shaped cross-section when cut along a plane perpendicular to the direction of rotation along the outer edge of the opening 1a. That is, the thickness of the upper end portion of the main body peripheral side wall 12 decreases upward. The upper edge of the body peripheral side wall 12, which becomes thinner upward, may be C-chamfered or R-chamfered. That is, the wedge-shaped cross section may have a flat portion or a rounded tip. Since the thickness of the upper end portion of the main body peripheral side wall 12 becomes thinner toward the upper side, it is difficult for ice chips to be placed on the upper end of the main body peripheral side wall 12, and the container bodies 10 are overlapped with each other. It is possible to prevent foreign matter from getting caught when fitting the outer lid 21 to the container body 10 .

In this embodiment, the upper end portion of the main body peripheral wall 12 has a wedge-shaped cross-section with the inner wall surface of the container being a vertical surface and the outer wall surface of the container being a tapered surface that tapers outward. . Further, in this embodiment, the main body peripheral side wall 12 has a C-chamfered upper edge, and the upper end surface is a horizontal surface. Since the upper end edge is chamfered, chipping and cracking are less likely to occur in the peripheral side wall 12 of the main body. The horizontal width (dimension in the thickness direction) of the body peripheral side wall 12 is, for example, 4 mm or more and 8 mm or less.

In this embodiment, the body groove portion 10b also has a wedge-shaped cross section. As will be described in detail later, the groove formed in the outer lid 21 (hereinafter also referred to as "outer lid groove 21a") also has the same cross-sectional shape as the main body groove 10b. Although the function exhibited by the shape of the main body groove portion 10b will be described below, the function is similarly exhibited by the outer lid groove portion 21a.

The main body groove portion 10b having the wedge-shaped cross section has a vertical wall surface on the inside of the container and a tapered surface on which the wall surface on the outside of the container tapers outward. As described above, the upper end portion of the main body peripheral wall 12 also has a tapered surface in which the inner wall surface of the container is vertical and the outer wall surface of the container tapers outward. Therefore, in this embodiment, when the container bodies 10 are stacked, the vertical surfaces and the tapered surfaces of the body peripheral side wall 12 of the lower container body 10 and the body groove portion 10b of the upper container body 10 are aligned. It comes into contact.

At the position where the vertical surfaces abut against each other, the body groove 10b and the body peripheral wall 12 are provided with recesses and projections that engage with each other when the container bodies 10 are stacked. . That is, one of the engaging concave portion and the engaging convex portion is provided on the vertical surface of the main body groove portion 10b, and the other is provided on the vertical surface of the main body peripheral wall 12. As shown in FIG. In the present embodiment, the peripheral side wall 12 of the main body is provided with an engaging concave portion 12c, and the main body groove portion 10b is provided with an engaging convex portion 11c.

The engaging projections 11c may be provided in a point-like manner or may be provided in a continuous linear shape with a certain length in the extending direction of the main body groove portion 10b. The engaging recesses 12c may also be provided in a point-like manner, or may be provided in a continuous linear shape with a certain length in the direction of circling the peripheral side wall 12 of the main body. The engagement projection 11c of this embodiment is provided so as to be continuous over the entire circumference of the main body groove portion 10b, and the engagement recess 12c is provided so as to be continuous over the entire circumference of the main body peripheral side wall 12. ing. The projection dimension of the engagement recess 12c and the recession dimension of the engagement projection 11c are, for example, approximately 1 mm.

In this embodiment, as described above, the central portion of the surface 11a of the bottom wall 11 is raised to prevent the body peripheral wall 12 from being subjected to a force that causes the body to fall inward. Such an effect can be exhibited more remarkably by making the tapered surfaces abut against each other when the main bodies 10 are stacked. In this regard, in this embodiment, when the container bodies 10 are stacked, the load applied from the upper container body 10 to the lower container body 10 is applied to the tapered surface. The force applied to the tapered surface is converted into a force that strongly brings the vertical surfaces into close contact with each other, and the reaction force acts outward on the main body peripheral side wall 12 . As a result, the body peripheral wall 12 is prevented from collapsing inward. In addition, the above action contributes to the improvement of the airtightness of the container body 10 and contributes to exhibiting excellent heat retention. The above effect is exhibited even if the shape of the back surface 11b of the bottom wall 11 is not concave upward. That is, the same effect can be obtained even if the back surface 11b of the bottom wall 11 is flat (horizontal surface). Similarly to the front surface 11a, the rear surface 11b can also be arranged so that the central portion is high and the outer peripheral portion is low, thereby improving the storage efficiency.

The elevation angle of the tapered surface with respect to the horizontal plane can be, for example, 45 degrees or more. The elevation angle may be 47 degrees or more, or may be 50 degrees or more. The elevation angle can be, for example, 80 degrees or less. The elevation angle may be 75 degrees or less, or may be 72 degrees or less.

As shown in FIGS. 2 and 6, ribs 12d extending in the height direction are provided on the inner peripheral surface 12b side of the main body peripheral side wall 12, and a plurality of the ribs 12d are provided at regular intervals in the peripheral direction. It is That is, the inner peripheral surface 12b of the main body peripheral side wall 12 is in a state in which unevenness is repeated in the peripheral direction. In this embodiment, the reinforcing effect of the ribs 12d is exerted, so that the main body peripheral side wall 12 can be made thinner.

The rib 12d is not provided on the outer peripheral surface 12a side of the main body peripheral side wall 12, and the peripheral surface 12a has a generally flat shape. On the lower end side of the main body peripheral side wall 12, two recessed portions 12e opened in the outer peripheral surface 12a are arranged side by side in each of the four side walls (left side wall 121, right side wall 122, front side wall 123, and rear side wall 124). , and the recesses 12e are provided at a total of eight locations. The two recesses 12e provided on each side wall are spaced apart so that the thumb of one hand can be inserted into one and the middle finger and index finger can be inserted into the other. That is, the portion between the two recesses 12e is a gripping portion 10d that can be gripped by a human hand.

As shown in FIGS. 4 and 9, the two concave portions 12e that are adjacent to each other via the grip portion 10d have shapes that approach each other in the concave direction. In other words, the grip portion 10d has a shape whose width increases from the inside to the outside of the container. The width of the grip portion 10d (width on the outer peripheral surface) is, for example, about 20 mm to 150 mm, and the depth of the recess 12e is, for example, about 10 mm to 30 mm.

In the present embodiment, the grip portion 10d is widened by about 5 mm to 15 mm (about 10 mm to 30 mm in total) at each concave portion 12e. Since the gripping portion 10d has such a structure, the gripping portion 10d can be easily gripped by the fingertips, and the handleability of the container body 10 is improved. For example, a container row is formed by stacking a plurality of container bodies 10 in a row, and this container row is mounted on a roller conveyor arranged downward, and automatically slides on the roller conveyor by its weight. In situations such as transporting a row of containers, without the gripping portion 10d, it is necessary to go around the front of the row of containers and adjust the moving speed. , the row of containers can be firmly grasped with one hand even from the rear or side of the movement direction, and the movement speed can be easily adjusted or stopped.

The recess 12e is formed to extend to the bottom wall 11 and reach the ground plane. In this embodiment, the lower end surface of the grip portion 10d constitutes a part of the ground surface 1b of the container body 10, and the grip portion 10d extends upward from the lower end portion of the container body 10 to form a columnar shape. . Therefore, the body peripheral side wall 12 of the present embodiment is configured to exhibit excellent load-bearing strength.

As shown in FIGS. 7 to 10, the peripheral side wall 12 of the main body 12 is not only thin at the portion corresponding to the recess 12e, but also has a certain thickness at the recess 12e. It has an inwardly protruding shape in order to Therefore, the horizontal cross section of the main body peripheral wall 12 at the location where the recess 12e is formed does not have a simple rectangular annular shape, but a shape in which the rectangular annular shape is once offset inward at the location where the recess 12e is formed. have. By having such a cross-sectional shape, the body peripheral side wall 12 of the present embodiment is configured to exhibit excellent load-bearing strength.

As shown in FIGS. 3, 12, and 13, the outer lid 21 in this embodiment has a rectangular shape in plan view similar to that of the container body 10. It has a hanging peripheral side wall (hereinafter also referred to as “outer lid peripheral side wall 212”). The outer lid 21 has an outer lid groove portion 21a in which the upper end portion of the main body peripheral side wall 12 can enter. That is, the outer lid groove portion 21a is provided in such a manner that the lower end surface of the outer lid peripheral side wall 212 is recessed upward. The outer lid groove portion 21a has a wedge-shaped cross-section like the main body groove portion. The outer lid groove portion 21a is configured such that the vertical surfaces and the tapered surfaces are in contact with each other when fitted to the container body 10 .

The outer cover groove portion 21a has a wedge-shaped cross-section like the upper end portion of the main body peripheral side wall 12, like the main body groove portion 10b, but is deeper than the main body groove portion 10b. When the outer lid 21 and the container main body 10 are fitted together, a space is provided between the deepest portion of the outer lid groove portion 21a and the upper end portion of the main body peripheral side wall 12 . The vertical dimension of the space may be, for example, 1 mm or more. The dimension may be 1.5 mm or greater. The dimension can be, for example, 5 mm or less.

The outer cover groove portion 21a is also common to the main body groove portion 10b in that it has an engagement convex portion 21b on the vertical surface. Therefore, when the outer lid 21 and the container main body 10 are fitted together, the engagement concave portion 12c provided on the vertical surface of the upper end portion of the main body peripheral side wall 12 and the engagement convex portion 21b are aligned. It can be in an engaged state. The projection height of the engaging projection 21b provided on the outer lid 21 can be set to about 1 mm, the same as the engaging projection 11c provided on the main body groove 10b.

The ceiling wall 211 of the outer lid 21 has a dome shape like the bottom wall 11 . That is, the ceiling wall 211 has a curved surface in which the upper surface protrudes upward and has a convex shape, whereas the lower surface has a concave curved surface in which the lower surface is recessed upward. The upper surface of the ceiling wall 211 has a central portion raised higher than the peripheral portion. The height of the raised portion is slightly lower than the lifted height of the bottom wall 11, so that when the container body 10 is stacked on the outer lid 21, the raised portion strongly hits the lower surface of the container body 10. It's not supposed to.

The ceiling wall 211 has a ridge 21c that enters the main body groove portion 10b when the container main body 10 is stacked thereon. The ridge 21c has the same cross-sectional shape as the upper end portion of the peripheral side wall 12 of the container body 10. As shown in FIG. The ridges 21c of the present embodiment are not formed over the entire circumference, but are arranged at the four corners of the outer lid 21, and extend in the short side direction and the long side direction from the four corners to form a shape in plan view. is hook-shaped (L-shaped).

The inner lid 22 provided in the thermal insulation container 1 of the present embodiment as the lid body 20 together with the outer lid 21 is thinner than the container body 10 and the outer lid 21 as shown in FIGS. It is made of a sheet-like material and has excellent elastic deformability. The inner lid 22 has a shape that is slightly larger than the opening 1a, and is configured to be fitted inside the main body peripheral side wall 12 by being pushed inside. The inner lid 22 has a groove portion (hereinafter also referred to as "inner lid groove portion 22a") in the peripheral portion.

The inner lid groove portion 22 a is recessed downward from above and is formed so as to circle along the outer peripheral edge portion of the inner lid 22 . The shape of the inner lid groove portion 22a in plan view is a rectangular ring. The inner lid groove portion 22a is formed by bending a sheet-like material forming the inner lid 22 downward once at the outer peripheral portion and then folding it back upward on the outer side.

Since the inner lid 22 has the inner lid groove portion 22a, the dimension in the plane direction can be changed (expansion/contraction is possible) within a certain range. When the inner lid 22 is pushed into the container body 10, the inner lid groove portion 22a is elastically deformed so that the width of the inner lid groove portion 22a is narrowed, and the inner lid 22 is configured to be locked to the container body 10 by a restoring force against the elastic deformation. It is The inner lid 22 of this embodiment is formed so that the dimension from the center to the outer peripheral edge is larger than the dimension of the opening 1a at the top of the container body 10 by 2 mm to 6 mm. That is, the inner lid 22 of the present embodiment has elastic deformability capable of restoring its original shape even if it is contracted by 4 mm or more in the left-right direction and the front-rear direction. The inner lid 22 may be restorable for shrinkage of 6 mm or more, and may be restorable for shrinkage of 8 mm or more.

A region of the inner lid 22 inside the inner lid groove portion 22 a has a dome shape, and has a shape corresponding to the lower surface of the outer lid 21 . A gripping portion for gripping the inner lid 22 (hereinafter also referred to as an “inner lid gripping portion 22b”) is provided in the central portion of the inner lid 22 . The inner lid gripping portion 22b has two semicircular recesses spaced apart from each other in the dome-shaped central portion of the inner lid. It is formed by providing so that a part may become an outside.

Since the inner lid 22 has a dome shape, for example, when the crushed ice is placed on the container body 10 after the container main body 10 contains the container, the crushed ice is gathered to the central portion. Demonstrate. Since the inner lid of this embodiment can freely change the pushing depth to some extent, for example, the position can be lowered until the lower surface contacts the crushed ice, and if the position is lowered further, the crush at the dome-shaped portion Ice can be loaded higher. As a result, the thermal insulation container 1 of the present embodiment can lengthen the time until the crushed ice melts completely.

The heat-retaining container 1 of the present embodiment has excellent heat-retaining properties by having the inner lid 22 as described above, and furthermore, the crushed ice keeps well. However, it can exhibit the same heat retention performance as the conventional one. The heat retaining container 1 of the present embodiment has a plurality of lids 20 including an outer lid 21 and an inner lid 22 as the lids 20 fitted to the container body 10, and the plurality of lids 20 are each independent. 14 and 15, it is possible to change the packing style as shown in FIG. 14 and FIG. .

The heat insulating container 1 of the present embodiment is excellent in strength and heat retention, so that the volume can be reduced and the thickness of various parts can be reduced compared to conventional heat insulating containers, and it is lightweight and compact. can be something Moreover, the thermal insulation container 1 of this embodiment can exhibit the above effects more remarkably by forming a packing structure as described below.

A packing structure 100 using the heat insulating container 1 will be described below with reference to FIGS. 16 to 19. FIG.
In the packing structure 100 of the present embodiment, as shown in FIGS. 16 and 17, a plurality of heat insulating containers 1 are assembled together. The packing structure 100 of this embodiment can be easily transported by being loaded on a pallet 500 or the like.

The packing structure 100 includes a container assembly 101 in which a plurality of heat insulating containers 1 are stacked in a row, and a plurality of board members in contact with the outer peripheral portion of the container assembly 101 so as to surround the container assembly. 102 and a fixture for fixing the board material 102 to the container assembly 101 . In this embodiment, a plurality of bands 103 are provided as the fixture.

The container assembly 101 includes one or more container rows 101a in which the heat insulating containers 1 are stacked in six stages. The container assembly 101 includes a plurality of container rows 101a in which a plurality of the heat insulating containers 1 are stacked in a row, and the plurality of container rows 101a are arranged in at least one of the front, rear, left, and right directions of the container assembly 101. are arranged as follows. The container assembly 101 in this embodiment is composed of six container rows 101a. The container assembly 101 has an overall shape of a quadrangular prism, in which six rows of containers 101a are assembled so that the side walls of the container body 10 are in contact with each other. That is, in the container assembly 101 of the present embodiment, two container rows 101a are arranged in the left-right direction, and three container rows 101a are arranged in the front-rear direction.

The board member 102 is a rectangular plate made of foamed resin, as shown in FIGS. The board member has a length that allows simultaneous contact with the container rows 101a at both ends of the plurality of container rows 101a arranged in the front, rear, left, and right directions. That is, in this embodiment, each side surface of the container assembly 101 can be covered with one board material 102 . In addition, in this embodiment, each side surface is covered with two boards 102 . The number of board members 102 used to cover each side surface can be appropriately changed according to the number (height) of the thermal insulation containers 1 stacked.

In this embodiment, when one side surface of the container assembly 101 is covered with a plurality of board members 102, one side is formed with unevenness for the purpose of positioning the board members 102 with each other. In the present embodiment, a projecting portion 102a having a rectangular shape in plan view and a recessed portion 102b having a rectangular shape in plan view are formed on one side of the board material 102 . The contour line of this one side overlaps the original shape when rotated 180 degrees around the midpoint in the length direction of this side. That is, in the board material 102 of the present embodiment, when another board material having the same shape is prepared and arranged so that the sides on which the unevenness is formed face each other, the protruding portions 102a of each other are opposed to each other. It shows a relationship such that it enters the recessed portion 102b on the side. In order to exhibit such a relationship, the shape of the projecting portion 102a and the recessed portion 102b may be other than rectangular, and may be triangular, semicircular, or the like. Also, two or more protrusions 102a and two or more recesses 102b may be provided on one side. Furthermore, such protrusions 102a and recesses 102b may be provided on a plurality of sides or may be provided on all sides.

On the two left and right sides of the board material 102, chamfered portions 102c are formed by chamfering the corners of the surface side so as to clearly indicate the position around which the band 103 is hung.

Since the board material 102 of the present embodiment is made of foamed resin, it can be cut with a cutter knife or the like as necessary to easily adjust the dimensions in the width direction and the height direction. Further, in the board member 102 of the present embodiment, a new chamfered portion 102c can be formed by cutting a corner at a location different from the previously formed chamfered portion 102c.

The board member 102 not only has a projecting portion 102a projecting outward in the planar direction, but also has a projecting portion 102d projecting in the thickness direction. The convex portion 102d is provided only on one side of the board member 102. As shown in FIG. A plurality of protrusions 102d are provided on one side of the board member 102, and four protrusions 102d are provided in this embodiment. When the board member 102 is erected so that the side on which the projecting portion 102a is formed becomes the upper edge and the board material 102 is erected and viewed from the front, the straight line connecting them forms a rectangle. It is arranged so as to draw the diagonal line. Then, as shown in FIG. 18, the two upper protrusions 102d1 are smaller in size than the two lower protrusions 102d2.

In the present embodiment, the container body 10 has an opening on the outer peripheral surface of the body peripheral side wall 12, and a concave portion 12e recessed toward the inside of the container is formed on each side wall (left side wall 121, right side wall 122, front side wall 123). , rear side wall 124). Therefore, in the container assembly 101 of this embodiment, the plurality of concave portions 12e are positioned on the outer peripheral portion. The convex portion 102d of the board material 102 has a shape that allows it to enter the concave portion 12e. Since the board member 102 is provided with the convex portion 102d that can enter the concave portion 12e, positioning of the board member 102 with respect to the container assembly 101 can be facilitated in this embodiment.

On the four side surfaces of the container assembly 101 of this embodiment, the concave portions 12e are arranged at regular intervals in the height direction and the left-right direction or in the height direction and the front-rear direction. The four convex portions 102d are arranged so that when the board member 102 is brought into contact with the side surface of the container aggregate 101, it can simultaneously enter the plurality of concave portions 12e. Of the four protrusions 102d, when two of the protrusions 102d having a vertical positional relationship are paired, the pair of protrusions 102d is connected to another heat insulating container 1 in the same container row 101a. Entering the recess 12e, another pair of protrusions 102d are arranged so that another container row 101a can similarly enter the recess 12e.

A plurality of recesses 12e are provided on the outer peripheral portion of the container aggregate 101, and the board member 102 is provided with two protrusions 102d that can simultaneously enter one recess and the other of the plurality of recesses 12e. As a result, the positioning of the board member 102 with respect to the container assembly 101 can be made more reliable. Each of the plurality of heat insulating containers 1 arranged in the height direction has the recess 12e, and the recess 12e is provided on the outer peripheral portion of the container assembly 101 at regular intervals in the height direction, The board member 102 is provided with two protrusions 102d that can simultaneously enter one recess and the other of the plurality of recesses 12e arranged in the height direction. Positioning of the board material 102 relative to the can be more secure. Further, with such a configuration, the board material 102 suppresses the shaking of the container row 101a.

In this embodiment, as shown in FIG. 17, all the heat-retaining containers 1 constituting the container assembly 101 are in a state in which the outer lids 21 are fitted to the container bodies 10. However, the container assembly 101 is , a first state in which only the container bodies 10 are stacked in a row, and a second state in which the outer lids 21 are fitted to the respective container bodies 10 and stacked in a row. It is preferable that the board material 102 is capable of inserting the two protrusions 102d into one recess and the other recess at the same time in both the first state and the second state.

In this embodiment, such a thing is made possible by making the upper convex portion 102d1 smaller than the lower convex portion 102d2. More specifically, the upper protrusion 102d1 has a height dimension smaller than that of the lower protrusion 102d2.

Let h1 (mm) be the dimension in the height direction of the upper projection 102d1, h2 (mm) be the dimension in the height direction of the lower projection 102d2, and the interval (P1 (mm)) and the interval (P2 (mm)) of the recess 12e in the second state is defined as ΔP (P2-P1). When the upper convex portion 102d1 is allowed to enter the concave portion 12e of the heat insulating container 1 which is n above the heat insulating container 1 having the concave portion 12e into which the lower convex portion 102d1 enters, for example, the following conditional expression (1) is satisfied. By doing so, the board material 102 can simultaneously push the two protrusions 102d into the two recesses 12e in both the first state and the second state.
h1≦(h2−n×ΔP) (1)

As described above, in this embodiment, the board material 102 is made of foamed resin and can be easily processed with a cutter knife or the like. The shape of the convex portion 102d may be processed according to the position of the concave portion 12e on the assembly 101 side.

In this embodiment, the container assembly 101 is constructed with the container rows 101a in contact with each other, and the container assembly 101 is surrounded by the foamed resin board material 102 having excellent heat insulation properties. Therefore, it is possible to store and transport the contents in an excellent heat-retaining state. In this embodiment, a plurality of bands 103 are wound around the board member 102 covering the container assembly 101 to bundle the row of containers 101a. As the adhesion is enhanced, the adhesion between the container rows 101a is also improved. Therefore, it is difficult for outside air to enter the gap and reduce heat retention.

As described above, the heat-retaining container 1 of the present embodiment includes a container body 10 having an opening 1a at the top, and the container body 10 is a heat-retaining container made of foamed resin. It has a wall 11 and a peripheral side wall 12 extending upward from the peripheral edge of the bottom wall 11 and defining the opening 1a at the upper end. higher than the department.

In addition, as described above, the packaging structure 100 of the present embodiment is a packaging structure in which a plurality of heat insulating containers 1 are assembled into one package, and the plurality of heat insulating containers 1 are piled up in a row. an aggregate 101, a plurality of board members 102 abutting on the outer peripheral portion of the container aggregate 101 so as to surround the container aggregate 101, and fixing for fixing the board members 102 to the container aggregate 101. The heat insulating container 1 includes a container body 10 having an opening 1a at the top, the container body 10 and the board material 102 are made of foamed resin, and the container body 10 has a bottom It has a wall 11 and a peripheral side wall 12 that extends upward from the peripheral edge of the bottom wall 11 and defines the opening 1a at the upper end, and the position of the central part of the upper surface (surface 11a) of the bottom wall 11 is the peripheral part. higher than

As described above, in the present embodiment, it is possible to reduce the amount of heat insulating material contained in the heat insulating container 1 and to thin the heat insulating container 1, thereby reducing the weight of the heat insulating container 1 and the packing structure 100. and compactness can be achieved.

In the thermal insulation container 1 of this embodiment, the bottom wall 11 may have a dome shape.
In that case, in this embodiment, the effect of further reducing the weight and improving the accommodation efficiency can be further exhibited.

The heat-retaining container 1 of this embodiment further has a lid 20 that fits with the container body 10 and closes the opening 1a of the container body 10. The lid 20 includes an outer lid 21 and an inner lid 22. The inner lid 22 is disposed inside the peripheral side wall 12 and closes the opening 1a, and the outer lid 21 is configured such that the upper end portion of the peripheral side wall 12 is Even if it has an enterable groove (outer lid groove 21a) on the lower surface side and is configured to fit with the container body 10 in a state where the upper ends of the opening 1a and the peripheral side wall 12 are covered from above. good.

The heat-retaining container 1 of this embodiment includes the outer lid 21, and both the cross-sectional shape of the groove portion (outer lid groove portion 21a) of the outer lid 21 and the cross-sectional shape of the upper end portion of the container body 10 are wedge-shaped. may
In this case, when the outer lid 21 is fitted to the container body 10, foreign matter such as ice is less likely to get caught.

In the heat insulating container 1 of this embodiment, the depth of the groove portion (outer lid groove portion 21a) is deeper than the entry dimension of the upper end portion of the peripheral side wall 12, and the outer lid 21 and the container body 10 are fitted. A space may be provided between the deepest portion of the groove portion (outer lid groove portion 21a) and the upper end portion of the peripheral side wall 12 in the closed state.
In that case, fitting of the outer lid 21 to the container body 10 can be performed more reliably.

In the thermal insulation container 1 of the present embodiment, the groove portion (outer lid groove portion 21a) having the wedge-shaped cross section has a vertical wall surface on the inside of the container and a tapered surface on which the wall surface on the outside of the container tapers downward toward the outside. In addition, the upper end portion of the peripheral wall 12 also has a tapered surface in which the inner wall surface of the container is vertical and the outer wall surface of the container tapers downward toward the outside. The vertical surfaces and the tapered surfaces may contact each other when the container body 10 is fitted.
In that case, an inward force acts on the upper end of the peripheral wall 12, and an outward force acts on the central portion of the peripheral wall 12 in the height direction. can become difficult to fall into.

The heat retaining container 1 of the present embodiment is provided with an engaging concave portion and an engaging convex portion that are engaged when the outer lid 21 is fitted to the container body 10, and the engaging concave portion and the engaging convex portion are provided. One of the mating protrusions may be provided on the vertical surface of the groove, and the other may be provided on the vertical surface of the peripheral side wall.
In that case, fitting of the outer lid 21 to the container body 10 can be performed more reliably.

The heat insulating container 1 of the present embodiment may include the inner lid, and the inner lid may have a dome shape.
In that case, a large storage space can be secured.
Also, in that case, when ice or the like is accommodated inside, the ice tends to be collected in the central portion, and the ice lasts longer.

In the heat insulating container 1 of this embodiment, the container main body 10 is provided with a graspable grip portion 10d. Two concave portions 12e are arranged side by side, and the holding portion 10d is provided between the concave portions 12e. It may have a shape that approaches each other as it goes toward.
In this case, since the recesses 12e on both sides of the grip portion 10d are formed so as to wrap around the back side of the grip portion 10d, the grip portion 10d can be firmly gripped.

In the heat insulating container 1 of this embodiment, the lower end surface of the grip portion 10d constitutes a part of the ground surface 1b of the container body 10, and the grip portion 10d extends upward from the lower end portion of the container body 10. It may be columnar.
In this case, since the holding portion 10d is columnar, the thermal insulation container 1 can exhibit excellent strength against the stacking load.

The packing structure 100 of the present embodiment can be made lighter and more compact by using the heat insulating container 1 as described above. Since it is provided, it is possible to prevent collapse of the load of the heat insulating container 1 and to exhibit further excellent heat insulating properties.

In the packing structure 100 of the present embodiment, the container assembly 101 includes a plurality of container rows 101a in which a plurality of the heat insulating containers 1 are stacked in a row. The board members 120 may be arranged so as to line up in at least one of the front, rear, left, and right directions, and have a length that allows the board members 120 to come into contact with the container rows at both ends in the one direction at the same time.
In that case, a single board material 102 can be used for heat insulation of a plurality of container rows 101a, and efficient heat insulation can be performed.

In the packing structure 100 of the present embodiment, the container body 10 is provided with a concave portion 12e that is opened on the outer peripheral surface of the peripheral side wall 12 and is recessed toward the inside of the container, and the outer periphery of the container aggregate 101 is provided. The recessed portion 12e may be positioned at a portion of the board member 102, and a convex portion 102d that can enter the recessed portion 12e may be provided on at least one side of the board member 102. As shown in FIG.
In this case, when the board member 102 is set on the container aggregate 101, the convex portion 102d can be pushed into the concave portion 12e, thereby facilitating the positioning of the board member 102 on the container aggregate 101. At the same time, displacement of the board material 102 set on the container assembly 101 can be suppressed.

In the packing structure 100 of the present embodiment, the plurality of recesses 12e are provided on the outer peripheral portion of the container assembly 101, and the board material 102 is provided in one recess and the other recesses of the plurality of recesses 12e. Two convex portions 102d that can be thrust in at the same time may be provided.
In that case, the positioning of the board member 102 to the container assembly 101 can be made more reliable.

In the packing structure 100 of the present embodiment, each of the plurality of heat insulating containers 1 arranged in the height direction has the recess 12e, and the container assembly 101 has the recess 12e at the outer peripheral portion of the container assembly 101. The board member 102 is provided with two projections 102d which are provided at regular intervals in the direction of the board and can simultaneously plunge into one and the other of the plurality of recesses 12e arranged in the height direction. may
In that case, the mounting position of the board material 102 in the vertical direction of the container assembly 101 can be changed.

In the packing structure 100 of the present embodiment, the heat insulating container 1 further has an outer lid 21 that fits with the container body 10 and closes the opening 1a of the container body 10. A groove portion (outer lid groove portion 21a) into which the upper end portion of the peripheral side wall 12 can enter is provided on the lower surface side, and is fitted with the container body 10 while covering the opening 1a and the upper end portion of the peripheral side wall 12 from above. It may be configured as
The container assembly 101 has a first state in which only the container bodies 10 are stacked in a row, and a second state in which the outer lids 21 are fitted to the respective container bodies 10 and stacked in a row. , the intervals at which the recesses 12e are arranged in the height direction are different, and the board material 102 has the two protrusions 102d in both the first state and the second state. and can enter at the same time.
In this case, the board material 102 can be shared between the first state and the second state, which improves convenience.

In this embodiment, the thermal insulation container 1 and the packing structure 100 are exemplified as described above, but the present invention is not limited to the above exemplifications.

1: Thermal insulation container, 1a: opening 10: container body, 11: bottom wall, 12: main body peripheral side wall (peripheral side wall), 12e: recess 20: lid body, 21: outer lid, 22: inner lid,
100: packing structure, 101: container assembly, 101a: row of containers, 102: board material, 102d: convex portion, 103: band (fixture)

Claims (16)

A heat insulating container comprising a container body having an opening at the top, the container body being made of foamed resin,
the container body having a bottom wall and a peripheral sidewall extending upwardly from a peripheral edge of the bottom wall to define the opening at an upper end;
The upper surface of the bottom wall is a heat insulating container in which the central portion is higher than the outer peripheral portion. 2. The heat insulating container according to claim 1, wherein said bottom wall has a dome shape. further comprising a lid that fits with the container body and closes the opening of the container body;
At least one of an outer lid and an inner lid is provided as the lid body,
The inner lid is arranged inside the peripheral side wall and configured to block the opening,
The outer lid has a groove on the lower surface side into which the upper end of the peripheral side wall can enter, and is configured to fit with the container body while covering the opening and the upper end of the peripheral side wall from above. 3. The heat insulating container according to claim 1 or 2. comprising the outer lid,
4. The heat insulating container according to claim 3, wherein the cross-sectional shape of said groove portion of said outer cover and the cross-sectional shape of said upper end portion of said container body are both wedge-shaped. The depth of the groove is deeper than the entry dimension of the upper end of the peripheral side wall,
5. The heat insulating container according to claim 4, wherein a space is provided between the deepest part of the groove and the upper end of the peripheral side wall when the outer lid and the container body are fitted together. The groove portion having the wedge-shaped cross section has a vertical wall surface on the inside of the container and a tapered surface on which the wall surface on the outside of the container tapers downward toward the outside, and
The upper end of the peripheral side wall also has a tapered surface in which the inner wall surface of the container is vertical and the outer wall surface of the container tapers outward,
6. The heat insulating container according to claim 4, wherein the vertical surfaces and the tapered surfaces are in contact with each other when the outer lid and the container body are fitted together. An engaging concave portion and an engaging convex portion that are engaged when the outer lid is fitted to the container body are provided,
7. The heat insulating container according to claim 6, wherein one of said engaging concave portion and said engaging convex portion is provided on said vertical surface of said groove, and the other is provided on said vertical surface of said peripheral side wall. comprising the inner lid,
4. The heat insulating container according to claim 3, wherein said inner lid has a dome shape. The container body is provided with a graspable grasping part,
The container main body is provided with two recesses that are open on the outer peripheral surface of the peripheral side wall and are recessed toward the inside of the container, and the grip portion is provided between the recesses,
8. The heat insulating container according to any one of claims 1 to 7, wherein each of the two recesses adjacent to each other via the holding part has a shape that approaches each other as it goes in the recessing direction. the lower end surface of the grip portion constitutes a part of the ground surface of the container body,
10. The heat insulating container according to claim 9, wherein said gripping portion extends upward from the lower end portion of said container body and has a columnar shape. A packaging structure in which a plurality of heat-retaining containers are assembled together,
a container assembly in which the plurality of heat insulating containers are stacked in a row;
a plurality of board members in contact with the outer periphery of the container assembly so as to surround the container assembly;
a fixture for fixing the board material to the container assembly,
The heat retaining container comprises a container body having an opening at the top,
The container body and the board material are made of foamed resin,
The container body has a bottom wall and a peripheral side wall extending upward from a peripheral edge of the bottom wall and defining the opening at an upper end thereof, the central portion of the upper surface of the bottom wall being higher than the peripheral portion. packing structure. The container assembly includes a plurality of container rows in which a plurality of the heat insulating containers are stacked in a row,
The plurality of container rows are arranged so as to line up in at least one of the front, rear, left, and right directions of the container assembly,
12. The packing structure according to claim 11, wherein the board material has a length capable of coming into contact with the row of containers at both ends in the one direction at the same time. The container body is provided with a recess that is open on the outer peripheral surface of the peripheral side wall and is recessed toward the inside of the container, and is arranged so that the recess is positioned on the outer peripheral portion of the container assembly,
13. The packing structure according to claim 11 or 12, wherein at least one side of said board material is provided with a convex portion that can enter said concave portion. A plurality of recesses are provided in the outer peripheral portion of the container assembly,
14. The packaging structure according to claim 13, wherein the board material is provided with two protrusions that can simultaneously enter one recess and the other of the plurality of recesses. Each of the plurality of heat insulating containers arranged in the height direction has the recess,
The recesses are provided at regular intervals in the height direction on the outer periphery of the container assembly,
15. The packing structure according to claim 14, wherein said board member is provided with two said protrusions capable of simultaneously entering one recess and the other of said plurality of recesses arranged in the height direction. The heat retaining container further has an outer lid that fits with the container body and closes the opening of the container body,
The outer lid has a groove on the lower surface side into which the upper end of the peripheral side wall can enter, and is configured to fit with the container body while covering the opening and the upper end of the peripheral side wall from above. and
The container assembly has a first state in which only the container bodies are stacked in a row, and a second state in which the outer lids are fitted to the respective container bodies and stacked in a row. The spacing in the direction is different,
16. The packing structure according to claim 15, wherein the board material allows the two protrusions to be pushed into the one recess and the other recess at the same time in both the first state and the second state.

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